Hydraulic system How to master the oil flow? Shanghai Youwei Hydraulic Equipment Company pointed out that the hydraulic system is mainly composed of light signal control and hydraulic power in the process of operation, and the light signal control is used to drive the control valve action in the hydraulic power side. The hydraulic power is represented by a circuit diagram to show the relationship between different functional components.
The hydraulic source in the hydraulic system includes hydraulic pump, hydraulic auxiliary components and motor. The hydraulic control unilaterally contains various control valves, which are mainly used to control the flow, pressure and deviation of working oil in the process of application; The execution side contains hydraulic cylinder or motor, which can be selected according to the actual requirements.
In the process of analysis and design, the hydraulic system will generally accept the block diagram to show the actual operation status of the equipment. The empty arrow represents the light signal flow, while the solid arrow represents the flow. The sequence of actions in the basic hydraulic circuit - master the reversing and spring return of the element (two position four-way reversing valve), the extension and retraction of the actuating element (double benefit hydraulic cylinder), and the opening and closing of the overflow valve.
The hydraulic system can number all circuits in sequence according to the working principle of the system. If the starting element number is 0, the master element identifier associated with it is 1. If the element identifier corresponding to the extension of the actuator is even, the element identifier corresponding to the retraction of the actuator is odd. Not only the hydraulic circuit but also the actual equipment should be numbered in order to find system faults.
How to prevent leakage of hydraulic system? Shanghai Youwei Hydraulic Equipment Co., Ltd. pointed out that the rubber ring should be replaced for oil leakage caused by pressure deformation of the seal, and the seal failure caused by high temperature should wipe the source of high temperature along the way of replacing the rubber ring. When repairing the damaged rubber ring caused by excessive spare time of the parts alliance, it is not allowed to simply replace the rubber ring. The method of replacing parts should be used to improve spare time of the parts alliance and avoid repeated doubts about the seals.
In the process of work, it is one of the effective ways to prevent leakage to reduce the number of oil pipeline discussions and flanges, widely select superposition valves, cartridge valves and plate valves in the planning, select the method of integrated block combination, and reduce the pipeline leakage points.
In addition, the hydraulic valve station in the hydraulic system can be placed closer to the implementation components, which can greatly shorten the total length of the hydraulic pipeline, and then reduce the number of pipe discussions.
The hydraulic blow and mechanical oscillation directly or indirectly affect the system, resulting in pipeline looseness and venting. Hydraulic blow is often caused by quick reversing. Therefore, under the condition that the working condition allows, even when the reversing is extended, that is, the valve core is equipped with a buffer groove, a buffer cone layout, or the valve is equipped with a master valve for the extended reversing.
The hydraulic system should be far away from the external vibration sources, and the pipeline should be reasonably equipped with pipe clamps. The pump source can use shock absorber, high-pressure hose, compensation absorption or pulse absorber to eliminate pressure pulsation and reduce vibration.
