Gear pump

Abstract

The invention discloses a gear pump, which comprises a driving shaft, a right driven shaft, a left driven shaft, a master gear, a right driven gear, a left driven gear, a front outer end cover, a back outer end cover and a pump body. As an improvement, two arcs in a center on an inner cavity of the pump body are in sliding fit with the outer circle of the master gear; a right more-than-half circular arc on the inner cavity of the pump body is in sliding fit with the outer circle of the right driven gear; a left more-than-half circular arc on the inner cavity of the pump body is in sliding fit with the outer circle of the left driven gear; the driving shaft in the center of the master gear is parallel to the right driven shaft in the center of the right driven gear; the driving shaft in the center of the master gear is parallel to the left driven shaft in the center of the left driven gear; a back cover inner plane of the back outer end cover is hermetically and fixedly arranged on the back end surface of the pump body; a front cover inner plane of the front outer end cover is hermetically and fixedly arranged on the front end surface of the pump body; a frontal plane of an end surface compensation disk is synchronously attached with the master gear, the right driven gear and the left driven gear; and a back pressure cavity on the back surface of the end surface compensation disk is led to a right outlet pipeline through a right back pressure passage and is led to a left outlet pipeline through a left back pressure passage respectively.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and the international patent classification is F04D non-variable displacement pump, which relates to an energy conversion rotary positive displacement pump which converts mechanical energy into liquid pressure energy, in particular to a gear pump. Background technique [0002] The known gear pumps are all working in pairs. Due to the large pressure difference between the inlet and outlet, it is bound to cause unilateral force on the gear, especially the unilateral force on the driving gear, which directly causes unilateral wear and leakage at the shaft of the driving gear. As a result, the life of the gear pump is short and the pressure rise is limited. Another problem that has been plagued by gear pumps that cannot be effectively solved is that after long-term high-speed operation, the inevitable wear of the end face cannot be effectively compensated. my country patent authorization announ...

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Problems solved by technology

my country patent authorization announcement number: CN1059019C swing vane pump; my country patent authorization announcement number: CN100374725C rotary vane pump; The internal gear pump of plastic casing; my country's patent authorization announcement number: CN101120175B and my country's patent authorization announcement number: CN101403382B a kind of gear pump for micro-miniature turbojet engine, etc., all do not see that there is a practical method to solve the stress of the gear pump. Symmetry and face wear clearance control issues

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