Submerged pump with magnetic bearing

Abstract

The invention relates to a submerged bump with a magnetic bearing. The submerged bump comprises a motor, a pump cover and a pump body, wherein the motor is connected with the pump cover by a housing; the pump cover is connected with the pump body; a motor shaft is connected with a pump shaft; an impeller is arranged at the tail end of the pump shaft; the motor shaft is connected with the pump shaft by a shaft coupling; magnetic bearings are respectively arranged on two ends of the pump shaft; the magnetic bearing at the upper end of the pump shaft is arranged in a bearing block connected with the housing; and the magnetic bearing at the lower end of the pump shaft is arranged in the bearing block connected with the pump cover. A mechanical seal is arranged between the pump shaft above the impeller and the pump cover; a liquid outlet of the pump body is connected with a liquid outlet pipe; and the upper end of the liquid outlet pipe is connected and fixed to the housing by a support. Compared with the prior art, the submerged pump with the magnetic bearing is suitable for being used for conveying special corrosive mediums; once the submerged pump goes wrong in sealing, a corrosive medium enters a submerged sealing chamber of the pump, so that the magnetic bearing can be prevented from being corroded to lose efficacy, and work normally. The submerged pump with the magnetic bearing is relatively high in corrosion resistance, high in reliability, and long in service life.

Description

technical field [0001] The invention relates to the technical field of pumps, in particular to a submerged pump with a magnetic bearing for pumping corrosive media. Background technique [0002] Existing ordinary submersible pumps generally do not have the performance of corrosion resistance and high temperature resistance, so they cannot be used to pump corrosive media such as chemical raw materials, and special submerged pumps are required to transport corrosive media. At present, the bearings of existing submerged pumps mainly use water bearings, ordinary roller bearings or ball bearings. The disadvantage of using water bearings in submerged pumps is that they are easy to wear and need to be replaced frequently. At the same time, the radial runout of the bearings is large, which affects the pump. reliable operation of the group. The submerged pump using ordinary roller bearings or ball bearings usually corrodes the bearing under the condition of seal failure, which affec...

AI Technical Summary

Problems solved by technology

[0002] Existing ordinary submersible pumps generally do not have the performance of corrosion resistance and high temperature resistance, so they cannot be used to pump corrosive media such as chemical raw materials, and special submerged pumps are required to transport corrosive media

At present, the bearings of existing submerged pumps mainly use water bearings, ordinary roller bearings or ball bearings. The disadvantage of using water bearings in submerged pumps is that they are easy to wear and need to be replaced frequently. At the same time, the radial runout of the bearings is large, which affects the pump. reliable operation of the group

A submerged pump using ordinary roller bearings or ball bearings usually corrodes the bearing under the condition of seal failure, thus affecting the normal operation of the submerged pump

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