Digital variable hydraulic motor radial plunger pump

Abstract

The invention discloses a digital variable hydraulic motor radial plunger pump. A motor rotor (15) is arranged on a hollow composite shaft (8) in a hot sleeving mode and supported in a shell (12) through bearings (19 and 27), and a sealing ring (20), a sealing ring (26) and a lip-shaped sealing ring (25) are arranged on the two sides of each bearing; a ball plunger (5) and a sliding shoe (6) are rolled into a whole and are in spherical hinge connection, the axis of the ball plunger (5) is perpendicular to the axis of the hollow composite shaft (8), the sliding shoe (6) is in contact fit with an eccentric disc (8c) on the hollow composite shaft (8), and when the eccentric disc (8c) rotates along with the hollow composite shaft (8), the ball plunger (5) and the sliding shoe (6) are driven tomove in corresponding plunger holes (10c) formed in a pump body (10) and reset under the action of a reset spring (4); and the axis of a digital switch oil suction one-way valve (1) coincides with the axes of the plunger holes (10c), and an oil discharge one-way valve (3) is arranged perpendicular to an electromagnetic switch oil suction one-way valve (1).

Description

technical field [0001] The invention relates to electro-hydraulic integrated hydraulic power unit technology, in particular to a digital variable hydraulic motor radial plunger pump. Background technique [0002] The electro-hydraulic integrated hydraulic power unit is a new development direction of hydraulic power equipment, and it has developed rapidly in the international and domestic markets due to its huge advantages such as low noise, high efficiency, compact structure, and man-machine friendliness. At present, the technology mainly focuses on the integration of quantitative hydraulic pump and electric motor, such as the hydraulic motor vane pump of Eaton in the United States, the electro-hydraulic integrated helical gear pump of Rexroth in Germany, and the air gap non-immersed hydraulic motor vane pump developed by Lanzhou University of Technology, etc. . In occasions with high working pressure or even ultra-high pressure and strict requirements on axial dimensions, ...

AI Technical Summary

Problems solved by technology

[0003] Summarize the above technical deficiencies: 1. There are many parts / components involved, and the structure is relatively complicated; 2. The motor is cooled by air cooling, which has a lot of noise, or water-cooled / oil-cooled motors, but additional cooling systems are required, which increases the complexity of the system 3. There is insufficient oil absorption, especially at high speeds, resulting in low volumetric efficiency and low overall efficiency

4. The friction pair between the rotor and the plunger is not lubricated by oil, and the friction and wear are relatively large; 5. The bearing can only be sealed by grease, and its life is limited; 6. There is external leakage at the shaft seal, which may cause potential risks of polluting the environment; 7. Connection with the motor Couplings are still required, the axial dimension is still large, and the overall volume and weight are large

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