Air gap non-oil-immersion type axial plunger motor pump

Abstract

The invention discloses an air gap non-oil-immersion type axial plunger motor pump. The air gap non-oil-immersion type axial plunger motor pump is an integrated integration of a motor, an axial plunger pump and an orifice type centrifugal pump. The composite shaft (6) integrates the central shaft of the motor, a main shaft of the plunger pump and the orifice centrifugal pump, the composite shaft not only has the function of transmitting power, but also has the functions of fluid circulation, strengthening convection heat dissipation and auxiliary pressurization, the composite shaft is hot assembly with motor rotors (15), the composite shaft is supported in a shell body (17) and the inner end cover (12) through first bearings (18) and second bearings (10), both ends are sealed by first sealparts (20) and second seal parts (9) to prevent hydraulic oil from entering air gaps between the motor stators (14) and the rotors (15). According to the air gap non-oil-immersion type axial plungermotor pump, the non-contact type labyrinth sealing structure is adopted, extra friction loss caused by contact between the sealing ring and the shaft is avoided, the efficiency of the motor pump is further improved, a pump core (5) of the plunger pump is connected with the composite shaft (6) through a spline, and the pump core is supported in the pump core seat (3) through a third bearing (4).

Description

technical field [0001] The invention relates to a hydraulic motor pump, in particular to a hydraulic motor pump integrated with a motor and an axial piston pump. Background technique [0002] The hydraulic motor pump is a new generation of electro-hydraulic power unit, which has excellent performances such as quietness, energy saving, and greenness, and can be widely used in hydraulic systems as a hydraulic power unit. International companies such as EATON in the United States and YUKEN in Japan have mature products with different structures and functions. Domestic research institutes also have related patent authorizations, such as a plunger-type electro-hydraulic pump (CN106089624A) applied by Beihang University. Through analysis, it can It is found that no matter it is a product or a patent, although the motor cooling fan and coupling are removed, the noise is reduced to a certain extent, but the motor stator and rotor are immersed in the oil, and the viscosity of the mot...

AI Technical Summary

Problems solved by technology

[0003] Patent (CN103047134A) technical shortcomings analysis, the dynamic seal in this scheme uses a lip seal ring, which belongs to the contact seal, friction and wear occur on the contact surface of the shaft and the seal ring during operation, resulting in energy loss, and may also cause abrasives to enter the main pump Among them, it affects the work of the main pump, especially at high speeds. In addition, the integrated vane pump cannot work at low speeds, and the application fields of motor pumps are limited.

Images