Shafting structure and wind turbine generator system

Abstract

The application discloses a shaft system structure and a wind turbine generator unit, and relates to the technical field of wind turbine generator units. The shaft system structure comprises a shaft assembly and a locking assembly. The shaft assembly comprises a rotatingly matched movable shaft and a fixed shaft. The movable shaft comprises a first shaft body and a locking disc coaxially arranged on the first shaft body. The locking disc is provided with an insertion slot extending along the axial direction of the shaft assembly by a predetermined depth. The insertion slot is arranged on the outer circumferential surface of the locking disc. The locking assembly is arranged on the shaft assembly. The locking assembly comprises a locking piece. The locking piece is arranged on the fixed shaft. At least part of the locking piece can be inserted into the insertion slot to lock the relative position of the movable shaft and the fixed shaft. The application can reduce the outer diameter of the locking disc on the basis of ensuring the locking function.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, specifically to a shaft system structure and a wind turbine generator set. Background Technology

[0002] A wind turbine is a large-scale power generation device that converts wind energy into electrical energy through the rotation of its rotor. During the assembly, commissioning, and maintenance of wind turbines, the rotor must be locked to ensure the safety of operators and prevent injury from rotor rotation. Currently, rotor locking is often achieved by locking the shaft connected to the rotor. However, as the capacity of the turbine increases, the rotor locking radius also increases accordingly, leading to the problem of an excessively large shaft locking disc. Summary of the Invention

[0003] This invention provides a shaft system structure and a wind turbine generator set that can reduce the outer diameter of the moving shaft locking disc.

[0004] In a first aspect, embodiments of the present invention provide a shaft system structure, the shaft system structure comprising: a shaft assembly including a rotating shaft and a fixed shaft, the rotating shaft including a first shaft body and a locking disc coaxially disposed with the first shaft body, the locking disc having an insertion groove extending a predetermined depth along the axial direction of the shaft assembly, the insertion groove being disposed on the outer peripheral surface of the locking disc; and a locking assembly disposed on the shaft assembly, the locking assembly including a locking member disposed on the fixed shaft, at least a portion of the locking member being capable of extending into the insertion groove to lock the relative position of the rotating shaft and the fixed shaft.

[0005] According to the foregoing embodiment of the first aspect of the present invention, the locking assembly further includes a locking sleeve, the locking sleeve comprising a cylindrical sleeve body having a locking hole extending along the axial direction, the sleeve body being inserted into the insertion groove, at least a portion of the locking member being able to extend into the locking hole to lock the moving shaft, the locking sleeve protecting the insertion groove and preventing the locking member from directly acting on the insertion groove during the locking process of the moving shaft, thus preventing damage to the locking disc, the locking sleeve having low replacement cost, and improving the maintainability and economy of the shaft system structure.

[0006] According to any of the foregoing embodiments of the first aspect of the present invention, the number of the plug slots is multiple, and the multiple plug slots are spaced apart in the circumferential direction of the shaft assembly. Each plug slot is provided with a locking sleeve, and the locking sleeve is detachably connected to the locking disc. By inserting at least a portion of the locking member into a locking sleeve that is closer to it, the moving shaft can be locked. Locking is more convenient and quick, and the problem of needing to rotate the moving shaft at a large angle when locking can be avoided.

[0007] According to any of the foregoing embodiments of the first aspect of the present invention, the outer diameter of the locking disc satisfies equation (1).

[0008] 2d1≤D1≤2d1+D2 (1)

[0009] Wherein, D1 is the outer diameter of the locking disc, d1 is the distance from the central axis of the locking sleeve to the central axis of the shaft assembly, and D2 is the outer diameter of the sleeve body; this can effectively reduce the outer diameter of the locking disc while ensuring the installation reliability of the locking sleeve.

[0010] According to any of the foregoing embodiments of the first aspect of the present invention, the orthographic projection of the insertion groove in the axial direction is U-shaped, and the bottom shape of the insertion groove is a semi-circle that matches the sleeve body to limit the sleeve body and improve the installation stability and reliability of the locking sleeve. The width of the opening of the insertion groove in the direction perpendicular to the radial direction of the shaft assembly is greater than or equal to the outer diameter of the sleeve body so that the locking sleeve can be moved out of the insertion groove in the radial direction.

[0011] According to any of the foregoing embodiments of the first aspect of the present invention, the sidewall that surrounds the insertion groove is an arc-shaped surface that matches the sleeve body, wherein the central angle of the arc-shaped surface is greater than 180 degrees and less than 360 degrees, which can effectively prevent the sleeve body of the locking sleeve from disengaging from the insertion groove radially and improve the installation reliability of the locking sleeve.

[0012] According to any of the foregoing embodiments of the first aspect of the present invention, the locking sleeve further includes a flange portion connected to one end of the sleeve body. The flange portion is connected to the locking disc by a first fastener. The first fastener extends along the axial direction. The connection between the locking sleeve and the locking disc is achieved by setting the flange portion, which makes installation and disassembly simple and convenient, and the connection reliability is high.

[0013] According to any of the foregoing embodiments of the first aspect of the present invention, the flange portion is located on the side of the locking disc facing away from the locking member, and the sleeve body is provided with the flange portion on both sides in its radial direction. In the circumferential direction of the shaft assembly, the two flange portions are respectively located on both sides of the insertion groove; or, the flange portion is located on the side of the locking disc facing the locking member, and the flange portion is in the form of an annulus surrounding the sleeve body.

[0014] According to any of the foregoing embodiments of the first aspect of the present invention, the sleeve is provided with a through hole extending radially therethrough, and the sleeve is connected to the locking disc by a second fastener, a portion of which is located in the insertion groove and another portion is located in the locking disc, which can solve the problem that the maintenance space of the locking disc facing the impeller is insufficient and cannot be disassembled.

[0015] According to any of the foregoing embodiments of the first aspect of the present invention, the size of the locking hole gradually increases in the axial direction along the direction close to the locking member, and can guide the insertion of the locking member during the locking process.

[0016] According to any of the foregoing embodiments of the first aspect of the present invention, the fixed shaft includes a second shaft body and a locking seat disposed on the outer wall of the second shaft body. The locking seat is provided with a mounting hole extending along the axial direction. The locking assembly further includes a guide sleeve, which is cylindrical and disposed within the mounting hole. The locking member is movably connected to the guide sleeve in the axial direction. The guide sleeve can guide the movement of the locking member and protect the mounting hole, preventing the locking member from directly acting on the mounting hole during the locking of the moving shaft and causing damage to the locking seat. The guide sleeve has low replacement cost and can improve the maintainability and economy of the shaft system structure.

[0017] According to any of the foregoing embodiments of the first aspect of the present invention, the locking seat is provided with a connecting boss on the side of the mounting hole facing away from the locking disc, and the guide sleeve is connected to the connecting boss by a third fastener. The third fastener extends along the axial direction, so that the third fastener is away from the pin of the locking member, which can improve the force on the third fastener and the guide sleeve and improve the installation reliability of the guide sleeve.

[0018] According to any of the foregoing embodiments of the first aspect of the present invention, the locking assembly further includes a driving mechanism connected to the locking member and capable of driving the locking member to move axially. The driving mechanism includes a fixed seat, and in the axial direction, the fixed seat and the guide sleeve are respectively located on both sides of the connecting boss. The third fastener is inserted into the fixed seat and the connecting boss in sequence and then screwed into the end of the guide sleeve. The fixed seat and the guide sleeve are fixed simultaneously by the third fastener, which has high assembly efficiency and can save the use of fasteners.

[0019] Secondly, embodiments of the present invention provide a wind turbine generator set, including the shaft system structure as described in any of the preceding embodiments.

[0020] The shaft system structure and wind turbine generator set provided in this invention include a shaft assembly and a locking assembly. The shaft assembly includes a rotating shaft, a fixed shaft, and bearings. The rotating shaft includes a first shaft body and a locking disc coaxially arranged with the first shaft body. The locking disc is provided with a insertion groove extending a predetermined depth along the axial direction of the shaft assembly. The insertion groove is located on the outer peripheral surface of the locking disc. The locking assembly includes a locking member located on the fixed shaft. At least a portion of the locking member can extend into the insertion groove. By allowing at least a portion of the locking member to extend into the insertion groove, the relative positions of the rotating shaft and the fixed shaft can be locked, thereby locking the rotating shaft and the impeller connected to the rotating shaft. By providing the insertion groove extending a predetermined depth along the axial direction of the shaft assembly on the outer peripheral surface of the locking disc, the outer diameter of the locking disc can be reduced while ensuring the locking function, thereby reducing the size and weight of the rotating shaft and facilitating the transportation of the shaft system structure. Therefore, this application can both achieve the locking function of the rotating shaft and reduce the outer diameter of the locking disc of the rotating shaft. Attached Figure Description

[0021] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0022] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a shaft system structure provided in an embodiment of the present invention;

[0024] Figure 3 This is a side view of a shaft system structure provided in an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Enlarged sectional view along the central AA direction;

[0026] Figure 5 This is a schematic diagram of a shaft system structure provided in another embodiment of the present invention;

[0027] Figure 6 for Figure 5 Enlarged sectional view along the middle BB direction;

[0028] Figure 7 This is a schematic diagram of the shaft system structure provided in another embodiment of the present invention;

[0029] Figure 8 for Figure 7 Enlarged cross-sectional view along the CC direction;

[0030] Figure 9This is a partial structural diagram of a shaft system provided in another embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Tower; 2-Nacelle; 3-Generator; 4-Impeller; 41-Hub; 42-Blade; 5-Shaft structure;

[0033] 100-Moving Shaft;

[0034] 110 - First shaft; 120 - Locking disc; 121 - Insertion slot;

[0035] 200-Fixed Axis;

[0036] 210 - Second shaft; 220 - Locking seat; 221 - Mounting hole; 222 - Connecting boss;

[0037] 300 - Locking element; 310 - Pin body; 320 - Pin head; 330 - Hydraulic chamber; 331 - First chamber; 332 - Second chamber;

[0038] 400 - Locking sleeve; 410 - Sleeve body; 420 - Locking hole; 430 - Flange part;

[0039] 500-Guide sleeve;

[0040] 600 - Drive mechanism; 610 - Fixed base; 620 - Piston rod;

[0041] 700 - Third fastener;

[0042] X - Axial direction; C - Circumferential direction. Detailed Implementation

[0043] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the invention.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0045] To better understand this application, the following will be combined with... Figures 1 to 9 The shaft system structure and wind turbine generator set of the embodiments of this application are described in detail.

[0046] During the assembly, commissioning, and maintenance of wind turbine generator sets, the impeller needs to be locked to ensure the safety of operators. Currently, this is mostly achieved by locking the shaft connected to the impeller. However, as the unit capacity increases, the impeller locking radius also increases accordingly, resulting in an excessively large shaft locking disc. Based on the above problems, this application provides a shaft system structure and wind turbine generator set that can reduce the outer diameter of the moving shaft locking disc.

[0047] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set provided in an embodiment of the present invention.

[0048] The wind turbine generator set provided in this application includes a tower 1 and a wind turbine, with the wind turbine mounted on the top of the tower 1. The wind turbine includes a nacelle 2, a generator 3, and an impeller 4. The impeller 4 includes a hub 41 and blades 42. The hub 41 is connected to the nacelle 2 and the rotor of the generator 3 via a shaft system structure 5. The shaft system structure 5 includes at least a coaxially arranged and rotatably connected moving shaft and a fixed shaft. The fixed shaft is connected to the nacelle 2, and the moving shaft is connected to the impeller 4. When wind power acts on the impeller 4, the impeller 4 drives the rotor of the generator 3 to rotate relative to the stator, thereby achieving the power generation requirements of the wind turbine generator set 3.

[0049] During the assembly, commissioning, and maintenance of the wind turbine generator set 3, to ensure the safety of operators, the impeller 4 can be locked by locking the moving shaft of the shaft system structure 5. Based on this, this application embodiment also provides a shaft system structure 5, which can be used in the wind turbine generator set 3. The shaft system structure 5 can lock the impeller 4 and reduce the outer diameter of the moving shaft locking disc.

[0050] Figure 2This is a schematic diagram of a shaft system structure provided in an embodiment of the present invention; Figure 3 This is a side view of a shaft system structure provided in an embodiment of the present invention; Figure 4 for Figure 3 Enlarged cross-sectional view along the AA direction.

[0051] The shaft system structure 5 provided in this application embodiment includes a shaft assembly and a locking assembly disposed on the shaft assembly. The shaft assembly includes a rotating shaft 100 and a fixed shaft 200 that are rotatably engaged. The rotating shaft 100 includes a first shaft body 110 and a locking disk 120 coaxially disposed with the first shaft body 110. The locking disk 120 is provided with an insertion groove 121 extending a predetermined depth along the axial direction X of the shaft assembly. The insertion groove 121 is disposed on the outer peripheral surface of the locking disk 120 to have an opening on the outer peripheral surface of the locking disk 120. The locking assembly includes a locking member 300 disposed on the fixed shaft 200. At least a portion of the locking member 300 can extend into the insertion groove 121 to lock the relative position of the rotating shaft 100 and the fixed shaft 200.

[0052] According to the shaft structure 5 of the present application embodiment, by having the locking member 300 at least partially extend into the insertion groove 121, the relative position of the moving shaft 100 and the fixed shaft 200 can be locked, thereby realizing the locking of the moving shaft 100 and the impeller connected to the moving shaft 100. The insertion groove 121 is set on the outer peripheral surface of the locking disk 120, so that the outer diameter of the locking disk 120 can be reduced while ensuring the locking function, thereby reducing the size and weight of the moving shaft 100 and facilitating the transportation of the shaft structure 5.

[0053] Understandably, by fully disengaging the locking element 300 from the insertion slot 121, the moving shaft 100 and the impeller can be unlocked. The moving shaft 100 can rotate relative to the fixed shaft 200. When wind force acts on the impeller, the impeller can drive the generator rotor to rotate relative to the stator through the moving shaft 100.

[0054] Optionally, the locking disc 120 may be provided with a plurality of insertion slots 121, which may be spaced apart in the circumferential direction of the shaft assembly. Preferably, the plurality of insertion slots 121 may be evenly spaced in the circumferential direction of the shaft assembly.

[0055] With multiple insertion slots 121 provided on the locking disc 120, when it is necessary to lock the moving shaft 100, at least a portion of the locking member 300 can be inserted into one of the insertion slots 121 that is closest to it, making locking more convenient and quick, and avoiding the problem of needing to rotate the moving shaft 100 at a large angle when locking; in addition, with multiple insertion slots 121 provided on the locking disc 120, the weight of the moving shaft 100 can be further reduced, which facilitates the transportation of the shaft system structure 5.

[0056] This application does not impose specific restrictions on the number of insertion slots 121 or their spacing in the circumferential direction; both can be adjusted according to actual circumstances.

[0057] Optionally, there may be two or more locking elements 300. The multiple locking elements 300 are spaced apart on the circumferential C of the shaft assembly. When it is necessary to lock the moving shaft 100, the multiple locking elements 300 extend into different insertion slots 121, which can improve the locking reliability of the moving shaft 100 and the impeller.

[0058] In some optional embodiments, the shaft structure 5 provided in this application embodiment, in order to facilitate the setting of the locking member 300, the fixed shaft 200 may include a second shaft body 210 and a locking seat 220 disposed on the outer wall of the second shaft body 210. The locking seat 220 is provided with a mounting hole 221 extending along the axial direction X, and the locking member 300 may be disposed in the mounting hole 221.

[0059] Optionally, there are two or more locking elements 300 and two or more locking seats 220, with each locking seat 220 spaced apart on the circumferential C of the shaft assembly, and each locking element 300 is correspondingly provided in a mounting hole 221 of a locking seat 220.

[0060] Please continue to refer to this. Figures 2 to 4 In some optional embodiments, the locking assembly further includes a locking sleeve 400 disposed on the moving shaft 100. The locking sleeve 400 includes a cylindrical sleeve body 410 having a locking hole 420 extending axially X. The sleeve body 410 is inserted into an insertion groove 121, and at least a portion of the locking member 300 can extend into the locking hole 420 to lock the moving shaft 100.

[0061] By inserting the sleeve 410 of the locking sleeve 400 into the insertion groove 121, the insertion groove 121 can be protected, preventing the locking element 300 from directly acting on the insertion groove 121 during the locking process of the moving shaft 100, thus preventing damage to the locking disc 120; and the replacement cost of the locking sleeve 400 is low, so setting the locking sleeve 400 can improve the maintainability and economy of the shaft system structure 5.

[0062] Optionally, the locking sleeve 400 can be detachably connected to the locking disc 120 to facilitate the installation and removal of the locking sleeve 400.

[0063] Optionally, the orthographic projection of the locking hole 420 on the axial X direction can be circular or square, depending on the shape of the locking member 300.

[0064] Optionally, a plurality of insertion slots 121 are provided on the locking disk 120, and each insertion slot 121 is provided with a locking sleeve 400 to protect each insertion slot 121.

[0065] In some alternative embodiments, the outer diameter of the locking disc 120 can satisfy equation (1).

[0066] 2d1≤D1≤2d1+D2 (1)

[0067] Wherein, D1 is the outer diameter of the locking disc 120, d1 is the distance from the central axis of the locking sleeve 400 to the central axis of the shaft assembly, and D2 is the outer diameter of the sleeve body 410.

[0068] By setting the outer diameter of the locking disc 120 to satisfy 2d1≤D1≤2d1+D2, the distance from the outer circumferential surface of the locking disc 120 to the central axis of the shaft assembly is greater than or equal to the distance from the central axis of the sleeve 410 to the central axis of the shaft assembly, and less than or equal to the maximum distance from the outer circumferential surface of the sleeve 410 to the central axis of the shaft assembly. This can effectively reduce the outer diameter of the locking disc 120, and in the radial direction of the shaft assembly, at least half of the sleeve 410 of the locking sleeve 400 is located in the insertion groove 121, which can ensure the installation reliability of the locking sleeve 400.

[0069] The locking sleeve 400 has various specific structures. In some optional embodiments, the locking sleeve 400 further includes a flange 430 connected to one end of the sleeve body 410. The flange 430 can be connected to the locking disc 120 via a first fastener, which extends axially along the X direction. Optionally, the first fastener can be a bolt, stud, etc. Connecting the locking sleeve 400 and the locking disc 120 by providing the flange 430 simplifies installation and disassembly, and ensures high connection reliability.

[0070] Optionally, the flange 430 can be located on the side of the locking disc 120 away from the locking element 300, allowing the flange 430 to be away from the locking element 300. This improves the stress distribution on the first fastener and the locking sleeve 400, and enhances the installation reliability of the locking sleeve 400. Of course, when installing the locking sleeve 400, the flange 430 can also be located on the side of the locking disc 120 away from the locking element 300, allowing personnel to remove the locking sleeve 400 from the locking disc 120 towards the cabin 2 side, which is also within the scope of this application.

[0071] Optionally, the sleeve 410 may be provided with flanges 430 on both sides of its radial direction. On the circumferential direction C of the shaft assembly, the two flanges 430 are located on both sides of the insertion groove 121. This can ensure the reliability of the connection between the locking sleeve 400 and the locking disc 120, and also prevent the flanges 430 of the locking sleeve 400 from protruding from the outer circumferential surface of the locking disc 120, thus affecting the installation space and the transportation of the moving shaft 100.

[0072] In some optional embodiments, the orthographic projection of the insertion groove 121 in the axial direction X can be U-shaped, the bottom shape of the insertion groove 121 can be a semi-circle that matches the sleeve 410, and the width of the opening of the insertion groove 121 in the direction perpendicular to the radial direction of the shaft assembly can be greater than or equal to the outer diameter of the sleeve 410, so that the insertion groove 121 can limit the sleeve 410, improve the installation stability of the locking sleeve 400, and at the same time, the locking sleeve 400 can be moved out of the insertion groove 121 radially. When the locking sleeve 400 is damaged during the operation of the shaft structure 5 and needs to be disassembled and replaced, the locking sleeve 400 can be removed without hoisting the shaft structure 5 to the ground. The disassembly and assembly are simple and convenient, and the maintenance cost is low.

[0073] Figure 5 This is a schematic diagram of a shaft system structure provided in another embodiment of the present invention; Figure 6 for Figure 5 Enlarged cross-sectional view along the BB direction.

[0074] like Figure 5 and Figure 6 As shown, in some alternative embodiments, the sidewall that encloses the insertion groove 121 can also be an arc-shaped surface that matches the sleeve 410. The central angle α of the arc-shaped surface can be greater than 180 degrees and less than 360 degrees to prevent the sleeve 410 of the locking sleeve 400 from disengaging from the insertion groove 121 radially, thereby improving the installation reliability of the locking sleeve 400.

[0075] Optionally, the sidewall that encloses the insertion groove 121 is an arc-shaped surface that matches the sleeve 410. The flange 430 can be located on the side of the locking disc 120 facing the locking element 300, so that when the locking sleeve 400 needs to be replaced or maintained, the staff can remove the locking sleeve 400 from the side of the locking disc 120 facing the nacelle 2, which solves the problem that the maintenance space on the side of the locking disc 120 facing the impeller is insufficient and cannot be disassembled.

[0076] Optionally, the flange 430 may also be annular, surrounding the sleeve 410, to make the manufacturing of the locking sleeve 400 simpler and more convenient.

[0077] Figure 7 This is a schematic diagram of the shaft system structure provided in another embodiment of the present invention; Figure 8 for Figure 7 Enlarged cross-sectional view along the CC direction.

[0078] like Figure 7 and Figure 8As shown, in some alternative embodiments, the locking sleeve 400 may also be cylindrical, i.e., consisting only of a sleeve body 410. To facilitate the connection between the sleeve body 410 and the locking disc 120, a through hole penetrating radially can be provided on the sleeve body 410. The sleeve body 410 is connected to the locking disc 120 by a second fastener. Part of the second fastener is located within the insertion groove 121, and the other part is located within the locking disc 120, making the connection simple and convenient. Optionally, the second fastener can be a bolt, stud, etc.

[0079] The locking sleeve 400, which consists only of the sleeve body 410, is designed so that when the locking sleeve 400 needs to be replaced or maintained, the staff can remove the locking sleeve 400 from the side of the locking plate 120 facing the nacelle 2, thus solving the problem that the maintenance space on the side of the locking plate 120 facing the impeller is insufficient for disassembly.

[0080] It is understandable that when the locking sleeve 400 only includes the sleeve body 410, the orthogonal projection of the insertion groove 121 on the axial X direction can be U-shaped, and the side wall of the insertion groove 121 can also be an arc-shaped surface that matches the sleeve body 410. Both can enable the locking sleeve 400 to be removed from the locking disc 120 towards the cabin 2 side, and both are within the protection scope of this application.

[0081] Figure 9 This is a partial structural diagram of a shaft system provided in another embodiment of the present invention.

[0082] like Figure 9 As shown, in some optional embodiments, the locking assembly may further include a guide sleeve 500, which is cylindrical and disposed within the mounting hole 221, and the locking member 300 is movably connected to the guide sleeve 500 in the axial direction X.

[0083] By setting a guide sleeve 500 in the mounting hole 221 and movably connecting the locking element 300 in the axial direction X within the guide sleeve 500, the movement of the locking element 300 can be better guided. On the other hand, the mounting hole 221 can be protected, preventing the locking element 300 from directly acting on the mounting hole 221 during locking and unlocking, thus preventing damage to the locking seat 220. The guide sleeve 500 has low replacement cost. Therefore, setting a guide sleeve 500 can improve the maintainability and economy of the shaft system structure 5.

[0084] Optionally, multiple locking seats 220 are provided, and each locking seat 220 has a guide sleeve 500 in its mounting hole 221 to protect each mounting hole 221.

[0085] Optionally, the locking element 300 may include a pin 310 and a pin head 320 arranged sequentially in the axial direction X. The pin 310 matches the inner wall of the guide sleeve 500 and is slidably connected to the guide sleeve 500. The pin head 320 is located on the side of the pin 310 facing the locking disc 120. When it is necessary to lock the moving shaft 100, the pin head 320 extends into the locking hole 420.

[0086] Optionally, the dimension of the pin head 320 in the axial direction X gradually decreases in the direction away from the pin body 310, making the pin head 320 tapered. When it is necessary to lock the moving shaft 100 and the impeller, even if the locking member 300 is not fully aligned with the axis of the locking hole 420, the pin head 320 can still be inserted into the locking hole 420.

[0087] Optionally, the locking hole 420 can also be tapered, and the size of the locking hole 420 gradually increases along the direction close to the locking member 300 in the axial direction X. During the locking process, it can guide the insertion of the pin head 320, and after the pin head 320 is fully inserted into the locking hole 420, the pin head 320 and the pin fixing hole can fit better, which can effectively prevent the moving shaft 100 and the impeller from shaking after locking.

[0088] Please continue to refer to this. Figure 9 In some optional embodiments, the locking seat 220 may have a connecting boss 222 on the side of the mounting hole 221 facing away from the locking disc 120, and the guide sleeve 500 may be connected to the connecting boss 222 by a third fastener 700 extending along the axial direction X. Optionally, the third fastener 700 may be a bolt, stud, etc.

[0089] By setting the connection position between the guide sleeve 500 and the locking seat 220 on the side of the mounting hole 221 facing away from the locking disc 120, and by keeping the third fastener 700 away from the pin head 320 of the locking member 300, the stress on the third fastener 700 and the guide sleeve 500 can be improved, thereby increasing the installation reliability of the guide sleeve 500.

[0090] In some optional embodiments, the locking assembly further includes a drive mechanism 600, which is connected to the locking member 300 and capable of driving the locking member 300 to move along the axial direction X. When it is necessary to lock the moving shaft 100, the drive mechanism 600 drives the locking member 300 to move along the axial direction X in a direction close to the locking disc 120, so that at least a portion of the locking member 300 extends into the guide sleeve 500 and gradually extends into the locking hole 420, thereby achieving automatic locking of the moving shaft 100 and the impeller; the drive mechanism 600 drives the locking member 300 to move along the axial direction X in a direction away from the locking disc 120, so that the portion of the locking member 300 extending into the locking hole 420 retracts into the guide sleeve 500, thereby achieving automatic unlocking of the moving shaft 100 and the impeller.

[0091] Optionally, the drive mechanism 600 includes a fixed base 610. In the axial direction X, the fixed base 610 and the guide sleeve 500 can be located on opposite sides of the connecting boss 222. The third fastener 700 passes through the fixed base 610 and the connecting boss 222 in sequence and is then screwed into the end of the guide sleeve 500. The fixed base 610 and the guide sleeve 500 are fixed simultaneously by the third fastener 700, resulting in high assembly efficiency and saving on the use of fasteners.

[0092] There are various types of drive mechanisms 600 capable of driving the locking member 300 to move along the axial direction X. In some optional embodiments, the drive mechanism 600 can adopt a hydraulic structure. Optionally, the drive mechanism 600 may include a piston rod 620. The end of the pin body 310 facing away from the pin head 320 may be provided with a hydraulic chamber 330. The rod portion of the piston rod 620 is connected to a fixed seat 610, which supports the piston rod 620. The piston portion of the piston rod 620 is inserted into the hydraulic chamber 330 and dynamically sealed to the hydraulic chamber 330. The piston portion divides the hydraulic chamber 330 into a first chamber 331 and a second chamber 332. The rod portion of the piston rod 620 is provided with a first oil passage and a second oil passage. The first oil passage communicates with the first chamber 331, and the second oil passage communicates with the second chamber 332.

[0093] The locking process of the moving shaft 100 will be explained below, taking the portion of the hydraulic chamber 330 located on the piston side facing the locking disc 120 as the first chamber 331 and the portion of the hydraulic chamber 330 located on the piston side facing away from the locking disc 120 as the second chamber 332.

[0094] When locking the moving shaft 100 is required, hydraulic oil is introduced into the first chamber 331 through the first oil passage. Since the piston rod 620 is connected to the fixed seat 610, the hydraulic oil pressure pushes the locking member 300 to move in the direction close to the locking disc 120. Then, the pin head 320 of the locking member 300 extends into the locking hole 420. During this process, the volume of the first chamber 331 gradually increases, and the volume of the second chamber 332 gradually decreases. The hydraulic oil in the second chamber 332 flows out of the second chamber 332 through the second oil passage. When unlocking, hydraulic oil is introduced into the second chamber 332 through the second oil passage. Under the pressure of the hydraulic oil, the volume of the second chamber 332 gradually increases, and the locking member 300 moves in the direction away from the locking disc 120, so that the pin head 320 of the locking member 300 retracts from the locking hole 420 into the guide sleeve 500. During this process, the volume of the first chamber 331 gradually decreases, and the hydraulic oil in the first chamber 331 flows out of the first chamber 331 through the first oil passage. The 600 hydraulic drive mechanism is reliable and has a large driving force.

[0095] Of course, the structure of the drive mechanism 600 is not limited to this. The drive mechanism 600 may also adopt an electric telescopic rod, etc., which are also within the protection scope of this application.

[0096] The embodiments of the present invention described above are not exhaustive, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A shaft system structure, characterized in that, include: A shaft assembly includes a rotating shaft and a fixed shaft. The rotating shaft includes a first shaft body and a locking disc coaxially disposed with the first shaft body. The locking disc is provided with an insertion groove extending a predetermined depth along the axial direction of the shaft assembly. The insertion groove is disposed on the outer peripheral surface of the locking disc to have an opening on the outer peripheral surface of the locking disc. A locking assembly is disposed on the shaft assembly. The locking assembly includes a locking member disposed on the fixed shaft. At least a portion of the locking member can extend into the insertion slot to lock the relative position of the moving shaft and the fixed shaft. The fixed shaft includes a second shaft body and a locking seat disposed on the outer wall of the second shaft body. The locking seat is provided with a mounting hole extending along the axial direction. The locking assembly also includes a guide sleeve, which is cylindrical and disposed in the mounting hole. The locking member is axially movably connected to the guide sleeve.

2. The shaft system structure according to claim 1, characterized in that, The locking assembly further includes a locking sleeve comprising a cylindrical body having a locking hole extending along the axial direction, the body being inserted into the insertion groove, and at least a portion of the locking member being able to extend into the locking hole to lock the moving shaft.

3. The shaft system structure according to claim 2, characterized in that, The number of insertion slots shown is multiple, and the multiple insertion slots are distributed at intervals in the circumferential direction of the shaft assembly. Each insertion slot is provided with a locking sleeve, and the locking sleeve is detachably connected to the locking disc.

4. The shaft system structure according to claim 2, characterized in that, The outer diameter of the locking disc satisfies equation (1). 2d1≤D1≤2d1+ D2 (1) Wherein, D1 is the outer diameter of the locking disc, d1 is the distance from the central axis of the locking sleeve to the central axis of the shaft assembly, and D2 is the outer diameter of the sleeve body.

5. The shaft system structure according to claim 2, characterized in that, The insertion groove has a U-shaped orthographic projection in the axial direction, and the bottom of the insertion groove is a semi-circular shape that matches the sleeve body. The width of the opening of the insertion groove in the direction perpendicular to the radial direction of the shaft assembly is greater than or equal to the outer diameter of the sleeve body, so that the locking sleeve can be moved out of the insertion groove in the radial direction.

6. The shaft system structure according to claim 2, characterized in that, The sidewall that encloses the insertion slot is an arc-shaped surface that matches the sleeve body, and the central angle of the arc-shaped surface is greater than 180 degrees and less than 360 degrees.

7. The shaft system structure according to claim 2, characterized in that, The locking sleeve also includes a flange portion connected to one end of the sleeve body, the flange portion being connected to the locking disc by a first fastener extending along the axial direction.

8. The shaft system structure according to claim 7, characterized in that, The flange is located on the side of the locking disc facing away from the locking member. The sleeve has flanges on both sides in its radial direction. In the circumferential direction of the shaft assembly, the two flanges are respectively located on both sides of the insertion slot; or... The flange is located on the side of the locking disc facing the locking member, and the flange is annular in shape surrounding the sleeve.

9. The shaft system structure according to claim 2, characterized in that, The sleeve has a through hole extending radially through it. The sleeve is connected to the locking disc by a second fastener, a portion of which is located in the insertion slot and the other portion is located in the locking disc.

10. The shaft system structure according to claim 2, characterized in that, The size of the locking hole gradually increases in the axial direction along the direction closer to the locking member.

11. The shaft system structure according to claim 1, characterized in that, The locking seat has a connecting boss on the side of the mounting hole facing away from the locking disc. The guide sleeve is connected to the connecting boss by a third fastener, which extends along the axial direction.

12. The shaft system structure according to claim 11, characterized in that, The locking assembly further includes a drive mechanism connected to the locking member and capable of driving the locking member to move axially. The driving mechanism includes a fixed seat. In the axial direction, the fixed seat and the guide sleeve are located on both sides of the connecting boss. The third fastener passes through the fixed seat and the connecting boss in sequence and is then screwed into the end of the guide sleeve.

13. A wind turbine generator set, characterized in that, Includes the shaft system structure as described in any one of claims 1-12.

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