Integrated motor vane pump hydraulic power unit

Abstract

The invention relates to an integrated motor vane pump hydraulic power unit. In the integrated motor vane pump hydraulic power unit, a motor rotor (27) is connected with a rotor sleeve (21) and a main shaft (16) through a pin (14) and a screw (20), so as to form a rotor body; the rotor body is supported on a pump rear cover (15) and a pump core seat (10) through a sliding bearing (28) in the pump core seat (10) and two groups of rolling bearings (19) in the pump rear cover (15); a vane pump (29) is connected with the main shaft (16) through a spline (16c); the vane pump (29) is arranged in the pump core seat (10) through an oil outlet gland (3), a screw (4), a gasket (5) and a pump front cover (8); a motor stator (26) is pressed in a motor base (25); the pump front cover (8) and the pump rear cover (15) are fixed on the motor base (25); the motor base (25) is fixed on a support (1a) in a box body (1); an oil outlet of a hydraulic pump (29) is communicated with an inner runner (3a) of the oil outlet gland (3); and the oil outlet gland is connected with an oil path block (30) on the box body (1) through a high-pressure oil pipe (2).

Description

technical field [0001] The invention relates to the field of hydraulic power units, in particular to an integrated electro-hydraulic power unit. Background technique [0002] The hydraulic power unit is the heart of the hydraulic system. At present, the hydraulic power unit with the electric motor as the driving force is a discrete structural form. The hydraulic pump is connected to the fuel tank through straight pipes, bent pipes, pipe joints, seals, stop valves and other accessories. The entire hydraulic power unit has complex structure, low efficiency, large volume and weight; There are possible external leakages at the connecting parts of the pipeline and the shaft extension of the hydraulic pump; in addition, since the independent hydraulic pump has a closed shell and is independent from the fuel tank, its oil suction port is connected to the fuel tank through pipelines, resulting in The increase of the flow resistance and the compression of the space of the oil suctio...

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Problems solved by technology

[0002] The hydraulic power unit is the heart of the hydraulic system. At present, the hydraulic power unit with the electric motor as the driving force is a discrete structural form. The hydraulic pump is connected to the fuel tank through straight pipes, bent pipes, pipe joints, seals, stop valves and other accessories. The entire hydraulic power unit has complex structure, low efficiency, large volume and weight; There are possible external leakages at the connecting parts of the pipeline and the shaft extension of the hydraulic pump; in addition, since the independent hydraulic pump has a closed shell and is independent from the fuel tank, its oil suction port is connected to the fuel tank through pipelines, resulting in The increase of the flow resistance and the compression of the space of the oil suction chamber will cause local negative pressure in the oil suction flow channel and insufficient oil suction of the hydraulic pump, causing bubble precipitation, cavitation noise and vibration, so the noise of the entire hydraulic power unit is also very large

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