CN103939260A - Compensation type guide vane end face sealing device - Google Patents
Compensation type guide vane end face sealing device Download PDFInfo
- Publication number
- CN103939260A CN103939260A CN201410186678.3A CN201410186678A CN103939260A CN 103939260 A CN103939260 A CN 103939260A CN 201410186678 A CN201410186678 A CN 201410186678A CN 103939260 A CN103939260 A CN 103939260A
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- CN
- China
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- pressing plate
- end surface
- circular groove
- top cover
- guide vane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention provides a compensation type guide vane end face sealing device. The compensation type guide vane end face sealing device comprises a bottom ring, a top cover, a guide vane, a first pressing plate and a second pressing plate. The bottom ring and the top cover are respectively provided with an annular groove, the guide vane is arranged between the bottom ring and the top cover and hinged to the portion between the bottom ring and the top cover, the first pressing plate and the second pressing plate are arranged in the annular grooves respectively, and the first pressing plate and the second pressing plate are fixedly connected through a thread pair. The compensation type guide vane end face sealing device is characterized by further comprising an upper end face sealing device and a lower end face sealing device, the upper end face sealing device is arranged in the annular groove of the top cover and fixedly connected with the annular groove of the top cover through the first pressing plate and the second pressing plate, the overflow face of the upper end face sealing device makes contact with the upper end face of the guide vane, the lower end face sealing device is arranged in the annular groove of the bottom ring and fixedly connected with the annular groove of the bottom ring through the first pressing plate and the second pressing plate, and the overflow face of the lower end face makes contact with the lower end face of the guide vane. In the process of use, the upper end face sealing device and the lower end face sealing device are arranged in and fixedly connected with the annular groove of the top cover and the annular groove of the bottom ring respectively; when a gap is formed between a floating stop seal and the end faces of the guide vane, the floating stop seal axially moves to compensate for the gap, and then the floating stop seal is always kept to make contact with the end faces of the guide vane.
Description
Technical field
The present invention relates to guide vanes of water turbine, is a kind of compensation sealing device of end surface of guide vane.
Background technique
Turbine gate mechanism, is the important system that ensures Hydropower Unit stable operation, and stator is in this system, to work the critical component of opening and cutting off current.At present, the top cover, the base ring that are installed on flow passage components are only sealed in stator end, for guide vanes of water turbine sealing in the time cutting off current.In water turbine is shut down, in the time of guide vane closing, the only envelope of the upper-end surface of stator, lower end surface and facade seals, and stops the water in penstock to run off on the one hand, on the other hand, prevents that unit is in outage state shunt running.What the only envelope of guide vanes of water turbine was commonly used has several patterns such as hard sealing, soft seal.The sealing of prior art in use exposes several respects problem successively: the one, firmly seal that mounting process is strict, easy to wear in using, maintenance craft is complicated, effort when useless; The 2nd, soft seal is short, fragile working life, and particularly high head hydraulic turbine wicket gate seal is more fragile under the effect of high hydraulic pressure, working life is short; The 3rd, while use, stator floating or sinking vertically sometimes causes occurring the phenomenon of axial float, causes end face seal to be leaked; The 4th, repair quality is difficult for ensureing, can cause the water leakage of stator larger, not only wastes large water gaging energy, and operating cost is high, and generated energy is little, and directly reduces unit total reliability.
Summary of the invention
Technical problem to be solved by this invention is: the shortcoming that overcomes prior art; a kind of compensation sealing device of end surface of guide vane is provided; can compensate wear extent and the stator axial movement value of end face seal; improve end face seal effect; prevent that unit is in outage state shunt running; simplify installation and maintenance craft, extended working life and the repair cycle of end face seal, had advantages of that operating cost is low, generated energy large, unit total reliability is high.
The scheme of technical solution problem of the present invention is: a kind of compensation sealing device of end surface of guide vane, it comprises base ring, top cover, stator, the first pressing plate and the second pressing plate, described base ring and top cover are respectively equipped with along the through hole of Zhou Junbu and coaxial, the end face of base ring and the bottom surface of top cover are provided with circular groove respectively, the section of circular groove and through hole symmetry, stator two ends are provided with guide vane teunnion, stator is placed between base ring and top cover, the guide vane teunnion at two ends is installed on respectively in the coaxial through-hole of base ring and top cover and is hinged, in circular groove between two adjacent guide vane teunnions, be equipped with respectively the first pressing plate and the second pressing plate, the first pressing plate is made up of at least two sections of pressing plates consistent with annular geosynclinal concave side radian, every section of pressing plate is all positioned at the recessed side of circular groove and is connected with recessed side contacts and by screw and base ring or top cover, the second pressing plate is made up of at least two sections of pressing plates consistent with annular geosynclinal convex side radian, every section of pressing plate is all positioned at the protruding side of circular groove and is connected with protruding side contacts and by screw and base ring or top cover, it is characterized in that: also comprise upper-end surface seal arrangement and lower end surface seal arrangement, described upper-end surface seal arrangement is placed in the circular groove of top cover and is connected by the first pressing plate and the second pressing plate and top cover, the flow-passing surface of upper-end surface seal arrangement contacts with the upper-end surface of stator, lower end surface seal arrangement is placed in the circular groove of base ring and is connected by the first pressing plate and the second pressing plate and base ring, the flow-passing surface of lower end surface seal arrangement contacts with the lower end surface of stator.
Described upper-end surface seal arrangement is made up of some sections of arc seal arrangements in the uniform circular groove that is connected in top cover, every section of arc seal arrangement is placed in the circular groove between two adjacent guide vane teunnions, every section of arc seal arrangement comprises the only envelope of floating, mandrel, stage clip and polyurethane Stamping Steel Ribbon, the described only envelope of floating adopts anti abrasive rigid material, the only end face of envelope that floats is provided with protruding arc flow-passing surface upwards, recessed side and the protruding side of bottom arrange respectively shoulder, float and only seal in the circular groove that arc flow-passing surface is placed in top cover downwards, between the first pressing plate and the second pressing plate, and the unsteady end face that only seals bottom shoulder lays respectively at the bottom surface of the first pressing plate and the second pressing plate and contacts, the only arc flow-passing surface of envelope that floats contacts with the upper-end surface of stator, mandrel is placed in the bottom of circular groove and is connected, stage clip is socketed on mandrel between being placed at the bottom of float only envelope and circular groove, polyurethane Stamping Steel Ribbon is through at the bottom of stage clip is placed in unsteady only envelope and circular groove.
Described lower end surface seal arrangement has identical structure and annexation with upper-end surface seal arrangement, formed by some sections of arc seal arrangements in the uniform circular groove that is connected in base ring, the arc flow-passing surface of envelope only of floating of every section of arc seal arrangement is upwards placed in the circular groove of base ring, between the first pressing plate and the second pressing plate, the only flow-passing surface of envelope that floats contacts with the lower end surface of stator.
A kind of compensation sealing device of end surface of guide vane of the present invention, there is hard sealing durable simultaneously, feature is simply and easily installed and is overhauled in soft seal, the elastic structure of stage clip and polyurethane Stamping Steel Ribbon can make floating of rigid only seal along top cover or base ring axial displacement, thereby compensation is floated and is only sealed the gap occurring with stator end face, improve end face seal effect, prevent that stator end face from leaking and the generator set that causes thus in the shunt running of outage state, simultaneously, in the time there is axial float in stator, the gap that one side compensation stator axial float occurs, opposite side reduces stator end face and the only excessive pressure between envelope that floats that stator axial float causes, keep stator end face and float the only isostasy between envelope.When use, respectively upper-end surface seal arrangement, lower end surface seal arrangement are placed in the circular groove of top cover and base ring, make stage clip and polyurethane Stamping Steel Ribbon possess pre compressed magnitude, and be connected by the first pressing plate and the second pressing plate respectively; When the only envelope wearing and tearing of floating cause floating when only envelope occurs gap with stator end face, stage clip extends, polyurethane Stamping Steel Ribbon expands, and floats and only seals axial displacement compensation float only envelope and the gap that stator end face occurs, the only envelope that makes to float remains and stator end contact; In the time that stator floats play vertically, floating of upper-end surface seal arrangement only sealed to top offset, stage clip and the compression of polyurethane Stamping Steel Ribbon, prevent stator upper-end surface and the pressure that floats only between envelope excessive and block, simultaneously, floating of lower end surface seal arrangement only sealed to top offset, stage clip extends, polyurethane Stamping Steel Ribbon expands, compensation is floated and is only sealed the gap occurring with stator end face, the only envelope that makes to float keeps contacting with stator lower end surface, has ensured the isostasy of stator upper-end surface and upper-end surface seal arrangement, lower end surface and lower end surface seal arrangement; In the time that stator sinks play vertically, floating of upper-end surface seal arrangement only sealed to bottom offset, stage clip extends, polyurethane Stamping Steel Ribbon expands, compensation is floated and is only sealed the gap occurring with stator end face, the only envelope that makes to float keeps contacting with stator upper-end surface, and meanwhile, the unsteady only envelope of lower end surface seal arrangement is to bottom offset, the compression of stage clip and polyurethane Stamping Steel Ribbon, prevent stator lower end surface with float only seal between pressure excessive and block.Have advantages of that operating cost is low, generated energy large, unit total reliability is high.
Brief description of the drawings
Fig. 1 is the upper-end surface schematic diagram of sealing device of a kind of compensation sealing device of end surface of guide vane of the present invention;
Fig. 2 is that the A-A of Fig. 1 analyses and observe enlarged diagram;
Fig. 3 is the lower end surface schematic diagram of sealing device of a kind of compensation sealing device of end surface of guide vane of the present invention;
Fig. 4 is that the B-B of Fig. 1 analyses and observe enlarged diagram;
Fig. 5 is guide vanes of water turbine distribution schematic diagram;
Fig. 6 is stator and water turbine linkage structure schematic diagram.
In figure: 1 base ring, 2 first pressing plates, 3 screws, 4 mandrels, 5 float only seals, 6 stage clips, 7 polyurethane Stamping Steel Ribbons, 8 second pressing plates, 9 top covers, 10 stators, 11 guide vane teunnions.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
With reference to Fig. 1～Fig. 6, embodiment 1, a kind of compensation sealing device of end surface of guide vane, it comprises base ring 1, top cover 9, stator 10, the first pressing plate 2 and the second pressing plate 8, described base ring 1 and top cover 9 are respectively equipped with along the through hole of Zhou Junbu and coaxial, the bottom surface of the end face of base ring 1 and top cover 9 is provided with circular groove respectively, the section of circular groove and through hole symmetry, stator 10 two ends are provided with guide vane teunnion 11, stator 10 is placed between base ring 1 and top cover 9, the guide vane teunnion 11 at two ends is installed on respectively in the coaxial through-hole of base ring 1 and top cover 9 and is hinged, in circular groove between two adjacent guide vane teunnions 11, be equipped with respectively the first pressing plate 2 and the second pressing plate 8, the first pressing plate 2 is made up of at least two sections of pressing plates consistent with annular geosynclinal concave side radian, every section of pressing plate is all positioned at the recessed side of circular groove and is connected with recessed side contacts and by screw 3 and base ring 1 or top cover 9, the second pressing plate 8 is made up of at least two sections of pressing plates consistent with annular geosynclinal convex side radian, every section of pressing plate is all positioned at the protruding side of circular groove and is connected with protruding side contacts and by screw 3 and base ring 1 or top cover 9, also comprise upper-end surface seal arrangement and lower end surface seal arrangement, described upper-end surface seal arrangement is placed in the circular groove of top cover 9 and by the first pressing plate 2 and the second pressing plate 8 and is connected with top cover 9, the flow-passing surface of upper-end surface seal arrangement contacts with the upper-end surface of stator 10, lower end surface seal arrangement is placed in the circular groove of base ring 1 and by the first pressing plate 2 and the second pressing plate 8 and is connected with base ring 1, the flow-passing surface of lower end surface contacts with the lower end surface of stator 10.Described upper-end surface seal arrangement is made up of some sections of arc seal arrangements in the uniform circular groove that is connected in top cover 9, every section of arc seal arrangement is placed in the circular groove between two adjacent guide vane teunnions 11, every section of arc seal arrangement comprises floating and only seals 5, mandrel 4, stage clip 6 and polyurethane Stamping Steel Ribbon 7, described floating only sealed the anti abrasive rigid material of 5 employing, float and only seal 5 end face and be provided with protruding arc flow-passing surface upwards, recessed side and the protruding side of bottom arrange respectively shoulder, float and only seal 5 arc flow-passing surface and be placed in downwards in the circular groove of top cover 9, between the first pressing plate 2 and the second pressing plate 8, and the unsteady end face that only seals 5 bottom shoulders lays respectively at the bottom surface of the first pressing plate 2 and the second pressing plate 8 and contacts, float and only seal 5 arc flow-passing surface and contact with the upper-end surface of stator 10, mandrel 4 is placed in the bottom of circular groove and is connected, stage clip 6 be placed in float only seal 5 and circular groove at the bottom of between be socketed on mandrel 4, polyurethane Stamping Steel Ribbon 7 through stage clip 6 be placed in float only seal 5 and circular groove at the bottom of.Described lower end surface seal arrangement has identical structure and annexation with upper-end surface seal arrangement, formed by some sections of arc seal arrangements in the uniform circular groove that is connected in base ring 1, the floating of every section of arc seal arrangement only sealed in the circular groove that 5 arc flow-passing surface is upwards placed in base ring 1, between the first pressing plate 2 and the second pressing plate 8, float and only seal 5 arc flow-passing surface and contact with the lower end surface of stator 10.When use, respectively upper-end surface seal arrangement, lower end surface seal arrangement are placed in the circular groove of top cover 9 and base ring 1, make stage clip 6 and polyurethane Stamping Steel Ribbon 7 possess pre compressed magnitude, and be connected by the first pressing plate 2 and the second pressing plate 8 respectively; Only seal 5 wearing and tearing causes floating and only seals 5 with stator 10 end faces while there is gap when floating, stage clip 6 extends, polyurethane Stamping Steel Ribbon 7 expands, float and only seal 5 axial displacements compensation and float and only seal 5 gaps that occur with stator 10 end faces, make to float and only seal 5 and remain and stator 10 end contacts; In the time that stator 10 floats play vertically, floating of upper-end surface seal arrangement only seals 5 to top offset, stage clip 6 and polyurethane Stamping Steel Ribbon 7 compress, prevent stator 10 upper-end surfaces and float only seal 5 between pressure excessive and block, simultaneously, floating of lower end surface seal arrangement only seals 5 to top offset, stage clip 6 extends, polyurethane Stamping Steel Ribbon 7 expands, compensation float only seal 5 with stator 10 end faces occur gap, make to float and only seal 5 maintenances and contact with stator 10 lower end surfaces, ensured the isostasy of stator 10 upper-end surfaces and upper-end surface seal arrangement, lower end surface and lower end surface seal arrangement; In the time that stator 10 sinks play vertically, floating of lower end surface seal arrangement only seals 5 to bottom offset, stage clip 6 and polyurethane Stamping Steel Ribbon 7 compress, prevent stator 10 lower end surfaces and float only seal 5 between pressure excessive and block, meanwhile, floating of upper-end surface seal arrangement only seals 5 to bottom offset, and stage clip 6 extends, polyurethane Stamping Steel Ribbon 7 expands, compensation is floated and is only sealed 5 gaps that occur with stator 10 end faces, makes to float and only seals 5 maintenances and contact with stator 10 upper-end surfaces.
Embodiment 2, the present embodiment and embodiment's 1 simple structure and annexation are basic identical, difference is: polyurethane Stamping Steel Ribbon 7 through stage clip 6 be placed in float only seal 5 and circular groove at the bottom of time, the hole that polyurethane Stamping Steel Ribbon 7 installs stage clip 6 is blind hole, and the polyurethane Stamping Steel Ribbon 7 of stage clip 6 by blind hole bottom only seals 5 and contact with unsteady.
Claims (3)
1. a compensation sealing device of end surface of guide vane, it comprises base ring, top cover, stator, the first pressing plate and the second pressing plate, described base ring and top cover are respectively equipped with along the through hole of Zhou Junbu and coaxial, the end face of base ring and the bottom surface of top cover are provided with circular groove respectively, the section of circular groove and through hole symmetry, stator two ends are provided with guide vane teunnion, stator is placed between base ring and top cover, the guide vane teunnion at two ends is installed on respectively in the coaxial through-hole of base ring and top cover and is hinged, in circular groove between two adjacent guide vane teunnions, be equipped with respectively the first pressing plate and the second pressing plate, the first pressing plate is made up of at least two sections of pressing plates consistent with annular geosynclinal concave side radian, every section of pressing plate is all positioned at the recessed side of circular groove and is connected with recessed side contacts and by screw and base ring or top cover, the second pressing plate is made up of at least two sections of pressing plates consistent with annular geosynclinal convex side radian, every section of pressing plate is all positioned at the protruding side of circular groove and is connected with protruding side contacts and by screw and base ring or top cover, it is characterized in that: also comprise upper-end surface seal arrangement and lower end surface seal arrangement, described upper-end surface seal arrangement is placed in the circular groove of top cover and is connected by the first pressing plate and the second pressing plate and top cover, the flow-passing surface of upper-end surface seal arrangement contacts with the upper-end surface of stator, lower end surface seal arrangement is placed in the circular groove of base ring and is connected by the first pressing plate and the second pressing plate and base ring, the flow-passing surface of lower end surface seal arrangement contacts with the lower end surface of stator.
2. the compensation sealing device of end surface of guide vane of one as claimed in claim 1, it is characterized in that: described upper-end surface seal arrangement is made up of some sections of arc seal arrangements in the uniform circular groove that is connected in top cover, every section of arc seal arrangement is placed in the circular groove between two adjacent guide vane teunnions, every section of arc seal arrangement comprises the only envelope of floating, mandrel, stage clip and polyurethane Stamping Steel Ribbon, the described only envelope of floating adopts anti abrasive rigid material, the only end face of envelope that floats is provided with protruding arc flow-passing surface upwards, recessed side and the protruding side of bottom arrange respectively shoulder, float and only seal in the circular groove that arc flow-passing surface is placed in top cover downwards, between the first pressing plate and the second pressing plate, and the unsteady end face that only seals bottom shoulder lays respectively at the bottom surface of the first pressing plate and the second pressing plate and contacts, the only arc flow-passing surface of envelope that floats contacts with the upper-end surface of stator, mandrel is placed in the bottom of circular groove and is connected, stage clip is socketed on mandrel between being placed at the bottom of float only envelope and circular groove, polyurethane Stamping Steel Ribbon is through at the bottom of stage clip is placed in unsteady only envelope and circular groove.
3. the compensation sealing device of end surface of guide vane of one as claimed in claim 1, it is characterized in that: described lower end surface seal arrangement has identical structure and annexation with upper-end surface seal arrangement, formed by some sections of arc seal arrangements in the uniform circular groove that is connected in base ring, the arc flow-passing surface of envelope only of floating of every section of arc seal arrangement is upwards placed in the circular groove of base ring, between the first pressing plate and the second pressing plate, the only flow-passing surface of envelope that floats contacts with the lower end surface of stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186678.3A CN103939260A (en) | 2014-05-06 | 2014-05-06 | Compensation type guide vane end face sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186678.3A CN103939260A (en) | 2014-05-06 | 2014-05-06 | Compensation type guide vane end face sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939260A true CN103939260A (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410186678.3A Pending CN103939260A (en) | 2014-05-06 | 2014-05-06 | Compensation type guide vane end face sealing device |
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| Country | Link |
|---|---|
| CN (1) | CN103939260A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5575574A (en) * | 1978-12-01 | 1980-06-06 | Hitachi Ltd | Guide vane sealer |
| CA1095373A (en) * | 1978-06-01 | 1981-02-10 | Gleb S. Schegolev | Arrangement for end-face sealing of guide vanes in the distributor of a hydraulic machine |
| JPH05256245A (en) * | 1992-03-12 | 1993-10-05 | Hitachi Ltd | Guide vane seal device for water turbine and reversible pump |
| CN202040329U (en) * | 2011-05-18 | 2011-11-16 | 南京凯盛国际工程有限公司 | Sliding seal device |
| CN202927045U (en) * | 2012-11-02 | 2013-05-08 | 中国长江电力股份有限公司 | Sectional press plate for end face seal of water guide mechanism |
| CN203809195U (en) * | 2014-05-06 | 2014-09-03 | 国家电网公司 | Compensation type guide vane end face sealing device |
-
2014
- 2014-05-06 CN CN201410186678.3A patent/CN103939260A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1095373A (en) * | 1978-06-01 | 1981-02-10 | Gleb S. Schegolev | Arrangement for end-face sealing of guide vanes in the distributor of a hydraulic machine |
| JPS5575574A (en) * | 1978-12-01 | 1980-06-06 | Hitachi Ltd | Guide vane sealer |
| JPH05256245A (en) * | 1992-03-12 | 1993-10-05 | Hitachi Ltd | Guide vane seal device for water turbine and reversible pump |
| CN202040329U (en) * | 2011-05-18 | 2011-11-16 | 南京凯盛国际工程有限公司 | Sliding seal device |
| CN202927045U (en) * | 2012-11-02 | 2013-05-08 | 中国长江电力股份有限公司 | Sectional press plate for end face seal of water guide mechanism |
| CN203809195U (en) * | 2014-05-06 | 2014-09-03 | 国家电网公司 | Compensation type guide vane end face sealing device |
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Application publication date: 20140723 |