The core reasons for the premature failure of the grease of the RX67-2.7-132B5 helical gear reducer can be attributed to the following five categories: Let me break it down for you in detail:improper grease operation, excessive temperature, mechanical shear force, oxidative deterioration, and pollution intrusion .
1. Improper grease Selection
Basic oil type mismatch: For example, ordinary mineral oil is used in high-temperature environments, which oxidizes quickly and has a short life. It is recommended to choose synthetic oil (such as PAO or ester).
Improper consistency: If the speed is high, but too thick fat is used, it is easy to be thrown out; if the speed is low, too thin is used, and it is easy to drain. The consistency grade must be selected according to the equipment operating conditions.
Insufficient additives: Insufficient extreme pressure anti-wear agent, the tooth surface is easy to glue; insufficient antioxidants, the grease deteriorates quickly at high temperatures.
2. The temperature is too high
Friction heat generation: Gear meshing and bearing friction will increase the temperature. After the base oil evaporates, the grease becomes hard and the lubrication performance decreases.
Environmental high temperature: For example, in equipment near metallurgical furnaces, if the temperature exceeds 120°C, oxidation will be accelerated and the life of the grease will be directly halved.
3. Mechanical shearing force
Bearing centrifugal force: At high speeds, grease may be thrown out of the bearing, causing oil loss and grease hardening.
Gear meshing shear: When gears with hard tooth surfaces mesh, the grease structure is easily damaged, softened, oiled, and eventually failed.
4. Oxidative deterioration
Reacts with air: Lipids generate acidic substances after oxidation, which corrode metals, destroy structures, drop the dropping point, and deteriorate fluidity.
High-temperature catalysis: For every 15°C increase in temperature, the grease life may be halved. For example, at 90°C, the lifespan is approximately halved.
5. Intrusion of pollution
Metal wear debris: Metal particles produced by gear and bearing wear will catalyze oxidation and accelerate grease failure.
Moisture and dust: In a humid environment or poor sealing, moisture and dust mix in, causing fat to emulsify and deteriorate.
Summary: Grease failure is the result of a variety of factors, which must be considered comprehensively in practical applications. If you have more specific working conditions or data, I can help you further refine the analysis.
