Fixing structure for reducing deformation of inner gear ring
By setting the gear grooves on the outer ring side of the inner ring of the wind power gear box and setting the corresponding limit teeth on the fixture, the problem of the inner ring deformation when the planetary wheel is meshed is solved, and a longer service life is achieved.
Patent Information
- Application Number
- CN202422316890.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The inner gear ring of the gear box for wind power will cause greater deformation when the planetary wheels engage, affecting its service life.
A fixed structure is designed, including an inner ring gear and a fixing member. The outer ring of the inner ring gear is provided with a uniformly distributed tooth groove, and the fixing member is provided with a limiting tooth corresponding to the tooth groove. The limiting tooth produces a reaction force on the inner ring gear through the tooth groove to limit its deformation.
Through the reaction force of the limiting teeth on the inner ring, the deformation of the inner ring is effectively reduced and its service life is improved.
Smart Images
Figure CN223004384U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gearboxes, and particularly relates to a fixing structure for reducing the deformation of an internal gear ring. Background Art
[0002] At present, the development of the wind power industry is changing with each passing day, and high-power density and compact wind power gearbox units have become the mainstream design in the industry.
[0003] The gearbox for wind power mainly adopts a planetary transmission structure. When the gearbox is running, meshing forces will be generated between the gears. Due to the large size of the gear ring and its relatively flexible structure, the gear ring will produce "petal-shaped" deformation when the planetary gears mesh. The connection between the internal gear ring and the box body generally adopts a connection method combining bolts and pins. Although the pins can offset part of the shear force generated by gear meshing, large deformation will still occur on the gear ring, which will affect the service life of the gear ring. Content of the Utility Model
[0004] Aiming at the above defects, the technical problem to be solved by the utility model is to provide a fixing structure for reducing the deformation of the internal gear ring, which can reduce the deformation of the gear ring and improve the service life of the gear ring.
[0005] The above technical purpose of the utility model is achieved through the following technical solutions:
[0006] The utility model provides a fixing structure for reducing the deformation of an internal gear ring, including an internal gear ring and a fixing member;
[0007] A plurality of uniformly distributed tooth grooves are arranged on the outer ring side of the internal gear ring;
[0008] An installation groove for installing the internal gear ring is arranged on the fixing member, and a plurality of limiting teeth corresponding to the tooth grooves one by one are arranged in the installation groove.
[0009] By adopting the above scheme, during the working process, the planetary gears mesh inside the internal gear ring, and the planetary gears generate a force on the internal gear ring along the meshing direction, making the internal gear ring tend to deform along the direction of the force. Since tooth grooves are arranged on the outer ring side of the gear ring and limiting teeth corresponding to the tooth grooves are arranged on the fixing member, the limiting teeth generate a reaction force on the internal gear ring through the tooth grooves, and the deformation of the internal gear ring is restricted by the limiting teeth, effectively reducing the deformation of the internal gear ring during the working process.
[0010] The present utility model is further configured such that the tooth groove includes two side walls and a bottom wall, a plurality of limiting grooves are formed in the side walls, and a plurality of protruding portions that are in one-to-one correspondence and match with the limiting grooves on the corresponding side are provided on the tooth surface of the limiting teeth. Since the protruding portions on the tooth surface of the limiting teeth are inserted into the corresponding limiting grooves, all the protruding portions interact with the corresponding limiting grooves to increase the contact area, so that the limiting teeth can provide a uniformly distributed reaction force for the side walls of the limiting grooves, further reducing the deformation of the internal gear ring.
[0011] The present utility model is further configured such that there is a gap between the limiting teeth and the corresponding tooth grooves. Since there is a gap between the limiting teeth and the corresponding tooth grooves, when the internal gear ring is subjected to the acting force of the planet gears, the position of the acting point between the limiting teeth and the corresponding tooth grooves changes, further reducing the deformation of the gear ring along the tangential direction.
[0012] The present utility model is further configured such that the limiting groove is an arc-shaped groove. Since the cross-section of the limiting groove is arc-shaped, that is, the limiting groove is an arc-shaped groove, a relatively large contact area can be provided between the limiting groove and the corresponding protruding portion, thereby improving the uniformity of load distribution.
[0013] The present utility model is further configured such that an arc-shaped convex surface is formed by the protrusions between two adjacent limiting grooves, and the portion of the tooth surface of the limiting teeth between the two protruding portions is a concave surface that matches the convex surface. By the cooperation of the convex surface and the concave surface, the contact area is increased, thereby further ensuring the uniform load distribution.
[0014] The present utility model is further configured such that the convex surface is smoothly connected to the adjacent limiting groove.
[0015] The present utility model is further configured such that the intersection of the side wall and the outer circle of the internal gear ring is rounded. This prevents an acute angle from being formed at the intersection of the side wall and the outer circle of the internal gear ring.
[0016] The present utility model is further configured to further include a fixing ring, the fixing ring is detachably connected to the fixing member, and the fixing member and the fixing ring jointly clamp the internal gear ring. By jointly clamping the internal gear ring by the fixing ring and the fixing member, the deformation of the internal gear ring is further restricted.
[0017] The present utility model is further configured such that the fixing member is connected to the fixing ring by bolts.
[0018] The present utility model is further configured such that through holes are axially formed in the internal gear ring, and the bolts are arranged in the through holes. By limiting the internal gear ring with bolts, the structural stability of the internal gear ring is enhanced.
[0019] In summary, a fixing structure for reducing the deformation of the internal gear ring provided by the present utility model has at least the following beneficial effects:
[0020] 1. The limiting teeth generate a reaction force on the internal gear ring through the tooth grooves, and balance the force exerted on the internal gear ring by the planetary gears through the reaction force, reducing the deformation of the internal gear ring during operation.
[0021] 2. The service life of the internal gear ring is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0023] Figure 1 It is a schematic structural diagram of the fixing structure in the present invention (wherein the fixing ring is hidden);
[0024] Figure 2 It is a schematic structural diagram of the fixing member in the fixing structure of the present invention;
[0025] Figure 3 It is Figure 2 The enlarged view at A-1 in;
[0026] Figure 4 It is a schematic structural diagram of the internal gear ring and the planetary gear in the present invention;
[0027] Figure 5 It is Figure 4 The enlarged view at A-2 in;
[0028] Figure 6 It is a schematic structural diagram of the internal gear ring, the fixing member and the fixing ring fixedly connected by bolts in the present invention;
[0029] Figure 7 It is a schematic structural diagram of the fixing member in the present invention.
[0030] The reference numerals include: internal gear ring 1, fixing member 2, tooth groove 3, installation groove 4, limiting tooth 5, side wall 6, bottom wall 7, limiting groove 8, protruding portion 9, convex surface 10, concave surface 11, fixing ring 12, bolt 13, planetary gear 14. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0031] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will further elaborate on the present invention in conjunction with the Figures 1-7 drawings and specific embodiments.
[0032] Please refer to Figures 1-7, a fixing structure for reducing the deformation of the internal gear ring provided in this embodiment. The fixing structure includes a fixing member 2 and an internal gear ring 1. Among them, a plurality of evenly distributed tooth grooves 3 are provided on the outer ring side of the internal gear ring 1. The tooth grooves 3 are evenly distributed along the circumferential direction and penetrate the internal gear ring 1 along the axial direction. An installation groove 4 for installing the internal gear ring 1 is provided on the fixing member 2, and a plurality of limiting teeth 5 corresponding to the tooth grooves 3 one by one are provided in the installation groove 4. The limiting teeth 5 are inserted into the corresponding tooth grooves 3. Among them, the fixing member 2 can be the housing of the gearbox or a fixing seat connected to the housing of the gearbox and used for installing the internal gear ring 1.
[0033] By adopting the above scheme, during assembly, the internal gear ring 1 is inserted into the installation groove 4 along the axial direction, and the limiting teeth 5 are inserted into the corresponding tooth grooves 3 along the axial direction. During the working process, the planet gear 14 meshes inside the internal gear ring 1, and the planet gear 14 generates a force on the internal gear ring 1 along the direction of its meshing line, making the internal gear ring 1 tend to deform along the direction of the force. Since tooth grooves 3 are provided on the outer ring side of the gear ring and limiting teeth 5 corresponding to the tooth grooves 3 are provided on the fixing member 2, the limiting teeth 5 generate a reaction force on the internal gear ring 1 through the tooth grooves 3, and part of the force exerted by the planet gear 14 on the internal gear ring 1 is offset by the reaction force, thereby reducing the deformation of the internal gear ring 1 during the working process.
[0034] Specifically, the tooth groove 3 includes two side walls 6 and a bottom wall 7. A plurality of limiting grooves 8 are provided on the side walls 6, and the limiting grooves 8 penetrate the internal gear ring 1 along the axial direction. A plurality of protruding portions 9 corresponding to the limiting grooves 8 on the corresponding side are provided on the tooth surface of the limiting tooth 5, and the protruding portions 9 are inserted into the corresponding limiting grooves 8. In order to prevent an acute angle from being formed on the outer circle of the internal gear ring 1, preferably, the intersection of the side wall 6 and the outer circle of the internal gear ring 1 is rounded.
[0035] In this embodiment, preferably, the limiting groove 8 is an arc-shaped groove, the cross-section of the limiting groove 8 is arc-shaped, and the end surface of the protruding portion 9 is arc-shaped that fits the shape of the limiting groove 8. Since the cross-section of the limiting groove 8 is arc-shaped, that is, the limiting groove 8 is an arc-shaped groove, this enables a large contact area between the limiting groove 8 and the corresponding protruding portion 9, thereby improving the uniformity of load distribution.
[0036] The part between two adjacent limiting grooves 8 on the internal gear ring 1 protrudes to form an arc-shaped convex surface 10, and the part of the tooth surface of the limiting tooth 5 between two protruding portions 9 is an arc-shaped concave surface 11 that matches the convex surface 10. The convex surface 10 is smoothly connected to the adjacent limiting groove 8.
[0037] In order to further limit the deformation of the internal gear ring 1, preferably, there is a gap between the limiting teeth 5 and the corresponding tooth grooves 3. Correspondingly, there is a gap between the protruding portions 9 and the corresponding limiting grooves 8. When the internal gear ring 1 is subjected to the acting force of the planet gears 14, the position of the acting point between the limiting teeth 5 and the corresponding tooth grooves 3 changes. Correspondingly, the position of the acting point between the protruding portions 9 and the corresponding limiting grooves 8 changes, so that the deformation of the internal gear ring 1 along the tangential direction is further reduced.
[0038] Please refer to Figure 6 , in order to enhance the connection stability between the internal gear ring 1 and the fixing member 2, further, a fixing ring 12 is further included. The fixing ring 12 is detachably connected to the fixing member 2, and the fixing member 2 and the fixing ring 12 jointly clamp the internal gear ring 1. The fixing member 2 is connected to the fixing ring 12 by bolts 13. A through hole is axially formed in the internal gear ring 1, and the bolts 13 are arranged in the through hole and penetrate through the internal gear ring 1 along the axial direction of the internal gear ring 1. During assembly, first axially install the internal gear ring 1 into the installation groove 4, and after the bolts 13 pass through the through holes in the internal gear ring 1, threadedly connect them to the threaded holes on the fixing ring 12.
[0039] It should be noted that the words indicating directions in this article, such as up and down, etc., are all set in the direction of Figure 1 , only for the convenience of description and have no other specific meanings.
[0040] It also should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the article or device including the above elements.
[0041] Specific examples are used in this article to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.
Claims
1. A fixing structure for reducing deformation of an inner gear ring, characterized in that: It comprises an inner gear ring (1) and a fixing member (2); The outer ring side of the inner gear ring (1) is provided with a plurality of tooth grooves (3) which are evenly distributed; The fixing member (2) is provided with a mounting groove (4) for mounting the inner gear ring (1), and the mounting groove (4) is provided with a plurality of limiting teeth (5) which are matched one-to-one with the tooth grooves (3).
2. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 1, characterized in that: The tooth groove (3) comprises two side walls (6) and a bottom wall (7), the side walls (6) are provided with a plurality of limiting grooves (8), and the tooth surface of the limiting tooth (5) is provided with a plurality of protrusions (9) which match the limiting grooves (8) on the corresponding side in a one-to-one correspondence.
3. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 2, characterized in that: There is a gap between the limiting tooth (5) and the corresponding tooth groove (3).
4. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 2 or 3, characterized in that: The limiting groove (8) is an arc-shaped groove.
5. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 4, characterized in that: The portion between two adjacent limiting grooves (8) is raised to form an arc-shaped convex surface (10), and the portion of the tooth surface of the limiting tooth (5) located between the two protruding portions (9) is a concave surface (11) matching the convex surface (10).
6. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 5, characterized in that: The convex surface (10) is smoothly connected to the adjacent limiting groove (8).
7. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 5, characterized in that: The intersection between the side wall (6) and the outer circle of the inner gear ring (1) is rounded.
8. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 1, characterized in that: It also comprises a fixing ring (12), wherein the fixing ring (12) is detachably connected to the fixing member (2), and the fixing member (2) and the fixing ring (12) jointly clamp the inner gear ring (1).
9. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 8, characterized in that: The fixing member (2) is connected to the fixing ring (12) via bolts (13).
10. A fixing structure for reducing deformation of an inner gear ring as claimed in claim 9, characterized in that: The inner gear ring (1) is provided with a through hole along the axial direction, and the bolt (13) is inserted into the through hole.