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Hydraulic control system for variable loads

A hydraulic control system and variable load technology, applied in fluid pressure actuation system components, load suspension components, fluid pressure actuation devices, etc. Problems that affect the lifting efficiency of the jib

Pending Publication Date: 2022-01-21
WUHAN MARINE MACHINERY PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the oil cylinder moves at a constant speed, it will take a relatively long time for the boom to move to the predetermined position, which will seriously affect the lifting efficiency of the boom, and then affect the working efficiency of the winch

Method used

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  • Hydraulic control system for variable loads
  • Hydraulic control system for variable loads
  • Hydraulic control system for variable loads

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Embodiment Construction

[0046] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0047] In order to clearly illustrate the hydraulic control system for variable loads provided by the embodiments of the present disclosure, the connection relationship between the boom and the actuator cylinder is first introduced here.

[0048] figure 1 is the working state diagram of the jib provided by the embodiment of the present disclosure, combined with figure 1 , the middle part of the boom 100 is connected with the piston rod of the actuator cylinder 4, and the end of the boom 100 is connected with the rotation of the winch through the rotating shaft. When the piston rod of the actuator cylinder 4 is stretched out, the boom 100 rotates and rises with the axis of rotation as the axis. On the contrary, when the piston rod...

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Abstract

The invention provides a hydraulic control system for variable loads, and belongs to the technical field of hydraulic control. The hydraulic control system comprises a power output unit, a flow control unit, two lifting control units and two execution oil cylinders, and the two execution oil cylinders correspond to the two lifting control units in a one-to-one mode. The flow control unit comprises a first reversing valve and a flow distributing and collecting valve, each lifting control unit comprises a first balance valve, a second balance valve and a hydraulic control reversing valve, and a first oil port of the first balance valve communicates with a second oil port of the corresponding flow distributing and collecting valve. A second oil port of the first balance valve communicates with a rodless cavity of the corresponding execution oil cylinder, and a control oil port of the first balance valve communicates with a second working oil port of the first reversing valve. According to the control system, a cargo boom can be lifted at a high speed when the load is relatively light, and the cargo boom can be lifted at a low speed when the load is relatively large, so that the lifting efficiency of the cargo boom is improved.

Description

technical field [0001] The disclosure belongs to the technical field of hydraulic drive control, in particular to a hydraulic control system for variable loads. Background technique [0002] A winch, also known as a hoist, is a light and small lifting device that uses a drum to wind a wire rope or chain to lift or pull heavy objects. In actual use, it is often necessary to lift heavy objects by rotating and rising the lifting arm of the winch. The lifting arm frame includes an arm frame and two oil cylinders, and the two oil cylinders are symmetrically arranged on both sides of the arm frame. The boom is driven in a circular motion by two oil cylinders to realize the rotation and rising of the boom. [0003] In the related art, the oil cylinder is controlled by a hydraulic control system. The hydraulic control system generally includes a power drive unit and a reversing valve. The hydraulic oil enters the reversing valve through the power drive unit, and then enters the tw...

Claims

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Application Information

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IPC IPC(8): B66C23/06B66C23/62B66C23/82B66C13/20F15B21/08F15B21/041F15B11/042F15B11/044F15B13/06
CPCB66C23/06B66C23/62B66C23/828B66C13/20F15B21/087F15B21/041F15B11/0426F15B11/044F15B13/06
Inventor 张三喜鄢勇方敏周虎
Owner WUHAN MARINE MACHINERY PLANT
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