Hydraulic unit in use if there is a temperature rise too high, you need to find out the reason and processed in a timely manner. Combined with the actual situation, mainly including what are the reasons? If the tank volume is too small, so will lead to the cooling area is not enough, not installed oil cooling unit, or is a cooling device but its capacity is too small.
Second is in the process of the hydraulic unit work, due to choose the speed of fast forward button, so that oil pump capacity of quantitative pump oil supply system run fast, in most of the work will have excess discharge from the relief valve discharge under high pressure and fever, resulting in abnormal temperature system. Moreover, if the system in the unloading circuit malfunction or for not setting unloading circuits, to stop work when the oil pump can not unloading, all the flow at high pressure pump overflow, overflow losses and fever, cause temperature rise. Bending system pipeline to go too long, too much, local pressure loss and the frictional pressure loss is big.
In addition, when using the hydraulic unit, if the components precision is not enough, or the assembly quality not beautiful, so will cause a large movement of mechanical friction loss. The mating parts fit clearance is too small, or use wear causes the clearance is too large, large amount of internal and external leakage, causing volume loss, such as the volumetric efficiency of the pump is reduced, temperature rising fast.
But in practice, on the working pressure of hydraulic unit adjustment is critical, usually is much higher than the actual needs. Sometimes it is because of sealed tight, or because of the increased seal damage, leakage had to raise the pressure to work. If the working environment field climate and working environment temperature is high, can also lead to high oil temperature rise significantly.
In addition to these points above, in the hydraulic unit during the work, on the choice of the oil is very important. And choose the oil viscosity is likely to lead to improper temperature rise too high. In fact, the viscosity viscous resistance is big, the viscosity is too small leakage, two cases can cause heating temperature.
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