High pressure gear pump volume increased

Due to the high pressure pump is the volume of the space increases gradually, the gas pressure is reduced, high-pressure gear pump pump at the entrance to the external gas pressure is greater than the pressure within the space of A, so the gas suction. When space A and inspiratory mouth off, B is transferred to the space position, gas to be compressed, the volume gradually narrow, finally and vent are interlinked. Gas space volume is increasing gradually, the pressure is reduced, high-pressure gear pump pump at the entrance to the external gas pressure is greater than the pressure within the space of A, so the gas suction. When space A and inspiratory mouth off, B is transferred to the space position, gas to be compressed, the volume gradually narrow, finally and vent are interlinked. High-pressure gear pump gear pump is one of the most basic vacuum to obtain equipment in vacuum technology. More for small and medium pump gear pump. Gear oil pump has two kinds of single stage and double stage. A two stage, is in the structure will be two single pump series. More commonly make it double, to obtain a high vacuum degree. Gear oil pump of the relationship between pumping speed and inlet pressure regulation is as follows: in the inlet pressure is 1333 Pa, Pa 1.33 and 1.33 x 10-1 (Pa), its pumping speed value shall not be less than 95% of the nominal speed of pump is respectively, 50% and 20%.

Gear oil pump is mainly composed of pump body, rotor, gear, shell cover, a spring, etc. In the lumen of the eccentric gear pump to install a rotor, and the cylindrical rotor pump cavity surface tangent (both small clearance), rotor slot is equipped with two gears with spring. Rotates, centrifugal force and the tension of the spring to make the top gear to keep in touch with the inner wall of pump chamber, rotor rotating slide along the pump drive gear cavity wall. Two gear rotor, surrounded by the pump cavity and two end cover crescent-shaped space is divided into A, B, C three parts, when the rotor rotates in the direction shown by the arrow, and the space of the suction mouth is same A volume is increased gradually, are in the process of suction.

And with vent space volume of C is diminishing, is in the exhaust process. In space in the volume of B is reduced gradually, and high pressure gear pump is in the midst of the compression process.