Control device and method for winching mechanism and winching mechanism test platform

Abstract

Disclosed is a test platform for a hoisting mechanism, which platform comprises a hoisting mechanism (20), the hoisting mechanism (20) comprising a hydraulic driving system for driving the hoisting mechanism (20), and the hydraulic driving system comprising a hydraulic motor (16) and a proportional solenoid valve (18) associated with the hydraulic motor (16). The test platform also comprises: a rotational speed detecting device (30) coupled to the hoisting mechanism, for detecting the rotational speed of the hoisting mechanism (20) and outputting a rotational signal indicating the rotational speed; a control device (40) electrically coupled to the rotational speed detecting device, the control device (40) being configured to receive the rotational speed signal from the rotational speed detecting device, compare the detected rotational speed and a predetermined standard rotational speed, generate a corresponding control signal according to the comparison result and output the control signal to the proportional solenoid valve (18) so as to regulate the output power of the hydraulic motor by means of adjusting the degree of opening of the proportional solenoid valve (18), and control the rotational speed of the hoisting mechanism so as to match the standard rotational speed, such that the rotational speed is not influenced by a temperature change of the hydraulic oil within the hydraulic driving system. Also disclosed are a control method and a control apparatus for a hoisting mechanism.

Description

technical field [0001] The invention relates to a control device and method for a hoisting mechanism and a hoisting mechanism test platform. Background technique [0002] The hoisting mechanism test platform is used to study and improve the problems of various hydraulically driven hoisting mechanisms on construction machinery, such as messy ropes, high friction, and difficulty in climbing floors. The hoisting mechanism test platform usually includes a hoisting mechanism, a bench and a control device. A gantry is similar to a crane, such as a tower crane. The winch mechanism is divided into motor frequency conversion drive type and hydraulic drive type. The hydraulic drive type winch mechanism is driven by a hydraulic drive system including a hydraulic motor. figure 1 A schematic diagram of such a hydraulic drive system is shown in . Such as figure 1 As shown, the hydraulic drive system mainly includes an oil tank 14 , a hydraulic motor 16 , a proportional solenoid valve ...

AI Technical Summary

Problems solved by technology

However, since the hydraulic oil in the hydraulic drive system is greatly affected by temperature, changes in temperature lead to changes in the viscosity of the hydraulic oil, thus resulting in changes in the output power of the hydraulic motor 16

This will cause the rotation speed of the hoisting mechanism to change under the condition that the driving current of the proportional solenoid valve 18 is kept the same at different temperatures

However, the hydraulically driven hoisting mechanism in the prior art cannot monitor the hoisting speed in real time, but only sets the fixed gear to correspond to the fixed driving current output when leaving the factory, or uses the continuous change of the stroke of the handle to change the driving current.

Neither of these two methods can well control the speed of the hoisting mechanism

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