The detection methods for output shaft bending of cycloid reducer mainly include dial indicator measurement method, micrometer measurement method, visual inspection method and vibration analysis method. Among them, dial indicator measurement method is the most accurate and commonly used.
1. Visual inspection method: Place the output shaft on a flat surface and observe whether the surface is flat or whether there is a height difference at both ends. Significant unevenness or tilt may indicate that the shaft is bent. This method is simple to operate, but has low accuracy and is suitable for preliminary judgment.
Preparation work: Clean the surface of the output shaft to a metallic luster, place it on a V-shaped iron or special bracket, and ensure that the axial movement is controlled within 0.10mm;
Install the dial indicator: Fix the dial indicator on the bracket, and align the contacts vertically with the middle position of the shaft;
Measurement process: Rotate the shaft slowly and record the maximum and minimum readings of the dial indicator. Half of the difference between the two is the curvature;
Judgment criteria: It is generally required that the curvature of the output shaft of the cycloidal pinwheel reducer is less than 0.2mm. If it exceeds, it needs to be straightened or replaced.
3. Micrometer measurement method: Use micrometers to measure the diameter at different positions of the shaft. If there are significant differences in the data at multiple points, it indicates that there may be bending. This method requires multi-point sampling and is suitable for auxiliary verification.
4. Vibration analysis method: In the running state, a vibration sensor is installed on the output shaft to collect signals. If there is an obvious frequency component of 1 times the rotational speed in the spectrum, it can be judged that the shaft is bent. This method relies on professional equipment, but has high accuracy and is suitable for online monitoring and fault diagnosis.
In addition, according to industry maintenance standards, when the straightness error of the shaft is greater than 0.1mm/m, it should also be corrected or replaced to ensure stable operation of the equipment.
