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Magnetic-suspension axial thrust brake for motor screw pump

A screw pump, electric motor technology, applied in the direction of machine/engine, rotary piston type/oscillating piston type pump parts, pump elements, etc.

Inactive Publication Date: 2010-05-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of non-contact operation of axial suspension, the present invention utilizes the axial magnetic force generated by magnetic repulsion or suction to solve the axial force generated when the rotor of the motor screw pump conveys the medium, and makes it in the reference position of suspension (balance Position) state, without affecting the rotation, and also does not affect the passage of the medium

Method used

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  • Magnetic-suspension axial thrust brake for motor screw pump
  • Magnetic-suspension axial thrust brake for motor screw pump
  • Magnetic-suspension axial thrust brake for motor screw pump

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Embodiment Construction

[0009] As shown in the attached figure, ① is the housing, and ② is the extension of the rotor head. In practice, permanent magnets are embedded in both ① and ②. When the magnets are embedded, the S pole of the permanent magnet in ① should be aligned with that in ②. The S poles of the permanent magnets are opposite, and the N poles are opposite to the N poles. And the magnetic induction intensity of the permanent magnets in the pump body located on both sides of ② must be equal, so as to achieve the balance of force and make the rotor levitate, so as to achieve the purpose of axially fixing the rotor .And in order to have enough magnetic force to fix the rotor, and to have an appropriate distance between the rotor and the housing in space, the general suspension air gap is 0.3-3mm (selected according to the specific situation), and the axially protruding distance is taken as 10cm-35cm, the radial extension distance is 5cm-15cm. For example, when the rotor diameter is 20cm, the a...

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Abstract

A magnetic-suspension axial thrust brake for a motor screw pump relates to the electromechanical field. In the invention, the head of any end of a rotor of the motor screw pump is led to extend out axially, the extended part protrudes along radial direction, and a permanent magnet is embedded into the radial protruded part. The polarities of the permanent magnet are the same respectively along the axial direction of the rotor, and a permanent magnet with the same magnetic induction intensity is embedded into the casing of the motor screw pump which is opposite to two ends of the protruded part. The polarities of the permanent magnet inside the motor screw pump are respectively identical or opposite to that of the opposite permanent magnet at two ends of the protruded part of the rotor. Then, the property of repellency between same polarities and attraction between opposite polarities of permanent magnets can be utilized to lead the rotor to be fixed along the axial direction and be retained in suspension state by the balance of force so as to prevent friction between the rotor and the motor screw pump, reduce energy cost and also avoid impact on the circuition of the rotor.

Description

technical field [0001] The invention relates to the electromechanical field, in particular to a magnetic suspension axial thrust device of a motor screw pump. Background technique [0002] Chinese invention patent motor ZL200610097399.5 proposes a motor screw pump, which includes: stator, rotor, stator winding, rubber lining, connector, voltage-frequency controller, which is characterized in that according to the principle of the motor, the stator of the motor is used as The stator of the motor screw pump uses the motor rotor made of permanent magnet material as the rotor of the motor screw pump. Ordinary screw pumps are driven by electric motors and rely on the motor to solve the axial force of the pump rotor. The power of the motor screw pump to convey the medium comes from the magnetic force of the coil instead of the usual motor. When conveying the medium, an axial force will be generated, causing the rotor to Because the pressure difference moves in the axial direction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C15/00
Inventor 施爱平叶丽华张银丽
Owner JIANGSU UNIV
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