How to operate and use Weichai generators properly in severe cold winter to avoid unfavorable conditions?
1. Avoid Weichai generators releasing water too early or not releasing cooling water. Run at idle speed before turning off the flame, wait until the cooling water temperature drops below 60°C and the water is not hot, then turn off the flame and drain the water. If the cooling water is released prematurely, the body will suddenly shrink and cracks will appear when the body is suddenly attacked by cold air when the temperature is high. When the water is discharged, the remaining water in the body should be completely discharged to prevent it from freezing and expanding and causing the body to burst.
2. Weichai generators should not use fuel oil casually. The low temperature in winter makes the fluidity of diesel oil worse, the viscosity increases, and it is not easy to spray, resulting in poor atomization and deterioration of combustion, resulting in a decline in the power and economic performance of Cummins diesel generators. Therefore, light diesel oil with low freezing point and good ignition performance should be selected in winter. It is generally required that the freezing point of Weichai generators should be 7-10°C lower than the local minimum temperature in the current season.
3. Weichai generators should not be started with an open flame. The air filter cannot be removed, and the cotton yarn is dipped in diesel oil and ignited to make a kindling material and put it in the intake pipe to start the combustion. In this way, during the start-up process, the outside dusty air will be directly sucked into the cylinder without being filtered, causing abnormal wear of pistons, cylinders and other parts, and will also cause the Weichai generator to work rough and damage the machine.
4. Weichai generator should not use an open flame to bake the oil pan. So as not to deteriorate or even burn the oil in the oil pan, reduce or completely lose the lubricating performance, thereby aggravating the wear of the machine. In winter, oil with a low freezing point should be used, and the temperature of the oil can be increased by heating the water bath outside the machine when starting.
Five, avoid improper start method. In winter, some operators often use the abnormal start method of waterless start (start first, then add cooling water) in order to quickly start the Weichai generator. This practice can cause serious damage to the machine and should be prohibited.
Sixth, avoid low temperature load operation. After the diesel engine started to catch fire, some operators couldn't wait to put the load into operation immediately. For Weichai generators that have caught fire soon, due to the low temperature of the body and the high viscosity of the oil, the oil is not easy to be filled into the friction surface of the moving pair, which will cause serious wear and tear of the machine. In addition, plunger springs, valve springs and injector springs are also prone to breakage due to "cold brittleness". Therefore, after the Cummins diesel generator starts to catch fire in winter, it should idle for a few minutes at low and medium speed, and then put into load operation when the cooling water temperature reaches 60 °C.
Seven, avoid not paying attention to the body heat preservation. In winter, the temperature is low, and it is easy to over-cool the diesel engine when it is working. Therefore, heat preservation is the key to good use of Weichai generators in winter. In the northern region, Weichai generators used in winter should be equipped with cold protection equipment such as thermal insulation jackets and thermal insulation curtains.
1. Avoid Weichai generators releasing water too early or not releasing cooling water. Run at idle speed before turning off the flame, wait until the cooling water temperature drops below 60°C and the water is not hot, then turn off the flame and drain the water. If the cooling water is released prematurely, the body will suddenly shrink and cracks will appear when the body is suddenly attacked by cold air when the temperature is high. When the water is discharged, the remaining water in the body should be completely discharged to prevent it from freezing and expanding and causing the body to burst.
2. Weichai generators should not use fuel oil casually. The low temperature in winter makes the fluidity of diesel oil worse, the viscosity increases, and it is not easy to spray, resulting in poor atomization and deterioration of combustion, resulting in a decline in the power and economic performance of Cummins diesel generators. Therefore, light diesel oil with low freezing point and good ignition performance should be selected in winter. It is generally required that the freezing point of Weichai generators should be 7-10°C lower than the local minimum temperature in the current season.
3. Weichai generators should not be started with an open flame. The air filter cannot be removed, and the cotton yarn is dipped in diesel oil and ignited to make a kindling material and put it in the intake pipe to start the combustion. In this way, during the start-up process, the outside dusty air will be directly sucked into the cylinder without being filtered, causing abnormal wear of pistons, cylinders and other parts, and will also cause the Weichai generator to work rough and damage the machine.
4. Weichai generator should not use an open flame to bake the oil pan. So as not to deteriorate or even burn the oil in the oil pan, reduce or completely lose the lubricating performance, thereby aggravating the wear of the machine. In winter, oil with a low freezing point should be used, and the temperature of the oil can be increased by heating the water bath outside the machine when starting.
Five, avoid improper start method. In winter, some operators often use the abnormal start method of waterless start (start first, then add cooling water) in order to quickly start the Weichai generator. This practice can cause serious damage to the machine and should be prohibited.
Sixth, avoid low temperature load operation. After the diesel engine started to catch fire, some operators couldn't wait to put the load into operation immediately. For Weichai generators that have caught fire soon, due to the low temperature of the body and the high viscosity of the oil, the oil is not easy to be filled into the friction surface of the moving pair, which will cause serious wear and tear of the machine. In addition, plunger springs, valve springs and injector springs are also prone to breakage due to "cold brittleness". Therefore, after the Cummins diesel generator starts to catch fire in winter, it should idle for a few minutes at low and medium speed, and then put into load operation when the cooling water temperature reaches 60 °C.
Seven, avoid not paying attention to the body heat preservation. In winter, the temperature is low, and it is easy to over-cool the diesel engine when it is working. Therefore, heat preservation is the key to good use of Weichai generators in winter. In the northern region, Weichai generators used in winter should be equipped with cold protection equipment such as thermal insulation jackets and thermal insulation curtains.
In addition, the thermostat plays an important role in the temperature rise of the diesel generator when it is working. Therefore, it is necessary to check whether the thermostat works normally before winter, and the failed thermostat should be replaced in time.
