Six-degree-of-freedom exciter armature pull-through device

Abstract

The application discloses a six-degree-of-freedom exciter armature pulling device, which comprises a frame, a lower device, a middle device and an upper device arranged in sequence from bottom to top on the frame bottom plate. The frame is provided with a plurality of adjustable supporting legs for adjusting the overall height and pitch angle; the lower device is rotatably connected with the frame bottom plate and the relative angle of the lower device relative to the frame is adjusted through a rotary adjusting device; the middle device is slidingly matched with the lower device to realize lateral translation; the upper device is slidingly matched with the middle device to realize translation in the pulling direction; the upper device is provided with a roller set at the top, and the driving roller set is connected with a hand-operated speed reducer for driving the armature to rotate and align holes. The six-degree-of-freedom exciter armature pulling device provided by the application can provide stable bottom support, realize high-precision six-degree-of-freedom adjustment in the armature pulling operation, effectively solve the problems of large structural deformation, difficult alignment and laborious pulling in the prior art, and significantly improve the operation safety and efficiency.

Description

Technical Field

[0001] This application relates to the field of auxiliary equipment technology for motor maintenance, specifically to a six-degree-of-freedom exciter armature pull-out device. Background Technology

[0002] The exciter armature is the core component of a rotating armature AC exciter, installed within the narrow bore of the exciter stator. During major overhauls or troubleshooting, the armature must be horizontally removed from the stator bore (i.e., the removal and insertion process). During this process, due to the armature's large weight, length, and extremely small clearance (typically only 2-3 mm) between it and the stator shaft, it is highly susceptible to misalignment, scraping, or even jamming during removal and insertion, leading to mechanical damage to the armature, stator windings, core, and other expensive components. Such damage not only causes installation difficulties but can also lead to significant safety hazards during unit operation, such as excessive vibration and insulation failure. Therefore, a set of specialized tools and precise methods are required to ensure safe, accurate, and efficient armature removal and insertion.

[0003] To address the aforementioned issues, several auxiliary piercing devices have emerged in the prior art. For example, one existing piercing auxiliary scheme employs an internal central shaft guide. This scheme primarily involves connecting a coaxial central shaft to the bottom wall of the rotor bore and mounting a slider with a support on the shaft. The support abuts against the inner wall, thus providing internal guidance during piercing. However, this scheme has significant drawbacks in practical applications: its central shaft is only fixed at one end to the bottom wall of the bore, essentially constituting a single-end fixed cantilever beam structure. When bearing the weight of the piercing component, which can reach several tons, the cantilever beam is highly susceptible to downward bending deformation. This deformation causes the guide shaft to lose its original coaxiality, significantly reducing piercing accuracy and still posing a risk of scratching the windings.

[0004] Another existing solution is to use a lifting-type extraction tool. This solution uses an external overhead crane or hoist, combined with a dedicated lifting device, to suspend and pull the extraction component, with an internal anti-collision guide tube. However, the drawback of this solution is that multi-degree-of-freedom adjustment is extremely difficult. Because the extraction component is in a flexible suspended state, it is difficult for operators to make millimeter-level adjustments to its vertical, horizontal, and pitch / yaw movements in three-dimensional space. In a narrow space with gaps of only a few millimeters, relying solely on the rough traction of a crane makes it extremely difficult to achieve precise alignment, resulting in not only laborious extraction but also a high risk of equipment collision due to loss of control.

[0005] In summary, current piercing auxiliary tools suffer from problems such as large deformation under load and low guiding accuracy (e.g., cantilever beam guiding method), or difficulty in fine-tuning the attitude in the suspended state and the need for manual experience for alignment (e.g., lifting device traction method).

[0006] Therefore, there is an urgent need in the field for a pull-through device that can provide stable bottom support and has high-precision adjustment capabilities with multiple degrees of freedom, so as to solve the technical problems of difficult alignment, laborious pull-through, and easy damage to equipment in the pull-through operation of exciter armature. Summary of the Invention

[0007] To address or improve upon the problems of difficulty in multi-degree-of-freedom adjustment, large structural deformation, and low precision during the armature removal operation of exciter in existing technologies, this application provides a six-degree-of-freedom exciter armature removal device. This device not only achieves high-precision six-degree-of-freedom adjustment but also provides stable bottom rigid support to overcome the deformation defects of traditional cantilever beams. Furthermore, it enables overall support and hoisting of the armature before and after the operation, effectively improving the safety and efficiency of the removal operation.

[0008] In view of this, this application provides a six-degree-of-freedom exciter armature pull-out device, which includes a frame and a lower device, a middle device and an upper device arranged sequentially from bottom to top on the frame base plate. The bottom of the frame is equipped with multiple adjustable legs, which can extend to the same or different lengths in the vertical direction; The lower device is rotatably connected to the frame base plate, and the rotation axis of the lower device is parallel to the normal direction of the frame base plate; the frame is equipped with a rotation adjustment device, which is used to adjust the relative angle between the lower device and the frame; the upper surface of the lower device is equipped with a lower guide device. The middle device is connected to the lower guide device. The middle device can move along the lower guide device. The middle guide device is provided on the upper surface of the middle device. The extension direction of the middle guide device is perpendicular to the extension direction of the lower guide device. The upper device is connected to the middle guide device. The upper device can move along the middle guide device. The top of the upper device is equipped with a roller assembly. The rotation axis of each roller in the roller assembly is parallel to the extension direction of the middle guide device. The upper device is equipped with an upwardly extending column, and a cursor is installed at the end of the column. The cursor is used to project an alignment indicator onto the armature end face.

[0009] Optionally, the roller assembly includes an active roller assembly and a passive roller assembly; In this assembly, each roller in the drive roller group is coaxially connected via a drive shaft; The active roller assembly is connected to the drive unit, which includes a hand-cranked reducer.

[0010] Optionally, each roller in the active roller assembly also includes a roller shaft, and a hand-cranked reducer is installed at the end of the roller shaft of one of the active rollers in the active roller assembly. The hand-cranked reducer is used to drive the roller shaft to rotate.

[0011] Preferably, the hand-cranked reducer is a worm gear reducer to achieve self-locking.

[0012] Optionally, the lower device has a central shaft at its geometric center, and the frame has a central hole at its geometric center. The lower device is rotatably connected to the frame through the shaft hole.

[0013] Optionally, the upper surface of the frame base plate is provided with an annular track, and the bottom of the lower device is provided with a first slider, which slides on the annular track. The slewing adjustment device includes a set screw, the rotation of which drives the lower device to rotate around the central axis along a circular track, thereby adjusting the relative angle between the lower device and the frame base plate.

[0014] Optionally, the lower guide device includes two lower guide rails arranged parallel to each other, and the lower surface of the middle device is provided with four second sliders. Each pair of second sliders slides into contact with one of the lower guide rails, and the lower device and the middle device are slidably connected through the guide rail sliders.

[0015] Optionally, the lower device is provided with a first threaded hole, the axis of which is parallel to the extension direction of the lower guide rail; the middle device is rotatably connected to a first screw, which is threadedly engaged with the first threaded hole; the rotation of the first screw can drive the middle device to move relative to the lower device along the extension direction of the lower guide rail.

[0016] Optionally, the central guide device includes two central guide rails arranged parallel to each other, and the lower surface of the upper device is provided with four third sliders. Each pair of third sliders slides into one of the central guide rails, and the central device and the upper device are slidably connected through the guide rail sliders.

[0017] Optionally, the middle device is provided with a second threaded hole, the axis of which is parallel to the extension direction of the middle guide rail; the upper device is rotatably connected to a second screw, which is threadedly engaged with the second threaded hole; the rotation of the second screw can drive the upper device to move relative to the middle device along the extension direction of the middle guide rail.

[0018] Optionally, the number of adjustable feet is four, and the four adjustable feet are set at the four corners of the frame base plate. Each adjustable foot includes a spoke-type force sensor and a foot screw. The spoke-type force sensor has a recess in the center, and the lower end of the foot screw has a ball head that abuts against the recess. Each adjustable foot also includes an anti-detachment component, which is fixed to the spoke-type force sensor and is positioned above the ball head to prevent the ball head from coming out of the recess.

[0019] Optionally, the armature pull-out device for the six-degree-of-freedom exciter also includes a clamp; Bolt fixing plates are provided on both sides of the top of the frame. The two ends of the clamp are fixed to the bolt fixing plates on both sides of the frame. The clamp is used to lock and fix the armature to the armature pull-out device of the six-degree-of-freedom exciter.

[0020] In summary, this application solves the problems of large load-bearing deformation and difficulty in fine-tuning the traction posture of traditional cantilever beams by stacking lower, middle, and upper devices on the frame from bottom to top, and by using adjustable supports and rotation adjustment devices. It achieves stable rigid support at the bottom and high-precision six-degree-of-freedom posture adjustment of the armature in a confined space, effectively avoiding equipment scratches during the insertion process. By setting a roller group with the rotation axis parallel to the insertion direction at the top of the upper device, it solves the problems of difficulty in aligning armature bolt holes and easy surface friction damage. By setting a cursor instrument at the end of the column at the front end of the upper device, it solves the problem of manual alignment based on experience and time-consuming in the early stage of insertion, realizes intuitive visual alignment indication, shortens the initial alignment time, and improves the efficiency of maintenance operations. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0022] Figure 1 This paper shows a schematic diagram of the overall structure of the six-degree-of-freedom exciter armature shunt device provided in this application; Figure 2 This paper shows a schematic diagram of the frame of the six-degree-of-freedom exciter armature shunt device provided in this application; Figure 3 This paper shows a schematic diagram of the adjustable support legs of the six-degree-of-freedom exciter armature withdrawal device provided in this application; Figure 4 This paper shows a schematic diagram of the lower part of the six-degree-of-freedom exciter armature pull-out device provided in this application; Figure 5 A bottom view of the lower part of the six-degree-of-freedom exciter armature pull-out device provided in this application is shown; Figure 6 This paper shows a schematic diagram of the structure of the middle part of the six-degree-of-freedom exciter armature pull-out device provided in this application; Figure 7 This invention provides a schematic diagram of the adjusting screw assembly of the middle part of the six-degree-of-freedom exciter armature pull-out device. Figure 8 This paper shows a schematic diagram of the upper part of the six-degree-of-freedom exciter armature shunt device provided in this application; Figure 9 This paper shows a schematic diagram of the upper part of the six-degree-of-freedom exciter armature shunt device provided in this application; Figure 10 A cross-sectional view of the roller drive device of the six-degree-of-freedom exciter armature pull-out device provided in this application is shown; The image is labeled as follows: 1: Framework; 11: Frame base plate; 110: Adjustable support foot; 1101: Support foot plate; 1102: Wheel spoke type force sensor; 1103: Recessed seat; 1104: Anti-detachment plate; 1105: Support foot screw; 111: Rotation adjustment device; 112: Circular track; 113: Center hole copper sleeve; 114: Screw sleeve. 12: Bracket; 120: Bolt fixing plate; 121: Lifting lug; 2: Lower device; 21: Lower base plate; 210: Lower guide rail; 211: First slider; 212: Central shaft; 213: First ear plate; 3: Central device; 31: Middle base plate, 310: Middle guide rail, 311: Second slider, 312: Second ear plate, 313: Adjusting screw assembly, 3131: First screw, 3132: Ear plate, 3133: Screw copper sleeve, 3134: Pin; 4: Upper device; 41: Upper device base; 42: Drive roller assembly; 420: Drive roller; 421: Roller shaft; 422: Key; 423: Bearing; 424: Pressure cap; 43: Passive roller assembly; 44: Hand-cranked reducer; 45: Drive shaft; 46: Optical cursor; 47: Third slider; 5: Hoop. Detailed Implementation

[0023] In the following description, numerous specific details are set forth for illustrative purposes in order to provide a thorough understanding of the various exemplary embodiments of this disclosure. As used herein, “implementation” is a non-limiting example of an apparatus or method employing one or more inventive concepts disclosed herein. However, it will be apparent that the various exemplary embodiments may be implemented without these specific details or with one or more equivalent configurations. Furthermore, the exemplary embodiments may be different, but not necessarily exclusive. For example, specific features of other exemplary embodiments may be used or implemented in some exemplary embodiments without departing from the concept of this disclosure.

[0024] Unless otherwise stated, the exemplary embodiments described are to be understood as exemplary features providing details of variations in some ways in which the concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, features, components, modules, regions and / or aspects of the various embodiments may be combined, separated, interchanged and / or reconfigured without departing from the concepts of this disclosure.

[0025] Although terms such as “first” and “second” may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the teachings of this disclosure, the first element discussed below may be referred to as the second element.

[0026] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms “a” or “the” are intended to also include the plural forms unless the context clearly indicates otherwise. Furthermore, when used in this specification, the terms “comprising” and / or “including” mean the presence of the stated features, steps, operations, elements, components, and / or groups thereof, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0027] Unless otherwise specified, all terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms such as those defined in common dictionaries shall be interpreted as having meanings consistent with their meanings in the context of the relevant field and shall not be interpreted in an idealized or overly formal sense, unless expressly defined herein.

[0028] Various embodiments of the present disclosure will now be described more fully below with reference to the accompanying drawings. However, the present disclosure may be implemented in many different ways and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the disclosure will be exhaustive and complete, and will fully convey the scope of the disclosure to those skilled in the art. The same reference numerals denote the same parts throughout the drawings. Furthermore, in the drawings, parts are not necessarily drawn to scale for clarity, and the scale and dimensions of parts may be enlarged.

[0029] To facilitate the description of the orientation of this device structure, this embodiment introduces an xyz spatial rectangular coordinate system, whose initial position is as follows: Figure 1 As shown, as the device in this embodiment moves, the x-axis is always horizontal and parallel to the lower guide rail, the y-axis is always horizontal and parallel to the middle guide rail, and the z-axis is vertical. Therefore, the spatial rectangular coordinate system in this embodiment is not static, but dynamically changes with the movement of the device in this embodiment.

[0030] At least to solve or improve the problems of difficulty in multi-degree-of-freedom adjustment, large structural deformation, and low precision in the aforementioned existing technologies, such as Figure 1 and Figure 2 As shown, this embodiment provides a six-degree-of-freedom exciter armature pull-out device, which includes at least a frame 1, a lower device 2, a middle device 3 and an upper device 4 arranged sequentially from bottom to top on the frame base plate 11.

[0031] Specifically, the bottom of the frame base plate 11 is provided with multiple adjustable legs 110, and the multiple adjustable legs 110 can extend to the same or different lengths in the vertical direction; The lower device 2 is rotatably connected to the frame base plate 11, and the rotation axis of the lower device 2 is parallel to the normal direction of the frame base plate 11; the frame 1 is provided with a rotation adjustment device 111, which is used to adjust the relative angle between the lower device 2 and the frame 1; the upper surface of the lower device 2 is provided with a lower guide device. The middle device 3 is connected to the lower guide device. The middle device 3 can move along the lower guide device. The middle guide device is provided on the upper surface of the middle device 3. The extension direction of the middle guide device is perpendicular to the extension direction of the lower guide device. The upper device 4 is connected to the middle guide device. The upper device 4 can move along the middle guide device. The top of the upper device 4 is provided with a roller group. The rotation axis of each roller in the roller group is parallel to the extension direction of the middle guide device. The upper device 4 is provided with an upwardly extending column, and a cursor 46 is provided at the end of the column. The cursor 46 is used to project an alignment indicator onto the armature end face.

[0032] Based on the above structure, the armature pull-through device provided in this embodiment can achieve precise six-degree-of-freedom adjustment during armature pull-through operations. The specific adjustment method is as follows: By adjusting the extension lengths of multiple adjustable legs 110 to be consistent or different, the device can move along the z-axis and rotate around the x-axis. Specifically, when the extension lengths of multiple adjustable legs 110 are synchronously adjusted to be consistent, the entire pull-out device can move up and down along the z-axis. When the extension lengths of multiple adjustable legs 110 are different, the specific adjustment method can be, taking the four adjustable legs in this embodiment as an example, dividing the four adjustable legs into two groups, each group containing two adjustable legs whose connecting lines are parallel to the x-axis direction; the extension lengths of the two adjustable legs in the same group can be adjusted to be consistent, and the extension lengths of the two groups of adjustable legs can be adjusted to be inconsistent, so that the frame base plate and the device above can be deflected around the x-axis direction to adapt to the pitch angle alignment requirements during armature pull-out. By driving the lower device 2 to rotate relative to the frame 1 through the rotary adjustment device 111, the rotation of the lower device 2 and the upper load-bearing structure around the z-axis can be realized. The middle device 3 is moved along the x-axis by sliding connection between the middle device 3 and the lower device 2. The upper device 4 and the middle device 3 are connected by a sliding fit, which enables the upper device 4 to move along the y-axis. The roller group provided on the top of the upper device 4 can drive the armature on it to rotate around the y-axis, which facilitates the alignment of the armature bolt holes. In addition, during the aforementioned multi-degree-of-freedom adjustment process, the centering and positioning are performed in conjunction with the cursor instrument 46 installed on the upper device 4, which greatly improves the positioning accuracy and work efficiency.

[0033] It should be noted that, in order to visually demonstrate the working status of this device, Figure 1 The armature to be pulled out is schematically drawn using dotted lines. Furthermore, as... Figure 1 As shown, the six-degree-of-freedom exciter armature pull-out device of this embodiment also includes a clamp 5, which serves as an auxiliary fixing component of the device. The main body is made of steel strip, and the two ends are steel plates with bolt holes. In use, the clamp covers and fits the outer cylindrical surface of the armature from above, and its two ends are fixed to the frame 1 by bolts to effectively prevent the exciter armature from rolling or falling off during operation or hoisting.

[0034] The following provides a detailed description of the components and working principle of the six-degree-of-freedom exciter armature pull-out device provided in this application.

[0035] like Figure 2 As shown, frame 1 serves as the support base and height / tilt angle adjustment structure for this device. The main body of frame 1 is welded from square tubes and steel plates, and the overall shape is roughly an open rectangle or semi-enclosed shape, forming a semi-open accommodating space for accommodating the lower device 2, the middle device 3, and the upper device 4. Frame 1 includes a frame base plate 11 at the bottom and two supports 12 extending vertically on both sides of the frame base plate 11.

[0036] like Figure 2 and Figure 3As shown, regarding the frame base plate 11, its lower surface has four adjustable feet 110 at its four corners and threaded sleeves 114 for mounting the adjustable feet 110. The adjustable feet 110, from bottom to top, mainly include: a foot plate 1101, a spoke-type force sensor 1102, a recess 1103, an anti-detachment plate 1104, and a foot screw 1105. Specifically, the upper part of the foot screw 1105 of the adjustable feet 110 is screwed into the threaded sleeves 114 at the four corners of the frame base plate 11. The threaded sleeves 114 have internal threads, which cooperate with the foot screw 1105 to form a threaded transmission pair. A ball head is provided at the lower end of the foot screw 1105. This ball head abuts against the recess 1103 at the center of the spoke-type force sensor 1102, forming a ball-and-socket joint, which allows the spoke-type force sensor 1102 to swing in all directions. To prevent the support screw 1105 from being pulled out, two semi-circular anti-detachment discs 1104 are fixed above the spoke-type force sensor 1102 by screws; at the same time, to prevent the spoke-type force sensor 1102 from directly contacting the ground and causing wear, a steel support disc 1101 is fixed below it by screws.

[0037] Based on the aforementioned threaded transmission structure, the extension lengths of multiple adjustable feet 110 can be changed by rotating the foot screw 1105 during use, thereby enabling the device to move along the z-axis and rotate around the x-axis. Specifically, when the extension lengths of the four adjustable feet 110 are synchronously adjusted to be consistent, the entire pull-out device can move smoothly up and down along the z-axis. When pitch angle adjustment is required, the four adjustable feet can be divided into two groups: the two front feet form one group, and the two rear feet form another group. Each group contains two adjustable feet whose connecting line is parallel to the x-axis, ensuring that the extension lengths of the two adjustable feet within the same group are consistent, and that the extension lengths between the two groups are not adjusted to be inconsistent. This drives the frame base plate and the entire device above to deflect around the x-axis to meet the alignment requirements during armature pull-out.

[0038] Furthermore, during the aforementioned adjustment and lifting process, the spoke-type force sensor 1102 used in this embodiment can monitor and display the weight of the entire machine along with the armature in real time. When the number displayed by the force sensor is close to or slightly exceeds the armature mass, it can be considered that the mass of the armature is fully or mostly supported by this device, so as to facilitate the subsequent safe loosening of the armature fixing bolts.

[0039] like Figure 2As shown, the upper surface of the frame base plate 11 is provided with a rotation adjustment device 111 and an annular track 112; specifically, the annular track 112 provides a flat sliding guide surface for supporting the first slider of the lower device 2, distributing the heavy load above evenly to the frame 1, ensuring smooth rotation and preventing overturning; the rotation adjustment device 111 includes a retractable set screw mechanism, one end of which abuts against the lower device 2, providing thrust through threaded transmission to drive the lower device 2 to rotate around the z-axis. At the same time, a central hole is opened in the center of the frame base plate 11, and a copper sleeve 113 is installed inside the central hole. The central shaft 212 of the lower device 2 is inserted into the copper sleeve 113 to form a hole-shaft fit to provide radial rotation limit. The copper sleeve 113 plays the role of reducing the wear of the central shaft 212. like Figure 2 As shown, the support 12 mounted on the frame base plate 11 includes two column structures located on both sides of the frame base plate 11 and extending vertically upwards. Each support 12 has a bolt fixing plate 120 and a lifting lug 121 at its top. The bolt fixing plate 120 is used to lock and fix the armature in conjunction with the clamp 5. When the armature is placed in this pull-out device, the clamp 5 is wrapped around from above and tightly fitted to the outer surface of the armature. Its two ends are fixed to the bolt fixing plates 120 on both sides by bolts, forming a closed-loop locking, effectively preventing the armature from rolling or falling off during pull-out or movement. Simultaneously, the supports 12 on both sides, as the overall external load-bearing frame, can directly transfer the lifting load to the frame base plate 11, avoiding direct application of lifting force to the internal guide rails, sliders, and screws, and other precision adjustment mechanisms. By connecting the lifting lugs 121 on both sides with lifting equipment, the entire device and armature can be safely and smoothly lifted, while preventing deformation and damage to precision components due to tension.

[0040] like Figure 1 As shown, the lower device 2 is positioned above the frame 1, and its main body is a lower base plate 21 made of steel plate. The lower device 2 can rotate relative to the frame 1 along the z-axis. Specifically, as... Figure 4 As shown, a central shaft 212 is provided downward at the geometric center of the lower surface of the lower base plate 21. This central shaft 212 is inserted into the central hole copper sleeve 113 of the central hole of the frame base plate 11, forming a rotatable connection with a hole-shaft fit. Furthermore, as... Figure 5 As shown, the lower base plate 21 is also provided with four first sliders 211 evenly distributed around the circumference of the annular track 112 on its lower surface. The first sliders 211 are mounted on the annular track 112 of the frame 1 and can slide along the annular track 112, thereby evenly distributing the load above to the frame 1 and ensuring smooth rotation. In use, by rotating the set screw of the rotation adjustment device 111 on the frame 1, the lower device 2 can be driven to rotate around its geometric center relative to the frame structure 1 in the z-axis direction.

[0041] like Figure 4As shown, two lower guide rails 210, which are parallel to each other and extend along the x-axis, are installed on the upper surface of the lower base plate 21. As a lower guide device, they provide translational movement guidance for the middle device along the x-axis.

[0042] Furthermore, a first ear plate 213 is welded to the side (yz plane) of the lower device base plate 21, and a first threaded hole is formed inside the ear plate 21. The axis of the first threaded hole is parallel to the extension direction (x-axis direction) of the lower guide rail 210, and is used to engage with the screw thread on the middle device 3. When the screw is rotated, the middle device 3 can be driven to translate relative to the lower device 2 in the x-axis direction.

[0043] like Figure 6 As shown, the middle device 3 is located above the lower device 2. Its main body is a middle base plate 31 made of steel plate. Four second sliders 311 are provided on its lower surface. Every two second sliders 311 slide in cooperation with the lower guide rail 210 on the upper surface of the lower device 2, so that the middle device 3 can move horizontally along the extension direction of the lower guide rail 210, that is, the x-axis direction.

[0044] To achieve precise translational movement, an adjusting screw assembly 313 is installed on the side (yz plane) of the central device 3. Specifically, as shown... Figure 7 As shown, the adjusting screw assembly 313 includes a first screw 3131 with a hexagonal end, an ear plate 3132, a screw sleeve 3133, and a pin 3134. One end of the first screw 3131 has an annular groove, in which the split-type screw sleeve 3133 is fitted. The split-type ear plate 3132 covers the groove outside the screw sleeve 3133 to prevent it from falling out, and the two ear plates 3132 are fixed by fasteners. The entire adjusting screw assembly 313 is hinged to the ear seat on the side of the base plate 31 of the middle device via the pin 3134. The other end of the first screw 3131 passes through and is threaded into the first threaded hole of the lower device 2. In use, the operator rotates the first screw 3131, and the axial force generated by the threaded transmission pair drives the middle device 3 to move smoothly relative to the lower device 2 along the x-axis.

[0045] like Figure 6 As shown, in this embodiment, two central guide rails 310, which are parallel to each other and extend along the y-axis, are installed on the upper surface of the central base plate 31. As a central guide device, they provide translational movement guidance for the upper device along the y-axis.

[0046] In addition, such as Figure 6 As shown, a second ear plate 312 is welded to the other side (xz plane) of the central base plate 31, and a second threaded hole is provided inside it. The axis of the second threaded hole is parallel to the extension direction (y-axis direction) of the central guide rail 310.

[0047] like Figure 1 As shown, the upper device 4 is positioned above the middle device 3, and the upper device 4 directly supports the exciter armature. Figure 9 As shown, the lower surface of the upper device base 41 is provided with four third sliders 47, wherein every two third sliders 47 are slidably engaged with a central guide rail 310. To achieve translational movement, as... Figure 8 As shown, an adjusting screw assembly is also hinged to the side (xz plane) of the upper device base 41. The structure of this adjusting screw assembly is basically the same as that of the aforementioned adjusting screw assembly 313. During installation, the mounting axes of the two are arranged perpendicularly. This adjusting screw assembly includes a second screw. One end of the second screw is axially limited and rotatably connected to the upper device base 41, and the other end passes through and threadedly engages with the second threaded hole of the second ear plate 312 of the middle base plate 31. In use, the operator rotates the second screw, and the axial force generated by the threaded transmission pair drives the upper device 4 to move smoothly relative to the middle device 3 along the y-axis.

[0048] like Figure 8 As shown, the upper surface of the upper device base 41 projects onto the xz plane in an upward-opening concave shape. Roller sets are respectively provided at both ends of the concave shape to directly support the outer cylindrical surface of the armature. Specifically, the upper device has two sets of roller sets: a set of active rollers 42 and a set of passive rollers 43. The active roller set 42 includes two active rollers 420, and the passive roller set 43 includes two passive rollers. The rotation axis of each roller in all roller sets is parallel to the extension direction (y-axis direction) of the central guide rail 310. To prevent scratch damage to the armature surface of the exciter, the rollers of both the active roller set 42 and the passive roller set 43 are preferably made of non-metallic materials or copper alloys.

[0049] Combination Figure 8 and Figure 10 The rolling drive system in this embodiment mainly consists of a drive roller assembly 42, a drive shaft 45, and a hand-cranked reducer 44. The drive roller assembly 42 mainly comprises a drive roller 420, a roller shaft 421, a key 422, a bearing 423, and a pressure cap 424. The drive roller 420 is sleeved on the outside of the roller shaft 421, and the two are connected by the key 422 to transmit torque; the bearing 423 is mounted on the roller shaft 421 and fixed in the bearing seat of the upper device base 41 by the pressure cap 424. The roller shafts 421 of the two drive roller assemblies 42 are coaxially connected by the drive shaft 45 to ensure synchronous rotation.

[0050] like Figure 10As shown, a hand-cranked reducer 44 is installed at the end of the roller shaft 421 of one of the drive roller groups 42, serving as a drive device. In use, the operator cranks the input end of the hand-cranked reducer 44, driving the roller shaft 421 to rotate, which in turn achieves synchronous rotation of the two drive roller groups 42 via the transmission shaft 45. Since the armature is supported on the rollers, the rotation of the drive rollers will cause the armature to rotate slightly around the y-axis through friction. This design facilitates precise alignment of the armature fixing bolt holes during shaft insertion operations. Preferably, the hand-cranked reducer 44 is a worm gear reducer. Utilizing the self-locking characteristic of the worm gear mechanism, it can prevent the armature from accidentally reversing under gravitational eccentricity, ensuring operational safety. Figure 8 As shown, the overall structure of the passive roller assembly 43 is basically the same as that of the active roller assembly 42. The difference is that the passive roller assembly 43 has no power input mechanism, and its rollers only provide free rotation support when the armature rotates.

[0051] like Figure 8 As shown, the upper device 4 has an upwardly extending column at its front end, and a cursor device 46 is installed at the end of the column. In the initial stage of the insertion operation, the cursor device 46 is used to project a crosshair or other centering indicator onto the armature end face, assisting the operator to quickly align the y-axis of the device roughly with the theoretical axis of the armature, thus shortening the initial alignment time.

[0052] Taking the extraction of the exciter armature as an example, the operation steps of this application are as follows: First, adjust the adjustable support leg 110 to the shortest extension height, pre-adjust the rotation angle of the lower device 2 and the x-axis translation of the middle device 3 to the middle position, and move the upper device 4 to the end away from the exciter. Then, the entire insertion device is hoisted to the front end of the armature. Using the crosshair of the cursor instrument 46 for coarse centering, the y-axis of the insertion device is roughly aligned with the armature axis, and the center of the cursor should be roughly directly below the armature axis. Next, the device is translated along the x-axis by alternating the screws of the adjusting screw group of the middle device. The rotational freedom of the extraction device around the z-axis is adjusted by rotating the set screw of the rotary adjusting device. The adjustable feet are adjusted in groups to achieve pitch around the x-axis and rise and fall along the z-axis, so that the roller group of the upper device contacts the outer surface of the armature. Simultaneously, the adjustable feet 110 are raised, and the display value of the spoke force sensor is observed. When the display value is close to or slightly exceeds the weight of the armature, it is confirmed that the mass of the armature is fully or mostly supported by the device. At this time, the fixing bolts can be loosened, the screws of the adjusting screw group of the upper device can be rotated, and the armature can be smoothly extracted along the y-axis. After extraction, take the clamp 5 and wrap it around the outer surface of the armature from above to make it fit tightly. Then, fasten the two ends of the clamp 5 to the bolt fixing plates 120 on both sides of the frame 1 with bolts to form a closed loop lock. Finally, connect the hook of the lifting equipment to the lifting lug 121 at the top of the frame 1, and safely lift the device together with the locked armature as a whole to the designated storage location.

[0053] The shaft insertion operation is carried out in reverse order of the above process; after the armature is fed into the stator bore, the hand-cranked reducer can be cranked to drive the drive roller assembly to rotate the armature around the y-axis, and the worm gear self-locking property is used to safely align the bolt hole.

[0054] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application.

[0055] The above are merely some specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A six-degree-of-freedom exciter armature extraction device, characterized in that, It includes a frame (1), and a lower device (2), a middle device (3) and an upper device (4) arranged sequentially from bottom to top on the frame base plate (11). The frame (1) has multiple adjustable legs (110) at the bottom, and the multiple adjustable legs (110) can extend to the same or different lengths in the vertical direction; The lower device (2) is rotatably connected to the frame base plate (11), and the rotation axis of the lower device (2) is parallel to the normal direction of the frame base plate; the frame (1) is provided with a rotation adjustment device (111), which is used to adjust the relative angle between the lower device (2) and the frame base plate (11); the upper surface of the lower device (2) is provided with a lower guide device; The middle device (3) is connected to the lower guide device. The middle device (3) can move along the lower guide device. The middle guide device is provided on the upper surface of the middle device (3). The extension direction of the middle guide device is perpendicular to the extension direction of the lower guide device. The upper device (4) is connected to the middle guide device. The upper device (4) can move along the middle guide device. The top of the upper device (4) is provided with a roller group. The rotation axis of each roller in the roller group is parallel to the extension direction of the middle guide device. The upper device (4) is provided with an upwardly extending column, and a cursor (46) is provided at the end of the column. The cursor (46) is used to project an alignment indication onto the armature end face.

2. The armature extraction device for a six-degree-of-freedom exciter according to claim 1, characterized in that, The roller assembly includes an active roller assembly (42) and a passive roller assembly (43). In this configuration, each roller in the active roller assembly (42) is coaxially connected via a drive shaft (45); The active roller assembly (42) is connected to a drive device, which includes a hand-cranked reducer (44).

3. The armature extraction device for a six-degree-of-freedom exciter according to claim 2, characterized in that, Each roller in the active roller assembly (42) also includes a roller shaft (421). The hand-cranked reducer (44) is installed at the end of the roller shaft (421) of one of the active rollers in the active roller assembly (42). The hand-cranked reducer (44) is used to drive the roller shaft (421) to rotate.

4. The armature extraction device for a six-degree-of-freedom exciter according to any one of claims 2 or 3, characterized in that, The hand-cranked reducer (44) is a worm gear reducer to achieve self-locking.

5. The armature extraction device for a six-degree-of-freedom exciter according to claim 1, characterized in that, The lower device (2) has a central shaft (212) at its geometric center, and the frame (1) has a central hole at its geometric center. The lower device (2) is rotatably connected to the frame (1) through the shaft hole.

6. The armature extraction device for a six-degree-of-freedom exciter according to claim 5, characterized in that, The upper surface of the frame base plate is provided with an annular track (112), and the bottom of the lower device (2) is provided with a first slider (211), which slides on the annular track (112). The rotary adjustment device (111) includes a set screw, the rotation of which can drive the lower device (2) to rotate around the central axis (212) along the annular track (112) to adjust the relative angle between the lower device (2) and the frame base plate (11).

7. The armature extraction device for a six-degree-of-freedom exciter according to claim 1, characterized in that, The lower guide device includes two lower guide rails (210) arranged parallel to each other. The lower surface of the middle device (3) is provided with four second sliders (311). Each pair of second sliders slides into one of the lower guide rails. The lower device (2) and the middle device (3) are slidably connected by the guide rail sliders.

8. The armature extraction device for a six-degree-of-freedom exciter according to claim 7, characterized in that, The lower device (2) is provided with a first threaded hole, the axis of which is parallel to the extension direction of the lower guide rail; the middle device (3) is rotatably connected to a first screw, which is threadedly engaged with the first threaded hole; the rotation of the first screw can drive the middle device (3) to move relative to the lower device (2) along the extension direction of the lower guide rail (210).

9. The armature extraction device for a six-degree-of-freedom exciter according to claim 1, characterized in that, The central guide device includes two central guide rails (310) arranged parallel to each other. The lower surface of the upper device (4) is provided with four third sliders (47). Each pair of third sliders (47) slides with one of the central guide rails. The central device (3) and the upper device (4) are slidably connected by the guide rail sliders.

10. The armature extraction device for a six-degree-of-freedom exciter according to claim 9, characterized in that, The middle device (3) is provided with a second threaded hole, the axis of which is parallel to the extension direction of the middle guide rail; the upper device (4) is rotatably connected to a second screw, which is threadedly engaged with the second threaded hole; the rotation of the second screw can drive the upper device (4) to move relative to the middle device (3) along the extension direction of the middle guide rail (310).

11. The armature extraction device for a six-degree-of-freedom exciter according to claim 1, characterized in that, The number of adjustable feet (110) is four. The four adjustable feet (110) are set at the four corners of the frame base plate. Each adjustable foot (110) includes a spoke-type force sensor (1102) and a foot screw (1105). The spoke-type force sensor (1102) has a recess (1103) at its center. The lower end of the foot screw (1105) has a ball head, which abuts against the recess (1103). Each adjustable foot (110) also includes an anti-detachment component, which is fixed to the spoke-type force sensor (1102) and is positioned above the ball head to prevent the ball head from coming out of the recess (1103).

12. The armature extraction device for a six-degree-of-freedom exciter according to claim 1, characterized in that, The six-degree-of-freedom exciter armature pull-out device also includes a clamp (5). The top two sides of the frame (1) are respectively provided with bolt fixing plates (120), and the two ends of the clamp (5) are respectively fixed on the bolt fixing plates on both sides of the frame (1). The clamp (5) is used to lock the armature to the armature pull-out device of the six-degree-of-freedom exciter.

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