How does the lubrication quality of the diesel generator set occur?

How does the lubrication quality of the diesel generator set occur?

The oil pressure of the diesel generator set indicates the technical condition of the lubrication system. If the oil pressure is too low or too high, it will affect the lubrication quality of the diesel engine. In the event of abnormal oil pressure, the cause should be immediately identified and eliminated.

The oil pressure is always low No matter what speed or temperature the engine is in, the oil pressure gauge indicates that the oil pressure is always lower than 69kPa, and the oil pressure warning light is shining. The main reasons are:

1. The oil amount and oil quality of the generator set do not meet the requirements. Such as oil in the sump is too small; engine oil thinning, deterioration, viscosity drop; oil mixed with water, diesel and so on.

2. The oil pump is seriously worn or improperly assembled. The pump oil pressure cannot meet the requirements. The oil leaks too much in the pump.

3. The oil collecting screen or the filter is seriously blocked by the sludge, and it is difficult for the oil to enter the main oil passage.

4. The oil pump inlet pipe joint is not tightly sealed and there is a serious inhalation phenomenon.

5. There is a serious leakage phenomenon in the lubricating oil road, which causes the oil in the main oil passage to flow back from the leak to the oil sump and relieve pressure. The main leaks are: the loosening of process oil on the engine block; the rupture of the oil pipe; the loosening of the screw plug of the crankshaft-centrifugal oil chamber; the excessive clearance of the crankshaft bearing or cam uranium bearing.

6. The oil pressure gauge and the induction plug are not working (remove the induction plug wire and directly ground the iron. If the pressure returns to normal, the induction plug is damaged).

The CPU in the monitoring system of the Cummins generator set is a central part of the diesel generating set monitoring system. It mainly coordinates the organization and operation of the monitoring system. The current domestic and foreign monitoring systems are generally high-performance microprocessors. The monitoring requirements of the diesel generator set can be achieved by partially modifying the monitoring parameters through human-machine dialogue. Single-chip microcomputer as a high-performance, low-voltage equipment, can be used as the monitoring system in the CPU, the microcontroller can be repeatedly erased, because of its high density and strong storage technology can better achieve monitoring, the microcontroller is also equipped with a timer, Can be automatically captured and reloaded so that monitoring design can be better implemented.

The generator itself has a sensor. The sensor can convert the analog signal into a power signal. Because of the signal amplitude of the sensor and the interference of the generator itself, the signal conditioning is performed before the signal is converted. The signal conditioning is mainly to carry on the signal simulation processing, uses the electronic circuit to carry on, its purpose is to carry on the output through the electrical quantity signal of the sensor, thus carries on the transformation after the processing. Signal conditioning can compensate the nonlinearity of the sensor, thereby improving the signal to noise ratio of the signal and improving the quality of the signal. The design of the monitoring system of the diesel generator set should use the circuit of the input channel to convert the current output by the sensor into an AC signal and eventually convert it into a unipolar DC signal and implement the input of the analog-to-digital converter through the filter circuit.

After the information is collected and analyzed by the monitoring system of the generator set, it can be judged whether all the working links are normal, because the diesel generator set monitoring system can issue an alarm when the operation fails, and the display is changed by turning the button to red. .

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