On the morning of the 10th, Yang Qingfang, who lives in Bailong Road, Kunming, and as usual, unscrewed the faucet and began to take water to wash his face. It was just different from the past. She poured the waste water after washing into the bucket at the foot—this was her home. One of the Five Water Conservation Conventions.
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Variable Frequency Vacuum Pump
Vacuum pump refers to the use of mechanical, physical, chemical or physical chemical methods to be pumped out of the container to obtain vacuum devices or equipment.
Generally speaking, vacuum pump is a device that improves, generates and maintains vacuum in a closed space by various methods. In the pump chamber formed by rotating volume changes and the gas out of the pump, mainly in the process of inhalation, the volume of the suction chamber increases, the vacuum degree is reduced, the gas in the container is inhaled into the pump chamber, in the exhaust process, the volume becomes smaller, the pressure increases, and finally through the oil seal will be inhaled out of the pump.
(1) There is a large pumping speed in a wide pressure range;
(2) The rotor has good geometric symmetry, so the vibration is small and the operation is stable. There are gaps between the rotor and the rotor and the shell, no lubrication, small friction loss, can greatly reduce the driving power, so as to achieve a higher speed;
(3) pump chamber without oil seal and lubrication, can reduce oil vapor pollution to the vacuum system;
(4) No compression in the pump cavity, no exhaust valve. The structure is simple, compact, not sensitive to dust and water vapor in the gas being pumped;
(5) Low compression, poor effect on hydrogen gas extraction;
(6) The surface of rotor is curved cylinder with complex shape, so it is difficult to process and check.
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