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On-line monitoring device and method for rotating shaft position of magnetic pump

A monitoring device, a technology of a magnetic pump, which is applied to a measuring device, a component of a pumping device for elastic fluid, and an electrical device, etc., can solve problems such as fire, loose rotor parts, and poor medium lubricity, and achieve a monitoring method. Accurate and reliable, avoid leakage accident, simple device structure

Inactive Publication Date: 2010-06-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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, and the sliding bearings are often severely worn due to poor lubrication. The radial gap with the shaft increases, the rotor parts rotate loosely, the rotor center deviates from the shaft geometric center, and when the sliding bearing wears seriously, coupled with the original mechanical eccentricity of the magnetic pump installation, it will cause friction between the rotor and the stator in the magnetic pump, especially The magnetic rotor in the magnetic pump rubs against the sealing isolation sleeve
If it is not detected in time, the inner magnetic rotor will wear through the sealing sleeve, which will not only cause medium leakage, but also may cause a fire

Method used

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  • On-line monitoring device and method for rotating shaft position of magnetic pump
  • On-line monitoring device and method for rotating shaft position of magnetic pump
  • On-line monitoring device and method for rotating shaft position of magnetic pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] refer to figure 1 The magnetic pump is composed of a magnetic pump spacer 1, an outer magnetic rotor 2, an inner magnetic rotor 3, and front and rear sliding bearings 4. The impeller 7 is installed in the magnetic pump fluid sealing system, and the motor 8 drives the magnetic pump shaft to rotate. The device includes a detection probe flange 6 and a detection wheel 5 . Wherein the detection probe flange 6 is located in the fluid sealing system of the magnetic pump. There are two sealing rings 10 to isolate the radially outer end surface of the detection probe flange 6 and the outlet hole 11 from the sealing fluid inside the magnetic pump.

[0038] refer to Figure 7 The test probe flange 6. The detection probe is composed of four identical detection sensors, and the included angle between each detection sensor in the radial direction of the rotating shaft of the magnetic pump is 90 degrees. The example of the closed magnetic circuit that detection sensor and detection...

Embodiment 2

[0040] refer to figure 2 The structural diagram of another online monitoring device for the rotating shaft position of a magnetic pump, which includes a detection probe flange 6 and a detection wheel 5. Wherein the detection probe flange 6 is located on the outer surface of the isolation sleeve 1 of the magnetic pump. The structure of the detection probe flange 6 is the same as that in Embodiment 1.

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Abstract

The invention discloses a magnetic pump rotating shaft position online monitoring device and a method thereof; a detecting probe flange is fixed on a non-rotor of a magnetic pump, a detecting wheel isfixed on a rotating shaft of the magnetic pump, positioned in a through hole in the center of the detecting probe flange and is coaxial with the detecting probe flange; a detection sensor consists ofa magnetic field generating body and a magnetizer and forms a closed magnetic circuit together with the detecting wheel. When the position of the rotating shaft of the magnetic pump changes, the gaplength between the detecting wheel and the detecting probe flange changes, and the magnetic resistance of the closed magnetic circuit simultaneously changes; response signals of a magnetic field sensitive body are received by a signal conditioning circuit, and then is output to a signal treating circuit board; after program analysis, the situation of the position of a biggest rotating shaft of themagnetic pump is transmitted from a long distance in a way of electrical signal. The invention can detect the position of the rotating shaft of the magnetic pump in an on-line way in time, forecast and find the friction occurring between the rotor in the magnetic pump and a separation sleeve of the magnetic pump, and avoid the leakage accident; the device has simple structure as well as accurateand reliable monitoring method.

Description

technical field [0001] The invention relates to a device and method for on-line measurement of displacement by using a sensor, in particular to a device and method for on-line monitoring of the position of a rotating shaft of a magnetic pump. Background technique [0002] The magnetic pump uses the permanent magnetic force between the inner and outer magnetic rotors of the permanent magnetic coupling to drive the impeller in the pump body to rotate, and the static isolation sleeve installed between the inner and outer magnetic rotors ensures that the pump medium does not leak. The pump rotor consists of an inner magnetic rotor, a pump shaft and an impeller, radially supported by front and rear sliding bearings. [0003] 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, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/00F04D29/046F04D29/043
Inventor 曾陪
Owner JIANGSU UNIV