Servo pump with reverse spool valve sleeve valve distribution

Abstract

The invention provides a valve-distributed servo pump with inverted spools and sleeves. The pump comprises at least one pump unit. Each pump unit comprises a pump shell; the pump shell is internally provided with two mounting cavities penetrating the pump shell; end covers for closing openings of the mounting cavities are fixedly connected to the pump shell; a linear motor is mounted in each mounting cavity and comprises a stator in fixing fit with the mounting cavity; a rotor is slidably connected inside each stator; each rotor is provided with a mounting through hole; the middle of each mounting through hole is provided with a positioning protrusion; one spool is disposed in each mounting through hole; the spools are fixedly connected with the end covers; a spring is clamped between each spool and the corresponding positioning protrusion. The valve-distributed servo pump has the advantages that flow adjustment is highly dynamic, the need of a pump control system is better met, and compared with the one-way valve distributed reciprocating pump, the valve-distributed servo pump has an actively adjustable pumping direction.

Description

technical field [0001] The invention relates to the technical field of hydraulic transmission, in particular to a servo pump with reverse valve core, valve sleeve and valve flow distribution. Background technique [0002] Hydraulic technology is one of the important technologies in the field of modern engineering machinery technology. The hydraulic pump is the component that completes the conversion of mechanical energy to hydraulic energy in the hydraulic system. The existing hydraulic pumps mainly include plunger pumps, vane pumps, gear pumps and other forms. The above-mentioned traditional hydraulic pumps are mainly used in open hydraulic systems. Its characteristic is that regardless of the demand of the load, the pump and the motor unit have been running at high speed to complete the conversion of electrical energy to hydraulic energy, and maintain the stability of the system pressure through accumulators and relief valves. , to provide sufficient hydraulic power to the...

AI Technical Summary

Problems solved by technology

Its defect is that the rotary motion of the plunger on the revolution circle needs to be converted into reciprocating motion through a complex mechanism, which results in many internal transmission links and friction pairs of the plunger pump.

For the application requirements of the pump-controlled hydraulic system, the plunger pump needs to change the direction of rotation of the rotating parts to change the flow direction of the oil, or dynamically adjust the inclination of the swash plate to change the flow direction of the oil. The complexity of the structure causes the moment of inertia of the rotating parts Large, so its ability to dynamically adjust the system flow and pressure is limited, which cannot meet the high dynamic requirements of the pump control system

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