An eddy current sensor body, an eddy current sensor, a sensor fixing assembly and a magnetic levitation motor

Abstract

The utility model provides a kind of eddy current sensor main body, eddy current sensor, sensor fixed subassembly and magnetic suspension motor, and the eddy current sensor main body includes body, winding part and adjusting part, winding part and adjusting part are respectively arranged at the both ends of body;Winding groove is formed on winding part;Adjusting clamping groove compatible with the appearance of adjusting tool is formed on adjusting part;Thread is provided on the outer circumferential surface of body;When the eddy current sensor main body is installed, adjusting tool can be inserted into adjusting clamping groove, and adjusting tool is rotated, drives the rotation of eddy current sensor main body, to adjust the distance between winding part and measured component, and the eddy current sensor is adjusted conveniently and quickly.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and in particular to an eddy current sensor body, an eddy current sensor, a sensor fixing assembly, and a magnetic levitation motor. Background Technology

[0002] Eddy current sensors can accurately measure the static and dynamic relative displacement changes between the measured object and the probe end face. In the state analysis, vibration study, and analysis and measurement of high-speed rotating machinery and reciprocating motion machinery, they can continuously and accurately collect various parameters of moving parts, such as the radial vibration of the shaft and the motion state of the measured part.

[0003] Because eddy current sensors have a limited detection range, the distance between the sensor head and the measured component needs to be precisely adjusted during installation. In existing technologies, eddy current sensors are inconvenient to adjust after installation, making it impossible to precisely adjust the distance between the sensor and the measured component. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides an eddy current sensor column, an eddy current sensor, a sensor fixing assembly, and a magnetic levitation motor.

[0005] A first aspect of this application provides an eddy current sensor body, including a body, a winding portion, and an adjustment portion;

[0006] The outer circumferential surface of the body is provided with threads;

[0007] The winding portion and the adjustment portion are respectively disposed at both ends of the main body; the winding portion includes a winding body, and a winding groove is formed on the outer peripheral surface of the winding body;

[0008] A pin hole is formed on the end face of the main body near the adjustment part;

[0009] An adjustment slot is formed on the adjustment part.

[0010] In some embodiments of this application, at least one first wire-passing channel is formed between the winding groove and the body;

[0011] At least one second threading channel is formed on the main body; the second threading channel extends toward the adjustment part and penetrates the main body.

[0012] In some embodiments of this application, the first threading channel extends radially along the winding body; the second threading channel is disposed inside the body and extends axially along the body; the second threading channel communicates with the first threading channel.

[0013] In some embodiments of this application, the first threading channel is disposed on the outer periphery of the winding body and extends along the axial direction of the winding body; the second threading channel is disposed on the outer periphery of the body and extends along the axial direction of the body.

[0014] In some embodiments of this application, the adjustment part includes an adjustment body, on which a third threading channel is formed; the third threading channel extends toward the pin hole and penetrates the adjustment body.

[0015] In some embodiments of this application, the height of the bottom wall of the third threading channel is lower than the height of the bottom wall of the adjusting slot.

[0016] In some embodiments of this application, the adjusting body is a cylinder, a frustum, a prism, or an elliptical cylinder.

[0017] In some embodiments of this application, the adjustment slot is a straight slot, a cross-shaped slot, a star-shaped slot, a hexagonal slot, or a cross-shaped slot.

[0018] In some embodiments of this application, there are two pin holes, which are spaced apart.

[0019] In some embodiments of this application, at least one positioning surface is formed on the outer peripheral surface of the body.

[0020] A second aspect of this application provides an eddy current sensor, including the aforementioned eddy current sensor body, wires, and guide.

[0021] The wire is wound in the winding groove of the eddy current sensor body to form a sensor coil; the guide is inserted into the pin hole of the eddy current sensor body; the end of the wire is fixed on the guide.

[0022] A third aspect of this application provides a sensor mounting assembly, including the aforementioned eddy current sensor and a mounting structure; the mounting structure is annular, and the mounting structure has a sensor mounting hole extending radially along the circumferential direction; the eddy current sensor is mounted in the sensor mounting hole.

[0023] In a fourth aspect, this application provides a magnetic levitation motor, including the aforementioned sensor fixing assembly.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects: The eddy current sensor body of this application includes a main body, a winding part, and an adjustment part, with the winding part and the adjustment part respectively disposed at both ends of the main body; a winding groove is formed on the winding part; an adjustment slot adapted to the shape of the adjustment tool is formed on the adjustment part; a thread is provided on the outer peripheral surface of the main body; after the eddy current sensor body is installed, the adjustment tool can be inserted into the adjustment slot, and the adjustment tool can be rotated to drive the eddy current sensor body to rotate, so as to adjust the distance between the winding part and the measured part. The adjustment of the eddy current sensor is convenient and quick.

[0025] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description

[0026] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the eddy current sensor body provided in an exemplary embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the eddy current sensor body provided in an exemplary embodiment of this application;

[0029] Figure 3 This is a side view of the main body of an eddy current sensor provided in an exemplary embodiment of this application;

[0030] Figure 4 This is the book Figure 3 Sectional view at point BB;

[0031] Figure 5 This is a bottom view of the main body of an eddy current sensor provided in an exemplary embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the structure of the eddy current sensor body provided in an exemplary embodiment of this application;

[0033] Figure 7 This is a schematic diagram of the structure of the eddy current sensor body provided in an exemplary embodiment of this application;

[0034] Figure 8 A front view of the eddy current sensor body provided in an exemplary embodiment of this application;

[0035] Figure 9 This is a bottom view of the main body of an eddy current sensor provided in an exemplary embodiment of this application;

[0036] Figure 10 This is a schematic diagram of the structure of the eddy current sensor body provided in an exemplary embodiment of this application;

[0037] Figure 11 This is a schematic diagram of the structure of the eddy current sensor body provided in an exemplary embodiment of this application;

[0038] Figure 12 This is a front view of the eddy current sensor body provided in an exemplary embodiment of this application;

[0039] Figure 13 This is a bottom view of the main body of an eddy current sensor provided in an exemplary embodiment of this application;

[0040] Figure 14 This is a schematic diagram of the structure of a sensor fixing assembly provided in an exemplary embodiment of this application.

[0041] In the picture:

[0042] 1A. Fixed structure; 1B. Eddy current sensor;

[0043] 10. Main body; 101. Second threading channel; 102. Pin hole; 104. Positioning surface; 105. Fourth threading channel;

[0044] 20. Winding section; 201. Winding body; 202. Winding groove; 203. First threading channel;

[0045] 30. Adjustment section; 301. Adjustment body; 302. Adjustment slot; 303. Third threading channel. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0047] Eddy current sensors can accurately measure the static and dynamic relative displacement changes between the measured object and the probe end face. In the state analysis, vibration study, and analysis and measurement of high-speed rotating machinery and reciprocating motion machinery, they can continuously and accurately collect various parameters of moving parts, such as the radial vibration of the shaft and the motion state of the measured part.

[0048] Because eddy current sensors have a limited detection range, the distance between the sensor head and the measured component needs to be precisely adjusted during installation. In existing technologies, eddy current sensors are inconvenient to adjust after installation, making it impossible to precisely adjust the distance between the sensor and the measured component.

[0049] Based on this, an exemplary embodiment of this application provides an eddy current sensor body, an eddy current sensor, a sensor fixing assembly, and a magnetic levitation motor. The eddy current sensor body includes a main body, a winding portion, and an adjustment portion, with the winding portion and the adjustment portion respectively disposed at both ends of the main body. A winding groove is formed on the winding portion; an adjustment slot adapted to the shape of an adjustment tool is formed on the adjustment portion; and threads are provided on the outer peripheral surface of the main body. After the eddy current sensor body is installed, an adjustment tool can be inserted into the adjustment slot, and the adjustment tool can be rotated to drive the eddy current sensor body to rotate, so as to adjust the distance between the winding portion and the measured component. The adjustment of the eddy current sensor is convenient and quick.

[0050] Example 1:

[0051] An exemplary embodiment of this application provides an eddy current sensor body, such as Figures 1 to 5 As shown, the eddy current sensor includes a body 10, a winding part 20, and an adjustment part 30. The outer circumferential surface of the body 10 is provided with threads. The sensor mounting hole has an internal thread that matches the external thread on the body 10. Thus, by using the external thread on the body 10 and the internal thread in the sensor mounting hole, the body 10 can be adjusted within the sensor mounting hole. This allows for adjustment of the distance between the eddy current sensor and the measured component, ensuring the eddy current sensor is within its optimal measurement range and improving the sensor's measurement accuracy.

[0052] The winding portion 20 and the adjusting portion 30 are respectively disposed at both ends of the main body 10; preferably, the main body 10, the winding portion 20, and the adjusting portion 30 are integrally formed and are all made of non-metallic materials, such as fiber-reinforced plastics or composite materials. During installation, the winding portion 20 is positioned towards the component being measured, and the adjusting portion 30 is positioned away from the component being measured. The winding portion 20 includes a winding body 201, and a winding groove 202 is formed on the outer peripheral surface of the winding body 201; a wire is wound in the winding groove 202 to form a sensor coil; preferably, the diameter of the wire in this application is between 0.05 mm and 0.2 mm. After the wire is wound in the winding groove 202, the formed sensor coil has two free ends.

[0053] like Figure 1 and 5As shown, there are two pin holes 102. A first pin hole and a second pin hole are formed at intervals on one end face of the body 10 near the adjusting part 30. An adjusting groove 302 adapted to the shape of the adjusting tool is formed on the adjusting part 30. The adjusting tool can be a screwdriver. The shape of the adjusting groove 302 can be various, such as a slotted groove, a cross-shaped groove, a star-shaped groove, a hexagonal groove, or a slotted groove. For ease of processing, such as... Figure 2 As shown, the adjustment slot 302 is preferably a straight slot.

[0054] To facilitate the installation of wires and prevent the wires from affecting the convenience and accuracy of adjustment when adjusting the eddy current sensor later, at least one first wire-passing channel 203 is formed between the winding groove 202 and the body 10; at least one second wire-passing channel 101 is formed on the body 10.

[0055] For example, such as Figure 4 As shown, two first wire-passing channels 203 are provided between the winding groove 202 and the main body 10, and the two first wire-passing channels 203 are arranged at intervals. Preferably, the two first wire-passing channels 203 are arranged symmetrically about an axis, and the first wire-passing channels 203 extend radially along the winding body 201. At this time, the two free ends of the wire are respectively inserted into one of the first wire-passing channels 203.

[0056] In another exemplary embodiment, to facilitate processing and reduce processing complexity, only one first threading channel 203 may be provided; in this case, both free ends of the wire are inserted into one first threading channel 203. The first threading channel 203 and the winding groove 202 are interconnected by an elliptical process groove, and the wire can pass through the process groove and enter the first threading channel 203.

[0057] The second threading channel 101 extends through the body 10 towards the adjustment section 30. For example, as shown... Figure 4 As shown, a second threading channel 101 is provided at the center of the main body 10 along the axial direction of the main body 10. For ease of processing, the second threading channel 101 extends towards and passes through the winding portion 20. The cross-sectional shape of the second threading channel 101 can be circular, triangular, polygonal, etc., but a circular shape is preferred for ease of processing. The second threading channel 101 is connected to the first threading channel 203. The wire passes through the first threading channel 203, enters the second threading channel 101, and exits the main body 10 along the direction of the second threading channel 101 toward the adjustment portion 30.

[0058] For example, the adjustment unit 30 includes an adjustment body 301, on which a third threading channel 303 is formed; the third threading channel 303 extends toward the first pin hole and the second pin hole and passes through the adjustment body 301. Preferably, the third threading channel 303 and the adjustment slot 302 are arranged intersectingly, forming a cross-shaped groove between them, which can accommodate the adjustment tool with the cross-shaped end. After the wire passes through the second threading channel 101, it passes through the third threading channel 303 and is then fixed to the first pin or the second pin.

[0059] Preferably, the height of the bottom wall of the third wire channel 303 is lower than the height of the bottom wall of the adjustment slot 302. When the adjustment tool is inserted into the adjustment slot 302 to adjust the position of the eddy current sensor, the adjustment tool will not press on the wire and will not damage the wire because the wire is attached to the bottom wall of the third wire channel.

[0060] The shape of the adjustment body 301 can be selected in a variety of ways. For example, the adjustment body 301 can be a cylinder, a frustum, a prism, or an elliptical cylinder.

[0061] The adjustment part 30 can also be recessed into the body 10. An adjustment groove 302 and a third threading channel 303 are formed on the end face of the body 10 away from the winding part 20, which are recessed into the body 10. The third threading channel 303 extends in the direction of the first pin hole 102 and the second pin hole 103.

[0062] For example, the first pin hole and the second pin hole are respectively located on both sides of the adjustment slot 302. At this time, the distance between the first pin hole and the second pin hole is large, which can facilitate the fixing of wires. At the same time, it is suitable for miniaturized eddy current sensors.

[0063] The first and second pin holes can also be located on one side of the adjustment slot 302. In this case, the distance between the first and second pin holes is relatively small, which is suitable for situations where the eddy current sensor is large in size.

[0064] Preferably, the first pin hole and the second pin hole are symmetrically arranged; and the first pin hole and the second pin hole are located between the outer peripheral surface of the adjusting part 30 and the outer peripheral surface of the body 10, which facilitates fixing the wire.

[0065] Example 2:

[0066] Based on Embodiment 1 described above, the main difference between this embodiment and Embodiment 1 is that, in this embodiment, at least one positioning surface 104 is formed on the outer peripheral surface of the body 10. Preferably, as follows... Figures 6 to 9As shown, two symmetrically arranged positioning surfaces 104 are provided on the outer circumferential surface of the body 10. The two positioning surfaces 104 can be set at any position on the circumferential surface of the body 10. When the size of the sensor is small, such as when the diameter of the body 10 is less than 5mm, the positioning surfaces 104 are set at a position away from the first pin hole 102 and the second pin hole 103.

[0067] Preferably, for ease of processing, the positioning surface 104 is a plane. In this way, the positioning surface 104 can be clamped by the positioning fixture, and multiple eddy current sensors can be positioned at the same time, so as to facilitate the batch insertion of multiple eddy current sensors. The positioning surface 104 can also be a stepped surface or a curved surface, as long as it is used with the corresponding positioning fixture to achieve the positioning of the eddy current sensor.

[0068] In this application, in order to facilitate the batch insertion of multiple eddy current sensors, the positioning surface 104 is a plane and is parallel to the line connecting the center of the first pin hole and the center of the second pin hole.

[0069] Example 3:

[0070] Based on the above embodiment 1 or 2, this embodiment differs from embodiment 1 or 2 in that, in this embodiment, as... Figures 10 to 13 As shown, the first threading channel 203 is disposed on the outer periphery of the winding body 201 and extends along the axial direction of the winding body 201; the second threading channel 101 is disposed on the outer periphery of the body 10 and extends along the axial direction of the body 10. The first threading channel 203 and the second threading channel 101 are interconnected.

[0071] Preferably, there are two first wire-passing channels 203 and two second wire-passing channels 101, and they are arranged symmetrically along the axis. The second wire-passing channel 101 is arranged in a one-to-one correspondence with the first wire-passing channel 203, and the two extend in the same direction and are interconnected, which facilitates the wires to pass through the first wire-passing channel 203 and the second wire-passing channel 101.

[0072] To facilitate the laying of wires, such as Figure 13 As described above, a fourth threading channel 105 is also provided on the end face of the main body 10. The fourth threading channel 105 extends along the direction of the first pin hole and the second pin hole and connects to the second threading channel 101. At this time, a third threading channel 303 may or may not be provided on the adjustment part 30. If the third threading channel 303 is provided on the adjustment part 30, the third threading channel 303 and the adjustment slot 302 can be adapted to various adjustment tools.

[0073] Example 4:

[0074] An exemplary embodiment of this application provides an eddy current sensor, which includes an eddy current sensor body, a wire, and a guide as described in any one of embodiments 1 to 3. The wire is wound in the winding groove 202 of the eddy current sensor body to form a sensor coil; the guide is inserted into the pin hole 102 of the eddy current sensor body; and the end of the wire is fixed to the guide.

[0075] Preferably, the guide includes a first guide and a second guide; the first guide is inserted into a first pin hole, and the second guide is inserted into a second pin hole; both the first and second guides are made of materials with good conductivity, such as copper, silver, aluminum, or other metals. One wire is fixed to the first guide and the other is fixed to the second guide. The wires can be fixed to the first and second guides by soldering, or by other fixing methods such as bonding. To improve the stability of the eddy current sensor, the wires are preferably fixed to the first and second guides by soldering.

[0076] The two ends of the wire pass through the first wire channel 203 and the second wire channel 101 in sequence, reach the end of the body 10, and are fixed on the first and second guides.

[0077] When there is a four-way wire channel 105, the wire enters the fourth-way wire channel 105 from the second-way wire channel 101 and is fixed on the first and second guides.

[0078] By fixing the wires with the first and second guides, connecting the first guide, the second guide, and the circuit board with a cable, inserting the first guide into the first pin hole, and inserting the second guide into the second pin hole, the wires can be firmly fixed, preventing the guide relative to the eddy current sensor body from shifting and affecting the measurement accuracy. At the same time, it facilitates the electrical connection between the eddy current sensor and the circuit board.

[0079] Example 5:

[0080] An exemplary embodiment of this application provides a sensor fixing assembly, which includes an eddy current sensor 1B and a fixing structure 1A as described in Embodiment 4; Figure 14 As shown, the fixing structure 1A is annular, and a sensor mounting hole extending radially is formed along the circumference of the fixing structure 1A; the eddy current sensor 1B is installed in the sensor mounting hole. A sensor mounting groove is formed on one side of the sensor mounting hole, and an adjustment tool can be inserted into the sensor mounting groove to be inserted into the adjustment slot 302 of the eddy current sensor 1B to adjust the installed sensor.

[0081] Example 6:

[0082] An exemplary embodiment of this application provides a magnetic levitation motor, which includes the sensor fixing assembly in embodiment 5.

[0083] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0084] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0085] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.

Claims

1. A main body for an eddy current sensor, characterized in that, It includes a main body (10), a winding part (20), and an adjustment part (30); The outer circumferential surface of the body (10) is provided with threads; The winding part (20) and the adjustment part (30) are respectively disposed at both ends of the main body (10); the winding part (20) includes a winding body (201), and a winding groove (202) is formed on the outer peripheral surface of the winding body (201). A pin hole (102) is formed on the end face of the main body (10) near the adjustment part (30). An adjustment slot (302) is formed on the adjustment part (30).

2. The eddy current sensor body according to claim 1, characterized in that, At least one first threading channel (203) is formed between the winding groove (202) and the body (10). At least one second threading channel (101) is formed on the body (10); the second threading channel (101) extends toward the adjustment part (30) and passes through the body (10).

3. The eddy current sensor body according to claim 2, characterized in that, The first threading channel (203) extends radially along the winding body (201); the second threading channel (101) is disposed inside the body (10) and extends axially along the body (10); the second threading channel (101) communicates with the first threading channel (203).

4. The eddy current sensor body according to claim 2, characterized in that, The first threading channel (203) is disposed on the outer periphery of the winding body (201) and extends along the axial direction of the winding body (201); the second threading channel (101) is disposed on the outer periphery of the body (10) and extends along the axial direction of the body (10).

5. The eddy current sensor body according to claim 1, characterized in that, The adjustment part (30) includes an adjustment body (301) on which a third threading channel (303) is formed; the third threading channel (303) extends toward the pin hole (102) and passes through the adjustment body (301).

6. The eddy current sensor body according to claim 5, characterized in that, The height of the bottom wall of the third threading channel (303) is lower than the height of the bottom wall of the adjusting slot (302).

7. The eddy current sensor body according to claim 5, characterized in that, The adjustment body (301) is a cylinder, a frustum, a prism, or an elliptical cylinder.

8. The eddy current sensor body according to claim 1, characterized in that, The adjustment slot (302) is a straight slot, a cross-shaped slot, a star-shaped slot, a hexagonal slot, or a cross-shaped slot.

9. The eddy current sensor body according to claim 1, characterized in that, There are two pin holes (102), and the two pin holes (102) are spaced apart.

10. The eddy current sensor body according to claim 1, characterized in that, At least one positioning surface (104) is formed on the outer peripheral surface of the body (10).

11. An eddy current sensor, characterized in that, Includes the eddy current sensor body, wires, and guide as described in any one of claims 1 to 10; The wire is wound in the winding groove (202) of the eddy current sensor body to form a sensor coil; the guide is inserted into the pin hole (102) of the eddy current sensor body; the end of the wire is fixed on the guide.

12. A sensor fixing assembly, characterized in that, It includes the eddy current sensor (1B) as described in claim 11 and a fixing structure (1A); the fixing structure (1A) is annular and has a sensor mounting hole extending radially along the circumferential direction; the eddy current sensor (1B) is installed in the sensor mounting hole.

13. A magnetic levitation motor, characterized in that, Includes the sensor mounting assembly as described in claim 12.

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