Oil pump is the most widely used component in the lubrication system of machine tools. Compared with the rotor pump, the structure of the gear pump is simple and cheap to manufacture. Gear oil pump has external meshing and internal meshing, the most widely used is the external meshing gear oil pump. Several new structures of gear oil pumps are introduced.
1. External gear oil pump
External gear oil pump has high volumetric efficiency. Its main components are: pump body 1, gear 4, and compensation element 3, sliding bearing 2, 9 and end cover 6. The automatic adjustment of the clearance at both ends of the gear is carried out by compensating element 3, which is made of bronze resistant I'x material. In order to seal each joint, special rubber rubber rubber bowl 5. 0 type rubber seal 7 and rubber sealing ring 7 and rubber reinforced rubber bowl 8 are used. Due to the pressure oil entering the cavity 11, the compensation element is pressed on the gear, and the pressure should ensure reliable sealing, so it can reduce the leakage At between the gear and the compensation element end face. The working volume of this kind of oil pump is generally 32cm3, y mountain pump if l complete force is not greater than 20MPa, the speed is generally 2400r/min o
2. External meshing three-gear oil pump
External meshing three gear oil pump, specially designed to obtain two oil flows. Driving gear 4 and driven gear 3.6 are arranged in pump body 2, and the pump body is covered with end cover 1. Press the bushing into the end cover. 5. Bushing can be used as the sliding bearing of the driving shaft. Drive shaft is integrated with gear 4. In the pump body, a gun (not shown) is fired on the opposite side of the gear entering and disengaging engagement through the tank to inhale oil and pressurize. The working volume of this kind of oil pump is 63cm, the monthly force is not more than 2.5mpa, and the speed is generally 2000r/min
