CN204002941U - Hide streaming brush steam seal - Google Patents
Hide streaming brush steam seal Download PDFInfo
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- CN204002941U CN204002941U CN201420416089.5U CN201420416089U CN204002941U CN 204002941 U CN204002941 U CN 204002941U CN 201420416089 U CN201420416089 U CN 201420416089U CN 204002941 U CN204002941 U CN 204002941U
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- brush
- baffle plate
- flow
- brush silk
- screening
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Abstract
The utility model discloses and hide streaming brush steam seal, comprise baffle plate and be fixed on the brush silk bunch on baffle plate, baffle plate comprises the front screen that position is oppositely arranged, backboard, between front screen and backboard, be provided with brush silk bunch, one end of brush silk bunch is fixed between front screen and backboard, the other end of brush silk bunch is the free end that protrudes from baffle plate, between front screen and backboard, be provided with the screening flow that is listed in brush silk bunch, the one end that hides flow is fixed between front screen and backboard, the other end that hides flow is the free end that protrudes from baffle plate, hiding flow free end is located at corresponding between the end of the baffle plate of brush silk bunch and a brush bunch free end.The screening streaming brush steam seal that the utility model provides, guaranteeing that it uses safe in the situation that, by laying screening flow at a brush silk bunch layer, fine rigidity and the flexible problem that has solved different-thickness brush silk bunch, seals sealing effect thereby improve brush, is worthy to be popularized.
Description
Technical field
The utility model belongs to steam turbine field of sealing technology, is specifically related to a kind of screening streaming brush steam seal.
Background technique
Brush steam seal is a kind of novel high speed dynamic sealing technology with Efficient Damping performance that developed recently gets up, because its leakage rate is only traditional broach labyrinth sealed 1/5-1/10, therefore as the flexible sealing product between sound parts on steam turbine, extensively use.
At present, the brush ring of brush steam seal is comprised of compact arranged special alloy silk, the general high-temperature alloy silk that adopts 0.05～0.12mm, brush silk bunch total thickness is 1～2mm approximately, brush silk bunch turns to into 30～60 ° of arrangements along rotor, every brush silk be exactly one end be the beam of fulcrum, there is fabulous elasticity, when they and rotor are collided mill, brush silk can elastic yield, be difficult for being worn away, guaranteed unit even safe operation under zero clearance in little gap, when even if unit is crossed critical speed of rotation and variable working condition, brush silk also can be followed axle yielding and but can not worn and not torn, after treating set steady, recover again good sealability, therefore, because making its sealability, the special structure of brush steam seal self greatly improves.But the thickness of brush silk bunch is different, also has larger difference in the sealability of brush steam seal and working life, bunch easily lodging of thinner brush silk, cannot embody the advantage of brush steam seal; And thicker brush silk bunch rigidity is strong, it is poor to make a concession, and is easily worn, and easily causes vibrations, therefore need to further study brush sealing gland.
Model utility content
In order to solve the deficiencies in the prior art, the utility model provides screening streaming brush steam seal, guaranteeing that it uses safe in the situation that, by laying screening flow at a brush silk bunch layer, fine rigidity and the flexible problem that has solved different-thickness brush silk bunch, thereby improve brush envelope sealing effect, be worthy to be popularized.
To achieve these goals, the technological scheme that the utility model adopts is:
Hide streaming brush steam seal, it is characterized in that: comprise baffle plate and be fixed on the brush silk bunch on baffle plate, described baffle plate comprises the front screen that position is oppositely arranged, backboard, between described front screen and backboard, be provided with brush silk bunch, one end of described brush silk bunch is fixed between front screen and backboard, the other end of described brush silk bunch is the free end that protrudes from baffle plate, between described front screen and backboard, be provided with the screening flow that is listed in brush silk bunch, one end of described screening flow is fixed between front screen and backboard, the other end of described screening flow is the free end that protrudes from baffle plate, hiding flow free end is located at corresponding between the end of the baffle plate of brush silk bunch and a brush bunch free end.
Aforesaid screening streaming brush steam seal, is characterized in that: the backboard of described baffle plate is provided with rear gas residual chamber.
Aforesaid screening streaming brush steam seal, is characterized in that: on described baffle plate, fixing screening flow is arranged on the brush silk bunch side near front screen.
Aforesaid screening streaming brush steam seal, is characterized in that: the front screen of described baffle plate is provided with front gas residual chamber.
Aforesaid screening streaming brush steam seal, is characterized in that: on described baffle plate, fixing screening flow is arranged on the inside of brush silk bunch.
Aforesaid screening streaming brush steam seal, is characterized in that: in described screening flow, be evenly distributed with several U-shaped mouthful, the thickness of described screening flow is 0.1mm～0.3mm.
Aforesaid screening streaming brush steam seal, is characterized in that: one end of described brush silk bunch is fixedly connected with by the mode of welding with baffle plate.
The beneficial effects of the utility model are: the screening streaming brush steam seal that the utility model provides, comprise front screen, backboard and be fixed on the brush silk bunch between front screen, backboard, and front side or centre at brush silk bunch are provided with screening flow, for thinner brush silk bunch, can improve the seal of its brush silk bunch; For thicker brush silk bunch, can effectively disperse the integral rigidity of brush silk bunch, increase its resilience effect, improve the safety in utilization of brush silk, owing to hiding, the height of aspect ratio brush silk bunch of flow is low, therefore can limit Oscillation Amplitude and the direction of brush silk, greatly extends the working life of brush silk.In addition, owing to hiding the thickness of flow, be generally 0.1mm～0.3mm, thinner, in screening flow, arrange uniform U-shaped mouthful, prevent from hiding flow in process of production because welding causes thermal accumlation, cause distortion, after opening U-shaped mouthful, can expand in a circumferential direction, be convenient to hide the orthopedic of flow simultaneously.The screening streaming brush steam seal that the utility model provides, guaranteeing that it uses safe in the situation that, by laying screening flow at a brush silk bunch layer, fine rigidity and the flexible problem that has solved different-thickness brush silk bunch, thereby improve brush envelope sealing effect, be with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is the structural representation that screening streaming brush steam seal of the present utility model is applied to steam turbine;
Fig. 2 is the structural representation of screening flow of the present utility model;
Structural representation when Fig. 3 is located at brush silk bunch front end for hiding flow;
Structural representation when Fig. 4 is located in the middle of brush silk bunch for hiding flow.
Reference character implication is as follows:
1: front screen; 11: front gas residual chamber; 2: backboard; 21: rear gas residual chamber; 3: brush silk bunch; 31: brush silk bunch free end; 4: hide flow; 41: hide flow free end; 42:U type mouth.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further introduced.
As shown in Figures 1 to 4, hide streaming brush steam seal, comprise baffle plate and be fixed on brush silk on baffle plate bunches 3, described baffle plate comprises the front screen 1 that position is oppositely arranged, backboard 2, 2 of described front screen 1 and backboards are provided with brush silk bunches 3, the both sides of brush silk bunches 3 arrange respectively front screen 1 and backboard 2, brush silk bunch 3 sides near front screen 1 are front side, brush silk bunch 3 sides near backboard 2 are rear side, one end of described brush silk bunches 3 is fixed on 2 of front screen 1 and backboards, preferably one end of brush silk bunches 3 is fixedly connected with by the mode of welding with baffle plate, be connected firmly, brush silk bunches 3 is difficult for dropping, the other end of described brush silk bunches 3 is the free end that protrudes from baffle plate, the height of brush silk bunches 3 is higher than the height of whole baffle plate, 2 of described front screen 1 and backboards are provided with the screening flow 4 that is listed in brush silk bunches 3, one end of described screening flow 4 is fixed on 2 of front screen 1 and backboards, described screening flow 4 is fixed on 2 of front screen 1 and backboards by a row silk template, the other end of described screening flow 4 is the free end that protrudes from baffle plate, hide the height of flow 4 higher than the height of whole baffle plate, hiding flow free end 41 is located at corresponding between the end of the baffle plate of brush silk bunches 3 and a brush bunch free end 31, be that height of baffle plate < hides flow height < brush silk bunch height.
The thickness that hides flow 4 is got 0.1mm～0.3mm, in the situation that the thickness≤1mm of brush silk bunches 3, the backboard 2 of baffle plate is provided with rear gas residual chamber 21, now by hiding flow 4, be arranged on brush silk bunch 3 sides near front screen 1, be about to hide the front side that flow 4 is arranged on brush silk bunches 3, hiding flow 4 diameters can be identical with broach diameter.When air-flow by time, hide flow 4 farthest barrier gas pass through, the rear gas residual chamber 21 that simultaneously arranges on backboard 2, had both increased the rebound elasticity of brush thread bunches 3, improve again steam turbine inner fluid from close property effect.
The thickness that hides flow 4 is got 0.1mm～0.3mm, in the situation that the thickness >=1mm of brush silk bunches 3, the backboard 2 of baffle plate is provided with rear gas residual chamber 21, the front screen 1 of baffle plate is provided with front gas residual chamber 11 simultaneously, now will hide flow 4 and be arranged on the middle part of brush silk bunches 3, hiding flow 4 diameters can be identical with broach diameter.For the thicker brush steam seal of brush silk bunches 3, to arrange after processing routinely, its practical stiffness is close to broach, therefore rebound elasticity is poor, is provided with and hides flow 4 in brush silk bunch 3 inside, effectively the rigidity of brush silk bunches 3 is disperseed, improve its rebound elasticity, reduce with rotor touch mill intensity; The front gas residual chamber 11, the rear gas residual chamber 21 that on front screen 1, backboard 2, arrange have respectively increased the length of brush silk bunch free end 31 simultaneously, improve the rebound elasticity of brush silk bunches 3 and fluid from close property effect.At brush silk bunches 3 thickness, when thicker, hide quantity >=1 of flow 4, specifically according to the thickness of brush silk bunches 3, determine.
Owing to hiding the thickness of flow 4, generally get 0.1mm～0.3mm, thinner thickness, appropriate uniform U-shaped mouth 42 is set in screening flow 4, effectively prevent from hiding flow 4 in process of production because weld the distortion that causes thermal accumlation and cause, after opening U-shaped mouthful 42, can expand in a circumferential direction, be convenient to orthopedic simultaneously.
The sealing principle of brush steam seal is: due to the nonuniformity effect of brush silk bunch internal pore, uniformly incoming flow enters in brush silk bunch and just becomes inhomogeneous, and from brushing closely silk bunch region to bunch region bias current of loose brush silk, these bias currents form gradually concurrent and jet between brush silk row, and produce random Secondary Flow and swirling flow.And brush closely silk bunch above when one jet runs into, will change moving direction and become the lateral flow vertical with main flow direction, it is cross flow, just because destroying to flow, brush silk bunch guarantees mobile nonuniformity, make fluid produce selfsealings effect, it is obviously the self-packing significant contribution of convection cell that lateral flow replaces flowing forward, thereby it can make flow over, the overall presure drop of brush silk bunch increases the leakage that minimizing seals.
The utility model on this basis, guarantee that brush steam seal is used in safe situation, by laying screening flow at a brush silk bunch layer, fine rigidity and the flexible problem that has solved different-thickness brush silk bunch, thereby improve brush envelope sealing effect, be with a wide range of applications.
More than show and described basic principle of the present utility model, major character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technological scheme that the mode of equivalent transformation obtains, all drops in protection domain of the present utility model.
Claims (7)
1. hide streaming brush steam seal, it is characterized in that: comprise baffle plate and be fixed on the brush silk bunch on baffle plate, described baffle plate comprises the front screen that position is oppositely arranged, backboard, between described front screen and backboard, be provided with brush silk bunch, one end of described brush silk bunch is fixed between front screen and backboard, the other end of described brush silk bunch is the free end that protrudes from baffle plate, between described front screen and backboard, be provided with the screening flow that is listed in brush silk bunch, one end of described screening flow is fixed between front screen and backboard, the other end of described screening flow is the free end that protrudes from baffle plate, hiding flow free end is located at corresponding between the end of the baffle plate of brush silk bunch and a brush bunch free end.
2. screening streaming brush steam seal according to claim 1, is characterized in that: the backboard of described baffle plate is provided with rear gas residual chamber.
3. screening streaming brush steam seal according to claim 2, is characterized in that: on described baffle plate, fixing screening flow is arranged on the brush silk bunch side near front screen.
4. screening streaming brush steam seal according to claim 2, is characterized in that: the front screen of described baffle plate is provided with front gas residual chamber.
5. screening streaming brush steam seal according to claim 4, is characterized in that: on described baffle plate, fixing screening flow is arranged on the inside of brush silk bunch.
6. according to the screening streaming brush steam seal described in claim 3 or 5, it is characterized in that: in described screening flow, be evenly distributed with several U-shaped mouthful, the thickness of described screening flow is 0.1mm～0.3mm.
7. screening streaming brush steam seal according to claim 5, is characterized in that: one end of described brush silk bunch is fixedly connected with by the mode of welding with baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420416089.5U CN204002941U (en) | 2014-07-28 | 2014-07-28 | Hide streaming brush steam seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420416089.5U CN204002941U (en) | 2014-07-28 | 2014-07-28 | Hide streaming brush steam seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002941U true CN204002941U (en) | 2014-12-10 |
Family
ID=52042960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420416089.5U Active CN204002941U (en) | 2014-07-28 | 2014-07-28 | Hide streaming brush steam seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204002941U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153826A (en) * | 2014-07-28 | 2014-11-19 | 江苏透平密封高科技有限公司 | Flow-shielding brush-type steam seal |
| CN107630721A (en) * | 2017-10-12 | 2018-01-26 | 昆明理工大学 | A kind of spliced brush seal of circumference in equal parts |
-
2014
- 2014-07-28 CN CN201420416089.5U patent/CN204002941U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153826A (en) * | 2014-07-28 | 2014-11-19 | 江苏透平密封高科技有限公司 | Flow-shielding brush-type steam seal |
| CN107630721A (en) * | 2017-10-12 | 2018-01-26 | 昆明理工大学 | A kind of spliced brush seal of circumference in equal parts |
| CN107630721B (en) * | 2017-10-12 | 2023-10-03 | 昆明理工大学 | Equal-split circumference spliced brush type seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU TURBINE SEAL HIGH-TECHNOLOGY CO., LTD. Free format text: FORMER NAME: JIANGSU TURBINE SEAL HIGH-TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 210046, Nanjing District, Jiangsu City, Qixia Province, Gan home, 108 East, Nanjing Golden Port (state) Science Park 6 Patentee after: Jiangsu Turbine Seal High-Technology Co., Ltd. Address before: 210046, Nanjing District, Jiangsu City, Qixia Province, Gan home, 108 East, Nanjing Golden Port (state) Science Park 6 Patentee before: Jiangsu Turbine Seal High-Technology Co., Ltd. |
|
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shen Xiannian Inventor after: Zuo Fei Inventor after: Fan Cuili Inventor after: Xu Yong Inventor before: Shen Xiannian Inventor before: Fan Cuili Inventor before: Xu Yong |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: SHEN XIANNIAN FAN CUILI XU YONG TO: SHEN XIANNIAN ZUO FEI FAN CUILI XU YONG |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20170515 Address after: 116600 No. 723, block B, Taihua Hotel, Dalian Free Trade Zone, Liaoning Patentee after: Dalian Free Trade Zone Huahong Industrial Technology Co., Ltd. Address before: 210046, Nanjing District, Jiangsu City, Qixia Province, Gan home, 108 East, Nanjing Golden Port (state) Science Park 6 Patentee before: Jiangsu Turbine Seal High-Technology Co., Ltd. |
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| TR01 | Transfer of patent right |