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Device for online-monitoring of internal-external magnetic steel gap of a magnetic pump permanent coupler

A permanent magnet coupling and monitoring device technology, applied in measuring devices, electrical devices, instruments, etc., can solve the problems of inability to truly reflect wear conditions, large differential superposition total output voltage amplitude, and accuracy errors, etc. The effect of eliminating major hidden dangers and expanding the scope of application

Inactive Publication Date: 2011-07-06
JIANGSU XINTENGYU FLUID EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The differential superposition total output voltage curve 19 should be zero, but from Figure 7 It can be seen from the waveform 19 in the figure that the total output voltage amplitude of the differential superposition is relatively large, which forms interference in the application of magnetic pump wear measurement, so that there is a large error in the accuracy of the measurement, and it cannot truly reflect the wear condition

Method used

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  • Device for online-monitoring of internal-external magnetic steel gap of a magnetic pump permanent coupler
  • Device for online-monitoring of internal-external magnetic steel gap of a magnetic pump permanent coupler
  • Device for online-monitoring of internal-external magnetic steel gap of a magnetic pump permanent coupler

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Embodiment 1

[0019] refer to figure 1 , figure 2 , image 3 , Figure 4 , In this embodiment, the on-line monitoring device for the internal and external magnetic steel gap of the permanent magnetic coupling of the magnetic pump assumes that the number of external magnetic steel of the permanent magnetic coupling is 12, and the number of bearing gap detectors is 3 groups, separated by 120 degrees from each other. Each group of bearing clearance detectors consists of two detection wires, the interval angle is 30 degrees, and they are located on the outer surface of the isolation sleeve of the magnetic pump.

[0020] Figure 6 It is a bearing gap detector and a signal processing display circuit. The bearing gap detector is located on the outer surface of the isolation sleeve of the magnetic force pump. The signal processing display circuit can be installed in a certain position near the magnetic force pump shell or the magnetic force pump. Several groups of bearing gap detectors 6 are r...

Embodiment 2

[0022] refer to figure 1 , Figure 5 , assuming that the number of outer magnets of the permanent magnet coupling is 12, and the number of bearing gap detectors is 6, separated by 60 degrees from each other. Each group of bearing clearance detectors consists of two detection wires, the interval angle is 30 degrees, and they are located on the outer surface of the isolation sleeve of the magnetic pump.

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Abstract

The invention provides a device for the online-monitoring of an internal-external magnetic steel gap of a magnetic pump permanent coupler, which can realize the online-monitoring of the status of the internal-external magnetic steel gap of the magnetic pump permanent coupler. A plurality of groups of bearing gap detectors are radially arranged on the surface of an isolating sleeve outer ring; after passing through a signal converting circuit and a processing circuit, signals are sent to a displayer for dynamically displaying the gap status of the magnetic pump permanent coupler and are compared and judged so that an alarm signal is sent when a limit value is reached. Each group of bearing gap detectors at least comprises at least detection lead wires with a number which is even number times of two; the space angles among the detection lead wires in each group is the integral multiple of the ratio between 360 DEG and the number of magnetic pump external magnetic steels, wherein the integral multiple value is less than the number of the magnetic pump external magnetic steels; and each detection lead wire in each group have only two terminals on the whole. The invention can accurately reflect the radial gap of the internal-external magnetic steels of the magnetic pump permanent coupler, has reliable performance and reasonable structural design, is convenient to install and debug and improves the 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 an on-line monitoring device for the internal and external magnetic steel gap of the permanent magnetic coupling of the magnetic drive pump. Background technique [0002] The magnetic pump realizes leakage-free power transmission by permanent magnetic coupling. Since the magnetic pump adopts a closed structure, the sliding bearing inside the pump relies on the conveyed medium to realize its own lubrication and cooling. The sliding bearing is often worn seriously due to poor lubrication. After the wear, the radial gap between the bearing bush and the shaft increases, and the rotor parts rotate loose. , the center of the rotor deviates from the geometric center of the shaft. When the sliding bearing wears seriously, it will cause friction between the inner magnetic rotor and the sealing spacer sleeve. If it is not found in time, the inner magnetic rotor will wear...

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 XINTENGYU FLUID EQUIP MFG