CN216241387U - High-speed rotor composite structure of fan - Google Patents
High-speed rotor composite structure of fan Download PDFInfo
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- CN216241387U CN216241387U CN202122018193.1U CN202122018193U CN216241387U CN 216241387 U CN216241387 U CN 216241387U CN 202122018193 U CN202122018193 U CN 202122018193U CN 216241387 U CN216241387 U CN 216241387U
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- gear shaft
- box body
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Abstract
The utility model discloses a high-speed rotor combination structure of a fan, which comprises a gear shaft and an impeller, wherein the gear shaft is connected in a gear box body in a penetrating way, the impeller is connected on the gear shaft, the input end of the gear shaft is connected on the side wall of the input side of the gear box body, the impeller is installed after the output end of the gear shaft extends out of the output side of the gear box body, the input end of the gear shaft is arranged in the input side of the gear box body through a radial bearing, a labyrinth seal is arranged on the gear shaft at the output side of the gear box body, a radial thrust composite bearing is sleeved on the gear shaft between the output side of the gear box body and the labyrinth seal, a fixing bolt which is connected with the radial thrust composite bearing in the axial line direction is arranged in the gear box body, and an airtight seal piece is sleeved on the gear shaft between the back sides of the impellers. The utility model effectively solves the problem of inconvenient installation of the rotor structure of the high-speed shaft, can realize assembly and disassembly without disassembling the impeller, and does not damage the dynamic balance state of the rotor structure.
Description
Technical Field
The utility model belongs to the technical field of air blowers, and particularly relates to a high-speed rotor combination structure of a fan.
Background
The existing single-stage high-speed centrifugal fan adopting gear acceleration is convenient to install and disassemble because a gear box body of the existing single-stage high-speed centrifugal fan adopts an upper and lower split structure, but along with the continuous improvement of the rotating speed of the fan, the sensitivity of a high-speed shaft rotor to the misalignment of a bearing hole of the box body or the cylindricity error can be also improved rapidly, and the problem of the stable operation of the rotor is brought. The cylinder type box body structure can ensure good concentricity and cylindricity of the bearing hole, is widely applied in the field of high-speed transmission, and has the problem of difficult installation and disassembly. Particularly, the high-speed rotor of the fan is additionally provided with parts such as an impeller and the like, so that the size is larger, the assembly difficulty is increased, the high-speed rotor can reach a good vibration level only by performing dynamic balance on the whole assembly, and after the high-speed rotor assembly performs the dynamic balance, the direct assembly can be performed preferably without disassembling parts on the shaft, so that the dynamic balance state can be ensured not to be damaged; the existing rotor structure usually needs to be assembled into a cylinder-mounted box body after the impeller is disassembled, which is equivalent to destroy the dynamic balance state, and is unfavorable for the rotor operation, so that the high-speed rotor structure of the fan is a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-speed rotor combination structure of a fan, which effectively solves the problem of inconvenient installation of a high-speed shaft rotor structure, can realize assembly and disassembly without disassembling an impeller, and does not damage the dynamic balance state of the rotor structure. In order to achieve the purpose, the utility model adopts the following technical scheme:
according to one aspect of the utility model, a high-speed rotor combination structure of a fan is provided, the rotor combination structure comprises a gear shaft which is penetratingly connected in a gearbox body and an impeller which is connected at the output end part of the gear shaft, the input end of the gear shaft is connected on the side wall of the input side of the gearbox body, the output end of the gear shaft extends out of the side wall of the output side of the gearbox body and then is provided with the impeller, the rotor combination structure further comprises a radial bearing, an air sealing piece, a labyrinth seal and a radial thrust composite bearing, the input end of the gear shaft is arranged in the side wall of the input side of the gearbox body through the radial bearing, the labyrinth seal is arranged on the gear shaft at the output side of the gearbox body, the radial thrust composite bearing is sleeved on the gear shaft between the side wall of the output side of the gearbox body and a labyrinth seal, and the labyrinth seal is matched and fixed with the radial thrust composite bearing through bolts, and a fixing bolt connected with the radial thrust composite bearing in an axial line direction is arranged in the gearbox body, and the gear shaft between the back sides of the impellers is sleeved with the air-tight seal piece.
In a further preferred mode of the above aspect, a ventilation gap channel is provided between the end of the labyrinth seal and the end of the air-tight seal in the direction from the gear shaft to the back edge of the impeller, and the outer diameter of the air-tight seal is larger than that of the radial thrust composite bearing.
According to a further preferable mode of the scheme, the outer wall of the labyrinth seal is sleeved with an O-shaped ring, and the outer wall of the labyrinth seal is in sealing contact with the side wall of the output side of the gearbox box body through the O-shaped ring.
According to the scheme, the outer wall of the air-tight sealing piece is sleeved with the air-tight seat, and the outer wall of the air-tight sealing piece is connected with the outer side wall of the output side of the gearbox body through the air-tight seat.
In a further preferred embodiment of the above-mentioned solution, the outer wall of the air-tight seat is provided with a vent hole.
According to the scheme, the input side of the gear box is provided with the box cover, the radial bearing is sleeved in the box cover, and the input end of the gear shaft is arranged in the box cover through the radial bearing.
In a further preferred mode of the above scheme, oil return passages communicated with each other are arranged between the labyrinth seals and the inner cavity of the gearbox body between the labyrinth seals.
In a further preferred embodiment of the above-mentioned solution, the lock nut is fitted over the gear shaft between the front sides of the impellers.
Above-mentioned scheme is further preferred, but is provided with open and shut observation window in fixing bolt's head dead side, can observe the meshing condition of gear in the gear box and install and dismantle fixing bolt through this observation window to but quick installation and dismantlement gear shaft pack the rotor integrated configuration wholly into and take out the gear box.
In summary, the utility model adopts the above technical scheme, and the utility model has the following technical effects:
the utility model realizes the integral assembly and disassembly of the high-speed rotor structure of the fan in the gearbox body, is convenient to ensure the rotation precision and the assembly precision of the rotor structure at high speed, reduces the assembly difficulty, and simultaneously ensures the effects of air sealing and oil sealing.
Drawings
FIG. 1 is a schematic view of the overall layout structure of a high-speed rotor assembly of a wind turbine according to the present invention;
FIG. 2 is a schematic view of the mounting structure of the gear shaft of the present invention;
FIG. 3 is a schematic view of the mounting structure of the cover and radial bearing of the present invention;
in the drawing, a rotor combined structure 1, an air seal seat 2, a gear box body 3, a fixing bolt 4, an observation window 5, a box cover 6, a radial bearing 7, a locking nut 11, a gear shaft 12, an impeller 13, an air seal 14, a labyrinth seal 15, an O-shaped ring 16, a screw 17, a radial thrust composite bearing 18, an air-permeable clearance channel 31, an oil return channel 32 and a shaft hole 60.
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 and 2, the rotor assembly 1 of the present invention includes a gear shaft 12 penetrating into a gear box 3 and an impeller 13 connected to an output end of the gear shaft 12, an input end of the gear shaft 12 is connected to an input side wall of the gear box 3, an output end of the gear shaft 12 extends out from the output side wall of the gear box 3 and then the impeller 13 is mounted on the output side wall of the gear box 3, the gear box 3 is a box of a cylindrical structure, the rotor assembly 1 further includes a radial bearing 7, an air-tight seal 14, a labyrinth seal 15 and a radial thrust compound bearing 18, the input end of the gear shaft 12 is disposed in the input side wall of the gear box 3 through the radial bearing 7, the labyrinth seal 15 is disposed on the gear shaft 12 on the output side of the gear box 3, the labyrinth seal 15 is a labyrinth seal structure, the radial thrust composite bearing 18 is sleeved on the gear shaft 12 between the inner side wall of the output side of the gear box body 3 and the labyrinth seal 15, the labyrinth seal 15 is matched and fixed with the radial thrust composite bearing 18 through a screw 17, the fixing bolt 4 connected with the radial thrust composite bearing 18 in the axial line direction is arranged in the gear box body 3, the openable observation window 5 is arranged on the right side of the head part of the fixing bolt 4, the airtight sealing piece 14 is sleeved on the gear shaft 12 between the back sides of the impellers 13, and the locking nut 11 is sleeved on the gear shaft 12 between the front sides of the impellers 13; the outer wall of the labyrinth seal 15 is sleeved with an O-shaped ring 16, the outer wall of the labyrinth seal 15 is in sealing contact with the side wall of the output side of the gear box body 3 through the O-shaped ring 16, a labyrinth oil seal oil return channel 32 communicated with each other is arranged between the inner cavity of the gear box body 3 in and between the labyrinth seal 15, the air seal seat 2 is firstly fixed on the gear box body 3, then the fan high-speed gear shaft 12 is integrally installed in the arrow direction (the fan high-speed gear shaft 12 is integrally installed in the gear box body 3 from the output side to the input side of the gear box body 3), the radial thrust composite bearing 18 is sleeved on the gear shaft 12 from the output side of the gear box body 3 to the cavity direction of the gear box body 3, and then the cavity of the gear box body 3 is connected with the radial thrust composite bearing 18 through a fixing bolt 4, so that the fan high-speed gear shaft 12 and the gear box body 3 are fixed, the impeller 13 and the high-speed gear shaft 12 are fixed and torque-transmitted through a lock nut 11, the air-tight seal 14 is fixed on the high-speed gear shaft 12 through interference connection, and the radial thrust composite bearing 18 is of an up-down split structure and is clamped on the high-speed gear shaft 12; the labyrinth seal 15 is fitted with a radial thrust compound bearing 18 and secured together by a screw 17. The labyrinth seal 15 and the gearbox housing 3 are sealed through the O-shaped ring 16, the labyrinth seal 15 realizes the static seal at the output side of the gearbox housing 3 through the O-shaped ring 16, and the lubricating oil leaked and flowed out through the radial thrust composite bearing 18 returns to the cavity of the gearbox housing 3 through the oil return channel 32 and oil return holes (the oil return holes and the oil return channel 32 are communicated into a whole in the same way) on the gearbox housing 3 after passing through labyrinth seal teeth of the labyrinth seal 15, so that the sealing of the lubricating oil is realized.
In the utility model, an air gap channel 31 from the gear shaft 12 to the back edge direction of the impeller 13 is arranged between the end part of the labyrinth seal 15 and the end part of the air seal 14, the air gap channel 31 is arranged between the end part of the labyrinth seal 15 and the end part of the air seal 14 in a gap manner, an air seal seat 2 is sleeved on the outer wall of the air seal 14, the outer wall of the air seal 14 is connected with the outer side wall of the output side of the gearbox box body 3 through the air seal seat 2, the air seal 14 belongs to typical labyrinth seal, the air seal and exhaust effects are realized through clearance fit, a vent hole (not shown) communicated with the inside of the air seal seat is arranged on the side wall of the output side of the gearbox box body, and part of leaked gas is exhausted to the atmosphere through the vent hole; the gas leaked from the back of the impeller 13 passes through the gas seal 14 to block decompression and enters the gas seal 14 and the gas seal base 2 through the gas permeable gap channel 31, and the gas leaked from the back of the impeller 13 is discharged to the atmosphere through the gas seal 14 and the vent hole; because the gas leaked from the back of the impeller 1 still has certain pressure after being decompressed by the gas seal 14, the leaked gas with certain pressure can not be completely and directly discharged into the atmosphere through the gas seal 14, so that a part of the leaked gas with certain pressure enters the gas seal seat 2 through the gas seal 14, is decompressed again, enters the vent hole on the side wall of the output side of the gearbox body and is discharged from the vent hole through the gas seal seat 2, and most of the leaked gas is discharged into the atmosphere through the gas seal 14, thereby improving the running efficiency of the compressor, reducing the risk of oil leakage of the oil seal part of the gear shaft 2 driving the impeller 13 to rotate, reducing the noise generated by the discharged leaked gas, and reducing the safety risk caused by the leaked high-pressure high-temperature gas.
In the present invention, the radial bearing 7 is fixed to the case cover 6. A box cover 6 is arranged at the input side of the gear box body 3, the radial bearing 7 is sleeved in the box cover 6, the input end of the gear shaft 12 is arranged in the box cover 6 through the radial bearing 7, when the whole rotor combination structure is arranged in the gear box body 3, the box cover 6 is fixed on the side wall of the input side of the gear box body 3, after the fixing position is adjusted, the input end of the fan high-speed gear shaft 12 is integrally arranged along the arrow direction (namely the input side from the output side of the gear box body 3 is integrally arranged in the gear box body 3), the input end of the gear shaft 12 is inserted into the shaft hole 60 of the box cover 6, the radial bearing 7 is sleeved into the shaft hole 60 of the box cover 6 along the input end of the gear shaft 12, the gear shaft 12 is fixed in the shaft hole 60 on the box cover 6 through the radial bearing 7, the gear shaft 12 is fixedly sleeved in the radial bearing 7, the outer wall of the radial bearing 7 is clamped with the inner wall of the shaft hole 60 of the box cover 6 and then is fixed by bolts, after the radial bearing 7 and the output end of the gear shaft 12 are fixed, the fixing bolt 4 and the radial thrust composite bearing 18 are connected through the observation window 5 in front of the opposite side of the head of the fixing bolt 4, so that the gear shaft 12 is integrally fixed in the gear box body 3; when the rotor structure is disassembled, the fixing bolt 4 can be firstly disassembled through the observation window 5, so that the radial thrust composite bearing 18 and the gear box body 3 are separated, no connection and fixation relation exists, the fan high-speed gear shaft 12 can drive the impeller 13 to be integrally pulled out from the output side of the gear box body 3, so that the high-speed rotor structure of the fan can be integrally assembled and disassembled on the gear box body 3, the high-speed rotation precision of the rotor structure at high speed is conveniently ensured, the assembly precision is ensured, the assembly difficulty is reduced, and the air-sealing and oil-sealing effects are ensured simultaneously, the labyrinth seal 15 is fixed on the radial thrust composite bearing 18 and has the same outer diameter, so that the lubricating oil leaked in the cavity of the gear box body 3 can be completely sealed and can flow back into the gear box body 3 through the labyrinth seal oil return channel 32, the lubricating oil is prevented from leaking into the air from the labyrinth seal 15, and the outer diameter of the air-seal 14 is slightly larger than the outer diameter of the radial thrust composite bearing 18, the radial thrust composite bearing 18 is convenient to insert into the space range of the inner wall of the output side of the gearbox body 3 from one side of the impeller 13 from the inner wall of the air-tight seal 14, so that the radial thrust composite bearing is mutually matched and assembled on the gear shaft 12, the assembly is more convenient, the gas leaked from the back of the impeller 13 can be effectively prevented from entering the radial thrust composite bearing 18 through the labyrinth seal 15 after the gas leaked from the back of the impeller 13 is blocked and decompressed by the air-tight seal 14, and the gas leaked from the labyrinth seal 15 is also blocked; therefore, the gear shaft 12 is integrally assembled in the cylinder-type structural box body, so that the problem of inconvenient installation of the rotor structure of the high-speed shaft is solved, the assembly and disassembly can be realized without disassembling the impeller, and the dynamic balance state of the rotor structure is not damaged.
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 (9)
1. The utility model provides a high-speed rotor integrated configuration of fan, rotor integrated configuration includes the gear shaft of through connection in the gear box and connects the impeller at gear shaft output end, the input of gear shaft is connected on the input side lateral wall of gear box, the output of gear shaft is installed after stretching out from the output side lateral wall of gear box the impeller, its characterized in that: the rotor combined structure further comprises a radial bearing, an air-tight seal piece, a labyrinth seal and a radial thrust composite bearing, wherein the input end of a gear shaft is arranged in the side wall of the input side of the gear box body through the radial bearing, the labyrinth seal is arranged on the gear shaft of the output side of the gear box body, the radial thrust composite bearing is sleeved on the gear shaft between the side wall of the output side of the gear box body and the labyrinth seal, the labyrinth seal is matched and fixed with the radial thrust composite bearing through a screw rod, a fixing bolt connected with the radial thrust composite bearing in the axial line direction is arranged in the gear box body, and the air-tight seal piece is sleeved on the gear shaft between the back sides of the impellers.
2. The high-speed rotor combination structure of the fan according to claim 1, characterized in that: and an air-permeable clearance channel in the direction of the back edge of the impeller from the axial direction of the gear is arranged between the end part of the labyrinth seal and the end part of the air-tight seal, and the outer diameter of the air-tight seal is larger than that of the radial thrust composite bearing.
3. The high-speed rotor combination structure of the fan according to claim 1 or 2, characterized in that: the outer wall of the labyrinth seal is sleeved with an O-shaped ring, and the outer wall of the labyrinth seal is in sealing contact with the side wall of the output side of the gearbox box body through the O-shaped ring.
4. The high-speed rotor combination structure of the fan according to claim 2, characterized in that: the outer wall of the air-tight sealing piece is sleeved with an air-tight seat, and the outer wall of the air-tight sealing piece is connected with the outer side wall of the output side of the gearbox body through the air-tight seat.
5. The high-speed rotor combination structure of the fan according to claim 4, wherein: and a vent hole communicated with the inside of the air seal seat is formed in the side wall of the output side of the gearbox body.
6. The high-speed rotor combination structure of the fan according to claim 1, characterized in that: the input side of the gear box body is provided with a box cover, the radial bearing is sleeved in the box cover, and the input end of the gear shaft is arranged in the box cover through the radial bearing.
7. The high-speed rotor combination structure of the fan according to claim 3, wherein: and oil return channels which are communicated with each other are arranged between the labyrinth seals and the inner cavity of the gearbox body between the labyrinth seals.
8. The high-speed rotor combination structure of the fan according to claim 3, wherein: and a lock nut is sleeved on the gear shaft between the front sides of the impellers.
9. The high-speed rotor combination structure of the fan according to claim 3, wherein: an openable and closable observation window is provided in front of the head portion side of the fixing bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122018193.1U CN216241387U (en) | 2021-08-25 | 2021-08-25 | High-speed rotor composite structure of fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122018193.1U CN216241387U (en) | 2021-08-25 | 2021-08-25 | High-speed rotor composite structure of fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216241387U true CN216241387U (en) | 2022-04-08 |
Family
ID=80982228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122018193.1U Active CN216241387U (en) | 2021-08-25 | 2021-08-25 | High-speed rotor composite structure of fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216241387U (en) |
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2021
- 2021-08-25 CN CN202122018193.1U patent/CN216241387U/en active Active
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