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Crane lifting speed control method and device

A speed control device and speed control technology, which is applied in the field of crane lifting speed control and crane lifting speed control device, can solve problems such as poor operation experience, achieve the effects of avoiding risks, improving operation experience, and reducing operation difficulty

Active Publication Date: 2009-04-29
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even for experienced crane drivers, due to the need to control the maximum inclination angle of the operating handle when lifting different weights, it will cause poor operating experience

Method used

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  • Crane lifting speed control method and device
  • Crane lifting speed control method and device
  • Crane lifting speed control method and device

Examples

Experimental program
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Embodiment Construction

[0041] Please see figure 1 , This figure is a flow chart of the method for controlling the hoisting speed of a crane provided by the first embodiment of the present invention. The following describes the method for controlling the hoisting speed of a crane provided by the first embodiment of the present invention in conjunction with the flowchart. This method is used for cranes that use variable displacement hydraulic motors for hoisting and driving.

[0042] In step S101, the current actual hoisting weight of the crane is detected to obtain the actual hoisting weight.

[0043] Since the hoisting speed of the crane mainly depends on the real-time hoisting weight of the crane, it is necessary to obtain the actual hoisting weight of the crane in the current state through sensor detection, and use the actual hoisting weight as the basis for determining the hoisting speed. Since there is bound to be an error between the detected value and the actual value, the current lifting weight ...

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PUM

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Abstract

The invention discloses a lifting speed controlling method of cranes used in cranes adopting hydraulic motors with variable displacement and carrying out the hanging and driving by a volume-flow control method; the invention comprises that the steps of: obtaining measured lifting weight; calculating the maximum allowable lifting speed obtained under the measured lifting weight; determining the maximum allowable rotating speed N of the hydraulic motors with variable displacement driven by the implementation lifting; calculating the minimum displacement P of the hydraulic motors with variable displacement under the situation according to the maximum allowable rotating speed N and the maximum flow Q of a hydraulic system; and limiting the displacement of the hydraulic motors with variable displacement to be not less than minimum displacement P in the lifting process. Compared with the prior art, the method and the device provided by the invention can combine the crane measured lifting weight to limit the lifting speed within the allowed range, avoid the cranes from producing risks caused by a too fast lifting speed and reduce the operation difficulties of the cranes.

Description

Technical field [0001] The invention relates to a crane, in particular to a method for controlling the hoisting speed of the crane. The invention also provides a crane hoisting speed control device. Background technique [0002] Cranes are widely used construction machinery. Different types of cranes generally have lifting mechanisms for pulling heavy objects to a higher position. [0003] The function of the lifting mechanism is to change or maintain the position of the work object in the direction of gravity, including working conditions such as lifting, lowering and holding. The complete lifting mechanism includes power source, power transmission device, power adjustment device and spreader. The power source of the lifting mechanism is generally a prime mover such as an internal combustion engine or an electric motor. The power of the prime mover drives the spreader to move through the power transmission device and the power adjustment device, thereby realizing the movement of...

Claims

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Application Information

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IPC IPC(8): B66C13/18B66D1/44B66D1/08
Inventor 周翔吴智勇曹显利石培科
Owner SANY HEAVY IND CO LTD (CN)
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