CN103969687A - Steam turbine generator unit steam seal rub-impact on-line monitoring device - Google Patents
Steam turbine generator unit steam seal rub-impact on-line monitoring device Download PDFInfo
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- CN103969687A CN103969687A CN201410209621.0A CN201410209621A CN103969687A CN 103969687 A CN103969687 A CN 103969687A CN 201410209621 A CN201410209621 A CN 201410209621A CN 103969687 A CN103969687 A CN 103969687A
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- impact
- steam
- packing
- rub
- turbine generator
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Abstract
The invention discloses a steam turbine generator unit steam seal rub-impact on-line monitoring device. The steam turbine generator unit steam seal rub-impact on-line monitoring device comprises a sheet-shaped arc steam seal (2) with the H-shaped cross section, and the cross section of the steam seal (2) is matched with the cross section of an arc groove of an inner cavity of a steam turbine generator unit air cylinder (1) to be detected in size. The upper bottom face, facing the arc groove of the inner cavity of the air cylinder (1), of the steam seal (2) is provided with a plate spring (3). A strain gage (4) provided with a signal wire (5) is pasted to the plate spring (3). Compared with the prior art, the steam turbine generator unit steam seal rub-impact on-line monitoring device has the advantages that firstly, the rub-impact monitoring device can be installed at the important steam seal position according to actual requirements, and therefore the steam seal rub-impact fault of a steam turbine generator unit can be monitored conveniently in real time on line; secondly, early warning and later positioning can be achieved, the steam seal rub-impact slight and serious position can be accurately determined, and the fault processing blindness is avoided; thirdly, the device is simple in structure and easy to install and adjust.
Description
Technical field
The invention belongs to turbodynamo technical field, relate to a kind of Turbo-generator Set packing and touch the on-Line Monitor Device of rubbing.
Background technology
For reducing dynamic and static gap steam leakage in turbodynamo, its position, gap need install sealing gland additional.And in order to improve the work efficiency of turbodynamo, it is very narrow that the gap design between packing and rotor obtains, so increased the possibility that rubbing fault occurs.This not only can cause excessive vibration, also threatens the safe operation of whole unit.And touching for a long time rubs can increase labyrinth clearance on the one hand, also can cause rotor thermal bending on the other hand, further expands rotor amplitude.When serious, cause rotor permanent bending or fracture.So packing is touched to rub and carries out on-line monitoring to avoid accident generation very necessary.Yet traditional packing touches the vibration that the monitoring means of rubbing rests on indirect monitoring bearing shell or rotor to be inferred always, or rub by listening excellent sound detecting to infer whether to occur packing to touch.Rely on getting sth into one's head of field service personnel, so poor reliability, cannot determine that packing touches the particular location that rubs and occur, and also just cannot take measure targetedly.
Summary of the invention
The technical problem to be solved in the present invention is, the defect existing for prior art, provides a kind of Turbo-generator Set packing to touch the on-Line Monitor Device of rubbing, and uses this device can accurately judge whether packing touches to rub and judge and touches the intensity of rubbing.
Technical solution of the present invention is, the Turbo-generator Set packing providing touches the on-Line Monitor Device of rubbing, referring to accompanying drawing 1～2, have the sheet arc packing 2 that its cross section is " work " font, these packing 2 cross-sectional sizes are mated with the cross-sectional sizes of Turbo-generator Set cylinder 1 inner chamber arc groove to be measured.Described packing 2 is provided with a leaf spring 3 on the upper bottom surface of described cylinder 1 inner chamber arc groove.This leaf spring 3 has two effects, and the one, packing 2 can be fitted in the groove of cylinder 1 securely, unlikely generation is loosening; The 2nd, when the rotor of turbogenerator set coordinating with it when packing 2 touches, make the packing 2 can radial yield and have resilience space and be protected.On this leaf spring 3, be pasted with a slice with the foil gauge 4 of signal conductor 5.When being used, the signal conductor 5 of described foil gauge 4 stretches out Turbo-generator Set to be measured through described cylinder 1 inner chamber arc groove external, to described foil gauge 4 is passed to Turbo-generator Set measuring terminals to be measured because touching the piezoelectric effect voltage producing that rubs, by monitor this voltage judge Turbo-generator Set to be measured whether occur rubbing and there is the intensity of rubbing of touching of rubbing.
Principle of work of the present invention is, the leaf spring middle part that the Turbo-generator Set packing proposing in the present invention touches the on-Line Monitor Device of rubbing arranges the foil gauge that high temperature resistant piezoelectric crystal plate makes of drawing materials, and the signal of this foil gauge is led to measurement mechanism by wire.Shown in Fig. 1～4, this device as the above-mentioned high temperature resistant foil gauge 4 that includes leaf spring 3 and be attached at leaf spring 3 back sides, foil gauge 4 arranges two high temperature resistant wires 5, for the voltage variety that foil gauge 4 is produced, transfers to measurement mechanism.Leaf spring 3 is installed on cylinder 1 for installing in the dovetail groove of packing 2, and during normal condition, this leaf spring 3 is because the elastic force that Bending Deformation produces is closely fixed on packing 2 in the dovetail groove on cylinder 1.And touch while rubbing when packing 2 and rotor 6 produce, produce impulsive force F touching the contact point that rubs
i, power F
iby packing 2, be delivered on packing 2 back side leaf springs 3, thereby produce flexural deformation.Power F
ifinally cause leaf spring flexural deformation, this distortion causes foil gauge 4 stretcher strains on leaf spring, as shown in Figure 4, makes the length of foil gauge 4 from h
0be stretched to h
1thereby, on foil gauge 4, produce piezoelectric effect, generate the voltage changing.This voltage is drawn cylinder by wire 5, then by measurement mechanism, monitors this voltage variety and just can finally monitor packing and touch the fault of rubbing.
The invention has the beneficial effects as follows, compared with prior art,
1), from then on take leave of poor reliability, uncertain high, by monitoring axle, shake, watt shake or on-the-spotly listen excellent audition to judge whether packing touches the traditional approach rubbing, and can in important packing position installing, touch the monitoring device that rubs according to actual needs, to facilitate the packing of real time on-line monitoring Turbo-generator Set to touch to rub fault;
2), for Turbo-generator Set generation multiposition packing, touch the situation of rubbing, can early warning, later stage location.Precisely determine that packing touches the weight position of rubbing, and using this as judging that on-the-spot packing touches the foundation that the fault of rubbing is disposed priority level, avoids the blindness of fault handling;
3), this apparatus structure is simple, is easy to Installation and Debugging.
Accompanying drawing explanation
Fig. 1 is the structural representation that Turbo-generator Set packing of the present invention touches the specific embodiment of on-Line Monitor Device that rubs;
Fig. 2 be the packing of Turbo-generator Set shown in Fig. 1 touch the on-Line Monitor Device of rubbing A-A to cut-open view;
Fig. 3 is that the packing of Turbo-generator Set shown in Fig. 1～2 touches the on-Line Monitor Device of rubbing and at packing, is subject to touching rubbing and makes the state reference map of used time leaf spring distortion;
Fig. 4 is that the packing of Turbo-generator Set shown in Fig. 1～2 touches the on-Line Monitor Device of rubbing and at packing, is subject to touching rubbing and makes the state reference map that used time foil gauge is out of shape with leaf spring.
Being denoted as in above Fig. 1～4:
1-cylinder,
2-packing,
3-leaf spring,
4-foil gauge,
5-signal conductor,
6-rotor.
Embodiment
Referring to accompanying drawing 1～2, shown in accompanying drawing 1～2, Turbo-generator Set packing of the present invention touches this embodiment of the on-Line Monitor Device of rubbing, the commercially available 15CrMo type alloy steel cutting of drawing materials of its packing 2 forms the sheet arc that cross section is " work " font, and its size is mated with the cross-sectional sizes of Turbo-generator Set cylinder 1 inner chamber arc groove to be measured.Leaf spring 3 adopts commercially available general high chromium spring steel material leaf spring, is arranged on packing 2 on the upper bottom surface of cylinder 1 inner chamber arc groove.Foil gauge 4 is commercially available common high temperature resistant foil gauge, is mounted on leaf spring 3, and one end of foil gauge 4 connects a signal conductor 5, and this signal conductor 5 adopts commercially available all-purpose fire resistant signal conductor.
By the Turbo-generator Set packing of the present invention forming above, touch the on-Line Monitor Device of rubbing and on probation be proved to be packing to touch the monitoring effect of the fault of rubbing good through manufacturing experimently, reach designing requirement completely.
Claims (1)
1. a Turbo-generator Set packing touches the on-Line Monitor Device of rubbing, it is characterized in that, it has the sheet arc packing (2) that its cross section is " work " font, this packing (2) cross-sectional sizes is mated with the cross-sectional sizes of Turbo-generator Set cylinder to be measured (1) inner chamber arc groove, described packing (2) is provided with a leaf spring (3) on the upper bottom surface of described cylinder (1) inner chamber arc groove, is pasted with a foil gauge with signal conductor (5) (4) on described leaf spring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209621.0A CN103969687A (en) | 2014-05-19 | 2014-05-19 | Steam turbine generator unit steam seal rub-impact on-line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209621.0A CN103969687A (en) | 2014-05-19 | 2014-05-19 | Steam turbine generator unit steam seal rub-impact on-line monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103969687A true CN103969687A (en) | 2014-08-06 |
Family
ID=51239411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410209621.0A Pending CN103969687A (en) | 2014-05-19 | 2014-05-19 | Steam turbine generator unit steam seal rub-impact on-line monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103969687A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314624A (en) * | 2014-08-20 | 2015-01-28 | 东方电气集团东方汽轮机有限公司 | Device and method for monitoring center change of air cylinder in process of covering cylinder of steam turbine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2376536Y (en) * | 1999-05-13 | 2000-05-03 | 赵宗春 | Labyrinth gland sealing device capable of automatic regulating radial clearance |
| US20010007384A1 (en) * | 1992-11-19 | 2001-07-12 | General Electric Company | Combined brush seal and labyrinth seal segment for rotary machines |
| JP2001280602A (en) * | 2000-03-30 | 2001-10-10 | Mitsubishi Heavy Ind Ltd | Feed water heater |
| CN201159090Y (en) * | 2008-02-22 | 2008-12-03 | 王胜五 | Reversible contact gland seal |
| CN203430577U (en) * | 2013-08-20 | 2014-02-12 | 东方电气集团东方汽轮机有限公司 | Steam sealing structure |
| CN203825209U (en) * | 2014-05-19 | 2014-09-10 | 国家电网公司 | Online monitoring device for vapor seal rubbing for a group of steam turbine generators |
-
2014
- 2014-05-19 CN CN201410209621.0A patent/CN103969687A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010007384A1 (en) * | 1992-11-19 | 2001-07-12 | General Electric Company | Combined brush seal and labyrinth seal segment for rotary machines |
| CN2376536Y (en) * | 1999-05-13 | 2000-05-03 | 赵宗春 | Labyrinth gland sealing device capable of automatic regulating radial clearance |
| JP2001280602A (en) * | 2000-03-30 | 2001-10-10 | Mitsubishi Heavy Ind Ltd | Feed water heater |
| CN201159090Y (en) * | 2008-02-22 | 2008-12-03 | 王胜五 | Reversible contact gland seal |
| CN203430577U (en) * | 2013-08-20 | 2014-02-12 | 东方电气集团东方汽轮机有限公司 | Steam sealing structure |
| CN203825209U (en) * | 2014-05-19 | 2014-09-10 | 国家电网公司 | Online monitoring device for vapor seal rubbing for a group of steam turbine generators |
Non-Patent Citations (1)
| Title |
|---|
| 黄昭毅: "一组状态监测及诊断成果鉴定", 《中国设备管理》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314624A (en) * | 2014-08-20 | 2015-01-28 | 东方电气集团东方汽轮机有限公司 | Device and method for monitoring center change of air cylinder in process of covering cylinder of steam turbine |
| CN104314624B (en) * | 2014-08-20 | 2016-03-23 | 东方电气集团东方汽轮机有限公司 | A kind of device and method of steamer cover cylinder process monitoring central cylindrical change |
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| PB01 | Publication | ||
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Application publication date: 20140806 |