Mounting structure of axial-radial composite displacement detection sensor

Abstract

The utility model discloses an axial-radial composite displacement detection sensor mounting structure, which comprises a displacement sensor bracket sleeved on the periphery of a rotor, radial displacement sensors which are uniformly distributed along the circumferential direction and are used for detecting the radial displacement of the rotor and axial displacement sensors which are symmetrically arranged relative to the center of the displacement sensor bracket are arranged on the displacement sensor bracket; the displacement sensor support is provided with an installation groove matched with the radial displacement sensor and the axial displacement sensor. The side edge of the installation groove is provided with a notch used for collecting and leading out sensor signal lines. According to the utility model, the displacement sensors for axial and radial detection are integrated on the displacement sensor bracket, so that the mounting structure of the sensors is simplified, the structural assembly is facilitated, and the failure rate of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic suspension mechanical structure and displacement measurement, in particular to an axial radial composite displacement detection sensor installation structure. Background Art

[0002] The traditional axial sensor and radial sensor are two parts, which increases the length of the magnetic bearing rotor. The structural change leads to an increase in the load of the magnetic bearing, making the magnetic suspension equipment bulky, limiting the working conditions of the equipment and increasing the cost of the equipment.

[0003] For magnetic levitation equipment, an impeller is installed at one end of the rotor and an axial sensor is installed at the other end of the rotor. For magnetic levitation structures with impellers at both ends, a corresponding axial sensor detection disk must be installed on the rotor, which makes the rotor structure and structure complex and also increases the dynamic imbalance of the rotor. Utility Model Content

[0004] Technical purpose: In view of the above-mentioned deficiencies in the rotor displacement detection of the existing magnetic levitation equipment, the utility model discloses an axial radial composite displacement detection sensor installation structure.

[0005] Technical solution: To achieve the above technical objectives, the utility model adopts the following technical solution:

[0006] A mounting structure for an axial-radial composite displacement detection sensor comprises a displacement sensor bracket sleeved on the outer circumference of a rotor, on which radial displacement sensors for detecting radial displacement of the rotor and axial displacement sensors symmetrically arranged about the center of the displacement sensor bracket are arranged evenly distributed in the circumferential direction; the displacement sensor bracket is provided with a mounting groove matched with the radial displacement sensor and the axial displacement sensor, and a notch for collecting and leading out sensor signal lines is arranged on the side of the mounting groove.

[0007] Preferably, the axial displacement sensor and radial displacement sensor of the utility model are both fixed in the mounting groove through corresponding sensor adapter plates, and the sensor adapter plates are fixedly connected to the displacement sensor bracket through screws.

[0008] Preferably, the displacement sensor bracket of the utility model is arranged on the upper thrust magnetic bearing, and the displacement sensor bracket includes a fixing plate fixedly connected to the end face of the upper thrust magnetic bearing and an annular protrusion concentrically arranged with the fixing plate, the outer surface of the annular protrusion is interference fit connected with the inner ring of the upper thrust magnetic bearing, and the mounting groove is opened on the annular protrusion.

[0009] Preferably, a detection ring is provided on the rotor of the utility model at a position corresponding to the displacement sensor bracket, and a clearance fit is formed between the annular protrusion and the detection ring.

[0010] Beneficial effects: The axial radial composite displacement detection sensor installation structure provided by the utility model has the following beneficial effects:

[0011] 1. The utility model integrates the displacement sensors for axial and radial detection on the displacement sensor bracket, simplifies the installation structure of the sensor, facilitates structural assembly, and reduces the failure rate of the equipment.

[0012] 2. The sensor installation structure of the utility model can reduce the length of radial sensor detection and improve the utilization efficiency and motion response sensitivity of the radial magnetic bearing.

[0013] 3. The utility model sets the sensor in the installation groove, routes the signal line through the installation groove, and leads it out through the notch, which is convenient for structural assembly, improves the stability of the sensor installation structure, and ensures that the equipment can stably perform rotor status detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 Schematic diagram of the sensor installation structure and the rotor matching of the utility model;

[0017] Among them, 1-rotor, 2-displacement sensor bracket, 3-radial displacement sensor, 4-axial displacement sensor, 5-mounting slot, 6-sensor signal line, 7-notch, 8-sensor adapter plate, 9-screw, 10-upper thrust magnetic bearing, 11-fixing plate, 12-annular protrusion, 13-detection ring. DETAILED DESCRIPTION

[0018] Reference will now be made in detail to embodiments of the present disclosure, one or more examples of which are set forth herein below. Each embodiment and example is provided by explaining the apparatus, composition and materials of the present disclosure, rather than limiting. On the contrary, the following description provides a convenient illustration of an exemplary embodiment for implementing the present disclosure. In fact, it will be clear to those skilled in the art that various modifications and variations can be made in the teachings of the present disclosure without departing from the scope or spirit of the present disclosure. For example, a feature shown or described as a part of an embodiment can be used in conjunction with another embodiment to produce yet another embodiment. It is expected that the present disclosure covers such modifications and variations within the scope of the appended claims and their equivalents. Other objects, features and aspects of the present disclosure are disclosed in or clear from the following detailed description. It will be understood by those of ordinary skill in the art that this discussion is only a description of exemplary embodiments and is not intended to limit the wider aspects of the present disclosure.

[0019] like Figure 1 and Figure 2 As shown, the utility model discloses an axial-radial composite displacement detection sensor installation structure, including a displacement sensor bracket 2 sleeved on the outer periphery of a rotor 1, on which radial displacement sensors 3 uniformly distributed along the circumferential direction for detecting the radial displacement of the rotor 1 and axial displacement sensors 4 symmetrically arranged about the center of the displacement sensor bracket 2 are arranged; the displacement sensor bracket 2 is provided with an installation groove 5 matched with the radial displacement sensor 3 and the axial displacement sensor 4, and the side of the installation groove 5 is provided with a notch 7 for collecting and leading out the sensor signal line 6.

[0020] The displacement sensor bracket 2 of the utility model is arranged on the upper thrust magnetic bearing 10, and the displacement sensor bracket 2 includes a fixing plate 11 fixedly connected to the end face of the upper thrust magnetic bearing 10 and an annular protrusion 12 concentrically arranged with the fixing plate 11, the outer surface of the annular protrusion 12 is connected with the inner ring of the upper thrust magnetic bearing 10 by interference fit, and the mounting groove 5 is opened on the annular protrusion 12; a detection ring 13 is arranged on the rotor 1 at a corresponding position of the displacement sensor bracket 2, the detection ring 13 is a part of the rotor 1, and the annular protrusion 12 and the detection ring 13 are clearance-fitted.

[0021] The structural design of the displacement sensor bracket 2 of the utility model makes the rotor of the magnetic bearing more compact during the design process. Under the condition of meeting the same working conditions and design requirements, the weight of the rotor is lighter and the control sensitivity of the magnetic bearing is higher. On the other hand, it is beneficial to improve the natural mode of the rotor, thereby increasing the limiting speed range of the rotor.

[0022] To facilitate the assembly of the sensors, the axial displacement sensor 4 and radial displacement sensor 3 of the utility model are fixed in the mounting groove 5 through the corresponding sensor adapter plate 8, and the sensor adapter plate 8 is fixedly connected to the displacement sensor bracket 2 through screws 9; in the embodiment of the utility model, the mounting groove 5 of the displacement sensor bracket 2 has four evenly distributed holes in the radial direction of the groove for placing the radial displacement sensor 3, which is used to detect the radial displacement change of the detection ring 13, and the four axially symmetrical grooves are used to install the axial displacement sensor 4 to detect the axial displacement change of the detection ring. After the sensor installation and wiring are completed, the mounting groove 5 is sealed by filling sealant.

[0023] The utility model integrates radial and axial detection sensors on the sensor bracket, which can simplify the detection structure and reduce the failure rate of the equipment. At the same time, the sensor bracket is fixed on the upper thrust magnetic bearing, which improves the utilization efficiency of the magnetic pulling force of the radial magnetic bearing and the motion response sensitivity, thereby improving the performance of the equipment and realizing accurate monitoring of the rotor displacement.

Claims

1. An axial radial composite displacement detection sensor installation structure, characterized in that: The invention comprises a displacement sensor bracket (2) sleeved on the outer circumference of a rotor (1), on which radial displacement sensors (3) for detecting radial displacement of the rotor (1) and axial displacement sensors (4) arranged symmetrically about the center of the displacement sensor bracket (2) are arranged evenly distributed in the circumferential direction; the displacement sensor bracket (2) is provided with a mounting groove (5) matched with the radial displacement sensor (3) and the axial displacement sensor (4), and a notch (7) for collecting and leading out sensor signal lines (6) is arranged on the side of the mounting groove (5).

2. The axial-radial composite displacement detection sensor installation structure according to claim 1, characterized in that: The axial displacement sensor (4) and the radial displacement sensor (3) are both fixed in the mounting groove (5) via corresponding sensor adapter plates (8), and the sensor adapter plate (8) is fixedly connected to the displacement sensor bracket (2) via screws (9).

3. The axial-radial composite displacement detection sensor installation structure according to claim 1, characterized in that: The displacement sensor bracket (2) is arranged on the upper thrust magnetic bearing (10), and the displacement sensor bracket (2) comprises a fixing plate (11) fixedly connected to the end surface of the upper thrust magnetic bearing (10) and an annular protrusion (12) arranged concentrically with the fixing plate (11), the outer surface of the annular protrusion (12) is connected to the inner ring of the upper thrust magnetic bearing (10) by interference fit, and the mounting groove (5) is provided on the annular protrusion (12).

4. The axial-radial composite displacement detection sensor installation structure according to claim 3, characterized in that: A detection ring (13) is provided on the rotor (1) at a position corresponding to the displacement sensor bracket (2), and a clearance fit is provided between the annular protrusion (12) and the detection ring (13).

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