CN220227691U - Gear box and transmission chain - Google Patents
Gear box and transmission chain Download PDFInfo
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- CN220227691U CN220227691U CN202320893400.4U CN202320893400U CN220227691U CN 220227691 U CN220227691 U CN 220227691U CN 202320893400 U CN202320893400 U CN 202320893400U CN 220227691 U CN220227691 U CN 220227691U
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- gear
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- transmission structure
- output gear
- planetary transmission
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 58
- 238000005461 lubrication Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of wind power generation, and discloses a gear box and a transmission chain. The gear box comprises a box body, a first planetary transmission structure and a main shaft. The first planetary transmission structure comprises a first sun gear, a first gear ring, a plurality of first pin shafts and a plurality of first planetary gears, wherein the first planetary gears are annularly arranged and meshed with the first sun gear, the first gear ring is annularly arranged and meshed with the first planetary gears, the first pin shafts are arranged on the box body, and each first planetary gear is arranged on one first pin shaft; the main shaft is rotatably connected to the box body, and the main shaft is connected to the first gear ring. Compared with the prior art, the planetary carrier is not arranged in the first planetary transmission structure, so that the production cost is reduced, the installation stability of the first planetary is improved, the sealing problem between the box body and the planetary carrier is not needed to be considered, the design difficulty is reduced, and the lubrication effect on the first planetary transmission structure is improved.
Description
Technical Field
The utility model relates to the technical field of wind power generation, in particular to a gear box and a transmission chain.
Background
Wind power is used as renewable energy, accelerates development, realizes energy substitution effect, promotes energy consumption structure optimization, and is not only a development requirement of the whole energy industry and social economy, but also a development target of the wind power industry.
In the wind power gear box, a first-stage planetary structure in the wind power gear box needs to be connected with a main shaft, specifically, the first-stage planetary structure comprises a sun wheel, planetary wheels, a planetary carrier and a gear ring, wherein a plurality of planetary wheels are annularly arranged and connected with the sun wheel in a meshed mode, the gear ring is connected with a box body, the gear ring is connected with a plurality of planetary wheels in a meshed mode, the main shaft outside is connected with a bearing seat in a rotating mode through a bearing, the main shaft is directly connected with the planetary carrier, the main shaft drives the planetary carrier and the planetary wheels to rotate, and then the sun wheel is driven to rotate, the planetary carrier is directly fixed on the main shaft, and the planetary carrier does not need to be supported in the box body through the bearing.
However, in the manner that the main shaft is directly connected with the planet carrier, the planet carrier is in a cantilever state, and in the working state, the deformation generated by the main shaft can be transmitted to the planet carrier, so that the planet carrier generates radial displacement, and when a large axis eccentric amount occurs between the box body and the planet carrier, the leakage of lubricating oil is very serious, and the effective transmission of the lubricating oil cannot be satisfied.
In view of the foregoing, there is a need for a gearbox and drive train that address the above-described problems.
Disclosure of Invention
Based on the above, the utility model aims to provide a gear box and a transmission chain, which cancel a planet carrier in a first planetary transmission structure, reduce production cost, reduce the design difficulty of the gear box and improve the lubrication effect on the first planetary transmission structure.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in one aspect, there is provided a gearbox comprising:
a case;
the first planetary transmission structure comprises a first sun gear, a first gear ring, a plurality of first pin shafts and a plurality of first planetary gears, wherein the first planetary gears are annularly arranged and meshed with the first sun gear, the first gear ring is annularly arranged and meshed with the first planetary gears, the first pin shafts are arranged on the box body, and each first planetary gear is arranged on one first pin shaft;
the main shaft is rotationally connected with the box body, and the main shaft is connected with the first gear ring.
As a preferable technical scheme of the gear box, the gear box further comprises a second planetary transmission structure, wherein the second planetary transmission structure comprises a second sun gear, a second gear ring, a planet carrier, a plurality of second pin shafts and a plurality of second planet gears, the second planet gears are annularly arranged and meshed with the second sun gear, the second gear ring is annularly arranged and meshed with the second planet gears, the second gear ring is fixed on the box body, the second pin shafts are installed on the planet carrier, each second planet gear is arranged on one second pin shaft, and the first sun gear is connected with the planet carrier.
As a preferable technical scheme of the gear box, the number of the second planetary transmission structures is plural, the plural second planetary transmission structures are sequentially connected along the axial direction of the second planetary transmission structure, and the second sun gear of the former second planetary transmission structure is connected with the planet carrier of the latter second planetary transmission structure.
As a preferable technical solution of the gear box, the second sun gear of the last second planetary transmission structure is connected to an output gear, and the output gear is rotatably connected to the box body.
As a preferable technical scheme of the gear box, the gear box further comprises a plurality of output gear shafts, the output gear shafts are rotatably connected with the box body, and the plurality of output gear shafts are arranged in a collar mode and are connected with the output gears in a meshed mode.
As a preferable technical scheme of the gear box, the gear box further comprises a plurality of generators, the generators are in one-to-one correspondence with the output gear shafts, each generator comprises a motor rotor and a motor stator, the motor rotor is connected with the output gear shaft, and the motor stator is connected with the box body.
As a preferable technical scheme of the gear box, the motor rotor is connected with the output gear shaft through a spline; or (b)
The motor rotor is connected with the output gear shaft through a flange; or (b)
The motor rotor is connected with the output gear shaft through a coupler; or (b)
The motor rotor is connected with the output gear shaft through a shrink disk.
As a preferable technical scheme of the gear box, the gear box further comprises a rotating frame flange, wherein two flange connecting parts are arranged at intervals along the radial direction of the rotating frame flange, one flange connecting part is used for connecting a main shaft, and the other flange connecting part is used for connecting the first gear ring.
As a preferable technical scheme of the gear box, the gear box further comprises a main shaft bearing seat, wherein the main shaft bearing seat is connected to the end part of the box body, and the main shaft is rotatably connected to the main shaft bearing seat.
In another aspect, there is provided a drive train comprising a gearbox as described in any one of the above aspects.
The beneficial effects of the utility model are as follows:
the utility model provides a gear box and a transmission chain, wherein a main shaft drives a first gear ring to rotate, then the first gear ring drives a first planet wheel to rotate around a first pin shaft, and the first pin shaft is connected with a box body, so that the first planet wheel is fixed relative to the box body, the lubrication of the first planet wheel is facilitated, the lubrication effect is improved, and finally the first planet wheel which rotates drives a first sun wheel to rotate, and power output is realized. Compared with the prior art, the planetary carrier is not arranged in the first planetary transmission structure, so that the production cost is reduced, the installation stability of the first planetary is improved, the sealing problem between the box body and the planetary carrier is not needed to be considered, the design difficulty is reduced, and the lubrication effect on the first planetary transmission structure is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a cross-sectional view of a gearbox provided in an embodiment of the present utility model.
The figures are labeled as follows:
1. a case;
2. a first planetary transmission structure; 21. a first sun gear; 22. a first ring gear; 23. a first planet; 24. a first pin;
31. a main shaft; 32. a main shaft bearing seat; 33. a first bearing;
4. a second planetary transmission structure; 41. a second sun gear; 42. a second ring gear; 43. a planet carrier; 431. a first connection portion; 44. a second planet wheel; 45. a second bearing; 46. a second pin;
51. an output gear; 511. a gear shaft portion; 52. a third bearing;
61. an output gear shaft; 62. a fourth bearing;
7. a turret flange; 71. a flange connection portion; 8. and (5) a generator.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
As shown in fig. 1, the present embodiment provides a drive chain including a gear box including a case 1, a first planetary drive structure 2, and a main shaft 31.
Specifically, the first planetary transmission structure 2 includes a first sun gear 21, a first gear ring 22, a plurality of first pins 24, and a plurality of first planetary gears 23, where the plurality of first planetary gears 23 are annularly disposed and engaged with the first sun gear 21, the first gear ring 22 is annularly disposed and engaged with the plurality of first planetary gears 23, the first pins 24 are mounted on the case 1, and each first planetary gear 23 is disposed on one first pin 24; the main shaft 31 is rotatably connected to the casing 1, and the main shaft 31 is connected to the first ring gear 22.
When the planetary gear box works, firstly, the main shaft 31 drives the first gear ring 22 to rotate, then the first gear ring 22 drives the first planetary gear 23 to rotate around the first pin shaft 24, and as the first pin shaft 24 is connected with the box body 1, the first planetary gear 23 is fixed relative to the box body 1, the lubrication of the first planetary gear 23 is facilitated, the lubrication effect is improved, and finally, the first planetary gear 23 which rotates drives the first sun gear 21 to rotate, so that the power output is realized. Compared with the prior art, the planetary carrier is not arranged in the first planetary transmission structure 2, so that the production cost is reduced, the installation stability of the first planetary gear 23 is improved, the sealing problem between the box body 1 and the planetary carrier is not needed to be considered, the design difficulty is reduced, and the lubrication effect on the first planetary transmission structure 2 is improved.
In this embodiment, the gear box further comprises a turret flange 7, and the turret flange 7 is provided with two flange connection portions 71 at intervals in the radial direction, one flange connection portion 71 being for connecting the main shaft 31, and the other flange connection portion 71 being for connecting the first ring gear 22. In the present embodiment, the small-diameter flange connection portion 71 is connected to the main shaft 31 by a screw, and the large-diameter flange connection portion 71 is connected to the first ring gear 22 by a screw. Preferably, the small-diameter flange connection portion 71 extends in a direction approaching the main shaft 31 with a first thickened portion and the large-diameter flange connection portion 71 extends in a direction approaching the main shaft 31 with a second thickened portion without interfering with other components, and therefore, the thickness of the two flange connection portions 71 is larger than the thickness of the main body of the turret flange 7, and the connection strength between the turret flange 7 and the main shaft 31 and the first ring gear 22 can be improved.
The gearbox further comprises a spindle bearing block 32, the spindle bearing block 32 being connected to the end of the box 1, the spindle 31 being rotatably connected to the spindle bearing block 32. The spindle bearing seat 32 is connected to the end of the box 1 through screws, two first bearings 33 are disposed on the outer wall of the spindle 31 at intervals, and the two first bearings 33 are disposed between the spindle bearing seat 32 and the spindle 31, so that the rotation stability and reliability of the spindle 31 are improved.
Preferably, the gearbox further comprises a second planetary transmission structure 4, the second planetary transmission structure 4 comprises a second sun gear 41, a second gear ring 42, a planet carrier 43, a plurality of second pin shafts 46 and a plurality of second planet gears 44, the plurality of second planet gears 44 are annularly arranged and meshed with the second sun gear 41, the second gear ring 42 is annularly arranged and meshed with the plurality of second planet gears 44, the second gear ring 42 is fixed on the box body 1, the second pin shafts 46 are mounted on the planet carrier 43, each second planet gear 44 is arranged on one second pin shaft 46, and the first sun gear 21 is connected with the planet carrier 43. The planet carrier 43 is provided with a tubular first connection portion 431, the first sun gear 21 is provided with a first connection hole, the first connection portion 431 is disposed in the first connection hole in a penetrating manner, and the first connection portion 431 is connected with the first connection hole through a spline, so that the first sun gear 21 is connected with the planet carrier 43 of the second planetary transmission structure 4. In operation, the first sun gear 21 can drive the planet carrier 43 to rotate, and the planet carrier 43 drives the plurality of second planet gears 44 to rotate around the axis of the second planetary transmission structure 4, so as to drive the second sun gear 41 to rotate, thereby reducing the output rotation speed of the gearbox step by step.
Preferably, the planet carrier 43 is rotatably connected to the housing 1 via a second bearing 45, increasing the robustness of the second planetary transmission structure 4.
Preferably, the plurality of second planetary transmission structures 4 are provided, and the plurality of second planetary transmission structures 4 are sequentially connected along the axial direction of the second planetary transmission structure 4, and the second sun gear 41 of the former second planetary transmission structure 4 is connected to the planet carrier 43 of the latter second planetary transmission structure 4. In this embodiment, the first planetary transmission structure 2 and the plurality of second planetary transmission structures 4 form a planetary stage, and the output rotation speed of the gear box is further reduced. The second sun gear 41 is provided with a second connecting hole, the first connecting portion 431 of the subsequent planet carrier 43 is inserted into the second connecting hole of the previous second sun gear 41, and the first connecting portion 431 is connected with the second connecting hole through a spline, so that the second sun gear 41 of the previous second planetary transmission structure 4 is connected with the planet carrier 43 of the subsequent second planetary transmission structure 4.
In this embodiment, the number of the second planetary transmission structures 4 is two, namely a second planetary structure and a third planetary structure, the planetary carrier 43 of the second planetary structure is connected to the first sun gear 23, the second sun gear 41 of the second planetary structure is connected to the planetary carrier 43 of the third planetary structure, and the first planetary transmission structure 2, the second planetary structure and the third planetary structure together form a series three-stage planetary transmission.
Further, the second sun gear 41 of the last second planetary transmission structure 4 is connected to the output gear 51, i.e. the second sun gear 41 of the three-stage planetary structure is connected to the output gear 51, the output gear 51 is provided with a gear shaft portion 511, and the second sun gear 41 is connected to the gear shaft portion 511 by a spline. The output gear 51 and the gear shaft 511 may be integrally formed, or may be a split structure, and in this embodiment, a split structure is adopted.
Preferably, the gear shaft portion 511 of the output gear 51 is rotatably connected to the inside of the casing 1 through the third bearing 52, improving rotational smoothness of the output gear 51.
In the prior art, for a transmission chain with a semi-direct drive structure, as the power of a wind power gear box is increased, the load and the rotating speed of a motor are increased, and the rotating speed of an output shaft can become a bottleneck. Preferably, the gearbox further comprises a plurality of output gear shafts 61, and the plurality of output gear shafts 61 are annularly arranged and in meshed connection with the output gear 51. The output gear 51 and the plurality of output gear shafts 61 form a parallel stage, the gear box drives the plurality of output gear shafts 61 to rotate through the output gear 51, power split is realized, the output is output through the plurality of output gear shafts 61, the design of integrated connection with the plurality of generators 8 is realized, the limit rotation speed of the output gear 51 is improved, and the weight and the cost of a transmission chain are reduced.
In this embodiment, the gearbox further includes a plurality of generators 8, where the plurality of generators 8 are in one-to-one correspondence with the plurality of output gears 51, and the generators 8 include a motor rotor and a motor stator, where the motor rotor is connected to the output gear shaft 61, and the motor stator is connected to the box 1. When the output gear shafts 61 drive the motor rotor to rotate, the generator 8 generates electricity, and each output gear shaft 61 can drive the generator 8 to generate electricity.
In the present embodiment, the rotation speed ratio between the output gear 51 and the plurality of output gear shafts 61 is the same so that the output power of the plurality of output gear shafts 61 is the same.
Further, the motor rotor is spline-connected to the output gear shaft 61; or the motor rotor is connected to the output gear shaft 61 through a flange; or the motor rotor is connected to the output gear shaft 61 through a coupling; or the motor rotor is connected to the output gear shaft 61 through a shrink disk.
Preferably, the output gear shaft 61 is rotatably coupled to the casing 1 through the fourth bearing 62, improving rotational smoothness of the output gear shaft 61.
In this embodiment, the gear box adopts a structure in which a planetary stage and a parallel stage are matched, the parallel stage adopts a power splitting mode, one output gear 51 drives a plurality of output gear shafts 61 to rotate, and each output gear shaft 61 can drive a plurality of independent generators 8 to work.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. A gearbox, comprising:
a case (1);
the first planetary transmission structure (2) comprises a first sun gear (21), a first gear ring (22), a plurality of first pin shafts (24) and a plurality of first planet gears (23), wherein the first planet gears (23) are annularly arranged and are meshed with the first sun gear (21), the first gear ring (22) is annularly arranged and is meshed with the first planet gears (23), the first pin shafts (24) are installed on the box body (1), and each first planet gear (23) is arranged on one first pin shaft (24);
and the main shaft (31) is rotatably connected to the box body (1), and the main shaft (31) is connected to the first gear ring (22).
2. The gearbox according to claim 1, further comprising a second planetary transmission structure (4), wherein the second planetary transmission structure (4) comprises a second sun gear (41), a second ring gear (42), a planet carrier (43), a plurality of second pins (46) and a plurality of second planet gears (44), wherein a plurality of the second planet gears (44) are annularly arranged and are meshed with the second sun gear (41), wherein the second ring gear (42) is annularly arranged and is meshed with the plurality of the second planet gears (44), wherein the second ring gear (42) is fixed on the box body (1), wherein the second pins (46) are mounted on the planet carrier (43), wherein each second planet gear (44) is arranged on one second pin (46), and wherein the first sun gear (21) is connected with the planet carrier (43).
3. Gearbox according to claim 2, characterized in that the second planetary transmission structure (4) is a plurality, a plurality of which second planetary transmission structures (4) are connected in succession along the axial direction of the second planetary transmission structure (4), the second sun wheel (41) of the former second planetary transmission structure (4) being connected to the planet carrier (43) of the latter second planetary transmission structure (4).
4. A gearbox according to claim 3, characterised in that the second sun wheel (41) of the last second planetary transmission structure (4) is connected to an output gear (51), the output gear (51) being rotatably connected to the housing (1).
5. The gearbox according to claim 4, further comprising a plurality of output gear shafts (61), wherein the output gear shafts (61) are rotatably connected to the housing (1), and wherein a plurality of the output gear shafts (61) are annularly and meshingly connected to the output gear (51).
6. The gearbox according to claim 5, further comprising a plurality of generators (8), the plurality of generators (8) being in one-to-one correspondence with the plurality of output gear shafts (61), the generators (8) comprising a motor rotor connected to the output gear shafts (61) and a motor stator connected to the box (1).
7. The gearbox according to claim 6, characterized in that the motor rotor is splined to the output gear shaft (61); or (b)
The motor rotor is connected to the output gear shaft (61) through a flange; or (b)
The motor rotor is connected with the output gear shaft (61) through a coupler; or (b)
The motor rotor is connected to the output gear shaft (61) by a shrink disk.
8. Gearbox according to any of the claims 1-7, further comprising a turret flange (7), which turret flange (7) is provided with two flange connections (71) at radial intervals, one of the flange connections (71) being intended to connect the main shaft (31) and the other flange connection (71) being intended to connect the first ring gear (22).
9. Gearbox according to any of the claims 1-7, further comprising a spindle bearing housing (32), the spindle bearing housing (32) being connected to the end of the box (1), the spindle (31) being rotatably connected to the spindle bearing housing (32).
10. A drive train comprising a gearbox according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320893400.4U CN220227691U (en) | 2023-04-20 | 2023-04-20 | Gear box and transmission chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320893400.4U CN220227691U (en) | 2023-04-20 | 2023-04-20 | Gear box and transmission chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220227691U true CN220227691U (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320893400.4U Active CN220227691U (en) | 2023-04-20 | 2023-04-20 | Gear box and transmission chain |
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| CN (1) | CN220227691U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428318A (en) * | 2023-04-20 | 2023-07-14 | 南京高速齿轮制造有限公司 | Gear box and transmission chain |
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2023
- 2023-04-20 CN CN202320893400.4U patent/CN220227691U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428318A (en) * | 2023-04-20 | 2023-07-14 | 南京高速齿轮制造有限公司 | Gear box and transmission chain |
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