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On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler

A permanent magnet coupling and monitoring device technology, applied in the direction of measuring devices, electrical devices, instruments, etc., can solve the problems of increased signal leads, complex detection coil wiring, overlapping wires, etc., to expand the scope of application and eliminate major hidden dangers Effect

Inactive Publication Date: 2009-07-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1. The detection coil described in this patent requires multiple signal processing channels, so the interference and error are relatively large
2. The layout of the detection coil based on the design of the magnetic flux change is complicated, and the wires need to overlap, and because part of the magnetic flux cancels each other, the signal utilization rate is low
3. Multiple sets of detection coils are independent, which increases the number of signal leads and causes interference

Method used

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  • On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler
  • On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler
  • On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler

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Embodiment 1

[0026] Example 1. Reference Figure 4 , Figure 5 , Figure 8 In this embodiment, the on-line monitoring method and device for the permanent magnet coupling gap of the magnetic drive pump assume that the number of magnets in the permanent magnet coupling is 10, and the detection wires are arranged in a rectangular shape. Three sets of detection wires 7-8, 9-10, 11-12 are laid out, among which the detection wires 7, 9, 11 are separated by 120 degrees in mechanical angle and 120 degrees in electrical angle, and the detection wires 7-8, 9-10, 11- 12 have a difference of 36 degrees in mechanical angle, that is, 180 degrees in electrical angle. Six detection wires are connected in series to form a detector. The detector is composed of a flexible film printed circuit or enameled wire according to the reference Figure 4 , Figure 5 , Figure 8 The method is to discharge along the axial direction of the isolation sleeve and glue it to the isolation sleeve. There are 5 pairs of ...

Embodiment 2

[0030] Example 2. Reference Figure 6 , Figure 7 , Figure 9 , assuming that the number of permanent magnet coupling magnets is 10, the detection wires are arranged in a rectangular shape, and three groups of detection wires 7-8-13-14, 9-10- 15-16, 11-12-17-18, wherein the detection wires 7, 9, 11 are separated by a mechanical angle of 120 degrees, and the detection wires 7-8-13-14, 9-10-15-16, 11-12-17- 18 respectively with a mechanical angle difference of 36 degrees. 12 detection wires are connected in series to form a detector. The detector is made of a flexible film printed circuit or enameled wire according to the reference Figure 6 , Figure 7 , Figure 9 The method is to discharge along the axial direction of the isolation sleeve and glue it to the isolation sleeve. There are 5 pairs of power generation wires, with a mechanical angle difference of 36 degrees, connected in series, made of flexible film printed circuit or enameled wire according to the reference ...

Embodiment 3

[0031] Example 3. Reference Figure 10 , assuming that the number of magnets in the permanent magnet coupling is 10, the detection wires are arranged in a rectangular shape, and two sets of detection wires are arranged at the side end of the outer ring surface of the spacer sleeve at a distance of 180 degrees along the radial circumference, and there are 4 detection wires in each group , 36 degrees apart. All detection wires are connected in series in turn to form a detector, and there are only two lead-out ends. The detector is made of flexible film printed circuit or enameled wire according to the reference Figure 10 The method is to discharge along the axial direction of the isolation sleeve and glue it to the isolation sleeve. There are 5 pairs of power generation wires, with a mechanical angle difference of 36 degrees, connected in series, made of flexible film printed circuit or enameled wire according to the reference Figure 10 The method is to discharge along the ...

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Abstract

The invention provides an online monitoring method and device for the clearance of a permanent magnet coupling of a magnetic pump, which can realize online monitoring of the wear state of the sliding bearing of the magnetic pump, by setting no less than two sets of detection in the radial direction on the surface of the outer ring of the isolation sleeve wire. Each group of detection wires is composed of an even number of detection wires, all the detection wires are connected in series, and the motional electromotive force signal is generated by cutting the gap magnetic field of the permanent magnet coupling. The sum is zero. The detection signal is obtained by the detection wire, led out to be amplified and filtered, and then sent to the display to dynamically display the gap status of the permanent magnet coupling of the magnetic pump, and to compare and judge at the same time, and send an alarm signal when the limit value is reached. The invention can accurately reflect the radial gap between the inner and outer rotors of the permanent magnet coupling of the magnetic pump, has reliable performance, is convenient for installation and debugging, and has reasonable structural design, thereby improving the operation safety and reliability of the magnetic pump.

Description

Technical field [0001] The invention belongs to the field of displacement measurement. In particular, it refers to a method and device for on-line monitoring of the clearance of a permanent magnet coupling of a magnetic drive pump. Background technique [0002] The magnetic pump is a sealless and leak-free pump. It is composed of three parts: pump body, permanent magnet coupling and drive motor. The motor directly drives the outer rotor of the permanent magnet coupling, and the magnetic field of the magnet on the outer rotor passes through the isolation sleeve and acts on the magnet of the inner rotor to drive the pump to work. The spacer sleeve separates the pump from the power section for leak-free power transmission. Since the magnetic transmission pump adopts a closed structure, the internal sliding bearings of the pump rely on the conveyed medium to achieve their own lubrication and cooling, while the medium conveyed by the magnetic pump is often poor in lubricity, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/14
Inventor 曾培
Owner JIANGSU UNIV