Three-stage planetary gearbox and oil distributing and lubricating structure thereof

Abstract

The invention discloses a three-stage planetary gearbox and an oil distributing and lubricating structure thereof. The three-stage planetary gearbox comprises a first planet carrier, a second planet carrier and a third planet carrier, the oil distributing and lubricating structure comprises a main oil way formed in the box body, a first wear-resisting ring arranged between the first planet carrier and the second planet carrier, a second wear-resisting ring arranged between the box body and the second planet carrier and a third wear-resisting ring arranged between the second planet carrier and the third planet carrier, a first oil way is arranged on the first planet carrier, and a second oil way is arranged on the second planet carrier. A ring sleeve is arranged between the first wear-resisting ring and the second planet carrier, a second oil way is arranged on the second planet carrier, a third oil way is arranged on the third planet carrier, and a connecting plate is arranged between the third wear-resisting ring and the third planet carrier. The integrated lubricating structure is designed, after lubricating oil is injected into the main oil way, the aim of lubricating all stages of planets can be achieved, meanwhile, complex oil way design conducted outside is avoided, the oil leakage risk of the gearbox is greatly reduced, and good practicability is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of gearbox lubrication, and in particular relates to a three-stage planetary gearbox and an oil separation lubrication structure thereof. Background Art

[0002] Gearboxes are widely used, for example, in wind turbines. Gearboxes are an important mechanical component that is widely used in wind turbines. Their main function is to transfer the power generated by the wind rotor to the generator and make it obtain a corresponding speed. Usually, the speed of the wind rotor is very low, far from the speed required by the generator to generate electricity. It must be achieved through the speed-increasing effect of the gear pair of the gearbox, so the gearbox is also called a speed-increasing box.

[0003] Common gearbox lubrication methods include gear oil lubrication, semi-fluid lubrication, grease lubrication, and solid lubricant lubrication. The lubrication system of the gearbox is of great significance to the normal operation of the gearbox. Large-scale wind power gearboxes must be equipped with a reliable forced lubrication system to spray oil lubricate the gear meshing area, planetary gear shafts, etc. In the prior art, each level of the planetary package in the three-stage planetary gearbox in the industry adopts an independent lubrication structure. This traditional structure is designed with multiple independent oil inlets to lubricate the lubrication points of the corresponding planetary packages. There are multiple oil circuits outside the structure, which has a potential risk of oil leakage. In summary, there is an urgent need for a three-stage planetary gearbox and its oil separation lubrication structure. Summary of the invention

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a three-stage planetary gearbox and an oil separation lubrication structure thereof.

[0005] On the one hand, the present invention provides an oil separation lubrication structure for a three-stage planetary gearbox, the three-stage planetary gearbox comprising a first planet carrier, a second planet carrier arranged at one end of the first planet carrier, and a third planet carrier arranged at one end of the second planet carrier away from the first planet carrier, the first planet carrier is provided with a first planetary gear shaft, the second planet carrier is provided with a second planetary gear shaft, the third planet carrier is provided with a third planetary gear shaft, a box body is provided outside the first planetary gear shaft, the oil separation lubrication structure comprises a main oil circuit opened in the box body, a first wear-resistant ring arranged between the first planet carrier and the second planet carrier, a second wear-resistant ring arranged between the box body and the second planet carrier, and a third wear-resistant ring arranged between the second planet carrier and the third planet carrier, wherein:

[0006] The first planet carrier is provided with a first oil passage connected to the first planetary gear shaft, the first wear-resistant ring is embedded in the end surface of the first planet carrier, a ring sleeve is provided between the first wear-resistant ring and the second planet carrier, the second planet carrier is provided with a second oil passage connected to the second planetary gear shaft, the second wear-resistant ring is embedded in the inner wall of the box body, the third planet carrier is provided with a third oil passage connected to the third planetary gear shaft, the third wear-resistant ring is provided on the inner wall of the second planet carrier, and a connecting plate is provided between the third wear-resistant ring and the third planet carrier;

[0007] The first oil circuit is connected to the second oil circuit through the first wear-resistant ring and the ring sleeve, the second oil circuit is connected to the main oil circuit through the second wear-resistant ring, and the second oil circuit is connected to the third oil circuit through the third wear-resistant ring and the connecting plate.

[0008] As a specific embodiment, in the above-mentioned oil-separated lubrication structure for a three-stage planetary gearbox, a first groove is provided on the end face of the first planetary carrier close to one end of the second planetary carrier, one end of the first wear-resistant ring is embedded in the first groove, and the other end is embedded in the ring sleeve, and a second groove is provided on the end of the second planetary carrier close to the first planetary carrier, and the ring sleeve is embedded in the second groove.

[0009] Furthermore, in the above-mentioned oil separation lubrication structure for a three-stage planetary gearbox, a first through hole connected to the first oil circuit is opened in the first wear-resistant ring, a first connecting hole connected to the second oil circuit is opened in the ring sleeve, and the first through hole is connected to the first connecting hole.

[0010] As a specific implementation, in the above-mentioned oil-separated lubrication structure for a three-stage planetary gearbox, a third slot is provided on the inner wall of the box body, one end of the second wear-resistant ring is embedded in the third slot, and the other end abuts against the outer periphery of the second planetary carrier.

[0011] Furthermore, in the above-mentioned oil separation lubrication structure for a three-stage planetary gearbox, a second through hole connected to the main oil circuit is opened in the second wear-resistant ring, and the second through hole is connected to the first connecting hole.

[0012] As a specific implementation, in the above-mentioned oil-separated lubrication structure for a three-stage planetary gearbox, a fourth slot is provided at one end of the third planetary carrier close to the first planetary carrier, one end of the connecting plate is embedded in the fourth slot, and the other end abuts against the third wear-resistant ring.

[0013] Furthermore, in the above-mentioned oil-separated lubrication structure for a three-stage planetary gearbox, a third through hole connected to the second oil circuit is opened in the third wear-resistant ring, a second connecting hole connected to the third oil circuit is opened in the connecting plate, and the third through hole is connected to the second connecting hole.

[0014] On the other hand, the present invention further provides a three-stage planetary gearbox, which includes the above-mentioned oil separation lubrication structure.

[0015] The three-stage planetary gearbox and its oil separation lubrication structure of the present invention have the following advantages and positive effects:

[0016] (1) The present invention designs an integrated lubrication structure. After the lubricating oil is injected into the main oil circuit, the lubricating oil can be divided into the first oil circuit and the third oil circuit through the second oil circuit, and then flow to the first planetary gear shaft, the second planetary gear shaft, and the third planetary gear shaft, thereby achieving the purpose of lubrication of each level of planets. At the same time, it avoids the need for complex external oil circuit design, greatly reducing the risk of oil leakage in the gear box;

[0017] (2) The present invention provides corresponding wear-resistant rings between each stage of the planetary carrier, and sets a dynamic sealing structure between the wear-resistant ring and the planetary carrier, thereby improving the overall service life of the device without affecting the rotation between the various stages of the planetary carrier, ensuring the stable operation of the gear box, and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of the oil separation lubrication structure for a three-stage planetary gearbox of the present invention;

[0020] Figure 2 yes Figure 1 A partial enlarged view of middle Ⅰ;

[0021] Figure 3 yes Figure 1 A partial enlarged view of middle Ⅱ;

[0022] Figure 4 yes Figure 1 A partial enlarged view of Figure III.

[0023] Description of reference numerals:

[0024] 1-first planetary carrier, 11-first oil circuit, 2-second planetary carrier, 21-second oil circuit, 3-third planetary carrier, 31-third oil circuit, 4-housing, 41-main oil circuit, 5-ring sleeve, 51-first connecting hole, 6-connecting plate, 61-second connecting hole, 7-first wear-resistant ring, 71-first through hole, 8-second wear-resistant ring, 81-second through hole, 9-third wear-resistant ring, 91-third through hole, 100-first planetary gear shaft, 200-second planetary gear shaft, 300-third planetary gear shaft. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] like Figures 1 to 4 As shown, the present invention provides a three-stage planetary gearbox and its oil separation lubrication structure.

[0027] On the one hand, the present invention discloses an oil-separated lubrication structure for a three-stage planetary gearbox, the three-stage planetary gearbox comprising a first planetary carrier 1, a second planetary carrier 2 arranged at one end of the first planetary carrier 1, and a third planetary carrier 3 arranged at one end of the second planetary carrier 2 away from the first planetary carrier 1, the first planetary carrier 1 is provided with a first planetary gear shaft 100, the second planetary carrier 2 is provided with a second planetary gear shaft 200, the third planetary carrier is provided with a third planetary gear shaft 300, a box body 4 is provided on the outside of the first planetary gear shaft, the oil-separated lubrication structure comprises a main oil passage 41 opened in the box body 4, a first wear-resistant ring 7 arranged between the first planetary carrier 1 and the second planetary carrier 2, a second wear-resistant ring 8 arranged between the box body 4 and the second planetary carrier 2, and a third wear-resistant ring 9 arranged between the second planetary carrier 2 and the third planetary carrier 3, wherein the first The planet carrier 1 is provided with a first oil circuit 11 connected to the first planetary gear shaft 100, the first wear-resistant ring 7 is embedded in the end face of the first planet carrier 1, and a ring sleeve 5 is provided between the first wear-resistant ring 7 and the second planet carrier 2. The second planet carrier 2 is provided with a second oil circuit 21 connected to the second planetary gear shaft 200, and the second wear-resistant ring 8 is embedded in the inner wall of the box body 4. The third planet carrier 3 is provided with a third oil circuit 31 connected to the third planetary gear shaft 300, and the third wear-resistant ring 9 is arranged on the inner wall of the second planet carrier 2. A connecting plate 6 is provided between the third wear-resistant ring 9 and the third planet carrier 3; the first oil circuit 11 is connected to the second oil circuit 21 through the first wear-resistant ring 7 and the ring sleeve 5, the second oil circuit 21 is connected to the main oil circuit 41 through the second wear-resistant ring 8, and the second oil circuit 21 is connected to the third oil circuit 31 through the third wear-resistant ring 9 and the connecting plate 6.

[0028] As a specific embodiment, in the oil-separated lubrication structure for a three-stage planetary gearbox of the present invention, a first groove (not shown in the figure) is provided on the end face of the first planetary carrier 1 close to the second planetary carrier 2, one end of the first wear-resistant ring 7 is embedded in the first groove, and the other end is embedded in the ring sleeve 5, and a second groove (not shown in the figure) is provided on the end of the second planetary carrier 2 close to the first planetary carrier 1, and the ring sleeve 5 is embedded in the second groove, and the mating surface between the first wear-resistant ring 7 and the first planetary carrier 1 is a dynamic sealing structure.

[0029] Furthermore, in the oil-separated lubrication structure for a three-stage planetary gearbox of the present invention, a first through hole 71 connected to the first oil circuit 11 is opened in the first wear-resistant ring 7, a first connecting hole 51 connected to the second oil circuit 21 is opened in the ring sleeve 5, and the first through hole 71 is connected to the first connecting hole 51.

[0030] As a specific embodiment, in the oil-separated lubrication structure for a three-stage planetary gearbox of the present invention, a third groove (not shown in the figure) is opened on the inner wall of the box body 4, one end of the second wear-resistant ring 8 is fixedly embedded in the third groove, and the other end is against the outer periphery of the second planetary carrier 2, and the mating surface between the second wear-resistant ring 8 and the second planetary carrier 2 is a dynamic sealing structure.

[0031] Furthermore, in the oil separation lubrication structure for a three-stage planetary gearbox of the present invention, a second through hole 81 connected to the main oil path 41 is formed in the second wear-resistant ring 8 , and the second through hole 81 is connected to the first connecting hole 51 .

[0032] As a specific embodiment, in the oil-divided lubrication structure for a three-stage planetary gearbox of the present invention, a fourth groove (not shown in the figure) is opened at one end of the third planetary carrier 3 close to the first planetary carrier 1, one end of the connecting plate 6 is embedded in the fourth groove, and the other end abuts against the third wear-resistant ring 9, and the mating surface between the third wear-resistant ring 9 and the second planetary carrier 2 is a dynamic sealing structure.

[0033] Furthermore, in the oil-dividing lubrication structure for a three-stage planetary gearbox of the present invention, a third through hole 91 connected to the second oil circuit 21 is opened in the third wear-resistant ring 9, a second connecting hole 61 connected to the third oil circuit 31 is opened in the connecting plate 6, and the third through hole 91 is connected to the second connecting hole 61.

[0034] On the other hand, the present invention further provides a three-stage planetary gearbox, which includes the above-mentioned oil separation lubrication structure.

[0035] The working principle of the oil separation lubrication structure for a three-stage planetary gearbox of the present invention is:

[0036] After the lubricating oil is injected into the main oil circuit 41, the lubricating oil flows from the main oil circuit 41 through the second wear-resistant ring 8 and then flows into the second oil circuit 21, and oil separation is realized from the second oil circuit 21, wherein a part of the lubricating oil flows from the second oil circuit 21 through the ring sleeve 5 and the first wear-resistant ring 7, flows into the first oil circuit 11, and finally flows to the first planetary gear shaft 100, thereby lubricating the first planetary gear shaft 100, another part of the lubricating oil flows directly from the second oil circuit 21 to the second planetary gear shaft 200, thereby lubricating the second planetary gear shaft 200, and another part of the lubricating oil flows from the second oil circuit 21 through the third wear-resistant ring 9 and the connecting plate 6, then flows into the third oil circuit 31, and finally flows to the third planetary gear shaft 300.

[0037] In summary, compared with the prior art, the three-stage planetary gearbox and its oil separation lubrication structure of the present invention have the following advantages and positive effects:

[0038] (1) The present invention designs an integrated lubrication structure. After the lubricating oil is injected into the main oil circuit 41, the lubricating oil can be divided into the first oil circuit 11 and the third oil circuit 31 through the second oil circuit 21, and then flow to the first planetary gear shaft 100, the second planetary gear shaft 200, and the third planetary gear shaft 300, thereby achieving the purpose of lubrication of each level of planets. At the same time, it avoids the need for complex external oil circuit design, greatly reducing the risk of oil leakage in the gearbox;

[0039] (2) The present invention provides corresponding wear-resistant rings between each stage of the planetary carrier, and sets a dynamic sealing structure between the wear-resistant ring and the planetary carrier, thereby improving the overall service life of the device without affecting the rotation between the various stages of the planetary carrier, ensuring the stable operation of the gear box, and having good practicality.

[0040] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, 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 a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil separation lubrication structure for a three-stage planetary gearbox, the three-stage planetary gearbox comprising a first planet carrier, a second planet carrier arranged at one end of the first planet carrier, and a third planet carrier arranged at one end of the second planet carrier away from the first planet carrier, the first planet carrier is provided with a first planetary gear shaft, the second planet carrier is provided with a second planetary gear shaft, the third planet carrier is provided with a third planetary gear shaft, and a box is provided outside the first planetary gear shaft, characterized in that: The oil separation lubrication structure includes a main oil circuit opened in the housing, a first wear-resistant ring arranged between the first planet carrier and the second planet carrier, a second wear-resistant ring arranged between the housing and the second planet carrier, and a third wear-resistant ring arranged between the second planet carrier and the third planet carrier, wherein: The first planet carrier is provided with a first oil passage connected to the first planetary gear shaft, the first wear-resistant ring is embedded in the end surface of the first planet carrier, a ring sleeve is provided between the first wear-resistant ring and the second planet carrier, the second planet carrier is provided with a second oil passage connected to the second planetary gear shaft, the second wear-resistant ring is embedded in the inner wall of the box body, the third planet carrier is provided with a third oil passage connected to the third planetary gear shaft, the third wear-resistant ring is provided on the inner wall of the second planet carrier, and a connecting plate is provided between the third wear-resistant ring and the third planet carrier; The first oil circuit is connected to the second oil circuit through the first wear-resistant ring and the ring sleeve, the second oil circuit is connected to the main oil circuit through the second wear-resistant ring, and the second oil circuit is connected to the third oil circuit through the third wear-resistant ring and the connecting plate.

2. The oil separation lubrication structure for a three-stage planetary gearbox according to claim 1, characterized in that: A first groove is formed on an end surface of the first planet carrier close to one end of the second planet carrier, one end of the first wear-resistant ring is embedded in the first groove, and the other end is embedded in the ring sleeve, a second groove is formed on an end of the second planet carrier close to the first planet carrier, and the ring sleeve is embedded in the second groove.

3. The oil separation lubrication structure for a three-stage planetary gearbox according to claim 2, characterized in that: A first through hole connected to the first oil circuit is formed in the first wear-resistant ring, a first connecting hole connected to the second oil circuit is formed in the ring sleeve, and the first through hole is connected to the first connecting hole.

4. The oil separation lubrication structure for a three-stage planetary gearbox according to claim 1, characterized in that: A third slot is formed on the inner wall of the housing, one end of the second wear-resistant ring is embedded in the third slot, and the other end of the second wear-resistant ring abuts against the outer periphery of the second planet carrier.

5. The oil separation lubrication structure for a three-stage planetary gearbox according to claim 4, characterized in that: A second through hole connected to the main oil circuit is formed in the second wear-resistant ring, and the second through hole is connected to the first connecting hole.

6. The oil separation lubrication structure for a three-stage planetary gearbox according to claim 1, characterized in that: The third planet carrier is provided with a fourth slot at one end close to the first planet carrier, one end of the connecting plate is embedded in the fourth slot, and the other end abuts against the third wear-resistant ring.

7. The oil separation lubrication structure for a three-stage planetary gearbox according to claim 6, characterized in that: A third through hole connected to the second oil circuit is formed in the third wear-resistant ring, a second connecting hole connected to the third oil circuit is formed in the connecting plate, and the third through hole is connected to the second connecting hole.

8. A three-stage planetary gearbox, characterized in that: The three-stage planetary gearbox includes the oil separation lubrication structure according to any one of claims 1-7.

Images