Product Description
Product Description
The spline is a kind of linear motion system. When spline motions along the precision ground Shaft by balls, the torque is transferred. The spline has compact structure. It can transfer the Over load and motive power. It has longer lifetime. At present the factory manufacture 2 kinds of spline, namely convex spline and concave spline. Usually the convex spline can take bigger radial load and torque than concave spline.
| Product name | Ball spline |
| Model | GJZ,GJZA,GJF,GJH,GJZG,GJFG, |
| Dia | 15mm-150mm |
| Material | Bearing Steel |
| Precision Class | Normal/ High/ Precise |
| Package | Plastic bag, box, carton |
| MOQ | 1pc |
Ball type:φ16-φ250
High speed , high accuracy
Heavy load , long life
Flexible movement,low energy consumption
High movement speed
Heavy load and long service life
Applicationgs:semiconductor equipment,tire machinery,monocrystalline silicon furnace,medical rehabilitation equipment
Product Parameters
Structure
Scope of application
Semiconductor equipment,tire machinery,monocrystalline silicon furnace,medical rehabilitation equipment.
FFZ size
| Code and type | Nominal axial dia. d0 |
External dia. D |
Length of spline nut L1 |
Max. length of shaft L |
Standard rated torque | Basic rated load | ||
| Dynamic torsion N-m |
Stationary torsion N-m |
Dynamic load C kN |
Static load C0 kN |
|||||
| GJZG16 / GJFG16 | 16 | 31 | 50 | 500 | 32 | 30 | 7.5 | 15.6 |
| GJZG20 / GJFG20 | 20 | 35 | 63 | 600 | 55 | 55 | 10.1 | 24.7 |
| GJZG25 / GJFG25 | 25 | 42 | 71 | 800 | 103 | 105 | 13.7 | 30.1 |
| GJZG30 / GJFG30 | 30 | 48 | 80 | 1400 | 148 | 171 | 17.1 | 37.1 |
| GJZG40 / GJFG40 | 40 | 64 | 100 | 1500 | 375 | 415 | 32.1 | 70.2 |
| GJZG50 / GJFG50 | 50 | 80 | 125 | 1500 | 760 | 840 | 49.4 | 104.9 |
| GJZG60 / GJFG60 | 60 | 90 | 140 | 1500 | 1040 | 1220 | 64.2 | 128.2 |
| GJZG80 / GJFG80 | 80 | 120 | 160 | 1700 | 1920 | 2310 | 87.3 | 170.7 |
| GJZG100/ GJFG100 | 100 | 150 | 190 | 1900 | 3571 | 3730 | 109.9 | 222 |
| GJZG120 / GJFG120 | 120 | 180 | 220 | 1900 | 4100 | 5200 | 176.5 | 347 |
If you have any needs,pls feel free to contact us and we will send you our catalog for reference.
Main Products
Company Profile
Customer Feedback
FAQ
1. Why choose AZI China?
With more than 60 years of production experience, quality assurance,factory directly price.
2. What is your main products ?
Our Main products are consist of ball screw,linear guide,arc linear guide,ball spline and ball screw linear guide rail module.
3. How to Custom-made (OEM/ODM)?
If you have a product drawing or a sample, please send to us, and we can custom-made the as your required. We will also provide our professional advices of the products to make the design to be more realized & maximize the performance.
4. When can I get the quotation?
We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price,please call us or tell us in your email so that we will regard your inquiry priority.
5. How can I get a sample to check the quality?
We quote according to your drawing, the price is suitable, CHINAMFG the sample list.
6. What‘s your payment terms?
Our payment terms is 30% deposit,balance against receiving copy of B/L or L/C sight.
/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
| Material: | Gcr15 |
|---|---|
| Load: | Customized |
| Stiffness & Flexibility: | Stiffness / Rigid Axle |
| Journal Diameter Dimensional Accuracy: | Customized |
| Transport Package: | Cartons or Wooden Box |
| Specification: | 16-120 |
| Samples: |
US$ 10/Set
1 Set(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|
How do spline shafts handle variations in torque and rotational force?
Spline shafts are designed to handle variations in torque and rotational force in mechanical systems. Here’s a detailed explanation:
1. Interlocking Splines:
Spline shafts have a series of interlocking splines along their length. These splines engage with corresponding splines on the mating component, such as gears or couplings. The interlocking design ensures a secure and robust connection, capable of transmitting torque and rotational force.
2. Load Distribution:
When torque is applied to a spline shaft, the load is distributed across the entire engagement surface of the splines. This helps to minimize stress concentrations and prevents localized wear or failure. The load distribution capability of spline shafts allows them to handle variations in torque and rotational force effectively.
3. Material Selection:
Spline shafts are typically made from materials with high strength and durability, such as alloy steels. The material selection is crucial in handling variations in torque and rotational force. It ensures that the spline shaft can withstand the applied loads without deformation or failure.
4. Spline Profile:
The design of the spline profile also contributes to the handling of torque variations. The spline profile determines the contact area and the distribution of forces along the splines. By optimizing the spline profile, manufacturers can enhance the load-carrying capacity and improve the ability of the spline shaft to handle variations in torque.
5. Surface Finish and Lubrication:
Proper surface finish and lubrication play a crucial role in the performance of spline shafts. A smooth surface finish reduces friction and wear, while suitable lubrication minimizes heat generation and ensures smooth operation. These factors help in handling variations in torque and rotational force by reducing the impact of friction and wear on the spline engagement.
6. Design Considerations:
Engineers take several design considerations into account to ensure spline shafts can handle variations in torque and rotational force. These considerations include appropriate spline dimensions, tooth profile geometry, spline fit tolerance, and the selection of mating components. By carefully designing the spline shaft and its mating components, engineers can optimize the system’s performance and reliability.
7. Overload Protection:
In some applications, spline shafts may be equipped with overload protection mechanisms. These mechanisms, such as shear pins or torque limiters, are designed to disconnect the drive temporarily or slip when the torque exceeds a certain threshold. This protects the spline shaft and other components from damage due to excessive torque.
Overall, spline shafts handle variations in torque and rotational force through their interlocking splines, load distribution capability, appropriate material selection, optimized spline profiles, surface finish, lubrication, design considerations, and, in some cases, overload protection mechanisms. These features ensure efficient torque transmission and enable spline shafts to withstand the demands of various mechanical systems.
Can spline shafts be repaired or maintained when necessary?
Yes, spline shafts can be repaired and maintained when necessary to ensure their continued functionality and performance. Here are some ways spline shafts can be repaired and maintained:
1. Inspection and Assessment:
When an issue is suspected with a spline shaft, the first step is to conduct a thorough inspection. This involves examining the shaft for any signs of wear, damage, or misalignment. Special attention is given to the spline teeth, which may show signs of wear or deformation. Through inspection and assessment, the extent of the repair or maintenance required can be determined.
2. Spline Tooth Repair:
If the spline teeth are damaged or worn, they can be repaired or replaced. Repair methods may include re-machining the teeth to restore their original profile, filling and reshaping the worn areas using specialized welding techniques, or replacing the damaged section of the spline shaft. The specific repair method depends on the severity of the damage and the material of the spline shaft.
3. Lubrication and Cleaning:
Regular lubrication and cleaning are essential for maintaining spline shafts. Lubricants help reduce friction and wear between the mating surfaces, while cleaning removes contaminants that can affect the spline’s engagement. During maintenance, old lubricants are removed, and fresh lubricants are applied to ensure smooth operation and prevent premature failure.
4. Surface Treatment:
If the spline shaft undergoes wear or corrosion, surface treatment can be applied to restore its condition. This may involve applying coatings or treatments to enhance the hardness, wear resistance, or corrosion resistance of the spline shaft. Surface treatments can improve the longevity and performance of the spline shaft, reducing the need for frequent repairs.
5. Balancing and Alignment:
If a spline shaft is experiencing vibration or misalignment issues, it may require balancing or realignment. Balancing involves redistributing mass along the shaft to minimize vibrations, while alignment ensures proper mating and engagement with other components. Balancing and alignment procedures help optimize the performance and longevity of the spline shaft.
6. Replacement:
In cases where the spline shaft is severely damaged or worn beyond repair, replacement may be necessary. Replacement spline shafts can be sourced from manufacturers or specialized suppliers who can provide shafts that meet the required specifications and tolerances.
It’s important to note that the repair and maintenance of spline shafts should be carried out by qualified professionals with expertise in precision machining and mechanical systems. They have the knowledge and tools to properly assess, repair, or replace spline shafts, ensuring the integrity and functionality of the system in which they are used.
By implementing regular maintenance and timely repairs, spline shafts can be kept in optimal condition, extending their lifespan and maintaining their performance in various mechanical applications.
What is a spline shaft and what is its primary function?
A spline shaft is a mechanical component that consists of a series of ridges or teeth (called splines) that are machined onto the surface of the shaft. Its primary function is to transmit torque while allowing for the relative movement or sliding of mating components. Here’s a detailed explanation:
1. Structure and Design:
A spline shaft typically has a cylindrical shape with external or internal splines. The external spline shaft has splines on the outer surface, while the internal spline shaft has splines on the inner bore. The number, size, and shape of the splines can vary depending on the specific application and design requirements.
2. Torque Transmission:
The main function of a spline shaft is to transmit torque between two mating components, such as gears, couplings, or other rotational elements. The splines on the shaft engage with corresponding splines on the mating component, creating a mechanical interlock. When torque is applied to the spline shaft, the engagement between the splines ensures that the rotational force is transferred from the shaft to the mating component, allowing the system to transmit power.
3. Relative Movement:
Unlike other types of shafts, a spline shaft allows for relative movement or sliding between the shaft and the mating component. This sliding motion can be axial (along the shaft’s axis) or radial (perpendicular to the shaft’s axis). The splines provide a precise and controlled interface that allows for this movement while maintaining torque transmission. This feature is particularly useful in applications where axial or radial displacement or misalignment needs to be accommodated.
4. Load Distribution:
Another important function of a spline shaft is to distribute the applied load evenly along its length. The splines create multiple contact points between the shaft and the mating component, which helps to distribute the torque and axial or radial forces over a larger surface area. This load distribution minimizes stress concentrations and reduces the risk of premature wear or failure.
5. Versatility and Applications:
Spline shafts find applications in various industries and systems, including automotive, aerospace, machinery, and power transmission. They are commonly used in gearboxes, drive systems, power take-off units, steering systems, and many other rotational mechanisms where torque transmission, relative movement, and load distribution are essential.
6. Design Considerations:
When designing a spline shaft, factors such as the torque requirements, speed, applied loads, and environmental conditions need to be considered. The spline geometry, material selection, and surface finish are critical for ensuring proper engagement, load-bearing capacity, and durability of the spline shaft.
In summary, a spline shaft is a mechanical component with splines that allows for torque transmission while accommodating relative movement or sliding between mating components. Its primary function is to transmit rotational force, distribute loads, and enable axial or radial displacement in various applications requiring precise torque transfer and flexibility.
editor by CX 2024-04-16
China manufacturer China Factory Directly Flange Type Ball Spline Shaft for CNC Machine
Product Description
Product description
The spline is a kind of linear motion system. When spline motions along the precision ground Shaft by balls, the torque is transferred. The spline has compact structure. It can transfer the Over load and motive power. It has longer lifetime. At present the factory manufacture 2 kinds of spline, namely convex spline and concave spline. Usually the convex spline can take bigger radial load and torque than concave spline.
| Product name | Ball spline |
| Model | GJZ,GJZA,GJF,GJH,GJZG,GJFG, |
| Dia | 15mm-150mm |
| Material | Bearing Steel |
| Precision Class | Normal/ High/ Precise |
| Package | Plastic bag, box, carton |
| MOQ | 1pc |
Specifications
Ball type:φ16-φ250
High speed , high accuracy
Heavy load , long life
Flexible movement,low energy consumption
High movement speed
Heavy load and long service life
Applicationgs:semiconductor equipment,tire machinery,monocrystalline silicon furnace,medical rehabilitation equipment
Company profile
HangZhou CHINAMFG has a full performance laboratory of rolling functional components, high-speed ball screw pair 60m/min running noise 70dB, high-speed rolling linear guide pair 60m/min running noise 68dB, for precision horizontal machining center batch matching ball screw pair, rolling guide pair, to achieve each axis fast moving speed 40m/min, positioning accuracy 0.002mm, repeated positioning accuracy 0.001mm. Our equipments import from Japan and Germany and so on.
FAQ
Why choose AZI China?
With more than 60 years of production experience, quality assurance,factory directly price.
How can I get a sample to check the quality?
We quote according to your drawing, the price is suitable, CHINAMFG the sample list.
What is your main products ?
Our Main products are consist of ball screw,linear guide,arc linear guide,ball spline and ball screw linear guide rail module.
| Material: | Gcr15 |
|---|---|
| Load: | Customized |
| Stiffness & Flexibility: | Stiffness / Rigid Axle |
| Journal Diameter Dimensional Accuracy: | Customized |
| Axis Shape: | Straight Shaft |
| Shaft Shape: | Real Axis |
| Samples: |
US$ 10/Set
1 Set(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|
Can spline shafts be used in both mobile and stationary machinery?
Yes, spline shafts can be used in both mobile and stationary machinery. Here’s a detailed explanation:
1. Mobile Machinery:
Spline shafts find extensive use in various types of mobile machinery. For example:
- In Automotive Applications: Spline shafts are commonly used in automotive drivetrains, where they transmit torque from the engine to the wheels. They are found in components such as the transmission, differential, and axle shafts.
- In Construction and Earthmoving Equipment: Spline shafts are utilized in construction machinery, such as excavators, loaders, and bulldozers. They are employed in the powertrain systems to transfer torque and drive the hydraulic pumps or propel the machine.
- In Agricultural Equipment: Spline shafts are used in agricultural machinery like tractors, combines, and harvesters. They help transfer power from the engine to various driven components, such as the wheels, PTO (power take-off), or hydraulic systems.
- In Off-Road Vehicles: Spline shafts are present in off-road vehicles, including ATVs (all-terrain vehicles) and military vehicles. They enable power transmission to the wheels or drivetrain components, ensuring mobility and performance in challenging terrains.
2. Stationary Machinery:
Spline shafts are also widely employed in stationary machinery across various industries. Some examples include:
- In Machine Tools: Spline shafts are used in machine tools, such as lathes, milling machines, and grinding machines. They provide torque transmission in the spindle or lead screw mechanisms, enabling precision motion control and material removal operations.
- In Industrial Gearboxes: Spline shafts play a crucial role in industrial gearboxes used in manufacturing and processing plants. They transmit torque between input and output shafts, enabling speed reduction or increase as required by the application.
- In Power Generation: Spline shafts are utilized in power generation equipment, including turbines and generators. They help transmit torque between the rotating rotor and the stationary components, facilitating energy conversion.
- In Pump and Compressor Systems: Spline shafts are present in pumps and compressors used in various industries. They transmit torque from the motor or prime mover to the impeller or compressor elements, enabling fluid or gas transfer.
The versatility of spline shafts makes them suitable for a wide range of applications, both mobile and stationary. Their ability to efficiently transmit torque, accommodate misalignment, distribute loads, and provide reliable connections makes them a preferred choice in diverse machinery across industries.
Can spline shafts be repaired or maintained when necessary?
Yes, spline shafts can be repaired and maintained when necessary to ensure their continued functionality and performance. Here are some ways spline shafts can be repaired and maintained:
1. Inspection and Assessment:
When an issue is suspected with a spline shaft, the first step is to conduct a thorough inspection. This involves examining the shaft for any signs of wear, damage, or misalignment. Special attention is given to the spline teeth, which may show signs of wear or deformation. Through inspection and assessment, the extent of the repair or maintenance required can be determined.
2. Spline Tooth Repair:
If the spline teeth are damaged or worn, they can be repaired or replaced. Repair methods may include re-machining the teeth to restore their original profile, filling and reshaping the worn areas using specialized welding techniques, or replacing the damaged section of the spline shaft. The specific repair method depends on the severity of the damage and the material of the spline shaft.
3. Lubrication and Cleaning:
Regular lubrication and cleaning are essential for maintaining spline shafts. Lubricants help reduce friction and wear between the mating surfaces, while cleaning removes contaminants that can affect the spline’s engagement. During maintenance, old lubricants are removed, and fresh lubricants are applied to ensure smooth operation and prevent premature failure.
4. Surface Treatment:
If the spline shaft undergoes wear or corrosion, surface treatment can be applied to restore its condition. This may involve applying coatings or treatments to enhance the hardness, wear resistance, or corrosion resistance of the spline shaft. Surface treatments can improve the longevity and performance of the spline shaft, reducing the need for frequent repairs.
5. Balancing and Alignment:
If a spline shaft is experiencing vibration or misalignment issues, it may require balancing or realignment. Balancing involves redistributing mass along the shaft to minimize vibrations, while alignment ensures proper mating and engagement with other components. Balancing and alignment procedures help optimize the performance and longevity of the spline shaft.
6. Replacement:
In cases where the spline shaft is severely damaged or worn beyond repair, replacement may be necessary. Replacement spline shafts can be sourced from manufacturers or specialized suppliers who can provide shafts that meet the required specifications and tolerances.
It’s important to note that the repair and maintenance of spline shafts should be carried out by qualified professionals with expertise in precision machining and mechanical systems. They have the knowledge and tools to properly assess, repair, or replace spline shafts, ensuring the integrity and functionality of the system in which they are used.
By implementing regular maintenance and timely repairs, spline shafts can be kept in optimal condition, extending their lifespan and maintaining their performance in various mechanical applications.
What are the advantages of using spline shafts in mechanical systems?
Using spline shafts in mechanical systems offers several advantages. Here’s a detailed explanation:
1. Torque Transmission:
Spline shafts provide efficient torque transmission between the driving and driven components. The interlocking splines ensure a secure and reliable transfer of rotational force, enabling the transmission of power and motion in mechanical systems.
2. Relative Movement Accommodation:
Spline shafts can accommodate relative movement between the driving and driven components. They allow axial, radial, and angular displacements, compensating for misalignments, thermal expansion, and vibrations. This flexibility helps to maintain proper engagement and minimize stress concentrations.
3. Load Distribution:
The splines on the shaft distribute the transmitted load across the entire engagement surface. This helps to reduce localized stresses and prevents premature wear or failure of the components. The load distribution capability of spline shafts contributes to the overall durability and longevity of the mechanical system.
4. Precise Positioning and Control:
Spline shafts enable precise positioning and control of mechanical components. The splines provide accurate rotational alignment, allowing for precise angular positioning and indexing. This is crucial in applications where precise control and synchronization of movements are required.
5. Interchangeability and Standardization:
Spline shafts are available in standardized designs and dimensions. This enables interchangeability between components and facilitates easier maintenance and replacement. Standardization also simplifies the design and manufacturing processes, reducing costs and lead times.
6. High Power Transmission Capacity:
Spline shafts are designed to withstand high torque loads. The interlocking splines provide a large contact area, distributing the transmitted torque across multiple teeth. This allows spline shafts to handle higher power transmission requirements, making them suitable for heavy-duty applications.
7. Versatility:
Spline shafts can be designed and manufactured to suit various application requirements. They can be customized in terms of size, shape, number of splines, and spline profile to match the specific needs of a mechanical system. This versatility makes spline shafts adaptable to a wide range of industries and applications.
8. Reduced Slippage and Backlash:
When properly designed and manufactured, spline shafts exhibit minimal slippage and backlash. The tight fit between the splines prevents significant axial or radial movement during torque transmission, resulting in improved efficiency and precision in mechanical systems.
In summary, the advantages of using spline shafts in mechanical systems include efficient torque transmission, accommodation of relative movement, load distribution, precise positioning and control, interchangeability, high power transmission capacity, versatility, and reduced slippage and backlash. These advantages make spline shafts a reliable and effective choice in various applications where power transfer, flexibility, and precise motion control are essential.
editor by CX 2023-12-06
China best Linear Guide Slides Heavy Duty Spline Shaft Ball Screw for Laser Cutting Machine front drive shaft
Product Description
China SFU1605 rolled ball screws 12mm lead screw for cnc machine
Product Description
Specification:
|
Product Name |
Ball Screw |
|
Material |
Bearing steel, Gcr15 |
|
Precision |
C7,C5 |
|
Width |
4mm-100mm |
|
Length |
100mm-4000mm |
|
Advantage |
High precision, high speed, long life, high reliability, low noise |
|
Packing |
wooden box or according to customers’ demands |
Packaging & Shipping
Packaging Details:
1)Sample order packing by paper carton for saving freight charge;
2)bulk order sent by sea will be packed by film and wooden carton.
3) as customer’s requirements.
Company Profile
Company Information:
ZheJiang Sair Mechanical Xihu (West Lake) Dis. Co., Ltd is located at Xihu (West Lake) Dis. industrial zone Xihu (West Lake) Dis. County which is the beautiful Xihu (West Lake) Dis.
Water City and the famous painting and calligraphy village.The south is national road 308, the west is the national highway 105,
the north is HangZhou-HangZhou highway, so the position is very superior. It is 1 of the biggest linear manufacturers in China.
Certifications
FAQ
1. Q: How about the quality of your product?
A: 100% inspection during production.
Our products are certified to ISO9001-2008 international quality standards.
2. Q: What’s the delivery time?
A: For custom order, within 2000 meters,
Production time is 15days after confirmed every details.
3. Q: What’s your packing?
A: Our Normal packing is bulking in PE bag, and then into plywood Cartons.
We also can pack products according to your requirement.
4. Q: What about the warranty?
A: We are very confident in our products,
and we pack them very well to make sure the goods in well protection.
5.Q: Could you send me your catalogue and price list?
A: As we have more than hundreds of products,
it is really too hard to send all of catalogue and price list for you.
Please inform us the style you interested, we can offer the pricelist for your reference.
6.Q:There are a lot of companies which export bearings, why do you choose us?
A: As we are a genuine linear guide supplier since 2011.and we are really factory, you need not pay the profit for middlemen.
so we can offer you the lowest and competitive price .
Thanks for your valuable time !
| Precision: | C5 |
|---|---|
| Screw Diameter: | 12mm-60mm |
| Flange: | With Flange |
| Samples: |
US$ 15/Piece
1 Piece(Min.Order) | Order Sample |
|---|
| Customization: |
Available
| Customized Request |
|---|
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|
Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
|---|
| Payment Method: |
|
|---|---|
|
Initial Payment Full Payment |
| Currency: | US$ |
|---|
| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
|---|
How to Calculate Stiffness, Centering Force, Wear and Fatigue Failure of Spline Couplings
There are various types of spline couplings. These couplings have several important properties. These properties are: Stiffness, Involute splines, Misalignment, Wear and fatigue failure. To understand how these characteristics relate to spline couplings, read this article. It will give you the necessary knowledge to determine which type of coupling best suits your needs. Keeping in mind that spline couplings are usually spherical in shape, they are made of steel.
Involute splines
An effective side interference condition minimizes gear misalignment. When two splines are coupled with no spline misalignment, the maximum tensile root stress shifts to the left by five mm. A linear lead variation, which results from multiple connections along the length of the spline contact, increases the effective clearance or interference by a given percentage. This type of misalignment is undesirable for coupling high-speed equipment.
Involute splines are often used in gearboxes. These splines transmit high torque, and are better able to distribute load among multiple teeth throughout the coupling circumference. The involute profile and lead errors are related to the spacing between spline teeth and keyways. For coupling applications, industry practices use splines with 25 to fifty-percent of spline teeth engaged. This load distribution is more uniform than that of conventional single-key couplings.
To determine the optimal tooth engagement for an involved spline coupling, Xiangzhen Xue and colleagues used a computer model to simulate the stress applied to the splines. The results from this study showed that a “permissible” Ruiz parameter should be used in coupling. By predicting the amount of wear and tear on a crowned spline, the researchers could accurately predict how much damage the components will sustain during the coupling process.
There are several ways to determine the optimal pressure angle for an involute spline. Involute splines are commonly measured using a pressure angle of 30 degrees. Similar to gears, involute splines are typically tested through a measurement over pins. This involves inserting specific-sized wires between gear teeth and measuring the distance between them. This method can tell whether the gear has a proper tooth profile.
The spline system shown in Figure 1 illustrates a vibration model. This simulation allows the user to understand how involute splines are used in coupling. The vibration model shows four concentrated mass blocks that represent the prime mover, the internal spline, and the load. It is important to note that the meshing deformation function represents the forces acting on these three components.
Stiffness of coupling
The calculation of stiffness of a spline coupling involves the measurement of its tooth engagement. In the following, we analyze the stiffness of a spline coupling with various types of teeth using two different methods. Direct inversion and blockwise inversion both reduce CPU time for stiffness calculation. However, they require evaluation submatrices. Here, we discuss the differences between these two methods.
The analytical model for spline couplings is derived in the second section. In the third section, the calculation process is explained in detail. We then validate this model against the FE method. Finally, we discuss the influence of stiffness nonlinearity on the rotor dynamics. Finally, we discuss the advantages and disadvantages of each method. We present a simple yet effective method for estimating the lateral stiffness of spline couplings.
The numerical calculation of the spline coupling is based on the semi-analytical spline load distribution model. This method involves refined contact grids and updating the compliance matrix at each iteration. Hence, it consumes significant computational time. Further, it is difficult to apply this method to the dynamic analysis of a rotor. This method has its own limitations and should be used only when the spline coupling is fully investigated.
The meshing force is the force generated by a misaligned spline coupling. It is related to the spline thickness and the transmitting torque of the rotor. The meshing force is also related to the dynamic vibration displacement. The result obtained from the meshing force analysis is given in Figures 7, 8, and 9.
The analysis presented in this paper aims to investigate the stiffness of spline couplings with a misaligned spline. Although the results of previous studies were accurate, some issues remained. For example, the misalignment of the spline may cause contact damages. The aim of this article is to investigate the problems associated with misaligned spline couplings and propose an analytical approach for estimating the contact pressure in a spline connection. We also compare our results to those obtained by pure numerical approaches.
Misalignment
To determine the centering force, the effective pressure angle must be known. Using the effective pressure angle, the centering force is calculated based on the maximum axial and radial loads and updated Dudley misalignment factors. The centering force is the maximum axial force that can be transmitted by friction. Several published misalignment factors are also included in the calculation. A new method is presented in this paper that considers the cam effect in the normal force.
In this new method, the stiffness along the spline joint can be integrated to obtain a global stiffness that is applicable to torsional vibration analysis. The stiffness of bearings can also be calculated at given levels of misalignment, allowing for accurate estimation of bearing dimensions. It is advisable to check the stiffness of bearings at all times to ensure that they are properly sized and aligned.
A misalignment in a spline coupling can result in wear or even failure. This is caused by an incorrectly aligned pitch profile. This problem is often overlooked, as the teeth are in contact throughout the involute profile. This causes the load to not be evenly distributed along the contact line. Consequently, it is important to consider the effect of misalignment on the contact force on the teeth of the spline coupling.
The centre of the male spline in Figure 2 is superposed on the female spline. The alignment meshing distances are also identical. Hence, the meshing force curves will change according to the dynamic vibration displacement. It is necessary to know the parameters of a spline coupling before implementing it. In this paper, the model for misalignment is presented for spline couplings and the related parameters.
Using a self-made spline coupling test rig, the effects of misalignment on a spline coupling are studied. In contrast to the typical spline coupling, misalignment in a spline coupling causes fretting wear at a specific position on the tooth surface. This is a leading cause of failure in these types of couplings.
Wear and fatigue failure
The failure of a spline coupling due to wear and fatigue is determined by the first occurrence of tooth wear and shaft misalignment. Standard design methods do not account for wear damage and assess the fatigue life with big approximations. Experimental investigations have been conducted to assess wear and fatigue damage in spline couplings. The tests were conducted on a dedicated test rig and special device connected to a standard fatigue machine. The working parameters such as torque, misalignment angle, and axial distance have been varied in order to measure fatigue damage. Over dimensioning has also been assessed.
During fatigue and wear, mechanical sliding takes place between the external and internal splines and results in catastrophic failure. The lack of literature on the wear and fatigue of spline couplings in aero-engines may be due to the lack of data on the coupling’s application. Wear and fatigue failure in splines depends on a number of factors, including the material pair, geometry, and lubrication conditions.
The analysis of spline couplings shows that over-dimensioning is common and leads to different damages in the system. Some of the major damages are wear, fretting, corrosion, and teeth fatigue. Noise problems have also been observed in industrial settings. However, it is difficult to evaluate the contact behavior of spline couplings, and numerical simulations are often hampered by the use of specific codes and the boundary element method.
The failure of a spline gear coupling was caused by fatigue, and the fracture initiated at the bottom corner radius of the keyway. The keyway and splines had been overloaded beyond their yield strength, and significant yielding was observed in the spline gear teeth. A fracture ring of non-standard alloy steel exhibited a sharp corner radius, which was a significant stress raiser.
Several components were studied to determine their life span. These components include the spline shaft, the sealing bolt, and the graphite ring. Each of these components has its own set of design parameters. However, there are similarities in the distributions of these components. Wear and fatigue failure of spline couplings can be attributed to a combination of the three factors. A failure mode is often defined as a non-linear distribution of stresses and strains.
editor by CX 2023-11-24
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Applications of Spline Couplings
A spline coupling is a highly effective means of connecting two or more components. These types of couplings are very efficient, as they combine linear motion with rotation, and their efficiency makes them a desirable choice in numerous applications. Read on to learn more about the main characteristics and applications of spline couplings. You will also be able to determine the predicted operation and wear. You can easily design your own couplings by following the steps outlined below.
Optimal design
The spline coupling plays an important role in transmitting torque. It consists of a hub and a shaft with splines that are in surface contact without relative motion. Because they are connected, their angular velocity is the same. The splines can be designed with any profile that minimizes friction. Because they are in contact with each other, the load is not evenly distributed, concentrating on a small area, which can deform the hub surface.
Optimal spline coupling design takes into account several factors, including weight, material characteristics, and performance requirements. In the aeronautics industry, weight is an important design factor. S.A.E. and ANSI tables do not account for weight when calculating the performance requirements of spline couplings. Another critical factor is space. Spline couplings may need to fit in tight spaces, or they may be subject to other configuration constraints.
Optimal design of spline couplers may be characterized by an odd number of teeth. However, this is not always the case. If the external spline’s outer diameter exceeds a certain threshold, the optimal spline coupling model may not be an optimal choice for this application. To optimize a spline coupling for a specific application, the user may need to consider the sizing method that is most appropriate for their application.
Once a design is generated, the next step is to test the resulting spline coupling. The system must check for any design constraints and validate that it can be produced using modern manufacturing techniques. The resulting spline coupling model is then exported to an optimisation tool for further analysis. The method enables a designer to easily manipulate the design of a spline coupling and reduce its weight.
The spline coupling model 20 includes the major structural features of a spline coupling. A product model software program 10 stores default values for each of the spline coupling’s specifications. The resulting spline model is then calculated in accordance with the algorithm used in the present invention. The software allows the designer to enter the spline coupling’s radii, thickness, and orientation.
Characteristics
An important aspect of aero-engine splines is the load distribution among the teeth. The researchers have performed experimental tests and have analyzed the effect of lubrication conditions on the coupling behavior. Then, they devised a theoretical model using a Ruiz parameter to simulate the actual working conditions of spline couplings. This model explains the wear damage caused by the spline couplings by considering the influence of friction, misalignment, and other conditions that are relevant to the splines’ performance.
In order to design a spline coupling, the user first inputs the design criteria for sizing load carrying sections, including the external spline 40 of the spline coupling model 30. Then, the user specifies torque margin performance requirement specifications, such as the yield limit, plastic buckling, and creep buckling. The software program then automatically calculates the size and configuration of the load carrying sections and the shaft. These specifications are then entered into the model software program 10 as specification values.
Various spline coupling configuration specifications are input on the GUI screen 80. The software program 10 then generates a spline coupling model by storing default values for the various specifications. The user then can manipulate the spline coupling model by modifying its various specifications. The final result will be a computer-aided design that enables designers to optimize spline couplings based on their performance and design specifications.
The spline coupling model software program continually evaluates the validity of spline coupling models for a particular application. For example, if a user enters a data value signal corresponding to a parameter signal, the software compares the value of the signal entered to the corresponding value in the knowledge base. If the values are outside the specifications, a warning message is displayed. Once this comparison is completed, the spline coupling model software program outputs a report with the results.
Various spline coupling design factors include weight, material properties, and performance requirements. Weight is one of the most important design factors, particularly in the aeronautics field. ANSI and S.A.E. tables do not consider these factors when calculating the load characteristics of spline couplings. Other design requirements may also restrict the configuration of a spline coupling.
Applications
Spline couplings are a type of mechanical joint that connects two rotating shafts. Its two parts engage teeth that transfer load. Although splines are commonly over-dimensioned, they are still prone to fatigue and static behavior. These properties also make them prone to wear and tear. Therefore, proper design and selection are vital to minimize wear and tear on splines. There are many applications of spline couplings.
A key design is based on the size of the shaft being joined. This allows for the proper spacing of the keys. A novel method of hobbing allows for the formation of tapered bases without interference, and the root of the keys is concentric with the axis. These features enable for high production rates. Various applications of spline couplings can be found in various industries. To learn more, read on.
FE based methodology can predict the wear rate of spline couplings by including the evolution of the coefficient of friction. This method can predict fretting wear from simple round-on-flat geometry, and has been calibrated with experimental data. The predicted wear rate is reasonable compared to the experimental data. Friction evolution in spline couplings depends on the spline geometry. It is also crucial to consider the lubrication condition of the splines.
Using a spline coupling reduces backlash and ensures proper alignment of mated components. The shaft’s splined tooth form transfers rotation from the splined shaft to the internal splined member, which may be a gear or other rotary device. A spline coupling’s root strength and torque requirements determine the type of spline coupling that should be used.
The spline root is usually flat and has a crown on one side. The crowned spline has a symmetrical crown at the centerline of the face-width of the spline. As the spline length decreases toward the ends, the teeth are becoming thinner. The tooth diameter is measured in pitch. This means that the male spline has a flat root and a crowned spline.
Predictability
Spindle couplings are used in rotating machinery to connect two shafts. They are composed of two parts with teeth that engage each other and transfer load. Spline couplings are commonly over-dimensioned and are prone to static and fatigue behavior. Wear phenomena are also a common problem with splines. To address these issues, it is essential to understand the behavior and predictability of these couplings.
Dynamic behavior of spline-rotor couplings is often unclear, particularly if the system is not integrated with the rotor. For example, when a misalignment is not present, the main response frequency is one X-rotating speed. As the misalignment increases, the system starts to vibrate in complex ways. Furthermore, as the shaft orbits depart from the origin, the magnitudes of all the frequencies increase. Thus, research results are useful in determining proper design and troubleshooting of rotor systems.
The model of misaligned spline couplings can be obtained by analyzing the stress-compression relationships between two spline pairs. The meshing force model of splines is a function of the system mass, transmitting torque, and dynamic vibration displacement. This model holds when the dynamic vibration displacement is small. Besides, the CZPT stepping integration method is stable and has high efficiency.
The slip distributions are a function of the state of lubrication, coefficient of friction, and loading cycles. The predicted wear depths are well within the range of measured values. These predictions are based on the slip distributions. The methodology predicts increased wear under lightly lubricated conditions, but not under added lubrication. The lubrication condition and coefficient of friction are the key factors determining the wear behavior of splines.
editor by czh 2023-02-24