Oil-leading stripping pump

Abstract

The invention relates to a vane pump, in particular to a lead oil stripping pump which includes a motor, a coupling and a pump body assembly. The pump body assembly includes a pump cover, a pump cover plate, a pump body, a stator, a sliding vane, a rotor, a pump shaft and a roller assembly which are successively connected. The shaft of the motor is connected with the pump shaft through the coupling. The vane is arranged in the radial groove of the rotor in a way of sliding. The roller assembly is installed on the two ends of the vane. The pump cover plate is arranged on the inner lateral of the pump cover. A positioning accommodating cavity is arranged in the pump cover plate, the internal circumference surface of which is a round multi-section line-surface. The roller assembly is arranged in the positioning accommodating cavity of the pump cover plate and is matched with the inner circumference surface of the positioning accommodating cavity in a way of rolling. The inner surface of the stator is a multi-section line-surface which is corresponding to the inner circumference surface of the positioning accommodating cavity. A dent surface is used for connecting adjacent multi-section line-surfaces. An absorption port or a discharging port is arranged on the dent surface. The vane pump is provided with good anti-cavitation performance, anti-air bound capacity and efficient and stable operation.

Description

technical field [0001] The invention relates to a sliding vane pump, in particular to an oil diversion stripping pump. Background technique [0002] The Chinese patent number is 200510062213.8, and the patent publication date of authorization announcement is February 20, 2008, which discloses a double-acting non-contact sliding vane pump. The sliding vane pump includes a motor, a coupling, a pump body assembly, a pump The body assembly includes the block cover, pump cover, pump cover plate, pump body, stator, sliding vane, rotor, pump shaft, transparent cover, roller assembly connected in sequence, and the shaft of the motor is connected with the pump shaft through a coupling. The sliding vane is slidably placed in the radial groove of the rotor. Roller assemblies are installed at both ends of the sliding vane. The pump cover is installed on the inner side of the pump cover. The roller assembly is mounted on the inner surface of the pump cover. The surface has the same prof...

AI Technical Summary

Problems solved by technology

[0003] However, in the above-mentioned double-acting non-contact vane pump, since the inner surface of the pump cover plate is the same as the inner surface of the stator, there are eight lines on the pump cover plate and the inner surface of the stator, that is, two equal-radius large arc curves, two There are eight transition points among the three equal-radius small arc curves and the four transition curves. When the rotor is driven by the motor at high speed, when the roller assemblies on both sides of the slide plate pass through the eight transition points, the The area of ​​the corresponding flow-through area is too small, resulting in too fast fluid flow, especially in the flow-through area of ​​the stator inlet, where the fluid flow rate is too fast, resulting in a decrease in the cavitation performance of the pump. Cavitation phenomenon, so that it is impossible to carry out the stripping operation, there will be different degrees of excitation and voiding, which directly destroys the tiny gap between the top of the slide vane and the inner surface of the stator through part size control, resulting in a decrease in cavitation performance. The pump cannot carry out normal oil and gas mixed transportation

[0004] In addition, in the above-mentioned double-acting non-contact sliding vane pump, since the sliding vane is slidably placed in the radial groove of the rotor, the cover plates on both sides of the pump are tightly assembled with the two ends of the sliding vane and the two ends of the rotor to form a sealed friction pair. Under the conditions of oil diversion and cabin stripping, the gas and liquid have high oil and gas content, and the friction pair cannot get sufficient lubrication and heat dissipation during long-term operation, which will lead to "burning plate", that is, one side of the pump cover plate, High temperature will cause adhesion between the two ends of the sliding vane and the two ends of the rotor, especially the friction pair between the side of the pump cover plate and the two ends of the sliding vane will be completely destroyed, resulting in the inability of the sliding vane to move freely in the radial groove of the rotor effectively and normally. Sliding, so that the temperature in the pump rises sharply, which not only seriously affects the gas-liquid mixed transportation function of the pump; at the same time, it will cause the pump to die due to seizure, damage the internal parts, and cause the motor to burn out

Images