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A deceleration control method for hydraulically driven equipment

A technology for driving equipment and deceleration control, applied in the direction of electric speed/acceleration control, etc., can solve the problems of increasing the wear and tear of the control mechanism, consuming manpower and time, and reducing the control accuracy, so as to improve the control accuracy, prevent the operation cycle, ensure The effect of safe operation

Active Publication Date: 2016-08-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this processing method is based on personal experience, the reliability is poor, and it consumes a lot of manpower and time.
Moreover, repeatedly adjusting the flow control mechanism in the hydraulic system will increase the wear of the control mechanism and reduce its control accuracy.

Method used

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  • A deceleration control method for hydraulically driven equipment
  • A deceleration control method for hydraulically driven equipment
  • A deceleration control method for hydraulically driven equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] In Embodiment 1, the control method of the present invention is used for loading and unloading heavy-duty hydraulic drive equipment. The hydraulic drive equipment is a hydraulically driven slab transport equipment. The amount of oil delivered by the pump 10.

[0078] According to Embodiment 1, the basic control parameters set in step S100 include the safe contact time t4 for the main pump to run at the safe contact speed V2, and the initial deceleration point position for the main pump to change from the working speed V1 to the safe contact speed V2 S J 0, the total stroke S of the hydraulic drive equipment Z , and the allowable deviation range △S of the hydraulic drive equipment to the stop point, where △S>0.

[0079] In Example 1, according to the process requirements, the total running distance (total stroke) S of the hydraulic cylinder of the slab transport equipment Z =500mm, operating speed V1=108mm / s, safe touch speed V2=13.5mm / s. Switching position between o...

Embodiment 2

[0104] In embodiment 2, the control method of the present invention is used for the same hydraulically driven slab transport equipment as in embodiment 1, and the basic control parameters set in step S100 are the same as in embodiment 1, and the basic control parameters in embodiment 2 are also Including displacement deviation amplification factor k. The displacement deviation amplification factor k is used to determine the correction amount of the deceleration point position according to the displacement deviation of the deceleration point. In order to ensure the correction effect of the deceleration point position, the displacement deviation amplification factor k should be greater than 1. In this embodiment, k=1.1. According to the technical requirements of the hydraulically driven slab transport equipment of this embodiment, combined with the technical solution of the present invention, the set values ​​of each basic control parameter are shown in the following table:

[0...

Embodiment 3

[0132] In embodiment 3, the control method of the present invention is used for the same hydraulically driven slab transportation equipment as in embodiment 1 and embodiment 2, and the basic control parameters set in step S100 are the same as in embodiment 2, and in embodiment 3 The basic control parameters also include the displacement deviation amplification factor k. Embodiment 3 not only compensates the speed of the main pump but also adjusts the position of the deceleration point, including Figure 4 The entire control process of the secondary speed compensation and the secondary deceleration point position in the control flow chart shown, the specific control steps are as follows:

[0133] According to the technical requirements of the hydraulically driven slab transport equipment of this embodiment, combined with the technical solution of the present invention, step S100 sets various basic control parameters, and the setting values ​​of each parameter are the same as th...

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Abstract

The invention provides a method for deceleration control over a hydraulic drive device and relates to control over hydraulic drive devices, in particular to deceleration control over the hydraulic drive device for loading, unloading and conveying heavy loads. The method comprises the following steps that basic control parameters of deceleration control over the hydraulic drive device are set; actual operation parameters of the hydraulic drive device are obtained and compared with the basic control parameters, so that whether the operation speed of the hydraulic drive device is extremely high or not is judged; if the speed is extremely high, compensation is conducted on the speed of a main pump; if the speed is still extremely high after speed compensation, the position of a deceleration point is corrected; if the speed is still extremely high after speed compensation and deceleration point correction, an alarm signal is output. The method that the speed is adjusted and the position of the deceleration point is adjusted is adopted, the operation speed of the device is automatically adjusted, effective deceleration of the hydraulic drive device can be guaranteed, impact on the mechanical device is minimized, and safe operation of the device is guaranteed; the control accuracy can be improved, a total operation period of the device can be prevented from delaying, and operation efficiency of the hydraulic drive device is improved.

Description

technical field [0001] The invention relates to the control of hydraulic drive equipment, in particular to the deceleration control of hydraulic drive equipment used for loading, unloading and transporting heavy loads. Background technique [0002] In industrial production, many large-scale equipment driven by hydraulic pressure, no matter how the speed changes during the movement process, generally there will be a deceleration process before stopping, that is, from the operating speed ( figure 1 In V1) into the safe touch speed ( figure 1 In the control process of V2), and the safe touch speed ( figure 1 The control effect of middle V2) directly affects the size of equipment impact when parking. [0003] The Chinese invention patent "Deceleration Control Method and Device of the Operating Mechanism of Lifting and Unloading Equipment" (invention patent number: ZL 200710040402.4 authorized announcement number: CN100551812C) discloses a deceleration control method of the ope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D13/62
Inventor 华良陈志荣费正峰
Owner BAOSHAN IRON & STEEL CO LTD