A self-balancing gear pump with internal and external threads

Abstract

The invention discloses an internal and external thread self-balancing gear pump. A right inlet pipeline and a left inlet pipeline are jointed to an oil inlet main pipe, a right outlet pipeline and a left outlet pipeline are jointed to an oil outlet main pipe, two sections of arc at the center of a pump inner cavity body are in a sliding fit with an excircle of a drive gear, most arc on the right of the pump inner cavity body is in the sliding fit with an excircle of a right driven gear, most arc on the left of the pump inner cavity body is in the sliding fit with an excircle of a left driven gear, a driving shaft at the center of the drive gear is parallel to a right driven shaft at the center of the right driven gear, the driving shaft at the center of the drive gear is parallel to a left driven shaft at the center of the left driven gear, a rear cover inner plane of a rear outer end cover is fixed on the rear end surface of the pump body in a sealing mode, a front cover inner plane of a front outer end over is fixed on the front end surface of the pump body in the sealing mode, a front plane of an end surface compensation disc is simultaneously attached to the drive gear, the right driven gear and the left driven gear, and a backpressure cavity on the rear surface of the end surface compensation disc is led to the right outlet pipeline and the left outlet pipeline through a right backpressure channel and a left backpressure channel respectively.

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 that converts mechanical energy into liquid pressure energy, in particular to a self-balancing gear pump with internal and external threads. 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 ...

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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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