CN216923202U - Labyrinth seal oil return device - Google Patents
Labyrinth seal oil return device Download PDFInfo
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- CN216923202U CN216923202U CN202122992417.9U CN202122992417U CN216923202U CN 216923202 U CN216923202 U CN 216923202U CN 202122992417 U CN202122992417 U CN 202122992417U CN 216923202 U CN216923202 U CN 216923202U
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- oil return
- labyrinth
- oil
- sealing
- inner cavity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a labyrinth seal oil return device which comprises a rotor assembly, a labyrinth seal, an oil return storage assembly and an oil return channel, wherein the rotor assembly is arranged in a gearbox box body in a penetrating mode, the oil return storage assembly is arranged in an inner cavity of the gearbox box body, the oil return channel is arranged on the inner wall of an output side shell wall of the gearbox box body and is positioned on the lower side of a bearing, the input end of the rotor assembly is connected to the side wall of the input side of the gearbox box body, the outer wall of the output end of the rotor assembly is connected to the side wall of the output side of the gearbox box body through the bearing, the labyrinth seal is arranged on the rotor assembly on the output side of the bearing, the labyrinth seal is communicated with the inner wall of the gearbox box body through a labyrinth gap channel and an oil return channel of the labyrinth seal, and the tail end of the oil return storage assembly is arranged in the inner cavity of the gearbox box body in a mode lower than the head end of the oil return storage assembly. The utility model solves the problem of oil leakage caused by labyrinth seal failure due to the fact that the pressure of the internal cavity of the gear box is increased due to oil stirring, temperature rise, gas leakage and the like of the rotor assembly.
Description
Labyrinth seal oil return device
Technical Field
The utility model belongs to the technical field of high-speed rotor sealing, and particularly relates to a labyrinth seal oil return device.
Background
Labyrinth seals are the most commonly used sealing means for high-speed rotating machines, and are provided on the shaft journals of high-speed rotating rotors cooled and lubricated by lubricating oil for the purpose of oil sealing. In the existing common labyrinth seal, an oil return channel is directly communicated with an inner cavity of a machine, so that oil passing through each seal tooth smoothly returns to the inner cavity of the machine through the oil return channel; however, in some high-speed rotating machines, as the lubricating oil in the machine cavity is thrown, squeezed and collided by the high-speed rotating rotor, the lubricating oil is atomized to form oil mist, and along with the increase of the operating temperature of the machine, the volume of the gas with a large amount of oil mist in the cavity is expanded, so that the internal cavity pressure of the inner cavity of the machine is increased; particularly for the compressor machine, the phenomenon that part of pressurized gas leaks from the back of the impeller and the air seal assembly to different degrees and enters the inner cavity of the compressor machine further causes the pressure of the inner cavity to rise, so that the inner cavity of the compressor machine is filled with pressurized oil mist gas, the pressure of the inner cavity of the compressor machine rises, the resistance of lubricating oil returning to the inner part of the cavity through the oil return channel is increased, and the labyrinth seal fails to cause oil leakage. In order to solve the problem of oil leakage caused by the failure of the labyrinth seal due to the increase of the cavity pressure of the machine, the number of seal teeth is generally increased to improve the oil sealing capacity, but the method inevitably causes the size of the labyrinth seal part and the related rotor system part to be increased, which is unacceptable for the machine with strict structural size requirements. Therefore, a sealing structure of a high-speed rotating rotor of a high-speed rotating machine is a technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a labyrinth seal oil return device, which solves the problem of oil leakage caused by labyrinth seal failure due to the fact that the pressure of an inner cavity of a machine gear box is increased due to oil stirring, temperature rise, gas leakage and the like of a rotor assembly rotating at a high speed. In order to achieve the above object, the present invention adopts the following technical effects:
according to one aspect of the utility model, the labyrinth seal oil return device comprises a rotor assembly penetrating through a gearbox body, wherein the input end of the rotor assembly is connected to the input side wall of the gearbox body, the outer wall of the output end of the rotor assembly is connected to the output side wall of the gearbox body through a bearing, the oil return device further comprises a labyrinth seal, an oil return storage assembly arranged in an inner cavity of the gearbox body and an oil return channel arranged on the inner upper side of the output side shell wall of the gearbox body and positioned on the lower side of the bearing, the head end of the oil return storage assembly is fixed in the inner cavity of the gearbox body and communicated with the outlet end of the oil return channel, the labyrinth seal is arranged around the rotor assembly on the output side of the bearing, and the labyrinth seal oil return device passes through a labyrinth gap channel of the labyrinth seal on the output side of the rotor assembly, The oil return channel is communicated with the inner cavity of the gearbox box body, the outlet end of the oil return channel penetrates through the inner side shell wall of the gearbox box body and is communicated with the inner cavity, and the tail end of the oil return storage assembly is arranged in the inner cavity of the gearbox box body and is lower than the head end of the oil return storage assembly.
The further preferred of above-mentioned scheme, the subassembly is stored to the oil return includes that interconnect's the sealed return oil deposits return pipe and the sealed stay tube of return oil, return oil channel's exit end with the head end intercommunication of the sealed stay tube of return oil, the head end of the sealed stay tube of return oil passes through flange fixed connection on the interior cavity inside wall of gear box body, the end of the sealed stay tube of return oil is vertical extends to the interior cavity bottom direction of gear box body, and the sealed return pipe that deposits of return oil that one section or the multistage of the end-to-end connection of the sealed stay tube of return oil is vertical direction and undulates in proper order, and the highest level of the sealed return pipe that deposits of this return oil is less than the head end of the sealed stay tube of return oil.
Preferably, the tail end of the oil return sealing support pipe is connected with a section of U-shaped oil return sealing storage elbow pipe along the vertical direction.
Preferably, the horizontal height of the head end of the oil return sealing support pipe is more than 1.5 times greater than the horizontal height of the tail end of the U-shaped oil return sealing storage elbow pipe.
In a further preferable mode of the above scheme, a first labyrinth passage communicated with the labyrinth clearance passage of the labyrinth seal is arranged at the periphery of the labyrinth seal and inside the output side of the gearbox box body, a second labyrinth passage communicated with the bearing output side is arranged between the first oil passage and the bearing output side, and the labyrinth clearance passage of the labyrinth seal is communicated with the inlet end of the oil return passage sequentially through the first labyrinth passage and the second labyrinth passage.
In a further preferable mode of the above-mentioned solution, an oil passing channel groove is provided on the output side of the bearing and below the second labyrinth channel, an upper end of the oil passing channel groove is communicated with a lower portion of an end portion of the second labyrinth channel on a side far from the first labyrinth channel, and a lower end of the oil passing channel groove is communicated with an inlet end of the oil return channel.
The scheme is further preferred, an O-shaped sealing element is arranged between the flange and the inner cavity inner side wall of the gearbox box body, and the inner cavity inner side wall on one side of the outlet end of the oil return channel is in sealing connection with the head end of the oil return sealing supporting tube through the O-shaped sealing element and the flange.
In summary, the utility model adopts the above technical scheme, and the utility model has the following technical effects:
(1) the labyrinth oil sealing device is simple in structure, and particularly for compressor machines with strict size requirements, the oil sealing capacity of the labyrinth seal can be improved under the condition that the sizes of related parts are not increased, oil return of the labyrinth seal through the oil return channel is enabled to flow more smoothly, and the sealing effect is achieved.
(2) The utility model mainly solves the problems of labyrinth seal failure and oil leakage caused by the increase of the internal cavity pressure of the machine gear box due to oil stirring, temperature rise and the like of a machine rotor assembly rotating at a high speed, the problems of labyrinth seal failure and oil leakage caused by the increase of the cavity pressure of the internal cavity of the gear box due to the leakage of gas into the gear box of a compressor machine and the problem of the increase of the size of related parts caused by the increase of the oil sealing capacity of a labyrinth seal.
Drawings
FIG. 1 is a schematic structural diagram of a labyrinth oil return device of the present invention;
FIG. 2 is a schematic structural view of another embodiment of the return oil storage assembly of the present invention;
in the drawing, a rotor assembly 1, a bearing 2, a labyrinth air seal 3, a gearbox box body 4, an oil return storage assembly 5, an inner cavity 6, a labyrinth clearance channel 31, a first labyrinth channel 32, a second labyrinth channel 33, an oil channel groove 34, an oil return channel 41, an oil return sealing storage elbow 50, an oil return sealing support pipe 51 and a flange 56.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
Referring to fig. 1, the labyrinth seal oil return device according to the present invention includes a rotor assembly 1 penetratingly connected in a gearbox housing 4, an input end of the rotor assembly 1 is disposed on an input side wall of the gearbox housing 4, an outer wall of an output end of the rotor assembly 1 is connected to an output side wall of the gearbox housing 4 through a bearing 2, the oil return device further includes a labyrinth seal 3, an oil return storage assembly 5 disposed in an inner cavity 6 of the gearbox housing 4, and an oil return passage 41 disposed on an output side shell wall of the gearbox housing 4 and located on a lower side of the bearing 2, the labyrinth seal 3 is disposed around the rotor assembly 1 on the output side of the bearing 2, the output side of the rotor assembly 1 is communicated with the inner cavity 6 of the gearbox housing 4 through a labyrinth gap passage 31 and an oil return passage 41 of the labyrinth seal 3, the inlet end of the oil return channel 41 is respectively communicated with the labyrinth clearance channel 31 of the labyrinth air seal 3 and the oil passing labyrinth channel on the output side of the bearing 2, the outlet end of the oil return channel 41 penetrates through the inner cavity 6 along the inner side shell wall of the output side of the gearbox box body 4 and is communicated with the inner cavity 6, the head end of the oil return storage component 5 is fixed in the inner cavity 6 of the gearbox box body 4 and is communicated with the outlet end of the oil return channel 41, and the tail end of the oil return storage component 5 is arranged in the inner cavity 6 of the gearbox box body 4 in a mode that the tail end of the oil return storage component 5 is lower than the head end of the oil return storage component. When the rotor component 1 of the machine rotates at a high speed, the lubricating oil in the inner cavity 6 of the gear box body 4 is stirred sharply, so that the internal pressure changes sharply, the lubricating oil and the leaked gas permeate through the rotor component 1 and flow into the labyrinth air seal 3 for balanced decompression, the lubricating oil entering the labyrinth air seal 3 flows back into the inner cavity 6 of the gear box body 4 through the labyrinth clearance channel 31 (labyrinth oil seal oil return channel) and the oil return channel 41, the returned lubricating oil is stored in the tail end of the oil return storage component 5, if certain cavity pressure exists in the inner cavity 6 of the gear box body 4, the cavity pressure can be offset through the height difference of the lubricating oil filled in the tail end and the head end of the oil return storage component 5, so that the lubricating oil in all the oil return channels 41 can smoothly return to the oil return storage component 5 arranged in the inner cavity 6 without bearing the cavity pressure in the gear box body 4, therefore, the problem of failure and oil leakage of the labyrinth air seal part 3 caused by the fact that the cavity pressure in the gear box body 4 is increased due to oil stirring, temperature rising and the like of the rotor component 1 of the high-speed rotating machine is solved, the problem of failure and oil leakage of the labyrinth air seal part 3 caused by the fact that the cavity pressure is increased due to the fact that gas leaks into the machine of a compressor machine is solved, and the problem that the size of related parts needs to be increased due to the fact that the oil sealing capacity of the labyrinth air seal part 3 is improved is solved.
In the utility model, as shown in fig. 1, a first labyrinth passage 32 communicated with the labyrinth clearance passage 31 of the labyrinth air seal 3 is arranged at the periphery of the labyrinth air seal 3 and inside the output side of the gearbox housing 4, a second labyrinth passage 33 communicated with each other is arranged between the first oil passage 32 and the output side of the bearing 2, and the labyrinth clearance passage 31 of the labyrinth air seal 3 is communicated with the inlet end of the oil return passage 41 through the first labyrinth passage 32 and the second labyrinth passage 33 in sequence; the oil passing channel groove 34 is arranged on the output side of the bearing 2 and below the second labyrinth channel 33, the upper end of the oil passing channel groove 34 is communicated with the lower part of the end part of the second labyrinth channel 33 on the side far away from the first labyrinth channel 32, and the lower end of the oil passing channel groove 34 is communicated with the inlet end of the oil return channel 41; when the rotor assembly 1 is supported on the bearing 2 to rotate at a high speed, lubricating oil is required to be provided for the rotor assembly 1 and the bearing 2 to realize lubrication and cooling when the machine is ensured to operate, and in order to ensure that the lubricating oil does not leak to the outside of the machine, the labyrinth air seal component 3 is arranged to realize sealing, the labyrinth clearance channel 31 on the labyrinth air seal 3 sequentially passes through the first labyrinth channel 32, the second labyrinth channel 33 and the oil passing channel groove 34 and the oil return channel 41 to be communicated with each other, so that the labyrinth air seal 3 can be promoted to return the lubricating oil to the inner cavity 6 of the gearbox box body 4 through the oil return channel 41, and the oil return reaches the sealing effect and is more smooth.
As shown in fig. 2, the oil return storage component 5 includes an oil return sealing support pipe 51 and an oil return sealing storage elbow 50 which are connected with each other, the outlet end of the oil return channel 41 is communicated with the head end of the oil return sealing support pipe 51, the head end of the oil return sealing support pipe 51 is fixedly connected to the inner side wall of the inner cavity 6 of the gear box body 4 through a flange 56, an O-shaped sealing member (not shown) is arranged between the flange 56 and the inner side wall of the inner cavity 6 of the gear box body 4, the inner side wall of the inner cavity on one side of the outlet end of the oil return channel 41 is in sealing connection with the head end of the oil return sealing support pipe 51 through the O-shaped sealing member (O-shaped sealing ring), the flange 56, the tail end of the oil return sealing support pipe 51 vertically extends towards the bottom direction of the inner cavity 6 of the gear box body 4, and the oil return sealing storage elbow 50 is sequentially connected with the tail end of the oil return sealing support pipe 51 and the multiple segments in an up-and down manner in the vertical direction, the maximum level of the oil return sealing storage elbow pipe 50 is lower than the head end of the oil return sealing support pipe 51. The return oil sealing storage elbow 50 is communicated with the labyrinth clearance channel 31 on the labyrinth air seal 3 through a return oil sealing support pipe 51, an oil return channel 41, an oil passing channel groove 34, a second labyrinth channel 33 and a first labyrinth channel 32; the labyrinth seal oil return storage component 5 is connected with the inner wall of the gear box body 4, the lubricating oil flows into an oil return seal support pipe 51 and an oil return seal storage elbow 50 of the oil return storage component 5 for filling and storage, the oil return storage component 5 is filled with the lubricating oil 52 with the same mark number as that required by the machine operation, because the tail end 54 (one end of a lubricating oil outlet) of the oil return seal storage elbow 50 is positioned below the horizontal line of the head end 53 of the oil return seal support pipe 51, the height H1 between the head end 53 of the oil return seal support pipe 51 and the lowest end of the oil return seal storage elbow 50 is fixed or variable, and the height difference H2 between the head end 53 of the oil return seal support pipe 51 and the tail end 54 (one end of the lubricating oil outlet) of the oil return seal storage elbow 50 is fixed or variable, when a certain cavity pressure P exists in the inner cavity 6 of the gear box body 4, by filling the oil return sealing support pipe 51 and the oil return sealing storage elbow pipe 50 of the labyrinth sealing oil return device 5 with the lubricating oil 52, the cavity pressure P can be counteracted by the height difference H3 between the height of the lubricating oil surface at the side of the head end 53 of the oil return sealing support pipe 51 and the tail end (the end of the lubricating oil outlet) of the oil return sealing storage elbow pipe 50, wherein the height of the lubricating oil surface at the side of the head end 53 is higher than the horizontal height of the highest oil surface in the oil return sealing storage elbow pipe 50, so that the lubricating oil in all the oil return channels 41 can smoothly flow back to the inside of the oil return sealing support pipe 51 without bearing the cavity pressure P in the gearbox box body 4 and directly flow back into the gearbox box body 4, and the air flow cavity pressure in the gearbox box body 4 is also prevented from returning to the labyrinth air seal 3, so as to achieve the oil return sealing effect.
In the embodiment of the present invention, as shown in fig. 1, a U-shaped oil return sealing storage elbow 50 is connected to the end of the oil return sealing support tube 51 along the vertical direction; the horizontal height of the head end of the oil return sealing support pipe 51 is more than 1.5 times larger than the horizontal height of the tail end of the U-shaped oil return sealing storage elbow pipe 50, the height H1 between the head end 53 of the oil return sealing support pipe 51 and the lowest end of the U-shaped oil return sealing storage elbow pipe 50 is fixed or variable, the height difference H2 between the head end 53 of the oil return sealing support pipe 51 and the tail end 54 (lubricating oil outlet end) of the U-shaped oil return sealing storage elbow pipe 50 is fixed or variable, if a certain cavity pressure P exists in the inner cavity 6 of the gearbox box body 4, the cavity pressure P can be counteracted by filling the lubricating oil 52 in the oil return sealing support pipe 51 and the U-shaped oil return sealing storage elbow pipe 50, and the height difference H3 existing between the lubricating oil surface height of the head end 53 side of the oil return sealing support pipe 51 and the tail end (lubricating oil outlet end) of the oil return sealing storage elbow pipe 50, the lubricating oil in all the oil return channels 41 can smoothly flow back to the vacant part of the oil return sealing support pipe 51 without bearing the cavity pressure P in the gearbox body 4 and does not directly flow back into the gearbox body 4, and due to the existence of the cavity pressure P, the lubricating oil 52 stored in the tail end 54 of the U-shaped oil return sealing storage elbow pipe 50 does not flow into the gearbox body 4, and the air flow cavity pressure in the gearbox body 4 is prevented from returning to the labyrinth air seal 3, so that the oil return sealing effect is achieved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. The utility model provides a labyrinth seals oil return device, oil return device is including running through the rotor subassembly that sets up in the gear box, the input of rotor subassembly is connected on the input side lateral wall of gear box, the outer wall of the output of rotor subassembly passes through the bearing and connects on the output side lateral wall of gear box, its characterized in that: the oil return device further comprises a labyrinth air seal, an oil return storage component and an oil return channel, the oil return storage component is arranged in an inner cavity of the gearbox body, the oil return channel is arranged on the inner side of the output side shell wall of the gearbox body and is positioned on the lower side of the bearing, the head end of the oil return storage component is fixed in the inner cavity of the gearbox body and is communicated with the outlet end of the oil return channel, the labyrinth air seal is arranged around a rotor component on the output side of the bearing, the output side of the rotor component is communicated with the inner cavity of the gearbox body through a labyrinth gap channel and an oil return channel of the labyrinth air seal, the outlet end of the oil return channel is communicated with the inner cavity along the inner wall of the output side of the gearbox body, and the tail end of the oil return storage component is arranged in the inner cavity of the gearbox body in a manner of being lower than the head end.
2. The labyrinth oil return device according to claim 1, characterized in that: the return oil storage assembly comprises an oil return sealing storage elbow pipe and an oil return sealing support pipe which are connected with each other, an outlet end of an oil return channel is communicated with a head end of the oil return sealing support pipe, the head end of the oil return sealing support pipe is fixedly connected to the inner cavity inner side wall of the gear box body through a flange, the tail end of the oil return sealing support pipe extends towards the bottom of the inner cavity of the gear box body vertically, one section or multiple sections of the tail end of the oil return sealing support pipe are connected with the oil return sealing storage elbow pipe in a sequentially fluctuating mode, and the highest level of the oil return sealing storage elbow pipe is lower than the head end of the oil return sealing support pipe.
3. The labyrinth oil return device according to claim 2, characterized in that: and the tail end of the oil return sealing support pipe is connected with an oil return sealing storage elbow pipe in a U shape along the vertical direction.
4. The labyrinth oil return device according to claim 3, characterized in that: the horizontal height of the head end of the oil return sealing supporting pipe is more than 1.5 times greater than the horizontal height of the tail end of the U-shaped oil return sealing storage elbow pipe.
5. The labyrinth oil return device according to claim 1, characterized in that: the labyrinth clearance passage of the labyrinth air seal is communicated with the inlet end of the oil return passage sequentially through the first labyrinth passage and the second labyrinth passage.
6. The labyrinth oil return device according to claim 5, characterized in that: the bearing output side is arranged below the second labyrinth passage and is provided with an oil passing passage groove, the upper end of the oil passing passage groove is communicated with the lower part of the end part of the second labyrinth passage far away from one side of the first labyrinth passage, and the lower end of the oil passing passage groove is communicated with the inlet end of the oil return passage.
7. The labyrinth oil return device according to claim 2, characterized in that: the oil return device is characterized in that an O-shaped sealing element is arranged between the flange and the inner side wall of the inner cavity of the gearbox box body, and the inner side wall of the inner cavity on one side of the outlet end of the oil return channel is in sealing connection with the head end of the oil return sealing supporting tube through the O-shaped sealing element and the flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122992417.9U CN216923202U (en) | 2021-11-30 | 2021-11-30 | Labyrinth seal oil return device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122992417.9U CN216923202U (en) | 2021-11-30 | 2021-11-30 | Labyrinth seal oil return device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216923202U true CN216923202U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122992417.9U Active CN216923202U (en) | 2021-11-30 | 2021-11-30 | Labyrinth seal oil return device |
Country Status (1)
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| CN (1) | CN216923202U (en) |
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2021
- 2021-11-30 CN CN202122992417.9U patent/CN216923202U/en active Active
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