Three-stage planetary gearbox and its oil distribution lubrication structure

Abstract

The application discloses a three-stage planetary gear box and an oil distribution lubricating structure thereof, the three-stage planetary gear box comprising a first planetary carrier, a second planetary carrier and a third planetary carrier, the oil distribution lubricating structure comprising a main oil path arranged on a box body, a first wear-resistant ring arranged between the first planetary carrier and the second planetary carrier, a second wear-resistant ring arranged between the box body and the second planetary carrier, a third wear-resistant ring arranged between the second planetary carrier and the third planetary carrier, a first oil path arranged on the first planetary carrier, a ring sleeve arranged between the first wear-resistant ring and the second planetary carrier, a second oil path arranged on the second planetary carrier, a third oil path arranged on the third planetary carrier and a connecting plate arranged between the third wear-resistant ring and the third planetary carrier; the integrated lubricating structure can realize the lubrication of all stages of planets after lubricating oil is injected into the main oil path, meanwhile, the complicated oil path design outside is avoided, the risk of oil leakage of the gear box is greatly reduced, and the application has good practicability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gear box lubrication, and particularly relates to a three-stage planetary gear box and an oil distribution lubrication structure thereof. BACKGROUND

[0002] Gear boxes are widely used, for example, in wind turbine generators. The gear box is an important mechanical component widely used in wind turbine generators, and its main function is to transmit the power generated by the wind wheel under the action of the wind to the generator and make it have a corresponding rotating speed. Usually, the rotating speed of the wind wheel is very low and far from the required rotating speed for power generation, so the gear box must be used to achieve the speed-up effect of the gear pair, so the gear box is also called a speed-up box.

[0003] Common gear box lubrication methods include gear oil lubrication, semi-fluid lubrication, grease lubrication, and solid lubricant lubrication. The lubrication system of the gear box is of great significance to the normal operation of the gear box. Large wind power gear boxes must be equipped with reliable forced lubrication systems to spray oil for lubrication in the gear meshing area and the planetary wheel shaft. In the prior art, the gear boxes of the three-stage planetary gear box in the industry all adopt an independent lubrication structure form. This traditional structure design has multiple independent oil inlets for lubricating the corresponding lubrication points of each planetary gear box. This structure has multiple oil lines outside, which has a potential risk of oil leakage. In summary, there is an urgent need for a three-stage planetary gear box and an oil distribution lubrication structure thereof. SUMMARY

[0004] To solve the above-mentioned technical problems in the prior art, the present application provides a three-stage planetary gear box and an oil distribution lubrication structure thereof.

[0005] In one aspect, the present application provides an oil distribution lubrication structure for a three-stage planetary gear box, the three-stage planetary gear box 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 an end of the second planet carrier away from the first planet carrier. The first planet carrier is provided with a first planet wheel shaft, the second planet carrier is provided with a second planet wheel shaft, and the third planet carrier is provided with a third planet wheel shaft. The first planet wheel shaft is provided with a box body outside. The oil distribution lubrication structure comprises a main oil line arranged 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.

[0006] The first oil passage is communicated with the first oil passage at the first planet wheel shaft, the first wear-resistant ring is embedded in the end face of the first planet carrier, the ring sleeve is arranged between the first wear-resistant ring and the second planet carrier, the second oil passage is arranged on the second planet carrier and communicated with the second planet wheel shaft, the second wear-resistant ring is embedded in the inner wall of the box, the third oil passage is arranged on the third planet carrier and communicated with the third planet wheel shaft, and the third wear-resistant ring is arranged on the inner wall of the second planet carrier and communicated with the third planet carrier through the connecting plate.

[0007] The first oil passage is communicated with the second oil passage through the first wear-resistant ring and the ring sleeve, the second oil passage is communicated with the main oil passage through the second wear-resistant ring, and the second oil passage is communicated with the third oil passage through the third wear-resistant ring and the connecting plate.

[0008] As a specific embodiment, in the oil distribution lubrication structure for the three-stage planetary gear box, a first clamping groove is arranged on the end face of the first planet carrier close to the second planet carrier, one end of the first wear-resistant ring is embedded in the first clamping groove, and the other end is embedded in the ring sleeve, a second clamping groove is arranged on the end of the second planet carrier close to the first planet carrier, and the ring sleeve is embedded in the second clamping groove.

[0009] Further, in the oil distribution lubrication structure for the three-stage planetary gear box, a first through hole is arranged in the first wear-resistant ring and communicated with the first oil passage, a first connecting hole is arranged in the ring sleeve and communicated with the second oil passage, and the first through hole is communicated with the first connecting hole.

[0010] As a specific embodiment, in the oil distribution lubrication structure for the three-stage planetary gear box, a third clamping groove is arranged on the inner wall of the box, one end of the second wear-resistant ring is embedded in the third clamping groove, and the other end abuts against the outer periphery of the second planet carrier.

[0011] Further, in the oil distribution lubrication structure for the three-stage planetary gear box, a second through hole is arranged in the second wear-resistant ring and communicated with the main oil passage, and the second through hole is communicated with the first connecting hole.

[0012] As a specific embodiment, in the oil distribution lubrication structure for the three-stage planetary gear box, a fourth clamping groove is arranged on the end of the third planet carrier close to the first planet carrier, one end of the connecting plate is embedded in the fourth clamping groove, and the other end abuts against the third wear-resistant ring.

[0013] Further, in the oil distribution lubrication structure for the three-stage planetary gearbox, a third through hole communicated with the second oil path is arranged in the third wear-resistant ring, and a second connecting hole communicated with the third oil path is arranged in the connecting plate, and the third through hole is communicated with the second connecting hole.

[0014] In another aspect, the application also provides a three-stage planetary gearbox comprising the above-mentioned oil distribution lubrication structure.

[0015] The three-stage planetary gearbox and the oil distribution lubrication structure thereof have the following advantages and positive effects:

[0016] (1) The integrated lubrication structure is designed, and after the lubricating oil is injected into the main oil path, the lubricating oil can be distributed to the first oil path and the third oil path through the second oil path, and then flow to the first planetary shaft, the second planetary shaft and the third planetary shaft, so as to realize the lubrication of each stage of planets, and avoid complex oil path design outside, thereby greatly reducing the risk of gear box oil leakage.

[0017] (2) The corresponding wear-resistant ring is arranged between each stage of planet carriers, and the wear-resistant ring and the planet carrier are arranged in a dynamic sealing structure, so that the service life of the whole device is improved without affecting the rotation between each stage of planet carriers, the stable work of the gear box is ensured, and good practicability is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only used to further understand the present application and form a part of the present application. For those skilled in the art, other drawings can also be obtained without creative labor based on these drawings. In the drawings:

[0019] Figure 1 is a structural schematic view of the oil distribution lubrication structure for the three-stage planetary gearbox of the present application;

[0020] Figure 2 is a structural schematic view of the oil distribution lubrication structure for the three-stage planetary gearbox of the present application; Figure 1 is a partial enlarged view of I in FIG. 1;

[0021] Figure 3 is a structural schematic view of the oil distribution lubrication structure for the three-stage planetary gearbox of the present application; Figure 1 is a partial enlarged view of II in FIG. 1;

[0022] Figure 4 is a partial enlarged view of III in FIG. 1. Figure 1

[0023] Explanation of reference signs:

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

[0025] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] As shown in Figures 1 to 4 The present application provides a three-stage planetary gear box and its oil distribution lubrication structure.

[0027] The application discloses a kind of oil distribution lubrication structures for three-stage planetary gearbox, three-stage planetary gearbox includes first planet carrier 1, second planet carrier 2 is arranged at the one end of first planet carrier 1, third planet carrier 3 is arranged at the one end of second planet carrier 2 away from first planet carrier 1, the first planet carrier 1 is provided with first planetary gear shaft 100, the second planet carrier 2 is provided with second planetary gear shaft 200, the third planet carrier is provided with third planetary gear shaft 300, the first planetary gear shaft is provided with box 4 outside, oil distribution lubrication structure includes main oil path 41 being opened in box 4, first wear ring 7 being arranged between first planet carrier 1 and second planet carrier 2, second wear ring 8 being arranged between box 4 and second planet carrier 2, third wear ring 9 being arranged between second planet carrier 2 and third planet carrier 3, wherein, first planet carrier 1 is provided with first oil path 11 being communicated at first planetary gear shaft 100, first wear ring 7 is embedded in the end surface of first planet carrier 1, ring sleeve 5 is arranged between first wear ring 7 and second planet carrier 2, second planet carrier 2 is provided with second oil path 21 being communicated at second planetary gear shaft 200, second wear ring 8 is embedded in the inner wall of box 4, third planet carrier 3 is provided with third oil path 31 being communicated at third planetary gear shaft 300, third wear ring 9 is arranged in the inner wall of second planet carrier 2, connecting plate 6 is arranged between third wear ring 9 and third planet carrier 3;First oil path 11 and second oil path 21 are communicated through first wear ring 7 and ring sleeve 5, second oil path 21 and main oil path 41 are communicated through second wear ring 8, second oil path 21 and third oil path 31 are communicated through third wear ring 9 and connecting plate 6.

[0028] As a specific embodiment, in the oil distribution lubrication structure for three-stage planetary gearbox of the application, first planet carrier 1 is provided with first clamping groove (not shown in the figure) near the end surface of second planet carrier 2, one end of first wear ring 7 is embedded in the first clamping groove, and the other end is embedded in ring sleeve 5, second planet carrier 2 is provided with second clamping groove (not shown in the figure) near the end of first planet carrier 1, and ring sleeve 5 is embedded in the second clamping groove, and the combined surface between first wear ring 7 and first planet carrier 1 is a dynamic sealing structure.

[0029] Further, in the oil distribution lubrication structure for three-stage planetary gearbox of the application, first wear ring 7 is provided with first through hole 71 being communicated with first oil path 11, and ring sleeve 5 is provided with first connecting hole 51 being communicated with second oil path 21, and first through hole 71 is communicated with first connecting hole 51.

[0030] As a specific embodiment, in the oil distribution lubrication structure for three-stage planetary gearbox of the application, third clamping groove (not shown in the figure) is opened in the inner wall of box 4, one end of second wear ring 8 is fixedly embedded in the third clamping groove, and the other end abuts to the outer circumference of second planet carrier 2, and the combined surface between second wear ring 8 and second planet carrier 2 is a dynamic sealing structure.

[0031] Further, in the oil distribution lubrication structure for the three-stage planetary gearbox, a second through hole 81 is formed in the second wear-resistant ring 8 and is communicated with the first connecting hole 51.

[0032] As a specific embodiment, in the oil distribution lubrication structure for the three-stage planetary gearbox, a fourth clamping groove (not shown in the figure) is formed in the third carrier 3 near one end of the first carrier 1, one end of the connecting plate 6 is embedded in the fourth clamping groove, and the other end abuts against the third wear-resistant ring 9. The combined surface between the third wear-resistant ring 9 and the second carrier 2 is a dynamic sealing structure.

[0033] Further, in the oil distribution lubrication structure for the three-stage planetary gearbox, a third through hole 91 is formed in the third wear-resistant ring 9 and is communicated with the second oil path 21, and a second connecting hole 61 is formed in the connecting plate 6 and is communicated with the third oil path 31. The third through hole 91 is communicated with the second connecting hole 61.

[0034] On the other hand, the present application also provides a three-stage planetary gearbox comprising the above-mentioned oil distribution lubrication structure.

[0035] The working principle of the oil distribution lubrication structure for the three-stage planetary gearbox is as follows:

[0036] After the lubricating oil is injected into the main oil path 41, the lubricating oil flows from the main oil path 41 through the second wear-resistant ring 8 and then flows into the second oil path 21, and the oil distribution is realized at the second oil path 21. Part of the lubricating oil flows from the second oil path 21 through the ring sleeve 5 and the first wear-resistant ring 7 and then flows into the first oil path 11, and finally flows to the first planetary shaft 100, realizing the lubrication of the first planetary shaft 100. Another part of the lubricating oil directly flows from the second oil path 21 to the second planetary shaft 200, realizing the lubrication of the second planetary shaft 200. Still another part of the lubricating oil flows from the second oil path 21 through the third wear-resistant ring 9 and the connecting plate 6 and then flows into the third oil path 31, and finally flows to the third planetary shaft 300.

[0037] In summary, compared with the prior art, the three-stage planetary gearbox and the oil distribution lubrication structure thereof have the following advantages and positive effects:

[0038] (1) The present application designs an integrated lubrication structure. After the lubricating oil is injected into the main oil path 41, the lubricating oil can be distributed to the first oil path 11 and the third oil path 31 through the second oil path 21, and then flows to the first planetary shaft 100, the second planetary shaft 200, and the third planetary shaft 300, realizing the lubrication of each stage of the planet. At the same time, the complex oil path design outside is avoided, and the risk of gear box oil leakage is greatly reduced.

[0039] (2)The application realizes the rotation between the planetary gears without affecting the service life of the device as a whole, improves the service life of the device as a whole, ensures the stable work of the gear box, and has good practicability.

[0040] It should be noted that, in this article, unless otherwise specified and limited, the term "connection" or its synonyms should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, and those skilled in the art can understand the specific meaning of the above-mentioned term in the application according to the specific situation. 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 the entities or operations. At the same time, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "up", "down" in this article are referred to the placement state shown in the drawings.

[0041] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

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 disposed at one end of the first planet carrier, and a third planet carrier disposed at an end of the second planet carrier away from the first planet carrier, the first planet carrier being provided with a first planetary gear shaft, the second planet carrier being provided with a second planetary gear shaft, the third planet carrier being provided with a third planetary gear shaft, and a housing being 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, and 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, and the second wear-resistant ring is embedded in the inner wall of the housing. The third planet carrier is provided with a third oil passage connected to the third planetary gear shaft, and the third wear-resistant ring is provided on the inner wall of the second planet carrier. 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 the end surface of the first planet carrier close to 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, and a second groove is formed on the 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 defined in the first wear-resistant ring, a first connecting hole connected to the second oil circuit is defined 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 3, characterized in that: A third slot is formed on the inner wall of the box. 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 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 defined 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 5, 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 defined in the third wear-resistant ring, a second connecting hole connected to the third oil circuit is defined 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 to 7.

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