Oil supply structure of planetary gearbox

Abstract

The utility model relates to the technical field of gearboxes, in particular to an oil supply structure of a planetary gearbox. The oil supply structure comprises a gear box body, a planet carrier, an oil supply ring and an elastic piece, and a first ring groove and a main oil duct with an outlet formed in the groove bottom of the first ring groove are formed in the gear box body; an oil supply channel is formed in the planet carrier; an annular oil inlet groove and an oil inlet hole communicated with the oil inlet groove are formed in one side of the oil supply ring, the oil supply ring is partially installed in the first annular groove, the oil inlet hole corresponds to the groove bottom of the first annular groove and is communicated with the main oil way, and the oil inlet groove is communicated with the oil supply channel. When the oil supply structure is used, the oil supply ring can be driven by the elastic force of the elastic piece to move towards the planet carrier and always keep a contact state with the planet carrier, and an axial gap is prevented from being generated between the planet carrier and the oil supply ring, so that the sealing performance between the oil inlet groove and the planet carrier is ensured; therefore, the stability of an oil path formed between the oil inlet groove and the oil supply channel is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, in particular to an oil supply structure of a planetary gear box. Background Art

[0002] For wind power gearboxes, the planetary lubrication effect plays a critical role in the operation of the entire gearbox. If there is poor lubrication, it will cause gearbox failure, thus affecting the use of the entire wind turbine generator set.

[0003] At present, the planetary-level lubrication oil supply structure of wind power gearbox mostly adopts the oil supply equipment to supply oil through the main oil channel opened on the gearbox body. The lubricating oil enters the oil supply ring groove of the oil supply ring after passing through the oil inlet hole on the oil supply ring from the main oil channel. The side of the oil supply ring with the oil supply ring groove is fitted with the planet carrier. The planet carrier is provided with an oil supply channel leading to the lubrication part. The lubricating oil in the oil supply ring groove is transported to the lubrication part through the oil supply channel on the planet carrier. The oil supply ring is fixed to the gearbox body by bolts.

[0004] Although this lubrication oil supply method can well lubricate the planetary stage of the gearbox, there are also some problems during use. Due to assembly adjustment or insufficient assembly accuracy, the assembly distance between the planet carrier and the gearbox body will change, which will cause an axial gap between the oil supply ring and the planet carrier, thereby affecting the sealing between the oil supply ring groove and the planet carrier, increasing the risk of lubricating oil leakage, resulting in insufficient oil supply due to reduced oil pressure, and having a negative impact on the lubrication effect. Utility Model Content

[0005] In view of the above-mentioned defects, the technical problem to be solved by the utility model is to provide an oil supply structure for a planetary gearbox, which can maintain the sealing between the oil inlet ring groove of the oil supply ring and the planetary carrier when the assembly distance between the planetary carrier and the gearbox body changes to a certain extent, thereby reducing the risk of lubricating oil leakage.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A planetary gearbox oil supply structure, comprising:

[0008] A gearbox body, wherein the gearbox body is provided with a first annular groove, and a main oil passage with an outlet arranged at the bottom of the first annular groove;

[0009] A planet carrier, wherein an oil supply passage is provided on the planet carrier;

[0010] An oil supply ring, one side of which is provided with an annular oil inlet groove and an oil inlet hole connected to the oil inlet groove, the oil supply ring is partially installed in the first annular groove, the oil inlet hole corresponds to the groove bottom of the first annular groove and is connected to the main oil channel, and the oil inlet groove is connected to the oil supply channel;

[0011] An elastic member is disposed between the oil supply ring and the first ring groove, and is used to make the oil supply ring have a tendency to approach the planet carrier.

[0012] By adopting the above solution, when the distance between the planetary carrier and the gearbox body changes due to insufficient assembly precision or reassembly of the planetary carrier, the elastic force of the elastic member can drive the oil supply ring to move toward the planetary carrier and always keep in contact with the planetary carrier, preventing the axial gap between the planetary carrier and the oil supply ring, thereby ensuring the sealing between the oil inlet groove and the planetary carrier, and further ensuring the stability of the oil path formed between the oil inlet groove and the oil supply channel. In the process of the oil supply ring moving toward the planetary carrier, since part of the oil supply ring is located in the first ring groove, the oil supply ring and the inner wall of the first ring groove still have good sealing, further ensuring the stability of the oil supply.

[0013] The utility model is further configured such that a first pin hole is provided on the gear box body, the first pin hole is communicated with the first ring groove, and the elastic member is partially installed in the first pin hole. Since the elastic member is partially installed in the first pin hole, the elastic member is easier to install and has better stability.

[0014] The utility model is further configured to include an adjusting screw, the adjusting screw is threadedly connected in the first pin hole, one end of the adjusting screw is against the elastic member, and the elastic member can slide in the first pin hole. The elastic force of the elastic member on the oil supply ring can be adjusted by the adjusting screw, thereby adjusting the pressing force between the contact surface of the oil supply ring and the planetary carrier. On the one hand, it can avoid that the oil supply ring and the planetary carrier are too tight, thereby affecting the rotation of the planetary carrier relative to the oil supply ring; on the other hand, when the axial displacement of the oil supply ring exceeds the length of the elastic member in the natural state, the elastic member can be pushed in by the adjusting screw, so that the elastic member moves toward the oil supply ring, so that the elastic member presses against the oil supply ring, so that the oil supply ring contacts the planetary carrier.

[0015] The utility model is further configured that the oil supply ring is provided with a first limiting groove for the elastic member to be inserted, and one end of the elastic member away from the gear box body is installed in the first limiting groove. Since one end of the elastic member is installed in the first limiting groove, the connection between the elastic member and the oil supply ring is more stable due to the restriction of the first limiting groove.

[0016] The utility model is further configured such that at least one second pin hole is provided on the gearbox body, a second limiting groove corresponding to the second pin hole is provided on the side of the oil supply ring close to the first ring groove, an anti-rotation pin is inserted into the second pin hole, and a part of the anti-rotation pin is inserted into the second limiting groove. The second pin hole and the second limiting groove are connected by the anti-rotation pin, which can prevent the oil supply ring from being driven to rotate by the planet carrier, thereby avoiding the misalignment of the oil inlet hole and the outlet of the main oil channel, and thus ensuring the stability of the oil inlet oil circuit.

[0017] The utility model is further configured that a plurality of second pin holes are opened on the gearbox body along the circumferential direction. Since a plurality of second pin holes are provided, the number of anti-rotation pins and second limiting grooves is increased accordingly, and the stability of the oil circuit is further enhanced through the plurality of anti-rotation pins.

[0018] The utility model is further configured that the elastic member is a spring. The elastic member is a spring, and since the spring is deformed mainly along the longitudinal direction of the spring when it is elastically compressed, the spring is more suitable for being installed in the first pin hole.

[0019] The utility model is further configured such that a second annular groove is provided on the planet carrier, the entrance of the oil supply channel is provided at the bottom of the second annular groove, part of the oil supply ring is installed in the second annular groove, and the side of the oil supply ring that provides the oil inlet groove contacts the bottom of the second annular groove. Since the planet carrier is provided with the second annular groove, the second annular groove can ensure that the oil supply ring is aligned with the axis of the planet carrier, thereby facilitating the positioning of the oil supply ring on the planet carrier.

[0020] The utility model is further configured that a plurality of sealing ring grooves are provided on one side of the oil supply ring where the oil inlet groove is provided, and the sealing performance between the contact surface of the oil supply ring and the first ring groove is further ensured by the sealing ring grooves.

[0021] The utility model is further configured that the inner ring side and the outer ring side of the oil supply ring are both provided with sealing rings, and the two sealing rings are respectively used to seal the gap between the inner ring side and the outer ring side of the oil supply ring and the corresponding side of the first ring groove. The two sealing rings further ensure the sealing between the oil supply ring and the first ring groove.

[0022] In summary, the planetary gearbox oil supply structure provided by the utility model has at least the following beneficial effects compared with the prior art:

[0023] 1. Since the elastic force of the elastic part can drive the oil supply ring to move toward the planetary carrier and always keep in contact with the planetary carrier, it can ensure that when the distance between the planetary carrier and the gearbox body changes within a certain range, there is still good sealing between the oil inlet groove and the planetary carrier, thereby ensuring the stability of the oil path formed between the oil inlet groove and the oil supply channel.

[0024] 2. Since part of the oil supply ring is located in the first ring groove and matches the first ring groove, even if there is a certain gap between the oil supply ring and the bottom of the first ring groove, there is still good sealing between the oil supply ring and the inner wall of the first ring groove, which further ensures the stability of oil supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any novel labor.

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure 2 yes Figure 1 The enlarged view at a in the middle;

[0028] Figure 3 This is the front view of the oil supply ring in the utility model;

[0029] Figure 4-6 In order Figure 3 Cross-sectional views at AA, BB and CC.

[0030] Figure numerals: 1. gear box body, 2. first ring groove, 3. main oil channel, 4. planetary carrier, 5. oil supply channel, 6. oil supply ring, 7. oil inlet groove, 8. oil inlet hole, 9. elastic member, 10. first pin hole, 11. adjusting screw, 12. first limiting groove, 13. second limiting groove, 14. second ring groove, 15. sealing ring groove, 16. sealing ring, 17. planetary bearing. DETAILED DESCRIPTION

[0031] In order to make those skilled in the art better understand the technical solution of the utility model, the following Figure 1-6 The utility model is further described in detail with specific implementation methods.

[0032] See also Figure 1-6The present embodiment provides an oil supply structure for a planetary gearbox, comprising a gearbox body 1, a planet carrier 4 and an oil supply ring 6, wherein the gearbox body 1 is provided with a first annular groove 2 and a main oil passage 3 whose outlet is arranged at the bottom of the first annular groove 2. The gearbox body 1 in the present embodiment may also be a part connected to the gearbox on an existing gearbox. When in use, the existing oil supply device supplies oil to the main oil passage 3 through the inlet of the main oil passage 3. The planet carrier 4 is provided with an oil supply passage 5, and the outlet of the oil supply passage 5 on the planet carrier 4 is provided at a part that needs lubrication in the existing planetary gear structure, for example, it may be at a position corresponding to the planetary bearing 17. The left side of the oil supply ring 6 is provided with an annular oil inlet groove 7 and an oil inlet hole 8 connected to the oil inlet groove 7, and the outlet of the oil inlet hole 8 corresponds to the bottom of the oil inlet groove 7. The inlet of the oil inlet hole 8 corresponds to the bottom of the first annular groove 2 and is connected to the main oil passage 3, and the oil inlet groove 7 is connected to the oil supply passage 5. The oil supply ring 6 is partially installed in the first ring groove 2. Specifically, the left section of the oil supply ring 6 is installed in the first ring groove 2. The oil supply ring 6 is concentrically arranged with the first ring groove 2. The oil supply ring 6 matches the first ring groove 2, thereby ensuring that the inner ring side and the outer ring side of the oil supply ring 6 are respectively in contact with the two side walls of the first ring groove 2, thereby ensuring the sealing performance. The elastic member 9 is arranged between the oil supply ring 6 and the first ring groove 2. The elastic member 9 is used to make the oil supply ring 6 have a tendency to approach the planetary carrier 4. The elastic member 9 is a spring. In order to meet the supply demand of lubricating oil, the main oil channel 3 on the gearbox body 1 can be opened in a plurality along the circumferential direction. Accordingly, the oil inlet hole 8 on the oil supply ring 6 and the oil supply channel 5 on the planetary carrier 4 are both opened in a plurality along the circumferential direction.

[0033] By adopting the above solution, when the planet carrier 4 is in use, when the distance between the planet carrier 4 and the gear box body 1 changes due to insufficient assembly accuracy or reassembly, the elastic force of the elastic member 9 can drive the oil supply ring 6 to move toward the planet carrier 4, and always maintain contact with the planet carrier 4, preventing the axial gap between the planet carrier 4 and the oil supply ring 6, thereby ensuring the sealing between the oil inlet groove 7 and the planet carrier 4, and further ensuring the stability of the oil path formed between the oil inlet groove 7 and the oil supply channel 5. In the process of the oil supply ring 6 moving toward the planet carrier 4, since part of the oil supply ring 6 is located in the first ring groove 2 and matches the first ring groove 2, the oil supply ring 6 and the inner wall of the first ring groove 2 still have good sealing, further ensuring the stability of oil supply.

[0034] In order to enhance the sealing between the oil supply ring 6 and the first ring groove 2 , further, sealing rings 16 are provided on the inner and outer sides of the oil supply ring 6 . The two sealing rings 16 are respectively used to seal the gaps between the inner and outer sides of the oil supply ring 6 and the corresponding sides of the first ring groove 2 .

[0035] In order to facilitate the installation of the elastic member 9, further, a first pin hole 10 is provided on the gear box body 1, the first pin hole 10 is communicated with the first annular groove 2, the outlet of the first pin hole 10 is specifically located at the bottom of the first annular groove 2, and the elastic member 9 is partially installed in the first pin hole 10. Since the elastic member 9 is partially installed in the first pin hole 10, it is easier to install the elastic member 9 and has better stability.

[0036] In order to adjust the elastic force of the elastic member 9, further, an adjusting screw 11 is included. The adjusting screw 11 is threadedly connected in the first pin hole 10, and one end of the adjusting screw 11 abuts against the elastic member 9, and the elastic member 9 can slide in the first pin hole 10. The elastic force of the elastic member 9 on the oil supply ring 6 can be adjusted by adjusting the screw 11, so as to adjust the pressing force between the contact surface of the oil supply ring 6 and the planetary carrier 4. On the one hand, it can prevent the oil supply ring 6 and the planetary carrier 4 from being too tight, thereby affecting the rotation of the planetary carrier 4 relative to the oil supply ring 6; on the other hand, when the axial displacement of the oil supply ring 6 exceeds the length of the elastic member 9 in the natural state, the elastic member 9 can be pushed into the adjusting screw 11, so that the elastic member 9 moves toward the oil supply ring 6, so that the elastic member 9 abuts against the oil supply ring 6, so that the oil supply ring 6 contacts the planetary carrier 4. In addition, the adjusting screw 11 also seals the first pin hole 10 well to prevent oil leakage at the first pin hole 10.

[0037] In order to enhance the stability of the connection between the elastic member 9 and the oil supply ring 6, a first limiting groove 12 for inserting the elastic member 9 is further provided on the oil supply ring 6, the left end of the elastic member 9 is away from the gearbox body 1, and the left end of the elastic member 9 is installed in the first limiting groove 12. Since one end of the elastic member 9 is installed in the first limiting groove 12, the connection between the elastic member 9 and the oil supply ring 6 is more stable due to the restriction of the first limiting groove 12.

[0038] In order to prevent the friction of the planet carrier 4 from driving the oil supply ring 6 to rotate when rotating, thereby affecting the stability of the oil circuit between the oil inlet hole 8 and the main oil channel 3, further, at least one second pin hole is provided on the gearbox body 1. A second limiting groove 13 corresponding to the second pin hole is provided on the side of the oil supply ring 6 close to the first ring groove 2, and an anti-rotation pin is inserted into the second pin hole, and part of the anti-rotation pin is inserted into the second limiting groove 13. Multiple second pin holes are provided on the gearbox body 1 along the circumferential direction, and preferably six are provided in this embodiment. Six second limiting grooves 13 are provided on the oil supply ring 6, and the six second limiting grooves 13 correspond to the six second pin holes one by one.

[0039] In order to facilitate the assembly of the oil supply ring 6 and the planet carrier 4, a second annular groove 14 is further provided on the planet carrier 4, and the entrance of the oil supply channel 5 is provided at the bottom of the second annular groove 14. Part of the oil supply ring 6 is installed in the second annular groove 14, specifically, the left section of the oil supply ring 6 is installed in the second annular groove 14, and the left side of the oil supply ring 6 contacts the bottom of the second annular groove 14.

[0040] In order to enhance the sealing performance between the left side of the oil supply ring 6 and the bottom of the second ring groove 14, further, a plurality of sealing ring grooves 15 are provided on the side of the oil supply ring 6 where the oil inlet groove 7 is provided, and all the sealing ring grooves 15 are arranged concentrically with the oil supply ring 6. Specifically, a total of six sealing ring grooves 15 are provided on the left side of the oil supply ring 6, and all the sealing ring grooves 15 are located outside the oil inlet groove 7, of which three sealing ring grooves 15 are located on the upper section of the left side surface of the oil supply ring 6, and the other three sealing ring grooves 15 are located on the lower section of the left side surface of the oil supply ring 6.

[0041] It should be noted that the words indicating direction in this article, such as up and down, are all based on Figure 1 The setting of the direction is only for the convenience of description and has no other specific meaning.

[0042] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A planetary gearbox oil supply structure, characterized in that: include: A gearbox body (1), wherein the gearbox body (1) is provided with a first annular groove (2), and a main oil passage (3) whose outlet is arranged at the bottom of the first annular groove (2); A planet carrier (4), wherein an oil supply passage (5) is provided on the planet carrier (4); An oil supply ring (6), one side of the oil supply ring (6) is provided with an annular oil inlet groove (7) and an oil inlet hole (8) connected to the oil inlet groove (7), the oil supply ring (6) is partially installed in the first annular groove (2), the oil inlet hole (8) corresponds to the groove bottom of the first annular groove (2) and is connected to the main oil channel (3), and the oil inlet groove (7) is connected to the oil supply channel (5); An elastic member (9) is arranged between the oil supply ring (6) and the first ring groove (2), and the elastic member (9) is used to make the oil supply ring (6) have a tendency to approach the planet carrier (4).

2. A planetary gearbox oil supply structure as claimed in claim 1, characterized in that: The gear box body (1) is provided with a first pin hole (10), the first pin hole (10) is communicated with the first annular groove (2), and the elastic member (9) is partially installed in the first pin hole (10).

3. A planetary gearbox oil supply structure as claimed in claim 2, characterized in that: It also includes an adjusting screw (11), which is threadedly connected in the first pin hole (10), one end of the adjusting screw (11) abuts against the elastic member (9), and the elastic member (9) can slide in the first pin hole (10).

4. A planetary gearbox oil supply structure as claimed in claim 2 or 3, characterized in that: The oil supply ring (6) is provided with a first limiting groove (12) for inserting the elastic member (9), and one end of the elastic member (9) away from the gear box body (1) is installed in the first limiting groove (12).

5. The planetary gearbox oil supply structure according to claim 4, characterized in that: At least one second pin hole is provided on the gearbox body (1); a second limiting groove (13) corresponding to the second pin hole is provided on a side of the oil supply ring (6) close to the first ring groove (2); an anti-rotation pin is inserted into the second pin hole, and a portion of the anti-rotation pin is inserted into the second limiting groove (13).

6. The oil supply structure of a planetary gearbox as claimed in claim 5, characterized in that: A plurality of second pin holes are provided on the gear box body (1) along the circumferential direction.

7. The oil supply structure of a planetary gearbox according to claim 1, characterized in that: The elastic member (9) is a spring.

8. The oil supply structure of a planetary gearbox as claimed in claim 1, characterized in that: A second annular groove (14) is provided on the planet carrier (4), an entrance of the oil supply channel (5) is provided at the bottom of the second annular groove (14), a portion of the oil supply ring (6) is installed in the second annular groove (14), and a side of the oil supply ring (6) where the oil inlet groove (7) is provided is in contact with the bottom of the second annular groove (14).

9. The planetary gearbox oil supply structure according to claim 8, characterized in that: A plurality of sealing ring grooves (15) are formed on one side of the oil supply ring (6) where the oil inlet groove (7) is formed.

10. The planetary gearbox oil supply structure according to claim 1, characterized in that: The inner ring side and the outer ring side of the oil supply ring (6) are both provided with sealing rings (16), and the two sealing rings (16) are respectively used to seal the gaps between the inner ring side and the outer ring side of the oil supply ring (6) and the corresponding sides of the first ring groove (2).

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