Three principles are common for the operation of oil-free vacuum pumps, which are similar to the capacity pumps, claw pumps and cryogenic pumps. Following is a detailed presentation of the oil-free vacuum pumps。
1. The volume changes, which are carried out through volume changes, inhalation of the air at large, excretion of air at volume change hours (higher pressure), require small gaps and high precision, such as claw pumps。
Ii. Carrying air molecules, such as molecular pumps, by directed impact, relying on very high mechanical motion speeds. The third is the cryogenic pump, where almost all air molecules are frozen on the surface on a cold surface near absolute zero degrees。
The largest part of the oil-free vacuum pump is non-returned oil, no oil contamination of the pump space, no oil spray, no oil discharge from the pump vent, no pollution of the environment, and an environmentally friendly product, so there are good prospects for development, known as the twenty-first century “green vacuum pump”。
Non-oil-free vacuum pumps, also known as dry pumps, consist mainly of rotors, pistons, screws, vortex, turbines, claw pumps, etc。
In the day-to-day use and maintenance of oil-free vacuum pumps, the following matters require attention:
1. There shall be adequate ventilation and ambient temperatures below 40°c。
2. Cleaning sites free of dust and dirt。
3. Liquids such as no water or oil will land on the pump。
No direct exposure to sunlight。
5. Sufficient surrounding space for pump inspection, maintenance and assembly。
Pumps shall be installed on flat plane。
It would be preferable to place the pump on a solid foundation similar to concrete or, in the absence of conditions, to place the pump firmly on a steel or wooden rack。
8. It is important to ensure that pumps are not shaken by weak foundations。
9. Pump-connected pipes should not be too long or less than the pump's import path, affecting the speed of extraction, with the same attention being paid to checking whether the vacuum-connected pipes are leaking。
When wires are delivered, attention shall be paid to the required connection requirements on the placard. The three-phase pumps shall be careful that the engine rotation direction corresponds to that of the marked arrow on the pump。
