How to solve the fault problem of the internal gear transmission system of CJY series reducer

To solve the fault of the internal gear transmission system of CJY series reducer, corresponding measures should be taken according to the specific fault type. According to the frequently asked questions, the core solutions are as follows:

1. ‌Gear wear or fatigue fracture‌

‌Cause of wear‌: Alternating loads cause fatigue cracks in the tooth root to expand and eventually break; or breakage occurs due to short-term overload or impact load.

‌Solution to Gear Wear‌:

(1) Increase the tooth root transition fillet radius to reduce stress concentration;

(2) Increase the stiffness of the shaft and support to ease local loads;

(3) Strengthen the tooth root (such as shot peening);

(4) Ensure that the gear material meets the requirements and the hardness reaches the standard after heat treatment.

2. ‌Gear pitting and spalling‌

Cause of pitting corrosion: Insufficient contact fatigue strength, lubricating oil enters micro-cracks and expands during repeated meshing, causing the metal block to peel off.

Pitting Corrosion Solution‌:

(1) Improve gear processing accuracy and assembly accuracy to ensure normal meshing;

(2) Use high-quality lubricating oil and keep it clean to avoid impurities that accelerate damage;

(3) Check whether there are defects on the surface and inside of the gear.

3. ‌Abnormal vibration and noise‌

‌Possible causes of abnormal vibration‌: Foreign matter is stuck in the gear meshing part, the bearing is damaged, the coaxiality error is large, the bolts are loose, or the lubricating oil contains impurities.

‌Abnormal vibration solutions‌:

(1) Disassemble, inspect, clean foreign objects, and replace damaged parts;

(2) Correct the alignment between the motor and the reducer;

(3) Tighten the connecting bolts and check the assembly status regularly.

4. ‌Abnormal fever‌

‌Possible causes of abnormal heating‌: overload operation, bearing wear, frequent starts and stops, abnormal voltage or poor lubrication.

‌Solutions to Abnormal Fever‌:

(1) Control the load within the rated range to avoid long-term overload;

(2) Change lubricating oil regularly to ensure smooth oil passage;

(3) Check whether the bearing is installed correctly and replace worn parts in time.