Reasons for reverse rotation of electric fans 1. The electric fan has two windings: the main winding and the auxiliary winding. The main winding is used for running and the auxiliary winding is used for starting. When these two wires are connected reversely, the fan will turn upside down. 2. The capacitor changes the size of the magnetic field, so the difference between the main winding and the auxiliary winding is 180 degrees. Assume that the main winding is 180 degrees ahead of the auxiliary winding and the fan is rotating forward. If the primary winding lags 180 degrees behind the auxiliary winding, the fan begins to rotate in reverse. 3. In addition to the reverse connection of the electric fan, the reverse connection of the electric fan may also be caused by incorrect installation of the blades or damage to the motor. Therefore, the reversal of the electric fan is not only caused by one reason, but also by many reasons. How to make the electric fan rotate forward when reversing? 1. The electric fan rotates reversely because the wires are not connected properly. When power is connected to the common and run terminals, the fan rotates forward, and when power is connected to the common and start terminals, the fan rotates reverse. If it is a three-phase fan, it can be restored to normal by changing the phase sequence of the power supply. 2. The reverse rotation of the electric fan may be due to damage to the motor. In this case, the motor needs to be replaced, and it is best to have it replaced by a professional. If someone who does not know how to replace a motor rushes to replace the motor, the electric fan may be damaged. 3. Reverse rotation of the electric fan may be caused by incorrect installation of the blades. At this time, you can check the instruction manual and reinstall the electric fan blades correctly according to the correct installation method, and the electric fan can rotate normally.
A wind turbine blade pierced a van, killing one and injuring one. What was the cause of the accident?
If the gasoline generator is not used for a long time, the gasoline will not expand, but it will damage the fuel tank!
If you will not use your gasoline generator for six months or more, please make the following preparations before storing it.
1. The generator can be kept in a well-ventilated place with low humidity.
2. Disconnect the fuel pipe first, and then carefully drain the remaining oil in the fuel tank and filter (cup). Leaving gasoline in the fuel tank for a long time will damage the tank and cause difficulty in starting again.
3. You can loosen the oil drain screw on the carburetor float chamber to drain the fuel in the carburetor, or start and run a small gasoline generator without any load until it generates electricity. Stop until the engine fuel is exhausted.
4. Disconnect the battery terminals. Then check the fluid level of the storage battery and add distilled water if necessary.
5. Change the engine oil. Used engine oil will produce a lot of residue, and if it is parked for a long time, it will produce a lot of sediment. If it is used again, it will wear out small generator parts.
6. Check whether the screws and bolts are loose. Tighten if necessary.
7. Use an oily cloth to clean the gasoline generator carefully. Apply antiseptic if necessary. Do not use water to clean the generator.
With the development of the times, science and technology have gradually progressed, and more and more technologies have appeared in people’s lives. These technologies have enriched people’s lives and also brought them many benefits. Very helpfulIt can be said that the invention of vehicles has helped us even more, making our transportation more convenient. When we go out, we don’t have to worry about catching a car. It can be said that the emergence of cars has brought great convenience to people. At the same time, At the same time, it also brings harm to us. Sometimes traffic accidents will occur if we are not careful, and traffic accidents bring us great harm. How many families have been broken up because of traffic accidents. When we go out, we must Pay more attention to safety and drive safely when you go out. Safe travel is the most important thing.
The most heard thing during this period is probably traffic accidents. Every time a traffic accident occurs, there will be certain damage, both to vehicles and people. However, there are also very serious injuries. Fortunately there were no casualties. I recently saw a related report that a car was involved in an accident because a wind turbine blade pierced the car, resulting in one death and one injury. The incident also attracted a lot of attention. Many netizens said , the car must be inspected regularly. This accident was too terrible. Others said that it was too terrible and hoped that the other one would be safe.
It is understood that this incident occurred in Shaoyang Chengbu Miao Autonomous County, Hunan. It can be seen from the surveillance video that a car was hit by the wind turbine blades of an oncoming truck when passing a traffic light. It pierced the car. It can be clearly seen from the video that the blades directly pierced the windshield, and the windshield bounced up and down. There were two passengers in the car, one of whom died on the spot. Then the police and medical personnel rushed to the scene. When we arrived at the scene, we found that the other passenger's life was no longer in danger after treatment. The police are still handling the specific matter.
At the same time, we also appeal to everyone to pay attention to safety when going out. Not only must you drive safely, but you must also stay away from large trucks. Protecting your own safety is the most important thing.