Positioning mechanism, stator core defect detection equipment and detection device

Abstract

The utility model relates to a positioning mechanism, stator core defect detection equipment and a detection device. The positioning mechanism comprises a probe support and a pressing mechanism, the probe support is fixed in the detection device, a through hole penetrating through the probe support is formed in the probe support, the lower end of the probe support is provided with a through hole end face, and the through hole is used for containing the probe, so that the detection face of the probe is flush with the hole end face, and the detection face can make contact with and detect the to-be-detected face conveniently. The pressing mechanism is arranged at the upper end part of the probe bracket, and the pressing mechanism is configured to provide pressing force for the probe bracket to move to a to-be-detected surface, so that the hole end surface of the probe bracket and the detection surface of the probe are propped against the to-be-detected surface with certain pressure; the pressing force provided by the pressing mechanism can maintain the stable contact between the detection surface and the surface to be detected, and the detection precision and the detection quality are improved.

Description

Technical Field

[0001] The present application relates to the field of electrical maintenance technology, and in particular to a positioning mechanism, a stator core defect detection device and a detection apparatus. Background Art

[0002] In order to ensure that the generator can maintain a safe working state for a long time, it is necessary to regularly perform defect inspection on the surface to be inspected of the generator. Therefore, it is necessary to first pull the rotor out of the stator, and then install the rotor back into the stator chamber after the defect inspection of the surface to be inspected is completed. During this period, the generator will be difficult to work normally, and the rotor is large in size, usually with a diameter of about 2 meters, a length of about 15.38 meters, and a weight of about 244 tons. It takes a lot of time to pull the rotor out of the stator. Compared with the maintenance work without pulling out the rotor, the maintenance work of pulling out the rotor takes about 5 days longer, and the process of pulling out the rotor requires the removal of a large number of components, resulting in a lot of manpower required for the maintenance work of pulling out the rotor. In addition, since the gap between the stator and the rotor is very small, with the smallest gap being only 58mm, there is a high risk of equipment damage due to collisions during the extraction of the rotor. In order to solve the above problem, a stator core defect inspection robot can be used to inspect the surface of the stator and rotor. However, as the existing inspection robot moves in the gap between the stator and the rotor, it will produce slight displacement, affecting the detection results of the probe. Summary of the invention

[0003] Based on this, it is necessary to provide a positioning mechanism, a stator core defect detection device and a detection apparatus to address the problem that the micro-displacement during the moving process affects the detection results of the probe.

[0004] The present application proposes a positioning mechanism, which comprises:

[0005] A probe bracket, the probe bracket is used to be fixed in the detection device, the probe bracket is provided with a through hole penetrating the probe bracket, the lower end of the probe bracket has a hole end surface of the through hole, the through hole is used to place the probe, so that the detection surface of the probe is flush with the hole end surface;

[0006] A pressing mechanism is arranged at the upper end of the probe bracket, and is configured to provide a pressing force for the probe bracket to move to the surface to be detected.

[0007] In one embodiment, the positioning mechanism also includes a cover plate, which is arranged on a side opposite to the upper end of the probe holder, and the cover plate is used to be arranged on the detection device; the pressing mechanism includes an elastic member, a first blind hole and a second blind hole, the first blind hole is opened at the upper end of the probe holder, the second blind hole is opened on the cover plate, the first blind hole and the second blind hole are arranged opposite to each other, one end of the elastic member abuts against the blind end of the first blind hole, and the other end of the elastic member abuts against the blind end of the second blind hole.

[0008] In one embodiment, a first limiting structure is formed on the side of the probe holder, and the first limiting structure is used to cooperate with the second limiting structure of the detection device to limit the distance that the pressing mechanism presses the probe holder toward the surface to be detected.

[0009] In one embodiment, the first limiting structure has a first step surface, the first step surface is opposite to the surface to be detected, and the first step surface is used to match the second step surface of the second limiting structure, and the second step surface is opposite to the first step surface.

[0010] In one embodiment, the upper end of the probe bracket has a horizontal reference plane, and the hole end surface of the lower end of the probe bracket is inclined to the horizontal reference plane.

[0011] In one of the embodiments, the axial direction of the through hole is perpendicular to the hole end surface.

[0012] In one of the embodiments, a chamfered structure is provided at the connection between the end surface of the hole and the side of the probe holder.

[0013] In one of the embodiments, the probe bracket is provided with a fixing hole, the fixing hole is arranged on the side wall of the through hole and is connected to the through hole, the fixing hole is provided with a connecting piece, and the connecting piece is connected to the probe through the fixing hole.

[0014] The present application also proposes a stator core defect detection device, comprising:

[0015] Probe;

[0016] In the above positioning mechanism, the probe is placed in the through hole.

[0017] The present application also proposes a detection device, comprising:

[0018] device body;

[0019] The above-mentioned stator core defect detection equipment is arranged in the device body.

[0020] In the technical solution of the present application, the positioning mechanism includes a probe holder and a pressing mechanism. The probe holder is fixed in the detection device. The probe holder is provided with a through hole that penetrates the probe holder. The lower end of the probe holder has a through hole end face. The through hole is used to place the probe so that the detection surface of the probe is flush with the hole end face, which is convenient for the detection surface to contact and detect the surface to be detected. The pressing mechanism is arranged at the upper end of the probe holder. The pressing mechanism is configured to provide a pressing force for the probe holder to move to the surface to be detected, ensuring that the hole end face of the probe holder and the detection surface of the probe are in contact with the surface to be detected with a certain pressure. During the movement of the detection device, the pressing force provided by the pressing mechanism can maintain the stable contact between the detection surface and the surface to be detected, thereby improving the detection accuracy and detection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a first-perspective structural schematic diagram of the positioning mechanism, stator core defect detection equipment and positioning mechanism of the detection device of the present application.

[0022] Figure 2 This is a second perspective structural schematic diagram of the positioning mechanism, stator core defect detection equipment and positioning mechanism of the detection device of the present application.

[0023] Figure 3 This is a third-view structural diagram of the positioning mechanism, stator core defect detection equipment and positioning mechanism of the detection device of the present application.

[0024] Figure 4 This is a front structural schematic diagram of the positioning mechanism, stator core defect detection equipment and the positioning mechanism of the detection device of the present application.

[0025] Figure 5 It is a schematic diagram of the rear view structure of the positioning mechanism, stator core defect detection equipment and the positioning mechanism of the detection device of the present application.

[0026] Figure 6 for Figure 5 Schematic diagram of the structure of the AA section.

[0027] Figure 7 This is a left-side structural schematic diagram of the positioning mechanism, stator core defect detection equipment and positioning mechanism of the detection device of the present application.

[0028] Figure 8 It is a right view structural schematic diagram of the positioning mechanism, stator core defect detection equipment and positioning mechanism of the detection device of the present application.

[0029] Fig. 9 It is a schematic diagram of the top view structure of the positioning mechanism, stator core defect detection equipment and the positioning mechanism of the detection device of the present application.

[0030] Fig.10This is a schematic diagram of the bottom-up structure of the positioning mechanism, stator core defect detection equipment and the positioning mechanism of the detection device of the present application.

[0031] Fig.11 This is a schematic diagram of the top view installation structure of the positioning mechanism, stator core defect detection equipment and the stator core defect detection equipment of the detection device in the detection device of the present application.

[0032] Fig.12 This is a schematic diagram of the upward installation structure of the positioning mechanism, stator core defect detection equipment and the stator core defect detection equipment of the detection device in the detection device of the present application.

[0033] Fig.13 This is a schematic diagram of the installation structure of the positioning mechanism, the stator core defect detection device and the stator core defect detection device of the detection device inside the detection device of the present application.

[0034] Fig.14 This is a schematic diagram of the positioning mechanism, stator core defect detection equipment and the detection device of the present application moving inside the gap between the stator and the rotor.

[0035] Description of component numbers in the attached figure:

[0036] 1000, positioning mechanism; 2000, detection device; 500, cover plate; 600, mounting groove; 1001, stator; 1002, rotor; 100, probe bracket; 110, through hole; 111, hole end face; 120, fixing hole; 200, pressing mechanism; 210, elastic member; 220, first blind hole; 230, second blind hole; 300, limiting mechanism; 310, first limiting step; 400, chamfering structure. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0043] See also Figures 1 to 14 , Figures 1 to 10 A structural schematic diagram of the positioning mechanism 1000 is shown. Figures 11 to 13 A schematic diagram of the installation structure of the positioning mechanism 1000 inside the detection device 2000 is shown. Fig.14 The schematic diagram shows the moving process of the detection device 2000 in the gap between the stator 1001 and the rotor 1002. The present application proposes a positioning mechanism 1000, which includes a probe holder 100 and a pressing mechanism 200. The probe holder 100 is fixed in the detection device 2000. The probe holder 100 is provided with a through hole 110 penetrating the probe holder 100. The lower end of the probe holder 100 has a hole end surface 111 of the through hole 110. The through hole 110 is used to place the probe so that the detection surface of the probe is flush with the hole end surface 111, which is convenient for the detection surface to contact and detect the surface to be detected. The pressing mechanism 200 is disposed at the upper end of the probe holder 100. The pressing mechanism 200 is configured to provide a pressing force for the probe holder 100 to move to the surface to be detected, ensuring that the hole end surface 111 of the probe holder 100 and the detection surface of the probe are in contact with the surface to be detected with a certain pressure. During the movement of the detection device 2000, the pressing force provided by the pressing mechanism 200 can maintain stable contact between the detection surface and the surface to be detected, thereby improving the detection accuracy and detection quality.

[0044] The positioning mechanism 1000 is arranged on the detection device 2000 through the probe holder 100 to position the detection surface of the probe. The detection device 2000 has a moving function to carry the positioning mechanism 1000 and the probe to move on the surface to be detected. The detection device 2000 is determined according to the actual application and is not specifically limited here. Exemplarily, the detection device 2000 is a crawler-type moving robot. The probe positioned by the positioning mechanism 1000 can be used to detect the surface to be detected of other devices with a planar structure, such as the surface of the stator 1001 or the surface of the rotor 1002, which is not specifically limited here. Exemplarily, the probe positioned by the positioning mechanism 1000 is used to detect the surface of the stator 1001, and the surface of the stator 1001 is provided with an iron core, and the probe can detect defects on the surface of the iron core.

[0045] See also Figure 1 and Fig.11The positioning mechanism 1000 further includes a cover plate 500, which is disposed on a side opposite to the upper end of the probe holder 100, and is used to be disposed on the detection device 2000. The pressing mechanism 200 includes an elastic member 210, a first blind hole 220, and a second blind hole 230. The first blind hole 220 is provided at the upper end of the probe holder 100, and the second blind hole 230 is provided on the cover plate 500. The first blind hole 220 and the second blind hole 230 are disposed opposite to each other, and one end of the elastic member 210 abuts against the blind end of the first blind hole 220, and the other end of the elastic member 210 abuts against the blind end of the second blind hole 230. Exemplarily, the elastic member 210 is a spring member. When the cover plate 500 is fixedly arranged on the upper end of the probe holder 100, the elastic member 210 is arranged between the first blind hole 220 and the second blind hole 230 and is in a reset state to provide an elastic pressing force for pressing the probe holder 100 toward the surface to be detected. When the detection device 2000 undergoes a micro-displacement during the movement, the elastic member 210 can provide a pressing effect on the probe holder 100, so that the detection surface of the probe can always maintain a stable contact with the surface to be detected.

[0046] See also Figures 6 to 8 as well as Fig.13 , a first limiting structure 310 is formed on the side of the probe holder 100, and the first limiting structure 310 is used to cooperate with the second limiting structure of the detection device 2000 to limit the distance that the pressing mechanism 200 presses the probe holder 100 toward the surface to be detected. Specifically, the detection device 2000 includes a mounting groove 600, the positioning mechanism 1000 is placed in the mounting groove 600, the probe holder 100 can move along the axial direction of the through hole 110 in the mounting groove 600, and a second limiting structure is formed on the groove wall of the mounting groove 600. The first limiting structure 310 and the second limiting structure cooperate with each other to limit the displacement distance generated by the pressing mechanism 200 pressing the probe holder 100, and prevent the pressing mechanism 200 from pushing the probe holder 100 out of the mounting groove 600.

[0047] Specifically, the first limiting structure 310 has a first step surface, the first step surface is opposite to the surface to be detected, and the first step surface is used to match the second step surface of the second limiting structure, and the second step surface is opposite to the first step surface.

[0048] Further, see Figure 5 and Figure 6 The upper end of the probe bracket 100 has a horizontal reference plane, and the hole end surface 111 at the lower end of the probe bracket 100 is inclined to the horizontal reference plane. In this way, the inclined hole end surface 111 can better fit the surface to be detected that is inclined to the horizontal reference plane, thereby improving the detection accuracy.

[0049] Specifically, when the surface to be inspected is the surface of the stator 1001, the surface of the stator 1001 includes a plurality of adjacently arranged core slats, and the side edges on both sides of the core slats are arranged axially along the central axis of the stator 1001. The plane formed by the two non-connected side edges between two adjacent core slats is parallel to the horizontal reference plane, and the angle between the core slats and the horizontal reference plane is the first angle. The angle between the hole end face 111 and the horizontal reference plane is equal to the angle of the first angle. Such an arrangement helps to improve the fit between the hole end face 111 and the surface of the stator 1001.

[0050] The axial direction of the through hole 110 is perpendicular to the hole end surface 111 , so as to ensure that when the probe is placed in the through hole 110 , the detection surface of the probe can be flush with the hole end surface 111 of the through hole 110 .

[0051] Optionally, see Figures 1 to 3 A chamfered structure 400 is provided at the connection between the hole end surface 111 and the side of the probe holder 100. The chamfered structure 400 can prevent the probe holder 100 from getting stuck on the surface to be detected when moving.

[0052] Specifically, see Figures 1 to 6 The probe bracket 100 is provided with a fixing hole 120, which is arranged on the side wall of the through hole 110 and connected to the through hole 110. The fixing hole 120 is provided with a connecting piece, which is connected to the probe through the fixing hole 120 to fix the probe in the through hole 110 to ensure that the hole end surface 111 is flush with the detection surface.

[0053] The present application also proposes a stator 1001 core defect detection device, including a probe and the above-mentioned positioning mechanism 1000 , and the probe is placed in the through hole 110 .

[0054] The present application also proposes a detection device 2000, comprising a device body and the above-mentioned stator 1001 core defect detection device, wherein the stator 1001 core defect detection device is arranged in the device body. The detection device 2000 has a traveling function, so as to carry the stator 1001 core defect detection device and travel on the surface to be detected. Exemplarily, the detection device 2000 is a crawler traveling robot.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A positioning mechanism, characterized in that: The positioning mechanism comprises: A probe bracket, the probe bracket is used to be fixed in the detection device, the probe bracket is provided with a through hole penetrating the probe bracket, the lower end of the probe bracket has a hole end surface of the through hole, the through hole is used to place the probe, so that the detection surface of the probe is flush with the hole end surface; A pressing mechanism is arranged at the upper end of the probe bracket, and is configured to provide a pressing force for the probe bracket to move to the surface to be detected.

2. The positioning mechanism according to claim 1, characterized in that: The positioning mechanism also includes a cover plate, which is arranged on a side opposite to the upper end of the probe holder, and the cover plate is used to be arranged on the detection device; the pressing mechanism includes an elastic member, a first blind hole and a second blind hole, the first blind hole is opened at the upper end of the probe holder, the second blind hole is opened on the cover plate, the first blind hole and the second blind hole are arranged opposite to each other, one end of the elastic member abuts against the blind end of the first blind hole, and the other end of the elastic member abuts against the blind end of the second blind hole.

3. The positioning mechanism according to claim 1, characterized in that: A first limiting structure is formed on the side surface of the probe bracket, and the first limiting structure is used to cooperate with the second limiting structure of the detection device to limit the distance that the pressing mechanism presses the probe bracket toward the surface to be detected.

4. The positioning mechanism according to claim 3, characterized in that: The first limiting structure has a first step surface, the first step surface is opposite to the surface to be detected, and the first step surface is used to match the second step surface of the second limiting structure, and the second step surface is opposite to the first step surface.

5. The positioning mechanism according to claim 1, characterized in that: The upper end of the probe bracket has a horizontal reference plane, and the hole end surface of the lower end of the probe bracket is inclined to the horizontal reference plane.

6. The positioning mechanism according to claim 1, characterized in that: The axial direction of the through hole is perpendicular to the hole end surface.

7. The positioning mechanism according to claim 1, characterized in that: A chamfered structure is provided at a connection between the hole end surface and the side portion of the probe bracket.

8. The positioning mechanism according to claim 1, characterized in that: The probe bracket is provided with a fixing hole, the fixing hole is arranged on the side wall of the through hole and is connected to the through hole, the fixing hole is provided with a connecting piece, and the connecting piece is connected to the probe through the fixing hole.

9. A stator core defect detection device, characterized in that: include: Probe; According to the positioning mechanism as described in any one of claims 1 to 8, the probe is placed in the through hole.

10. A detection device, characterized in that: include: device body; The stator core defect detection device according to claim 9, wherein the stator core defect detection device is arranged in the device body.

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