Oil cylinder buffering pressure control method and system and excavator

A technology for pressure control and excavators, applied in fluid pressure actuation system components, fluid pressure actuation devices, mechanical equipment, etc., can solve problems such as piston seal failure, excessive buffer pressure, piston deformation, etc.

Inactive Publication Date: 2020-08-14
SANY HEAVY MACHINERY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an oil cylinder buffer pressure control method, system and excavator to alleviate the technical problems of the excessive buffer pressure provided by the buffer device after the excavator replaces the working parts, causing piston deformation, piston seal failure and other technical problems

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
  • Oil cylinder buffering pressure control method and system and excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] Such as figure 1 As shown, the oil cylinder buffer pressure control method provided by the embodiment of the present invention includes the steps of: obtaining the buffer pressure value provided by the buffer device inside the oil cylinder 100; comparing the detected buffer pressure value with the preset pressure Values ​​are compared; when the detected buffer pressure value is greater than the preset pressure value, the flow rate of hydraulic oil supplied to the oil cylinder 100 and used for piston movement is re...

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 provides an oil cylinder buffering pressure control method and system and an excavator, and relates to the technical field of excavators. The oil cylinder buffering pressure control method comprises the steps that a buffering pressure value provided by a buffering device located inside an oil cylinder is acquired; the buffering pressure value obtained through detection is compared with a preset pressure value; and when the buffering pressure value obtained through detection is larger than the preset pressure value, the flow of hydraulic oil which is supplied to the oil cylinder and used for movement of a piston is reduced. When the piston of the oil cylinder moves towards the end with the buffering device, the buffering pressure provided by the buffering device is increased along with the process that the piston gets close to the buffering device, and when the buffering pressure value obtained through detection is larger than the preset value, the flow of the hydraulic oil which is inputted into the oil cylinder is reduced. The flow is reduced, the movement speed of the oil cylinder is reduced, and the corresponding buffering pressure is reduced. By means of the oil cylinder buffering pressure control method, the buffering device can be prevented from causing the huge impact on the piston of the oil cylinder, and the service life of the oil cylinder is prolonged.

Description

technical field [0001] The invention relates to the technical field of excavators, in particular to an oil cylinder buffer pressure control method, system and excavator. Background technique [0002] Excavators include boom cylinders, bucket cylinders and stick cylinders. Generally, there are buffer devices in the cylinders. When hydraulic excavator cylinders drive working parts with large mass and fast movement speed, such as buckets and breakers, The buffer device can eliminate the mechanical impact between the piston and the cylinder head caused by the inertial force of the moving parts and the hydraulic pressure, and avoid failures such as damage to the cylinder head. The greater the cushioning pressure, the better the cushioning effect of the cylinder. However, if the buffer pressure is too high, the piston of the oil cylinder will be subjected to a large impact force, which will easily cause deformation of the piston, failure of the piston seal and other failures. ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/22F15B21/08
CPCF15B15/22F15B21/08
Inventor 王守伏马卫强郭文博尹满义
Owner SANY HEAVY MACHINERY
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