How to quickly and accurately find the fault location that caused the unit's low oil pressure
In actual operation, the low oil pressure of diesel generators is one of the common faults. When the oil pressure is low, it takes time and effort. First of all, I would like to introduce to you that there may be many reasons for the low oil pressure of the diesel generator set. For example, the main and connecting rod bearings or camshaft bearings are loose, the main oil pipes are damaged, loose connections, and the valve coupling pressure is not limited. Looking back, the pump is exhausted and the filter is dirty, etc.
In general, the method to determine the fault location is to find the fault location from the oil pump, and then find the fault location one by one. This method is time-consuming, time-consuming, manpower and material resources, and the location of the fault can be determined by using the smoke blowing method. The method is intuitive, simple and fast, avoids unnecessary disassembly, and greatly improves work efficiency.
The specific method is as follows: after the oil quality, oil pressure gauge and oil pressure sensor are normal, after removing the oil pan, remove any screw main cylinder body, and compress with a screw hole hose on rubber; then, after taking a breath of smoke, the smoke The part that will blow into the oil passage, and the smoke will be observed. This is the fault location, which makes the oil pressure lower. If there is no smoke from all parts, it can be considered an engine oil pump or filter.
In short, through the "smoke blowing method", it is not necessary to find the fault location quickly and accurately as part of the inspection, thereby solving the problem of low oil pressure of the diesel generator set, enabling the unit to resume normal work as soon as possible, and ensuring the stability of power supply enterprises.
- Blue smoke, fire reason: It means that the engine is burning oil. There are three types of reasons: first, the piston ring goes opposite, and the oil comes in the cylinder; the second is the oil level of the oil pan of the atmosphere filter, which leads the ring. The height of the groove; Third, the gap between the duct and the valve stem is too poor. Expulsion idea: adjust the piston ring so that the opening teeth of the ring are staggered 120 degrees or 180 degrees, the opening teeth of the ring should avoid the piston pin hole and the side pressure is poor Adjust the height of the oil level of the oil filter of the atmosphere filter below the height of the annular groove; if the clearance between the duct and the valve stem is too poor, replace the component and reduce the clearance. The normal mutual assistance clearance between the two is 0.0
- In the power generation industry in China, we have been working hard, pursuing the concept of quality and service, and for the sake of customers, the full power generator chooses China and your generator is a professional housekeeper. At present, the diesel generator set maintenance market refers to damage inspection and routine maintenance. Two aspects: after maintenance refers to the failure of the diesel generator, there are problems with various accessories, such as replacing the generator or
- Before starting, you should check whether the fuel volume of the fuel tank is rich, and there is no oil leakage in each oil pipe and the discussion area; whether the cooling system water is rich, clean and leak-free, and whether the fan belt is tight or not. The internal combustion engine and generator drive part should be connected and trusted The wires of the input line are well-insulated, complete and effective in all aspects. After starting, it should run at low speed for 3 to 5 minutes. After the temperature and oil pressure wheel are normal, the initial work can be done. The generator should be no different in the speed increase. Ring, the slip ring and commutator are well brushed, no jumping and sparking phenomenon. After the operation is stable and the frequency and voltage reach the rated value, power can be supplied to the outside.
- The diesel engine is working normally, but the generator fails to generate electricity or the voltage is very low. This may be due to the components associated with the generator, such as: the exciter is damaged and the excitation voltage cannot be supplied. The excitation current is taken in. The rotor's dead center residual magnetism is weakened or declining. It will make the generator unable to generate electricity or the transmission voltage is extremely low. The right to respond is usually: use an appropriate DC voltage and directly connect it to the excitation winding according to the polarity. Magnetization. Carefully inspect the exciter and the cyclotron rectifier, find abnormal components or windings, and replace them for restoration. The generator's transmission voltage is unstable, and
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