4P4020 Engine Oil Pump Fits erpillar 3306 Machinery Spare Parts 8N8635

 
 
4P4020 Engine Oil Pump Fits erpillar 3306 Machinery Spare Parts 8N8635
 
 
Specifiion

 
 
Description
 
The function of the oil pump is to increase the oil to a certain pressure and force it to the moving surfaces of the engine parts. The oil pump structure can be divided into two types: gear type and rotor type. Gear oil pump is divided into internal gear type and external gear type, the latter is generally called gear oil pump. It is used to increase the oil pressure and ensure a certain amount of oil, and force oil supply to each friction surface. The internal combustion engine widely adopts gear type and rotor type oil pump. The gear type oil pump has simple structure, convenient processing, reliable operation and long service life. , The pump oil pressure is high, and it is widely used. The rotor pump has a complex shape and is mostly pressed by powder metallurgy. This pump has the same advantages as a gear pump, but has a compact structure and a small volume.
 
 
Characteristic

1. Small size, light weight, simple structure, and large oil capacity. The structure of the cycloid rotor pump is that the inner and outer rotors are meshed, the number of teeth is small, the structure size is compact, the structure of the sealing cavity is simple, the number of parts used is small, and the cooperation of other isolation elements is not required.

2. Good high-speed characteristics. For the cycloid rotor pump, the oil suction and discharge angle range is large. When rotating at high speed, the centrifugal force is fully utilized to fill the oil in the tooth valley to avoid the unfavorable results caused by the "cavity" phenomenon. Therefore, the rotational speed of the cycloid rotor pump can range from several hundred to nearly ten thousand revolutions. And the general involute gear pump, its rotational speed is mostly within 3000rpm, and the peripheral speed will not exceed 5-6m/s, because if its rotational speed is too high, under the action of centrifugal force, the tooth valley will be insufficiently filled with oil. The phenomenon of "cavitation" is formed, which reduces the efficiency of the pump.

3. Smooth operation and low noise. The number of teeth of the inner and outer rotors of the cycloid rotor pump is not equal, and they differ by one tooth. When they are in relative motion, the mutual wear of the tooth surfaces of the two rotors is small, because the sliding speed of the tooth surfaces is small, and the meshing point continuously moves along the tooth profiles of the inner and outer rotors. In addition, the oil flow and movement are relatively stable, the oil suction and oil discharge time is relatively sufficient, and the noise is much lower than that of the gear pump, which is due to the large envelope angle (close to 145°) of the oil suction cavity and the oil discharge cavity.

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