What are the reasons why the oil temperature of the worm gear box of WPWDKS200-60-A reducer is too high?

As the core component of the mechanical transmission system, the reducer's operating status directly affects the stability of the equipment. In practical applications of WPWDKS200-60-A worm gear reducer, abnormal increase in oil temperature is a common fault phenomenon. This article will analyze the root causes of excessive oil temperature from multiple dimensions such as design, use, and maintenance.

1. Failure of the lubrication system is the primary cause
1. Improper lubricating oil
- inconsistent viscosity grade (such as misuse of ISO VG320 to replace the required VG460)
- insufficient extreme pressure additive content causing oil film rupture
- poor oxidation stability of the base oil (actual test cases show that the acid value of inferior oil exceeds the standard by 3 times after 2000 hours of use)

2. Defects in lubrication methods
- The oil level of the splash lubrication system is lower than the worm immersion requirement (the standard should be immersed 1/3 of the tooth height)
- The flow of the forced lubrication system is insufficient (actually measured normal requirement is ≥8L/min)
- The oil circuit is blocked causing uneven distribution (a case of a cement plant shows that 40% of the lubrication points are interrupted in oil supply)

2. Temperature rise caused by abnormal mechanical load
1. Instantaneous overload operation
- the temperature rise curve increases exponentially when the rated torque is exceeded by 15%
- impact load causes instantaneous friction heat accumulation (the measured peak temperature can reach 120°C)

2. Assembly accuracy deviation
- the efficiency drops by 12% when the center distance error of the worm gear pair is >0.05mm
- excessive bearing preload causes additional friction (one case shows a temperature drop of 18°C after adjustment)

3. Insufficient cooling system efficiency
1. Cooling design flaws
- the natural cooling model is forcibly transformed into a closed box (the heat dissipation area is reduced by 60%)
- the air volume of the forced air cooling system is insufficient (requires ≥200m³/h)

2. Impact of environmental factors
- Dust adheres to the heat sink (1mm dust layer reduces heat exchange efficiency by 35%)
- Additional cooling measures are required when the ambient temperature exceeds 40°C.

4. Material and manufacturing process issues
1. The worm gear material is not up to standard
- Tin bronze ZCuSn10P1 impurity content exceeds the standard (a test shows that the Pb content reaches 0.25%)
- Thermal conductivity deteriorates when the centrifugal casting porosity is >3%

2. Surface treatment defects
- The depth of the worm hardened layer is insufficient (required ≥1.2mm)
- the running-in process is not standardized, resulting in microscopic bumps (roughness Ra>0.8μm)

5. Omissions in maintenance and management
1. The oil replacement cycle exceeds the standard
- the 2000-hour oil change standard is not implemented under heavy load conditions
- the filter element clogging alarm is not handled in time (the flow rate is attenuated by 40% when the measured pressure difference is >0.3MPa)

2. The status monitoring is missing
- the online temperature sensor is not installed (it is recommended to set an 85°C early warning value)
- the vibration monitoring interval is >3 months (weekly inspection is recommended)