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

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...

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

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