Hydraulic power unit and its pump

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 is arranged in the pump body, 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, the two ends, in the long diameter direction, of the rotor are provided with oil guide channels communicated with the two sides of the circumference of the rotor, and plugging blocks are mounted in 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 is provided with 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 force on the plugging blocks to force the plugging blocks to be located at the first positions; the end portion of the outer end of the plugging block is provide with plugging block end teeth, and the corresponding side channel walls of the oil guide channels are provided with rotor end teeth for being matched with the plugging block end teeth at the second positions to form maze sealing structures. 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 power devices in production and daily life are relatively common. The hydraulic power devices include a motor and a pump driven by the motor. The existing pump is such as the "pump" disclosed in Chinese patent CN101749228A. The pump includes a base on which there are The pump body, 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. There are two tangent points between the cross section of the rotor and the cylindrical hole inner cavity. 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 bot...

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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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