An integrated radial piston pump driven by a permanent disk motor

Abstract

The invention relates to an integrated radial plunger pump driven by permanent magnet disc type electric machines. The integrated radial plunger pump comprises a pump shell, wherein a cam is arranged in the pump shell; two sides of the cam are tightly pressed by positioning sleeves respectively; a cylindrical lug boss is arranged on the inner side of each pump end cap, and a radial groove on which a stator winding is wound is formed in the inner side of each pump end cap; a current distribution shaft is fixed in the pump body; two ends of the current distribution shaft are respectively supported on a current distribution shaft sleeve and the second pump end cap; a shaft end gland is respectively arranged on the current distribution shaft sleeve and the second pump end cap and used for tightly pressing the two ends of the current distribution shaft; a rotor is supported on the current distribution shaft through a rolling bearing; radial grooves provided with permanent magnets are formed in two sides of the rotor; plunger holes are radially formed in the outer cylindrical surface of the rotor; connecting rod piston shoes are arranged on plungers; the bottom of each connecting piston shoe is an arc-shaped surface and is pressed inside the cam; the permanent magnet disc type electric machine is respectively arranged on each of two sides inside the pump. The integrated radial plunger pump adopts an integrated design of the electric machines and the pump and a through axis structure, is driven by the permanent magnet disc type electric machines and has the advantages of compact structure, simplicity in driving, balanced stress, running stability and high output power.

Description

technical field [0001] The invention belongs to the technical field of radial plunger pumps, in particular to an integrated radial plunger pump driven by a permanent disk motor. Background technique [0002] Motor-driven radial piston pumps are commonly used in large hydraulic presses to provide power for the system. Due to the advantages of high output pressure, large displacement, high volumetric efficiency and long service life, radial piston pumps are widely used in forging presses. , metallurgy, shipbuilding and other fields of hydraulic systems. [0003] In the traditional radial piston pump, the output shaft of the motor is connected with the distribution shaft of the pump, which drives the rotor in the pump to move. Through the eccentricity between the stator and the rotor, the plunger reciprocates in the radial direction and periodically changes the column. The volume of the plug cavity is realized by a certain flow distribution mechanism. In this method, the dist...

AI Technical Summary

Problems solved by technology

In this method, the distribution shaft of the pump and the output shaft of the motor are two independent parts, which are respectively fixed on both sides of the pump in the form of a cantilever beam, so the cantilever end will produce a certain deflection, which will affect the cooperation between the concentric shaft holes , generate vibration and noise, and at the same time increase the wear of the friction pair on the shaft and rotor

Since the motor and the pump are two independent components, it is necessary to precisely adjust the concentricity of the pump's distribution shaft and the motor's output shaft during installation, which is difficult to install; or use a flexible coupling for connection, but this will cause energy loss loss

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