CN102296994A - Manufacturing technique for brush type steam seal for steam turbines - Google Patents
Manufacturing technique for brush type steam seal for steam turbines Download PDFInfo
- Publication number
- CN102296994A CN102296994A CN2011102201158A CN201110220115A CN102296994A CN 102296994 A CN102296994 A CN 102296994A CN 2011102201158 A CN2011102201158 A CN 2011102201158A CN 201110220115 A CN201110220115 A CN 201110220115A CN 102296994 A CN102296994 A CN 102296994A
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- brush
- bunch
- backboard
- steam
- brush silk
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Abstract
The invention discloses a manufacturing technique for a brush type steam seal for steam turbines. The technique uniformly applies a layer of adhesive on each layer of metal wires when a brush wire bundle is wound, so that all the layers of metal wires can be bonded by the adhesive to form a whole body. After the wound brush wire bundle is cut into brush wire clusters, the metal wires are still bonded together, consequently, when the bore diameter of a brush type seal ring is machined and the redundant brush wire clusters are cut off in rows, operation is highly convenient, moreover, the uniformity of the lengths of the brush wire clusters can be guaranteed, the brush wires can be arranged in order and cannot be curved, as a result, the sealing effect of the brush steam seal can be effectively enhanced, and thereby the efficiency of a steam turbine can be increased.
Description
Technical field
The present invention relates to steam turbine and make field, particularly a kind of manufacturing process of steam turbine brush steam seal.
Background technique
The quality that seals between the dynamic and static parts of steam turbine will be directly connected to the height of turbine efficiency.The seal ring that steam turbine is commonly used mainly contains and dredges tooth sealing, honeycomb seal, adjustable sealing at present, these traditional rigidity gland sealing gears are as long as fall with rotor grazing very quick-wearing, can form nonvolatil leakage way, increased leakage rate, thereby can cause bad influence Efficiency of Steam Turbine.
Brush steam seal is a kind of novel steam turbine flexible sealing, its structure as shown in Figure 1, brush steam seal is made up of steam seal ring 1 and brush silk ring, brush silk ring is stuck in the groove of steam seal ring, the brush silk encircles by header board 2, backboard 4 and the brush silk bunches 3 that is clipped between the two to be formed.As shown in Figure 2, brush silk bunches 3 becomes certain inclination angle is arranged along rotor 5 radial lines, thereby makes bristle keep the sealing state of " zero clearance " in operation process.Because the brush silk in the brush silk ring is flexible, active force between brush silk bunches 3 and the rotor 5 is minimum, and when running into rotor radial and beat, bristle can be drawn back fast and be allowed, the seal clearance of can remaining valid, and then can guarantee that unit is in minimum clearance even can be safe operation under the situation of zero clearance.Even if in the time of the mistake critical speed of rotation of unit and variable working condition, brush silk bunches 3 also can be followed dynamic running shaft and be carried out a certain amount of yielding, makes running shaft can not form destructive wearing and tearing; After treating the steam turbine set steady, can recover excellent sealing performance again.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention provides a kind of preparation process of the steam turbine brush steam seal with better sealing effect.
For solving the problems of the technologies described above, the present invention adopts following technological scheme:
A kind of manufacturing process of steam turbine brush steam seal is characterized in that it comprises the steps:
1) twine the brush tow, twine wire at the instrument higher slice that twines the brush tow, every winding one metal wire layer evenly applies one deck binding agent on wire;
The brush tow that 2) will wind cuts into several segments and forms brush silk bunch;
3) according to the header board and the backboard of size requirement processing and fabricating ring;
4) arrange brush silk bunch, will bunch neat being arranged between header board and the backboard of brush silk, brush silk bunch and header board, backboard outward edge tangent line angle at 45;
5) will brush silk bunch is welded on and forms a brush seal circle between header board and the backboard;
6) above-mentioned brush seal circle is contained in the groove of labyrinth casing;
7), will brush silk bunch unnecessary length excision according to the diameter of bore of size requirement processing brush seal circle;
8) binding agent on the cleaning brush silk bunch.
Preferably, in step 2) in will brush tow and cut into several segments and adopt the mode of waterpower cutting to carry out.
Preferably, when step 4) brush silk bunch is arranged, with the cylindrical of backboard as locating basis, brush silk bunch is placed on the backboard, order is arranged as requested, have angle to arrange by orientation tool, every brush silk bunch is nuzzled each other, with glue brush thread bunch is fixed then, after treating whole circle brush silk bunch whole assembling and positioning, header board is installed again the brush silk that installs bunch is tightly clamped by header board, backboard.
Preferably, when step 5) is welded, one pressing plate respectively is set, deforms to prevent header board in the welding process, backboard in the outside of header board and backboard.
Preferably, bunch unnecessary length excision of brush silk adopts the mode of line cutting to carry out in step 7).
Preferably, bunch unnecessary length excision of brush silk adopts the mode of step grinding to carry out in step 7).
Technique scheme has following beneficial effect: the manufacturing process of this steam turbine brush steam seal evenly applies one deck binding agent on every layer of wire when twining the brush tow, make every layer of wire bonding as a whole by binding agent, wire still bonds together after the brush tow that is wound in is cut into brush silk bunch, like this when the diameter of bore of processing brush seal circle, just can to brush silk bunch unnecessary length in a row excise the time, operating, it is very convenient to bring, and can guarantee to brush the unification of silk bunch length, make brush silk marshalling and can not produce bending, the sealing effect of this brush steam seal is effectively improved, and then improve Efficiency of Steam Turbine.
Description of drawings
Fig. 1 is the structural representation of brush steam seal.
Fig. 2 is the structural representation of brush steam seal when cooperating with rotor.
Embodiment
The manufacturing process of this steam turbine brush steam seal comprises the steps:
At first coiling brush tow according to the needs that twine brush tow radial length size, designs the instrument that twines the brush tow earlier, twines the numerical control automatic winding displacement machine of brush tow according to the needs selection of the diameter dimension that twines the brush tow.Before twining the brush tow, at first twining coiling one deck fish paper on the instrument of brushing tow, beginning to twine the wire first layer from the instrument left side of twining the brush tow then suspends to the right side, then on wire, evenly apply one deck binding agent, jump to last layer then and from the right side to the left side, twine the second layer metal silk again, then evenly apply one deck binding agent again, repeat above-mentioned action until reaching brush tow total thickness size, the number of plies of brush tow should be by its thickness decision, and wire adopts the refractory alloy wire.
Answer the axially tight power of pilot brush silk when adopting numerical control automatic winding displacement machine to twine the brush silk, control every layer of row's silk size positions simultaneously, accomplish marshalling, do not have between every layer crooked, do not have disorderlyly, guarantee that each wrapping wire fully arranges correctly.Binding agent require the volatilization time short, fill that the gap is little, viscosity is less, can make things convenient for like this and twine wire fast and can play good winding effect again, be convenient to the removing of down-stream simultaneously.
After the brush tow twines and finishes, to brush tow and be placed on the middle and clamping of two boards up and down, then by numerical control program with the mode of waterpower cutting have as requested order, regular, size ground is arranged twining the segment that the brush silk cuts into same size, each segment just becomes one group of brush silk bunch.Because the waterpower cutting belongs to the cold conditions cutting, it has no thermal distortion, joint-cutting is little, precision is high, tangent plane is bright and clean advantage, with waterpower cutting mode cutting brush tow the brush tow is split, can keep the tightness of brush silk, and during cutting the wastage of brush silk few, do not have to be out of shape, tangent plane is bright and clean.
Then process the header board and the backboard of ring, at first will according to the thickness of the size requirement finishing working drawing header board of header board and backboard and backboard and in the circle size, cylindrical and bevel for welding then should be placed with surplus, the size of finishing working drawing cylindrical again after to be welded the finishing.
After backboard and header board process, with bunch neat being arranged between header board and the backboard of brush silk, when arranging with the cylindrical of backboard as locating basis, brush silk bunch is placed on the backboard, order is arranged as requested, have angle to arrange by orientation tool, every brush silk bunch is nuzzled each other, brush silk bunch and header board, backboard outward edge tangent line should angles at 45, with glue brush silk bunch is fixed then, after treating whole circle brush silk bunch whole assembling and positioning, header board is installed is again made and install the brush silk and bunch tightly clamped by header board, backboard.Then header board and backboard are welded, when welding, one pressing plate respectively is set, deform to prevent header board in the welding process, backboard in the outside of header board and backboard.Back brush silk is finished in welding bunch can be fixed on formation brush seal circle between header board and the backboard.Then this brush seal circle can be installed in the steam seal ring corresponding grooves, and the outside of header board, backboard and steam seal ring inner circle be fixed, brush seal circle and steam seal ring are assembled into one by spot welding.
After the brush seal circle installs, can require the diameter of bore size of brush seal circle is processed, will brush silk bunch unnecessary length and excise according to the gap between rotor and the brush silk.(i.e. brush silk bunch length) is directly connected to brush silk bunch and gap between rotor because the diameter of bore size of brush seal circle, in order to make leakage rate reach minimum to play better sealing effect, must accurately process the diameter of bore size of brush seal circle, brush silk bunch is met the demands with the gap between rotor size.Excision to brush silk bunch unnecessary length can adopt the line cutting mode to carry out, and adopts the line cutting mode can reach very high precision.For the bigger brush seal circle of internal diameter, then can adopt the grinding method segmentation to carry out grinding, so also can effectively guarantee to brush the precision of silk bunch size cutting.
Owing to evenly apply one deck binding agent on every layer of wire when twining the brush tow, by binding agent every layer of wire is bonded to an integral body, the adjacent two layers wire is also adhered to one another, wire still bonds together when the brush tow is cut into brush silk bunch by waterpower after, just very convenient when brush silk bunch unnecessary length is excised like this, no matter adopt the line cutting mode still be grinding method can be in a row cut, so just can guarantee to brush the unification of silk bunch length, and can make brush silk marshalling and can not produce bending, the sealing effect of this brush steam seal is effectively improved, and then improve Efficiency of Steam Turbine.After the diameter of bore size of brush seal circle machines, only need the binding agent on the brush silk bunch is cleaned up, the making of this steam turbine brush steam seal can be finished.
More than the manufacturing process of a kind of steam turbine brush steam seal that the embodiment of the invention provided is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; part in specific embodiments and applications all can change; in sum; this description should not be construed as limitation of the present invention, and all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (6)
1. the manufacturing process of a steam turbine brush steam seal is characterized in that, it comprises the steps:
1) twine the brush tow, twine wire at the instrument higher slice that twines the brush tow, every winding one metal wire layer evenly applies one deck binding agent on wire;
The brush tow that 2) will wind cuts into several segments and forms brush silk bunch;
3) according to the header board and the backboard of size requirement processing and fabricating ring;
4) arrange brush silk bunch, will bunch neat being arranged between header board and the backboard of brush silk, brush silk bunch and header board, backboard outward edge tangent line angle at 45;
5) will brush silk bunch is welded on and forms a brush seal circle between header board and the backboard;
6) above-mentioned brush seal circle is contained in the groove of labyrinth casing;
7), will brush silk bunch unnecessary length excision according to the diameter of bore of size requirement processing brush seal circle;
8) binding agent on the cleaning brush silk bunch.
2. the manufacturing process of steam turbine brush steam seal according to claim 1 is characterized in that: in step 2) in will brush tow and cut into several segments and adopt the mode of waterpower cutting to carry out.
3. the manufacturing process of steam turbine brush steam seal according to claim 1, it is characterized in that: when step 4) brush silk bunch is arranged, with the cylindrical of backboard as locating basis, brush silk bunch is placed on the backboard, order is arranged as requested, have angle to arrange by orientation tool, every brush silk bunch is nuzzled each other, with glue brush thread bunch is fixed then, after treating whole circle brush silk bunch whole assembling and positioning, header board is installed again the brush silk that installs bunch is tightly clamped by header board, backboard.
4. the manufacturing process of steam turbine brush steam seal according to claim 1 is characterized in that: when step 5) is welded, in the outside of header board and backboard one pressing plate is set respectively, deforms to prevent header board in the welding process, backboard.
5. the manufacturing process of steam turbine brush steam seal according to claim 1 is characterized in that: bunch unnecessary length excision of brush silk adopts the mode of line cutting to carry out in step 7).
6. the manufacturing process of steam turbine brush steam seal according to claim 1 is characterized in that: bunch unnecessary length excision of brush silk adopts the mode of step grinding to carry out in step 7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102201158A CN102296994A (en) | 2011-08-03 | 2011-08-03 | Manufacturing technique for brush type steam seal for steam turbines |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102201158A CN102296994A (en) | 2011-08-03 | 2011-08-03 | Manufacturing technique for brush type steam seal for steam turbines |
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| CN102296994A true CN102296994A (en) | 2011-12-28 |
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| CN2011102201158A Pending CN102296994A (en) | 2011-08-03 | 2011-08-03 | Manufacturing technique for brush type steam seal for steam turbines |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581486A (en) * | 2012-02-06 | 2012-07-18 | 江苏透平密封高科技有限公司 | Brush seal laser penetration dotting welding method |
| CN102922121A (en) * | 2012-09-26 | 2013-02-13 | 沈阳黎明航空发动机(集团)有限责任公司 | Vacuum electron beam welding method of brush type sealing ring component |
| CN103111809A (en) * | 2013-02-06 | 2013-05-22 | 张建华 | Brush-type seal simplified manufacturing method |
| CN103394879A (en) * | 2013-08-14 | 2013-11-20 | 重庆江增船舶重工有限公司 | Lathing tool for processing steam seal of turbine and processing method for steam seal of turbine |
| CN103406739A (en) * | 2013-08-20 | 2013-11-27 | 田波 | Novel brush type seal manufacturing method |
| CN103498705A (en) * | 2013-10-18 | 2014-01-08 | 清华大学 | Low-wear brush type seal |
| CN104196577A (en) * | 2014-08-15 | 2014-12-10 | 江苏透平密封高科技有限公司 | Novel gas turbine static blade ring brush type gas seal and manufacturing method thereof |
| CN104196637A (en) * | 2014-08-15 | 2014-12-10 | 江苏透平密封高科技有限公司 | Novel air seal for combustion gas turbine tail barrel and manufacturing method for novel air seal |
| CN104234839A (en) * | 2014-08-15 | 2014-12-24 | 江苏透平密封高科技有限公司 | Brush seal for gas turbine and manufacture method of brush seal |
| CN105562885A (en) * | 2016-02-19 | 2016-05-11 | 江苏拓平密封科技有限公司 | Brush type sealing welding method based on cobalt powder seam filling and 3D printing technology |
| CN105569744A (en) * | 2016-02-19 | 2016-05-11 | 江苏拓平密封科技有限公司 | Novel brush type seal and production method thereof |
| CN114343322A (en) * | 2021-12-15 | 2022-04-15 | 中国科学院金属研究所 | Brush silk bundle sample manufacturing device capable of simulating brush silk ring structure in aircraft engine |
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| JPS61192425A (en) * | 1985-02-20 | 1986-08-27 | ロ−ルス−ロイス、パブリック、リミテッド、カンパニ− | Method and device for manufacturing brush seal |
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| CN101430007A (en) * | 2008-12-10 | 2009-05-13 | 沈阳黎明航空发动机(集团)有限责任公司 | Production method of dual-brush type sealing device |
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| JPS61192425A (en) * | 1985-02-20 | 1986-08-27 | ロ−ルス−ロイス、パブリック、リミテッド、カンパニ− | Method and device for manufacturing brush seal |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581486A (en) * | 2012-02-06 | 2012-07-18 | 江苏透平密封高科技有限公司 | Brush seal laser penetration dotting welding method |
| CN102581486B (en) * | 2012-02-06 | 2014-08-20 | 江苏透平密封高科技有限公司 | Brush seal laser penetration dotting welding method |
| CN102922121A (en) * | 2012-09-26 | 2013-02-13 | 沈阳黎明航空发动机(集团)有限责任公司 | Vacuum electron beam welding method of brush type sealing ring component |
| CN102922121B (en) * | 2012-09-26 | 2015-08-19 | 沈阳黎明航空发动机(集团)有限责任公司 | The vacuum electron beam welding method of brush seal ring assemblies |
| CN103111809B (en) * | 2013-02-06 | 2015-04-08 | 张建华 | Brush-type seal simplified manufacturing method |
| CN103111809A (en) * | 2013-02-06 | 2013-05-22 | 张建华 | Brush-type seal simplified manufacturing method |
| CN103394879A (en) * | 2013-08-14 | 2013-11-20 | 重庆江增船舶重工有限公司 | Lathing tool for processing steam seal of turbine and processing method for steam seal of turbine |
| CN103394879B (en) * | 2013-08-14 | 2015-10-21 | 重庆江增船舶重工有限公司 | Turbine steam seal processing cart instrument and processing method |
| CN103406739A (en) * | 2013-08-20 | 2013-11-27 | 田波 | Novel brush type seal manufacturing method |
| CN103498705A (en) * | 2013-10-18 | 2014-01-08 | 清华大学 | Low-wear brush type seal |
| CN104234839A (en) * | 2014-08-15 | 2014-12-24 | 江苏透平密封高科技有限公司 | Brush seal for gas turbine and manufacture method of brush seal |
| CN104196637A (en) * | 2014-08-15 | 2014-12-10 | 江苏透平密封高科技有限公司 | Novel air seal for combustion gas turbine tail barrel and manufacturing method for novel air seal |
| CN104196577A (en) * | 2014-08-15 | 2014-12-10 | 江苏透平密封高科技有限公司 | Novel gas turbine static blade ring brush type gas seal and manufacturing method thereof |
| CN105562885A (en) * | 2016-02-19 | 2016-05-11 | 江苏拓平密封科技有限公司 | Brush type sealing welding method based on cobalt powder seam filling and 3D printing technology |
| CN105569744A (en) * | 2016-02-19 | 2016-05-11 | 江苏拓平密封科技有限公司 | Novel brush type seal and production method thereof |
| CN105569744B (en) * | 2016-02-19 | 2017-02-08 | 江苏拓平密封科技有限公司 | Brush type seal and production method thereof |
| CN114343322A (en) * | 2021-12-15 | 2022-04-15 | 中国科学院金属研究所 | Brush silk bundle sample manufacturing device capable of simulating brush silk ring structure in aircraft engine |
| CN114343322B (en) * | 2021-12-15 | 2023-07-21 | 中国科学院金属研究所 | Brush filament bundle sample manufacturing device capable of simulating brush filament ring structure in aero-engine |
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Application publication date: 20111228 |