2, the system pressure imbalance
Pressure changes are inevitable in the working hydraulic system. For example, the change of the effective compression ratio of the accumulator and the pressure shock caused by the backpressure effect in the dual working hydraulic cylinder, but the change of the pressure is best defined within the range of 5% in the whole working cycle. If the pressure is obviously insufficient or too large, it is the precursor of the system fault. On the one hand is the lack of general signs of pressure system oil or pump failure, may also be due to failure caused by the overflow valve or bypass valve, then to reason of the lack of specific analysis of pressure, take corresponding countermeasures to adjust or repair; on the other hand, excessive pressure may be due to partial blockage caused by high pressure will increase the oil system. The liquid oil heat so that the temperature rise. There are two kinds of jam; a valve plug, then need cleaning valve, when necessary, replaced with the valve anti blocking function; the other one is clogged oil filter, which is to be replaced according to the oil filter using time and conditions of regular inspection and cleaning, when necessary.
3, system failure
The so-called system failure is the operation of the system, the system can not or not fully able to work according to the wishes of the operator, the pressure does not rise when the rise, the execution of the element does not move or reverse action. When the system fails, it should first find out whether the failure is caused by the obvious fault or by the combination of several factors. The more complex the system loop, the closer the control and action of each component is, the more difficult it is to solve. The following examples illustrate the cause of the irregular action of the component. As the hydraulic cylinder action is usually irregular, whether mixed with air check system, such as air, you should analyze the reasons for leakage and no air exhaust; it should check whether the implementation of components, implementation of the work table whether the element rules, rod bending or not, this kind of mechanical failure can also lead to irregular movement.