Stator pull-through ranging aid and stator pull-through method

Abstract

The application relates to a stator extraction and insertion distance measuring auxiliary device for assisting in extracting or inserting a rotor of an exciter into a stator, wherein the stator extraction and insertion distance measuring auxiliary device comprises a shaft assembly and a distance measuring assembly. The shaft assembly is connected with a bottom wall of a rotor cavity of the rotor and coaxially arranged with the rotor cavity, and the distance measuring assembly comprises a plurality of distance measuring elements which are uniformly arranged on an outer wall of the shaft assembly in a circumferential direction of the shaft assembly and used for measuring radial distances between the outer wall of the shaft assembly and side walls of stator holes of the stator. The stator extraction and insertion distance measuring auxiliary device can be used in practice, and whether distance data obtained by the plurality of distance measuring elements changes or not is determined, so as to determine whether the stator is deviated during the process of being inserted into or extracted from the rotor. If distance parameters measured by some distance measuring elements change, the stator is deviated, the stator needs to be stopped from being inserted or extracted, and the stator and the rotor are prevented from colliding.

Description

Technical Field

[0001] This application relates to the field of exciter stator disassembly and adjustment technology, and in particular to a stator penetration distance measuring auxiliary device and a stator penetration method. Background Technology

[0002] Currently, during major overhauls of nuclear power plants, it is necessary to extract the exciter stator from the rotor for inspection and then reinstall it back inside the rotor. In the exciter, the air gap between the stator and rotor is extremely small, typically only a few millimeters. Furthermore, the stator is relatively large in size and weight, and its extraction usually requires a large drive unit. Because the gap between the stator and rotor is so small, it is difficult to measure using instruments and tools, and usually relies on manual observation. This means that operating the drive unit and observing the air gap between the stator and rotor require different personnel, resulting in high time and labor costs, low efficiency, poor accuracy of manual observation, and a high risk of collisions. Summary of the Invention

[0003] Therefore, it is necessary to provide a stator penetration distance measuring auxiliary device to address the problems of existing technologies that rely on manual observation for stator penetration, which is time-consuming, inefficient, and prone to collisions.

[0004] This application provides a stator extraction and ranging auxiliary device for assisting in the extraction or insertion of a stator into a rotor. The stator extraction and ranging auxiliary device comprises:

[0005] A shaft assembly is connected to the bottom wall of the rotor cavity of the rotor and is coaxially arranged with the rotor cavity;

[0006] A ranging assembly includes multiple ranging elements uniformly arranged on the outer wall of the shaft assembly along the circumference of the shaft assembly. The ranging elements are used to measure the radial distance between the outer wall of the shaft assembly and the inner wall of the stator hole of the stator.

[0007] The aforementioned stator insertion and removal distance measuring auxiliary device, when assisting in the actual insertion or removal of the stator from the exciter rotor, uses a distance measuring component mounted on a shaft assembly coaxially with the rotor cavity. This component is evenly distributed along the circumference of the shaft assembly on its outer wall. The distance measuring component allows for the measurement of the radial distance between the outer wall of the shaft assembly and the side wall of the stator hole. Because the shaft assembly and rotor cavity are coaxial and the distance measuring components are evenly distributed along the circumference of the shaft assembly, the distance data measured by multiple distance measuring instruments are equal when the stator is inserted or removed from the rotor cavity. The operator checks whether the radial distance data between the outer wall of the shaft assembly and the side wall of the stator hole changes, thus determining whether the stator has shifted during insertion or removal. If the distance parameters measured by some distance measuring instruments change, the stator has shifted, requiring the insertion or removal to be stopped, thereby preventing collision between the stator and rotor.

[0008] In one embodiment, the ranging components are at least two sets, namely a first set of ranging components and a second set of ranging components;

[0009] The first set of ranging components is disposed at one end of the shaft assembly near the rotor, and the second set of ranging components is disposed at one end of the shaft assembly away from the bottom wall of the rotor cavity. The axial distance between the first set of ranging components and the second set of ranging components is less than the axial length of the stator.

[0010] In one embodiment, the ranging device is a laser rangefinder;

[0011] The laser rangefinder is fixed to the outer peripheral wall of the shaft assembly via a magnetic base; or

[0012] It is fastened to the shaft assembly by fasteners.

[0013] In one embodiment, the ranging components are at least two groups; each group of the ranging components includes four or eight ranging elements, and the ranging elements of each group of the ranging components are located at the same axial position and are evenly arranged circumferentially.

[0014] In one embodiment, the stator penetration ranging auxiliary device further includes a processing module, a display module, and an alarm module;

[0015] The processing module is connected to the ranging device and is used to receive and process the data signals of the ranging device.

[0016] The display module is signal-connected to the processing module and is used to display distance data measured by the multiple rangefinders;

[0017] The alarm module is connected to the processing module and is used to issue an alarm signal when the distance data measured by the rangefinder exceeds a set value.

[0018] In one embodiment, the shaft assembly has an axial cavity at one end away from the bottom wall of the rotor cavity, and the shaft assembly has a radially penetrating wire hole, through which the power line of the ranging device and the signal line between the ranging device and the processing module pass.

[0019] In one embodiment, the shaft assembly includes a ranging shaft and a positioning seat;

[0020] The positioning seat is connected to the bottom wall of the rotor cavity and is coaxially arranged with the rotor cavity. The end face of the positioning seat away from the bottom wall of the rotor cavity forms a positioning structure.

[0021] The positioning structure is coaxially arranged with the rotor cavity, and the inner or outer peripheral wall of the ranging shaft abuts against the positioning structure.

[0022] In one embodiment, the inner peripheral wall of the ranging shaft abuts against the outer peripheral wall of the positioning structure; the shaft assembly further includes a fastening sleeve, the fastening sleeve being connected to the end face of the positioning seat away from the bottom wall of the rotor cavity and coaxially disposed with the rotor cavity, and the outer wall of the ranging shaft abuts against the inner wall of the fastening sleeve.

[0023] Alternatively, the ranging axis and the positioning seat may be integrally formed, or the ranging axis and the positioning seat may be welded together, or the ranging axis and the positioning seat may be fixedly connected by fasteners.

[0024] An embodiment of this application also provides a stator penetration method, using a stator penetration device and the aforementioned stator penetration ranging auxiliary device, including:

[0025] The shaft assembly is mounted on the inner bottom wall of the rotor cavity and is coaxial with the rotor cavity;

[0026] The extraction device is fixedly connected to the side of the stator away from the bottom of the rotor cavity, and the stator is driven to move axially.

[0027] The distance measuring device is used to obtain the gap between the inner peripheral wall of the stator and the shaft assembly during the stator insertion process.

[0028] When the gap value obtained by any of the ranging devices exceeds the preset range, the stator is not pierced and the gap between the stator and the rotor is adjusted.

[0029] In one embodiment, the stator piercing device includes a piercing device connected to the stator and a control system for controlling the operation of the piercing device. The stator piercing ranging auxiliary device further includes a processing module, which is used to receive and process the data signal of the ranging component and is communicatively connected to the control system.

[0030] When the gap value obtained by any of the ranging devices exceeds the preset range, the processing module sends a stop signal to the control system, and the control system controls the piercing device to stop the piercing action.

[0031] The aforementioned stator insertion and distance measuring auxiliary device, when assisting in the actual insertion or removal of the stator from the exciter rotor, uses a distance measuring component mounted on a shaft assembly coaxially with the rotor cavity. This component is evenly distributed along the circumference of the shaft assembly on its outer wall. The distance measuring component allows for the measurement of the radial distance between the outer wall of the shaft assembly and the side wall of the stator hole. Because the shaft assembly and rotor cavity are coaxial and the distance measuring components are evenly distributed along the circumference of the shaft assembly, the distance data measured by multiple distance measuring instruments are equal when the stator is inserted or removed from the rotor cavity. The operator can then determine whether the radial distance data between the outer wall of the shaft assembly and the side wall of the stator hole changes by measuring multiple distance measuring instruments. This allows for the assessment of whether the stator has shifted during insertion or removal. If the distance parameters measured by some distance measuring instruments change, the stator has shifted, requiring the insertion or removal to be stopped. This prevents collisions between the stator and rotor, eliminates manual observation, reduces labor costs, and improves efficiency and accuracy. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a stator insertion distance measuring auxiliary device according to an embodiment, which assists in inserting the stator into the rotor.

[0033] Figure 2 for Figure 1 Cross-sectional view.

[0034] Explanation of icon numbers:

[0035] 100-Stator penetration distance measuring auxiliary device;

[0036] 110 - Shaft assembly; 111 - Positioning seat; 112 - Distance measuring shaft; 113 - Positioning structure; 114 - Fastening sleeve;

[0037] 120 - Distance measuring component;

[0038] 210 - Stator; 211 - Stator hole;

[0039] 220 - Rotor; 221 - Rotor cavity;

[0040] 230 - Stator insertion device. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "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 mechanical connection or an electrical connection; 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 based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0047] See Figure 1 The stator insertion distance measuring auxiliary device 100 of this application is used to assist the stator insertion device 230 in extracting or inserting the stator 210 into the rotor 220 of the exciter. The stator 210 has a stator hole 211 along its axial direction, and the rotor 220 of the exciter has a rotor cavity 221 along its axial direction. After the stator 210 is inserted into the rotor 220, it is located in the rotor cavity 221. It is understood that the stator insertion distance measuring auxiliary device 100 described herein is only used as an example of an exciter and is not limited to use in an exciter. It can also be used in other situations where stator insertion is required.

[0048] See Figure 2 , Figure 2 A cross-sectional view of the structure of a stator penetration distance measuring auxiliary device 100 according to an embodiment of this application is shown. The stator penetration distance measuring auxiliary device 100 provided in an embodiment of this application includes a shaft assembly 110 and a distance measuring assembly 120.

[0049] In the aforementioned stator penetration distance measuring auxiliary device 100, the shaft assembly 110 is connected to the bottom wall of the rotor cavity 221 of the rotor 220 and is coaxially arranged with the rotor cavity 221. The distance measuring assembly 120 includes multiple distance measuring elements (not shown in the figure), which are uniformly arranged on the outer wall of the shaft assembly 110 along the circumference of the shaft assembly 110. The distance measuring elements are used to measure the radial distance between the outer wall of the shaft assembly 110 and the side wall of the stator hole 211 of the stator 210.

[0050] When the stator insertion and distance measuring auxiliary device 100 described above actually assists the stator 210 in being inserted into or removed from the rotor 220 of the exciter, it provides a distance measuring component 120 on the shaft assembly 110, which is coaxially arranged with the rotor cavity 221. The distance measuring component 120 is uniformly arranged along the circumference of the shaft assembly 110 on the outer wall of the shaft assembly 110. Thus, the radial distance between the outer wall of the shaft assembly 110 and the side wall of the stator hole 211 of the stator 210 can be measured by the distance measuring component. Since the shaft assembly 110 is coaxially arranged with the rotor cavity 221 and the distance measuring component 120 is uniformly arranged along the circumference of the shaft assembly 110 on the outer wall of the shaft assembly 110, the distance data measured by multiple distance measuring instruments are equal when the stator 210 is coaxially inserted into or removed from the rotor cavity 221. The operator measures the radial distance between the outer wall of the shaft assembly 110 and the side wall of the stator hole 211 of the stator 210 using multiple rangefinders to determine whether the distance data changes. This helps determine whether the stator 210 is offset during the insertion or removal of the rotor 220. If the distance parameters measured by some of the rangefinders change, the stator 210 is offset, and the insertion or removal of the stator 210 needs to be stopped to prevent the stator 210 from colliding with the rotor 220.

[0051] In the ranging assembly 120, multiple ranging elements are evenly arranged on the outer wall of the shaft assembly 110 along the circumference of the shaft assembly 110. The number of ranging elements is preferably set to reflect the sway of the stator 210 in all directions. Optionally, the ranging assembly 120 has at least three ranging elements, for example, four or eight. In one specific embodiment, the ranging assembly 120 has four ranging elements to reflect the sway of the stator in the up, down, left, and right directions. In another specific embodiment, the ranging assembly 120 has eight ranging elements to reflect the sway of the stator in eight directions: up, down, left, right, upper left, lower left, upper right, and lower right.

[0052] In one embodiment, there are two sets of ranging components 120: a first set and a second set. The first set of ranging components is located at the end of the shaft assembly 110 near the rotor 220, and the second set is located at the end of the shaft assembly 110 away from the bottom wall of the rotor cavity 221. The axial distance between the first and second sets of ranging components is less than the axial length of the stator 210. This design ensures that during the stator insertion process, one set of ranging components 120 is always located within the stator 210. In practical applications, when a set of ranging components measures multiple radial directions, regardless of any form of stator offset, including overall radial translation (while still axially parallel to the rotor 220) or radial sway of one end relative to the other, the data measured by multiple ranging components will become inconsistent. Therefore, one set of ranging components 120 is sufficient to reflect the offset of the stator 210.

[0053] In another embodiment, the number of ranging components 120 is at least three sets, which are arranged at intervals along the axial direction, and the total axial length of three adjacent sets of ranging components 120 is less than or equal to the axial length of the stator 210. The purpose of this arrangement is that during the stator insertion process, at least two sets of ranging components 120 are located inside the stator 210, which can further reflect the specific sway of the stator 210, such as one end swaying to the left relative to the other end.

[0054] In one embodiment, the ranging device is a laser rangefinder. Multiple laser rangefinders are uniformly arranged on the outer wall of the shaft assembly 110 along the circumference of the shaft assembly 110. This allows the rangefinder to measure the radial distance between the outer wall of the shaft assembly 110 and the side wall of the stator hole 211 of the stator 210 by emitting a laser beam toward the side wall of the stator hole 211. Furthermore, the laser rangefinder has higher accuracy and can meet the requirements of radial clearance between the outer wall of the stator 210 and the side wall of the rotor cavity 221 for different applications.

[0055] In one embodiment, the measuring element is a measuring ruler. Multiple measuring rulers are evenly arranged on the outer wall of the shaft assembly 110 along the circumference of the shaft assembly 110, so that the radial distance between the outer wall of the shaft assembly 110 and the side wall of the stator hole 211 of the stator 210 can be measured by the extension and retraction of the measuring rulers.

[0056] Preferably, the measuring ruler is an electric measuring ruler, which allows the operator to easily adjust the length of the measuring ruler outside the stator 210 to measure the radial distance between the outer wall of the shaft assembly 110 and the side wall of the stator hole 211 of the stator 210.

[0057] The method of fixing the rangefinder to the shaft assembly 110 is not limited; any method that can hold the rangefinder in a specific position during the insertion process can be applied. For example, a magnetic base is provided below the rangefinder, and the shaft assembly is made of a magnetizable material such as stainless steel. The rangefinder is attracted to the outer peripheral wall of the shaft assembly 110 via the magnetic base. Alternatively, the base below the rangefinder can be fixed to the shaft assembly 110 using screws, retaining rings, or other methods. Many other methods will not be listed here.

[0058] In one embodiment, the stator insertion and distance measuring auxiliary device 100 further includes a processing module and a display module. The processing module is connected to the distance measuring element and is used to receive and process the data signals from the distance measuring element. The display module is signal-connected to the processing module and is used to display the distance data measured by multiple distance measuring elements for more intuitive reference by the operator. The processing module and the display module are preferably fixedly installed outside the stator, so that the distance data measured by multiple distance measuring elements can be displayed on the outside of the stator 210 and informed to the operator. This allows the operator to easily remove or insert the stator 210 into the rotor 220 while observing the distance data measured by the distance measuring elements, thereby saving labor costs.

[0059] The processing module can take any form, such as software built into a computer terminal or similar device capable of processing data. The display module can be a screen on a computer terminal or similar device, or other display formats connected to a computer terminal.

[0060] In one embodiment, the stator penetration distance measuring auxiliary device 100 further includes an alarm module (not shown). The alarm module is signal-connected to the processing module. When the distance data measured by the distance measuring device exceeds the set value, the processing module controls the alarm module to issue an alarm signal.

[0061] In one embodiment, the alarm module is a buzzer. When the distance data measured by the rangefinder exceeds a set value, the controller controls the alarm module to emit an audible alarm signal.

[0062] In another embodiment, the alarm module is an alarm light. When the distance data measured by the rangefinder exceeds the set value, the controller controls the alarm module to emit a light alarm signal.

[0063] In one embodiment, the alarm module is built into the computer terminal and can be integrated with the processing module. When an alarm signal is required, it can be displayed on the display module in the form of an image or other means.

[0064] In many embodiments, various alarm modules described above can be used in combination.

[0065] It should be noted that during the stator insertion process, the stator insertion device 230, which connects to and drives the stator 210 to move axially, includes insertion equipment directly connected to the stator and a control system. The movement of the insertion equipment is controlled by the control system. Optionally, the aforementioned processing module is communicatively connected to the control system. When the processing module calculates that the data measured by the ranging device exceeds the set value, the processing module sends a stop drive signal to the control system. At this time, the control system stops controlling the insertion equipment, thereby stopping the drive of the stator 210 to prevent collision between the stator 210 and the rotor 220.

[0066] In one embodiment, the processing module can be integrated with and communicate with the control system.

[0067] See Figure 2 Preferably, the shaft assembly 110 includes a positioning seat 111 and a ranging shaft 112. The positioning seat 111 is connected to the bottom wall of the rotor cavity 221 of the rotor 220 and is coaxially arranged with the rotor cavity 221. A positioning structure 113 is provided at the end of the positioning seat 111 away from the bottom wall of the rotor cavity 221. The outer wall of the end of the ranging shaft 112 close to the bottom wall of the rotor cavity 221 is coaxially arranged with the inner wall of the positioning structure 113 and the rotor cavity 221.

[0068] In one embodiment, the shaft assembly 110 includes a ranging shaft and a positioning seat 111. The positioning seat 111 is connected to the bottom wall of the rotor cavity 221 and is coaxially arranged with the rotor cavity 221. A positioning structure 113 is provided on the end face of the positioning seat 111 away from the bottom wall of the rotor cavity 221. The positioning structure is coaxially arranged with the rotor cavity 221. The outer wall of the ranging shaft 112 abuts against the inner side wall of the positioning structure 113, or the inner wall of the ranging shaft 112 abuts against the outer side wall of the positioning structure 113. By providing a positioning structure 113 coaxially arranged with the rotor cavity 221 on a positioning seat 111 connected to and coaxially arranged with the rotor cavity 221, and setting the inner and outer diameters of the positioning structure 113 and the ranging shaft 112 such that the outer wall of the ranging shaft 112 abuts against the inner wall of the positioning structure 113, and the inner wall of the second shaft 112 abuts against the outer wall of the positioning structure 113, or the inner wall of the ranging shaft 112 abuts against the outer wall of the positioning structure 113, the ranging shaft 112 can be directly inserted into the positioning structure 113 or the positioning shaft 112 can be sleeved on the positioning structure 113, thereby achieving coaxial arrangement of the positioning shaft 112 and the rotor cavity 221 in a relatively simple manner.

[0069] One end of the positioning seat 111 that is away from the positioning structure 113 is connected to the bottom wall of the rotor cavity 221. For example, the bottom wall of the rotor cavity 221 is provided with a concave stop that is coaxial with it. The size of the positioning seat 111 is adapted to the concave stop to ensure the coaxiality between the positioning seat 111 and the rotor cavity 221. The two are further locked together by screws or the like.

[0070] See Figure 2 In one embodiment, the stator penetration distance measuring auxiliary device 100 further includes a fastening sleeve 114. The fastening sleeve 114 is connected to the end face of the positioning seat 113 away from the bottom wall of the rotor cavity 221 and is coaxial with the rotor cavity. The outer side wall of the distance measuring shaft 112 abuts against the inner side wall of the fastening sleeve 114, thereby providing a certain support for the distance measuring shaft 112 and preventing it from shifting or falling off.

[0071] In another embodiment, the distance measuring axis 112 and the positioning structure 113 can also be connected in a non-detachable manner. For example, the distance measuring axis 112 and the positioning seat 111 are integrally formed, or the distance measuring axis 112 and the positioning seat 111 are welded together, or the distance measuring axis 112 and the positioning seat 111 are fixedly connected by fasteners.

[0072] Based on the above, the ranging components are mounted on the ranging shaft 112 of the shaft assembly 110, while the power supply components that provide power to these ranging components and the processing modules that receive their data signals are mounted externally and do not move with the stator being pulled through. In this embodiment, the end of the ranging shaft 112 of the shaft assembly 110 that is away from the bottom wall of the rotor cavity 221 has an axial cavity (not shown). That is, at least the portion of the ranging shaft 112 located on the outer side is a hollow shaft, and the ranging shaft 112 has a radially penetrating wire hole (not shown). The position of the wire hole preferably corresponds to the position of the ranging component. The power line of the ranging component and the signal line between the ranging component and the processing module pass through the wire hole and the cavity to avoid a large number of wires on the outer circumference of the ranging shaft 112, which facilitates the arrangement of the wires and eliminates the need for additional fixing or binding structures on the ranging shaft 112.

[0073] This application embodiment also provides a stator penetration method, using penetration equipment and the aforementioned stator penetration ranging auxiliary device, including:

[0074] The shaft assembly 110 is installed on the inner bottom wall of the rotor cavity, making it coaxial with the rotor cavity 221;

[0075] The extraction and piercing device is fixedly connected to the side of the stator away from the bottom of the rotor cavity 221. The extraction and piercing device is started and the stator is driven to move axially, that is, to extract or pierce the stator 210.

[0076] The gap between the inner circumferential wall of the stator 210 and the shaft assembly 110 during the stator insertion process is obtained by measuring the distance.

[0077] When the gap value obtained by any of the ranging devices exceeds the preset range, it indicates that the stator 210 has shifted relative to the rotor 220. At this time, the pulling of the stator 210 should be stopped and the gap between the stator 210 and the rotor 220 should be adjusted until the two are coaxial again.

[0078] Specifically, when the gap value obtained by any of the ranging devices exceeds the preset range, the processing module sends a stop signal to the control system. Upon receiving the stop signal, the control system stops the movement of the piercing device. The operator adjusts the piercing device through the control system to re-coaxialize the stator 210 and rotor 220. Then, the control system starts the piercing device and continues the stator piercing process until it is complete.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0080] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A stator extraction and ranging auxiliary device, used to assist in the extraction or insertion of the stator into the rotor, characterized in that, The stator penetration ranging auxiliary device includes: Axis assembly, the shaft assembly including a ranging shaft and a positioning seat; A ranging assembly includes multiple ranging elements, which are uniformly arranged on the outer wall of the shaft assembly along the circumference of the shaft assembly. The ranging elements are used to measure the radial distance between the outer wall of the shaft assembly and the inner wall of the stator hole of the stator. The positioning seat is connected to the bottom wall of the rotor cavity of the rotor and is coaxially arranged with the rotor cavity. The end face of the positioning seat away from the bottom wall of the rotor cavity forms a positioning structure. The positioning structure is coaxially arranged with the rotor cavity, and the inner or outer peripheral wall of the ranging shaft abuts against the positioning structure.

2. The stator penetration ranging auxiliary device according to claim 1, characterized in that, The ranging components are at least two sets, namely a first set of ranging components and a second set of ranging components; The first set of ranging components is disposed at one end of the shaft assembly near the rotor, and the second set of ranging components is disposed at one end of the shaft assembly away from the bottom wall of the rotor cavity. The axial distance between the first set of ranging components and the second set of ranging components is less than the axial length of the stator.

3. The stator penetration ranging auxiliary device according to claim 1, characterized in that, The ranging device is a laser rangefinder; The laser rangefinder is fixed to the outer peripheral wall of the shaft assembly via a magnetic base; or It is fastened to the shaft assembly by fasteners.

4. The stator penetration ranging auxiliary device according to claim 1, characterized in that, The ranging components are at least two groups; each group of the ranging components includes four or eight ranging elements, and the ranging elements of each group of the ranging components are located at the same axial position and are evenly arranged circumferentially.

5. The stator penetration distance measuring auxiliary device according to any one of claims 1-4, characterized in that, The stator penetration ranging auxiliary device also includes a processing module, a display module, and an alarm module; The processing module is connected to the ranging device and is used to receive and process the data signals of the ranging device. The display module is signal-connected to the processing module and is used to display distance data measured by the multiple rangefinders; The alarm module is connected to the processing module and is used to issue an alarm signal when the distance data measured by the rangefinder exceeds a set value.

6. The stator penetration ranging auxiliary device according to claim 5, characterized in that, The shaft assembly has an axial cavity at one end away from the bottom wall of the rotor cavity, and a radial through hole is provided on the shaft assembly. The power line of the ranging device and the signal line between the ranging device and the processing module pass through the through hole and the cavity.

7. The stator penetration ranging auxiliary device according to claim 1, characterized in that, The inner peripheral wall of the ranging shaft abuts against the outer peripheral wall of the positioning structure; the shaft assembly also includes a fastening sleeve, the fastening sleeve is connected to the end face of the positioning seat away from the bottom wall of the rotor cavity and is coaxially arranged with the rotor cavity, and the outer wall of the ranging shaft abuts against the inner wall of the fastening sleeve. Alternatively, the ranging axis and the positioning seat may be integrally formed, or the ranging axis and the positioning seat may be welded together, or the ranging axis and the positioning seat may be fixedly connected by fasteners.

8. A method for stator insertion, characterized in that, Using the stator penetration device and the stator penetration ranging auxiliary device according to any one of claims 1-7, comprising: The shaft assembly is mounted on the inner bottom wall of the rotor cavity and is coaxial with the rotor cavity; The extraction device is fixedly connected to the side of the stator away from the bottom of the rotor cavity, and the stator is driven to move axially. The distance measuring device is used to obtain the gap between the inner peripheral wall of the stator and the shaft assembly during the stator insertion process. When the gap value obtained by any of the ranging devices exceeds the preset range, the stator is not pierced and the gap between the stator and the rotor is adjusted.

9. The stator insertion method as described in claim 8, characterized in that, The stator piercing device includes a piercing device connected to the stator and a control system for controlling the action of the piercing device. The stator piercing ranging auxiliary device also includes a processing module, which is used to receive and process the data signal of the ranging component and is communicatively connected to the control system. When the gap value obtained by any of the ranging devices exceeds the preset range, the processing module sends a stop signal to the control system, and the control system controls the piercing device to stop the piercing action.

Images