What are the common faults of the 2CY gear pump?

The 2CY gear pump is suitable for conveying various lubricating liquids, with a temperature not exceeding 70 ℃. If a high temperature of 200 ℃ is required, materials can be used. This pump is not suitable for conveying corrosive, hard particle or fiber containing, highly volatile or low flash point liquids, such as gasoline, benzene, etc

Fault Analysis of 2CY Gear Pump

▼ Oil seal wear, rubber oil seal aging and deterioration of the unloading plate, loss of elasticity, loss of sealing and isolation effect on the high-pressure oil chamber and low-pressure oil chamber, causing oil pressure from the high-pressure oil chamber to flow into the low-pressure oil chamber, known as "internal leakage", which reduces the working pressure and flow rate of 2CY gear pump.

. The normal working pressure of the 2CY gear pump is 100-110kg/square centimeter, the normal oil delivery rate is 46L/min, and the standard unloading plate rubber oil seal is 57 × 43. The self tightening oil seal is a PG25 × 42 × 10 skeleton oil seal. If it is damaged or fails for a long time, air will be sucked into the 2CY gear pump through the gap between the oil seal and the main shaft journal or from the joint between the oil inlet adapter and the 2CY gear pump housing. It will enter the oil tank through the return oil pipe and generate a large amount of bubbles in the oil tank. It will cause a decrease in oil in the tank and an increase in oil in the engine oil pan, resulting in slow or ineffective lifting of agricultural tools. Replacing the oil seal can eliminate this fault

The wear of internal parts in 2CY gear pump can cause internal leakage. The large leakage area between the floating shaft sleeve and the gear end face is the main cause of internal leakage. This part of the leakage accounts for about 50% to 70% of the total internal leakage. The volumetric efficiency of gear pumps with wear and internal leakage decreases, and the output power of 2CY gear pumps is lower than the input power. All of its losses are converted into thermal energy, which can cause overheating of the 2CY gear pump. If the joint plane is pressed tightly, the floating shaft sleeve will have a slight movement during operation, causing wear and tear, resulting in slow or ineffective lifting of agricultural tools. Such floating shaft sleeves can be replaced or repaired

▼ 2CY gear pump has insufficient oil supply or no oil pressure phenomenon: the working device lifts slowly, shakes or cannot lift during lifting; There are bubbles in the fuel tank or oil pipe; When lifting, the hydraulic system emits a "chirp" sound; When the tractor is first started, the working device can be lifted. After working for a period of time and the oil temperature rises, the lifting is slow or cannot be lifted; It can be lifted under light loads, but cannot be lifted under heavy loads

The wear of the 2CY gear pump housing is mainly caused by the wear of the floating shaft sleeve hole (the normal clearance between the gear shaft and the shaft sleeve is 0.09-0.175mm, which should not exceed 0.20mm). The gear works under the pressure of oil, and the gear tip is close to the 2CY gear pump housing, causing wear on the low-pressure chamber of the pump body