A four-quadrant operating hydraulic motor pump

Abstract

The invention relates to the technical field of hydraulic motor pumps, in particular to a four-quadrant operation hydraulic motor pump. The four-quadrant operation hydraulic motor pump is characterized by comprising a main shaft, a motor rotor is pressed on the main shaft, the main shaft is supported and installed on a front shell and a rear end cover through a first bearing and a second bearing,the motor rotor is connected with the main shaft through a drum-shaped spline coupling, the motor rotor is fixed in the front shell through a partition disc, a motor stator, a motor end cover, a thirdsealing ring, a second sealing ring, a first sealing ring, a third screw and a third gasket, the motor stator is pressed on an inner hole of the rear shell, the rear end cover, a first end surface sealing gasket, the rear shell and a second end surface sealing gasket are fixed on the front shell through a fourth screw and a fourth gasket, a rear sealing cover and a rear sealing cover sealing ringare fixed on the rear end cover, a front sealing cover, a first front sealing cover sealing ring and a second front sealing cover sealing ring are fixed on the front shell. The four-quadrant operation hydraulic motor pump has the advantages of being mute, efficient, energy-saving, high in power density, good in speed regulation performance, compact in structure, free of external leakage and the like, and is particularly suitable for occasions with potential load characteristics and relatively frequent switching of forward and reverse rotation.

Description

technical field [0001] The invention relates to the technical field of hydraulic motor pumps, in particular to a four-quadrant operating hydraulic motor pump. Background technique [0002] With the development of high-end hydraulic equipment, in some specific environments, new requirements are put forward for the performance of hydraulic power units. For example, the requirements for volume, weight, and power density in aerospace vehicles, the requirements for noise in mechanical equipment such as municipal engineering, and the requirements for compact structures in hydraulic robots. In this context, the motor pump, as a highly integrated hydraulic power unit, has become a new trend of development. [0003] At present, the motor pump products and patents that use motor and hydraulic pump integration / structural fusion at home and abroad are basically structural fusion between three-phase asynchronous motors and vane pumps, internal gear pumps or plunger pumps, and the speed ...

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Problems solved by technology

[0003] At present, the motor pump products and patents that use motor and hydraulic pump integration / structural fusion at home and abroad are basically structural fusion between three-phase asynchronous motors and vane pumps, internal gear pumps or plunger pumps, and the speed regulation performance is poor or impossible. Speed ​​regulation, there are also some patents that use permanent magnet servo motors integrated with hydraulic pumps. The speed is adjustable, but it cannot switch between forward and reverse working conditions, and has no braking function. In addition, the oil cooling method is generally to immerse the motor in coolant , which additionally increases the viscous loss of the air gap and reduces the overall efficiency of the hydraulic motor pump

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