Pressure relief protected gear pump, manufacturing method and pressure relief protection method thereof

Abstract

The invention relates to a pressure relief protection gear pump, a manufacturing method and a pressure relief protection method thereof; the pressure relief protection gear pump includes a pump cavity, and a driving gear and a driven gear are arranged in the pump cavity to mesh with each other, and are located between the driving gear and the driven gear. The pump chamber at the top of the moving gear is provided with a floating valve that can be popped open for pressure relief when overloaded. The pressure relief protection method of the gear pump includes: (1) When the fluid entering the pump chamber causes the pressure in the pump chamber to exceed the elastic force of the floating valve, the valve is lifted to make the vacuum in the pump chamber disappear; (2) The fluid in the pump chamber moves along the pump chamber The inlet backflow, thereby releasing the pump chamber pressure, when the pump chamber pressure is less than the elastic force of the float valve, the valve will reset. The pump cavity of the present invention has a self-protection function. When the pressure in the pump cavity is overloaded, the floating valve plate can be popped open to release the pressure, so as to avoid accidents of pump burst or motor burnout caused by overpressure. This manufacturing method can reduce gear pump pressure. The technological process of production reduces the cost.

Description

technical field [0001] The invention relates to a fluid machine, in particular to a pressure relief protection gear pump, a manufacturing method and a pressure relief protection method thereof. Background technique [0002] The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to deliver or pressurize the liquid. Existing gear pumps generally consist of two closed spaces, the pump body and the front and rear covers. When the gears rotate, the volume of the space on the side where the gears are disengaged increases from small to large, forming a vacuum, sucking the liquid, and the space on the side where the gears mesh The volume of the space changes from large to small, and the liquid is squeezed into the pipeline. Discharging the liquid is to release the pressure in the internal space. The pressure relief protection of the gear pump is particularly important because the overload of ...

AI Technical Summary

Problems solved by technology

Its shortcoming is: can't solve the problem that the pressure overload of the gear pump causes the pump to burst or the motor burns out

The traditional high-pressure gear pump design must process a metal cavity with a washing bed. In addition to the complicated process and high cost, based on the principle of the gear pump, the part that really has a vacuum effect is actually only half of the cavity

The gear cavity is mostly closed by fixed front and rear covers, so that when the vacuum pump body forms an overpressure, accidents such as pump burst or motor burnout are prone to occur

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