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ChineseAccording to the analysis, the noise pollution caused by the automobile air pump is mainly caused by three factors, which are the sound source, the transmission medium and the receiver. Only when these three exist at the same time can interference be formed. That is to say, as long as we start from these three aspects, we can achieve the purpose of controlling the noise of the automobile air pump by reducing the sound source, limiting the transmission of noise, and blocking the reception of noise.
If there are countless small interconnected holes inside the material, then when the sound wave is incident on the surface of these materials and then into these small pores, it will cause the air movement in the pores, and the air close to the hole wall and the surface of the fiber, It is not easy to move due to friction and viscous motion resistance, so that the sound energy is converted into heat energy and consumed. Therefore, to choose a sound-absorbing material with good performance for the automobile air pump, the material must be porous, the holes are connected to each other, and the through holes must be connected to the outside world. The other is sound insulation, which is to seal the noise source of the vortex air pump so that the noise is controlled in a small space. When the sound wave encounters the shield, due to the change of the interface characteristic impedance, a part of the incident sound energy is reflected, a part is absorbed, and a part of the sound energy penetrates into the shield and continues to propagate.
Use and maintenance of car air pump: The car air pump should be placed in a relatively stable place, and the surrounding environment should be clean, dry and ventilated. The rotation direction of the impeller of the automobile air pump must be consistent with the direction of the arrow marked on the fan casing. When the car air pump is working, the working pressure should not be greater than 8kpa, so as to avoid the air pump being damaged due to excessive heat generated by the air pump and overcurrent of the motor. It is strictly forbidden for solids, liquids and corrosive gases to enter the pump body of the automobile air pump. The filter screen and muffler device at the inlet and outlet ends of the car air pump should be cleaned in time according to the situation, so as not to block and affect the use.
The external connection of the air inlet and outlet of the automobile air pump must be connected by a hose. Replacement of car air pump bearings: Replacement of bearings must be performed by someone who is familiar with repair work. Loosen the screws on the pump cover first, then disassemble the parts one by one in sequence, the disassembled parts should be cleaned and then assembled in reverse order. When disassembling, do not pry the impeller hard, use a special puller to pull it out, and do not miss the adjusting gasket, so as not to affect the clearance that has been adjusted at the factory.
Except for the two bearings of the motor rotor, the other parts of the automobile air pump have no direct contact friction. The installation method of the air pump bearing is mainly divided into two categories. The bearing of the first type of air pump end is installed in the pump body between the motor base and the impeller, and this type of air pump does not need to be lubricated normally. The bearing of the second type of air pump end is installed in the middle of the pump cover, and the bearing of this type of air pump end should be lubricated regularly. Once a month, the frequency of refueling should be increased for three consecutive shifts of air pumps. The maintenance of the bearing at the fan end of this type of air pump motor is the same as that of the first type of air pump.
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