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Valve oil supplement method for series connection cylinders and apparatus therefor

A technology of connecting oil cylinders and replenishing oil, which is used in fluid pressure actuating devices, servo meter circuits, fluid pressure actuating system components, etc. problems, to achieve the effect of reducing production cost and processing difficulty, simple structure, and improving reliability

Active Publication Date: 2006-04-26
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] 1. The piston seal has high requirements, and general seals cannot meet the requirements, which increases the difficulty of sealing and reduces the working reliability;
[0005] 2. Limited by the seal, the oil supply hole cannot be enlarged, and the oil supply capacity is limited;
[0006] 3. Increased the difficulty of making the oil cylinder

Method used

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  • Valve oil supplement method for series connection cylinders and apparatus therefor
  • Valve oil supplement method for series connection cylinders and apparatus therefor
  • Valve oil supplement method for series connection cylinders and apparatus therefor

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] A method for replenishing oil to a valve of a series oil cylinder of the present invention, that is, at first respectively check whether the two piston rods (left piston rod 2 and right piston rod 5) of the series oil cylinder reach the normal forward position and the normal retraction position when working. Position detection, the detected position information is transmitted to the controller 7, the controller 7 judges according to the position signal and controls the solenoid valve 4 communicated with the communication chamber 3 of the series oil cylinder, and the communication chamber 3 of the series oil cylinder is controlled by the solenoid valve 4 Fill or drain oil. In the process of judging the position signal, when it is judged that the forward piston rod of the tandem oil cylinder has reached the normal forward position, but the retracted pist...

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Abstract

The invention discloses a valve oil-feed method in the serial hydro-cylinder, which comprises the following parts: piston shaft position information gathering device, controller and oil-feed or oil-drain electromagnetic valve. The working elementary comprises the following steps: detecting two piston shaft position of the serial oil cylinder; sending the detecting signal to the controller to control the electromagnetic valve through the serial cavity, which proceeds oil-feed or oil-drain operation. The invention can monitor and adjust the oil quantity in time, whose structure is simple, feed ability is strong and reliability is high.

Description

technical field [0001] The invention mainly relates to a method and a device for oil supplementation of valves used in serial oil cylinders. Background technique [0002] In the prior art, in the field of construction machinery, two oil cylinders are often used in series, such as the main oil cylinder in concrete pumping machinery. During use, due to the internal leakage of the valve or cylinder in the system, the oil volume in the connecting cavity of the cylinder will change. If measures are not taken in time, the stroke will be shortened, and as time accumulates, the stroke of the cylinder will eventually be caused. All lost. For example, if figure 1 As shown, due to the increase of the oil volume in the communication chamber 3, the right piston rod 5 is not stretched out in place; figure 2 As shown, due to the reduction of the oil volume in the communication chamber 3, the retraction of the left piston rod 2 is not in place. In order to solve this problem, the curre...

Claims

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Application Information

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IPC IPC(8): F15B21/02
CPCF15B21/08F15B2211/7121F15B2211/7053F15B2211/6336
Inventor 易小刚陈林
Owner SANY HEAVY IND CO LTD (CN)
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