Pressure holding gear pump

Abstract

The invention relates to a pressure holding gear pump. The pressure holding gear pump comprises a driving shaft, a right driven shaft, a left driven shaft, a driving gear, a right driven gear, a left driven gear, a front outer end cover, a back outer end cover, a middle ring bar spring, a right ring bar spring, a left ring bar spring and a pump body. The pressure holding gear pump has the following improvements that two sections of arcs in the center of an inner cavity of the pump body are in sliding fit with the excircle of the driving gear; the right majority circular arc in the inner cavity of the pump body is in sliding fit with the excircle of the right driven gear; the left majority circular arc in the inner cavity of the pump body is in sliding fit with the excircle of the left driven gear; the driving shaft in the center of the driving gear is parallel to the right driven shaft in the center of the right driven gear, and the driving shaft in the center of the driving gear is parallel to the left driven shaft in the center of the left driven gear; an inner plane of a back cover of the back outer end cover is hermetically fixed on the back end face of the pump body; an inner plane of a front cover of the front outer end cover is hermetically fixed on the front end face of the pump body; and a horizontal frontal plane of an end face compensation disk keeps close to the driving gear, the right driven gear and the left driven gear at the same time, and the middle ring bar spring, the right ring bar spring and the left ring bar spring are respectively arranged between the back surface of the end face compensation disk and the inner side plane of the front outer end cover.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and the international patent classification is F04D non-variable pump, which relates to an energy-converting rotary displacement pump which converts mechanical energy into liquid pressure energy, in particular to a pressure-maintaining 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 announc...

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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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