Hydraulic-pressure power device and pump thereof

Abstract

The invention relates to a hydraulic-pressure power device and a pump thereof. The pump includes a pump body with a cylindrical-hole inner cavity, a rotor of which the rotation axis extends in the front-and-rear direction is arranged in the pump body, the section of the rotor is of a polygon structure, ribs tangent to a cylindrical hole are formed between every two adjacent edges, a liquid inlet hole and a liquid outlet hole which are separated by a partition plate are formed in the pump body, one end of the partition plate is matched with the peripheral face of the rotor in a sliding and pushing mode, each rib is provided with an oil guide channel communicated with the two sides of the circumference of the rib, and plugging blocks are mounted on the rotor in a guiding and moving mode in the radial direction of the rotor; in the movement range of the plugging blocks, each plugging block has a first position and a second position, wherein when at the first positions, the plugging blocks step aside from the oil guide channels, and when at the second positions, the plugging blocks move outward under the effect of centrifugal force to plug the oil guide channels; springs are arranged on the rotor, wherein the springs are used for exerting acting force on the plugging blocks to force the plugging blocks to be located at the first positions. The pump capable of reducing a starting load and the hydraulic-pressure power device using the pump are provided.

Description

technical field [0001] The invention relates to a hydraulic power device and its pump. Background technique [0002] At present, hydraulic powertrains are relatively common in production and life. The hydraulic powertrain includes a motor and a pump driven by the motor. The existing pump is such as the "pump" disclosed in Chinese patent CN101749228A. A pump body is provided, and the pump body has a cylindrical hole inner cavity, and a rotor whose rotation axis extends along the front and rear directions is arranged in the cylindrical hole inner cavity. Shape-empty tangent. There is a hole on the outer periphery of the pump body, and a baffle is installed at the hole to guide and move. The baffle divides the hole into a liquid inlet and a liquid outlet. The rotor is a cylinder. [0003] When in use, the rotor rotates clockwise, and the cavities on both sides of the rotor communicate with the liquid inlet and the liquid outlet respectively. The cavity connected with the liqu...

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Problems solved by technology

The existing problem of this kind of pump is: the rotor is driven by the motor to rotate, corresponding to the motor, the start-up load is large, not only the power consumption but also the loss of the motor is large, and in the prior art, when the motor is started, the low pressure cavity The motor is already filled with hydraulic oil, and the start of the motor can only be completed by working on the hydraulic oil, which increases the starting load of the motor, which not only leads to an increase in the minimum power when the motor is selected, but also affects the normal energy consumption of the motor

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