The pros and cons of static electricity
We know that friction can be electrified, and the positive and negative charges after friction are bound to the charged body. It cannot move in the same direction as the electric charge in the wire. Therefore, people call it static charge, referred to as static electricity.
Static electricity has many hazards, and its first hazard comes from the interaction of charged bodies. When the aircraft body is rubbed against air, moisture, dust and other particles, the aircraft will be charged. If no measures are taken, it will seriously interfere with the normal operation of the aircraft radio equipment, making the aircraft into scorpions and scorpions; in the printing house, paper sheets The static electricity between them will make the paper sheets stick together and difficult to separate, which will cause trouble to printing. In the pharmaceutical factory, due to the electrostatic attraction of dust, the medicine will not reach the standard purity; when the TV screen is placed on the screen Static electricity easily absorbs dust and oil, forming a thin film of dust, which reduces the clarity and brightness of the image. Even dust that is common and difficult to shoot on blended clothes is also a ghost of static electricity. The second major hazard of static electricity is the possibility of explosions caused by static sparks igniting certain flammable objects. In the dark night, when we take off nylon and wool clothes, we will make a spark and a "beep" sound, which is basically harmless to the human body. However, on the operating table, static sparks can cause an explosion of anesthetic agents, which can harm doctors and patients. In coal mines, gas explosions can occur, causing death and injury to workers and mines being scrapped. Who can assert that the sudden explosion of the Norwegian tanker "Istria" on December 29, 1997 was not a static disaster? Who can be sure that the explosion of the Harbin linen factory in the country that was shocked in 1990 was not caused by static sparks?
In short, the electrostatic hazard is caused by electrostatic forces and static sparks, and the most severe electrostatic discharge in electrostatic hazards causes fire and explosion of combustibles. It is often said that the measures to prevent the occurrence of static electricity and prevent the generation of static electricity are generally to reduce the flow rate and flow rate, to reform the process of generating electricity, and to use equipment materials with less electricity. The easiest and most reliable way is to ground the device with wires so that it can be charged into the ground to avoid static buildup. Careful passengers will probably find a discharge brush on both sides of the wing and the tail of the aircraft. When the aircraft is landing, in order to prevent passengers from being shocked when they disembark, most of the aircraft landing gears use special ground tires or grounding wires. To release the static charge generated by the aircraft in the air. We also often see a chain at the end of the tanker, which is the ground wire of the car. Appropriately increase the humidity of the working environment, let the charge release at any time, can also effectively eliminate static electricity. It is not easy to do an electrostatic test in wet weather. This is the reason. Antistatic agents researched by researchers can eliminate static electricity inside the insulator.
However, everything has two sides. For static electricity, as long as it touches its temper, it can also make it serve humans. For example, electrostatic printing, electrostatic spraying, electrostatic flocking, electrostatic precipitator and electrostatic sorting technology have been widely used in industrial production and life. Static electricity has also begun to play a role in desalinated seawater, assembly lines, pipe bending machines, LED mining lamp housings, woolen factories, Tianjin discount tickets, C spray pesticides, artificial rainfall, low temperature freezing, etc., even installed on the spacecraft. Electrostatic device such as a device.