Zhengzhou centrifugal air compressor sealing package | Henan Haijie

The harm of surge phenomenon in centrifugal compressors The surge phenomenon of centrifugal compressors is extremely harmful to the compressor, which is mainly manifested in the following aspects: ① During surge, due to the strong pulsation and periodic oscillation of the air flow, the air supply will Parameters (pressure, flow, etc.) fluctuate greatly, destroying the stability of the process system. ② The blades will vibrate strongly, the impeller stress will be greatly increased, and the noise will be intensified. But the quality varies. Currently, the imported air compressor accessories on the market mainly fall into two categories: imported and domestic. Imported parts include genuine parts from complete machine manufacturers, high-quality parts from professional supporting factories, accessories for machine models produced in countries other than complete machine manufacturers (such as Japan, South Korea, Singapore, etc.), as well as air compressor parts from Hong Kong and Taiwan. For the same air compressor parts, there is a big difference between genuine parts, professional factory parts, domestic parts and imitations. Genuine parts have the highest price, followed by professional parts, and domestic parts and imitations have the lowest price. Generally, the price of genuine parts can be one or two times higher than that of imitation parts. In some cases, parts from foreign professional supporting manufacturers are even slightly lower than genuine parts from complete machine manufacturers. The good anti-wear performance prevents the surface of the compressor parts from being worn. Then use compressed air to blow off the dust on both sides or rinse with water, and finally dry the water stains on the surface. Put it back in place. The centrifugal compressor is connected to the pipeline network to form a closed gas medium transportation system. The compressor and the pipeline network work in this system at the same time, providing the necessary conditions for the transportation and pressure increase of the gas medium. If the flow rate of the compressor is constant during the transportation of the gas medium, Reduce When the compressor inlet flow rate is reduced to a certain value, the gas first generates a separated vortex flow in the impeller flow channel, further reducing the gas separation vortex area in the impeller flow channel and further expanding and forming a serious rotational detachment phenomenon. The gas flow state is seriously deteriorated and the compressor is discharged. When the pressure drops significantly, the pipe network gas will flow back to the compressor until the compressor outlet pressure is greater than the pipe network compressor and begins to discharge gas again. This periodic oscillation phenomenon produced by the air flow in the system is commonly known as compressor surge. Methods to Prevent Surge in Centrifugal Compressors Introduction to methods to prevent surge in centrifugal air compressors According to the summary of major centrifugal air compressor after-sales maintenance companies, two types of anti-surge methods are commonly used in China, namely fixed Limit flow (or minimum flow) method and variable limit flow method, the anti-surge device in process operations is the anti-surge valve.