How to inspect the wear degree of gears in H-series reducers

The inspection of the wear level of the H series reducer gears requires a combination of "on-site intuitive judgment" and "professional quantitative testing". Through multi-dimensional signal comprehensive evaluation, the wear status can be accurately identified without stopping or after stopping the machine. The inspection method for gear wear degree is as follows:

1. On site intuitive judgment (no need to disassemble, suitable for daily inspections)

Quickly identify abnormal signals through "listening, looking, touching, and checking":

(1) Listen: Running noise

Normal: When running smoothly, the noise level is ≤ 85dB (A), with only a slight "uniform meshing sound";

Mild wear and tear: intermittent rustling or high-frequency buzzing, with a noise increase of 5-10dB;

Moderate wear: produces a "periodic impact sound" (once per revolution), which is still noticeable when unloaded;

Severe wear/pitting: "Sharp metal friction sound" or "stuttering sound" occurs, accompanied by vibration amplitude>2.0mm/s.

(2) See: Oil condition

Normal: After 1000 hours of operation, the oil turns light brown;

Mild wear: The oil is dark brown and free of impurities;

Moderate wear: blackened, with trace black sediment at the bottom after standing still;

Heavy wear: dark black, visible metal debris or "metallic luster flocculent matter" to the naked eye.

(3) Touch: Temperature and Vibration

Temperature: Normal box temperature ≤ 65 ℃; Mild wear increases to 65-75 ℃; Severe wear and tear>75 ℃;

Vibration: Fingers have a "tingling sensation" with a vibration amplitude greater than 1.5mm/s, which can be detected by a portable vibration meter.

(4) Check: Output performance

Insufficient torque: The motor current increases by 10% to 20% under the same load;

Speed deviation: The deviation between the measured speed and the theoretical value is greater than ± 1%;

Load fluctuation: The output speed fluctuates rapidly and slowly, with fluctuations greater than ± 0.5%.

2. Professional quantitative testing (requires disassembly)

When suspecting excessive wear, perform the following measurements:

(1) Measurement of tooth thickness and wear

Tools: Common law micrometer (accuracy 0.001mm) or tooth thickness caliper;

Method: Measure the length of the common normal line at four points on the circumference of the gear and take the average value;

Calculation: Wear amount=(New gear normal normal line length - measured value)/2;