Parallel dual-driving connected permanent magnet motor twin-screw pump system

Abstract

The invention relates to a twin-screw pump system of a parallel counter-drive conjoined permanent magnet motor, comprising a conjoined permanent magnet motor, the stator of the conjoined permanent magnet motor is composed of a stator core, a stator slot and a symmetrical winding, and two stators The cavity of the iron core forms a left-right symmetrical approximate "∞" structure with the vertical symmetry line. The symmetrical stator slot is symmetrical, and the stator slot is equipped with symmetrical windings; the rotor of the one-piece permanent magnet motor is concentric with the cavity inside the stator core of the one-piece permanent magnet motor, and the rotor of the one-piece permanent magnet motor contains permanent magnets. The permanent magnet is a built-in structure of rectangular blocks arranged in a ring; the integrated permanent magnet motor rotor is expanded and sleeved on the two shafts of the twin-screw pump, and the casing and the end cover of the twin-screw pump form an integrated packaged external structure. The synchronization of the two shafts is guaranteed, the speed can be effectively increased, the dynamic seal can be eliminated, and the transportation of nuclear fuel and other chemical fuels can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of motor assembly, and in particular relates to a twin-screw pump system of a parallel counter-drive conjoined permanent magnet motor. Background technique [0002] Twin-screw pumps are widely used in oil fields, shipbuilding and petrochemical industries, and have remarkable performance characteristics such as large displacement, strong self-priming ability and low noise. A twin-screw pump usually has two shafts, which are divided into a driving shaft and a driven shaft. The three-phase asynchronous motor drives the driving shaft to rotate, and the driving shaft drives the driven shaft to rotate through gears. There is no contact between the two screws, and the mutual tooth sides The gap between them remains constant, and the gap between the inner circle of the bushing and the outer circle of the screw also remains constant. The transmission between the two screws is actually through the mutual meshing of th...

AI Technical Summary

Problems solved by technology

The maintenance cost of the gear is relatively high, the vibration and noise are large, the lubricating oil has leakage pollution, and is easy to corrode, etc.

Transportation of nuclear fuel requires a high-speed, high-pressure operating environment, and strict requirements on sealing and leakage. The effect achieved by the synchronous gear is not ideal. The drive shaft protrudes out of the casing, and the nuclear fuel will also leak during the movement with the screw.

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