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Closed hydraulic system of multi-single plunger pump recombination control asymmetric hydraulic cylinder

A hydraulic system and hydraulic cylinder technology, applied in the field of hydraulic cylinder control, can solve the problems of increasing the complexity and design difficulty of the hydraulic system, and achieve the effects of simple structure, continuous operation and improved motion characteristics

Active Publication Date: 2016-12-14
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to ensure the effective operation of the asymmetric cylinder, it is often necessary to introduce an additional small-displacement charge pump and charge control valve in the hydraulic system for oil replenishment, which greatly increases the complexity and design difficulty of the hydraulic system

Method used

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  • Closed hydraulic system of multi-single plunger pump recombination control asymmetric hydraulic cylinder
  • Closed hydraulic system of multi-single plunger pump recombination control asymmetric hydraulic cylinder

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Embodiment Construction

[0019] The present invention will be further described below through specific embodiments.

[0020] refer to figure 1 , a closed hydraulic system in which multiple single-piston pumps are recombined to control an asymmetric hydraulic cylinder, including a fuel tank 10 and a hydraulic cylinder 20, the hydraulic cylinder 20 is an asymmetric hydraulic cylinder, which is provided with a large cavity oil port A and a small cavity oil mouth B. It also includes two one-way valves 30, two safety valves 40 and multiple sets of single plunger pumps. The first oil inlet and outlet ports 56 of the multiple groups of single plunger pumps are all connected with the large cavity oil port A, wherein the second oil inlet and outlet ports 57 of at least two groups of single plunger pumps are connected with the small cavity oil port B, and the remaining groups The second oil inlet and outlet port 57 of the single plunger pump communicates with the oil tank 10 to compensate the flow difference ...

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Abstract

The invention discloses a closed hydraulic system of a multi-single plunger pump recombination control asymmetric hydraulic cylinder. The closed hydraulic system comprises an oil tank, a hydraulic cylinder, two one-way valves, two safety valves and multiple sets of single plunger pumps; first oil ports of the multiple sets of single plunger pumps are all communicated with a large cavity oil port; second oil ports of at least two sets of single plunger pumps are communicated with a small cavity oil port; second oil ports of the rest sets of single plunger pumps are communicated with an oil tank to compensate a flow difference of the hydraulic cylinder; outlets of the two one-way valves are respectively connected with the large cavity oil port and the small cavity oil port, and inlets of the two one-way valves are communicated with the oil tank; and inlets of the two safety valves are respectively connected with the large cavity oil port and the small cavity oil port, and outlets of the two safety valves are communicated with the oil tank. The closed hydraulic system is simple in structure, high in reliability and low in output flow pressure pulsation.

Description

technical field [0001] The invention relates to the field of hydraulic cylinder control, in particular to a closed hydraulic system in which multiple single plunger pumps recombine and control asymmetrical hydraulic cylinders. Background technique [0002] Hydraulic transmission is widely used in various industrial fields due to its advantages of high power density and easy realization of linear motion. However, the existing hydraulic transmission system often has the problem of low efficiency, among which the throttling loss is one of the main factors causing the low efficiency of the hydraulic system. The traditional closed pump control hydraulic system uses a traditional closed plunger pump to directly drive a single actuator, and controls the speed of the actuator by controlling the displacement and speed of the traditional variable pump. Since the system adopts the volume control instead of the throttling control, the throttling loss of the system can be eliminated, th...

Claims

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Application Information

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IPC IPC(8): F15B15/18
CPCF15B15/18
Inventor 陈其怀任好玲林添良付胜杰陈强吕若曦
Owner HUAQIAO UNIVERSITY
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