CN204492901U - A kind of multistage anti-dropping type brush steam seal ring - Google Patents
A kind of multistage anti-dropping type brush steam seal ring Download PDFInfo
- Publication number
- CN204492901U CN204492901U CN201420840262.4U CN201420840262U CN204492901U CN 204492901 U CN204492901 U CN 204492901U CN 201420840262 U CN201420840262 U CN 201420840262U CN 204492901 U CN204492901 U CN 204492901U
- Authority
- CN
- China
- Prior art keywords
- brush
- steam seal
- stamping steel
- steel ribbon
- seal 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.)
- Active
Links
Abstract
The utility model relates to a kind of multistage anti-dropping type brush steam seal ring, it is characterized in that, described multistage anti-dropping type brush steam seal ring is made up of several sections of labyrinth ring end-to-ends, described labyrinth ring comprises ring body, described ring body is provided with at least one high tooth Stamping Steel Ribbon, at least one low tooth Stamping Steel Ribbon, at least one seals brush.The Steam loss of this multistage anti-dropping type brush steam seal ring is only the 10%-20% of former serrate-type steam seal.The own intensity of strength ratio wire after welding is taller, the phenomenons such as silk can not be fallen, there is good sealability, the speed that this brush steam seal sample can bear is more than 305 meter per seconds, heatproof can reach more than 690 DEG C, energy is long-term, stable, safe operation, can be applicable to large rotor machinery and do motive sealing use, is particularly suitable for carrying out replacing upgrading use to the motive sealing of existing steam turbine.
Description
Technical field
The present invention relates to a kind of steam seal ring, relate in particular to a kind of multistage anti-dropping type brush steam seal ring, be particularly suitable for the multistage loose-prevention type type brush steam seal ring that the large rotor machinery motive sealings such as the steam turbine of Turbo-generator Set use, belong to the seal arrangement of steam turbine.
Background technique
Affect turbine efficiency, the economic factor such as coal consumption and the steam consumption is a lot, the major reason wherein causing turbine efficiency to reduce is that steam turbine is through-flow dynamic, the leakage of stator blade packing and shaft seal, particularly turbine parameters is more and more higher, under identical seal clearance, raised by the density of interstage gland steam, flow increases, leak vapour not only bypass and may do work again in dynamic or stator blade, and cause the disturbance of next stage sprue, double negative effect has a strong impact on stage efficiency, as can be seen here, the leakage rate of steam turbine is greatly the key factor affecting turbine efficiency reduction, improve packing, it is very urgent that shaft seal reduces leakage rate.The most frequently used at present steam seal ring of steam turbine mostly is comb-shaped structure, its working principle forces fluid to successively decrease its pressure to reduce leakage by tortuous approach, when assembling, labyrinth ring is tightened to design attitude by the spring pressure being placed on packing segment back, when gland sealing gear and Rub-impact, labyrinth ring has certain yielding, unlikely major injury axle and labyrinth ring, but can not prevent friction.In recent years, along with the development of technology is from having introduced various new packing abroad, comparatively typically had: contact-type packing, side tooth packing, Honeycomb steam seal etc., but
Still there is sealability bad, leakage rate is large, and axle such as easily to vibrate at the deficiency.The design of steam turbine need consider steam turbine cold conditions, warm state and hot various operating mode, ensures from starting and cold conditions at full capacity namely can stable operation hot each operating mode.When steam turbine is at starting, halfload, at full capacity operating mode, it is poor that its rotor and cylinder also exist different relative expansions, the low toothed portion of packing will be caused like this to come to nothing, in addition because turbine making error and steam turbine alignment error also can cause gland sealing gear to come to nothing or collision phenomenon, leakage rate is caused to increase.Therefore, a kind of new technological scheme of exigence solves the problems of the technologies described above.
Summary of the invention
In order to solve above-mentioned Problems existing, the invention discloses a kind of multistage anti-dropping type brush steam seal ring, this technological scheme global design is ingenious, simple and reasonable, safe and reliable, easy to use, good seal performance.This technological scheme be realize on same circle labyrinth casing high and low gland sealing gear multi-stage combination brush steam seal ring, thus ensure that steam turbine is when various operating mode is run, there is not, collision phenomenon empty with rotor seal emaciated face in gland sealing gear, reduces leakage rate, to reach optimal seal effect.
To achieve these goals, technological scheme of the present invention is as follows: a kind of multistage anti-dropping type brush steam seal ring, it is characterized in that, described multistage anti-dropping type brush steam seal ring is made up of several sections of labyrinth ring end-to-ends, described labyrinth ring comprises ring body, described ring body is provided with at least one high tooth Stamping Steel Ribbon, at least one low tooth Stamping Steel Ribbon, at least one seals brush
Or described ring body is provided with at least one sealing brush;
Or described ring body is provided with at least one sealing brush and at least one high tooth Stamping Steel Ribbon;
Or described ring body is provided with at least one sealing brush and at least one low tooth Stamping Steel Ribbon.In this technological scheme, every section of labyrinth ring includes ring body, high tooth Stamping Steel Ribbon, low tooth Stamping Steel Ribbon and sealing brush; Propose first in this technological scheme and have at least a high tooth Stamping Steel Ribbon or low tooth Stamping Steel Ribbon to replace with sealing brush by of the prior art, also one group of high and low tooth Stamping Steel Ribbon can be had at least according to demand to change sealing brush into, and even whole high and low tooth Stamping Steel Ribbon changes sealing brush into.This technological scheme can adapt to moment radial deformation, axial float, the eccentric motion of rotor, ensure that coming to nothing does not appear in gland sealing gear and rotor seal face, collision phenomenon, reduce seal clearance under the premise that security is guaranteed as far as possible, can suitably increase rotor oscillation resistance when contacting sealing thus be conducive to improving the stability of rotor, being applicable to the large rotor machinery particularly multistage anti-dropping type brush steam seal ring that uses of steam turbine motive sealing.
As a modification of the present invention, described sealing brush comprises long sealing brush or/and short sealing brush.
As a modification of the present invention, described ring body is provided with U-type groove, described high tooth Stamping Steel Ribbon, low tooth Stamping Steel Ribbon, sealing brush are all packed in U-type groove; By roll riveting or manual riveting, high and low tooth Stamping Steel Ribbon, sealing brush are packed in U-type groove corresponding to ring body, by Linear cut, high and low tooth Stamping Steel Ribbon, sealing brush are successively worked into figure paper size again, or fixed by frock, drawing requirement size is reached through machining, school circle is carried out before can riveting for the large ring body of distortion, carry out subsequent handling again, the steam seal ring size manufactured like this is accurate, and concentricity is high.Described high and low tooth Stamping Steel Ribbon is customed product.
As a modification of the present invention, described sealing brush comprises clamping plate and wire, and described outer rim wiry is fixed between two panels clamping plate, and described outer rim wiry is welded between two panels clamping plate.Sealing brush is primarily of compact arranged flexible, resistant to elevated temperatures thin alloy threads composition, have fabulous elasticity, in conjunction with the cooperation of labyrinth ring arc block back side spring sheet, be rotor collide mill time, wire can elastic yield, not easily be worn away, ensure that the safe operation of unit under small―gap suture even zero clearance, even if when unit crosses critical speed of rotation and variable working condition, wire can be followed axle and effectively be made a concession, be not worn, after treating set steady, good sealability can be recovered.Again due to the nonuniformity in wire gap, uniform incoming flow is entered in brush tow and becomes uneven, and from brush tow region closely to loose brush tow region bias current, these bias currents form concurrent and jet gradually between wire, and produce random Secondary Flow and swirling flow, and before a jet runs into wire bundle closely, will moving direction be changed and become the lateral flow vertical with main flow direction and cross flow, the cross flow that just can produce due to wire bundle can make fluid create selfsealings effect, it can make the overall presure drop flowing transversely through brush increase thus reduce leakage further.
As a modification of the present invention, the high-temperature alloy silk that diameter is 0.05-0.2mm, hardness is more than or equal to 80HB, tensile strength is more than or equal to 800Mpa of described metal wire layer, becomes thickness to be the annular solid of 0.5---5mm by set angle close-packed arrays; In order to reduce the rotational resistance of countershaft, the setting arrangement angle of described high-temperature alloy silk is preferably 20-60 degree.The Steam loss of multistage anti-dropping type brush steam seal ring of the present invention is only the 10%-20% of former serrate-type steam seal.The own intensity of strength ratio wire after welding is taller, the phenomenons such as silk can not be fallen, there is good sealability, the speed that this brush steam seal sample can bear is more than 305 meter per seconds, heatproof can reach more than 690 DEG C, energy is long-term, stable, safe operation, can be applicable to large rotor machinery and do motive sealing use, is particularly suitable for carrying out replacing upgrading use to the motive sealing of existing steam turbine.
As a modification of the present invention, described ring body is provided with high tooth Stamping Steel Ribbon, low tooth Stamping Steel Ribbon and at least twice short sealing brush.For the low toothed portion especially easily come to nothing with rotor seal face, specific aim can be made into two roads sealing brush or more multiple-sealed brushes, effectively prevent from coming to nothing, according to circumstances arrange voluntarily.
Relative to prior art, advantage of the present invention is as follows: 1) ingenious, simple and reasonable, safe and reliable, easy to use, the good seal performance of this technological scheme global design; 2) propose first in this technological scheme by of the prior art have at least a high tooth Stamping Steel Ribbon or low tooth Stamping Steel Ribbon replace with sealing brush, also one group of high and low tooth Stamping Steel Ribbon can be had at least according to demand to change sealing brush into, even whole high and low tooth Stamping Steel Ribbon changes the design concept of sealing brush into, for the low toothed portion especially easily come to nothing with rotor seal face, specific aim can be made into two road sealing brushes, effectively prevent from coming to nothing; 3) this technological scheme can adapt to moment radial deformation, axial float, the eccentric motion of rotor, ensure that coming to nothing does not appear in gland sealing gear and rotor seal face, collision phenomenon, reduce seal clearance under the premise that security is guaranteed as far as possible, can suitably increase rotor oscillation resistance when contacting sealing thus be conducive to improving the stability of rotor, being applicable to the large rotor machinery particularly multistage anti-dropping type brush steam seal ring that uses of steam turbine motive sealing; 4) Steam loss of this multistage anti-dropping type brush steam seal ring is only the 10%-20% of former serrate-type steam seal.The own intensity of strength ratio wire after welding is taller, the phenomenons such as silk can not be fallen, there is good sealability, the speed that this brush steam seal sample can bear is more than 305 meter per seconds, heatproof can reach more than 690 DEG C, energy is long-term, stable, safe operation, can be applicable to large rotor machinery and do motive sealing use, is particularly suitable for carrying out replacing upgrading use to the motive sealing of existing steam turbine; 5) this technological scheme cost is lower, is convenient to apply on a large scale.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing serrate-type steam seal circle;
Fig. 2 is the structural representation of the packing ring body of multistage anti-dropping type brush steam seal ring in the present invention;
Fig. 3-1 is the structural representation of long sealing brush in the present invention;
Fig. 3-2 is structural representations of the short-and-medium sealing brush of the present invention;
Fig. 4 is the structural representation with an a sealing brush replacement high tooth Stamping Steel Ribbon in the present invention;
Fig. 5 is the structural representation with an a sealing brush replacement low tooth Stamping Steel Ribbon in the present invention;
Fig. 6 is the structural representation with two sealing brush replacements low tooth Stamping Steel Ribbon in the present invention;
Fig. 7 is the structural representation with two sealing brush replacement high tooth Stamping Steel Ribbons and a low tooth Stamping Steel Ribbon in the present invention;
Fig. 8 is the structural representation with five sealing brush replacement two high tooth Stamping Steel Ribbons and three low tooth Stamping Steel Ribbons in the present invention;
In figure: 1 is ring body, 2 is high tooth Stamping Steel Ribbons, and 3 is low tooth Stamping Steel Ribbons, and 5 is clamping plate, and 6 is metal wire layers, and 41 is long sealing brushes, and 42 is that short sealing is brushed, 7, U-type groove.
Embodiment
In order to deepen understanding of the present invention and understanding, below in conjunction with the drawings and specific embodiments, illustrate the present invention further.
embodiment 1:
See Fig. 4, a kind of multistage anti-dropping type brush steam seal ring, described multistage anti-dropping type brush steam seal ring is made up of several sections of labyrinth ring end-to-ends, described labyrinth ring comprises ring body 1, described ring body is provided with at least one high tooth Stamping Steel Ribbon 2, at least one low tooth Stamping Steel Ribbon 3, at least one seals brush, in this technological scheme, every section of labyrinth ring includes ring body 1, high tooth Stamping Steel Ribbon 2, low tooth Stamping Steel Ribbon 3 and sealing brush, and described sealing brush comprises long sealing brush 41 or/and short sealing brush 42.See Fig. 1, steam seal ring of the prior art is made up of multiple highly dense strip of paper used for sealing 2, low Stamping Steel Ribbon 3.Propose first in this technological scheme and have at least a high tooth Stamping Steel Ribbon 2 or low tooth Stamping Steel Ribbon 3 to replace with sealing brush 41 or 42 by of the prior art, also one group of high and low tooth Stamping Steel Ribbon can be had at least according to demand to change sealing brush into, and even whole high and low tooth Stamping Steel Ribbon changes sealing brush into.For the low toothed portion especially easily come to nothing with rotor seal face, specific aim can be made into two road sealing brush or three seals brushes, effectively prevent from coming to nothing, specifically see Fig. 6, a low tooth Stamping Steel Ribbon 3 is replaced with two short sealing brushes 42, also can with the low tooth Stamping Steel Ribbon of three even more how short sealing brushes replacement one.Length and the quantity of the sealing brush of multistage anti-dropping type brush steam seal ring of the present invention can set as required, see Fig. 4, replace a high tooth Stamping Steel Ribbon 2 with a long sealing brush 41; See Fig. 5, a low tooth Stamping Steel Ribbon 3 is replaced with a short sealing brush 42, see Fig. 7, a high tooth Stamping Steel Ribbon and a low tooth Stamping Steel Ribbon is replaced respectively with a long sealing brush 41 and a short sealing brush 42, see Fig. 8, replace two high tooth Stamping Steel Ribbons 2 and three low tooth Stamping Steel Ribbons 3 respectively with two long sealing brushes 41 and three short sealing brushes 42, when not considering cost, the sealing effect that sealing brush quantity is more is better.This technological scheme can adapt to moment radial deformation, axial float, the eccentric motion of rotor, ensure that coming to nothing does not appear in gland sealing gear and rotor seal face, collision phenomenon, reduce seal clearance under the premise that security is guaranteed as far as possible, can suitably increase rotor oscillation resistance when contacting sealing thus be conducive to improving the stability of rotor, being applicable to the large rotor machinery particularly multistage anti-dropping type brush steam seal ring that uses of steam turbine motive sealing.
embodiment 2:
See Fig. 4, as a modification of the present invention, described ring body is provided with U-type groove 7, described high tooth Stamping Steel Ribbon 2, low tooth Stamping Steel Ribbon 3, sealing brush are all packed in U-type groove 7; By roll riveting or manual riveting, high and low tooth Stamping Steel Ribbon, sealing brush are packed in U-type groove corresponding to ring body 7, by Linear cut, high and low tooth Stamping Steel Ribbon, sealing brush are successively worked into figure paper size again, or fixed by frock, drawing requirement size is reached through machining, school circle is carried out before can riveting for the large ring body of distortion, carry out subsequent handling again, the steam seal ring size manufactured like this is accurate, and concentricity is high.Described high and low tooth Stamping Steel Ribbon is customed product.
embodiment 3:
See Fig. 3, as a modification of the present invention, described sealing brush comprises clamping plate 5 and wire 6, and the outer rim of described wire 6 is fixed between two panels clamping plate 5, and the outer rim of described wire 6 is welded or is riveted between two panels clamping plate 5.Sealing brush is primarily of compact arranged flexible, resistant to elevated temperatures thin alloy threads composition, have fabulous elasticity, in conjunction with the cooperation of labyrinth ring arc block back side spring sheet, be rotor collide mill time, wire can elastic yield, not easily be worn away, ensure that the safe operation of unit under small―gap suture even zero clearance, even if when unit crosses critical speed of rotation and variable working condition, wire can be followed axle and effectively be made a concession, be not worn, after treating set steady, good sealability can be recovered.Again due to the nonuniformity in wire gap, uniform incoming flow is entered in brush tow and becomes uneven, and from brush tow region closely to loose brush tow region bias current, these bias currents form concurrent and jet gradually between wire, and produce random Secondary Flow and swirling flow, and before a jet runs into wire bundle closely, will moving direction be changed and become the lateral flow vertical with main flow direction and cross flow, the cross flow that just can produce due to wire bundle can make fluid create selfsealings effect, it can make the overall presure drop flowing transversely through brush increase thus reduce leakage further.
embodiment 4:
See Fig. 3, as a modification of the present invention, the high-temperature alloy silk that diameter is 0.05-0.2mm, hardness is more than or equal to 80HB, tensile strength is more than or equal to 800Mpa of described metal wire layer 6, becomes thickness to be the annular solid of 0.5---5mm by set angle close-packed arrays; In order to reduce the rotational resistance of countershaft, the setting arrangement angle of described high-temperature alloy silk is preferably 20-60 degree.The Steam loss of multistage anti-dropping type brush steam seal ring of the present invention is only the 10%-20% of former serrate-type steam seal.The own intensity of strength ratio wire after welding is taller, the phenomenons such as silk can not be fallen, there is good sealability, the speed that this brush steam seal sample can bear is more than 305 meter per seconds, heatproof can reach more than 690 DEG C, energy is long-term, stable, safe operation, can be applicable to large rotor machinery and do motive sealing use, is particularly suitable for carrying out replacing upgrading use to the motive sealing of existing steam turbine.
At least one in technical characteristics described in embodiment 2,3,4 and embodiment 1 can also combine by the present invention, form new mode of execution.
It should be noted that above-described embodiment is only preferred embodiment of the present invention; be not for limiting protection scope of the present invention; the equivalent replacement made on the basis of the above or substitute all belong to protection scope of the present invention, protection scope of the present invention is as the criterion with claims.
Claims (8)
1. a multistage anti-dropping type brush steam seal ring, it is characterized in that, described multistage anti-dropping type brush steam seal ring is made up of several sections of labyrinth ring end-to-ends, and described labyrinth ring comprises ring body, described ring body is provided with at least one high tooth Stamping Steel Ribbon, at least one low tooth Stamping Steel Ribbon, at least one seals brush;
Or described ring body is provided with at least one sealing brush;
Or described ring body is provided with at least one sealing brush and at least one high tooth Stamping Steel Ribbon;
Or described ring body is provided with at least one sealing brush and at least one low tooth Stamping Steel Ribbon.
2. multistage anti-dropping type brush steam seal ring according to claim 1, is characterized in that, described sealing brush comprises long sealing brush or/and short sealing brush.
3. multistage anti-dropping type brush steam seal ring according to claim 2, is characterized in that, described ring body is provided with U-type groove, and described high tooth Stamping Steel Ribbon, low tooth Stamping Steel Ribbon, sealing brush are all packed in U-type groove.
4. multistage anti-dropping type brush steam seal ring according to claim 2, is characterized in that, described sealing brush comprises clamping plate and wire, and described outer rim wiry is fixed between two panels clamping plate.
5. multistage anti-dropping type brush steam seal ring according to claim 4, is characterized in that, described outer rim wiry is welded between two panels clamping plate.
6. multistage anti-dropping type brush steam seal ring according to claim 5, it is characterized in that, the high-temperature alloy silk that diameter is 0.05-0.2mm, hardness is more than or equal to 80HB, tensile strength is more than or equal to 800Mpa of described metal wire layer, becomes thickness to be the annular solid of 0.5---5mm by set angle close-packed arrays.
7. multistage anti-dropping type brush steam seal ring according to claim 6, is characterized in that, the setting arrangement angle of described high-temperature alloy silk is 20-60 degree.
8. multistage anti-dropping type brush steam seal ring according to claim 7, is characterized in that, described ring body is provided with high tooth Stamping Steel Ribbon, low tooth Stamping Steel Ribbon and at least twice short sealing brush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420840262.4U CN204492901U (en) | 2014-12-26 | 2014-12-26 | A kind of multistage anti-dropping type brush steam seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420840262.4U CN204492901U (en) | 2014-12-26 | 2014-12-26 | A kind of multistage anti-dropping type brush steam seal ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204492901U true CN204492901U (en) | 2015-07-22 |
Family
ID=53572227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420840262.4U Active CN204492901U (en) | 2014-12-26 | 2014-12-26 | A kind of multistage anti-dropping type brush steam seal ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204492901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106400569A (en) * | 2016-12-01 | 2017-02-15 | 怀宁县天元纸业有限公司 | Papermaking defibrator |
-
2014
- 2014-12-26 CN CN201420840262.4U patent/CN204492901U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106400569A (en) * | 2016-12-01 | 2017-02-15 | 怀宁县天元纸业有限公司 | Papermaking defibrator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104564175A (en) | Multistage disengagement-preventing brush type steam seal ring | |
| CN203374322U (en) | Low-pressure separating board for steam turbine double-rotor exchanging circulating water heat supply | |
| CN101660430A (en) | Telescopic brush type gland ring | |
| US20240003424A1 (en) | Non-Contact Self-Impact Seal Efficient in Throttling and Fixed in Clearance | |
| CN204492901U (en) | A kind of multistage anti-dropping type brush steam seal ring | |
| CN204200279U (en) | A kind of turbine high-temperature heat expansion compensates stator sealing configuration | |
| CN108019243B (en) | Turbine with integral bearing seat | |
| CN102588007B (en) | Combination method for steam seals of steam turbine | |
| CN203978514U (en) | A kind of split type 300MW level steam turbine nozzle sets | |
| CN201650378U (en) | Retractable brush type steam seal ring | |
| CN203161303U (en) | Self-adjusting honeycomb brush type dynamic steam seal | |
| CN113642133B (en) | Method for calculating inner width of rotating wheel of water turbine | |
| CN102269048A (en) | Heat insulation intercooling circulating lubrication double-rotation piston type double-shaft internal combustion engine | |
| CN203756241U (en) | Compound ring brush type vapor seal | |
| CN101922401A (en) | Impact double-rotary-wheel water turbine generating device | |
| CN206338094U (en) | F type contrate bicavate brush steam seals | |
| Harano et al. | Practical application of high-performance francis-turbine runner fitted with splitter blades at ontake and shinkurobegawa no. 3 power stations of the Kansai electric power CO., Inc | |
| CN106545363A (en) | A kind of miniature blade-free turbine | |
| CN202866903U (en) | Brush type honeycomb vapor seal | |
| CN205277823U (en) | Dry -type screw vacuum pump screw rotor terminal surface molded lines | |
| CN207568660U (en) | A kind of intensive toe joint touch packing | |
| CN113591254B (en) | Calculation method for runaway rotational speed of water turbine bucket | |
| CN201460994U (en) | Novel double-tooth sharp-lateral-tooth steam seal | |
| CN205714294U (en) | Throttling expansion formula intensive tooth packing | |
| CN204552841U (en) | A kind of turbine end seal ring of new structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 223112 Jiangsu Hongze Huaian County Economic Development Zone Science and Technology Pioneer Park 12 Patentee after: Jiangsu Xin Xin Run Polytron Technologies Inc Address before: 211103 1 Chun Xu Road, Chunhua Industrial Park, Jiangning District, Nanjing, Jiangsu. Patentee before: Jiangsu Sunray Technology Co., Ltd. |