Double-cycloid rotor variable pump

Abstract

The invention relates to a rotor pump structure which can change flow rate, in particular to a double-cycloid rotor variable pump; a rear end cover (14) is internally provided with a valve plate (8) which is provided with an oil inlet (A) and an oil outlet (B); a variable shaft (13) is inserted into the center of the valve plate (8); a variable mechanism is configured on the variable shaft (13); the right end of the variable shaft (13) is fixedly connected with an eccentric shaft (2) with the mutual axis position being deviated; a transmission shaft (1) is inserted into the center of a front end cover (15) and is fixedly connected with a rotating disc (5); a ring of cylindrical pin teeth (4) are arranged on the rotating disc (5) by a cantilever; the pin teeth exposed outside of the cantilever are inserted in a ring groove formed by matching of an outer rotor (6) and an inner rotor (3); and the axis of the front end cover (15) and the center of the circular inner wall of a shell (7) have eccentricity. The flow rate can be changed by rotating the eccentric shaft (2); the adjustment of the flow rate is simple, convenient and easy; and the continuity of absorbing and discharging oil is strong and the requirement to hydraulic oil is not high.

Description

(1) Technical field [0001] The invention relates to a pump structure, in particular to a variable flow rotor pump structure. (2) Background technology [0002] At present, as commonly used variable displacement pumps, there are two kinds of variable displacement vane pumps and variable displacement plunger pumps, each of which has its own advantages and disadvantages. [0003] The structure of the vane pump is complex, difficult to manufacture, sensitive to the rotational speed of the shaft, too fast and too slow can not work normally, high oil requirements, easy to jam the blades after oil contamination, resulting in rapid wear. At high speed, the pressure difference between the two ends of the blade will easily cause the blade to separate from the surface of the stator, resulting in the blade being hollow. Under high pressure, the surfaces of blades and stators are easy to wear, the flow adjustment range is small, and the variable mechanism is complicated. [0004] The p...

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Problems solved by technology

[0003] The structure of the vane pump is complicated, the manufacture is difficult, and it is sensitive to the rotational speed of the shaft. It cannot work normally if it is too fast or too slow.

At high speed, the pressure difference between the two ends of the blade will easily cause the blade to detach from the surface of the stator, causing the blade to fall out of the air

Under high pressure, the surface of the vane and the stator is easy to wear, the flow adjustment range is small, and the variable mechanism is complicated

[0004] The plunger pump has a complex structure, many parts, difficult manufacture, and high price. It is mostly used as a high-pressure pump. Similar to the vane pump, this pump has high requirements for oil, and the plunger is easy to be stuck after dirty oil. High speed, and the variable mechanism is very complicated

[0005] As is well known, the double cycloid rotor pump has many advantages, but the rotor pumps so far do not have the function of variable volume adjustment

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