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How to ensure the stability of the connection between the hub and the driven disc
To ensure the stable connection between the hub and the driven disk, it is necessary to comprehensively consider structural design, material selection, assembly process and dynamic compensation mechanism. The specific measures are as follows:
I. Structural Design Optimization of
Riveting clamping reinforced body integration
The hub is embedded into the driven disc body through a torsional shock absorber and fixed with high-strength rivets to form a rigid whole to resist torque deformation. The spring damping system in the torsional shock absorber can absorb transmission shock and reduce the risk of fatigue damage to the connecting parts .
High-precision splines in combination with
Involute splines (30° pressure Angle) provide excellent centering ability (±0.01mm), with low stress concentration at the tooth root, and are suitable for frequent sliding conditions .
The spline groove precisely meshes with the input shaft of the transmission to ensure the coaxial accuracy of power transmission and avoid eccentric vibration .
Ii. Youdaoplaceholder0 Materials and Manufacturing Process Control
Application of wear-resistant materials
The friction plates are made of highly wear-resistant composite materials, and the disc hub is selected from high-strength alloy steel to enhance the shear resistance and deformation resistance .
Machining accuracy guarantee
The spline tooth surface is hardened, with a surface roughness of ≤Ra 0.8μm, reducing friction loss. The height tolerance of the hub is strictly controlled within ±0.1mm to ensure the reliability of separation/connection .
Iii. Key Points of Assembly Process
Cleaning and centering
Before installation, thoroughly clean the contact surface to remove oil stains and rust, and ensure that the contact surface between the hub and the driven disk is free of impurities interfering .
Use a dedicated fixture to ensure the initial alignment of the splines with the input shaft to avoid forced assembly causing eccentric wear .
Torque graded fastening
The rivets are tightened in a diagonal sequence, with the torque increasing in three stages (e.g., 30%→60%→100%), and the final torque strictly matches the design value (reference: for heavy-duty machinery, it is usually 120-150 N·m) .
Anti-loosening measures
Apply anti-loosening glue (such as Loctite 243) to the threaded parts, or adopt a double-nut locking structure to suppress the attenuation of preload force caused by vibration.
4. Enhanced dynamic stability of
Torsion shock absorber calibration
Optimize the stiffness and damping coefficient of the vibration damping spring to deviate the system's resonant frequency from the commonly used speed range of the engine and avoid resonant amplification .
Thermal stability management
Heat dissipation fins are added to the pressure plate or aluminum alloy material is used to reduce the influence of thermal deformation on the clamping force of the plate hub .
Stability verification standard
Project compliance requirements
Static clamping force no microscopic cracks after riveting, and the gap of the clamping surface is ≤0.05mm
Spline fit clearance axial sliding resistance 5-10 N·m, no jamming
Fatigue life without loosening after 10⁷ torque alternating tests
Regularly check the wear of the splines (replace if it exceeds 10% of the tooth thickness) and the preload of the rivets, and adjust the maintenance cycle in combination with the working conditions.
v
How to ensure the stability of the connection between the hub and the driven disc
To ensure the stable connection between the hub and the driven disk, it is necessary to comprehensively consider structural design, material selection, assembly process and dynamic compensation mechanism. The specific measures are as follows:
I. Structural Design Optimization of
Riveting clamping reinforced body integration
The hub is embedded into the driven disc body through a torsional shock absorber and fixed with high-strength rivets to form a rigid whole to resist torque deformation. The spring damping system in the torsional shock absorber can absorb transmission shock and reduce the risk of fatigue damage to the connecting parts .
High-precision splines in combination with
Involute splines (30° pressure Angle) provide excellent centering ability (±0.01mm), with low stress concentration at the tooth root, and are suitable for frequent sliding conditions .
The spline groove precisely meshes with the input shaft of the transmission to ensure the coaxial accuracy of power transmission and avoid eccentric vibration .
Ii. Youdaoplaceholder0 Materials and Manufacturing Process Control
Application of wear-resistant materials
The friction plates are made of highly wear-resistant composite materials, and the disc hub is selected from high-strength alloy steel to enhance the shear resistance and deformation resistance .
Machining accuracy guarantee
The spline tooth surface is hardened, with a surface roughness of ≤Ra 0.8μm, reducing friction loss. The height tolerance of the hub is strictly controlled within ±0.1mm to ensure the reliability of separation/connection .
Iii. Key Points of Assembly Process
Cleaning and centering
Before installation, thoroughly clean the contact surface to remove oil stains and rust, and ensure that the contact surface between the hub and the driven disk is free of impurities interfering .
Use a dedicated fixture to ensure the initial alignment of the splines with the input shaft to avoid forced assembly causing eccentric wear .
Torque graded fastening
The rivets are tightened in a diagonal sequence, with the torque increasing in three stages (e.g., 30%→60%→100%), and the final torque strictly matches the design value (reference: for heavy-duty machinery, it is usually 120-150 N·m) .
Anti-loosening measures
Apply anti-loosening glue (such as Loctite 243) to the threaded parts, or adopt a double-nut locking structure to suppress the attenuation of preload force caused by vibration.
4. Enhanced dynamic stability of
Torsion shock absorber calibration
Optimize the stiffness and damping coefficient of the vibration damping spring to deviate the system's resonant frequency from the commonly used speed range of the engine and avoid resonant amplification .
Thermal stability management
Heat dissipation fins are added to the pressure plate or aluminum alloy material is used to reduce the influence of thermal deformation on the clamping force of the plate hub .
Stability verification standard
Project compliance requirements
Static clamping force no microscopic cracks after riveting, and the gap of the clamping surface is ≤0.05mm
Spline fit clearance axial sliding resistance 5-10 N·m, no jamming
Fatigue life without loosening after 10⁷ torque alternating tests
Regularly check the wear of the splines (replace if it exceeds 10% of the tooth thickness) and the preload of the rivets, and adjust the maintenance cycle in combination with the working conditions.
