Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rotary hydraulic system and construction machinery

A technology for hydraulic systems and construction machinery, applied in the hydraulic field, can solve the problems of affecting the control performance, brake lock, strong impact, etc., to prevent the car from slipping, reduce the impact feeling, and improve the control performance.

Active Publication Date: 2013-07-17
SANY AUTOMOBILE HOISTING MACHINERY
View PDF6 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose a slewing hydraulic system and engineering machinery to solve the problem of strong impact caused by brake lock, which affects the handling performance and operating comfort

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
  • Rotary hydraulic system and construction machinery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0040] figure 1 It is the hydraulic schematic diagram of the rotary hydraulic system described in the embodiment of the present invention. As shown in the figure, the rotary hydraulic system described in this embodiment includes a rotary motor 1, a brake cylinder 4, a main valve 2, a shuttle valve 5 and a brake Dynamic anti-lock valve 3. The main valve 2 is a three-position six-way hydraulic pilot proportional valve. The brake anti-lock valve 3 includes a first check valve 32 and a hydraulic control reversing valve 31; 1 The port is connected with the A port of the rotary motor 1, and the B port of the main valve 2 is connected with the P port of the shuttle valve 5 at the same time. 2 It comm...

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 a rotary hydraulic system and construction machinery. The rotary hydraulic system comprises a rotary motor, a brake oil cylinder, a main valve, a shuttle valve and a brake anti-lock valve. The brake anti-lock valve includes a first check valve and a hydraulic-control selector valve. An oil return port T of the main valve is communicated with a hydraulic control end Y of the hydraulic-control selector valve. An oil inlet port P is communicated with an oil return port of the first check valve and a port B of the hydraulic-control selector valve synchronously. A hydraulic control end X of the hydraulic-control selector valve is communicated with a port A of the shuttle valve. The port A of the shuttle valve and an oil outlet port of the first check valve are communicated with the brake oil cylinder synchronously. The main valve is communicated with the oil inlet port P and the oil return port T while a valve core is positioned at the center. When a rotary mechanism is rapidly stopped, the hydraulic-control selector valve is closed, the oil inlet port P of the main valve is communicated with the brake oil cylinder through the first check valve to prevent a brake from being closed, and accordingly, only if the rotary mechanism shakes, the brake is not locked, sense of impact is greatly reduced, and operational performance and operational comfort of rotary actions are further improved.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a rotary hydraulic system and engineering machinery. Background technique [0002] Generally speaking, the rotary brake valves of the existing construction machinery rotary mechanisms are generally one-way throttle valves, so the delayed closing time of the brake depends on the fixed damping of the one-way throttle valve. Under working conditions, no matter how the operation turns, the delay closing time of the brake is a fixed value. However, the moment of inertia of the slewing mechanism of construction machinery is relatively large, and it is easy to cause slewing impact when it stops. Therefore, when the slewing stops quickly, if the slewing mechanism on the vehicle has not stopped shaking, the brake is locked at this time, which will lead to a stronger shock feeling and serious It affects the handling performance and operating comfort of the slewing action. Contents of...

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): F15B11/02
Inventor 易迪升侯敏刘正雷
Owner SANY AUTOMOBILE HOISTING MACHINERY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com