What are the disadvantages of hydraulic system

1, fever As the transmission medium (hydraulic oil) in the flow of the existence of various parts of the flow rate of the different, resulting in a certain internal friction within the liquid, while the liquid and the pipe wall friction between the internal, which is leading to the hydraulic oil temperature The reason for the rise. Increased temperature will lead to increased internal and external leakage, reducing its mechanical efficiency. At the same time due to the higher temperature, the hydraulic oil will swell, resulting in increased compressibility, so that the control action can not be passed very well. The solution: fever is an inherent feature of the hydraulic system can not be eradicated can only be minimized. The use of good quality hydraulic oil, hydraulic piping layout should try to avoid the emergence of elbows, the use of high-quality pipe and fittings, hydraulic valves and so on. 2, vibration Vibration hydraulic system is also one of its chronic diseases. The system vibrates because of the high-speed flow of hydraulic oil in the pipeline and the impact of the valve opening and closing. Strong vibration will lead to system control error occurs, but also make some of the more sophisticated system error, resulting in system failure. The solution: hydraulic pump pipe should be fixed, to avoid sharp bends. Avoid frequent changes in the direction of flow, can not be avoided when the vibration reduction measures should be made. The entire hydraulic system should have good damping measures, but also to avoid the impact of external sources on the system. 3, leakage Hydraulic system leakage is divided into internal leakage and external leakage. Leakage within the system refers to the leakage occurred inside the system, such as hydraulic cylinder piston on both sides of the leakage, control valve spool and valve body between the leakage. Although the internal leakage will not cause the loss of the hydraulic oil, due to the leakage, the predetermined control action may be affected until it causes the system failure. External leakage refers to the leakage that occurs between the system and the external environment. Direct leakage of hydraulic oil to the environment, in addition to the system will affect the working environment, but also lead to inadequate system pressure caused failure. Hydraulic oil leaking into the environment is also at risk of fire. The solution: the use of better quality seals, improve equipment processing accuracy.

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