Novel wear-resistant and corrosion-resistant chemical centrifugal pump

Abstract

The invention discloses a novel wear-resistant and corrosion-resistant chemical centrifugal pump which is applied to transport corrosive liquid containing solid particles and other fiber media in papermaking, chemical engineering, food, environmental engineering and other industries. A pump shaft is fixedly arranged on a bearing box of a suspension; two ends of the bearing box are respectively provided with a front gland and an end cover fixedly; a mechanical seal is arranged between a pump cover and the pump shaft; an impeller is fixedly arranged on one end of the pump shaft; the pump body is fixedly arranged on the suspension; a front lining board is arranged between the pump body and the impeller; a rear lining board is arranged between the pump cover and the impeller; a hard alloy layer is respectively sprayed on each of the front lining board and the rear lining board which are made of corrosion-resistant and wear-resistant materials, so that the wear-resistant performance of the front lining board and the rear lining board are further improved; and meanwhile, the surfaces of the coatings are smoother, so that the friction force and resistance of a flow through object are reduced, serous fluid can pass quickly, the use power of a water pump is reduced, the use efficiency is improved and the energy-saving effect is significant.

Description

technical field [0001] The invention relates to a centrifugal pump, in particular to a chemical centrifugal pump used in industries such as papermaking, chemical industry, food and environmental protection engineering to transport corrosive liquid containing solid particles and other fibrous media. Background technique [0002] Wear-resistant and corrosion-resistant chemical centrifugal pumps can be widely used in paper mills, food processing and environmental protection industries to transport slurry containing abrasive solid particles, such as pulp in paper mills. In the chemical industry, some corrosive slurries containing crystals can also be transported. At present, the wear-resistant and corrosion-resistant chemical centrifugal pumps used in the market are made of American Standard 304 or duplex neutral steel. Although they have certain corrosion resistance, their wear resistance is poor. The body and impeller will be worn out. Once the wear exceeds a certain range, t...

AI Technical Summary

Problems solved by technology

At present, the wear-resistant and corrosion-resistant chemical centrifugal pumps used in the market are made of American Standard 304 or duplex neutral steel. Although they have certain corrosion resistance, their wear resistance is poor. The body and impeller will be worn out. Once the wear exceeds a certain range, the pump's delivery efficiency will drop significantly, and the noise of the pump will increase exponentially. Therefore, the pump body and impeller must be replaced. Wear-resistant and corrosion-resistant chemical centrifuges The pump must be both wear-resistant and corrosion-resistant. The material used for the pump with good wear resistance has poor corrosion resistance, and the material with good corrosion resistance is not wear-resistant. This has always been difficult to solve for wear-resistant and corrosion-resistant chemical centrifugal pumps. It is a big problem, so this type of centrifugal pump is a high-consumable product, and the problem of wear resistance has not been effectively improved and solved.

However, when transporting media containing solid particles, the front and rear linings are still easy to wear in the radial direction, and the front and rear linings will not be able to wear after wear.

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