Stator assembly with adjustable stator blades

Abstract

The invention provides a stator assembly with adjustable stator blades. The stator assembly comprises a casing, a stator blade and an adjustable stator blade, the inner ring is arranged in the casing, and a plurality of first mounting holes are sequentially formed in the inner ring around the axial direction of the stator assembly; the adjustable stator blades are in one-to-one correspondence with the first mounting holes, each adjustable stator blade comprises a blade body arranged between the casing and the inner ring and a first mounting shaft connected with the blade body, and at least part of each first mounting shaft is arranged in the corresponding first mounting hole; a guide hole part is arranged on the side, close to the blade body, of the first mounting hole, and the hole diameter of the guide hole part is increased in the direction close to the blade body. A guide shaft part is arranged on the side, close to the blade body, of the first mounting shaft, the shaft diameter of the guide shaft part is decreased in the direction away from the blade body, and the guide shaft part is mounted to the guide hole part. In this way, the assembling efficiency of the stator assembly can be improved, the assembling cost of the stator assembly is reduced, and the assembling quality of the stator assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine assembly, in particular to a stator assembly containing adjustable vanes. BACKGROUND

[0002] In the related art, the stator assembly is assembled by assembling the casing, the adjustable vane and the inner ring as a whole. The mounting shaft of the adjustable vane is usually a cylindrical shaft structure, and the mounting hole of the inner ring is usually a cylindrical hole structure. Under the influence of factors such as assembly error, misalignment will occur between the mounting shaft of the adjustable vane and the mounting hole of the inner ring, which will cause the mounting shaft of the adjustable vane to be unable to be smoothly mounted into the mounting hole of the inner ring, thereby affecting the assembly quality and efficiency. SUMMARY

[0003] The present application is made to solve the above technical problems, and aims to provide a stator assembly containing adjustable vanes, which can avoid assembly interference in the assembly process of the stator assembly.

[0004] The present application provides a stator assembly containing adjustable vanes, comprising: a casing; an inner ring provided in the casing, the inner ring being provided with a plurality of first mounting holes in sequence along the axial direction of the stator assembly; a plurality of adjustable vanes corresponding one-to-one to the first mounting holes, the adjustable vane comprising a vane body provided between the casing and the inner ring, and a first mounting shaft connected to the vane body, at least a portion of the first mounting shaft being provided in the first mounting hole; wherein the first mounting hole is provided with a guide hole portion on the side close to the vane body, the hole diameter of the guide hole portion increasing towards the side close to the vane body; the first mounting shaft is provided with a guide shaft portion on the side close to the vane body, the shaft diameter of the guide shaft portion decreasing away from the vane body, and the guide shaft portion being mounted to the guide hole portion. In this way, the assembly efficiency of the stator assembly can be improved, the assembly cost of the stator assembly can be reduced, and the assembly quality of the stator assembly can be improved.

[0005] Optionally, the guide hole portion is a tapered hole, and the guide shaft portion is a tapered shaft. With this kind of tapered surface matching design, the adjustable vane has better centering to the inner ring, the first mounting hole is more easily fitted into the first mounting shaft, and the assembly efficiency and quality are further improved.

[0006] Optionally, there is a first gap between the guide hole portion and the guide shaft portion. This reduces the contact position and ensures smooth rotation of the adjustable vane.

[0007] Optionally, the inner ring comprises a plurality of inner ring segments connected end to end, and the first mounting hole is provided in the inner ring segment to facilitate assembly.

[0008] Optionally, the taper of the guide hole portion of the first mounting hole satisfies:

[0009]

[0010] Wherein, a is the taper of the guide hole part of the first mounting hole, and n is the number of the inner ring segments. In this way, the taper of the guide hole part is controlled by the number of the inner ring segments, and the structural strength and service life of the inner ring segments can be ensured without affecting the centering and anti-interference effect.

[0011] Optionally, the taper of the guide shaft part of the first mounting shaft satisfies a' is the taper of the guide shaft part of the first mounting shaft, to ensure the matching between the guide shaft part and the guide hole part.

[0012] Optionally, the number of the inner ring segments provided in the inner ring is 6-10. If the number of the first mounting holes is too small, it cannot be fully matched with the number of the adjustable vanes. As mentioned above, the matching design of the first mounting hole and the first mounting shaft can avoid interference, so the number of the inner ring segments can be reduced.

[0013] Optionally, the first mounting hole further comprises a light hole part provided on the side of the guide hole part away from the vane body; and the first mounting shaft further comprises a light shaft part provided on the side of the guide shaft part away from the vane body, the light shaft part being provided in the light hole part, so that the first mounting hole and the first mounting shaft are better matched.

[0014] Optionally, a bushing is further provided, which is provided in the gap between the light hole part and the light shaft part, and the bushing and the light shaft part are in small gap fit, so that the adjustable vane can be rotated to adjust the angle, and the assembly precision of the stator assembly as a whole is ensured.

[0015] Optionally, the first mounting shaft is provided with a step surface at the joint position of the guide hole part and the light shaft part; the step surface is provided opposite to the bushing, so that the guide hole part and the bushing have a second gap, and the first gap is communicated with the second gap, which can further reduce the contact position between the first mounting shaft and the first mounting hole, and ensure smooth rotation of the adjustable vane.

[0016] The beneficial effects of the present application are as follows:

[0017] The stator assembly provided in the application comprises: a stator assembly comprising adjustable vanes, comprising: a casing; an inner ring arranged in the casing, the inner ring is sequentially provided with a plurality of first mounting holes in the axial direction of the stator assembly; a plurality of adjustable vanes corresponding to the first mounting holes one by one, the adjustable vane comprises a vane body arranged between the casing and the inner ring, and a first mounting shaft connected to the vane body, at least part of the first mounting shaft is arranged in the first mounting hole; wherein the side of the first mounting hole close to the vane body is provided with a guide hole part, the hole diameter of the guide hole part increases towards the side close to the vane body; the side of the first mounting shaft close to the vane body is provided with a guide shaft part, the shaft diameter of the guide shaft part decreases away from the vane body, and the guide shaft part is mounted to the guide hole part.

[0018] The assembly process of the stator assembly provided in the application is as follows:

[0019] The adjustable vane mounting process is performed: the second mounting shaft is mounted into the second mounting hole, so that the adjustable vane is mounted to the casing.

[0020] The inner ring segment pressing process is performed: the inner ring segment is pressed on the adjustable vane along the assembly direction, so that the first mounting hole is sleeved on the first mounting shaft.

[0021] The inner ring segment pressing process is repeatedly performed until the plurality of inner ring segments are spliced to form the inner ring.

[0022] It can be seen that in the above assembly process, in the first aspect, during the inner ring segment pressing process, due to the larger side of the first mounting hole, the first mounting hole is first sleeved on the smaller side of the first mounting shaft, so that there is a larger tolerance space between the first mounting hole and the first mounting shaft in the initial stage of the inner ring segment pressing process, thereby avoiding the misalignment between the first mounting hole and the first mounting shaft during the pressing process, and fundamentally solving the assembly interference problem.

[0023] In the second aspect, due to the avoidance of assembly interference, it is not necessary to spend a long time on hole-shaft alignment and other operations in the inner ring segment pressing process, so that the assembly efficiency of the stator assembly can be improved.

[0024] In the third aspect, due to the avoidance of assembly interference, the number of inner ring segments can be reduced, for example, under the condition that other parameters remain unchanged, the number of inner ring segments can be reduced from at least 8, preferably 12, in the traditional scheme to at least 6, preferably 10, so that the number of materials can be reduced and the structural complexity of the stator assembly can be simplified.

[0025] In the fourth aspect, compared with the traditional scheme, the number of inner ring segments does not need to be increased, which makes the overall structure of the stator assembly more compact, is beneficial to the precision adjustment of the adjustable vane, and further improves the performance of the stator assembly.

[0026] In summary, the technical solution of this application can improve the assembly efficiency of the stator assembly, reduce the assembly cost of the stator assembly, and improve the assembly quality of the stator assembly. Attached Figure Description

[0027] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0028] Figure 1 This diagram illustrates the assembly relationship between the casing, adjustable stationary blades, and inner ring in the relevant art.

[0029] Figure 2 It shows Figure 1 Enlarged view of point I;

[0030] Figure 3 This diagram illustrates the structure of an inner ring when all inner ring segments in a stator assembly are spliced ​​together to form an inner ring in a related technology.

[0031] Figure 4 It shows Figure 3 Enlarged view at point II;

[0032] Figure 5 This diagram illustrates a structure in the related technology where only one inner ring segment is assembled into the stator assembly.

[0033] Figure 6 It shows Figure 5 Enlarged view of section III;

[0034] Figure 7 A structural diagram of the adjustable stationary blade in the related technology is shown;

[0035] Figure 8 A schematic diagram of the structure of the stator component of this application is shown;

[0036] Figure 9 This diagram shows the assembly relationship between the casing, adjustable stationary blades, and inner ring of this application.

[0037] Figure 10 It shows Figure 9 Enlarged view of section IV;

[0038] Figure 11 This diagram shows the structure of the stator assembly of this application when all inner ring segments are spliced ​​together to form an inner ring;

[0039] Figure 12 It shows Figure 11 Enlarged view of point V;

[0040] Figure 13This diagram shows the structure of the stator assembly of this application with only one inner ring segment assembled;

[0041] Figure 14 It shows Figure 13 Enlarged view of section VI;

[0042] Figure 15 A structural diagram of the adjustable stationary blade of this application is shown.

[0043] Explanation of reference numerals in the attached figures:

[0044] X-axis, Z-assembly direction

[0045] Q1 - Centerline of rotation, Q2 - Dividing surface

[0046] P1 - First gap, P2 - Second gap

[0047] S-interference point

[0048] 100-casing,

[0049] 110 - Second mounting hole

[0050] 300-Inner Ring Road

[0051] 301-Inner Ring Road

[0052] 310 - First mounting hole

[0053] 311 - Guide hole section, 312 - Smooth hole section

[0054] 200-Adjustable stationary blades,

[0055] 210-blade body,

[0056] 220 - First mounting shaft

[0057] 221 - Guide shaft section, 222 - Optical shaft section

[0058] 230 - Second mounting shaft

[0059] 400-Bushing. Detailed Implementation

[0060] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0061] It should be noted that these and other accompanying drawings are merely examples and are not drawn to scale, and should not be construed as limiting the scope of protection of the present invention.

[0062] Figures 1-7 This refers to the assembly structure of the stator component in the related technology, wherein, Figure 1 This diagram illustrates the assembly relationship between the casing, adjustable stationary blades, and inner ring in the relevant art. Figure 2 It shows Figure 1 Enlarged view at point I. The stator assembly requires the casing 100, adjustable stator blade 200, and inner ring 300 to be assembled as a whole. The adjustable stator blade 200 can rotate within the stator assembly for angle adjustment. However, due to factors such as assembly errors, assembly interference occurs between the mounting shaft of the adjustable stator blade 200 and the mounting hole of the inner ring 300 due to misalignment. The specific reasons are as follows:

[0063] Figure 3 This diagram shows the structure of the stator assembly in the related technology when all inner ring segments 301 are spliced ​​together to form an inner ring 300; Figure 4 It shows Figure 3 Enlarged view at point II; Figure 5 This diagram shows a structure in the related art where only one inner ring segment 301 is assembled into the stator assembly; Figure 6 It shows Figure 5 Enlarged view of section III; Figure 7 A structural diagram of the adjustable stationary blades in the related technology is shown. Firstly, for assembly purposes, the inner ring 300 is divided into several inner ring segments 301; that is, the inner ring 300 is a complete ring assembled from several inner ring segments 301. During assembly, several adjustable stationary blades 200 are first assembled into the housing 100, and then the inner ring segments 301 are pressed into place one by one, ultimately forming... Figure 3 The inner ring 300. In the conventional design, the first mounting shaft 220 of the adjustable stationary blade 200 is designed as a cylinder, and the corresponding first mounting hole 310 of the inner ring 300 is designed as a cylindrical hole, as detailed below. Figure 6 and Figure 7 As shown.

[0064] by Figure 5 and Figure 6 Taking the assembly process of the inner ring section 301 as an example, Figure 5One inner ring segment 301 is fitted with five adjustable stationary blades 200. These five adjustable stationary blades 200 are designated as #1, #2, #3, #4, and #5 adjustable stationary blades in a clockwise direction. The inner ring segment 301 is press-fitted into place along the assembly direction Z, which is the radial direction of the stator assembly. Since the #3 adjustable stationary blade is located in the middle position, the angle β between the rotation centerline Q1 of the #3 adjustable stationary blade and the assembly direction Z is 0°. The rotation centerlines Q1 of the #2 and #4 adjustable stationary blades are respectively 15° with the assembly direction Z. The rotation centerlines Q1 of the #1 and #5 adjustable stationary blades are also 15°. The angle β between the rotation centerline Q1 of the #5 adjustable stationary blade and the assembly direction Z is 30°. Of course, the inner ring section 301 can also be matched with different numbers of adjustable stationary blades 200, such as 4 adjustable stationary blades 200, 6 adjustable stationary blades 200, etc. It can be seen that when the number of adjustable stationary blades 200 matched with the inner ring section 301 is odd, there will be an adjustable stationary blade 200 in the middle position, and the angle β of the adjustable stationary blade 200 in the middle position is 0°. When the number of adjustable stationary blades 200 matched with the inner ring section 301 is even, there is no adjustable stationary blade 200 in the middle position, nor is there an adjustable stationary blade 200 with an angle β of 0°. This will not be elaborated here.

[0065] Depend on Figure 5 and Figure 6 As can be seen from the example, the included angle β is a variable, and the included angle β corresponding to each position of the adjustable stationary blade 200 is different. Specifically, the included angle β between the rotation centerline Q1 of the adjustable stationary blade 200 and the assembly direction Z gradually increases from the middle position of the inner ring section 301 towards the dividing surface Q2 on both sides of the inner ring section 301. Here, the dividing surface Q2 is... Figure 4 The splicing position between two adjacent inner ring segments 301, the dividing surface Q2 is also known as Figure 5 The first and second side end faces of the inner ring segment 301 are located on opposite sides of the inner ring segment 301 along its own extension direction.

[0066] When assembling the inner ring section 301, due to assembly habits, priority is given to the first mounting shaft 220 of the adjustable stationary blade 200 located in the middle position (i.e., the adjustable stationary blade 200 with an included angle β of 0°), or the first mounting shaft 220 of the adjustable stationary blade 200 near the middle position (i.e., the adjustable stationary blade 200 with a smaller included angle β), and the hole-shaft correspondence between it and the first mounting hole 310 of the inner ring section 301. However, the larger the included angle β of the adjustable stationary blade 200, the greater the accumulated assembly error, and the worse the alignment between its first mounting shaft 220 and the first mounting hole 310. This makes it easier for the first mounting shaft 220 to interfere with the first mounting hole 310, especially for the adjustable stationary blade 200 near the dividing surface Q2 of the inner ring section 301, for example...Figure 6 The #5 adjustable stationary blade, which is assembled on the rightmost side of the inner ring section 301, is prone to interference point S between its first mounting shaft 220 and the first mounting hole 310. Similarly, the #1 adjustable stationary blade, which is assembled on the leftmost side of the inner ring section 301, is also prone to interference point S between its first mounting shaft 220 and the first mounting hole 310.

[0067] To solve this problem, the traditional solution is to increase the number of segments in the inner ring segment 301. For example, the commonly used empirical data for the number of segments in the inner ring segment 301 is more than 8, preferably 12. By increasing the number, the angular coverage range of a single inner ring segment 301 is reduced, thereby controlling the range of the angle β between the rotation centerline Q1 of the adjustable stationary blade 200 and the assembly direction Z of the inner ring segment 301 during assembly.

[0068] However, adopting the above-mentioned improvement scheme will also bring a series of problems. For example, firstly, the above scheme can only reduce the possibility of interference, but cannot fundamentally solve the problem of assembly interference; secondly, due to the increase in the number of inner ring segments 301, the number of parts increases, which in turn increases the structural complexity of the stator assembly and reduces assembly efficiency; thirdly, due to the structural characteristics of the stator assembly itself, there are gaps between adjacent inner ring segments 301. As the number of inner ring segments 301 increases, the overall structure of the stator assembly will become more loose, which is not conducive to the precision adjustment of the adjustable stator blades 200, and thus reduces the performance of the stator assembly.

[0069] In summary, to address the problems existing in the stator components of the aforementioned related technologies, the technical solution of this application was developed. The following is a detailed explanation... Figures 8-15 The description is as follows, wherein the reference numerals of the stator components in this application are consistent with those of the same components in the stator components of related technologies.

[0070] Figure 8 A schematic diagram of the structure of the stator component of this application is shown; Figure 9 This diagram illustrates the assembly relationship between the casing, adjustable stator blades, and inner ring of this application. The stator assembly disclosed in this application includes a casing 100, an inner ring 300, and adjustable stator blades 200. The casing 100 serves as the mounting base for the adjustable stator blades 200 and provides shielding protection for components within the stator assembly. The casing 100 is provided with several second mounting holes 110 around the axial direction X of the stator assembly.

[0071] Figure 11 This diagram shows the structure of the stator assembly of this application when all inner ring segments are spliced ​​together to form an inner ring; Figure 12 It shows Figure 11 Enlarged view of point V; Figure 13 This diagram shows the structure of the stator assembly of this application with only one inner ring segment assembled; Figure 14 It shows Figure 13Enlarged view at point VI. The inner ring 300 also serves as the mounting base for the adjustable stator blade 200. The inner ring 300 is provided with a number of first mounting holes 310 in sequence around the axial direction X of the stator assembly. Specifically, the inner ring 300 includes a number of inner ring segments 301 connected end to end. The splicing position of adjacent inner ring segments 301 is the location of the dividing surface Q2. The first mounting holes 310 are provided in the inner ring segments 301 to facilitate assembly.

[0072] like Figures 8-10 As shown, several adjustable stationary blades 200 are arranged around the axial direction X, and the several adjustable stationary blades 200, several first mounting holes 310, and several second mounting holes 110 correspond one-to-one. Each adjustable stationary blade 200 includes a blade body 210 disposed between the housing 100 and the inner ring 300, and a first mounting shaft 220 and a second mounting shaft 230 respectively connecting two opposite sides of the blade body 210. The first mounting shaft 220 and the second mounting shaft 230 are coaxially arranged.

[0073] At least a portion of the first mounting shaft 220 is rotatably disposed in the first mounting hole 310, and at least a portion of the second mounting shaft 230 is rotatably disposed in the second mounting hole 110. The adjustable stator blades 200 are typically installed in the first few stages of the stator assembly for adjusting the outlet angle. Specifically, when the speed of the stator assembly decreases from its design value, the angle of the adjustable stator blades 200 gradually decreases, while when the speed of the stator assembly increases, the angle of the adjustable stator blades 200 gradually increases, so that the angle at which the air flows onto the subsequent rotor blades is appropriate.

[0074] like Figures 11-14 As shown in this application, a guide hole portion 311 is provided on the side of the first mounting hole 310 near the blade body 210, and the diameter of the guide hole portion 311 increases towards the blade body 210; a guide shaft portion 221 is provided on the side of the first mounting shaft 220 near the blade body 210, and the shaft diameter of the guide shaft portion 221 decreases away from the blade body 210. The guide shaft portion 221 is installed into the guide hole portion 311. This avoids problems such as assembly interference. The anti-interference principle will be explained below using the assembly process of the stator assembly of this application.

[0075] The assembly process of the stator assembly in this application is as follows:

[0076] Perform the adjustable stationary blade installation process: insert the second mounting shaft 230 into the second mounting hole 110 so that the adjustable stationary blade 200 is installed into the casing 100.

[0077] Perform the inner ring section press-fitting process: Press the inner ring section 301 onto the adjustable stationary blade 200 along the assembly direction Z, so that the first mounting hole 310 is fitted onto the first mounting shaft 220, specifically as follows: Figure 13 As shown.

[0078] Repeat the inner ring segment pressing process until several inner ring segments 301 are spliced ​​end to end to form an inner ring 300, as detailed below. Figure 11 As shown.

[0079] As can be seen in the above assembly process, firstly, during the inner ring section press-fitting process, since the side with the larger diameter of the guide hole 311 is fitted onto the side with the smaller diameter of the guide shaft 221 first, there will be a large tolerance space between the guide hole 311 and the guide shaft 221 in the initial stage of the inner ring section 301 press-fitting process, thereby avoiding misalignment between the first mounting hole 310 and the first mounting shaft 220 during the press-fitting process, so as to fundamentally solve the assembly interference problem.

[0080] Secondly, due to the avoidance of assembly interference, there is no need to spend a long time on hole and shaft alignment in the inner ring pressing process, which can improve the assembly efficiency of the stator assembly.

[0081] Thirdly, by avoiding assembly interference, the number of inner ring segments 301 can be reduced. For example, under the condition that other parameters remain unchanged, the number of inner ring segments 301 can be reduced from at least 8, preferably 12, in the traditional scheme to at least 6, preferably 10, thereby reducing the amount of materials and simplifying the structural complexity of the stator assembly.

[0082] Fourthly, compared to the traditional solution, the number of inner ring sections 301 does not need to be increased, which will make the overall structure of the stator assembly more compact and facilitate the precision adjustment of the adjustable stator blades 200, thereby improving the performance of the stator assembly.

[0083] In summary, the technical solution of this application can improve the assembly efficiency of the stator assembly, reduce the assembly cost of the stator assembly, and improve the assembly quality of the stator assembly.

[0084] Optionally, the specific shape of the first mounting shaft 220 can be any structure with a large diameter at one end and a small diameter at the other end. For example, the generatrix of rotation of the first mounting shaft 220 can be an arc that convexes outward toward the side opposite to its axis, or an arc that is concave inward toward the side of its axis. The first mounting hole 310 can be a structure that matches the first mounting shaft 220. In this application, the following configuration is adopted:

[0085] Figure 9 This diagram shows the assembly relationship between the casing, adjustable stationary blades, and inner ring of this application. Figure 10 It shows Figure 9 Enlarged view of section IV; Figure 13 This diagram shows the structure of the stator assembly of this application with only one inner ring segment assembled; Figure 14 It shows Figure 13Enlarged view at point VI. The generatrix of rotation of the first mounting shaft 220 includes a section of inclined straight line. Specifically, the guide hole 311 is a tapered hole and the guide shaft 221 is a tapered shaft. This design with tapered surface fit enables the adjustable stationary blade 200 to have better centering relative to the inner ring 300, and the first mounting hole 310 is easier to fit into the first mounting shaft 220, further improving assembly efficiency and assembly quality.

[0086] Optionally, such as Figure 14 As shown, the taper of the guide hole portion 311 satisfies:

[0087]

[0088] Where α is the taper of the guide hole portion 311, and n is the number of inner ring segments 301.

[0089] If the taper α of the guide hole portion 311 is too small, it will reduce the anti-interference and centering effect of the conical surface fit. If the taper α of the guide hole portion 311 is too large, on the one hand, more material will need to be removed from the inner ring section 301, thereby reducing the structural strength of the inner ring section 301. On the other hand, it will make the opening of the first mounting hole 310 too large, resulting in sharp points between adjacent first mounting holes 310. This is not only not conducive to assembly, but also easy to damage in subsequent use. Therefore, the taper α of the guide hole portion 311 is controlled by the number n of the inner ring sections 301, so as to ensure the structural strength and service life of the inner ring section 301 without affecting the centering and anti-interference effect.

[0090] Furthermore, the taper of the guide shaft portion 221 of the first mounting shaft 220 satisfies α′ is the taper of the guide shaft portion 221 of the first mounting shaft 220 to ensure the matching between the guide shaft portion 221 and the guide hole portion 311.

[0091] Optionally, an inner ring segment 301 may be provided with 4 to 6 first mounting holes 310, for example... Figure 13 The inner ring segment 301 of the inner ring 300 is provided with 5 first mounting holes 310, but other numbers can also be provided, such as 4 or 6. The number of first mounting holes 310 on each inner ring segment 301 in the inner ring 300 can be equal, for example, each inner ring segment 301 is provided with 5 first mounting holes 310. The number of first mounting holes 310 on each inner ring segment 301 in the inner ring 300 can also be unequal, for example, some inner ring segments 301 are provided with 5 first mounting holes 310, while others are provided with 4 first mounting holes 310. This will not be described in detail here. If the number of first mounting holes 310 is too small, it will not be able to fully match the number of adjustable stationary blades 200. If the number of first mounting holes 310 is too large, it will affect the structural strength. Therefore, the above-mentioned number control is used to ensure the structural strength of the inner ring segment 301 and to match a sufficient number of adjustable stationary blades 200.

[0092] Optionally, the number of inner ring segments 301 provided in the inner ring 300 can be 6 to 10. As mentioned above, since the matching design of the first mounting hole 310 and the first mounting shaft 220 can avoid interference, the number of inner ring segments 301 can be reduced.

[0093] Optionally, such as Figure 9 , Figure 10 , Figure 13 and Figure 14 As shown, the first mounting hole 310 also includes a light hole portion 312 disposed on the side of the guide hole portion 311 away from the blade body 210; the first mounting shaft 220 also includes a light shaft portion 222 disposed on the side of the guide shaft portion 221 away from the blade body 210, and the light shaft portion 222 is disposed on the light hole portion 312, so that the first mounting hole 310 and the first mounting shaft 220 can be better matched.

[0094] Optionally, the stator assembly also includes a bushing 400, which is disposed in the annular cavity between the optical aperture portion 312 and the optical shaft portion 222. The fitting clearance between the bushing 400 and the optical shaft portion 222 satisfies: 0 to 0.02 mm, that is, the bushing 400 and the optical shaft portion 222 are fitted with a small clearance. This not only allows the adjustable stator blade 200 to rotate to adjust the angle, but also ensures the overall assembly accuracy of the stator assembly.

[0095] Optionally, there is a first gap P1 between the guide hole portion 311 and the guide shaft portion 221. Specifically, the design of the guide hole portion 311 and the guide shaft portion 221 is only used to avoid interference during the assembly of the stator assembly. After the assembly is completed, only the bushing 400 and the optical shaft portion 222 make contact and run-in, while the guide hole portion 311 and the guide shaft portion 221 do not theoretically make direct contact. This can reduce the contact area between the first mounting shaft 220 and the first mounting hole 310, making the adjustable stator blade 200 rotate more smoothly and making it easier to ensure adjustment accuracy.

[0096] Optionally, the first mounting shaft 220 is provided with a stepped surface at the connection position of the guide shaft portion 221 and the optical shaft portion 222; the stepped surface of the first mounting shaft 220 is disposed opposite to the bushing 400 so that there is a second gap P2 between the guide shaft portion 221 and the bushing 400, and the first gap P1 connects to the second gap P2, which can further reduce the contact position between the first mounting shaft 220 and the first mounting hole 310, and ensure that the adjustable stationary blade 200 rotates smoothly.

[0097] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0098] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A stator assembly containing adjustable stator blades, characterized in that, include: Casing (100); An inner ring (300) is provided in the casing (100), and the inner ring (300) is provided with a plurality of first mounting holes (310) in sequence around the axial direction (X) of the stator assembly; A plurality of adjustable stationary blades (200) corresponding one-to-one with the first mounting hole (310), the adjustable stationary blade (200) includes a blade body (210) disposed between the casing (100) and the inner ring (300), and a first mounting shaft (220) connecting the blade body (210), at least a portion of the first mounting shaft (220) being disposed in the first mounting hole (310); Wherein, the first mounting hole (310) is provided with a guide hole (311) on the side near the blade body (210), and the diameter of the guide hole (311) increases in the direction closer to the blade body (210); The first mounting shaft (220) is provided with a guide shaft portion (221) on the side near the blade body (210). The shaft diameter of the guide shaft portion (221) decreases in the direction away from the blade body (210). The guide shaft portion (221) is mounted to the guide hole portion (311).

2. The stator assembly according to claim 1, characterized in that, The guide hole (311) is a tapered hole, and the guide shaft (221) is a tapered shaft.

3. The stator assembly according to claim 2, characterized in that, There is a first gap (P1) between the guide hole portion (311) and the guide shaft portion (221).

4. The stator assembly according to claim 2, characterized in that, The inner ring (300) includes a plurality of inner ring segments (301) connected end to end, and the first mounting hole (310) is provided in the inner ring segment (301).

5. The stator assembly according to claim 4, characterized in that, The taper of the guide hole (311) satisfies: Wherein, α is the taper of the guide hole (311), and n is the number of the inner ring segments (301).

6. The stator assembly according to claim 5, characterized in that, The taper of the guide shaft (221) satisfies α′ is the taper of the guide shaft (221).

7. The stator assembly according to claim 4, characterized in that, The number of inner ring segments (301) set in the inner ring (300) is 6 to 10.

8. The stator assembly according to claim 2, characterized in that, The first mounting hole (310) further includes a light hole (312) located on the side of the guide hole (311) away from the blade body (210); The first mounting shaft (220) further includes an optical axis portion (222) disposed on the side of the guide shaft portion (221) away from the blade body (210), and the optical axis portion (222) is disposed on the optical aperture portion (312).

9. The stator assembly according to claim 8, characterized in that, It also includes a bushing (400) disposed in the cavity between the optical aperture portion (312) and the optical axis portion (222).

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