CN102900776A - Bearing device - Google Patents
Bearing device Download PDFInfo
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- CN102900776A CN102900776A CN2012104021188A CN201210402118A CN102900776A CN 102900776 A CN102900776 A CN 102900776A CN 2012104021188 A CN2012104021188 A CN 2012104021188A CN 201210402118 A CN201210402118 A CN 201210402118A CN 102900776 A CN102900776 A CN 102900776A
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- 239000003566 sealing material Substances 0.000 claims abstract description 61
- 230000000694 effects Effects 0.000 abstract description 12
- 238000007789 sealing Methods 0.000 abstract description 10
- 230000008093 supporting effect Effects 0.000 abstract description 5
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000003319 supportive effect Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention provides a bearing device. The bearing device is characterized by comprising a bearing seat coaxially arranged outside a rotation shaft, the bearing seat is formed by sequentially connecting a first smooth section, a second smooth section and a bearing seat threaded section, and the diameters of the first smooth section, the second smooth section and the bearing seat threaded section are increased sequentially; and a sealing material is arranged in the second smooth section, a bolt is connected with the bearing seat threaded section through a locking nut and compacts the sealing material. By the bearing device, the shortcomings in the prior art are overcome, an effect of supporting the rotation shaft which extends out of a door frame is achieved, an effect of sealing a shaft end of a secondary air door of a combustor can be guaranteed, the bearing device is convenient to mount and is quickly and conveniently maintained, dismounted and mounted.
Description
Technical field
The present invention relates to a kind of bearing means, belong to boiler secondary windshield plate drive bearing technical field.
Background technique
In the running of boiler, along with the variation of load need be regulated secondary air flow simultaneously to guarantee the combustion efficiency of boiler, the control pollutant emission.And the adjusting of air quantity to be adjusting by the secondary air register baffle opening realize that can the axle that therefore drives the secondary air damper transmission rotate most important neatly.But, Secondary Air has higher temperature and certain pressure, and carry a certain amount of fly ash granule, if the blow-by of bearing means place or sealing effect are bad, can cause the outer air door place of boiler setting environment abominable, Secondary Air with uniform temperature carries the part fly ash granule and spills by bearing seal inefficacy place, in the thermal insulation layer deposition thermal insulation layer is damaged.In addition, the air door doorframe is furnished with outward and drives the actuator that air door rotates, and fly ash granule may cause actuator to rotate dumb even bite in actuator's deposition.Simultaneously because rotatingshaft has certain distance with the rocking bar joint with doorframe strong point place, in the axle rotation process, can produce certain bending, if crooked conference causes bite even the axle damage of axle.Therefore, the secondary air register bearing means not only will guarantee to the extension split axle supporting, and will guarantee that sealing material reasonably being compacted in the scope, also will guarantee when sealing material lost efficacy, and easily dismounting is keeped in repair.
The bearing means major defect of conventional boiler burner secondary air register is as follows:
(1) adopts and to be threaded the compacting sealing material between built-in double-screw bolt and the sleeve, shortcoming is in installation process because double-screw bolt gos deep into sleeve, can not twist well double-screw bolt, can not guarantee that sealing material reasonably is being compacted in the scope, if sealing material is not compacted, just can not guarantee sealing effect, if the sealing material overvoltage, to such an extent as to then cause sealing material to damage or sealing material locking axle axle can not normal rotation.In addition because that air door rotates is more frequent, sealing material fastening piece (built-in double-screw bolt) can be subject to impact that axle rotates repeatedly occur loosening, thereby sealing material can not be compacted, cause seal failure.
(2) with flange coupling shaft lining and sleeve, to reach sealing effect and to the supporting effect of axle.When sealing material lost efficacy, owing in the end of axle rocker actuator is arranged, and the limited space between rocker actuator and the bearing, if will change sealing material, just necessary dismounting rocker actuator, this brings time and waste economically to maintenance.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of when projecting shaft is played a supporting role, and can guarantee the sealing effect of burner secondary air register axle head, can reach again easily bearing means of maintenance dismounting.
In order to solve the problems of the technologies described above, technological scheme of the present invention provides a kind of bearing means, it is characterized in that: comprise with the bearing support that is located in the rotatingshaft outside, bearing support is connected to form successively by the first smooth section, the second smooth section and bearing support thread section, the first smooth section diameter＜the second smooth section diameter＜bearing support thread section diameter; Sealing material is located in the second smooth section, and bolt is connected with the bearing support thread section and the compacting sealing material by locking nut.
Preferably, described the first smooth section diameter is than the large 2～3mm of rotatingshaft diameter.
Preferably, the large 6～10mm of length of Thickness Ratio second smooth section of described sealing material.
Preferably, described bolt thread Length Ratio bearing support thread section length and the large 10～20mm of locking nut length sum.
When a kind of bearing means provided by the invention uses, bearing sleeve rotatingshaft and is fixed on the secondary air register doorframe, in the second smooth section of bearing support, place sealing material, the bolt of screwing on from the bearing support end, bolt plays a supportive role to stretching out doorframe part rotatingshaft, avoids the excessive bending damage that causes bite or rotatingshaft of amplitude of fluctuation in the rotatingshaft rotation process.Tighten locking nut after tighting a bolt, utilize the reaction force lock bolt between locking nut end face and the bearing support end face, prevent that bolt from because the rotation of rotatingshaft occurs to become flexible, affecting compression quality.
A kind of bearing means provided by the invention has following beneficial effect compared to existing technology:
(1) easy for installation, can guarantee that sealing material reasonably is being compacted in the scope.After bearing support is fixing, bolt was realized with being connected by twisting bolt of bearing support, and bolt is outside at bearing support, general spanner wrench just can be realized tightening, and can control the dynamics of tightening, the thickness of sealing material is slightly larger than the length of the second smooth section according to its compression property, can guarantee that sealing material reasonably is being compacted in the scope, avoid sealing material not to be compacted and cause seal leakage, to such an extent as to avoid simultaneously the sealing material overvoltage to cause sealing material to damage or sealing material locking axle axle can not normal rotation.
(2) the maintenance dismounting is convenient.Because Secondary Air has higher temperature and certain pressure, the operating mode at sealing material place is abominable, after boiler operatiopn a period of time, inevitably can lose efficacy, the bolt total length is less than bearing support end face and rocking bar end face distance, can in the situation of not dismounting rocker actuator, turn on bolt, change sealing material, offer convenience for the maintenance dismounting, time saving and energy saving.
(3) can guarantee that damper shaft sealing material in rotation process is compacted.Because it is more frequent that air door rotates, the sealing material fastening piece can be subject to impact that axle rotates repeatedly occur loosening, thereby sealing material can not be compacted.Adopt locking nut to control fixing bolt, behind bolt tightening, tighten again locking nut, utilize the reaction force lock bolt between locking nut end face and the bearing support end face, prevent that bolt from because the rotation of axle occurs to become flexible, affecting compression quality.
(4) can give the extension rotatingshaft to support.Bolt plays a supportive role to stretching out doorframe part axle, avoids the excessive bending damage that causes bite or axle of amplitude of fluctuation in the rotatingshaft rotation process.
Device provided by the invention has overcome the deficiencies in the prior art, when the extension rotatingshaft is played a supporting role, can guarantee the sealing effect of burner secondary air register axle head, and easy for installation, the maintenance dismounting convenient.
Description of drawings
Fig. 1 is a kind of bearing means schematic representation provided by the invention;
Fig. 2 is present embodiment bottom bracket schematic representation;
Fig. 3 is bolt schematic representation in the present embodiment;
Description of reference numerals
The 1-bearing support; 1-1-the first smooth section; 1-2-the second smooth section; 1-3-bearing support thread section; The 2-sealing material; The 3-bolt; The 4-locking nut; The 5-rocking bar; L1-bolt total length; L2-bearing support end face and rocking bar end face distance; L3-the second smooth section length; L4-bearing support thread section length; L5-locking nut thickness; L6-bolt thread segment length; Φ 1-the first smooth section diameter; Φ 2-the second smooth section diameter; Φ 3-bearing support thread section diameter.
Embodiment
For the present invention is become apparent, hereby with two preferred embodiments, and cooperate accompanying drawing to be described in detail below.
Fig. 1 is a kind of bearing means schematic representation provided by the invention, described a kind of bearing means comprises bearing support 1, bearing support 1 coaxial sleeve is outside at rotatingshaft, and in conjunction with Fig. 2, bearing support 1 is connected to form successively by the first smooth section 1-1, the second smooth section 1-2 and bearing support thread section 1-3.The diameter of phi 1 of the first smooth section 1-1 is slightly larger than the rotatingshaft diameter, the first smooth section 1-1 diameter of phi 1＜the second smooth section 1-2 diameter of phi 2＜bearing support thread section 1-3 diameter of phi 3.Place sealing material 2 in the second smooth section 1-2, bolt 3 is contained on the bearing support 1 and with bearing support thread section 1-3 by locking nut 4 and is connected.Locking nut 4 is contained between bolt 3 and bearing support 1 end face, it is fastening to impel bolt 3 to be connected with the bearing support thread section 1-3 of bearing support 1 by locking nut 4 end faces and the active force of bearing support 1 end face, and locking nut 4 will have the reliability of enough thickness to guarantee to connect.After bearing support 1 installs, put into sealing material 2, with bolt 3 with sealing material 2 compactings after, with locking nut 4 that bolt 3 is fixing, loosening to guarantee rotatingshaft bolt 3 in rotation process.
The first smooth section 1-1 diameter is than the large 2～3mm of rotatingshaft diameter, to guarantee the normal rotation of rotatingshaft, is unlikely to again to leave larger space and allows the working medium that is in bad working environments pass through, reduce and the contacting of sealing material 2, thus the working life of composite enhancement 2.
The second smooth section 1-2 diameter of phi 2 can be according to different change of the different or required sealing effect that reaches of bearing means working environment with length L 3, to guarantee sealing effect, but the second smooth section 1-2 diameter of phi 2 is greater than the first smooth section 1-1 diameter of phi 1, so that sealing material 2 one ends are positioned, as the basic point of sealing material 2 compactings.
Bearing support thread section 1-3 is used for being connected with compacting sealing material 2 with bolt 3, because sealing material 2 need to be put into from bearing support thread section 1-3, when avoiding sealing material 2 to put into and thread collide, make thread or sealing material 2 infringements, to guarantee the integrity of screw thread and sealing material 2, the diameter of phi 3 of bearing support thread section 1-3 must be greater than the diameter of phi 2 of the second smooth section 1-2.
The thickness of sealing material 2 is slightly larger than the length L 3 of the second smooth section 1-2 according to its compression property, when bolt 3 is screwed in assurance, sealing material 2 reasonably is being compacted in the scope, avoid compressing the unreal leakage that causes, to such an extent as to overvoltage causes sealing material 2 to damage or sealing material 2 locking rotatingshaft rotatingshafts can not normal rotation.
In conjunction with Fig. 3, bolt 3 thread sections and bearing support thread section 1-3 and locking nut 4 are connected.Bolt 3 thread section length L 6 are than bearing support thread section 1-3 length L 4 and the large 10～20mm of locking nut 4 length L, 5 sums, to guarantee that sealing material 2 can be by reasonably compacting and locking nut 4 can play the effect of being locked to bolt 3.In addition, bolt 3 total length L 1 are less than bearing support 1 end face and rocking bar 5 end face distance L2, and are to guarantee can to change sealing material 2 in the situation of not dismounting actuator after sealing material 2 lost efficacy, time saving and energy saving.
During use, bearing support 1 is overlapping rotatingshaft and is being fixed on the secondary air register doorframe, in the second smooth section 1-2 of bearing support 1, place sealing material 2, the bolt 3 of screwing on from the bearing support end, 3 pairs on bolt stretches out doorframe part rotatingshaft and plays a supportive role, and avoids the excessive bending damage that causes bite or rotatingshaft of amplitude of fluctuation in the rotatingshaft rotation process.Tight a bolt and tighten locking nut 4 after 3, utilize the reaction force lock bolt 3 between locking nut 4 end faces and bearing support 1 end face, prevent that bolt 3 from occuring looseningly because of the rotation of rotatingshaft, affects compression quality.
L1＝48mm，L2＝58mm，L3＝30mm，L4＝23mm，L5＝10mm，L6＝35mm。
The bearing means of this kind specification generally is used in secondary air temperature t=310 ℃, in the situation of secondary wind pressure P=2000Pa, consider that pressure and temperature are on the impact of sealing material 2 performances, for guaranteeing that sealing material 2 did not lose efficacy, thickness after sealing material 2 compressions is 30mm, consider the compression property of this temperature lower seal material, the original depth of sealing material is taken as 36～38mm.Can guarantee sealing effect, guarantee simultaneously the convenience of dismounting.
L1＝50mm，L2＝60mm，L3＝37mm，L4＝25mm，L5＝10mm，L6＝37mm。
The bearing means of this kind specification generally is used in secondary air temperature t=370 ℃, in the situation of secondary wind pressure P=2500Pa, consider that pressure and temperature are on the impact of sealing material 2 performances, temperature and pressure is higher, for guaranteeing that sealing material 2 did not lose efficacy, thickness after the sealing material compression increases to 37mm, considers the compression property of this temperature lower seal material, and the original depth of sealing material is taken as 44～47mm.Can guarantee sealing effect, guarantee simultaneously the convenience of dismounting.
Claims (4)
1. bearing means, it is characterized in that: comprise with the bearing support (1) that is located in the rotatingshaft outside, bearing support (1) is connected to form successively by the first smooth section (1-1), the second smooth section (1-2) and bearing support thread section (1-3), the first smooth section (1-1) diameter (Φ 1)＜the second smooth section (1-2) diameter (Φ 2)＜bearing support thread section (1-3) diameter (Φ 3); Sealing material (2) is located in the second smooth section (1-2), and bolt (3) is connected with bearing support thread section (1-3) and compacting sealing material (2) by locking nut (4).
2. a kind of bearing means as claimed in claim 1, it is characterized in that: described the first smooth section (1-1) diameter (Φ 1) is than the large 2～3mm of rotatingshaft diameter.
3. a kind of bearing means as claimed in claim 1 is characterized in that: the large 6～10mm of length (L3) of Thickness Ratio second smooth section (1-2) of described sealing material (2).
4. a kind of bearing means as claimed in claim 1 is characterized in that: described bolt (3) thread section length (L6) is than bearing support thread section (1-3) length (L4) and the large 10～20mm of locking nut (4) length (L5) sum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210402118.8A CN102900776B (en) | 2012-10-19 | 2012-10-19 | A kind of bearing means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210402118.8A CN102900776B (en) | 2012-10-19 | 2012-10-19 | A kind of bearing means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102900776A true CN102900776A (en) | 2013-01-30 |
| CN102900776B CN102900776B (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210402118.8A Active CN102900776B (en) | 2012-10-19 | 2012-10-19 | A kind of bearing means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102900776B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63227496A (en) * | 1987-03-14 | 1988-09-21 | Takashi Kitagawa | Water leakage prevention structure for screw shaft outer casing and inboard boundary portion |
| CN200982355Y (en) * | 2006-12-05 | 2007-11-28 | 李颖仲 | Bush type active and static pressure bearing rolling unloading transmission shaft |
| CN201166120Y (en) * | 2008-02-13 | 2008-12-17 | 江苏华阳科技开发有限公司 | Self-compacting stern shaft stuffing seal |
| CN102022540A (en) * | 2009-09-18 | 2011-04-20 | 上海冠龙阀门机械有限公司 | Floating shaft lever sealing structure |
| CN202326174U (en) * | 2011-12-01 | 2012-07-11 | 重庆水泵厂有限责任公司 | Leak-tightness stuffing box sealing structure and washing system thereof |
| CN202468997U (en) * | 2012-02-16 | 2012-10-03 | 四川川润动力设备有限公司 | Seal sleeve used for mechanical vibrating and deashing device of exhaust heat boiler |
-
2012
- 2012-10-19 CN CN201210402118.8A patent/CN102900776B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63227496A (en) * | 1987-03-14 | 1988-09-21 | Takashi Kitagawa | Water leakage prevention structure for screw shaft outer casing and inboard boundary portion |
| CN200982355Y (en) * | 2006-12-05 | 2007-11-28 | 李颖仲 | Bush type active and static pressure bearing rolling unloading transmission shaft |
| CN201166120Y (en) * | 2008-02-13 | 2008-12-17 | 江苏华阳科技开发有限公司 | Self-compacting stern shaft stuffing seal |
| CN102022540A (en) * | 2009-09-18 | 2011-04-20 | 上海冠龙阀门机械有限公司 | Floating shaft lever sealing structure |
| CN202326174U (en) * | 2011-12-01 | 2012-07-11 | 重庆水泵厂有限责任公司 | Leak-tightness stuffing box sealing structure and washing system thereof |
| CN202468997U (en) * | 2012-02-16 | 2012-10-03 | 四川川润动力设备有限公司 | Seal sleeve used for mechanical vibrating and deashing device of exhaust heat boiler |
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| Publication number | Publication date |
|---|---|
| CN102900776B (en) | 2015-08-19 |
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