CN114483887A

CN114483887A - Planetary transmission structure

Info

Publication number: CN114483887A
Application number: CN202210134519.3A
Authority: CN
Inventors: 高卫明; 张先江; 张雪娇
Original assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Current assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-05-13

Abstract

The invention relates to the technical field of wind power generation and discloses a planetary transmission structure. The planetary transmission structure comprises a box body, a first planet carrier, a second planet carrier and a slip ring. A first oil way is arranged in the box body; the first planet carrier is rotatably arranged on one side of the box body, and a second oil way is arranged in the first planet carrier; the second planet carrier is rotatably arranged on the other side of the box body, and a third oil way is arranged in the second planet carrier; the first end surface of the slip ring is concavely arranged towards the second end surface to form a first annular groove, and the first end part of the first planet carrier is inserted into the first annular groove from the first end surface and is installed in the first annular groove; the second end surface is concavely arranged towards the first end surface to form a second annular groove, and the second end part of the second planet carrier is inserted into the second annular groove from the second end surface and is installed in the second annular groove; the outer peripheral surface of sliding ring is laminated in the box, and the outer peripheral surface of sliding ring is provided with the first inlet port with first oil circuit and second oil circuit intercommunication, is provided with the second inlet port with second oil circuit and third oil circuit intercommunication in the second annular groove of sliding ring.

Description

Planetary transmission structure

Technical Field

The invention relates to the technical field of wind power generation, in particular to a planetary transmission structure.

Background

Wind power, as a renewable energy source, has strong advantages in generating electricity, such as: compared with thermal power generation, solar power generation, hydraulic power generation and other energy sources, the solar power generation system has the advantages of low construction cost, small floor area, convenience in maintenance and the like.

The wind power gear box of a large megawatt double-fed type machine type adopts a structure that two-stage planets are combined with one-stage parallelism, wherein the lubrication of planet wheel bearings of the two-stage planets is particularly important. In a traditional planet wheel bearing lubricating structure, slip rings are respectively designed between a planet carrier and a box body, and lubricating oil in the box body is respectively introduced into a lubricating oil path of an LSS (least square) planet carrier and a lubricating oil path of an ISS (inverse standard system) planet carrier, so that a two-stage planet wheel bearing is lubricated. The traditional design needs two slip rings, lubricate two-stage planet wheel bearing respectively. Because two slip rings are needed, the purchasing cost and the processing cost are higher, the cost is not reduced, the axial size of the wind power gear box is increased, and the wind power gear box is inconvenient to install and maintain.

Based on this, a planetary transmission structure is needed to solve the above existing problems.

Disclosure of Invention

Based on the above, the invention aims to provide a planetary transmission structure, which achieves the purpose of simultaneously lubricating two stages of planets respectively through one slip ring, thereby achieving the purposes of reducing the size of the planetary transmission structure and reducing the production cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

a planetary transmission structure comprising:

the oil pump comprises a box body, a first oil way and a second oil way, wherein the box body is internally provided with the first oil way;

the first planet carrier is rotatably arranged on one side of the box body, and a second oil way is arranged in the first planet carrier;

the second planet carrier is rotatably arranged on the other side of the box body, and a third oil way is arranged in the second planet carrier;

the sliding ring comprises a first end face close to the first planet carrier and a second end face close to the second planet carrier, the first end face is concavely arranged towards the second end face to form a first annular groove, and the first end part of the first planet carrier is inserted into the first annular groove from the first end face and is installed in the first annular groove; the second end surface is concavely arranged towards the first end surface to form the second annular groove, and the second end part of the second planet carrier is inserted into the second annular groove from the second end surface and is installed in the second annular groove; the outer peripheral surface of the sliding ring is attached to the box body, a first oil inlet communicated with the first oil way and the second oil way is formed in the outer peripheral surface of the sliding ring, and a second oil inlet communicated with the second oil way and the third oil way is formed in the second annular groove of the sliding ring.

As a preferred technical scheme of the planetary transmission structure, a first annular oil path is arranged between the box body and the outer peripheral surface of the slip ring, and the first oil inlet and the first oil path are both communicated with the first annular oil path;

and a second annular oil way is arranged between the second annular groove of the slip ring and the second planet carrier, and the second oil inlet hole and the third oil way are both communicated with the second annular oil way.

As a preferable technical solution of the planetary transmission structure, the first end and the second end at least partially coincide along an axial direction of the planetary transmission.

As a preferable technical scheme of the planetary transmission structure, a third annular oil path is provided between an inner wall of the first annular groove and an end of the first planet carrier, and the first oil inlet hole, the second oil inlet hole and the second oil path are all communicated with the third annular oil path.

As a preferable technical solution of the planetary transmission structure, the second annular groove is a through hole penetrating through the first end surface and the second end surface, an inner circumferential surface of the slip ring is formed on an inner surface of the through hole, and the second oil inlet is formed in the inner circumferential surface of the slip ring.

As a preferred embodiment of the planetary transmission, the second end has an outer diameter smaller than an inner diameter of the first end, and the second end is inserted into the through hole of the slip ring from the second end surface of the slip ring and extends into the first end of the first carrier.

As a preferred technical solution of the planetary transmission structure, the first annular groove of the slip ring is in interference connection with the first end of the first planet carrier or is fixedly connected with the first end of the first planet carrier through a screw. .

As a preferred technical scheme of the planetary transmission structure, a first bearing is arranged between the first planet carrier and the box body;

a second bearing is arranged between the second planet carrier and the box body;

a first side oil way is arranged in the box body, one end of the first side oil way is communicated with the first oil way, and the other end of the first side oil way is communicated with the first bearing;

and a second side oil way is arranged in the box body, one end of the second side oil way is communicated with the first oil way, and the other end of the second side oil way is communicated with the second bearing.

As a preferable technical scheme of the planetary transmission structure, the first oil inlet hole and the second oil inlet hole are plural, each of the first oil inlet holes corresponds to the second oil passage, and each of the second oil inlet holes corresponds to the third oil passage.

As a preferred technical scheme of the planetary transmission structure, the first oil inlet hole and the second oil inlet hole are arranged in a right-to-side mode along the axis direction of the planetary transmission.

The invention has the beneficial effects that:

the invention provides a planetary transmission structure, wherein planetary gears are arranged on a first planetary carrier and a second planetary carrier, the first planetary carrier and the second planetary carrier are respectively rotatably arranged on two sides of a box body, two-stage planetary gear transmission is realized, in the planetary transmission structure, in operation, lubricating oil enters the box body through a first oil path of the box body and then enters a second oil path through a first oil inlet hole to lubricate the planetary gears on the first planetary carrier, the lubricating oil in the second oil path can also enter a third oil path through a second oil inlet hole to lubricate the planetary gears on the second planetary carrier, and the purpose of simultaneously and respectively lubricating two-stage planetary gears through a slip ring is realized, so that the purposes of reducing the size of the planetary transmission structure and reducing the production cost are realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a structural cross-sectional view of a planetary transmission configuration provided in accordance with an embodiment of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an exploded view of a first perspective of a planetary transmission configuration provided in accordance with an embodiment of the present invention;

fig. 4 is a structural exploded view of a second perspective of a planetary transmission configuration provided by an embodiment of the present invention.

The figures are labeled as follows:

100. a planet wheel;

1. a box body; 11. a first oil passage;

2. a first carrier; 21. a second oil passage; 22. a third annular groove; 23. a first end portion; 24. a first housing section;

3. a second planet carrier; 31. a third oil passage; 32. a second annular groove; 33. a second end portion;

4. a slip ring; 41. a first annular groove; 42. a first oil inlet hole; 43. a second oil inlet hole; 44. a first annular groove; 45. a first end face; 46. a second end face; 47. a second annular groove;

5. a first annular oil passage; 6. a second annular oil passage; 7. a third annular oil passage; 8. a plug; 9. a first bearing; 10. a second bearing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and 2, the present embodiment provides a planetary transmission structure including a case 1, a first carrier 2, a second carrier 3, and a slip ring 4.

Specifically, a first oil path 11 is arranged in the box body 1; the first planet carrier 2 is rotatably arranged on one side of the box body 1, and a second oil way 21 is arranged in the first planet carrier 2; the second planet carrier 3 is rotatably mounted on the other side of the box body 1, and a third oil path 31 is arranged in the second planet carrier 3.

The slip ring 4 comprises a first end face 45 close to the first planet carrier 2 and a second end face 46 close to the second planet carrier 3, the first end face 45 is concavely arranged towards the second end face 46 to form a first annular groove 41, and the first end part 23 of the first planet carrier 2 is inserted into the first annular groove 41 from the first end face 45 and is installed in the first annular groove 41; the second end surface 46 is recessed towards the first end surface 45 to form a second annular groove 47, and the second end part 33 of the second planet carrier 3 is inserted into the second annular groove 47 from the second end surface 46; the outer peripheral surface of the slip ring 4 is fitted to the case 1, the outer peripheral surface of the slip ring 4 is provided with a first oil inlet 42 communicating with the first oil passage 11 and the second oil passage 21, and the second annular groove 47 of the slip ring 4 is provided with a second oil inlet 43 communicating with the second oil passage 21 and the third oil passage 31. In the present application, in order to reduce the axial dimension of the two-stage planetary transmission structure, the first end portion 23 and the second end portion 33 at least partially coincide in the axial direction of the planetary transmission.

In a specific embodiment, the second annular groove 47 formed by the second end surface 46 being recessed toward the first end surface 45 is a through hole penetrating through the first end surface 45 and the second end surface 46, an inner surface of the through hole is an inner circumferential surface of the slip ring 4, the second end portion 33 of the second carrier 3 is inserted into the through hole of the slip ring 4 from the second end surface 46, and an outer circumferential surface of the second end portion 33 is attached to the inner circumferential surface of the slip ring 4. The inner peripheral surface of the slip ring 4 is provided with a second oil inlet hole 43 communicating with the second oil passage 21 and the third oil passage 31. The first end portion 23 of the first carrier 2 has a first receiving portion 24, the second end portion 33 has an outer diameter smaller than an inner diameter of the first end portion 23, and the second end portion 33 is inserted into the through hole of the slip ring 4 from the second end face 46 of the slip ring 4 and extends into the first receiving portion 24 of the first carrier 2.

It should be noted that, in this embodiment, the first planet carrier 2 is an LSS planet carrier, that is, a low-speed stage planet carrier; the second planet carrier 3 is an ISS planet carrier, i.e. an intermediate stage planet carrier, the first planet carrier 2 and the second planet carrier 3 are both provided with planet wheels 100, and the second oil path 21 is connected to the planet wheels 100 on the first planet carrier 2, and the third oil path 31 is connected to the planet wheels 100 on the second planet carrier 3.

Wherein, first planet carrier 2 and second planet carrier 3 are rotatable respectively and are installed in box 1 both sides, realize the transmission of two-stage planet wheel 100, this planetary transmission structure is at work, lubricating oil gets into in box 1 through the first oil circuit 11 of box 1, then get into in the second oil circuit 21 through first inlet port 42, lubricate planet wheel 100 on the first planet carrier 2, lubricating oil in the second oil circuit 21 can also get into in the third oil circuit 31 through second inlet port 43, lubricate planet wheel 100 on the second planet carrier 3, realized carrying out lubricated purpose respectively to two-stage planet through a sliding ring 4 simultaneously, thereby realize having reduced planetary transmission structure's size, reduction in production cost's purpose.

In this embodiment, the outer diameter of the end of the second planet carrier 3 is the same as the diameter of the inner circumferential surface of the slip ring 4, and the slip ring 4 is sleeved on the end of the second planet carrier 3, so that the inner circumferential surface of the slip ring 4 is fitted to the second planet carrier 3, thereby reducing the axial size of the two-stage planetary transmission structure.

It should be noted that, the outer circumferential surface of the slip ring 4 is in clearance fit with the case 1 to ensure that the slip ring 4 and the case 1 can rotate relatively, and the inner circumferential surface of the slip ring 4 is in clearance fit with the second planet carrier 3 to ensure that the slip ring 4 and the second planet carrier 3 can rotate relatively.

Preferably, the number of the first oil inlet holes 42 and the number of the second oil inlet holes 43 are multiple, each first oil inlet hole 42 corresponds to the second oil path 21, each second oil inlet hole 43 corresponds to the third oil path 31, so that lubricating oil can uniformly enter the second oil path 21 of the first planet carrier 2 and the third oil path 31 of the second planet carrier 3, and uniform lubrication of bearings of the two-stage planet gear 100 is improved. Further, the first oil inlet hole 42 and the second oil inlet hole 43 are arranged to face each other in the axial direction of the planetary transmission.

Further, as shown in fig. 2-4, a first annular oil path 5 is provided between the case 1 and the outer peripheral surface of the slip ring 4, and both the first oil inlet 42 and the first oil path 11 are communicated with the first annular oil path 5; a second annular oil path 6 is arranged between the second annular groove 47 of the slip ring 4 and the second planet carrier 3, and the second oil inlet hole 43 and the third oil path 31 are both communicated with the second annular oil path 6. When the wind power gearbox works, the first planet carrier 2 and the slip ring 4 need to rotate relative to the box body 1, and the first annular oil way 5 can ensure that the first oil inlet hole 42 and the first oil way 11 are in a real-time conduction state, so that the transmission of lubricating oil is ensured; similarly, when the second planet carrier 3 and the first planet carrier 2 rotate relatively, the second annular oil path 6 can ensure that the second oil inlet 43 and the first oil path 11 are in a real-time conduction state, so that the transmission of lubricating oil is ensured, and the purpose of respectively lubricating two stages of planets through one slip ring 4 is realized.

At least one of the outer peripheral surfaces of the box body 1 and the slip ring 4 is provided with a first annular groove 44, and when the outer peripheral surface of the slip ring 4 is attached to the box body 1, a first annular oil path 5 is formed; in the present embodiment, the first annular groove 44 is provided on the outer wall of the outer peripheral surface of the slip ring 4; similarly, at least one of the inner peripheral surfaces of the second planet carrier 3 and the slip ring 4 is provided with a second annular groove 32, and when the inner peripheral surface of the slip ring 4 is fitted to the second planet carrier 3, a second annular oil path 6 is formed; in the present embodiment, the second annular groove 32 is provided on the second carrier 3.

Preferably, the first oil inlet 42 and the second oil inlet 43 are both kidney-shaped holes, so that the assembly convenience of the slip ring 4 and the first planet carrier 2 is improved, and the first oil inlet 42 and the second oil inlet 43 are respectively communicated with the second oil path 21. Further preferably, when the first planet carrier 2 or the second planet carrier 3 machines the second oil path 21 or the third oil path 31 in an machining manner, the oil path may be blocked by the plug 8, so as to ensure that the lubricating oil flows in the oil path in the preset direction.

To prevent the first oil inlet hole 42 and the second oil inlet hole 43 from not communicating with the second oil passage 21 due to an assembly error of the slip ring 4 with the first carrier 2. In this embodiment, a third annular oil path 7 is provided between the inner wall of the first annular groove 41 and the end of the first carrier 2, and the first oil inlet hole 42, the second oil inlet hole 43 and the second oil path 21 are all communicated with the third annular oil path 7, so as to ensure the communication state between the first oil inlet hole 42 and the second oil inlet hole 43 and the second oil path 21. One of the outer wall of the end portion of the first carrier 2 and the inner wall of the first annular groove 41 is provided with a third annular groove 22, and when the end portion of the first carrier 2 is inserted into and mounted in the first annular groove 41, a third annular oil passage 7 is formed between the first carrier 2 and the inner wall of the first annular groove 41, in this embodiment, the outer wall of the end portion of the first carrier 2 is provided with the third annular groove 22.

In this embodiment, after the end of the first carrier 2 extends into the first annular groove 41, the first annular groove 41 and the end of the first carrier 2 are fixedly connected by screws. Of course, in other embodiments, the first annular groove 41 is in interference connection with the end of the first carrier 2, so that the end of the first carrier 2 is fixed in the first annular groove 41.

Further, a first bearing 9 is arranged between the first planet carrier 2 and the box body 1 to realize rotatable connection between the first planet carrier 2 and the box body 1; a second bearing 10 is arranged between the second planet carrier 3 and the box body 1 to realize rotatable connection between the second planet carrier 3 and the box body 1. Preferably, a first side oil path is arranged in the box body 1, one end of the first side oil path is communicated with the first oil path 11, the other end of the first side oil path is communicated with the first bearing 9, and lubricating oil in the first oil path 11 can enter the first bearing 9 through the first side oil path to lubricate the first bearing 9; a second side oil way is arranged in the box body 1, one end of the second side oil way is communicated with the first oil way 11, the other end of the second side oil way is communicated with the second bearing 10, and lubricating oil in the first oil way 11 can enter the second bearing 10 through the second side oil way to provide lubrication for the second bearing 10.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention 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 invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A planetary transmission, comprising:

the oil pump comprises a box body (1), wherein a first oil way (11) is arranged in the box body (1);

the first planet carrier (2) is rotatably arranged on one side of the box body (1), and a second oil way (21) is arranged in the first planet carrier (2);

the second planet carrier (3) is rotatably arranged on the other side of the box body (1), and a third oil way (31) is arranged in the second planet carrier (3);

the slip ring (4) comprises a first end face (45) close to the first planet carrier (2) and a second end face (46) close to the second planet carrier (3), the first end face (45) is concave towards the second end face (46) to form a first annular groove (41), and the first end part (23) of the first planet carrier (2) is inserted from the first end face (45) and installed in the first annular groove (41); the second end face (46) is concavely arranged towards the first end face (45) to form a second annular groove (47), and the second end part (33) of the second planet carrier (3) is inserted from the second end face (46) and is installed in the second annular groove (47); the outer peripheral surface of sliding ring (4) laminate in box (1), the outer peripheral surface of sliding ring (4) be provided with first oil circuit (11) with first oil inlet (42) of second oil circuit (21) intercommunication, sliding ring (4) be provided with in second ring channel (47) with second oil circuit (21) with second oil inlet (43) of third oil circuit (31) intercommunication.

2. The planetary transmission according to claim 1, wherein a first annular oil passage (5) is provided between the case (1) and the outer peripheral surface of the slip ring (4), and the first oil inlet hole (42) and the first oil passage (11) are both communicated with the first annular oil passage (5);

and a second annular oil way (6) is arranged between the second annular groove (47) of the slip ring (4) and the second planet carrier (3), and the second oil inlet hole (43) and the third oil way (31) are both communicated with the second annular oil way (6).

3. Planetary transmission according to claim 1, characterized in that the first end (23) and the second end (33) at least partially coincide in the direction of the axis of the planetary transmission.

4. The planetary transmission according to claim 1, characterized in that a third annular oil passage (7) is provided between the inner wall of the first annular groove (41) and the end of the first carrier (2), and the first oil inlet hole (42), the second oil inlet hole (43) and the second oil passage (21) are all communicated with the third annular oil passage (7).

5. The planetary transmission according to claim 1, wherein the second annular groove (47) is a through hole penetrating the first end surface (45) and the second end surface (46), an inner surface of the through hole forming an inner peripheral surface of the slip ring (4), and the second oil inlet hole (43) is provided at the inner peripheral surface of the slip ring (4).

6. Planetary transmission according to claim 5, characterized in that the second end (33) has an outer diameter smaller than the inner diameter of the first end (23), the second end (33) being inserted from the second end face (46) of the slip ring (4) into a through hole of the slip ring (4) and extending into the first end (23) of the first planet carrier (2).

7. Planetary transmission according to any of claims 1-6, characterized in that the first annular groove (41) of the slip ring (4) is connected with the first end (23) of the first planet carrier (2) by interference or by screw fixation.

8. Planetary transmission according to claim 1, characterized in that a first bearing (9) is arranged between the first planet carrier (2) and the casing (1);

a second bearing (10) is arranged between the second planet carrier (3) and the box body (1);

a first side oil way is arranged in the box body (1), one end of the first side oil way is communicated with the first oil way (11), and the other end of the first side oil way is communicated with the first bearing (9);

and a second side oil way is arranged in the box body (1), one end of the second side oil way is communicated with the first oil way (11), and the other end of the second side oil way is communicated with the second bearing (10).

9. The planetary transmission according to any one of claims 1 to 6, wherein the first oil inlet hole (42) and the second oil inlet hole (43) are plural, each of the first oil inlet holes (42) corresponds to the second oil passage (21), and each of the second oil inlet holes (43) corresponds to the third oil passage (31).

10. The planetary transmission structure according to claim 1, wherein the first oil inlet hole (42) and the second oil inlet hole (43) are disposed to face each other in an axial direction of the planetary transmission.