Failure Analysis Of Diesel Generator Coolant Not Recycling

- Nov 07, 2018-

Failure Analysis of Diesel Generator Coolant Not Recycling

In the operation of the diesel generator set, sometimes the coolant does not circulate, resulting in a phenomenon that the cylinder temperature rises rapidly and the oil temperature rises and the sudden shutdown occurs, which affects the safe use of the diesel generator set. Shaanxi Xingguang Power believes that such failures must be of great concern to users. Below, Shaanxi Starlight Power will make a simple analysis of such failures.

The reasons why the coolant does not circulate are as follows:

(1) The heat sink of the diesel generator set radiator is blocked or damaged. The cooling fan does not work or the heat sink is clogged, so that the temperature of the coolant can not be lowered, and the heat sink is rusted, causing liquid leakage, which can also cause poor circulation.

(2) The temperature of the diesel generator set is faulty. The thermostat is installed in the combustion chamber of the engine to control the temperature of the engine combustion chamber. The thermostat must be fully opened at the specified temperature (82 degrees) to facilitate the small cycle. If there is no thermostat, the coolant cannot maintain the circulating temperature. A low temperature alarm will be generated.

(3) The air in the cooling system of the diesel generator set is mixed, causing the pipeline to be unobstructed. The damage of the suction valve and the exhaust valve on the expansion tank directly affects the circulation. At this time, it is necessary to check whether the pressure value of the expansion valve meets the requirements and inhale. The pressure is 10kpa, the exhaust pressure is 40kpa, and the exhaust pipe is unblocked, which is an important factor affecting the cycle.

(4) The coolant level of the diesel generator set is too low or does not meet the requirements. If the liquid level is too low, the temperature of the coolant will increase directly, so that the coolant will not circulate. The coolant is 50% antifreeze + 50% softened water + DCA4 according to the regulations. If it does not meet the requirements, the pipeline will be blocked and the pipe wall will be produced. Rust prevents the coolant from circulating properly.

(5) The diesel generator set water pump is faulty. Check if the pump is working well. If the pump drive pinion wear is too limited, it means that the pump has no effect and needs to be replaced before it can be cycled normally.

Only through correct fault analysis can the right medicine be taken, and reasonable countermeasures should be taken to remind users to learn theoretical knowledge and master the various fault response methods, so as to timely repair the equipment and ensure the normal operation of the enterprise.



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