An Internal Gear Pump With Adjustable Volumetric Efficiency

Abstract

The invention provides an internal gear pump with adjustable volume efficiency. The internal gear pump comprises a pump body, a gear shaft, an inner gear ring and crescent-shaped levers, wherein the crescent-shaped levers include a crescent-shaped main lever and a crescent-shaped secondary lever, two leaf springs and two sealing rods are arranged between the abutted surfaces of the crescent-shapedmain lever and the crescent-shaped secondary lever, the two leaf springs and the two sealing rods are correspondingly matched, the abutted surfaces of the crescent-shaped main lever and the crescent-shaped secondary lever are divided into three sections, an oil suction chamber and an oil pressing chamber are formed in the pump body, a high-pressure oil passage is formed in the side wall of the oil pressing chamber, an oil leakage passage is formed in the side wall of the oil suction chamber, a valve sleeve, a locking screw and a valve element are arranged on the pump body, or a valve sleeve,a throttling orifice plate and an adjusting knob are arranged on the pump body. Partial pressure and flow of the high-pressure oil passage flow to the oil leakage passage of the oil suction chamber through throttling, so that the effect of adjusting the volume efficiency through throttling is achieved.

Description

technical field [0001] The invention relates to an internal meshing gear pump with adjustable volumetric efficiency. Background technique [0002] After the assembly test of each component in the existing internal meshing gear pump, the clearance between each friction pair and each part has been completely determined, so the volumetric efficiency of each internal meshing gear pump that passes the test is determined. The value cannot be changed, and its volumetric efficiency only slowly decreases with the wear of the friction pair parts caused by the increase of working time. Excessive wear will eventually cause the internal gear pump to fail. In some special internal gear pump application systems, when multiple internal gear pumps work in parallel and need to output the same flow rate, because the volumetric efficiency of each internal gear pump is different, and the existing internal gear pump The volumetric efficiency cannot be adjusted, so it is difficult to meet the req...

AI Technical Summary

Problems solved by technology

[0002] After the assembly test of each component in the existing internal meshing gear pump, the clearance between each friction pair and each part has been completely determined, so the volumetric efficiency of each internal meshing gear pump that passes the test is determined. The value cannot be changed, and its volumetric efficiency only slowly decreases with the wear of the friction pair parts caused by the increase of working time. Excessive wear will eventually cause the failure of the internal gear pump

In some special internal gear pump application systems, when multiple internal gear pumps work in parallel and need to output the same flow rate, because the volumetric efficiency of each internal gear pump is different, and the existing internal gear pump The volumetric efficiency cannot be adjusted, so it is difficult to meet the requirements of this application

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