Wind power gear box and sealing oil mist prevention device thereof

Abstract

The utility model discloses a wind power gear box and a sealing oil mist prevention device thereof. Comprising an output shaft arranged on a wind power gear box, a bearing arranged on the periphery of the output shaft in a sleeving mode, a box body arranged on the periphery of the bearing in a sleeving mode, a transparent cover fixed to one side of the box body, a distance ring arranged between the box body and the output shaft, an oil baffle plate arranged between the distance ring and the transparent cover, and a rear box cover arranged below the box body. The box body is provided with a first oil way communicated with the bearing and a second oil way communicated with the distance ring, an oil storage bin is formed between the box body and the transparent cover, the oil storage bin is communicated with a first oil port, the rear box cover is provided with a second oil port, and an oil return pipe is communicated between the first oil port and the second oil port; according to the device, high-pressure oil gas is effectively prevented from overflowing through the oil return pipe, a cabin and electrical equipment are prevented from being polluted by oil mist, the problem that the oil return hole is blocked due to dislocation of the distance ring in the prior art is solved, stable circulation of a gearbox lubricating system is maintained, and the risks of oil leakage and lubrication failure caused by unsmooth oil return are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to wind power gear box technical field, concretely relates to a wind power gear box and sealed oil mist device thereof. BACKGROUND

[0002] At present, in the operation process of wind power gear box, a large amount of oil mist is often generated due to the high-speed rotation of gear meshing in high-speed stage box, these oil mist and high-pressure oil gas in cavity form a complex environment together, with the continuous work of gear box, the high-pressure oil gas in cavity often overflows outward through the mechanical seal of output shaft, this overflow not only causes the pollution of cabin interior and other electrical equipment, but also may have adverse effects on the overall performance and operation stability of wind power equipment.

[0003] The high-speed stage mechanical seal design in prior art usually includes oil return hole, these oil return holes aim at returning the lubricating oil in gear box cavity to oil tank to reduce the leakage of oil gas, however, the current oil return hole is directly communicated with gear box cavity, at the same time of returning oil, it is also easy to cause the leakage of oil gas, further aggravating the pollution problem of cabin and electrical equipment, in addition, in the output shaft part of wind power gear box, the installation mode of bearing spacer ring is crucial for the stable operation of gear box, however, due to the non-unique existing installation mode, it is easy to cause the misplacement of bearing spacer ring during installation, once the bearing spacer ring is misaligned, it is easy to block the oil return hole, causing poor oil return, and even causing the phenomenon of oil leakage, which not only affects the normal lubrication of gear box, but also may have serious effects on the service life and performance of gear box, in view of the above, a wind power gear box and sealed oil mist device thereof are urgently needed. SUMMARY

[0004] In order to solve the above-mentioned technical problems in prior art, on the one hand, the utility model provides a wind power gear box and sealed oil mist device thereof, which comprises an output shaft arranged on the wind power gear box, a bearing sleeved on the outer periphery of the output shaft, a box body sleeved on the outer periphery of the bearing, a transparent cover fixed on one side of the box body by a fastener, a distance ring arranged between the box body and the output shaft, an oil baffle arranged between the distance ring and the transparent cover, and a rear cover arranged below the box body.

[0005] A first oil channel communicated with the bearing and a second oil channel communicated with the distance ring are formed on the box body, the first oil channel is communicated with the second oil channel, and an oil return hole and a guide groove communicated with the second oil channel are formed on the inner wall of the box body.

[0006] An oil storage tank is formed between the housing and the transparent cover. A first oil port is connected to the bottom of the oil storage tank. A second oil port is opened on the rear cover. An oil return pipe is connected between the first oil port and the second oil port. The height of the first oil port is lower than the operating oil level of the wind turbine gearbox.

[0007] The spacer ring is provided with an oil return groove that matches and communicates with the oil return hole. The spacer ring has a first positioning hole in the radial direction and a second positioning hole in the axial direction. A first positioning pin is provided between the first positioning hole and the guide groove. The oil baffle plate has a third positioning hole that matches the second positioning hole in the side close to the spacer ring. A second positioning pin is provided between the second positioning hole and the third positioning hole.

[0008] Furthermore, in the above-mentioned sealing and anti-oil mist device for wind turbine gearboxes, one end of the spacer ring abuts against the bearing, and the other end abuts against the oil baffle.

[0009] In one specific embodiment, in the above-mentioned sealing and oil mist prevention device for wind turbine gearboxes, the fasteners are fastening bolts.

[0010] In one specific embodiment, in the above-mentioned sealing and oil mist prevention device for wind turbine gearboxes, a gasket is provided between the fastener and the transparent cover.

[0011] On the other hand, this utility model also provides a wind turbine gearbox, which includes the above-mentioned sealing and oil mist prevention device.

[0012] The sealing and oil mist prevention device for wind turbine gearboxes of this utility model has the following advantages and beneficial effects:

[0013] (1) This device sets up an oil storage tank between the housing and the cover, and connects the first oil port and the return oil pipe at the bottom of the oil storage tank, which are lower than the operating oil level, to form a double leak-proof structure of "gravity backflow + liquid seal gas blocking". When the gearbox is running, the lubricating oil collected in the oil storage tank can automatically flow back to the rear cover through the return oil pipe under the action of gravity. At the same time, because the first oil port is lower than the oil level, the inlet of the return oil pipe is submerged in oil, forming a natural liquid seal, which effectively prevents high pressure oil and gas from overflowing through the return oil pipe and avoids the engine room and electrical equipment from being contaminated by oil mist.

[0014] (2) In this device, the distance ring is positioned by the first positioning pin and the second positioning pin, which ensures that the oil return groove and the oil return hole of the gearbox are precisely aligned during installation. This completely solves the problem of oil return hole blockage caused by the misalignment of the distance ring in the prior art, maintains the stable circulation of the gearbox lubrication system, avoids the risk of oil leakage and lubrication failure caused by poor oil return, and has good practicality. Attached Figure Description

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described below are only for further understanding of the embodiments of the present application and constitute a part of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor also belong to the protection scope of the present application.

[0016] Fig. 1 is a structural schematic view of the sealing oil mist prevention device for the wind power gear box of the present application;

[0017] Fig. 2 is a structural schematic view of the first positioning hole in the sealing oil mist prevention device for the wind power gear box of the present application;

[0018] Fig. 3 is a structural schematic view of the second positioning hole in the sealing oil mist prevention device for the wind power gear box of the present application;

[0019] Fig. 4 is a structural schematic view of the oil return hole in the sealing oil mist prevention device for the wind power gear box of the present application.

[0020] Explanation of reference signs:

[0021] 1-output shaft, 2-bearing, 3-box body, 31-first oil path, 32-second oil path, 33-guiding groove, 34-oil return hole, 4-fastener, 41-gasket, 5-transparent cover, 51-oil storage bin, 6-distance ring, 61-first positioning hole, 62-second positioning hole, 63-oil return groove, 64-first positioning pin, 65-second positioning pin, 7-oil baffle, 8-rear cover, 9-oil return pipe, 91-first oil port, 92-second oil port. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will combine the embodiments of the present application and the corresponding drawings to clearly and completely describe the technical scheme of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, 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 also belong to the protection scope of the present application.

[0023] As shown in Figs. 1 to 4 The present application discloses a wind power gear box and a sealing oil mist prevention device thereof.

[0024] In one aspect, the sealing oil mist preventing device for the wind power gear box comprises an output shaft 1 arranged on the wind power gear box, a bearing 2 sleeved on the outer periphery of the output shaft 1, a box body 3 sleeved on the outer periphery of the bearing 2, a transparent cover 5 fixed on one side of the box body 3 through a fastener 4, a distance ring 6 arranged between the box body 3 and the output shaft 1, an oil baffle 7 arranged between the distance ring 6 and the transparent cover 5, and a rear cover 8 arranged below the box body 3. The sealing performance of the wind power gear box is ensured by arranging the transparent cover 5. The distance ring 6 is arranged to play a positioning and supporting role. The oil baffle 7 can effectively prevent the oil mist and oil gas from leaking outward. The box body 3 is provided with a first oil path 31 communicated with the bearing 2 and a second oil path 32 communicated with the distance ring 6. The first oil path 31 is communicated with the second oil path 32 to form a circulating channel of lubricating oil. The inner wall of the box body 3 is provided with an oil return hole 34 communicated with the second oil path 32 and a guide groove 33. An oil storage bin 51 is formed between the box body 3 and the transparent cover 5. The bottom of the oil storage bin 51 is communicated with a first oil port 91. The rear cover 8 is provided with a second oil port 92. The first oil port 91 and the second oil port 92 are communicated with an oil return pipe 9 arranged therebetween. The oil storage bin 51 is used for temporarily storing the returned lubricating oil. After the lubricating oil accumulates in the oil storage bin 51, the lubricating oil is returned to the rear cover 8 through the oil return pipe 9 to realize oil circulation. The height of the first oil port 91 is lower than the running oil level of the wind power gear box. Thus, during the operation of the wind power gear box, the lubricating oil collected in the oil storage bin 51 can be returned to the rear cover 8 through the oil return pipe 9 under the action of gravity. Since one end of the oil return pipe 9 is immersed in the oil, the oil return pipe 9 can play a role of sealing oil gas. The distance ring 6 is provided with an oil return groove 63 matched with and communicated with the oil return hole 34. The distance ring 6 is radially provided with a first positioning hole 61 and axially provided with a second positioning hole 62. The first positioning hole 61 and the guide groove 33 are provided with a first positioning pin 64. The side of the oil baffle 7 close to the distance ring 6 is provided with a third positioning hole (not shown in the figure) matched with the second positioning hole 62. The second positioning hole 62 and the third positioning hole are provided with a second positioning pin 65. The position of the distance ring 6 in the radial direction of the box body 3 is fixed through the double radial positioning of the first positioning pin 64 and the second positioning pin 65 to prevent the distance ring 6 from being displaced in the radial direction. When the distance ring 6 is fixed, the oil return groove 63 is opposite to the oil return hole 34. The lubricating oil can flow through the oil return groove 63, the oil return hole 34 and the second oil path 32 in sequence to avoid blockage.

[0025] Further, in the sealing oil mist preventing device for the wind power gear box, one end of the distance ring 6 abuts against the bearing 2, and the other end abuts against the oil baffle 7.

[0026] As a specific embodiment, in the sealing oil mist preventing device for the wind power gear box, the fastener 4 is a fastening bolt. Of course, other fasteners 4 such as fastening screws can also be used as long as the fixing requirement is met.

[0027] As a specific embodiment, in the sealing oil mist prevention device for the wind power gear box, the gasket 41 is arranged between the fastener 4 and the transparent cover 5, the gasket 41 can adopt a metal gasket 41 or a rubber gasket 41, etc., by arranging the gasket 41, not only the stability of the connection between the fastener 4 and the transparent cover 5 is improved, but also the sealing performance of the transparent cover 5 is greatly enhanced.

[0028] On the other hand, the utility model also provides a wind power gear box, the wind power gear box includes above-mentioned sealing oil mist prevention device.

[0029] The working principle of the sealing oil mist prevention device for the wind power gear box is as follows:

[0030] When the wind power gear box is running, the oil mist and high-pressure oil gas generated by the high-speed rotation of the gear flow in the box body 3, the lubricating oil lubricates the bearing 2 and the area near the constant distance ring 6 through the first oil path 31 and the second oil path 32, and then the lubricating oil carrying the oil mist flows back to the oil tank through the oil return groove 63 and the oil return hole 34, since the constant distance ring 6 is accurately installed through the positioning pin, the oil return hole 34 is not blocked, the smoothness of the oil return is ensured, at the same time, the oil storage bin 51 between the box body 3 and the transparent cover 5 collects part of the flowing back lubricating oil, which is transported to the rear cover 8 through the oil return pipe 9, and since the first oil port 91 is lower than the running oil level, not only the lubricating oil in the oil storage bin 51 can flow back smoothly, but also the oil mist can be prevented from entering between the box body 3 and the transparent cover 5 through the oil return pipe 9 to cause leakage, the pollution to the cabin and electrical equipment is reduced, and the running stability and service life of the wind power gear box are improved.

[0031] Compared with the prior art, the sealing oil mist prevention device for the wind power gear box has the following advantages and beneficial effects:

[0032] (1) The device sets the oil storage bin 51 between the box body 3 and the transparent cover 5, and the first oil port 91 and the oil return pipe 9 lower than the running oil level are communicated at the bottom of the oil storage bin 51, forming a double anti-leakage structure of "gravity return + liquid seal gas blocking", when the gear box is running, the lubricating oil collected by the oil storage bin 51 can flow back to the rear cover 8 automatically under the action of gravity through the oil return pipe 9, at the same time, since the first oil port 91 is lower than the oil level, the inlet of the oil return pipe 9 is immersed in the oil, forming a natural liquid seal, effectively preventing the high-pressure oil gas from overflowing through the oil return pipe 9, and avoiding the pollution of the cabin and electrical equipment by the oil mist;

[0033] (2) The constant distance ring 6 in the device is double-positioned through the first positioning pin 64 and the second positioning pin 65, ensuring that the oil return groove 63 and the oil return hole 34 of the box body 3 are accurately aligned when the constant distance ring 6 is installed, completely solving the problem of the blockage of the oil return hole 34 caused by the mispositioning of the constant distance ring 6 in the prior art, maintaining the stable circulation of the lubricating system of the gear box, avoiding the risk of oil leakage and lubrication failure caused by poor oil return, and having good practicability.

[0034] It should be noted that, in this paper, 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 terms in the utility model 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 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 equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. In addition, "front", "back", "left", "right", "up", "down" and the like in this paper are referred to the placement state shown in the drawings.

[0035] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, but not to limit it; although the utility model has been described in detail with reference to the examples, those skilled in the art should understand that: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A sealing and oil mist prevention device for wind turbine gearboxes, characterized in that, The sealing and oil mist prevention device for a wind turbine gearbox includes an output shaft disposed on the wind turbine gearbox, a bearing sleeved on the outer periphery of the output shaft, a housing sleeved on the outer periphery of the bearing, a cover fixed to one side of the housing by fasteners, a spacer ring disposed between the housing and the output shaft, an oil baffle plate disposed between the spacer ring and the cover, and a rear cover disposed below the housing, wherein: The housing is provided with a first oil passage connected to the bearing and a second oil passage connected to the spacer ring. The first oil passage is connected to the second oil passage. The inner wall of the housing is provided with an oil return hole and a guide groove connected to the second oil passage. An oil storage tank is formed between the housing and the transparent cover. A first oil port is connected to the bottom of the oil storage tank. A second oil port is opened on the rear cover. An oil return pipe is connected between the first oil port and the second oil port. The height of the first oil port is lower than the operating oil level of the wind turbine gearbox. The spacer ring is provided with an oil return groove that matches and communicates with the oil return hole. The spacer ring has a first positioning hole in the radial direction and a second positioning hole in the axial direction. A first positioning pin is provided between the first positioning hole and the guide groove. The oil baffle plate has a third positioning hole that matches the second positioning hole in the side close to the spacer ring. A second positioning pin is provided between the second positioning hole and the third positioning hole.

2. The sealing and oil mist prevention device for wind turbine gearboxes according to claim 1, characterized in that, One end of the spacer ring abuts against the bearing, and the other end abuts against the oil baffle.

3. The sealing and oil mist prevention device for wind turbine gearboxes according to claim 1, characterized in that, The fasteners are fastening bolts.

4. The sealing and oil mist prevention device for wind turbine gearboxes according to claim 1, characterized in that, A gasket is provided between the fastener and the transparent cover.

5. A wind turbine gearbox, characterized in that, The wind turbine gearbox includes the sealing and oil mist prevention device as described in any one of claims 1-4.

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