Variable control system of plunger variable pump

A variable control and variable pump technology, applied in the field of hydraulic pumps, can solve problems such as inconvenient installation, poor stability, and increased system volume, and achieve the effect of simple structure and improved working stability

Inactive Publication Date: 2009-10-07
SHANGHAI ELECTRICAL HYDRAULICS & PNEUMATICS
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AI Technical Summary

Problems solved by technology

The variable control methods of plunger variable pumps that appear at home and abroad are mainly in the form of a single variable, such as constant pressure variable control, constant power variable control, etc. These variable control methods generally can only realize one variable function, and the function is single. It cannot meet the various performance requirements of the hydraulic s...

Method used

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  • Variable control system of plunger variable pump

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Embodiment Construction

[0013] Such as figure 1 As shown, the variable control system of the plunger variable pump of the present invention includes a plunger variable pump 100 , a constant power valve 200 , a pressure cutoff valve 300 and a load sensing valve 400 .

[0014] Among them, the oil inlet of the plunger variable pump 100 sucks hydraulic oil from the oil suction port S through the input main oil circuit 002, and supplies oil to the load 003 in the hydraulic system through the output main oil circuit 001 from the oil outlet, and the output main oil circuit 001 is the load outflow oil circuit 004 after passing through the load 003.

[0015] The variable plunger pump 100 has a left cylinder assembly 110 and a cylinder assembly 120 for adjusting the inclination angle of the swash plate 101 to change the output power of the variable plunger pump 100 . Wherein, the left oil cylinder assembly 110 has an oil cylinder 111, a variable piston 112 located in the oil cylinder 111 and an adjusting rod ...

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Abstract

The invention discloses a variable control system of plunger variable pump, comprising a plunger variable pump having an output main oil way supplying oil to load of a hydraulic system, a left variable oil cylinder component and a right variable oil cylinder component used for regulating swash plate tilt angle change, also having a constant power valve, a pressure stop valve and a load sensitive valve. The system realizes three control functions at the same time: constant power, pressure stop and load sensing, not only has simple structure, but also can greatly improve work stability of the plunger variable pump, and has advantage of saving energy.

Description

technical field [0001] The invention belongs to the technical field of hydraulic pumps, and relates to a variable plunger pump, in particular to a variable control system for a variable plunger pump. Background technique [0002] With the development of technology, the hydraulic system requires more and more variable pumps, and the requirements for the variable form of hydraulic pumps are also getting higher and higher. The variable control methods of plunger variable pumps that appear at home and abroad are mainly in the form of a single variable, such as constant pressure variable control, constant power variable control, etc. These variable control methods generally can only realize one variable function, and the function is single. It cannot meet the various performance requirements of the hydraulic system (such as satisfying power regulation, energy saving, overflow and other functions at the same time). If you want to realize multi-function, you can only achieve the g...

Claims

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Application Information

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IPC IPC(8): F04B1/12F15B11/02
Inventor 李斌陈俊龙
Owner SHANGHAI ELECTRICAL HYDRAULICS & PNEUMATICS
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