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Magnetic pump shaft position online monitoring device and magnetic pump shaft position online monitoring method

A technology for monitoring devices and magnetic pumps, applied in measuring devices, using electrical devices, using electromagnetic means, etc., can solve the problems of greatly affecting the detection accuracy, detecting non-linear magnetic field, detecting wheel axial movement, etc., to reduce the detection accuracy The effect of improving the linearity and improving the measurement accuracy

Active Publication Date: 2016-06-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art has the following deficiencies: 1. The detection magnetic field generated by the detection probe along the radial direction of the magnetic pump shaft is seriously non-linear, which has a great influence on the detection accuracy
2. During the working process of the magnetic pump, the detection wheel often has axial movement and tilt, which reduces the detection accuracy

Method used

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  • Magnetic pump shaft position online monitoring device and magnetic pump shaft position online monitoring method
  • Magnetic pump shaft position online monitoring device and magnetic pump shaft position online monitoring method
  • Magnetic pump shaft position online monitoring device and magnetic pump shaft position online monitoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] refer to Figure 1 to Figure 9, The magnetic pump consists of a magnetic pump isolation sleeve (1), an outer magnetic rotor (2), an inner magnetic rotor (3), front and rear sliding bearings (4), a pump casing (5), a magnetic steel (6), an impeller (7), and a motor (8), connecting frame (9), inner sliding bearing bracket (10), motor shaft (13), magnetic pump shaft (14), sealing ring (15), the online monitoring device for the position of the magnetic pump shaft includes 2N detection probes (17), 2 detection probe covers (18), detection wheel (19), left detection probe outlet pipe (11), right detection probe outlet pipe (12) and intelligent magnetic pump shaft position online monitoring circuit board (39) .

[0062] Such as Figure 4. As shown, the inner and outer diameters and depths of the inner and outer diameters and depths of the ring-shaped slot on the magnetic pump spacer and the ring-shaped slot on the inner sliding bearing bracket are the same, and they are co...

Embodiment 2

[0086] Embodiment 2 On the basis of Embodiment 1, N is changed to 6, and the rest remain unchanged. refer to Figure 11, When N is equal to 6, the detection probe position distribution map.

Embodiment 3

[0088] Embodiment 3 On the basis of embodiment 1, the detection probe is changed into a magnetic conductor 5 (40), a magnetic conductor 3 (27), a magnetic conductor 4 (28), a magnetic field generator (42), a magnetic field sensitive body (43), Non-magnetic support 2 (41) constitutes;

[0089] The structure of the magnetic conductor 5 in the detection probe is as follows: Figure 14 Shown: where a is the main view, b is the left view.

[0090] The structure of the non-magnetic conductive bracket 2 in the detection probe is as follows: Figure 15 Shown: where a is the main view, b is the left view.

[0091] The magnetic field generating body (42) and the magnetic field sensitive body (43) are two ring-column coils respectively.

[0092] The magnetic conductor 4 is inserted from the right side of the magnetic conductor 3, the long rectangular side of the rectangular column body of the magnetic conductor 4 is parallel to the long rectangular side of the rectangular column-shape...

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Abstract

According to the existing magnetic pump shaft position online detection device, the relationship between the bearing shaft eccentricity of a magnetic pump and the change in magnetic resistance of the magnetic circuit is seriously nonlinear, the accuracy of detection differs under different magnetic pump shaft eccentricity, and the axial endplay and tilt of the magnetic pump shaft also influence the accuracy of detection. The invention discloses a novel magnetic pump shaft position online monitoring device and a novel magnetic pump rotating shaft position online monitoring method. The magnetic circuit structure of a detection probe is newly designed, and an additional rectangular magnetizer makes the relationship between the bearing shaft eccentricity of a magnetic pump and the change in magnetic resistance of the magnetic circuit of the detection probe nonlinear. The scheme has the following beneficial effects: (1) the influence of the change in magnetic pump shaft eccentricity on the accuracy of detection is reduced; (2) the influence of the axial endplay and tilt of the magnetic pump shaft on the accuracy of detection is reduced; (3) the linearity, stability, and reliability of magnetic pump shaft position sensors are improved; and (4) the accuracy of magnetic pump shaft position measurement is improved.

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 rotating shaft position of a magnetic pump. Background technique [0002] The magnetic pump is a sealless and leak-free pump. It consists of three parts: pump, permanent magnet coupling, and driving motor. The motor directly drives the outer rotor of the permanent magnet coupling. The magnetic field of the magnet on the outer rotor passes through the spacer sleeve and acts on the inner rotor magnet, and the inner rotor magnet drives the pump shaft. Drive the impeller in the pump body to rotate, and ensure that there is no leakage of the medium in the pump through the static isolation sleeve installed between the inner and outer magnetic rotors. [0003] Since the magnetic pump adopts a closed structure, the internal sliding bearings of the pump rely on the conveyed medium to realize their own lubrication and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02
Inventor 曾培
Owner JIANGSU UNIV
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