When the hydraulic system is under pressure or completely free of pressure, it can be diagnosed as follows.
See if the hydraulic pump can output hydraulic oil. If there is no hydraulic oil output, it may be: the pump is not turning correctly; the parts are seriously worn or damaged; the suction pipe resistance is too large (the oil filter is clogged, the oil viscosity is too large, etc.) or the air leaks. If it is a new pump, it may be that the pump body has casting defects (such as blisters, etc.), so that the oil suction chamber communicates with the oil pressure chamber and loses the oil pressure capacity; the input power of the pump is insufficient or the pump shaft is broken, so that the pump output pressure is Can't reach work pressure or lose oil.
If the hydraulic pump has oil output, check each oil return pipe to see which component is spilled. If the overflow back to the oil pipe overflows, it may be caused by the low setting pressure of the valve. At this time, the relief valve regulating spring can be tightened. If the pressure does not change, the main valve core of the relief valve or the poppet of the pilot part may be dirty or stuck in the opening position due to corrosion; or the spring may be broken. And the function is lost; or because the orifice is blocked by dirt, the oil outputted by the pump flows directly back to the tank through the overflow valve, resulting in insufficient or no pressure. The solution is to disassemble the overflow valve and clean it; check or replace the spring to restore its performance.
Second, see if the relief valve works normally. If it is not normal, it may be that a valve in the pressure oil circuit is dirty or other reasons are stuck, and it is in the oil return position, so that the pressure oil circuit communicates with the overflow circuit. It is also possible that the pipe joint is loose, or some of the valves in the pressure oil line are leaking seriously, or the seals of the hydraulic cylinder and the hydraulic motor are damaged, causing serious leakage. The method of elimination is to disassemble the relevant valve for cleaning, check the size of the sealing gap and various sealing devices. If the seal is damaged, it should be replaced.
Third, look at the output flow of the hydraulic pump. If the flow rate decreases significantly with increasing pressure and the pressure does not reach the specified value, it is due to the increase in clearance after the hydraulic pump wears. Remedy: Determine the volumetric efficiency of the hydraulic pump to determine whether the pump can continue to be used. For parts with severe wear, repair or replace.
Fourth, see if the entire hydraulic system can establish normal pressure. Some pipes or hydraulic cylinders (hydraulic motors) have no pressure, or they may be blocked by components such as pipes, throttles, and directional valves. The pressure and the presence or absence of oil should be checked piece by piece to find out the cause and eliminate it.
Disposable Suction Irrigation Tube
Disposable Suction Irrigation Tube,Surgical System Spine,Disposable Plasma Blade,Suction Irrigation Tube
ZHEJIANG SHENDASIAO MEDICAL INSTRUMENT CO.,LTD. , https://www.shendasiaomed.com