Engine oil pressure too low because – Diesel – Machinery Industry – china Sand Pump ES

Diesel engine The normal engine oil pressure should work between 0.25-0.35MPa, including new machines or machines with low temperature may be higher, the old machine or the machine at high temperature is lower. Machines in operation, if the oil pressure is less than 0.2MPa or changes with the speed fluctuated, and even suddenly dropped to zero, indicating a problem with the machine, immediately turn off to find reasons for troubleshooting before they can re-start. Otherwise, it will lead to a large tank fire incidents Wallachia. Now we have encountered several examples are described below:

1. Machine pump out the oil pressure drop caused by fuel shortage Oil pump have

Gear Two kinds of pumps and pump rotor. Some gear pumps (such as 4125-type diesel engine oil pump), the pump cover and pump body joint surface roughness is low, the original design without pads, use additional paper if the repair time pad, it increases the gear the face clearance, it will reduce the pump out of fuel. However, the pump and cylinder block joint surface Department has a gasket, if the missing equipment, from machine pump Press Oil leak on this field, resulting in engine oil pressure drops. Some rotor pump, its external rotor side are chamfered, chamfer the other side not, if installed against, out of fuel can be reduced by 40% to 60%. In addition, the gear or rotor of the radial and face clearance when the result of excessive wear will result in a fuel pump and oil pressure drops to reduce the adverse consequences. Restored oil pump should be adjusted on the test stand pressure limiting valve opening pressure, to keep it at between 0.5-0.7MPa. If the pressure is too high, will accelerate the oil pump wear; if pressure is too low, will lead to the main oil path pressure drop. Install the oil pump should be filled first, so that air and suction pump with no oil. Oil pump and oil-absorbing plate junction must be sealed, if the leakage will reduce the pump out of fuel. (Magneto transistor)

2. Oil filter blockage caused by the oil pressure drops

When the oil filter plugging, oil can not be passed when the filter is located in the base of the valve will be the top open so that oil is not filtered directly into the main oil duct. However, if the safety valve opening pressure is too high and can not be opened in time, will cause the oil pump internal leakage increases and reduce the main oil path of the fuel supply, engine oil pressure has fallen. When the oil filter should be maintained, the right to adjust valve opening pressure to the 0.35-0.45MPa. In addition, if the safety valve Spring Aging, the valve seat and ball loose closed, oil will bring a lot of leakage, resulting in sump oil bubble, this time scale can be seen covered with oil out of the oil bubble. 3. Back to valve damage caused by oil pressure drop In order to maintain the main oil duct

normal engine oil pressure, oil return valve with here. If the return valve springs to soften or improperly adjusted, valve seat and ball with surface wear or loose dirt stuck closed, the return on the substantial increase in oil, the main oil duct oil pressure drop. Should return valve repair, will open the pressure adjusted to between 0.28-0.32MPa. In addition, if the low pressure oil return valve to open, the machine work will lead to frequent opening and closing the oil return valve, causing the oil gauge pointer swings back and forth, the main oil path are also vulnerable to oil supply shortage of bush-burning incident occurred. 4. Oil radiator oil spills caused by oil pressure drops.

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