A triple combination gear pump with internal and external meshing

Abstract

The invention provides an internal and external meshing triple combination type gear pump which comprises an internal meshing gear pump and two external meshing gear pumps. A spindle of the internal meshing gear pump is connected with one end of a driving gear shaft of the second external meshing gear pump, the other end of the driving gear shaft of the second external meshing gear pump is meshed with a driving gear shaft of the first external meshing gear pump. The two external meshing gear pumps are overlaid with the internal meshing gear pump to form the triple combination type gear pump. The triple combination type gear pump is provided with two oil inlets and three oil outlets, can be used for two different kinds of transmission oil and hydraulic oil to do work, and can be applied to a sealed multi-disc wet brake forklift. In addition, the internal and external meshing triple combination type gear pump is compact in structure, small in size and light in weight, performs transmission stably and is better in oil absorption condition, higher in dirt resistance and smaller in noise.

Description

technical field [0001] The invention relates to a gear pump, in particular to a triple combination gear pump with internal and external meshing. Background technique [0002] The closed multi-disc wet brake is the most advanced and reliable brake in the world today, and is widely used in mining machinery, but it is hardly used in small and medium tonnage forklifts. This is because the closed multi-disc wet brake requires a circulating cooling pump, but is limited by the PTO port of the forklift, so it can only be equipped with triple gear pumps, one of which is used for the working gear pump, one is used for the brake gear pump, and the other is used for the brake gear pump. It is used in drive axle circulating cooling gear pump, and works in two media, transmission oil and hydraulic oil. However, the existing triple pumps are all external gear pumps, which have large structural dimensions, high noise, and poor anti-pollution ability. They can only work in one medium and ca...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above existing problems, to provide a triple combination gear pump with internal and external meshing, which has small structural size, stable transmission, low noise, long service life, strong anti-pollution ability, good oil absorption characteristics, and high volumetric efficiency. ; And it can work in two different working media, which solves the problem that it cannot be applied to forklifts equipped with closed multi-disc wet brakes

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