What Problems Affect the Internal Gear Transmission System of CJY Series Reducers?

Fault diagnosis and troubleshooting for the internal gear transmission system of CJY series reducers are implemented in a targeted manner according to specific fault types. Combined with common on-site operating issues, the typical fault causes and standardized solutions are summarized as follows:

1. Gear Wear and Fatigue Fracture

Fault Causes: Fatigue cracks initiate and propagate at gear tooth roots under cyclic alternating loads, eventually resulting in gear fracture. Moreover, short-term overload or sudden impact loads can also cause direct tooth fracture and abrasive wear. Solutions:

1. Optimize the tooth root structure by increasing the transition fillet radius to reduce stress concentration;
2. Improve the rigidity of shafts and supporting components to relieve local and eccentric load concentration;
3. Perform tooth root strengthening treatments such as shot peening to enhance fatigue resistance;
4. Adopt qualified gear materials and ensure the heat treatment hardness meets technical standards.

2. Gear Pitting and Spalling

Fault Causes: Low contact fatigue strength of tooth surfaces is the core cause. During continuous meshing, lubricant invades micro cracks and expands under cyclic pressure, leading to surface metal peeling and pitting defects. Solutions:

1. Improve gear machining and assembly precision to guarantee standard meshing clearance and stable operation;
2. Apply high-quality lubricating oil and keep the lubrication system clean to avoid impurity-induced surface damage;
3. Conduct full flaw detection on gear surfaces and interiors to eliminate inherent material and processing defects.

3. Abnormal Vibration and Noise

Fault Causes: Common triggers include foreign matter jamming in meshing areas, bearing damage, excessive coaxiality error, loose connecting bolts, and contaminated lubricating oil. Solutions:

1. Disassemble and clean internal foreign matters, and replace damaged and failed components timely;
2. Calibrate the alignment between the motor and reducer to eliminate installation deviation;
3. Fasten connecting bolts and conduct regular inspection of assembly conditions.

4. Abnormal Heating

Fault Causes: Abnormal temperature rise is mainly induced by overload operation, bearing wear, frequent start-stop operation, voltage instability and poor lubrication. Solutions:

1. Limit operating load within the rated range to avoid long-term overload service;
2. Replace lubricating oil regularly to ensure unobstructed oil circulation and effective heat dissipation;
3. Inspect bearing installation status routinely and replace worn parts in a timely manner.

5. Oil Leakage Fault

Fault Causes: Oil leakage that impairs internal transmission performance results from damaged seals, deformed reducer housing, and oil thinning caused by excessive operating temperature. Solutions:

1. Inspect and replace aging or damaged sealing components;
2. Strengthen heat dissipation to avoid excessive oil temperature rise and oil viscosity reduction;
3. Repair or replace deformed reducer housing to ensure fitting tightness.