Dual-gear oil pump compensating axial clearance by side plates

Abstract

The invention discloses a dual-gear oil pump compensating axial clearance by side plates. The dual-gear oil pump comprises a pump body, a front cover and a rear cover. The front cover and the rear cover are respectively fixed to each end of the pump body. A high-pressure driving gear and a high-pressure driven gear are arranged in the rear cover. A low-pressure driving gear and a low-pressure driven gear are arranged in the pump body. Shafts of the driving gears and shafts of the driven gears are mounted in axle sleeves of the front cover and the rear cover. Floating side plates are arranged on two sides of the high-pressure driving gear and two sides of the high-pressure driven gear. The floating side plates are adopted to achieve objectives of axial clearance compensation and pressure balance. Due to the axial clearance compensation, axial stress can be reduced by 60%, the heating possibility of the pump is low and the noise is low. Pressure balancing grooves are formed in the floating side plates, thus greatly reducing the radial force of a bearing, and reducing the load of the bearing by 30%. The oil pump is prone to popularization, is an ideal energy-saving product and has long service lifetime.

Description

technical field [0001] The invention relates to the technical field of gear oil pumps, in particular to a double gear oil pump with side plate axial clearance compensation. Background technique [0002] Double gear pump is a kind of gear pump, which is a rotary pump that relies on the change and movement of the working volume formed between the pump body and two sets of meshing gears to transport liquid or pressurize it. There are two sets of gears in the pump body of the double gear pump. The two sets of gears form two sealed spaces with the pump body, which are the suction chamber and the discharge chamber. From small to large, a vacuum is formed to suck the liquid. The liquid rotates with the gear between the two teeth of the gear and enters the discharge chamber. The liquid in the discharge chamber is squeezed out to complete the working process of the gear pump. [0003] When the existing double gear pump is assembled, the axial relative positions of the two driving ge...

AI Technical Summary

Problems solved by technology

[0003] When the existing double gear pump is assembled, the axial relative positions of the two driving gears inside are randomly arranged, and the liquid between the teeth of the two driving gears enters the discharge chamber of the pump body at the same time, which makes the discharge chamber of the pump body The liquid pressure in the pump increases or decreases instantaneously, so that the gear pump has a large discharge pulse, not only the flow rate of the gear pump is unstable and difficult to control, but also the gear pump has considerable working noise, and the working performance of the gear pump is not good. good

Furthermore, since the front and rear covers and the middle pump body are made of ductile iron and have a fixed gap structure, although they can withstand high temperatures, the working pressure is not high, the volumetric efficiency of the pump is low, and the pump is prone to heat generation.

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