Large hydroelectric generating set sensor position positioning device and use method thereof

Abstract

The invention discloses a large hydroelectric generating set sensor position positioning device and a use method thereof, one end of a center hole of a positioning sleeve is provided with a first chamber, and the positioning sleeve is provided with a third chamber on the outer side of the first chamber; one end of the first linkage module is rotationally connected with the first cavity in a positioning mode, a spiral part is arranged on the outer circumferential wall of the first linkage module, and a first gear ring is arranged at the end, located in the first cavity, of the first linkage module; one end of the second linkage module elastically stretches out and draws back and is rotatably connected with the third cavity, and a second gear ring meshed with the first gear ring is arranged at the end, located in the third cavity, of the second linkage module; a linkage cavity is formed in one end of a center hole of the positioning seat, a spiral ring is arranged on the inner wall of the linkage cavity, and a positioning cavity is formed in the positioning seat and located on the outer side of the linkage cavity. The limiting mechanism is used for locking the second linkage module so as to limit rotation of the second linkage module. The problems that a traditional sensor is tedious in installation mode and prone to loosening after being installed are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor installation for hydraulic generating units, and particularly to a position positioning device and a detection method for sensors of large hydraulic generating units. Background Art

[0002] A position positioning device for a speed sensor of a large hydraulic generating unit is a device specifically designed to fix the position of the speed sensor, which ensures that the sensor can accurately measure the speed of the generating unit and transmit the signal to the monitoring system for real-time monitoring and control.

[0003] However, when the speed sensor is positioned and installed, the common method is the cooperation between a nut and a thread. The installation is cumbersome. And after the speed sensor is positioned and installed at a specified position, due to the fact that the thread and the nut are prone to rust after cooperation under the influence of the environment, it affects subsequent maintenance. Moreover, when the large hydraulic generating unit is in motion, it will vibrate, and the nut will become loose, resulting in the position deviation of the speed sensor and affecting the accuracy of the final detection result. In view of this, a position positioning device for a speed sensor of a large hydraulic generating unit is proposed. Summary of the Invention

[0004] To solve the existing technical problems, the main purpose of the present invention is to provide a position positioning device and a usage method for sensors of large hydraulic generating units, so as to solve the problems of cumbersome installation and easy loosening of the speed sensor after installation.

[0005] To overcome the problems existing in the prior art, the technical solution adopted by the present invention is: a position positioning device for sensors of large hydraulic generating units, comprising: A positioning sleeve, one end of the central hole of the positioning sleeve is provided with a first chamber, and the positioning sleeve is further provided with a third chamber outside the first chamber; A first linkage module, one end of the first linkage module is rotationally connected to the first chamber in a positioning manner, a spiral part is arranged on the outer circumferential wall of the first linkage module, and a first gear ring is arranged at one end of the first linkage module located in the first chamber; the inner hole of the first linkage module is used for installing a sensor; A second linkage module, one end of the second linkage module is elastically telescopic and rotatably connected to the third chamber, and a second gear ring meshing with the first gear ring is arranged at one end of the second linkage module located in the third chamber; A positioning seat, one end of the central hole of the positioning seat is provided with a linkage chamber, the inner wall of the linkage chamber is provided with a spiral ring, and a positioning chamber is arranged on the positioning seat outside the linkage chamber. The linkage chamber is used for inserting the first linkage module, the spiral part is rotationally connected with the spiral ring in a matching manner, and the positioning chamber is used for inserting the second linkage module; A limiting mechanism, which is used to lock the second linkage module to limit the rotation of the first linkage module.

[0006] The limiting mechanism includes a sliding sleeve and a positioning structure. The sliding sleeve is slidably sleeved on the outer circumferential wall of the positioning sleeve. A channel communicating with the third chamber is provided on the positioning sleeve. The positioning structure is installed on the second linkage module and is rotationally and cooperatively connected to the second linkage module. The positioning structure extends out of the channel and is fixedly connected to the sliding sleeve. A limiting device is fixedly installed in the third chamber. When the sliding sleeve is moved, the second linkage module is driven to slide, so that the limiting device cooperates with the second gear ring for limiting or the limiting device disengages from the second gear ring.

[0007] The positioning structure includes a limiting ring. The limiting ring is positioned and rotatably installed on the second linkage module, and the limiting ring is fixedly connected to the sliding sleeve.

[0008] The limiting device is a convex block structure. A notch cooperating with the limiting device is provided on the second gear ring. When the limiting device is caught in the notch, the second linkage module is locked.

[0009] A spring is installed in the third chamber. One end of the spring abuts against the positioning sleeve, and the other end abuts against the second linkage module.

[0010] The second linkage module includes a linkage column. An annular groove is provided on the linkage column. The limiting ring is movably installed in the annular groove. One end of the linkage column is inserted into the third chamber, and the second gear ring is installed at the end of the linkage column located in the third chamber.

[0011] The first linkage module includes a linkage cylinder. A first gear ring is provided at one end of the linkage cylinder, and the other end is an insertion section. A spiral part is provided on the insertion section.

[0012] A second chamber is provided inside the first chamber. The inner diameter of the second chamber is larger than that of the first chamber. The first gear ring is located in the second chamber. A fourth chamber is provided inside the positioning sleeve located in the third chamber. The inner diameter of the fourth chamber is larger than that of the third chamber. The second gear ring is located in the fourth chamber.

[0013] Two second linkage modules are symmetrically provided, and the number and positions of the positioning chambers correspond to those of the second linkage modules.

[0014] The usage method of a large hydropower generating unit sensor position positioning device as described above includes the following steps: S1. First, fixedly install the positioning seat into the installation hole of the carrier; S2. After passing the sensor through the positioning sleeve, then pass it through and fix it into the central hole of the first linkage module; S3. During installation, operate the limit mechanism to unlock the second linkage module, and then install the combination of the positioning sleeve, the first linkage module, and the sensor onto the positioning seat. Among them, the first linkage module is inserted into the linkage cavity, and the second linkage module is inserted into the positioning cavity. During the insertion process, the spiral part is in spiral fit with the spiral ring, and the first linkage module is inserted while rotating, simultaneously driving the second linkage module to rotate. After installation in place, operate the limit mechanism again to lock the second linkage module. During disassembly, operate the limit mechanism to unlock the second linkage module, and pull the positioning sleeve outwards to remove the first linkage module from the positioning seat by rotating it.

[0015] The present invention has the following beneficial effects: 1. The positioning sleeve of the present invention is used to install the first linkage module and the second linkage module, and the positioning seat is used to be fixedly installed on the carrier, that is, the position where the sensor to be installed is located. During use, operate the limit mechanism to unlock the second linkage module, and install the combination of the positioning sleeve, the first linkage module, and the sensor onto the positioning seat. During the installation process, the first linkage module is inserted into the linkage cavity, and the second linkage module is inserted into the positioning cavity. When the first linkage module is inserted into the linkage cavity, the spiral part is in spiral fit with the spiral ring, and the first linkage module is inserted while rotating, simultaneously driving the second linkage module to rotate. After installation in place, operate the limit mechanism again to lock the second linkage module. At this time, since the second linkage module is inserted into the positioning cavity and the second linkage module cannot rotate, and the first linkage module is in a rotary connection with the linkage cavity, the sensor is installed and fixed, and the installation is simple and convenient without loosening. In addition, during disassembly, operate the limit mechanism to unlock the second linkage module, and pull the positioning sleeve outwards, then the first linkage module can be removed from the positioning seat by rotating it, and the disassembly is also simple and convenient.

[0016] 2. The limiting device of the present invention is a convex block structure, and a notch cooperating with the limiting device is provided on the second gear ring. When the limiting device is caught in the notch, the second linkage module is locked. After locking, the second linkage module cannot rotate, which also makes the first linkage module unable to rotate. Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the present invention in the use state.

[0019] Figure 2 It is a schematic structural diagram of the present invention.

[0020] Figure 3 This is a schematic cross-sectional view of the positioning sleeve in the usage state of the present invention.

[0021] Figure 4 It is Figure 3 A schematic enlarged view of the structure at position Y in

[0022] Figure 5 This is a schematic semi-sectional view of the whole in the usage state of the present invention.

[0023] Figure 6 It is Figure 5 A schematic enlarged view of the structure at position Z in

[0024] Figure 7 This is an explosion diagram of the present invention.

[0025] Figure 8 This is a schematic view of the structure of the first linkage module of the present invention.

[0026] Reference numerals: Sensor 1, positioning sleeve 2, first linkage module 3, second linkage module 4; First chamber 10, second chamber 11, third chamber 12, fourth chamber 13, limiting device 14; Linkage cylinder 20, first gear ring 21, insertion section 22, spiral part 23; Second gear ring 30, linkage column 31, spring 32, notch 33; Carrier 40, positioning seat 41, linkage cavity 42, spiral ring 43, positioning cavity 44; Channel 50, annular groove 51, limiting ring 52, sliding sleeve 53. Detailed implementation manners

[0027] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0028] In the following description, many specific details are set forth to facilitate a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0029] Secondly, the so-called "this embodiment" or "embodiment" herein refers to specific features, structures or characteristics that may be included in at least one implementation manner of the present invention.

[0030] Next, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of description, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0031] Embodiment 1: See Figure 1-8 , this embodiment provides a sensor position positioning device for a large hydraulic generator set, including: A positioning sleeve 2, one end of the central hole of the positioning sleeve 2 is provided with a first chamber 10, and the positioning sleeve 2 is further provided with a third chamber 12 outside the first chamber 10; A first linkage module 3, one end of the first linkage module 3 is rotationally connected to the first chamber 10 in a positioning manner, a spiral portion 23 is provided on the outer circumferential wall of the first linkage module 3, and a first gear ring 21 is provided at one end of the first linkage module 3 located in the first chamber 10; the inner hole of the first linkage module 3 is used for installing the sensor 1; A second linkage module 4, one end of the second linkage module 4 is elastically telescopic and rotatably connected to the third chamber 12, and a second gear ring 30 meshing with the first gear ring 21 is provided at one end of the second linkage module 4 located in the third chamber 12; A positioning seat 41, one end of the central hole of the positioning seat 41 is provided with a linkage chamber 42, a spiral ring 43 is provided on the inner wall of the linkage chamber 42, and a positioning chamber 44 is provided outside the linkage chamber 42 on the positioning seat 41. The linkage chamber 42 is used for inserting the first linkage module 3, the spiral portion 23 is rotationally connected with the spiral ring 43, and the positioning chamber 44 is used for inserting the second linkage module 4; A limiting mechanism, which is used to lock the second linkage module 4 to limit the rotation of the first linkage module 3.

[0032] The positioning sleeve 2 is used for installing the first linkage module 3 and the second linkage module 4, and the positioning seat 41 is used for being fixedly installed on the carrier 40, that is, the position where the sensor 1 is to be installed. During use, operate the limiting mechanism to unlock the second linkage module 4, and install the combination of the positioning sleeve 2, the first linkage module 3, and the sensor 1 on the positioning seat 41; during the installation process, the first linkage module 3 is inserted into the linkage chamber 42, and the second linkage module 4 is inserted into the positioning chamber 44. When the first linkage module 3 is inserted into the linkage chamber 42, the spiral portion 23 is in spiral cooperation with the spiral ring 43, and the first linkage module 3 rotates and inserts, while driving the second linkage module 4 to rotate. After the installation is in place, operate the limiting mechanism again to lock the second linkage module 4. At this time, since the second linkage module 4 is inserted into the positioning chamber 44 and the second linkage module 4 cannot rotate, and the first linkage module 3 is in rotational connection with the linkage chamber 42, the sensor 1 is installed and fixed at this time, and the installation is simple and convenient and will not become loose.

[0033] When disassembling, operate the limit mechanism to unlock the second linkage module 4, and pull the positioning sleeve 2 outwards, then the first linkage module 3 can be rotated and taken out from the positioning seat 41, and the disassembly is also simple and convenient.

[0034] Embodiment 2: In this embodiment, refer to Figures 3 to 7 , the limit mechanism includes a sliding sleeve 53 and a positioning structure. The sliding sleeve 53 is slidably sleeved on the outer circumferential wall of the positioning sleeve 2. A channel 50 communicating with the third chamber 12 is provided on the positioning sleeve 2. The positioning structure is installed on the second linkage module 4. The positioning structure is rotationally and cooperatively connected with the second linkage module 4, and the positioning structure extends out of the channel 50 and is fixedly connected with the sliding sleeve 53. A limiting device 14 is fixedly installed in the third chamber 12; when the sliding sleeve 53 is moved, the second linkage module 4 is driven to slide, so that the limiting device 14 cooperates with the second gear ring 30 for limiting or the limiting device 14 disengages from the second gear ring 30. Through the above structure, when the sliding sleeve 53 is moved, the second linkage module 4 can be moved through the positioning structure, so that the limiting device 14 cooperates with the second gear ring 30 for limiting or the limiting device 14 disengages from the second gear ring 30.

[0035] Furthermore, refer to Figure 7 , a ring groove 51 is provided on the outer wall of the positioning sleeve 2, and the sliding sleeve 53 is installed in the chute.

[0036] Specifically, refer to Figure 8 , the positioning structure includes a limiting ring 52. The limiting ring 52 is rotationally positioned and installed on the second linkage module 4, and the limiting ring 52 is fixedly connected with the sliding sleeve 53. As Figure 8 shown, a boss is provided on the limiting ring 52. After passing through the channel 50, the boss is fixedly connected with the limiting ring 52. In this way, when the sliding sleeve 53 is moved, the limiting ring 52 is driven to move. Since the limiting ring 52 is rotationally and limitingly engaged with the moving second linkage module 4, the second linkage module 4 can be driven to move, and the second linkage module 4 can also rotate.

[0037] Refer to Figures 4 to 8 , in this embodiment, the limiting device 14 is a convex block structure, and a notch 33 cooperating with the limiting device 14 is provided on the second gear ring 30. When the limiting device 14 is stuck into the notch 33, the second linkage module 4 is locked. After locking, the second linkage module 4 cannot rotate, and thus the first linkage module 3 cannot rotate.

[0038] In this embodiment, one end of the second linkage module 4 is elastically telescopic and rotatably connected to the third chamber 12 through a spring 32.

[0039] Specifically, refer to Figure 5 、 6, a spring 32 is installed in the third chamber 12. One end of the spring 32 abuts against the positioning sleeve 2, and the other end abuts against the second linkage module 4.

[0040] In this embodiment, referring to Figure 6 , 8 , the second linkage module 4 includes a linkage column 31. An annular groove is provided on the linkage column 31, and a limit ring 52 is movably installed in the annular groove. One end of the linkage column 31 is inserted into the third chamber 12, and a second gear ring 30 is installed at the end of the linkage column 31 located in the third chamber 12.

[0041] During use, in combination with Figure 6 , move the sliding sleeve 53. The limit ring 52 moves with the sliding sleeve 53, thereby driving the linkage column 31 to move to the right, and the second gear ring 30 also moves to the right. The spring 32 is compressed. Since the limiting device 14 is fixed in the fourth chamber 13, the notch 33 on the second gear ring 30 is disengaged from the limiting device 14. At this time, when installing the sensor 1, the first linkage module 3 can rotate.

[0042] When the sliding sleeve 53 is released, the linkage column 31 moves to the left and resets under the action of the spring 32, and the notch 33 is inserted into the limiting device 14, and the linkage column 31 is limited again.

[0043] In order to improve the randomness of the cooperation between the limiting device 14 and the notch 33, the limiting device 14 can be a conical protrusion. At this time, the notch 33 is the tooth groove of the second gear ring 30, and this conical protrusion can be inserted into the tooth groove of the second gear ring 30. During implementation, the accuracy of the cooperation can be improved by increasing the number of teeth of the second gear ring 30.

[0044] In this embodiment, referring to Figure 7 , the first linkage module 3 includes a linkage cylinder 20. A first gear ring 21 is provided at one end of the linkage cylinder 20, and the other end is an insertion section 22. A spiral part 23 is provided on the insertion section 22.

[0045] Further, in order to rotatably limit and install the first linkage module 3 and the second linkage module 4 on the positioning sleeve 2, referring to Figure 7 , a second chamber 11 is provided inside the first chamber 10. The inner diameter of the second chamber 11 is larger than the inner diameter of the first chamber 10, and the first gear ring 21 is located in the second chamber 11; the positioning sleeve 2 is provided with a fourth chamber 13 inside the third chamber 12. The inner diameter of the fourth chamber 13 is larger than the inner diameter of the third chamber 12, and the second gear ring 30 is located in the fourth chamber 13.

[0046] Referring to Figure 7 , in this embodiment, two second linkage modules 4 are symmetrically provided, and the number and position of the positioning cavities 44 correspond to those of the second linkage modules 4. Further improve the installation stability.

[0047] Example 3: Refer to Figure 1 and 2 Figure 3 and Figure 7, and adopt a method for using a positioning device for the sensor position of a large - scale hydraulic generator set, including the following steps.

[0048] S1. Refer to Figure 1 Figure 5, first fixedly install the positioning seat 41 into the installation hole of the carrier 40. The positioning seat 41 can be fixedly connected to the carrier 40 by welding.

[0049] S2. Refer to Figure 1 and 2 Figure 6, after passing the sensor 1 through the positioning sleeve 2, then pass it into the central hole of the first linkage module 3 which is fixed.

[0050] S3. During installation, operate the limiting mechanism to unlock the second linkage module 4, and then install the combination of the positioning sleeve 2, the first linkage module 3 and the sensor 1 onto the positioning seat 41; among them, the first linkage module 3 is inserted into the linkage cavity 42, and the second linkage module 4 is inserted into the positioning cavity 44. During the insertion process, the spiral part 23 is in spiral cooperation with the spiral ring 43, and the first linkage module 3 is inserted while rotating, and at the same time drives the second linkage module 4 to rotate. After installation in place, operate the limiting mechanism again to lock the second linkage module 4.

[0051] Specifically, refer to Figure 7 and 8 Figure 8, move the sliding sleeve 53, and the limiting ring 52 moves with the sliding sleeve 53, thereby driving the linkage column 31 to move to the right, and the second gear ring 30 also moves to the right, and the spring 32 is compressed. Since the limiting device 14 is fixed in the fourth chamber 13, the notch 33 on the second gear ring 30 is disengaged from the limiting device 14. When installing the sensor 1, the linkage column 31 is inserted into the positioning cavity 44, and the insertion section 22 is inserted into the linkage cavity 42. When the insertion section 22 is inserted into the linkage cavity 42, the spiral part 23 is in spiral cooperation with the spiral ring 43, and the insertion section 22 is inserted while rotating, and at the same time drives the linkage column 31 to rotate. After installation in place, release the sliding sleeve 53, and the linkage column 31 moves to the left and resets under the action of the spring 32, and the limiting device 14 is inserted into the notch 33 again to limit the linkage column 31. At this time, the sensor 1 is installed and fixed, and the installation is simple and convenient and will not become loose.

[0052] During disassembly, operate the limiting mechanism, move the sliding sleeve 53 on the right to unlock the second linkage module 4, pull out the positioning sleeve 2 outward, and rotate the first linkage module 3 out of the positioning seat 41.

[0053] It should be understood that, during the development of any actual implementation, in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be routine work of design, manufacture, and production.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A sensor position positioning device for a large hydroelectric generator set, characterized in that: include: A positioning sleeve (2), wherein a first chamber (10) is provided at one end of the center hole of the positioning sleeve (2), and a third chamber (12) is further provided on the outside of the first chamber (10) of the positioning sleeve (2); A first linkage module (3), one end of the first linkage module (3) being connected to the first chamber (10) in a positionally rotatable manner, an outer circumferential wall of the first linkage module (3) being provided with a spiral portion (23), and one end of the first linkage module (3) located in the first chamber (10) being provided with a first gear ring (21); an inner hole of the first linkage module (3) being used for mounting a sensor (1); A second linkage module (4), one end of the second linkage module (4) being elastically and telescopically and rotatably connected to the third chamber (12), and one end of the second linkage module (4) located in the third chamber (12) being provided with a second gear ring (30) meshing with the first gear ring (21); A positioning seat (41), wherein a linkage cavity (42) is provided at one end of a center hole of the positioning seat (41), a spiral ring (43) is provided on an inner wall of the linkage cavity (42), a positioning cavity (44) is provided on the positioning seat (41) outside the linkage cavity (42), the linkage cavity (42) is used to insert a first linkage module (3), the spiral portion (23) and the spiral ring (43) are screwed together, and the positioning cavity (44) is used to insert a second linkage module (4); A limiting mechanism, the limiting mechanism is used to lock the second linkage module (4) to limit the rotation of the first linkage module (3).

2. A sensor position positioning device for a large-scale hydroelectric generator set according to claim 1, characterized in that: The limiting mechanism comprises a sliding sleeve (53) and a positioning structure, wherein the sliding sleeve (53) is slidingly mounted on the outer circumferential wall of the positioning sleeve (2), the positioning sleeve (2) is provided with a channel (50) communicating with the third chamber (12), the positioning structure is mounted on the second linkage module (4), the positioning structure is rotationally connected with the second linkage module (4), and the positioning structure extends out of the channel (50) and is fixedly connected with the sliding sleeve (53), and a limiting device (14) is fixedly mounted in the third chamber (12); when the sliding sleeve (53) is moved, the second linkage module (4) is driven to slide, so that the limiting device (14) cooperates with the second gear ring (30) to limit or the limiting device (14) is separated from the second gear ring (30).

3. A sensor position positioning device for a large hydroelectric generator set according to claim 2, characterized in that: The positioning structure comprises a limiting ring (52), the limiting ring (52) is mounted on the second linkage module (4) in a positioning and rotatable manner, and the limiting ring (52) is connected and fixed to the sliding sleeve (53).

4. A sensor position positioning device for a large-scale hydroelectric generator set according to claim 2, characterized in that: The limiting device (14) is a convex block structure, and the second gear ring (30) is provided with a notch (33) that matches the limiting device (14). When the limiting device (14) is inserted into the notch (33), the second linkage module (4) is locked.

5. A sensor position positioning device for a large-scale hydroelectric generator set according to claim 1, characterized in that: A spring (32) is installed in the third chamber (12), with one end of the spring (32) abutting against the positioning sleeve (2) and the other end abutting against the second linkage module (4).

6. A sensor position positioning device for a large-scale hydroelectric generator set according to any one of claims 3 to 5, characterized in that: The second linkage module (4) comprises a linkage column (31), the linkage column (31) being provided with an annular groove, the limiting ring (52) being movably mounted in the annular groove, one end of the linkage column (31) being inserted into the third chamber (12), and the second gear ring (30) being mounted on one end of the linkage column (31) located in the third chamber (12).

7. A sensor position positioning device for a large-scale hydroelectric generator set according to claim 1, characterized in that: The first linkage module (3) comprises a linkage cylinder (20), one end of the linkage cylinder (20) being provided with a first gear ring (21), the other end being an insertion section (22), and the spiral portion (23) being provided on the insertion section (22).

8. A sensor position positioning device for a large-scale hydroelectric generator set according to claim 1, characterized in that: A second chamber (11) is disposed inside the first chamber (10), the inner diameter of the second chamber (11) is larger than the inner diameter of the first chamber (10), and the first gear ring (21) is located inside the second chamber (11); the positioning sleeve (2) is disposed inside the third chamber (12) with a fourth chamber (13), the inner diameter of the fourth chamber (13) is larger than the inner diameter of the third chamber (12), and the second gear ring (30) is located inside the fourth chamber (13).

9. A sensor position positioning device for a large-scale hydroelectric generator set according to claim 1, characterized in that: Two of the second linkage modules (4) are symmetrically arranged, and the number and positions of the positioning cavities (44) correspond to those of the second linkage modules (4).

10. A method for using a large-scale hydroelectric generator sensor position positioning device according to any one of claims 1 to 9, comprising the following steps: S1, first fix the positioning seat (41) into the mounting hole of the carrier (40); S2, passing the sensor (1) through the positioning sleeve (2), and then inserting and fixing it into the central hole of the first linkage module (3); S3. During installation, the limiting mechanism is operated to unlock the second linkage module (4), and then the assembly of the positioning sleeve (2), the first linkage module (3) and the sensor (1) is installed on the positioning seat (41); wherein the first linkage module (3) is inserted into the linkage cavity (42), and the second linkage module (4) is inserted into the positioning cavity (44). During the insertion process, the spiral portion (23) and the spiral ring (43) are spirally matched, and the first linkage module (3) is inserted by rotation, while driving the second linkage module (4) to rotate. After the first linkage module (3) is installed in place, the limiting mechanism is operated to lock the second linkage module (4). During disassembly, the limiting mechanism is operated to unlock the second linkage module (4), the positioning sleeve (2) is pulled outward, and the first linkage module (3) is rotated and taken out of the positioning seat (41).

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