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A proportional control device and control method for a cable winch with closed-loop feedback

A proportional control and closed-loop feedback technology, which is applied to valve devices, fluid pressure actuators, mechanical equipment, etc., can solve the problems of low control precision, achieve high control precision, high controllability, and improve safety.

Active Publication Date: 2017-12-29
WUHAN MARINE MACHINERY PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of low control precision existing in the prior art, and to provide a high control precision proportional control device and control method for the tow cable machine with closed-loop feedback

Method used

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  • A proportional control device and control method for a cable winch with closed-loop feedback
  • A proportional control device and control method for a cable winch with closed-loop feedback
  • A proportional control device and control method for a cable winch with closed-loop feedback

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A kind of proportional control device of the towing machine with closed-loop feedback, comprising an electric control handle 1 and a PLC control box 2, the signal output end of the electric control handle 1 is connected with the control signal input end 21 of the PLC control box 2; The proportional control device of the towing machine also includes an on-off valve 3, a proportional valve 4, a servo pump 5, a hydraulic motor 6 and an angle sensor 7; Electrically connected, the proportional signal output end 22 of the PLC control box 2 is electrically connected to the proportional signal control end 41 of the proportional valve 4; the servo pump 5 passes through the switch valve 3, the proportional valve 4 and the motor handle 61 of the hydraulic motor 6 The oil inlet port of the motor is connected to the oil circuit, the motor handle 61 is provided with an angle sensor 7, and the signal output end of the angle sensor 7 is electrically connected with the feedback signal in...

Embodiment 2

[0069] Embodiment 2 is basically the same as Embodiment 1 and its difference is:

[0070] The control method also includes:

[0071] Step 5: Stop and return to the original position. When the electric control handle 1 is pulled back to the middle position, the value of the control signal input value w of the PLC control box 2 is 0, and the switch signal output terminal 24 of the PLC control box 2 jumps to a low potential , the switch signal control terminal 31 is powered off, the control switch valve 3 is closed, and at the same time the proportional valve output control value y is forced to zero, the proportional valve 4 is closed, the oil circuit is closed at this time, and the motor handle 61 quickly returns to the middle position.

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PUM

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Abstract

The invention discloses a towing engine proportional control device with closed loop feedback. The device comprises an electronic control handle and a PLC control cabinet. The signal output end of the electronic control handle is connected with the signal input end of the PLC control cabinet. The towing engine proportional control device further comprises a switch valve, a proportional valve, a servo pump, a hydraulic motor and an angle sensor. The switching signal output end of the PLC control cabinet is electrically connected with the switching signal control end of the switch valve. The proportional signal output end of the PLC control cabinet is electrically connected with the proportional signal control end of the proportional valve. The servo pump is connected with an oil inlet pipeline of a handle of the hydraulic motor through the switch valve and the proportional valve in sequence. The angle sensor is arranged on the handle. The signal output end of the angle sensor is electrically connected with the feedback signal input end of the PLC control cabinet. The device is high in control precision, good in following capability and capable of rapidly shutting down a towing engine, and the handle of the hydraulic motor is prevented from shocking in the middle position.

Description

technical field [0001] The invention relates to a proportional control device, in particular to a proportional control device and a control method for a cable winch with closed-loop feedback, and is particularly suitable for improving control precision. Background technique [0002] The offshore platform is the main force of offshore oil and gas exploitation, but because it cannot propel itself, it needs multi-functional platform engineering ships for logistical support, among which three-purpose working ships (towling, anchoring, supply) are necessary auxiliary ships for platform logistical support . The towing winch is the key equipment of the three-purpose workboat, and the maneuverability of the towline winch is an important performance requirement for the three-purpose workboat when it operates at sea. The towing machine adopts electro-hydraulic drive mode, the motor drives the main pump station to provide motor power, and the motor drives the high-speed gear set to tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B9/00F15B13/02F16K37/00F15B21/08
CPCF15B9/00F15B13/02F15B21/08F15B2211/00F16K37/00
Inventor 陶诗飞高怡刘宁李建涛孙钊肖开明
Owner WUHAN MARINE MACHINERY PLANT
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