Novel output subassembly of yaw variable-pitch gearbox and yaw variable-pitch gearbox assembly
By integrating the outer or inner ring of the support bearing with the housing or output shaft, and combining it with the same-side isolation oil seal design, the problem of complex structure and numerous parts in traditional yaw and pitch gearboxes is solved, thereby improving assembly efficiency and achieving miniaturization and weight reduction of the entire machine.
Patent Information
- Application Number
- CN202520357738.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Traditional yaw and pitch gearboxes have complex output assembly structures, numerous bearing components, low assembly efficiency, large axial dimensions and weight, and high costs.
Integrating the outer or inner ring of the support bearing with the housing or output shaft reduces the number of parts, and placing the isolation oil seal on the same side of the support bearing eliminates the need for isolation space between bearings, simplifying the assembly process.
This has resulted in fewer supporting bearing components, improved assembly efficiency, reduced axial dimensions, lighter and smaller overall size, and lower costs.
Smart Images
Figure CN223725353U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gear box field, specifically, a yaw variable pitch gear box novel output part and yaw variable pitch gear box assembly are related. BACKGROUND
[0002] The structure of the conventional yaw variable pitch gear box output part is as follows: the output gear shaft and the lower box body are assembled together through the inner and outer rings of the small bearing and the large bearing; the round nut is used for the axial fixation of the small bearing; the small oil seal is assembled between the output gear shaft and the lower box body; the transparent cover is fixed on the lower box body; and the large oil seal is installed between the transparent cover and the output gear shaft. The design life time requirement of the wind power yaw variable pitch gear box is 20 years, and this kind of output part is a commonly used structure form of the yaw variable pitch gear box.
[0003] The structure design of the existing yaw variable pitch gear box output part adopts two bearings, and a certain axial span needs to be left to ensure the safety strength of the bearing, a small oil seal is arranged between the two bearings to isolate the lubricating oil and the lubricating grease, so that the axial size of the whole gear box is increased, the weight of the whole machine is large, and the cost is high. In addition, the number of parts of each bearing is large, the assembly steps are complicated, and the assembly efficiency is low. SUMMARY
[0004] The utility model discloses a yaw variable pitch gear box novel output part and yaw variable pitch gear box assembly, which can reduce the axial size, reduce the overall volume, reduce the number of parts, simplify the assembly steps, and improve the assembly efficiency.
[0005] The embodiment of the utility model can be realized as follows:
[0006] In a first aspect, the utility model provides a yaw variable pitch gear box novel output part, which comprises:
[0007] A box body, an output shaft, a plurality of support bearings, an isolation oil seal and an output end oil seal; the output shaft is rotatably installed on the box body through the plurality of support bearings, and the outer ring of at least one support bearing in the plurality of support bearings is arranged integrally with the box body or the inner ring of at least one support bearing is arranged integrally with the output shaft; the isolation oil seal and the output end oil seal are arranged between the box body and the output shaft, and the plurality of support bearings are located between the isolation oil seal and the output end oil seal.
[0008] In an optional embodiment, the plurality of support bearings comprises a first bearing, an outer ring of the first bearing is arranged integrally with the box to form a first outer raceway on the box, an inner ring of the first bearing is arranged integrally with the output shaft to form a first inner raceway on the output shaft, and a first rolling element assembly of the first bearing is clamped between the first outer raceway and the first inner raceway.
[0009] Based on the above scheme, by integrating the outer ring and the inner ring of the first bearing on the box and the output shaft respectively, the structure of the first bearing is highly simplified, the number of parts is small, and the assembly of the first bearing is facilitated.
[0010] In an optional embodiment, the first outer raceway and the first inner raceway are both arranged as conical surfaces and the angles of both are α.
[0011] Based on the above scheme, the first bearing is a tapered roller bearing, has strong carrying capacity, and relies on the box and the output shaft to provide axial positioning, and the axial position of the first rolling element assembly is stable and reliable.
[0012] In an optional embodiment, the plurality of support bearings comprises a second bearing, an outer ring of the second bearing is arranged integrally with the box to form a second outer raceway on the box, an inner ring of the second bearing is fixed outside the output shaft, and a second rolling element assembly of the second bearing is clamped between the second outer raceway and the inner ring of the second bearing.
[0013] Based on the above scheme, the outer ring of the second bearing is integrated on the box, which reduces the number of parts of the second bearing, simplifies the installation steps of the second bearing, and improves the installation efficiency of the second bearing. Moreover, by independently designing the inner ring of the second bearing, interference of the output shaft during installation of the second bearing is avoided, and the installation success rate of the second bearing is improved.
[0014] In an optional embodiment, the second outer raceway is arranged as a conical surface and the angle is β.
[0015] Based on the above scheme, the second bearing is a tapered roller bearing, has strong carrying capacity, and relies on the box and the inner ring to provide axial positioning, and the axial position of the second rolling element assembly is stable and reliable.
[0016] In an optional embodiment, the direction of α is opposite to the direction of β, the first bearing is located on the side of the second bearing close to the output end oil seal, the first outer raceway has a first side and a second side arranged in the axial direction of the output shaft, the diameter of the first side is greater than that of the second side, and the first side is closer to the output end oil seal than the second side.
[0017] Based on the above scheme, the first bearing and the second bearing cooperate to have good support effect.
[0018] In an optional embodiment, an outer circumferential surface of the output shaft is provided with a blocking step, one side of an inner ring of the second bearing is in contact with the blocking step;
[0019] The output shaft is further sleeved with a limiting ring, the limiting ring is in contact with the other side of the inner ring of the second bearing, so as to limit the axial freedom degree of the inner ring of the second bearing through cooperation of the limiting ring and the blocking step.
[0020] Based on the above scheme, the axial position stability of the inner ring of the second bearing is improved through cooperation of the limiting ring and the limiting step.
[0021] In an optional embodiment, the limiting ring is provided as a nut, and the nut is in threaded connection with the output shaft.
[0022] Based on the above scheme, the connection mode of the limiting ring and the output shaft is simple and reliable, and assembly is facilitated.
[0023] In an optional embodiment, the isolation oil seal is arranged between the limiting ring and the box body.
[0024] Based on the above scheme, the limiting ring plays a role in supporting the isolation oil seal, and it is not necessary to arrange a diameter-increasing part on the outer circumferential surface of the output shaft to support the isolation oil seal, so that the structure of the output shaft is simplified, the machining difficulty of the output shaft is reduced, the weight of the output shaft is reduced, and the lightweight design of the entire gear box is facilitated.
[0025] In a second aspect, the utility model provides a yaw variable pitch gear box assembly, comprising:
[0026] The yaw variable pitch gear box novel output assembly of any one of the foregoing embodiments.
[0027] The beneficial effects of the utility model embodiment include, for example:
[0028] In summary, the yaw variable pitch gear box novel output assembly provided by the embodiment can reduce the number of parts of the supporting bearing by integrating the outer ring of the supporting bearing with the box body or integrating the inner ring of the supporting bearing with the output shaft, thereby saving assembly steps, simplifying assembly procedures, and improving assembly efficiency. At the same time, since the isolation oil seal is arranged on the same side of the plurality of supporting bearings, the space for arranging the isolation oil seal between the supporting bearings can be saved, the distance between the supporting bearings is reduced, the axial span is reduced, the axial size of the output shaft is reduced, and the miniaturization and lightweight design of the entire gear box are facilitated. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, for those skilled in the art, without creative labor, other related drawings can also be obtained according to these drawings.
[0030] Figure 1 The figure is a schematic view of the novel output part of the yaw variable pitch gearbox in the embodiments of the present application.
[0031] Icon:
[0032] 100-box; 110-first outer raceway; 120-second outer raceway; 200-output shaft; 210-first inner raceway; 220-first step surface; 230-second step surface; 240-limiting step; 300-first bearing; 400-second bearing; 500-isolation oil seal; 600-output end oil seal; 700-limiting ring. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0034] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0035] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0036] In the description of the present application, it should be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.
[0037] In addition, if the terms "first", "second" and the like are used herein, they are merely used to distinguish one entity from another, and do not imply or suggest a relative importance.
[0038] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.
[0039] In the prior art, the output gear shaft is generally supported between the lower housings of the gear box through two bearings, and an oil seal structure is further arranged between the two bearings, the inner side of the oil seal structure is matched with the output gear shaft, and the outer side is matched with the lower housing. Since each bearing includes an inner ring, an outer ring and a rolling element assembly arranged between the inner ring and the outer ring, the number of parts of the bearing is large, the cost is high, and the structure is complex, and the assembly efficiency is low. The oil seal is arranged between the two bearings, which increases the axial span between the two bearings, so that the axial size of the output gear shaft is large, the volume of the whole machine is large, and the weight is large.
[0040] Therefore, the designer provides a new output part of yaw variable pitch gear box, which can simplify the structure, reduce the cost, improve the assembly efficiency, and also can reduce the axial size of the whole machine, which is beneficial to the lightweight and small size design.
[0041] Please refer to Figure 1 The embodiment provides a new output part of yaw variable pitch gear box, which comprises a box body 100, an output shaft 200, a plurality of supporting bearings, an isolation oil seal 500 and an output end oil seal 600. The output shaft 200 is rotatably mounted on the box body 100 through the plurality of supporting bearings, and the outer ring of at least one of the plurality of supporting bearings is integrated with the box body 100 or the inner ring of at least one of the plurality of supporting bearings is integrated with the output shaft 200; the isolation oil seal 500 and the output end oil seal 600 are both arranged between the box body 100 and the output shaft 200, and the plurality of supporting bearings are all located between the isolation oil seal 500 and the output end oil seal 600.
[0042] As described above, the new output part of yaw variable pitch gear box provided by the embodiment has the following advantages:
[0043] By integrating the outer ring of the supporting bearing with the box body 100 or / and integrating the inner ring of the supporting bearing with the output shaft 200, the number of parts of the supporting bearing can be reduced, so that the assembly steps are saved, the assembly process is simplified, and the assembly efficiency is improved. At the same time, since the isolation oil seal 500 is arranged on the same side of the plurality of supporting bearings, the space for arranging the isolation oil seal 500 between the supporting bearings can be saved, the distance between the supporting bearings is reduced, the axial span is reduced, the axial size of the output shaft 200 is reduced, and the small size and lightweight design of the whole gear box are facilitated.
[0044] It should be understood that the number of support bearings is set as required, and in the embodiment, the number of support bearings is taken as two for illustration, and for the convenience of description, the two support bearings are respectively a first bearing 300 and a second bearing 400.
[0045] Details of the new output part of the yaw variable pitch gearbox in the embodiment of the application are described below by way of example.
[0046] Please refer to Figure 1 In the embodiment, optionally, the new output part of the yaw variable pitch gearbox includes a box body 100, an output shaft 200, a first bearing 300, a second bearing 400, an isolation oil seal 500, an output end oil seal 600, and a limiting ring 700. The output shaft 200 is arranged in the box body 100, and the output shaft 200 is rotatably connected to the box body 100 through the first bearing 300 and the second bearing 400. One end of the output shaft 200 extends out of the box body 100, and the end of the output shaft 200 extending out of the box body 100 can be referred to as an output end. The isolation oil seal 500 is installed in the box body 100 and located between the box body 100 and the output shaft 200. The output end oil seal 600 is designed close to the output end and located between the box body 100 and the output shaft 200. The first bearing 300 and the second bearing 400 are both located between the isolation oil seal 500 and the output end oil seal 600, and the first bearing 300 is close to the output end oil seal 600, and correspondingly, the second bearing 400 is close to the isolation oil seal 500. The isolation oil seal 500 can separate the lubricating oil in the box body 100 from the lubricating grease, and the lubricating grease is located between the isolation oil seal 500 and the output end oil seal 600 and used to lubricate the first bearing 300 and the second bearing 400. The limiting ring 700 is installed on the output shaft 200, and the limiting ring 700 cooperates with the second bearing 400 to limit the axial freedom degree of the second bearing 400.
[0047] Please refer to Figure 1 Optionally, the outer ring of the first bearing 300 is arranged integrally with the box body 100 to form a first outer raceway 110 on the box body 100. The inner ring of the first bearing 300 is arranged integrally with the output shaft 200 to form a first inner raceway 210 on the output shaft 200. The first rolling body assembly of the first bearing 300 is clamped between the first outer raceway 110 and the first inner raceway 210. It should be understood that the first outer raceway 110 and the first inner raceway 210 are close to the output end oil seal 600. In addition, the first rolling body assembly can include a first retainer and a plurality of first rolling bodies installed on the first retainer, and the first rolling bodies can be steel balls.
[0048] Meanwhile, the first outer raceway 110 and the first inner raceway 210 can be provided as conical surfaces, which are circular conical surfaces, and the axes of the first outer raceway 110 and the first inner raceway 210 coincide with the axis of the output shaft 200. Moreover, the angle between the generatrix of the conical surface and the axis is α, that is, the circular conical angle of the conical surface is 2α. Moreover, the first outer raceway 110 has a first side and a second side arranged in the axial direction of the output shaft 200, the diameter of the first side is larger than that of the second side, and the first side is closer to the output end oil seal 600 than the second side, that is, the side with a larger opening of the first outer raceway 110 faces the output end oil seal 600. Correspondingly, the side with a larger opening of the first inner raceway 210 faces the output end oil seal 600.
[0049] It should be understood that the first outer raceway 110 is an inner circular conical surface, and the first inner raceway 210 is a corresponding outer circular conical surface.
[0050] Optionally, the outer ring of the second bearing 400 is provided integrally with the box body 100 to form a second outer raceway 120 on the box body 100. The inner ring of the second bearing 400 is fixed to the outside of the output shaft 200, and the second rolling body assembly of the second bearing 400 is clamped between the second outer raceway 120 and the inner ring of the second bearing 400. It should be understood that the second outer raceway 120 is close to the isolation oil seal 500. In addition, the second rolling body assembly can include a second retainer and a plurality of second rolling bodies mounted on the second retainer, and the second rolling bodies can be steel balls.
[0051] Meanwhile, the second outer raceway 120 can be provided as a conical surface, which is a circular conical surface, and the axis of the second outer raceway 120 coincides with the axis of the output shaft 200. Moreover, the angle between the generatrix of the conical surface of the second outer raceway 120 and the axis is β, that is, the circular conical angle of the conical surface is 2β. Moreover, the direction of α is opposite to the direction of β, that is, the side with a larger opening of the second outer raceway 120 faces the isolation oil seal 500.
[0052] Please refer to Figure 1In the embodiment, optionally, the outer circumferential surface of the output shaft 200 is formed with a first step surface 220 and a second step surface 230 matched with the first inner raceway 210 and a limiting step 240 matched with the inner ring of the second bearing 400. The first step surface 220 and the second step surface 230 are respectively in contact with the two sides of the first rolling body assembly, thereby limiting the axial position of the first rolling body assembly. Since the first step surface 220 and the second step surface 230 are integrated on the output shaft 200, the structural strength is high and the output shaft 200 is not easy to be damaged, thereby being safe and reliable in use. The limiting step 240 can be in contact with the inner ring of the second bearing 400, thereby limiting the position of the inner ring of the second bearing 400. Meanwhile, the outer circumferential surface of the output shaft 200 is provided with an external thread, and the external thread is located on the side of the limiting step 240 away from the step surface. The limiting ring 700 can be a nut, and the limiting ring 700 is screwed on the external thread. The limiting ring 700 is matched with the limiting step 240, clamps the inner ring of the second bearing 400, limits the axial degree of freedom of the inner ring of the second bearing 400, and improves the stability of the inner ring of the second bearing 400. The second rolling body assembly is installed on the inner ring and is limited in axial displacement by the inner ring.
[0053] It should be noted that the box body 100 can be a split structure, for example, can include a detachably connected upper box body and lower box body, and the first bearing 300 and the second bearing 400 can be matched with the lower box body.
[0054] The assembly method of the novel output part of the yaw variable pitch gearbox provided in the embodiment includes, for example:
[0055] The first rolling body assembly is positioned on the first inner raceway 210, then the other end of the output shaft 200 opposite to the output end is inserted into the box body 100, the second rolling body assembly of the second bearing 400 is installed on the inner ring, then the inner ring is sleeved on the output shaft 200, and finally the limiting ring 700 is screwed on the output shaft 200. Finally, the isolating oil seal 500 and the output end oil seal 600 can be installed, and the installation method is simple and the assembly efficiency is high.
[0056] The novel output part of the yaw variable pitch gearbox provided in the embodiment has the advantages of simple structure, few parts, low cost, high assembly efficiency, small overall volume and light weight.
[0057] The embodiment further provides a yaw variable pitch gearbox assembly, which includes the novel output part of the yaw variable pitch gearbox provided in the foregoing embodiment and has at least the advantages of small volume, light weight and convenient installation.
[0058] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A novel yaw pitch gearbox output section assembly, characterized by, The output part of the yaw variable pitch gearbox comprises a box body (100), an output shaft (200), a plurality of supporting bearings, an isolation oil seal (500) and an output end oil seal (600); the output shaft (200) is rotatably mounted on the box body (100) through the plurality of supporting bearings, and the outer ring of at least one of the supporting bearings is integrated with the box body (100) or the inner ring of at least one of the supporting bearings is integrated with the output shaft (200); the isolation oil seal (500) and the output end oil seal (600) are arranged between the box body (100) and the output shaft (200), and the plurality of supporting bearings are located between the isolation oil seal (500) and the output end oil seal (600).
2. The yaw variable pitch gearbox output part according to claim 1, wherein: the plurality of supporting bearings comprise a first bearing (300), the outer ring of the first bearing (300) is integrated with the box body (100) to form a first outer raceway (110) on the box body (100), the inner ring of the first bearing (300) is integrated with the output shaft (200) to form a first inner raceway (210) on the output shaft (200), and the first rolling element assembly of the first bearing (300) is clamped between the first outer raceway (110) and the first inner raceway (210).
3. The yaw variable pitch gearbox output part according to claim 2, wherein: the first outer raceway (110) and the first inner raceway (210) are both tapered surfaces, and the angles of the first outer raceway (110) and the first inner raceway (210) are both α.
4. The yaw variable pitch gearbox output part according to claim 3, wherein: the plurality of supporting bearings comprise a second bearing (400), the outer ring of the second bearing (400) is integrated with the box body (100) to form a second outer raceway (120) on the box body (100), the inner ring of the second bearing (400) is fixed outside the output shaft (200), and the second rolling element assembly of the second bearing (400) is clamped between the second outer raceway (120) and the inner ring of the second bearing (400).
5. The yaw variable pitch gearbox output part according to claim 4, wherein: the second outer raceway (120) is a tapered surface, and the angle of the second outer raceway (120) is β.
6. The yaw variable pitch gearbox output part according to claim 5, wherein: the direction of α is opposite to the direction of β, the first bearing (300) is located on the side of the second bearing (400) close to the output end oil seal (600), the first outer raceway (110) has a first side and a second side arranged in the axial direction of the output shaft (200), the diameter of the first side is greater than the diameter of the second side, and the first side is closer to the output end oil seal (600) than the second side.
7. The yaw variable pitch gearbox output part according to any one of claims 4-6, wherein: The outer circumferential surface of the output shaft (200) is provided with a blocking step, one side of the inner ring of the second bearing (400) is in contact with the blocking step; The output shaft (200) is further sleeved with a limiting ring (700), the other side of the inner ring of the second bearing (400) is in contact with the limiting ring (700), so as to limit the axial freedom degree of the inner ring of the second bearing (400) through the cooperation of the limiting ring (700) and the blocking step.
8. The novel output part assembly of the yaw variable pitch gearbox according to claim 7, characterized in that: The limiting ring (700) is provided as a nut, and the nut is in screwing cooperation with the output shaft (200).
9. The novel output part assembly of the yaw variable pitch gearbox according to claim 7, characterized in that: The isolation oil seal (500) is arranged between the limiting ring (700) and the box body (100).
10. A yaw pitch gear box assembly characterized by, Including: The novel output part assembly of the yaw variable pitch gearbox according to any one of claims 1-9.