Variable gear pump

Abstract

The invention discloses a variable gear pump. The variable gear pump comprises a pump case, a left end cover arranged at the left end of the pump case and a right end cover arranged at the right end of the pump case, wherein a driven shaft and a driving shaft are rotatably connected between the left end cover and the right end cover in the pump case, the right end of the driving shaft stretches out of the right end cover, a first driving gear is fixedly installed on the driving shaft in the pump case, and the driven shaft is rotatably connected with a first driven gear engaged with the first driving gear; the pump case is provided with an oil suction port and an oil discharge outlet on the two sides of the engagement region of the first driving gear and the first driven gear; a second driving gear side by side with the first driving gear is arranged on the driving shaft in the pump case, the driven shaft is rotatably connected with a second driven gear engaged with the second drivinggear, and the second driven gear and the first driven gear are arranged side by side; and a variable control assembly is arranged in the left end cover. The variable gear pump is not only simple in structure, but also convenient to install.

Description

technical field [0001] The invention belongs to the technical field of gear pumps, in particular to a variable displacement gear pump. Background technique [0002] Gear pump is a kind of equipment often used in the field of hydraulic machinery, among which variable gear pump is the equipment that needs to be used in many special occasions. Variable gear pump is mainly divided into internal meshing variable gear pump and external meshing variable gear pump. The main principle of the existing two variable gear pumps is to achieve the purpose of variable by changing the meshing length between the first driving gear and the first driven gear. During the variable process, leakage will occur due to the shortening of the meshing length. In addition, the mechanism for controlling variables is more complicated, and the effect of variables is not obvious. SUMMARY OF THE INVENTION [0003] (1) Technical problems to be solved [0004] The purpose of the present invention is to prov...

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Problems solved by technology

[0002] The gear pump is a kind of equipment often used in the field of hydraulic machinery, and the variable gear pump is the equipment that needs to be used in many special occasions. The variable gear pump is mainly divided into two types: the internal meshing variable gear pump and the external meshing variable gear pump. The main principle of the two existing variable gear pumps is to achieve the purpose of variable displacement by changing the meshing length between the first driving gear and the first driven gear. In the process of variable displacement, leakage will occur due to the shortening of the meshing length Increased problems, and the mechanism for controlling variables is more complex, and the effects of variables are not obvious

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