Speed control method for free falling winch and method for implementing method

A speed control device and speed control technology, applied in the direction of the hoisting device, etc., can solve the problems of difficult speed control of the hoisting machine, reduced working reliability of the hoisting and hoisting system, large impact, etc., and achieves simple structure, smooth braking, and reduced wear and tear. Effect

Active Publication Date: 2010-06-16
CHINA ZHONGHUA GEOTECHN ENG
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the use of multi-ratio and high-height hoisting systems for free-falling with no load, it becomes very difficult to control the speed of the hoist, and the impact of the brake on the mechanism is getting bigger and bigger, and the friction band of the brake ( The rapid wear and failure of the sheet) reduces the reliability of the hoisting system

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
  • Speed control method for free falling winch and method for implementing method
  • Speed control method for free falling winch and method for implementing method
  • Speed control method for free falling winch and method for implementing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0029] Another embodiment of the present invention: the hydraulic pump can be a one-way pump, and a clutch is added between the transmission shaft of the hydraulic pump and the pinion output shaft. When the reel is lifted, the pinion is disconnected from the hydraulic pump, and when the reel falls freely, the pinion is connected to the hydraulic pump. At this time, the flow control valve can be a throttle valve.

[0030] In the hydraulic circuit using a two-way hydraulic pump, when the winch is lifted, the reel drives the large gear to rotate, the large gear drives the small gear to rotate, and the small gear drives the two-way hydraulic pump to rotate counterclockwise, as image 3 As shown, the oil enters the pipeline through the oil suction pipe 5, pushes open the one-way valve B52 and the one-way valve of the flow control valve 23, enters the two-way hydraulic pump through the inlet and outlet B, and is discharged through the inlet and outlet A, and pushes the one-way valve...

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 speed control method for a free falling winch and a method for implementing the method. The method effectively controls the speed of a free falling winch system by using the throttling action produced by a hydraulic system. The device comprises a transmission device and a hydraulic transmission system, wherein the hydraulic transmission system comprises a hydraulic pump, a pipeline, a flow control valve, a safety valve and an oil tank; and one end of the transmission device is connected with a winding drum, while the other end is connected with a hydraulic pump. The method can conveniently set and control the maximum free falling speed so that the free falling speed becomes stable after a certain falling height and is not increased along with the change of the falling height; because the production of high speed is controlled, the braking force or the braking time required by a brake is reduced, and the braking becomes smooth so as to reduce the impact on the mechanism; and the abrasion of a braking band (sheet) is reduced. An energy accumulator is connected between the hydraulic pump and the flow control valve for providing a new path for energy reclamation and reutilization and making a contribution to energy conservation and emission reduction.

Description

technical field [0001] The invention belongs to the technical field of hoisting machinery, in particular to a method for controlling the speed of a free-fall hoist using hydraulic technology and a device for implementing the method. Background technique [0002] In order to achieve the purpose of high efficiency and energy saving, more and more hoisting machines with free-falling function are used in the hoisting system of cranes. However, with the use of multi-ratio and high-height hoisting systems for free-falling with no load, it becomes very difficult to control the speed of the hoist, and the impact of the brake on the mechanism is getting bigger and bigger, and the friction band of the brake ( The rapid wear and failure of the sheet) reduces the reliability of the winch lifting system. Contents of the invention [0003] The object of the present invention is to provide a speed control method of a free-falling winch and a device for implementing the method, which use...

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): B66D5/26
Inventor 王锡良
Owner CHINA ZHONGHUA GEOTECHN ENG
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