What should I pay attention to when adding lubricating oil for different types of cycloid pin wheel reducers?

Special precautions for different types of cycloid pinwheel reducers

According to the differences in installation methods and structural characteristics, the refueling details need to be adjusted in a targeted manner to avoid adaptation problems caused by 'general operations':

1. Horizontal cycloid pinwheel reducer (most common, such as X and B series)

The fuel tank of the horizontal model is 'side-mounted', and the oil level is greatly affected by the installation level.

Core attention

'Horizontality matches oil level':

• Installation level check : Before refueling, you need to use a level to check the level of the fuselage (required ≤0.1mm/m). If the fuselage is tilted (if one side is high and the other side is low), it will cause the oil level in the fuel tank to 'one side is high and one side is low'. The base gasket must be adjusted first to ensure level before refueling;

• Oil outlet anti-blocking : The oil outlet of the horizontal model (connected to a lubricating oil pump) is located at the bottom of the oil tank. If impurities are mixed during refueling, it is easy to block the oil outlet, causing the lubricating system to break oil - It is recommended to run for 5 minutes after refueling and observe the temperature of the bearing seat (no significant temperature rise indicates that the oil passage is unobstructed).

2. Vertical cycloid pin wheel reducer (such as BL, XL series, output shaft vertically downward)

The transmission parts (cycloid wheels, needle teeth) of the vertical model are distributed vertically, and the lubricating oil is easily concentrated at the bottom due to 'gravity' and needs to be focused on solving the problem of 'insufficient lubrication of the upper parts':

• The oil level must be slightly higher than the conventional level : the oil level mirror of the vertical model is marked with 'vertical special oil level line', which is usually 10%-15% higher than that of the horizontal model (such as the highest oil level of the horizontal type is 1/2 of the oil mirror and 2/3 of the vertical type), ensuring that the upper part of the cycloid wheel can fully contact the oil;

• The first operation requires 'jog-injection' : After the new machine is refueled, do not run directly at full capacity. 'jog-in start' 3-5 times (10 seconds each time, 30 seconds apart), so that the lubricant is stirred and splashed upward through the gears, soaking the upper needle teeth and bearings to avoid dry friction during startup;

• Prevent oil leakage : The output shaft seal of the vertical model (such as the skeleton oil seal) is greatly affected by oil pressure, and the oil level cannot exceed the 'highest oil level line' (otherwise, oil leakage is prone to oil leakage at the seal). If oil leakage is found, check whether the oil level exceeds the standard, and then check the wear of the seal.

3. Integrated cycloid pin wheel reducer with motor (such as XWD, BWD series, motor and reducer integrated)

The motor bearings of this type of machine share lubricating oil with the reducer (or independently lubricate, depending on the structure). When refueling, 'take into account both the motor and reducer requirements':

• First distinguish between lubricating structures :

• Shared oil tank type: The motor bearing is soaked in the reducer lubricating oil. When refueling, you only need to add it according to the standard of the reducer oil level (the oil level must cover 1/2 of the inner ring of the motor bearing to ensure the bearing lubrication);

• Independent lubricating type: The motor bearing has a separate fuel port (usually at the end cover of the motor), and gas must be refueled separately - the reducer is conventionally added with gear oil, and the motor bearing is lithium-based grease (No. 2 or No. 3) , and the fueling amount is 1/2-2/3 of the internal space of the bearing (do not fill it up to prevent the bearing from overheating);

• Check the motor simultaneously when changing oil : When changing the reducer lubricant, you need to remove the motor end cover to check whether the bearing grease is deteriorated (such as black or clumped). If it deteriorates, you need to replace it simultaneously to avoid indirectly affecting the operation of the reducer due to motor bearing problems.

4. Explosion-proof cycloid pin wheel reducer (used for flammable and explosive environments, such as chemicals and coal mines)

The addition of lubricating oil in explosion-proof models must strictly comply with the 'Explosion-proof Safety Specifications' to prevent safety accidents caused by oil selection or improper operation:

• Oil products must be 'explosion-proof' : It is prohibited to use lubricating oil with volatile and low flash point. Industrial gear oil with flash point ≥150℃ (such as CKC 220# explosion-proof type), and the oil products must meet the equipment explosion-proof level requirements (such as Ex d IIB T4);

• 'Spark generation' is eliminated when refueling : Refueling tools (such as oil pots, funnels) must be made of copper or anti-static materials, and iron tools are prohibited (avoid sparks caused by collisions); the environment must be kept ventilated during refueling, and smoking or using open flames are prohibited;

• The oil level must be strictly controlled within the 'explosion-proof range' : the upper limit of the oil level of some explosion-proof models is lower than that of conventional models (to prevent oil from overheating and volatilizing, forming a flammable and explosive mixture). It must be added strictly in accordance with the oil level line marked in the equipment instructions and must not exceed the amount.