CN101446297A - Two-stage axial flow fan bearing device - Google Patents
Two-stage axial flow fan bearing device Download PDFInfo
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- CN101446297A CN101446297A CNA2008102301690A CN200810230169A CN101446297A CN 101446297 A CN101446297 A CN 101446297A CN A2008102301690 A CNA2008102301690 A CN A2008102301690A CN 200810230169 A CN200810230169 A CN 200810230169A CN 101446297 A CN101446297 A CN 101446297A
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Abstract
A two-stage axial flow fan bearing device comprises a bearing box, a fixed end bearing seat and a float end bearing seat, and is characterized in that spherical roller bearings are assembled in the fixed end bearing seat; a thrust bearing seat is arranged at the fixed end; thrust bearings are assembled in the thrust bearing seat; spherical roller bearings are assembled in the float end bearing seat; flanges are respectively and fixedly connected at the two ends of the bearing box; and the fixed end bearing seat and the float end bearing seat are respectively and fixedly connected with the flanges at the two ends. The device adopts an allocation mode of three bearings that a bearing is arranged at the float end and a roller bearing and a thrust bearing are arranged at the fixed end, so that the device is provided with a good self-adjusting cardiac function and a good adjustment ability for the deflection of the center shaft and the main shaft; the main shaft seal is a combination of mechanical seal and two nonmetal seals, thereby greatly reducing the probability of lubricating oil leakage and causing the seal to be more reliable; a traditional mounted base is changed to a circular flange connected with a housing, thereby greatly increasing the stability of rotor operation; when temperature changes, although immobility of the bearings can cause main shaft bending and the like, the bearings are not caused to bear extra force and be damaged in advance; and the device reduces manufacture cost, and simplifies product structure.
Description
Technical field
The invention belongs to a kind of induced draught fan modular construction, particularly a kind of two-stage axial flow fan bearing device.
Background technique
For satisfying the energy-saving and emission-reduction requirement, the function of newly-built large-scale coal-fired unit induced draught fan is promoted to overcoming whole resistances of boiler induced draught system, denitrating system, desulfurizing tower system by the original boiler air inducing resistance that overcomes, make the total head and the flow of induced draught fan all increase, original induced draught fan structure has not satisfied the requirement of system performance, and the most significant is exactly that induced draught fan becomes the twin-stage impeller by the single-stage impeller.This just requires bearing pack corresponding change will be arranged to adapt to the requirement of induced draught fan.The structure of the bearing pack of at present known twin-stage induced draught fan is five bearing preparations, floating end is a roller bearing and an angular contact bearing, fixed end is the angular contact bearing of a roller bearing and two series connection, the deficiency of its existence is: 1, five bearing pack are contained on the axle, two kinds of bearings do not have the self-regulated heart function, concentricity requirement to the two end axles bearing is very high, 2, bearing seal is the non-contact mechanical seal of nonmetal combination, can only reduce the leakage that lubricant oil prolongs main shaft, and one nonmetal sealing is easy to cause because of the problem of part the inefficacy of whole sealing function.3, on-stream, main shaft has amount of deflection, be easy to produce bearing and make bearing additionally stressed because of no self-regulated heart function in five bearings, thereby the temperature rising causes bearing to damage in advance.4, in order to reduce above-mentioned adverse effect, the span of main shaft will shorten greatly, because the loading characteristic of twin-stage rotor, this just makes the stability of fan rotor operation reduce, extraneous interference is easy to make rotor-support-foundation system to enter the irregular operation state, has hidden danger.5, the configuration of five bearings, price are surplus in the of 20 ten thousand yuan, make cost improve greatly, simultaneously the delivery date of bearing long, do not satisfy the requirement of manufacturing schedule.
Summary of the invention
The purpose of this invention is to provide a kind of two-stage axial flow fan bearing device, has good self-regulated heart function, the centering of bearing housing and the amount of deflection of main shaft all there is good adjustment capability, improve the stability of rotor set operation, improve sealability, structural design simplification, reasonable reduces production costs, and improves working life.
The objective of the invention is to be achieved through the following technical solutions: it comprises bearing housing, fixed end bearing support, float step bearing seat, it is characterized in that: assembling spheric roller bearing in the fixed end bearing support, this end also is provided with thrust metal, assembling thrust-bearing in the thrust metal, assembling spheric roller bearing in the float step bearing seat, the bearing housing two ends flange that is fixedly connected respectively, fixed end bearing support and float step bearing seat are fixedly connected respectively on the flange at two ends.
Above-mentioned fixed end bearing support outer end assembling flinger ring and spacer, assembling reinforced seal part between flinger ring and spacer, at the outside of reinforced seal part assembling gland, at float step bearing seat outer end assembling flinger ring and spacer, assembling reinforced seal part between flinger ring and spacer is at the outside of reinforced seal part assembling gland.
The longitudinal and transverse gusset of welding on the above-mentioned bearing housing outer wall.
The present invention compared with prior art has following advantage:
1. to adopt floating end be a spheric roller bearing in the present invention, fixed end is a spheric roller bearing and spherical roller thrust bearing configuration mode of totally three bearings, have good self-regulated heart function, good adjustment capability is all arranged for the centering of main shaft and the amount of deflection of main shaft.2, main shaft seal is the combination of mechanical seal and two kinds of nonmetal sealings, i.e. v-seal and reinforced seal.A small amount of oil that mechanical seal leaks out is flowed back in the bearing housing by the spill port of v-seal prevention back from the bottom; If also have oil leakage, then will be stoped, and flow back to bearing housing from corresponding spill port by reinforced seal, significantly reduced the probability of oil leak, make sealing more reliable.3, change traditional mounting base into connect round flange, significantly improved the stability of rotor operation with casing.4, the price of three bearings of the present invention is surplus in the of 50,000 yuan, buys easily on market, compares with suitable common bearing pack, surplus the price difference of separate unit fan bearing is about 170,000 yuan.General power station project is 4 typhoon machines, can save 70 surplus ten thousand yuan.5, the spheric roller bearing at two ends is installed in the bearing support, and bearing outside and bearing support are Spielpassung.When the rotor heat expansion, floating end is to moving away from the fixed end direction, can not make main shaft bending etc. make that bearing is extra stressed to be damaged in advance during temperature variation because of bearing is motionless.6, on the bearing housing outer wall, be welded with longitudinal and transverse gusset, replaced the bearing housing of cast iron structure fully.Both reduce cost of production, simplified the structure of product again.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is fixed end bearing part (B portion) the structure for amplifying schematic representation of Fig. 1.
Fig. 3 is floating end bearing part (A portion) the structure for amplifying schematic representation of Fig. 1.
Embodiment
Concrete structure of the present invention is as follows: see Fig. 1-3, by the longitudinal and transverse gusset 16,18 of welding on bearing housing 19 outer walls of welded steel plate.Bearing housing 19 two ends are welded flange 12,21 respectively.Fixed end bearing support 10 and thrust metal 14 are connected on the flange 12 by bolt.Float step bearing seat 20 is connected on the flange 21 by bolt.Assembling spheric roller bearing 9 in the fixed end bearing support 10, assembling thrust roller bearing 13 in the thrust metal 14, take back the flinger ring 8 and the spacer 4 of oilhole in the assembling of fixed end bearing support 10 outer ends, assembling reinforced seal part 6 between flinger ring 8 and spacer 4 is at the outside of reinforced seal part 6 assembling gland 5.Assembling spheric roller bearing 28 in float step bearing seat 20.Assemble flinger ring 22 and the spacer of taking back oilhole in float step bearing seat 20 outer ends, assembling reinforced seal part 26 between flinger ring 22 and spacer 27 is at the outside of reinforced seal part 26 assembling gland 25.The oil inlet pipe 2 of bringing hydraulic fluid port 3 into connects the bearing at two ends.Bearings at both ends is provided with oil circuit 1 and 11 respectively.In the bottom of bearing housing 19 return opening 17 is set.Main shaft 15 is assembled on the bearing at two ends.
The present invention is specially adapted to the coal-fired thermal power unit boiler induced draught fan of single-machine capacity at 600～1000MW.
Claims (3)
1, a kind of two-stage axial flow fan bearing device, it comprises bearing housing, fixed end bearing support, float step bearing seat, it is characterized in that: assembling spheric roller bearing in the fixed end bearing support, this end also is provided with thrust metal, assembling thrust-bearing in the thrust metal, assembling spheric roller bearing in the float step bearing seat, the bearing housing two ends flange that is fixedly connected respectively, fixed end bearing support and float step bearing seat are fixedly connected respectively on the flange at two ends.
2, two-stage axial flow fan bearing device according to claim 1, it is characterized in that: fixed end bearing support outer end assembling flinger ring and spacer, assembling reinforced seal part between flinger ring and spacer, at the outside of reinforced seal part assembling gland, at float step bearing seat outer end assembling flinger ring and spacer, assembling reinforced seal part between flinger ring and spacer is at the outside of reinforced seal part assembling gland.
3, two-stage axial flow fan bearing device according to claim 1 is characterized in that: the longitudinal and transverse gusset of welding on the bearing housing outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102301690A CN101446297A (en) | 2008-12-26 | 2008-12-26 | Two-stage axial flow fan bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102301690A CN101446297A (en) | 2008-12-26 | 2008-12-26 | Two-stage axial flow fan bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101446297A true CN101446297A (en) | 2009-06-03 |
Family
ID=40742115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102301690A Pending CN101446297A (en) | 2008-12-26 | 2008-12-26 | Two-stage axial flow fan bearing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN101446297A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840552A (en) * | 2016-04-12 | 2016-08-10 | 韦海报 | Installation process for grate cooler draught fan bearing base |
| CN107131290A (en) * | 2017-05-12 | 2017-09-05 | 中信重工机械股份有限公司 | A kind of large-sized mining grinding mill little gear rolling supporting structure |
| CN107882754A (en) * | 2017-10-30 | 2018-04-06 | 上海通用风机股份有限公司 | A kind of adjustable oil-lubricated bearing case |
| CN108425860A (en) * | 2018-02-05 | 2018-08-21 | 洛阳北玻台信风机技术有限责任公司 | A kind of transmission component for sweeper special fan |
-
2008
- 2008-12-26 CN CNA2008102301690A patent/CN101446297A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840552A (en) * | 2016-04-12 | 2016-08-10 | 韦海报 | Installation process for grate cooler draught fan bearing base |
| CN107131290A (en) * | 2017-05-12 | 2017-09-05 | 中信重工机械股份有限公司 | A kind of large-sized mining grinding mill little gear rolling supporting structure |
| CN107882754A (en) * | 2017-10-30 | 2018-04-06 | 上海通用风机股份有限公司 | A kind of adjustable oil-lubricated bearing case |
| CN108425860A (en) * | 2018-02-05 | 2018-08-21 | 洛阳北玻台信风机技术有限责任公司 | A kind of transmission component for sweeper special fan |
| CN108425860B (en) * | 2018-02-05 | 2023-12-05 | 洛阳北玻三元流风机技术有限公司 | Transmission assembly for special fan of sweeper |
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Application publication date: 20090603 |