Permanent magnet variable frequency shield pump

Abstract

The invention discloses a permanent magnet variable frequency shield pump. The permanent magnet variable frequency shield pump comprises a pump body, an impeller, a magnetoelectric driver, an isolation assembly and a frequency converter; the magnetoelectric driver comprises a casing, a stator assembly and a rotor assembly (a central shaft, a rotor, a magnetic shielding layer and a permanent magnet); the isolation assembly is provided with a rotor sheath sleeving the outside of the permanent magnet, an isolation sheath sleeving the outside of the rotor sheath, and a front separator plate and asealing rear plate which correspondingly block two ends of the isolation sheath, the isolation sheath is fixedly connected with the front separator plate and abuts against the sealing rear plate, thefront separator plate is detachably connected with the casing, a second end of the isolation sheath is sleeved with an isolation sleeve sizing block, and an annular sealing gasket is arranged betweenthe sealing rear plate and the inner wall of the isolation sheath; and a liquid passing gap is arranged between the rotor sheath and the isolation sheath, a liquid passing channel is arranged on the central shaft, and a pump cavity, the liquid passing channel and the liquid passing gap communicate with one another. The permanent magnet variable frequency shield pump can adjust the output torque and the output frequency, and is energy-saving, efficient and environment-friendly; and the permanent magnet variable frequency shield pump is of a detachable structure and is easy to disassemble and maintain; and full sealing is achieved, and leakage is avoided.

Description

technical field [0001] The invention relates to the technical field of canned pumps, in particular to a permanent magnet variable frequency canned pump. Background technique [0002] Existing canned pumps usually add an isolation sleeve between the stator and the rotor. In order to make the isolation sleeve completely wrap the isolation stator and prevent the windings on the stator from being leaked by liquid, the isolation sleeve is usually welded on the pump casing or the motor end cover. On, to cooperate with the pump casing or electronic end cover to form the entire isolation ring. But it is also caused by this, the welding part must be disassembled for later inspection and maintenance, and it is necessary to return to the factory or go to the store to use special tools for maintenance. In the process, either the power is low and the efficiency is low, or the high-power pump is used in a low-power workplace, which consumes too much electricity, and cannot match the appr...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a permanent magnet variable frequency shielded pump to solve the problem that the power of the shielded pump in the prior art is low and cannot be properly matched and adjusted according to the use situation, and the isolation sleeve cannot be disassembled, so that the entire driving part cannot be replaced on site. The maintenance must be returned to the factory, the maintenance process is cumbersome and time-consuming, and the problem of low practicability

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