Vane hand pump

Abstract

A blade type hand pump comprises a pump body, a rotor, blades and a pump shaft; a blade pump modular unit is mounted on an inner cavity of the pump body and comprises a pump chamber assembly and a rotor assembly; in the structure, arc-shaped trilateral equal-width cam groove plates are used as guiding mechanisms for the blades, the rotor and two side plates are connected into a whole to rotate synchronously, thus, during operation, heating caused by the fact that end surfaces of the blades rub against side surfaces can be avoided, vibration and noises produced by liquid trapping can be avoided, and the modular blade pump can be used for delivering oil and water. Compared with a traditional reciprocating manual pump, the blade type hand pump has the advantages that the blade type hand pump can save half the time when sucking same volume of water, a rotating handle better meets the operation habit of a person than an up-and-down swing arm, the person does not feel fatigue easily, all that is required for pump repair is to replace a module, the pump is convenient and rapid to repair, and the pump is high in self-priming performance, balanced in liquid flow and high in efficiency.

Description

Technical field [0001] The invention relates to a positive displacement pump, particularly a vane type hand pump. Background technique [0002] Most of the currently known hand pumps are swing arm piston reciprocating hand pumps. This type of pump has strong self-priming ability and simple structure, but the disadvantage is that one suction row is one row, the water flow is intermittent, and the water discharge cycle is long. The vane pump, which is also a positive displacement pump, also has a good self-priming function. The water flow is continuous, and it is very suitable for use as a hand pump. It consists of a pump body with suction and discharge ports, an offset rotor, and multiple radial slots inserted in the rotor. Due to its simple and compact structure, strong self-priming ability, smooth flow without pulse, and efficiency as high as over 80%, it is widely used as an oil pump. However, the traditional vane pump also has its shortcomings. One is that the outer end surfa...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the known hand pumps are swing arm piston reciprocating manual pumps. This kind of pump has strong self-priming ability and simple structure, but the disadvantage is that one suction and one row, the water flow is intermittent, and the water discharge period is long.

However, the traditional vane pump also has its defects. First, the outer end surface of the vane and the inner surface of the pump body, as well as the two sides of the vane and the left and right stationary side plates all produce friction, resulting in heat; The volume of the closed space surrounded by the inner cavity of the pump body and the two blades changes continuously during operation. When the volume changes from large to small, it is easy to trap liquid. Due to the incompressibility of liquid, the excess liquid is forced from the gap. Extrusion, resulting in noise and vibration; the above two defects reduce the efficiency of the pump, it can only be used for oil with good lubricity, but not for water with poor lubricity, and it is not suitable for hand pumps

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