Distance measurement auxiliary tool

Abstract

The utility model belongs to the technical field of gap measurement, and particularly relates to a distance measurement auxiliary tool which is used for measuring the installation distance between a rotating speed probe and the tooth top face of a gear tooth of a rotor. The distance measurement auxiliary tool comprises a base body and an insertion part, wherein the insertion part is connected with the base body; the insertion part is provided with a first arc cylindrical surface; the first arc cylindrical surface and the tooth top surface are located in the same cylindrical surface under the condition that the insertion part is inserted into the gear groove of the rotor, and the first arc cylindrical surface of the insertion part and the tooth top surface are located in the same cylindrical surface, so that the distance between the first arc cylindrical surface and the rotating speed probe can be directly measured; the mounting distance between the rotating speed probe and the tooth top surface can be obtained without starting an oil jacking device, so that the dismounting time of the rotating speed probe is shortened, and the dismounting efficiency of the rotating speed probe is improved; in addition, the rotor does not need to be rotated, the risks of steam turbine damage and personnel injury are reduced, and the safety of rotating speed probe disassembly and assembly is improved.

Description

Technical Field

[0001] This application belongs to the field of gap measurement technology, and in particular relates to a distance measurement auxiliary tool. Background Technology

[0002] Steam turbines are crucial components of nuclear power generator sets, and the rotor speed within them directly impacts the safe and stable operation of the generator set. To accurately measure the rotor speed signal, a speed probe is typically installed on the outside of the rotor to obtain its speed information. To ensure the reliability of the speed signal measurement, the speed probe needs to be disassembled, tested for performance, or have its clearance adjusted during generator set shutdown maintenance. The installation distance between the speed probe and the rotor's tooth tip surface is critical; an inappropriate installation distance can lead to abnormal speed measurement signals. Therefore, the installation distance must be checked during the disassembly and assembly of the speed probe. However, in practice, checking and measuring the installation distance is complex and time-consuming, extending the disassembly and assembly time of the speed probe and hindering maintenance efficiency.

[0003] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0004] The purpose of this application is to provide a distance measurement auxiliary tool that can improve the efficiency of disassembling and assembling a rotation speed probe.

[0005] To achieve the above objectives, the technical solution adopted in this application is: a distance measurement auxiliary tool for measuring the installation distance between the speed probe and the tooth tip surface of the rotor; the distance measurement auxiliary tool includes a base and an insertion part, the insertion part being connected to the base; the insertion part has a first arc cylindrical surface; the first arc cylindrical surface is used to be located in the same cylindrical surface as the tooth tip surface when the insertion part is inserted into the gear groove of the rotor.

[0006] Optionally, the insertion part has a second arcuate cylindrical surface, the first arcuate cylindrical surface and the second arcuate cylindrical surface are arranged opposite each other radially along the first arcuate cylindrical surface, and the second arcuate cylindrical surface is used to abut against the bottom surface of the gear groove.

[0007] Optionally, the insertion part further has a first connecting surface and a second connecting surface that are circumferentially distributed along the first arc cylindrical surface. The first connecting surface and the second connecting surface are connected between the first arc cylindrical surface and the second arc cylindrical surface. The first connecting surface and the second connecting surface are respectively used to abut against the two sidewall surfaces of the gear groove.

[0008] Optionally, the base and the insert are arranged along the axial direction of the first arcuate cylindrical surface.

[0009] Optionally, the substrate has a third arcuate cylindrical surface, the third arcuate cylindrical surface and the first arcuate cylindrical surface are located on the same side of the distance measuring auxiliary tool along the radial direction of the first arcuate cylindrical surface, and the third arcuate cylindrical surface and the first arcuate cylindrical surface are located within the same cylindrical surface.

[0010] Optionally, the substrate has a fourth circular arc cylindrical surface, and the third and fourth circular arc cylindrical surfaces are arranged radially opposite to each other along the first circular arc cylindrical surface.

[0011] Optionally, the distance between the third and fourth circular arc cylindrical surfaces is greater than the distance between the first and second circular arc cylindrical surfaces.

[0012] Optionally, the base has a first end face along the axial direction of the first arcuate cylindrical surface, and the insertion part is connected to the first end face. The first end face is used to abut against the end face of the gear tooth along the axial direction of the rotor.

[0013] Optionally, there are multiple insertion parts, which are spaced apart circumferentially along the first arc cylindrical surface, so that the multiple insertion parts can be inserted into multiple gear teeth respectively.

[0014] Optionally, the distance measurement aid is an aluminum alloy tool.

[0015] The distance measurement auxiliary tool provided in this application has at least one of the following technical effects: When used when the speed probe is aligned with the gear slot, personnel or equipment grasp the base and insert the insertion part into the gear slot. The first arc cylindrical surface of the insertion part and the tooth tip surface are located in the same cylindrical surface. In this way, the distance between the first arc cylindrical surface and the speed probe can be directly measured, and the installation distance between the speed probe and the tooth tip surface can be obtained. There is no need to start the oil jacking device, which reduces the disassembly and assembly time of the speed probe and improves the disassembly and assembly efficiency of the speed probe. In addition, there is no need to rotate the rotor, which reduces the risk of turbine damage and personnel injury and improves the safety of speed probe disassembly and assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a distance measurement auxiliary tool provided in some embodiments of this application when measuring installation distance.

[0018] Figure 2 for Figure 1 Schematic diagram of the distance measurement aid shown Figure 1 .

[0019] Figure 3 for Figure 1 Schematic diagram of the distance measurement aid shown Figure 2 .

[0020] Figure 4 For along Figure 3 Sectional view along line AA in the middle.

[0021] The following are the labeling elements in the figure:

[0022] 100. Distance measurement auxiliary tool; 10. Base; 11. Third arc cylindrical surface; 12. Fourth arc cylindrical surface; 13. First end face; 20. Insertion part; 21. First arc cylindrical surface; 22. Second arc cylindrical surface; 23. First connecting surface; 24. Second connecting surface; 200. Rotation speed probe; 300. Rotor; 310. Gear teeth; 311. Tooth tip surface; 320. Gear groove; 400. Installation distance. Detailed Implementation

[0023] 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.

[0024] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0025] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0030] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0031] The steam turbine is a crucial component of a nuclear power generator set, and the rotor speed within it directly impacts the safe and stable operation of the generator set. To accurately measure the rotor speed signal, a speed probe is typically installed on the outside of the rotor to obtain its speed information. To ensure the reliability of the speed signal measurement, the speed probe must be disassembled, tested for performance, or have its clearance adjusted during generator set shutdown maintenance. The installation distance between the speed probe and the tooth tip of the rotor is critical; an inappropriate installation distance can lead to abnormal speed measurement signals. Therefore, the installation distance must be checked during the disassembly and assembly of the speed probe.

[0032] During the disassembly and assembly of the speed probe, the jacking oil device is activated to lift the rotor. Then, the rotor is rotated so that the tooth tips of the rotor align with the speed probe, thereby measuring the distance between the tooth tips and the speed probe. Based on historical maintenance experience, removing the speed probe requires 2 hours of jacking oil operation, and reinstalling it requires 8 hours, necessitating multiple rotor rotations. This significantly impacts the critical path of the conventional island, making the disassembly and assembly of the speed probe complex and time-consuming, thus hindering maintenance efficiency. Furthermore, multiple rotor rotations increase the risk of turbine damage and personnel injury. In particular, when multiple speed probes are mounted on the rotor, the number of rotor rotations is even greater, further increasing the risk of turbine damage and personnel injury.

[0033] Based on this, this application provides a distance measurement auxiliary tool. The insertion part of the tool can be inserted into the gear slot of the rotor, and the first arc cylindrical surface of the insertion part and the tooth tip surface of the rotor are located in the same cylindrical surface. In this way, when the speed probe is aligned with the gear slot, the distance between the first arc cylindrical surface and the speed probe can be directly measured, and the installation distance between the speed probe and the tooth tip surface can be obtained. There is no need to start the oil jacking device, which reduces the time for disassembling and assembling the speed probe and improves the efficiency of disassembling and assembling the speed probe. In addition, there is no need to rotate the rotor, which reduces the risk of turbine damage and personnel injury and improves the safety of disassembling and assembling the speed probe.

[0034] The distance measurement auxiliary tool of this application embodiment can be applied to steam turbines, and can also be applied to other equipment that needs to measure the installation distance between the tooth tip surface of the rotor and the speed probe.

[0035] The following combination Figures 1-4 This application describes a distance measurement auxiliary tool 100 according to an embodiment of the present application.

[0036] See Figure 1 and Figure 2 As shown, in some embodiments, the distance measurement auxiliary tool 100 is used to measure the installation distance 400 between the speed probe 200 and the tooth tip surface 311 of the gear teeth 310 of the rotor 300; the distance measurement auxiliary tool 100 includes a base 10 and an insertion part 20; the insertion part 20 is connected to the base 10; the insertion part 20 has a first arcuate cylindrical surface 21; the first arcuate cylindrical surface 21 is arranged to be located in the same cylindrical surface as the tooth tip surface 311 when the insertion part 20 is inserted into the gear groove 320 of the rotor 300.

[0037] The speed probe 200 can refer to a component used to measure the rotational speed of the rotor 300. The speed probe 200 can be a speed probe 200 that uses eddy current or Hall effect. Of course, it can also be other types of speed probe 200.

[0038] The rotor 300 adopts a gear structure. Multiple gear teeth 310 are provided on the outer periphery of the rotor 300. The surface of the gear teeth 310 away from the axis of the rotor is the tooth tip surface 311. The gap between two adjacent gear teeth 310 forms a gear groove 320.

[0039] The base 10 refers to the part of the distance measurement auxiliary tool 100 used by personnel or equipment to insert the insertion part 20 into the gear groove 320. The base 10 serves to support the insertion part 20, and the material of the base 10 can be various, such as metal or plastic. The base 10 is designed for personnel or equipment to hold, making it convenient to insert the insertion part 20 into the gear groove 320, thus facilitating the use of the distance measurement auxiliary tool 100.

[0040] The insertion part 20 can refer to the portion of the distance measuring auxiliary tool 100 used for insertion into the gear groove 320. The insertion part 20 has a first arcuate cylindrical surface 21, which can refer to the outer surface of the insertion part 20. After the insertion part 20 is inserted into the gear groove 320, the first arcuate cylindrical surface 21 and the tooth tip surface 311 of the gear tooth 310 are located on the same cylindrical surface, that is, the first arcuate cylindrical surface 21 and the tooth tip surface 311 are coaxially arranged and have the same radius. The first arcuate cylindrical surface 21 is a cylindrical surface formed by a portion of a circle.

[0041] The base 10 and the insert 20 can be molded separately and then assembled together, or the base 10 and the insert 20 can be made by an integral molding process such as integral injection molding or integral cutting.

[0042] The distance measurement auxiliary tool 100 of this application embodiment is used when the speed probe 200 is aligned with the gear groove 320. Personnel or equipment grasp the base 10 and insert the insertion part 20 into the gear groove 320. The first arc cylindrical surface 21 of the insertion part 20 and the tooth tip surface 311 are located in the same cylindrical surface. In this way, the distance between the first arc cylindrical surface 21 and the speed probe 200 can be directly measured, and the installation distance 400 between the speed probe 200 and the tooth tip surface 311 can be obtained. There is no need to start the oil jacking device, which reduces the time for disassembling and assembling the speed probe 200 and improves the efficiency of disassembling and assembling the speed probe 200. In addition, there is no need to rotate the rotor 300, which reduces the risk of turbine damage and personnel injury and improves the safety of disassembling and assembling the speed probe 200.

[0043] In some embodiments, the speed probe 200 is mounted on a bracket inside the turbine bearing housing. The mounting position is close to the rear oil baffle and bearing pad, and space is limited. The mounting distance between the speed probe 200 and the tooth tip surface 311 is required to be within the range of 1.4 ± 0.2 mm, and the positioning accuracy of the speed probe 200 is required to be high.

[0044] In some embodiments, the insertion portion 20 has a second arcuate cylindrical surface 22, the first arcuate cylindrical surface 21 and the second arcuate cylindrical surface 22 are arranged opposite to each other along the radial direction of the first arcuate cylindrical surface 21, and the second arcuate cylindrical surface 22 is used to abut against the bottom surface of the gear groove 320.

[0045] The insertion part 20 has an arc-shaped structure. The outer surface of the insertion part 20 is a first arc-shaped cylindrical surface 21, and the inner surface of the insertion part 20 is a second arc-shaped cylindrical surface 22. After the insertion part 20 is inserted into the gear groove 320, the second arc-shaped cylindrical surface 22 is positioned opposite to and abuts against the bottom surface of the gear groove 320. The second arc-shaped cylindrical surface 22 can be a cylindrical surface formed by a partial section of a circle.

[0046] In some examples, the bottom surface of the gear groove 320 has the same shape as the second arc cylindrical surface 22, and the bottom surface of the gear groove 320 can completely fit with the second arc cylindrical surface 22. Of course, in other examples, the second arc cylindrical surface 22 can also fit a part of the bottom surface of the gear groove 320.

[0047] By adopting the technical solution of this embodiment, the second arc cylindrical surface 22 abuts against the bottom surface of the gear groove 320. The bottom surface of the gear groove 320 can position the second arc cylindrical surface 22. Under this positioning effect, the insertion part 20 is inserted into the gear groove 320, and the first arc cylindrical surface 21 can automatically be located in the same cylindrical surface as the tooth tip surface 311. This reduces the number of adjustments required for the insertion part 20, simplifies the insertion operation of the insertion part 20, improves the disassembly and assembly efficiency of the speed probe 200, and also improves the accuracy of the installation distance 400 measurement, further improving the disassembly and assembly efficiency of the speed probe 200.

[0048] In some embodiments, the insertion portion 20 further has a first connecting surface 23 and a second connecting surface 24 that are circumferentially distributed along the first arc cylindrical surface 21. The first connecting surface 23 and the second connecting surface 24 are connected between the first arc cylindrical surface 21 and the second arc cylindrical surface 22. The first connecting surface 23 and the second connecting surface 24 are respectively used to abut against the two sidewall surfaces of the gear groove 320.

[0049] The insertion part 20 has two surfaces that are distributed circumferentially opposite each other along the first arc cylindrical surface 21, which are divided into a first connecting surface 23 and a second connecting surface 24.

[0050] In some examples, the first connecting surface 23 has the same shape as the groove sidewall of the corresponding gear groove 320, and the groove sidewall of the gear groove 320 can fit completely with the first connecting surface 23. Of course, in other examples, the first connecting surface 23 can also fit a part of the groove sidewall of the gear groove 320.

[0051] In some examples, the second connecting surface 24 has the same shape as the groove sidewall of the corresponding gear groove 320, and the groove sidewall of the gear groove 320 can be completely fitted with the second connecting surface 24. Of course, in other examples, the second connecting surface 24 can also fit a portion of the groove sidewall of the gear groove 320.

[0052] By adopting the technical solution of this embodiment, the first connecting surface 23 and the second connecting surface 24 abut against the two side walls of the gear groove 320, and the second arc cylindrical surface 22 abuts against the bottom surface of the gear groove 320. This can fix the insertion part 20 in the gear groove 320, reduce the measurement error caused by the movement of the insertion part 20 in the gear groove 320, improve the accuracy of the installation distance 400 measurement, reduce the number of adjustments of the speed probe 200, and further improve the disassembly and assembly efficiency of the speed probe 200.

[0053] In some embodiments, the base 10 and the insertion portion 20 are arranged along the axial direction of the first arcuate cylindrical surface 21.

[0054] In some examples, the insertion part 20 can be inserted between the speed probe 200 and the tooth tip surface 311 first, and then inserted into the gear groove 320 radially along the rotor 300. However, the installation distance 400 (e.g., 1.4 ± 0.2 mm) between the speed probe 200 and the tooth tip surface 311 is small, making it difficult to insert the insertion part 20 between the speed probe 200 and the tooth tip surface 311, which can easily cause damage to the gear teeth 310 or the speed probe 200. In contrast, the distance measurement auxiliary tool 100 of this application embodiment has the base 10 and the insertion part 20 distributed along the axial direction of the first arc cylindrical surface 21, so that the insertion part 20 can be directly inserted into the gear groove 320 along the axial direction of the rotor 300. The insertion part 20 does not need to be inserted between the speed probe 200 and the tooth tip surface 311, which reduces the difficulty of inserting the insertion part 20 into the gear groove 320 and reduces the risk of damage to the gear teeth 310 or the speed probe 200.

[0055] In some embodiments, the base 10 has a third arcuate cylindrical surface 11, the third arcuate cylindrical surface 11 and the first arcuate cylindrical surface 21 are located on the same side of the distance measuring auxiliary tool 100 along the radial direction of the first arcuate cylindrical surface 21, and the third arcuate cylindrical surface 11 and the first arcuate cylindrical surface 21 are located within the same cylindrical surface.

[0056] The outer radial surface of the base 10 along the first arc cylindrical surface 21 is the third arc cylindrical surface 11. The third arc cylindrical surface 11 and the first arc cylindrical surface 21 are located within the same cylindrical surface, so that the third arc cylindrical surface 11, the first arc cylindrical surface 21, and the tooth tip surface 311 are all located within the same cylindrical surface. This ensures that the base 10 does not obstruct the first arc cylindrical surface 21, allowing personnel to easily measure the installation distance 400, thus improving the accuracy of the installation distance 400 measurement. The third arc cylindrical surface 11 can be a cylindrical surface formed by a partial segment of a circle or a cylindrical surface formed by the entire circle.

[0057] In some embodiments, the substrate 10 has a fourth arcuate cylindrical surface 12, and the third arcuate cylindrical surface 11 and the fourth arcuate cylindrical surface 12 are arranged radially opposite to each other along the first arcuate cylindrical surface 21.

[0058] The substrate 10 has an arc structure. The inner surface of the substrate 10 is a fourth arc cylindrical surface 12, and the outer surface of the substrate 10 is a third arc cylindrical surface 11. The fourth arc cylindrical surface 12 can be a cylindrical surface formed by a partial section of the circle, or it can be a cylindrical surface formed by the entire circle.

[0059] By adopting the technical solution of this embodiment, the base 10 and the insertion part 20 have the same shape, which is convenient for processing and manufacturing; in addition, the second arc cylindrical surface 22 can also be adapted to the shape of the rotor 300, reducing the risk of interference between the base 10 and the rotor 300.

[0060] In some embodiments, the distance H1 between the third arc cylindrical surface 11 and the fourth arc cylindrical surface 12 is greater than the distance H2 between the first arc cylindrical surface 21 and the second arc cylindrical surface 22.

[0061] The distance H1 between the third arc cylindrical surface 11 and the fourth arc cylindrical surface 12 can refer to the thickness of the base 10, and the distance H2 between the first arc cylindrical surface 21 and the second arc cylindrical surface 22 can refer to the thickness of the insertion part 20.

[0062] By adopting the technical solution of this embodiment, the base 10 is large in size and can provide stable support for the insertion part 20, which is beneficial to improving the structural strength of the distance measurement auxiliary tool 100.

[0063] In some embodiments, the base 10 has a first end face 13 along the axial direction of the first arcuate cylindrical surface 21, and the insertion portion 20 is connected to the first end face 13. The first end face 13 is used to abut against the end face of the gear tooth 310 along the axial direction of the rotor 300.

[0064] The base 10 and the insertion part 20 are distributed along the axial direction of the first arc cylindrical surface 21. The first end face 13 can refer to one of the two end faces of the base 10 that are distributed opposite each other along the axial direction of the first arc cylindrical surface 21. A part of the first end face 13 is connected to the insertion part 20, and another part of the first end face 13 abuts against the end face of the gear tooth 310 along the axial direction of the rotor 300.

[0065] By adopting the technical solution of this embodiment, the insertion part 20 is inserted into the gear groove 320 along the axial direction of the rotor 300. The first end face 13 abuts against the end face of the gear tooth 310 along the axial direction of the rotor 300, which can limit the depth of the insertion part 20 into the gear groove 320, reduce the risk of damage to other components due to the insertion part 20 being inserted into the gear groove 320 too deeply, and also reduce the risk that the speed probe 200 cannot be aligned with the first arc cylindrical surface 21 due to the insertion part 20 being inserted into the gear groove 320 too shallowly.

[0066] In some embodiments, the number of insertion portions 20 is multiple, and the multiple insertion portions 20 are arranged circumferentially along the first arc cylindrical surface 21 so that the multiple insertion portions 20 can be inserted into the multiple gear teeth 310 respectively.

[0067] In some cases, multiple speed probes 200 are usually provided on the outer periphery of the rotor 300, and multiple insertion parts 20 can be inserted into multiple gear slots 320. This can simultaneously meet the measurement requirements of the installation distance 400 of multiple speed probes 200, which is beneficial to improving maintenance efficiency.

[0068] The specific number of insertion parts 20 can be designed according to the actual situation and is not limited here.

[0069] In some embodiments, the distance measurement aid 100 is an aluminum alloy tool.

[0070] The distance measurement auxiliary tool 100 is made of aluminum alloy. It is understood that both the insertion part 20 and the base 10 are made of aluminum alloy.

[0071] By adopting the technical solution of this embodiment, the aluminum alloy has good structural strength and is not easily damaged, which can improve the service life of the distance measurement auxiliary tool 100.

[0072] The distance measurement auxiliary tool 100 of this application embodiment can measure the installation distance 400 between each speed probe 200 and the tooth tip surface 311 of the gear tooth 310 without activating the top shaft device. This reduces the time spent repeatedly adjusting the speed probe 200 with a wrench, and ensures that the speed output of the rotor 300 is normal after the speed probe 200 is reinstalled. This can save the critical path time of the host and reduce the risk of equipment damage and personnel injury caused by the rotation of the rotor 300.

[0073] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A distance measurement auxiliary tool for measuring the installation distance between the top surfaces of the teeth of a rotation speed probe and a rotor; characterized in that: The distance measurement aid includes: Matrix; An insertion portion is connected to the base; the insertion portion has a first arcuate cylindrical surface; the first arcuate cylindrical surface is configured to be located on the same cylindrical surface as the tooth tip surface when the insertion portion is inserted into the gear slot of the rotor.

2. The distance measurement auxiliary tool according to claim 1, characterized in that: The insertion part has a second arcuate cylindrical surface, and the first arcuate cylindrical surface and the second arcuate cylindrical surface are arranged opposite each other radially along the first arcuate cylindrical surface. The second arcuate cylindrical surface is used to abut against the bottom surface of the gear groove.

3. The distance measurement auxiliary tool according to claim 2, characterized in that: The insertion part also has a first connecting surface and a second connecting surface that are circumferentially distributed along the first arc cylindrical surface. The first connecting surface and the second connecting surface are connected between the first arc cylindrical surface and the second arc cylindrical surface. The first connecting surface and the second connecting surface are respectively used to abut against the two sidewall surfaces of the gear groove.

4. The distance measurement auxiliary tool according to claim 2, characterized in that: The base and the insertion part are arranged along the axial direction of the first arc cylindrical surface.

5. The distance measurement auxiliary tool according to claim 4, characterized in that: The base has a third arc-shaped cylindrical surface, which is located on the same side of the distance measuring auxiliary tool along the radial direction of the first arc-shaped cylindrical surface, and the third arc-shaped cylindrical surface and the first arc-shaped cylindrical surface are located within the same cylindrical surface.

6. The distance measurement auxiliary tool according to claim 5, characterized in that: The substrate has a fourth arcuate cylindrical surface, and the third and fourth arcuate cylindrical surfaces are arranged radially opposite to each other along the first arcuate cylindrical surface.

7. The distance measurement auxiliary tool according to claim 6, characterized in that: The distance between the third and fourth arcuate cylindrical surfaces is greater than the distance between the first and second arcuate cylindrical surfaces.

8. The distance measurement auxiliary tool according to claim 4, characterized in that: The base has a first end face along the axial direction of the first arcuate cylindrical surface, the insertion part is connected to the first end face, and the first end face is used to abut against the end face of the gear tooth along the axial direction of the rotor.

9. The distance measurement auxiliary tool according to any one of claims 1 to 8, characterized in that: The number of the insertion parts is multiple, and the multiple insertion parts are arranged circumferentially along the first arc cylindrical surface so that the multiple insertion parts can be inserted into the multiple gear slots respectively.

10. The distance measurement auxiliary tool according to any one of claims 1 to 8, characterized in that: The distance measurement auxiliary tool is an aluminum alloy tool.

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