Fixed fly jib stepless amplitude-variation control system for crane and crane

A control system and fixed pair technology, applied in cranes, load hanging components, transportation and packaging, etc., can solve the problems of narrow speed regulation range, low hoisting performance, poor fretting performance, etc., and achieve a wide speed regulation range, Good micro-motion performance

Active Publication Date: 2014-10-01
XUZHOU HEAVY MASCH CO LTD
View PDF9 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing fixed jib stepless luffing system has the following disadvantages: 1. The displacement of the oil pump is fixed, the speed regulation range is narrow, and the fretting performance is poor; 2. The system pressure setting is low, the size of the oil cylinder is large, and the lifting performance is low; 3. There is no oil cylinder pressure maintaining device, which cannot prevent the danger of internal leakage of the oil cylinder

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
  • Fixed fly jib stepless amplitude-variation control system for crane and crane
  • Fixed fly jib stepless amplitude-variation control system for crane and crane
  • Fixed fly jib stepless amplitude-variation control system for crane and crane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] It should be noted that: any technical feature and any technical solution in this embodiment are one or more of a variety of optional technical features or optional technical solutions. All the alternative technical features and alternative technical solutions of the present invention are cited, and it is not convenient for the implementation of each technical feature to emphasize that it is one of the optional multiple implementation modes, so those skilled in the art should know: Any technical features and any technical solutions in the embodiments do not limit the protection scope of the present invention, and the protection scope of the present invention should include any alternative technical solutions that those skilled in the art can think of without creative efforts.

[0029] For the convenience of desc...

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 relates a fixed fly jib stepless amplitude-variation control system for a crane and the crane. The control system comprises an electronic proportional pressure-reducing valve, a variable pump, a first reversing valve, and a hydraulic oil cylinder for varying the amplitude of a fixed fly jib, wherein the first reversing valve is positioned on an oil line between the variable pump and the hydraulic oil cylinder; the pressure oil output by the variable pump is input in the hydraulic oil cylinder via the first reversing valve; the electronic proportional pressure-reducing valve controls the discharge volume of the output pressure oil of the variable pump. The control system provided by the invention utilizes the electronic proportional pressure-reducing valve for controlling the discharge volume of the variable pump so as to realize the continuous variation of the discharge value of the variable pump, and is wide in speed regulating range and good in jogging property.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a stepless amplitude variable control system for a fixed jib used in a crane and a crane. Background technique [0002] On modern hoisting machinery, as the tonnage increases, the length and weight of the outrigger are also increasing, so the fixed jib becomes an important tool for extending the length of the outrigger. However, the conventional fixed jib can only achieve 0°, 15° and 30° range changes. When encountering a narrow space at a high place, it will not be able to achieve hoisting, which will eventually bring great difficulties and dangers to the user's installation. [0003] The electric proportional pressure reducing valve can flexibly use the current signal, and by changing the magnitude of the current, the output pressure of the electric proportional pressure reducing valve can be changed with the change of the current. [0004] The existing fixed jib stepless ...

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): B66C23/64B66C23/82B66C13/20
Inventor 单增海胡小冬张晓磊焦国旺
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