Control valve capable of achieving two-way variable and open hydraulic pump

A two-way variable, open hydraulic technology, applied in the field of hydraulic systems, can solve the problems that cannot be used in the energy recovery system, can not realize the two-way variable of the swash plate, can not realize the electric proportional control of the pump displacement, and achieve the effect of low component cost

Active Publication Date: 2017-05-31
XUZHOU HEAVY MASCH CO LTD
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stroke limitation of the differential cylinder and the function limitation of the variable control valve make it impossible for this series of pumps to realize the two-way variable displacement of the swash plate.
[0004] Therefore, the exi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control valve capable of achieving two-way variable and open hydraulic pump
  • Control valve capable of achieving two-way variable and open hydraulic pump
  • Control valve capable of achieving two-way variable and open hydraulic pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described here are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for describing specific implementations. The purpose of the examples is not to limit the invention.

[0034] An open hydraulic pump, comprising a pump body 15 and a variable control valve. The pump body 15 is provided with a variable cylinder 14, a reset cylinder 16, and a shuttle valve II25;

[0035] The va...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a control valve capable of achieving a two-way variable and an open hydraulic pump and belongs to the technical field of hydraulic systems. A pump swash plate can achieve the two-way variable by designing a variable control mechanism of an open plunger pump, and the variable control mechanism of the pump can be controlled stably by designing a variable control valve of the pump. A pressure ratio of a large cavity of a variable cylinder of the variable mechanism of the hydraulic pump is changed by logic control of two proportion electromagnetic valves on the variable control valve; the variable cylinder is pushed to extend and contract; and the extension and contraction of the variable cylinder pushes the swash plate to swing to achieve a purpose of positive and negative swing angles of the swash plate. The swing angle of the swash plate or displacement of the variable cylinder in a movement process of the swash plate are fed back to a feedback spring to achieve angle/displacement-force feedback, and a feedback force and electromagnetic forces of the proportion electromagnetic valve achieve force balance to achieve stable control. The two-way variable of the swash plate is effectively achieved, and both a pump function and a motor function can be achieved.

Description

Technical field [0001] The invention relates to a control valve and an open hydraulic pump capable of realizing bidirectional variables, and belongs to the technical field of hydraulic systems. Background technique [0002] At present, the commonly used hydraulic pumps on the market are Rexroth's A10VO / 31 series and A11V series plunger pumps. This series of oil pumps are open plunger pumps. The pump displacement is adjusted by a pair of differential variable cylinders to push the swash plate to swing. The variable control valve controls the pressure of the fluid entering the variable cylinder, pushing the variable cylinder to different positions, corresponding to different swing angles of the swash plate; the cylinder rod of the reset cylinder is connected with the feedback rod, and the feedback rod acts on the control valve core through a spring to realize the variable Controlled displacement-force feedback. [0003] The differential cylinder is composed of a variable cylinder, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F04B7/02F04B49/22F04B53/00F04B53/10F15B11/00
CPCF04B7/02F04B49/22F04B53/00F04B53/10F15B11/00
Inventor 东权仲维超杜孝杰邓永建王帅韩建营
Owner XUZHOU HEAVY MASCH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap