BLEY2715-5133-0.75KW (cycloidal pinwheel reducer) internal impurities mainly enter through two major ways: external intrusion and internal generation. The following are the specific paths:
1. External intrusion (the most important way)
1. Ventilation/breathing equipment (ventilation cap/respirator)
When the reducer is running, the internal pressure changes and exchanges with outside air through the ventilation cap. Dust, water vapor, and tiny particles enter directly with the air.
The ventilation cap filter is damaged, missing, or blocked, and the protection fails.
2. Shaft end seal failure (input/output shaft oil seal)
The skeleton oil seal is aged and hardened, the lip is damaged, and the installation is skewed. Dust, water vapor, and external oil seep into the gap between the shaft and the oil seal.
The journal is worn and scratched, damaging the sealing mating surface.
3. Box joint surface and sealing defects
The seals on the upper and lower boxes, end covers, observation holes, etc. are aged, damaged, or missing, or the sealant is unevenly applied and has gaps.
The joint surface of the box is not processed with sufficient accuracy and is damaged by knocks, forming a leakage channel.
4. Entrance related to lubrication system
Filling port and oil drain port: When changing or replenishing oil, impurities may enter with the oil if the tools are dirty, the oil contains impurities, and the operating environment is poor.
The oil level gauge and liquid level window are not tightly sealed, allowing external impurities to penetrate.
5. Other gaps and weak points of protection
Loose fasteners and poor sealing of threaded holes create tiny channels.
The equipment protective cover is missing or damaged, and metal shavings, sand, and fibers in the environment directly invade.
2. Internal generation (secondary pollution)
1. Debris generated by parts wear
Normal wear, fatigue peeling, and gluing of components such as cycloid wheels, pin teeth, bearings, and shafts produce metal iron filings and abrasive particles.
The bearing raceways and rolling elements are broken, forming large particles of foreign matter.
2. Assembly/repair residual impurities
The parts were not cleaned thoroughly when assembled at the factory, leaving residual processing burrs, iron filings, welding slag, and sealant.
During maintenance, the tools are dirty, the parts are not clean, and foreign matter (such as gasket fragments, bolts, lint) is brought into the assembly.
3. Lubricating medium deterioration products
Lubricating oil oxidizes, ages, and emulsifies, producing sludge, colloid, and acidic substances, forming internal impurities.
