Method for improving use performance of flow guide body of centrifugal compressor

Abstract

The invention discloses a method for improving the use performance of a flow guide body of a centrifugal compressor. The method comprises the following steps that a nano ceramic material is sprayed onto the surface of the flow guide body of the centrifugal compressor in a plasma thermal spraying mode, a super polymer nano ceramic protective coating which has strong toughness, corrosion resistance and thermal shock resistance and has the thickness of 2-5 [mu]m is formed on the surface of the flow guide body of the centrifugal compressor, and the gap between the flow guide body and an impeller is kept constant for a long time in the use process of the centrifugal compressor. The thickness of the coating is smaller, the coating is closer to a machined original curve, it can be guaranteed that the fit clearance between the flow guide body and the impeller is more accurate, thus the leakage amount is reduced, the energy consumption of the centrifugal compressor is reduced, and the overall efficiency is improved.

Description

technical field [0001] The invention relates to a centrifugal compressor, in particular to a guide body matched with an impeller in the centrifugal compressor, which belongs to F04D 29 / 00 in the international patent classification table. Background technique [0002] Centrifugal compressor is a kind of vane rotary compressor, also known as turbo compressor, which is mainly used to compress gas. Its structure is mainly composed of rotor and stator. The rotor includes the impeller and the rotating shaft. The impeller has blades, balance discs and a part of the shaft seal; the main body of the stator is the cylinder, and there are diffusers, bends, reflux devices, and intake pipes. , Exhaust pipes and other devices. [0003] The working principle of the centrifugal compressor is: when the impeller rotates at high speed, it drives the gas to rotate with it. Under the action of centrifugal force, the gas is thrown into the diffuser behind, thereby forming a vacuum zone at the im...

AI Technical Summary

Problems solved by technology

In many applications, what enters the impeller is humid saturated air, or some sulfide corrosive gases, which can easily corrode and oxidize the guide body, causing the gap between the impeller and the guide body to increase, affecting the interstage compression of centrifugal compressors Ratio, resulting in a 2% to 5% decrease in overall machine efficiency

This level of proportion seems inconspicuous, but for large chemical plants, especially some continuous assembly lines, the negative "amplification effect" caused by it is very significant