Auxiliary lubrication mechanism for wind turbine speed increaser bearings

Abstract

The present invention discloses an auxiliary lubrication mechanism for a wind power speed increaser bearing, comprising a housing, a planetary gear train, parallel-stage gears, and an oil pool box provided with lubricating oil channels, wherein: a) one side of the planetary carrier is a plane spoke plate, and an oil scraping device comprising an oil scraping plate and an oil guide groove is provided on the side wall of the plane spoke plate, the oil guide groove is located below the oil scraping plate, and the lubricating oil collected by the oil scraping plate is collected in the oil guide groove, and the oil guide groove is fixedly mounted on the housing by bolts through a bracket below; b) at least three lubricating oil channels are provided in the housing, one is a lubricating oil channel for introducing the lubricating oil into the motor side bearing of the planetary carrier, one is a lubricating oil channel for introducing the lubricating oil into the blade side bearing of the spline shaft, and one is a lubricating oil channel containing branches and respectively introduced into the intermediate blade side bearing and the high-speed bearing by the branches; c) an oil collecting groove is provided on the bearing seat wall of the high-speed motor side bearing, and the oil collecting liquid level of the oil collecting groove can at least immerse the moving joint located at the lower part of the high-speed motor side bearing.

Description

Technical Field

[0001] The invention relates to a bearing lubrication mechanism, in particular to an auxiliary lubrication mechanism suitable for planetary, low-speed, medium-speed and high-speed bearings in a wind power gearbox, and belongs to the field of machinery. Background Art

[0002] Bearings are important supporting parts for rotating bodies. In order to reduce internal friction and wear of bearings, discharge friction heat, prevent bearing overheating, prevent bearing rust and corrosion, and extend their service life, bearings must be lubricated reasonably. Traditional bearing lubrication is basically based on forced lubrication, that is, an external lubrication system is used to lubricate bearings and gears through relevant oil holes and oil pipe designs. In order to improve the lubrication capacity of bearings, especially when forced lubrication has not yet worked, bearings can also be lubricated. Therefore, the bearing lubrication structure of the present invention, when in the no-load condition when forced lubrication has not yet worked, guides the lubricating oil on the end face of the planetary carrier through the oil channel in the housing to the bearing through the scraper plate, as an important non-forced lubrication means; when forced lubrication works, it can also be used as an auxiliary lubrication means to improve the lubrication capacity of the bearing and extend its service life. Summary of the invention

[0003] The purpose of the present invention is to provide an auxiliary lubrication mechanism for non-forced lubrication of bearings by using an oil scraper and an oil channel in a box to solve the problem that bearings are difficult to be effectively lubricated under no-load conditions where forced lubrication has not yet started.

[0004] The object of the present invention is achieved as follows: an auxiliary lubrication mechanism for a wind power speed increaser bearing, comprising a housing, a planetary gear train and a parallel-stage gear, wherein the planetary gear train and the parallel-stage gear are supported in the housing through bearings, the lower part of the planetary carrier of the planetary gear train intrudes into an oil pool box, and a lubricating oil channel is provided in the housing, characterized in that:

[0005] a) One side of the planet carrier is a flat radial plate, and an oil scraper device is provided on the side wall of the flat radial plate. The oil scraper device includes an oil scraper plate and an oil guide groove. The oil guide groove is located below the oil scraper plate. The lubricating oil collected by the oil scraper plate is collected in the oil guide groove. The oil guide groove is fixed to the box body by bolts through the bracket below;

[0006] b) At least three lubricating oil passages are provided in the housing, one of which is a lubricating oil passage 7 for introducing the lubricating oil into the planetary carrier motor side bearing 10, one is a lubricating oil passage 8 for introducing the lubricating oil into the spline shaft blade side bearing 12, and another is a lubricating oil passage 9 having branches and respectively introducing the lubricating oil into the intermediate blade side bearing 19 and the high-speed bearing. The oil guide groove of the oil scraper device is connected to each lubricating oil passage in the housing;

[0007] c) An oil collecting groove is provided on the bearing seat wall of the high-speed motor side bearing, and the oil collecting liquid level of the oil collecting groove can at least immerse the moving joint located at the lower part of the high-speed motor side bearing.

[0008] In the present invention: the lubricating oil passage is a drainage groove, or an oil guide hole, or a combination thereof.

[0009] In the present invention: the lubricating oil passage introduced into the planetary carrier motor side bearing is a drainage groove structure; the lubricating oil passage introduced into the spline shaft blade side bearing is a combination structure in which the drainage groove and the oil guide hole are connected in series in sequence; the lubricating oil passage introduced into the intermediate-stage blade side bearing and the high-speed blade side bearing is a drainage groove and the oil guide hole are connected in series in sequence, and then divided into two, one branch is introduced into the guide hole of the oil injection ring, and then introduced into the intermediate-stage blade side bearing, and the other branch is introduced into the high-speed bearing through the guide hole and the drainage groove.

[0010] In the present invention, the other branch introduced into the high-speed bearing through the guide hole and the drainage groove means that the branch is further divided into two, one route is introduced into the high-speed blade side bearing for lubrication through the guide hole, and the other route is first introduced into the transition oil channel through the guide hole, and then introduced into the high-speed motor side oil collecting tank through the transition oil channel through the drainage groove, and then immersed in the moving joint surface of the lower part of the high-speed motor side bearing from the oil collecting tank.

[0011] In the present invention, the scraper plate in the scraper device is located at the upper high point of the side wall of the planet carrier plane spoke plate, and the lubricating oil collected by the scraper plate is evenly distributed to each oil guide groove.

[0012] In the present invention, the oil scraper plate in the oil scraper device is made of elastic plastic or engineering plastic, and the oil collecting tank is integrally cast with the box body, or is processed from a steel plate and then installed on the box body by bolts.

[0013] In the present invention, the oil scraper plate in the oil scraper device is made of elastic plastic or engineering plastic.

[0014] The advantage of the present invention is that the box body is provided with a plurality of oil passages, each of which corresponds to a bearing seat, and the lubricating oil scraped off by the oil scraper flows to the corresponding bearing through the oil passages, which can provide auxiliary lubrication for the bearing. In particular, when the forced lubrication does not work, the auxiliary lubrication will play an important role.

[0015] The advantage of the present invention is that an oil collecting tank is provided on the high-speed motor side of the box body, and the lubricating oil scraped off by the oil scraper flows into the oil collecting tank through the lubricating oil channel, and then penetrates into the bearing on the high-speed motor side, thereby achieving bearing lubrication.

[0016] The invention has the advantages that the lubricating oil collected by an oil scraper provides auxiliary lubrication to five bearings through the lubricating oil channel at the same time, has a compact structure, is easy to maintain, and has high auxiliary lubrication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the position of the scraper plate of the oil scraper device on the plane spoke plate of the planetary carrier.

[0018] Figure 2 It is a schematic diagram of the oil scraper device on the planetary gear motor side housing and the lubricating oil channel introduced into the planetary carrier bearing.

[0019] Figure 3 yes Figure 2 A partial enlarged view of area I in the middle.

[0020] Figure 4 This is a schematic diagram of the lubrication oil passage for lubrication of the blade side bearing of the spline shaft.

[0021] Figure 5 It is a schematic diagram of the front section of the lubricating oil passage leading to the intermediate-stage blade side bearing and the high-speed-stage bearing.

[0022] Figure 6 It is a schematic diagram of the middle section of the lubricating oil passage leading to the intermediate-stage blade side bearing and the high-speed-stage bearing.

[0023] Figure 7 yes Figure 6 Schematic diagram of the lubrication oil channel for the end-introduction high-speed stage blade side bearing.

[0024] Figure 8 yes Figure 6 Schematic diagram of the lubrication oil channel for the end-introduction high-speed motor side bearing.

[0025] Fig. 9 This is a schematic diagram of the end face of the high-speed motor side bearing.

[0026] In the figure: 1, planetary carrier, 2, oil scraper, 3, bracket, 4, housing, 5, guide groove, 6, guide groove, 7, lubricating oil channel, 8, lubricating oil channel, 9, lubricating oil channel, 10, planetary carrier motor side bearing, 11, distance ring, 12, spline shaft blade side bearing, 13, transition oil channel, 14, guide hole, 15, guide hole, 16, screw plug, 17, guide hole, 18, oil injection ring, 19, intermediate stage blade side bearing, 20, guide hole, 21, guide hole, 20, guide hole, 22, guide hole, 23, guide hole, 24, high-speed stage blade side bearing, 25, transition oil channel, 26, guide groove, 27, oil collecting tank, 28, high-speed stage motor side bearing. DETAILED DESCRIPTION

[0027] The accompanying drawings disclose specific embodiments of the present invention in a non-limiting manner. The present invention will be further described below in conjunction with the accompanying drawings.

[0028] The present invention comprises a planetary gear train and parallel-stage gears, which are supported in a housing through bearings. The lower part of a planetary carrier 1 of the planetary gear train intrudes into an oil pool box, and a lubricating oil channel is arranged in the housing 4.

[0029] Depend on Figure 1 , Figure 2 and Figure 3 It can be seen that one side of the planet carrier 1 is a flat spoke plate, and an oil scraping device is provided on the side wall of the flat spoke plate.

[0030] At least three lubricating oil passages 7, 8 and 9 are provided in the housing 4, wherein the lubricating oil passage 7 is a drainage groove structure, and the lubricating oil passage 7 directly introduces the lubricating oil into the planetary carrier motor side bearing 10, and the starting section of the lubricating oil passage 8 that introduces the lubricating oil into the spline shaft blade side bearing 12 is a drainage groove structure, and the starting section of the lubricating oil passage 9 that has branches and is respectively introduced into the intermediate-stage blade side bearing 19 and the high-speed-stage bearing is also a drainage groove structure.

[0031] The oil scraper device includes an oil scraper plate 2 and an oil guide groove. The oil guide groove is located below the oil scraper plate. The lubricating oil collected by the oil scraper plate is evenly collected in the oil guide grooves 5 and 6. The oil guide groove of the oil scraper device is connected to the lubricating oil channels described in the box.

[0032] In this embodiment, the scraper plate 2 in the scraper device is located at the upper high point of the plane spoke plate side wall of the planet carrier 1, and the lubricating oil collected by the scraper plate 2 is evenly distributed to each oil guide groove 5 and 6. In specific implementation, the oil guide grooves 5 and 6 are fixedly mounted on the box body 4 through the bracket 3 below by bolts.

[0033] Depend on Figure 4 It can be seen that in this embodiment, the lubricating oil channel 8 guides the lubricating oil into the distance ring 11 through the front drainage groove and the rear guide hole, and then guides the lubricating oil into the spline shaft blade side bearing 12 through the guide groove of the distance ring 11 to achieve lubrication of the bearing.

[0034] Depend on Figure 5 It can be seen that the front section of the lubricating oil passage 9 for introducing the intermediate blade side bearing and the high-speed bearing is a drainage groove, which first introduces the lubricating oil into the transition oil passage 13 , and the transition oil passage 13 and the guide hole 14 are connected to the guide hole 14 and the guide hole 15 .

[0035] Depend on Figure 6 It can be seen that the oil flows from the guide hole 14 into the guide hole 15, and there is a branch guide hole 17 on the guide hole 15. The branch guide hole 17 provides lubrication for the intermediate blade side bearing 19, and the other branch continues to pass through the oil guide holes 20, 21, and 22 to provide lubrication for the high-speed bearing. In specific implementation, the end of the guide hole 17 can provide lubrication for the intermediate blade side bearing 19 through the oil injection ring 18.

[0036] Depend on Figure 7 It can be seen that while the lubricating oil enters the oil guide hole 20 and is transferred to the high-speed motor side bearing through the oil guide holes 21 and 22, a branch in the oil guide hole 20 is introduced into the high-speed blade side bearing 24 through the guide hole 23 to achieve lubrication of the bearing.

[0037] Depend on Figure 8 and Fig. 9It can be seen that the lubricating oil in the oil guide hole 20 first flows into the transition oil channel 25 through the oil guide holes 21 and 22, and then enters the drainage groove 26 from the transition oil channel 25. Under the action of gravity, the lubricating oil drips from the drainage groove 26 into the oil collecting groove 27, and finally penetrates into the moving joint surface at the bottom of the high-speed motor side bearing 28 from the oil collecting groove to achieve lubrication of the bearing.

[0038] In specific implementation, the end processing openings of each guide hole that appear during processing should be blocked with bolts 16 to prevent the leakage of lubricating oil.

Claims

1. An auxiliary lubrication mechanism for a wind turbine speed increaser bearing, comprising a housing, a planetary gear train and parallel-stage gears, wherein the planetary gear train and the parallel-stage gears are supported in the housing through bearings, the lower part of the planetary carrier of the planetary gear train intrudes into an oil pool box, and a lubricating oil channel is provided in the housing, characterized in that: a) One side of the planet carrier is a flat radial plate, and an oil scraper device is provided on the side wall of the flat radial plate. The oil scraper device includes an oil scraper plate and an oil guide groove. The oil guide groove is located below the oil scraper plate. The lubricating oil collected by the oil scraper plate is collected in the oil guide groove. The oil guide groove is fixed to the box body by bolts through the bracket below; b) At least three lubricating oil passages are provided in the housing, one of which is a lubricating oil passage for introducing the lubricating oil into the motor side bearing of the planetary carrier, one is a lubricating oil passage for introducing the lubricating oil into the blade side bearing of the spline shaft, and another is a lubricating oil passage having branches and respectively introducing the lubricating oil into the intermediate blade side bearing and the high-speed bearing through the branches, and the oil guide groove of the oil scraper device is connected with each lubricating oil passage in the housing; the lubricating oil passage is a drainage groove, or an oil guide hole, or a combination thereof; The lubricating oil passage introduced into the motor side bearing of the planetary carrier is a drainage groove structure; the lubricating oil passage introduced into the blade side bearing of the spline shaft is a combination structure of drainage grooves and oil guide holes connected in sequence; the lubricating oil passage introduces the lubricating oil into the distance ring through the front drainage groove and the rear guide hole, and then introduces the lubricating oil into the spline shaft blade side bearing through the guide groove of the distance ring; the lubricating oil passage introduced into the intermediate blade side bearing and the high-speed blade side bearing is a drainage groove and an oil guide hole connected in sequence, and then divided into two, one branch is introduced into the guide hole of the injection ring, and then introduced into the intermediate blade side bearing, and the other branch is introduced into the high-speed bearing through the guide hole and the drainage groove; the other branch is introduced into the high-speed bearing through the guide hole and the drainage groove means: the branch is further divided into two, one route is introduced into the high-speed blade side bearing for lubrication through the guide hole, and the other route is first introduced into the transition oil passage through the guide hole, and then introduced into the high-speed motor side oil collecting tank through the transition oil passage through the drainage groove, and then immersed in the moving joint surface of the lower part of the high-speed motor side bearing by the oil collecting tank; c) An oil collecting groove is provided on the bearing seat wall of the high-speed motor side bearing, and the oil collecting liquid level of the oil collecting groove can at least immerse the moving joint located at the lower part of the high-speed motor side bearing.

2. The auxiliary lubrication mechanism for the wind turbine speed increaser bearing according to claim 1 is characterized in that: The scraper plate in the scraper device is located at the upper high point of the side wall of the planet carrier plane spoke plate, and the lubricating oil collected by the scraper plate is evenly distributed to each oil guide groove.

3. The auxiliary lubrication mechanism for the wind turbine speed increaser bearing according to claim 2 is characterized in that: The oil scraper plate in the oil scraper device is made of elastic plastic or engineering plastic, and the oil collecting tank is integrally cast with the box body, or is processed from a steel plate and then installed on the box body by bolts.

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