Centrifugal compressor

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The increase in pressure in a centrifugal compressor is achieved through the rotation of the impeller and the expansion performed by the diffuser. The working principle of a centrifugal compressor is as follows: when the impeller rotates at high speed, the gas rotates along with it; under the effect of centrifugal force, the gas is thrown into the diffuser behind it, creating a vacuum zone at the impeller location. At this point, fresh gas from the outside enters the impeller. The impeller keeps rotating, continuously drawing in and expelling gas, thereby maintaining a continuous flow of gas. Compared to reciprocating compressors, centrifugal compressors have the following advantages: compact structure, small size, and light weight; continuous and uniform exhaust flow, eliminating the need for devices such as intercoolers; low vibration levels, fewer wear-prone parts, and no need for large and bulky foundation structures ； Apart from the bearings, no lubrication is required inside the machine. This results in fuel savings and prevents contamination of the compressed gas. It features high rotational speed, minimal maintenance requirements, and easy adjustment.