Radial plunger hydraulic pump of double-acting type outer rotor

Abstract

The invention provides a radial plunger hydraulic pump of a double-acting type outer rotor. The radial plunger hydraulic pump of the double-acting type outer rotor utilizes an outer rotor inner stator structure. A pair of oil absorption radial cams and an oil pressing radial cam are respectively installed in the rotor. Straight reciprocating motion of plungers along the radial direction is achieved through driving of the cams, and pressure oil liquid is obtained. The radial cams can transfer power to the plungers in a low friction rolling mode. Oil distribution of each plunger cylinder utilizes a mode that a sliding valve is alternately communicated with an oil absorption port and an oil draining port. The straight motion of each valve core of the sliding valve depends on the driving of axial cams which are symmetrically arranged on two axial end panels in the rotor. The axial cams can transfer the power to the valve core of the sliding valve in a low friction rolling mode so that the communication of plunger cavities and an oil inlet hole or an oil outlet hole is switched. An oil distributing shaft and a cylinder body do not rotate, sealing is reliable, and leakage quantity is low. The outer rotor inner stator radial plunger hydraulic pump has the advantages of being compact in structure, high in volume efficiency, low in abrasion and symmetrical in stress.

Description

technical field [0001] The invention belongs to the technical field of radial plunger hydraulic pumps, in particular to a radial plunger hydraulic pump with a double-acting outer rotor. Background technique [0002] The hydraulic pump is the core component in the field of hydraulic technology, which is used to provide high-pressure oil with stable flow and pressure for the system. The performance of the hydraulic pump plays a vital role in the performance of the hydraulic system. Radial piston hydraulic pumps are widely used in metallurgy, mining, forging and other mechanical equipment due to their advantages of high volumetric efficiency, long life and stable operation. [0003] The traditional radial plunger hydraulic pump adopts the internal rotor structure. When the plunger hydraulic pump is working, the plunger and the cylinder used to generate hydraulic pressure rotate, relying on the centrifugal force and the reaction force of the inner wall of the pump to make the p...

AI Technical Summary

Problems solved by technology

Because the traditional radial plunger hydraulic pump is that the plunger cylinder rotates together with the drive shaft, the moment of inertia is large, and the oil is prone to air bubbles when the cylinder rotates at high speed, which is not conducive to improving the volumetric efficiency of the pump. There is a gap between them, and the leakage of oil will further reduce the volumetric efficiency of the pump; when the traditional radial piston hydraulic pump is working, the oil distribution shaft is subjected to radial unbalanced hydraulic pressure, which is easy to wear

Images