CN204225930U - A kind of friction of passive modulation internode gap starts turbine steam seal labyrinth strip - Google Patents
A kind of friction of passive modulation internode gap starts turbine steam seal labyrinth strip Download PDFInfo
- Publication number
- CN204225930U CN204225930U CN201420720857.6U CN201420720857U CN204225930U CN 204225930 U CN204225930 U CN 204225930U CN 201420720857 U CN201420720857 U CN 201420720857U CN 204225930 U CN204225930 U CN 204225930U
- Authority
- CN
- China
- Prior art keywords
- ring
- ring plate
- labyrinth strip
- anchor
- anchor ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The friction of passive modulation internode gap starts a turbine steam seal labyrinth strip, and it relates to a kind of for the labyrinth strip starting turbine rotor shaft neck packing and leaf top girth band packing that rubs.To solve in the steam turbine Start-up and operating performance stage, labyrinth clearance is excessive, cause quality of steam, flow loss is large, and when this gap artificially arranges the improper problem causing labyrinth strip to damage leaf top girth band or rotor journal, second ring plate, transition ring plate and first ring sheet ring set affixed, described labyrinth strip is Martensitic Stain Less Steel labyrinth strip, the madial wall place of second ring plate corresponding with described labyrinth strip opposite side anchor ring offers chamfering, the anchor ring of second ring plate corresponding with described labyrinth strip opposite side anchor ring, the anchor ring of transition ring plate and the anchor ring of the first ring plate are the anchor ring of Vickers hardness at 150HV to 175HV.The utility model is used for the high temperature and high pressure gas sealing to leaf top girth band or rotor journal.
Description
Technical field
The utility model relates to a kind of for the labyrinth strip starting turbine rotor shaft neck packing and leaf top girth band packing that rubs.
Background technique
Steam turbine, for preventing gas leakage, reduces hear rate, realizes the high temperature and high pressure gas sealing to leaf top girth band and rotor journal mainly through labyrinth strip.In prior art, 300MW Subcritical Units is to the traditional comb-shaped structure of the many employings of gland seal structure of 1000MW supercritical unit, in this structure, labyrinth strip is all vertically arranged, and several labyrinth strips horizontal arrangement successively, as shown in Figures 2 and 3, for ensureing steam-turbine unit safe starting, reducing the risk that labyrinth strip rubs with shroud or rotor journal, all there is the gap of 0.5mm to 0.75mm in sealing station.Along with steam-turbine unit constantly improves renewal and the improving constantly of unit parameter, the quality of steam of being lost by this labyrinth clearance, flow are increased gradually, and not only hear rate increases, and cause inter-stage sprue flow perturbation, affect unit efficiency.
At present, solve the quality of steam of this labyrinth clearance loss, the method for flow mainly contains two kinds: a kind of is fixed packing, is mainly used in leaf top girth band; Another kind is adjustable steam seal, is mainly used in rotor journal position, and typical packing is designed to the automatically closed packing of a kind of patent No. 96106529.X, and these two kinds of solutions all solve by increasing the labyrinth strip number of turns, as far as possible reduction gap.And these two kinds of packings labyrinth strip used does not allow to rub with solid of rotation (leaf top girth band and rotor journal).But this gap for people be adjusting play, although this gap has been transferred to minimum, but the quality of steam of being lost by this labyrinth clearance, flow are still more, and this gap adjusts improper meeting produces to rub with leaf top girth band or rotor journal and cause the wearing and tearing of leaf top girth band or rotor journal.
Model utility content
The friction that the purpose of this utility model is to provide a kind of passive modulation internode gap starts turbine steam seal labyrinth strip, to solve in the steam turbine Start-up and operating performance stage, labyrinth clearance is excessive, cause quality of steam, flow loss large, and when this gap artificially arranges the improper problem causing labyrinth strip to damage leaf top girth band or rotor journal.
The utility model is the technological scheme taked that solves the problem: described labyrinth strip is circular ring plate, described labyrinth strip is by the first ring plate, second ring plate and transition ring plate composition, first ring plate diameter is greater than the second ring plate diameter, second ring plate, vertical loop sleeve is affixed successively for transition ring plate and the first ring plate, first ring plate thickness is greater than the second ring plate thickness, transition ring plate inner ring thickness and the second ring plate consistency of thickness, transition ring plate outer ring thickness and the first ring plate consistency of thickness, described labyrinth strip is Martensitic Stain Less Steel labyrinth strip, described labyrinth strip one side ring surface is vertical plane, the madial wall place of second ring plate corresponding with described labyrinth strip opposite side anchor ring offers chamfering, the anchor ring of second ring plate corresponding with described labyrinth strip opposite side anchor ring, the anchor ring of transition ring plate and the anchor ring of the first ring plate are the anchor ring of Vickers hardness at 150HV to 175HV.
The utility model compared with prior art has following beneficial effect:
1, labyrinth strip of the present utility model is effective to gap regudation of steam sealing.The people of hinge structure is the mode of adjusting play, and labyrinth strip of the present utility model is the labyrinth strip that passive type regulates labyrinth clearance, after labyrinth strip 05 of the present utility model is installed, the anchor ring of second ring plate 02 corresponding with opposite side anchor ring described in the utility model labyrinth strip 05 is through the anchor ring of cold rolling shaping Vickers hardness at 150HV to 175HV, when starting steam turbine, air current flow direction is perpendicular with labyrinth strip 05 of the present utility model, labyrinth strip 05 of the present utility model makes air current flow direction produce stronger turbulent flow, the inner ring of the second ring plate 02 is at vent flow turbulent flow, in effective contact friction process of rotor expansion and rotor journal 06 or leaf top girth band 07, " J " type crimping can be bent to, thus formation labyrinth clearance, because this labyrinth clearance is extruded formation by rotor journal 06 or leaf top girth band 07, when this labyrinth clearance can ensure steam turbine stable operation, rotor journal 06 or leaf top girth band 07 do not contact with labyrinth strip, guarantee unit safety operation, can effectively reduce this labyrinth clearance again, thus effectively reduce quality of steam, the loss of flow.
2, because the second ring plate 02 inwall is provided with chamfering 04, therefore not easily cause wearing and tearing in rotor journal 06 or leaf top girth band 07 process that labyrinth strip 05 of the present utility model is extruded or scratch, chamfering is conducive to labyrinth strip in friction process, forms " J " type crimping, the chamfering 04 of the second ring plate 02 is 45 ° of chamferings, 45 ° of chamferings are conventional chamfering in machining, are convenient to manufacture.
3, the labyrinth strip structure of modification of labyrinth strip 05 hinge structure of the present utility model is little, reduces manufacture cost.Because in prior art, the manufacturing process of labyrinth strip is huge and complicated, if excessive to the architecture advances of labyrinth strip, Important Adjustment is carried out by causing the whole manufacturing process of labyrinth strip, the cost of this adjustment is very expensive, and labyrinth strip 05 of the present utility model improves little, improvements are: the madial wall place of second ring plate 02 corresponding with labyrinth strip 05 opposite side anchor ring offers chamfering 04, the anchor ring of second ring plate 02 corresponding with opposite side anchor ring described in labyrinth strip 05, the anchor ring of transition ring plate 03 and the anchor ring of the first ring plate 01 are through the anchor ring of cold rolling shaping vickers hardness hv at 150HV to 175HV.Thus achieve can either effectively reduce labyrinth clearance excessive cause quality of steam, flow loss, can ensure that again rotor journal and leaf top girth band do not cause damage.Because the adjustment of labyrinth strip manufacturing process is little, be conducive to transforming on original packing, reduce packing manufacturing process Setup Cost, be highly suitable on retrofitted unit and use.
After using labyrinth strip of the present utility model, the quality of steam of being lost by this labyrinth clearance, flow hinge structure reduce by 40%.
Accompanying drawing explanation
Fig. 1 is the sectional plan view of labyrinth strip of the present utility model, Fig. 2 uses labyrinth strip 05 of the present utility model to form the broken section plan view that comb-shaped structure packing matches with rotor journal 06, and Fig. 3 is the broken section plan view that use labyrinth strip 05 of the present utility model forms comb-shaped structure packing and matches with leaf top girth band 07.In Fig. 2 to Fig. 3,05 is labyrinth strip of the present utility model, and 06 is rotor journal, and 07 is leaf top girth band, and arrow all refers to air current flow direction and rotor axial expansion direction.
Embodiment
Embodiment one: composition graphs 1 to Fig. 3 illustrates, the described labyrinth strip of present embodiment is circular ring plate, described labyrinth strip is by the first ring plate 01, second ring plate 02 and transition ring plate 03 form, first ring plate 01 diameter is greater than the second ring plate 02 diameter, second ring plate 02, vertical loop sleeve is affixed successively for transition ring plate 03 and the first ring plate 01, first ring plate 01 thickness is greater than the second ring plate 02 thickness, transition ring plate 03 inner ring thickness and the second ring plate 02 consistency of thickness, transition ring plate 03 outer ring thickness and the first ring plate 01 consistency of thickness, described labyrinth strip is Martensitic Stain Less Steel labyrinth strip, described labyrinth strip one side ring surface is vertical plane, the madial wall place of second ring plate 02 corresponding with described labyrinth strip opposite side anchor ring offers chamfering 04, the anchor ring of second ring plate 02 corresponding with described labyrinth strip opposite side anchor ring, the anchor ring of transition ring plate 03 and the anchor ring of the first ring plate 01 are the anchor ring of Vickers hardness at 150HV to 175HV.
Embodiment two: composition graphs 1 to Fig. 3 illustrates, the anchor ring of the anchor ring of second ring plate 02, the anchor ring of transition ring plate 03 and first ring plate 01 corresponding with opposite side anchor ring described in labyrinth strip of present embodiment is cold rolling shaping anchor ring.
In present embodiment, undocumented technical characteristics is identical with embodiment one.
Embodiment three: composition graphs 1 to Fig. 3 illustrates, the chamfering 04 of the second ring plate 02 of present embodiment is 45 ° of chamferings.45 ° of chamferings are conventional chamfering in machining, are convenient to manufacture.
In present embodiment, undocumented technical characteristics is identical with embodiment one or two.
Working principle
See Fig. 2 and Fig. 3 explanation, after labyrinth strip 05 of the present utility model is installed, the anchor ring of second ring plate 02 corresponding with opposite side anchor ring described in the utility model labyrinth strip 05 is through the anchor ring of cold rolling shaping Vickers hardness at 150HV to 175HV, when steam turbine initiating switchup runs, labyrinth strip 05 vertical plane side of the present utility model is vertical with air current flow direction, produce stronger turbulent flow, the inner ring of the second ring plate 02 is in effective contact friction process of same rotor journal 06 or leaf top girth band 07, " J " type crimping can be bent to, thus formation labyrinth clearance, because this labyrinth clearance is extruded formation by rotor journal 06 or leaf top girth band 07, when this labyrinth clearance can ensure steam turbine stable operation, rotor journal 06 or leaf top girth band 07 do not contact with labyrinth strip, guarantee unit safety operation, can effectively reduce this labyrinth clearance again, thus effectively reduce quality of steam, the loss of flow.
Claims (3)
1. the friction of a passive modulation internode gap starts turbine steam seal labyrinth strip, described labyrinth strip is circular ring plate, described labyrinth strip is by the first ring plate (01), second ring plate (02) and transition ring plate (03) composition, first ring plate (01) diameter is greater than the second ring plate (02) diameter, second ring plate (02), vertical loop sleeve is affixed successively with the first ring plate (01) for transition ring plate (03), first ring plate (01) thickness is greater than the second ring plate (02) thickness, transition ring plate (03) inner ring thickness and the second ring plate (02) consistency of thickness, transition ring plate (03) outer ring thickness and the first ring plate (01) consistency of thickness, it is characterized in that: described labyrinth strip is Martensitic Stain Less Steel labyrinth strip, described labyrinth strip one side ring surface is vertical plane, the madial wall place of second ring plate (02) corresponding with described labyrinth strip opposite side anchor ring offers chamfering (04), the anchor ring of second ring plate (02) corresponding with described labyrinth strip opposite side anchor ring, the anchor ring of transition ring plate (03) and the anchor ring of the first ring plate (01) are the anchor ring of Vickers hardness at 150HV to 175HV.
2. labyrinth strip according to claim 1, is characterized in that: the anchor ring of the anchor ring of second ring plate (02) corresponding with described labyrinth strip opposite side anchor ring, the anchor ring of transition ring plate (03) and the first ring plate (01) is cold rolling shaping anchor ring.
3. labyrinth strip according to claim 1 and 2, is characterized in that: the chamfering (04) of the second ring plate (02) is 45 ° of chamferings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420720857.6U CN204225930U (en) | 2014-11-26 | 2014-11-26 | A kind of friction of passive modulation internode gap starts turbine steam seal labyrinth strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420720857.6U CN204225930U (en) | 2014-11-26 | 2014-11-26 | A kind of friction of passive modulation internode gap starts turbine steam seal labyrinth strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204225930U true CN204225930U (en) | 2015-03-25 |
Family
ID=52924038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420720857.6U Withdrawn - After Issue CN204225930U (en) | 2014-11-26 | 2014-11-26 | A kind of friction of passive modulation internode gap starts turbine steam seal labyrinth strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204225930U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481596A (en) * | 2014-11-26 | 2015-04-01 | 哈尔滨汽轮机厂有限责任公司 | Sealing strip for passive gap adjusting friction starting steam turbine sealing |
-
2014
- 2014-11-26 CN CN201420720857.6U patent/CN204225930U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481596A (en) * | 2014-11-26 | 2015-04-01 | 哈尔滨汽轮机厂有限责任公司 | Sealing strip for passive gap adjusting friction starting steam turbine sealing |
| CN104481596B (en) * | 2014-11-26 | 2016-02-10 | 哈尔滨汽轮机厂有限责任公司 | A kind of friction of passive modulation internode gap starts turbine steam seal labyrinth strip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204225930U (en) | A kind of friction of passive modulation internode gap starts turbine steam seal labyrinth strip | |
| CN204239765U (en) | A kind of labyrinth seal structure | |
| CN104481596B (en) | A kind of friction of passive modulation internode gap starts turbine steam seal labyrinth strip | |
| CN103335761B (en) | The appraisal procedure that level sound seal leakage that steam turbine is through-flow is lost steam turbine power | |
| CN204511525U (en) | A kind of novel 600MW level steam turbine nozzle sets | |
| CN203725492U (en) | Rough-intermediate rolling roller mechanism | |
| CN102974990B (en) | Processing method for rotor profile structure of dual-screw compressor | |
| CN203742672U (en) | Cooling structure of medium-pressure rotor | |
| CN103470774B (en) | A kind of stepped shaft labyrinth seal | |
| CN203737712U (en) | Roller device for roughing and intermediate rolling | |
| CN204852350U (en) | Novel oil blanket structure | |
| CN203374547U (en) | Single-blade hydraulic pressure self-servo swinging cylinder | |
| CN212406814U (en) | Novel micro-gap steam seal based on adjustable Brayton structure | |
| CN203783645U (en) | Steam seal ring connecting structure | |
| CN204851335U (en) | Integration impeller | |
| CN204357501U (en) | Stator mounting structure and there is its nozzle ring | |
| CN203500485U (en) | Inclined hole honeycomb seal | |
| CN207568660U (en) | A kind of intensive toe joint touch packing | |
| CN2639528Y (en) | Bearing box oil seal of steam turbine generator | |
| CN207315450U (en) | Supercritical carbon dioxide turbine step wheel disc | |
| CN202381702U (en) | Labyrinth seal | |
| CN204941621U (en) | A kind of heat insulation turbosupercharger | |
| CN209277952U (en) | A kind of ultra supercritical coal-fired unit high-pressure shaft blockades vapour device | |
| CN203585340U (en) | Eddy seal structure | |
| CN204083253U (en) | Seal structure of turbocharger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150325 Effective date of abandoning: 20160210 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |