Types Of Compressed Air

1. The original imported airend is used to ensure high effciency and stability, and smoother cutting.

2. Multiple protection devices, multiple shock and noise reduction configurations, low noise.

3. High-effciency refrigerant dryer and 5-level high-effciency special precision filter, high filtration accuracy, pressure dew point as low as 2~5°C, gas oil content as low as 0.001PPM, particulate matter filtration accuracy up to 0.01um, ensuring pure compression air.

4. Constant temperature control. The start and stop of the cooling fan can be set according to the season for the

better control on oil temperature to avoid emulsification.

5. The 500L large air storage tank has buffered air and stable air supply.

6. Centralized drainage aer post-treatment is helpful to keep the customer's site clean.

Oil-injected screw compressor shaft seal

There are two different shaft seals in oil-injected screw compressors: ①The shaft seal of the rotor shaft section adjacent to the compression chamber, especially at the exhaust end, which is more important; ②Extends out of the compressor end cover The shaft section must also have a shaft seal to isolate it from the atmosphere. Due to the different compression medium and allowable working conditions, the shaft seals of oil-injected screw air compressors are quite different from those of screw refrigeration and process compressors.

Most oil-injected screw air compressors use rolling shaft seals. In order to prevent the gas in the compression chamber from leaking out through the rotor shaft, a shaft seal must be installed between the rotor working section and the bearing at the exhaust end. This kind of shaft seal can be made very simple, as long as a specific oil groove is opened in the body corresponding to the shaft journal, and a certain pressure of sealing oil is passed in, an effective axial seal can be achieved. The axial length of the shaft seal should be as short as possible, so that the bearing is as close as possible to the working ton of the rotor, and the rigidity of the rotor is improved. When the screw compressor is working normally, there is almost no pressure difference between the rotor working section at the suction end and the bearing. When the air volume of the compressor is adjusted by means of suction throttling, there is only a possibility of burping atmospheric pressure here. Differential pressure. Therefore, between the rotor working section of the suction end and the bearing, only the gap seal can meet the requirements, and there is no need to provide sealing oil. types of compressed air

The outreach shaft of the rotor of oil-injected screw air compressor is usually designed on the suction side. As long as the air volume of the compressor is adjusted by means of suction throttling, there may be an atmosphere on both sides of the shaft seal on the outreach shaft. The pressure difference. However, since the shaft seal here must prevent the leakage of lubricating oil and the leakage of unfiltered air, in small air compressors, simple lip seals are usually used. In large and medium-sized air compressors, oil-lubricated mechanical seals are often used. types of compressed air

Compared with oil-injected screw air compressors, the sealing between oil-injected screw refrigeration and process compressors and belts is much more complicated. The main reasons are: ①The compressor to be sealed is not air, but may be toxic or flammable gas, and is usually very expensive: ②It may not be allowed to be polluted or diluted by air leaking from the outside; ③Shaft seal The pressure in the compressor on one side may be a vacuum of varying degrees, or it may be a high pressure of up to 1 MPa, and the pressure that needs to be sealed during shutdown may be higher. and so. At the rotor extension shaft of oil-injected screw refrigeration and process compressors, the responsible surface contact mechanical seals are usually used, mainly spring type and bellows type, and the shaft seal needs to be supplied with higher compression Lubricating oil under pressure inside the machine to ensure that a stable oil film is formed on the sealing surface. It is worth noting that the materials of related parts in the shaft seal must be able to withstand the corrosion of compressed gas.

types of compressed air

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