DCY160-25-IV reducer is a commonly used industrial transmission equipment. To prevent its resonance and structural problems, we can start from multiple stages such as design, manufacturing, installation, operation and maintenance. The specific methods are as follows:
1. Optimize design
Improve box stiffness : Use topology optimization technology to rationally design the box structure, add stiffeners, etc. to increase the natural frequency of the box and keep it away from the excitation frequency. For example, the design of stiffeners follows the T-section principle, and the thickness of the ribs is 0.6-0.8 times the wall thickness.
Select appropriate gears : Use modified gears, such as parabolic drum teeth, to reduce gear meshing impact and reduce vibration excitation. It is also possible to increase the tooth surface contact area and reduce vibration by adjusting micro-geometric parameters such as the pressure angle and helix angle of the gear.
Consider damping characteristics : Consider increasing the damping of the system when designing, such as selecting appropriate lubricating oil, using its viscous damping to absorb vibration energy, or installing dampers in the reducer structure, such as hydraulic dampers, magnetorheological dampers, etc.
2. Control the manufacturing process
Ensure gear processing accuracy : Control gear processing accuracy above level 5 of the ISO 1328-1 standard, and strictly control parameters such as tooth profile error and tooth side clearance to ensure gear meshing quality.
Ensure the quality of bearing assembly : The bearing assembly adopts liquid nitrogen cold assembly process to ensure that the interference is within ±0.002mm, ensuring the installation accuracy and stability of the bearing and avoiding vibration caused by bearing problems.
Perform a dynamic balance test : Perform a dynamic balance test on the rotating parts of the reducer, such as gears, shafts, etc., to ensure that the dynamic balance level reaches the G2.5 level standard and reduce the centrifugal inertia force caused by uneven mass distribution.
3. Precise installation and debugging
Ensure shaft system alignment : Use a laser alignment instrument for installation and debugging, control the radial deviation between the motor and reducer within 0.02mm, and the axial deviation ≤ 0.01mm/m to avoid additional bending moments and vibrations due to shaft system alignment deviation.
Ensure foundation rigidity : The foundation of the reducer should have sufficient rigidity to avoid resonance caused by insufficient foundation rigidity. Methods such as casting an epoxy resin base can be used to increase the natural frequency of the foundation. At the same time, ensure that the pre-tightening force of the anchor bolts is uniform and meets the requirements. The pre-tightening force needs to reach 70%-80% of the yield strength of the bolt material. You can use a hydraulic torque wrench to tighten in three steps.
4. Strengthen operation and maintenance management
Establish a monitoring system : Establish a vibration trend monitoring system, deploy three-axis acceleration sensors, etc., collect vibration data of the reducer in real time, set a reasonable early warning threshold, such as a vibration speed value of 4.5mm/s, and issue a timely warning when the threshold is exceeded.
Regular inspection and maintenance : Regularly check the lubrication condition of the reducer, replace the lubricating oil as required, and control the particle contamination degree of the oil to be within ISO 4406 16/14 level, and the water content is ≤200ppm. At the same time, check the wear of gears, bearings and other components, and replace seriously worn parts in a timely manner.
Optimize operating parameters : According to the actual working conditions, reasonably select the working speed, load and other parameters of the reducer to avoid long-term operation of the reducer under harsh working conditions such as overload and high speed, and reduce the risk of resonance and structural problems.
