Hydraulic control system
A hydraulic control system and hydraulic control technology, applied in the direction of fluid pressure actuators, servo motors, servo motor components, etc., can solve the problem that the safety of ships cannot be guaranteed to the greatest extent, and the explosion-proof solenoid valve and explosion-proof proportional valve produce electric sparks And other issues
Active Publication Date: 2021-07-20
WUHAN MARINE MACHINERY PLANT
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Problems solved by technology
[0004] However, the explosion-proof solenoid valve and the explosion-proof proportional valve still have the possibility of generating electric sparks during use, and the safety of the ship during navigation cannot be guaranteed to the greatest extent.
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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] figure 1 It is a schematic diagram of a hydraulic control system of an oil cylinder provided by an embodiment of the present invention, as shown in figure 1 As shown, a hydraulic control system includes a flow limiting valve 1 , a hydraulic control overflow valve 2 , a hydraulic control reversing valve 3 , a hydraulic control speed regulating valve 4 and a motor 5 .
[0024] The oil inlet of the flow limiting valve 1 is connected with the oil inlet point H of the hydraulic control system, the control oil port of the flow limiting valve 1 is connected with the oil inlet of the flow limiting valve 1, and the oil outlet of the flow limiting valve 1 is connected with the hydraulic control overflow The oil inlet of the flow valve 2 ...
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The invention discloses a hydraulic control system, which belongs to the field of hydraulic control. When controlling the motor, oil is delivered from the oil inlet point of the hydraulic control system, and the oil enters the control oil port of the flow limiting valve to control the flow limiting valve to the left position. The oil is limited by the flow limiting valve and then flows out of the oil outlet of the flow limiting valve. The oil pressure at the oil outlet of the flow limiting valve is equal to the oil pressure at the control oil port of the hydraulic control overflow valve. If the setting pressure of the hydraulic control relief valve is low, the oil pressure at the oil outlet of the restrictor valve is lower than the pressure at the control oil port of the hydraulic control reversing valve, the hydraulic control reversing valve does not change direction, and the hydraulic control The reversing valve is blocked from the hydraulic control speed regulating valve, the spool of the hydraulic control speed regulating valve is closed, and the oil does not enter the motor. Increase the set pressure of the hydraulic control relief valve, the oil pressure at the oil outlet of the restrictor valve is greater than the pressure at the control oil port of the hydraulic control reversing valve, the hydraulic control reversing valve changes direction, and the oil enters the motor . The whole is controlled by hydraulic pressure, and there is no problem of electric spark, which improves the safety of the ship when sailing.
Description
technical field [0001] The invention relates to the field of hydraulic control, in particular to a hydraulic control system. Background technique [0002] Ships are very commonly used means of water transportation, and some ships will be used to transport crude oil or chemicals. These ships that transport crude oil or chemicals need to ensure a very high explosion-proof level. [0003] Therefore, if there is a motor structure on these ships, the solenoid valves and proportional valves in the hydraulic system that control the motors are usually replaced with explosion-proof solenoid valves and explosion-proof proportional valves to ensure the explosion-proof level of the ship and improve the safety of the ship when sailing. [0004] However, the explosion-proof solenoid valve and the explosion-proof proportional valve still have the possibility of generating electric sparks during use, and the safety of the ship during navigation cannot be guaranteed to the greatest extent. ...
Claims
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IPC IPC(8): F15B13/04F15B11/08
CPCF15B11/08F15B13/0401
Inventor 鄢勇张三喜洪威
Owner WUHAN MARINE MACHINERY PLANT