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但如今传来弗朗西斯因盗别人7000元而进了监狱,姚明却没有任何举动。记者了解到,每到高峰期,这里的车速度缓慢,行人就和车流混在一起。麻艳说,在确定是自己班级的学生之后,她又在班级小范围询问,“魏甜甜马上就回复了,说是她们四个人。

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Analysis of three diseases of hydraulic system of hydraulic cutting machine

Author Clicks:Times2016-7-27 10:31:00【Big Middle Litter

Three big problem of hydraulic system hydraulic cutting machine and the solution is as follows:

1, fever

Due to the transmission medium (hydraulic oil) in the flow process are different parts of the flow, leading to the existence within a certain amount of liquid within the friction, and the liquid and the inner wall of the pipe there is friction between, these are the cause of the hydraulic oil temperature rise. Temperature rise will lead to increase in internal and external leakage, reduce the mechanical efficiency. At the same time, due to the higher temperature, the hydraulic oil will be expanded, resulting in increased compression, so that the control action can not be a good transfer. Solution: fever is the inherent characteristics of the hydraulic system, can not be eradicated can only be reduced. The use of good quality hydraulic oil, hydraulic piping layout should try to avoid the appearance of the elbow, the use of high-quality pipes and pipe fittings, hydraulic valves, etc..

2, vibration

One of the hydraulic vibration system of cutting machine is also a chronic illness. Due to the high speed flow of hydraulic oil in the pipeline and the impact caused by the valve opening and closing the impact of the system is the cause of vibration. Strong vibration will cause the system to control the movement of the error, it will make the system in some of the more sophisticated instrument errors, resulting in system failure. Solution: the hydraulic pipe should be fixed to avoid sharp bends. Avoiding the frequent change of the liquid flow direction, can not avoid the vibration measures should be done. The entire hydraulic system should have good damping measures, while avoiding the external forces on the system.

3, leakage

The leakage of the hydraulic system is divided into internal leakage and external leakage. Internal leakage refers to the process of leakage in the system, such as the hydraulic cylinder piston on both sides of the leak, the leakage between the valve spool and the valve body, etc.. Although the internal leakage will not produce the loss of hydraulic oil, but due to leakage, the established control actions may be affected, until the system failure. Leakage is the leakage between the system and the external environment. Hydraulic oil directly into the environment, in addition to the system will affect the working environment, but also cause the system pressure is not enough to cause trouble. The hydraulic oil leaking into the environment and the danger of fire. Solution: the use of better quality seals, improve the processing accuracy of the equipment.