Double oil path vane pump /motor

Abstract

The present invention discloses a double-oilchannel vane pump or motor, the left and the right end covers of which are respectively provided with two oil inlets and two oil outlets, and two oilchannels are utilized to control the operation of the vanes of the double-oilchannel vane pump or motor. Since the double-oilchannel structure is adopted, not only the vane pump of the present invention have the advantages of simple structure, small output oil pressure pulsation, etc., but also feedback pressure oil provides counter pressure for the vanes, so that the output pressure of the pump is effectively increased. Moreover, by changing the shape of the curved surface of a rear oil-exhausting area in a working cavity, the vane pump has the function of outputting multiple types of working pressure oils. The vane motor of the present invention, which has the advantages of uniformly stressed oil pressure and small output torque pulsation, is applicable to not only high-speed and small-torque conditions but also low-speed and large-torque conditions, meanwhile, since the pressure oil is utilized to replace the prior springs to provide counter pressure, the structure is simplified, and the operation of the double-oilchannel vane pump or motor becomes more reliable and stable.

Description

technical field [0001] The invention relates to a vane pump and a motor with double oil passages. Background technique [0002] According to different structures, existing hydraulic pumps can be divided into gear pumps, plunger pumps, and vane pumps. Among them, vane pumps are popular because of their small size, high volumetric efficiency, and small oil pressure pulsation. However, since the vane pump uses the centrifugal action of the vane during the rotation process to change the volume space of the pump body, when the pressure of the oil pressure on the outer end of the vane is equal to or greater than the centrifugal force of the vane, the vane will be pressed back to its position on the rotor. The vane pump cannot work normally, and the vane pump itself has problems such as strength and leakage. Therefore, the limit output oil pressure of the vane pump is usually not too high, which limits the use of the vane pump. scope. [0003] As for the vane motor, although it h...

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Problems solved by technology

However, since the vane pump uses the centrifugal action of the vane during the rotation process to change the volume space of the pump body, when the pressure of the oil pressure on the outer end of the vane is equal to or greater than the centrifugal force of the vane, the vane will be pressed back to its position on the rotor. The vane pump cannot work normally, and the vane pump itself has problems such as strength and leakage. Therefore, the limit output oil pressure of the vane pump is usually not too high, which limits the use of the vane pump. scope

[0003] As for the vane motor, although it has the advantages of small size and high volumetric efficiency, it also has the disadvantage that the working oil pressure cannot be too high, and it is only suitable for use in high-speed and low-torque occasions.

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