CN204371428U - Flexible slideway formula brush steam seal - Google Patents
Flexible slideway formula brush steam seal Download PDFInfo
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- CN204371428U CN204371428U CN201420837597.0U CN201420837597U CN204371428U CN 204371428 U CN204371428 U CN 204371428U CN 201420837597 U CN201420837597 U CN 201420837597U CN 204371428 U CN204371428 U CN 204371428U
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- clamp bar
- brush
- steam seal
- metal fibril
- slideway
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Abstract
A kind of Flexible slideway formula brush steam seal, it is characterized in that comprising front clamp bar (1), metal fibril bundle (2), rear clamp bar (3), top wire hole (5), slideway (6), labyrinth casing (7), sealing tooth (8), jackscrew (9) and brush ring (11), described brush ring (11) is by front clamp bar (1), metal fibril bundle (2) and rear clamp bar (3) composition, described Flexible slideway formula brush steam seal, formed by the labyrinth casing being more than or equal to 2 sections (7) end-to-end, every section of labyrinth casing (7) is provided with one groove near the teeth directional air inlet side position of sealing tooth (8).The brush ring (11) of Flexible slideway formula brush steam seal of the present utility model, there is the characteristic of heat-resisting quantity and low fragility, self lubricity, thermostability, sealing, high elasticity, wear resistance, oxidative stability, be applicable to the sealing of big-and-middle-sized rotor mechanical equipment to use, particularly to the effect that the rotor motive sealing of vapour favourable turn main frame has upgrading to replace.
Description
Technical field
The utility model relates to the field of sealing technology of steam turbine, gas turbine, compressor, turbine engine leaf top and shaft seal and turbo machine, air preheater etc., is a kind of Flexible slideway formula brush steam seal.
Background technique
In steam turbine operation process, between the rotor of steam turbine and stator blade, always there is certain gap, in order to prevent the loss loss of high-quality steam, normally adopting and being solved by sealing;
At present, sealing tooth on the labyrinth casing of most type is non-contacting rigid seal, when labyrinth clearance value is adjusted to less, inevitable and turbine rotor weares and teares, easily make turbine rotor bend and produce vibration, unit safety operation was affected when particularly steam turbine set starts critical, when labyrinth clearance value is adjusted to larger, packing place steam leakage can be caused again large, reduce generatine set heat efficiency, leakage loss reaches 25%-30% usually, is the main cause of steam turbine internal heat efficiency losses.
The state-of-the-art technology brush steam seal occurred in recent years can be good at solving the problem in theory, and in practical application, do not improve unit efficiency, reason is that common brush steam seal is all the wire of manual arrangement, it is uneven that the angle of wire arrangement and dimensional instability cause wire to arrange, have impact on the uniformity of brush steam seal brush ring wire bundle thickness and the conformity at angle of inclination, make brush steam seal effectively can not play the effect of sealing and have impact on the object improving unit efficiency.In addition, the welding of brush steam seal brush ring back of the body arc adopts argon arc welding, face of weld is heated uneven, cause part metals silk overheated follow the string even to burn blow, because the collision of rotor is not upspring after making a concession and part metals silk comes off in steam turbine operation process, well can not carry out the effect sealed, return unit and bring potential safety hazard.What mounting type adopted is inserted, is that installation, the gap adjustment of brush steam seal is brought very large trouble, and can not be changed especially.
Summary of the invention
The utility model is the deficiency in order to overcome above-mentioned existing packing sealing, a kind of Flexible slideway formula brush steam seal is provided, eliminate brush ring cannot change, fall silk, the problem such as nonelastic, thus farthest reduce the leakage of gas, realize energy-saving and cost-reducing, reduce the hear rate of unit, improve the thermal efficiency of unit, unit safety reliable and economic is run, reduce the expense of operating maintenance and extend unit working life, it is the sealing of applicable big-and-middle-sized favourable turn machinery, particularly steam turbine and gas turbine.
The object of this model utility is the deficiency overcoming background technique, provides a kind of Flexible slideway formula brush steam seal, under the prerequisite ensureing unit safety operation, really accomplish that minimum clearance seals, and the vibration resistance increasing rotor is conducive to the stability improving rotor.In arrangement wiry, adopt automation equipment to arrange simultaneously, improve production capacity greatly, thickness evenness and angle agreement are greatly improved.Adopt special welding mode, strictly can control welding quality, avoid following the string the potential safety hazard of even burning and blowing and bringing because of wire.Structurally adopt slide track type, for adjusting play in installation process and replacing bring very large facility.
The technical solution of the utility model is:
A kind of Flexible slideway formula brush steam seal, comprise front clamp bar 1, metal fibril bundle 2, rear clamp bar 3, top wire hole 5, slideway 6, labyrinth casing 7, sealing tooth 8, jackscrew 9 and brush ring 11, described brush ring 11 is by front clamp bar 1, metal fibril bundle 2 and rear clamp bar 3 form, described Flexible slideway formula brush steam seal, formed by labyrinth casing 7 end-to-end being more than or equal to 2 sections, every section of labyrinth casing 7 is provided with one groove near the teeth directional air inlet side position of sealing tooth 8, this groove is slideway 6, every section of labyrinth casing 7 convex surface is provided with multiple top wire hole 5 depending on labyrinth casing size, brush ring 11 slips into assembly connection from slideway (6), brush ring 11 two end part are concordant with labyrinth casing (7) end, jackscrew 9 is connected with top wire hole 5 Screw assembly, front clamp bar 1 position of brush ring 11 and rear clamp bar 3 position are near slideway 6 top.
Described front clamp bar 1 and rear clamp bar 3 are by being laser-cut into the size of height >=1.5mm, thickness >=0.5mm.
Described metal fibril bundle 2 is the metal fibril bundles 2 of the straight uniform that the metal fibril being 0.06mm ~ 0.15mm by diameter is arranged by automation row silk equipment, clamp bar 1 and rear clamp bar 3 before same one end of metal fibril bundle 2 both sides is placed also use frock by integral for three's clamping and positioning, and fix three by soldering point 4.
Described metal fibril bundle 2 and the angle between front clamp bar 1 and rear clamp bar 3 are 20 degree ~ 70 degree.
The material of described metal fibril bundle 2 is high-temperature-resistant cobalt-base alloy fine wire, and its diameter is 0.06mm ~ 0.15mm.
Advantage of the present utility model and effect are:
1, Flexible slideway formula brush steam seal of the present utility model forms brush tow by intensive thin alloying metal silk and two clamp bars form, brush tow has certain inclination angle along rotor sense of rotation, flexible contact can absorb the skew of rotor radial, and hold very much the state that meaning recovers closed, the carrying out interference fit with rotor and permanent gap will be caused to destroy as rigidity packing of short-term.Its sealing principle depends primarily on the micro-gap formed between the fine wire of dense arrangement, and these small gaps form winding raod footpath, guarantees the uncertainty of air-flow flow direction wherein, forms strong damping thus reduce to leak;
2, the brush ring of Flexible slideway formula brush steam seal of the present utility model, there is the characteristic of heat-resisting quantity and low fragility, self lubricity, thermostability, sealing, high elasticity, wear resistance, oxidative stability, be applicable to the sealing of big-and-middle-sized rotor mechanical equipment to use, particularly to the effect that the motive sealing of vapour favourable turn main frame has upgrading to replace
3, the structure of Flexible slideway formula brush steam seal of the present utility model makes that installation is convenient, seal clearance is easy to adjust, replacing is simple.Special welding makes brush tow firm, and wire not damaged also possesses original elasticity, guarantees in running efficient sealed;
4, Flexible slideway formula brush steam seal of the present utility model, wire arrangement achieves automation equipment produce, straight brush bar can be produced, sustainable production, carry out semi-finished product storage, semi-finished product reach final product size and other requirement through automation equipment when needed, improve the efficiency of brush steam seal integral production, shorten the cycle that brush steam seal finished product is produced greatly;
5, Flexible slideway formula brush steam seal of the present utility model structurally have employed slide track type, brush ring is made to be installed on labyrinth casing behind adjusting play, avoid the destruction to brush ring brush bundle when installation process and adjusting play, in addition, in the maintenance that unit operation is follow-up, conveniently can carry out the work changing brush ring.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model Flexible slideway formula brush steam seal.
Fig. 2 is the structural representation of the utility model Flexible slideway formula brush steam seal critical piece brush ring.
Fig. 3 is brush bar size and the composition schematic diagram of the utility model Flexible slideway formula brush steam seal.
Fig. 4 is the application schematic diagram of the utility model Flexible slideway formula brush steam seal.
In figure: 1 is front clamp bar; 2 is metal fibril bundle; 3 is rear clamp bar; 4 is soldering point; 5 is top wire hole; 6 is slideway; 7 is labyrinth casing; 8 is sealing tooth; 9 is jackscrew, and 10 is rotor, and 11 is brush ring.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1 to Figure 4, a kind of Flexible slideway formula brush steam seal, it is by front clamp bar (1), metal fibril bundle (2), rear clamp bar (3), top wire hole (5), slideway (6), labyrinth casing (7), sealing tooth (8), jackscrew (9) is assembled, described Flexible slideway formula brush steam seal, formed by the labyrinth casing being more than or equal to 2 sections (7) end-to-end, one groove is processed near the teeth directional air inlet side position of sealing tooth 8 at every section of labyrinth casing 7, be called slideway 6, every section of labyrinth casing 7 convex surface is provided with multiple top wire hole 5 depending on labyrinth casing arc length size, brush ring 11 is slipped into assembling from slideway 6, make brush ring 11 two end part concordant with labyrinth casing end, jackscrew 9 is screwed in top wire hole 5, make front clamp bar (1) position of brush ring 11 and rear clamp bar 3 position near slideway 6 top, brush ring 11 and the relative position sealing tooth 8 is adjusted in process, adjust rear fastening jackscrew 9, the position of fixing brush ring 11,
Described Flexible slideway formula brush steam seal critical piece brush ring 11, by front clamp bar 1, metal fibril bundle 2, rear clamp bar 3 forms, front clamp bar 1 and rear clamp bar 3 use and are laser-cut into height >=1.5mm, the size of thickness >=0.5mm, metal fibril bundle 2 is micro-wire of 0.06mm ~ 0.15mm by diameter, the metal fibril bundle 2 of straight uniform is arranged in automation row silk equipment, clamp bar 1 and rear clamp bar 3 before same one end of metal fibril bundle 2 both sides is placed also use frock by integral for three's clamping and positioning, metal fibril bundle 2 and front clamp bar 1, rear clamp bar 3 angle can become 20 degree ~ 70 degree, special welding is carried out at soldering point 4, frock is disassembled after having welded, take out the semi-finished product assemblying body welded, be called: brush bar, state becomes vertical bar brush to see Fig. 3, metal fibril bundle 2 height >=2.0mm on brush bar.Vertical bar brush bar is carried out curved arc according to the radian of gland blocks 7, and vertical bar brush bar can curve consistent with gland blocks groove radian by automatic bender equipment, and the brush bar that curved arc is good becomes brush ring 11.
Described metal fibril adopts high-temperature-resistant cobalt-base alloy fine wire, and its diameter is 0.06mm ~ 0.15mm, when diameter is 0.1mm, Experiments of Machanics tensile strength is 1358Mpa, the metal fibril bundle 2 thickness >=0.5mm of composition, highly >=2.0mm, arrangement angle can become 20 degree ~ 70 degree.
Described high-temperature-resistant cobalt-base alloy fine wire is a kind of cobalt, chromium, tungsten, nickel-base alloy silk, and this alloy has the oxidative stability of high strength and excellence, has good resistance to sulfuration and wear-resistant.Cobalt in cobalt base alloy has excellent high tenacity and low fragility, and the atomic arrangement mode of cobalt itself, cobalt is made to have extraordinary self lubricity, there is good weldability, thermostability is also fine, good weldability also ensure that metal fibril is not easy to come off after welding, chromium in cobalt base alloy has high temperature high voltage resistant performance, can ensure that metal fibril can not change properties of materials under various operating mode, nickel in cobalt base alloy improves the wear resistance of alloy, and the tungsten in cobalt base alloy then improves the fusing point of this alloy.
The metal fibril bundle 2 of brush ring 11 is regularly arranged by certain angle of inclination relative to the sense of rotation of rotor 10, the wearing and tearing to metal fibril can be reduced, make metal fibril more can adapt to foozle and the thermal distortion situation of rotor 10, simultaneously, rotor 10 moment significantly radial displacement time can make a concession rapidly and rebound, keep seal clearance constant.
When rotor 10 contacts with brush ring 11, metal fibril bundle 2 can elastic yield, and this ensures that there the operation of unit safe and effective sealing under small―gap suture even zero clearance, elastic yield also makes the friction of rotor and metal fibril become minimum.Due to the extremely close character of the metal fibril bundle 2 in brush ring 11, uniform air-flow is entered and in metal fibril bundle 2, just becomes uneven, in various states such as metal fibril bundle 2 region formation closely concurrent, jet, cross flow, eddy-currents, Secondary Flows.When air-flow run into closely metal fibril bundle 2 time, the lateral flow vertical with main air flow direction will be become in the intrafascicular change moving direction of metal fibril, air-flow body can be made to produce selfsealings effect, the overall presure drop flowing transversely through metal fibril bundle 2 can be made to increase and reduce leakage further.
The brush ring 11 of this Flexible slideway formula brush steam seal, there is the characteristic of heat-resisting quantity and low fragility, self lubricity, thermostability, sealing, high elasticity, wear resistance and oxidative stability, be applicable to the sealing of big-and-middle-sized rotor mechanical equipment to use, particularly to the effect that the rotor motive sealing of vapour favourable turn main frame has upgrading to replace.
Embodiment recited above is described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; do not departing under design concept prerequisite of the present invention; the various modification that in related domain, common engineers and technicians make technological scheme of the present invention and improvement; all should fall into protection scope of the present invention, the technology contents of request protection of the present invention is all recorded in detail in the claims.
Claims (5)
1. a Flexible slideway formula brush steam seal, it is characterized in that comprising front clamp bar (1), metal fibril bundle (2), rear clamp bar (3), top wire hole (5), slideway (6), labyrinth casing (7), sealing tooth (8), jackscrew (9) and brush ring (11), described brush ring (11) is by front clamp bar (1), metal fibril bundle (2) and rear clamp bar (3) composition, described Flexible slideway formula brush steam seal, formed by the labyrinth casing being more than or equal to 2 sections (7) end-to-end, every section of labyrinth casing (7) is provided with one groove near the teeth directional air inlet side position of sealing tooth (8), this groove is slideway (6), every section of labyrinth casing (7) convex surface is provided with multiple top wire hole (5) depending on labyrinth casing size, brush ring (11) slips into assembly connection from slideway (6), brush ring (11) two end part are concordant with labyrinth casing end, jackscrew (9) is threaded with top wire hole (5), front clamp bar (1) position of brush ring (11) and rear clamp bar (3) position are near slideway (6) top.
2. Flexible slideway formula brush steam seal according to claim 1, is characterized in that described front clamp bar (1) and rear clamp bar (3) are by being laser-cut into the size of height >=1.5mm, thickness >=0.5mm.
3. Flexible slideway formula brush steam seal according to claim 1, it is characterized in that described metal fibril bundle (2) is the metal fibril bundle of the straight uniform that the metal fibril being 0.06mm ~ 0.15mm by diameter is arranged by automation row silk equipment, clamp bar (1) and rear clamp bar (3) before same one end of metal fibril bundle (2) both sides is placed also use frock by integral for three's clamping and positioning, and pass through soldering point (4) and fix three.
4. Flexible slideway formula brush steam seal according to claim 3, is characterized in that described metal fibril bundle (2) and the angle between front clamp bar (1) and rear clamp bar (3) are 20 degree ~ 70 degree.
5. Flexible slideway formula brush steam seal according to claim 1, it is characterized in that the material of described metal fibril bundle (2) is high-temperature-resistant cobalt-base alloy fine wire, its diameter is 0.06mm ~ 0.15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420837597.0U CN204371428U (en) | 2014-12-25 | 2014-12-25 | Flexible slideway formula brush steam seal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420837597.0U CN204371428U (en) | 2014-12-25 | 2014-12-25 | Flexible slideway formula brush steam seal |
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| CN204371428U true CN204371428U (en) | 2015-06-03 |
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| CN201420837597.0U Active CN204371428U (en) | 2014-12-25 | 2014-12-25 | Flexible slideway formula brush steam seal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106194279A (en) * | 2016-08-27 | 2016-12-07 | 朱艳君 | The axially mounted brush steam seal of steam turbine |
| CN108488388A (en) * | 2018-04-27 | 2018-09-04 | 西安丁杰动力科技有限公司 | A kind of high temperature and high pressure gas surface of revolution dynamic sealing device |
| CN113074216A (en) * | 2021-04-27 | 2021-07-06 | 上海交通大学 | Supercritical shafting vibration suppression device |
-
2014
- 2014-12-25 CN CN201420837597.0U patent/CN204371428U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106194279A (en) * | 2016-08-27 | 2016-12-07 | 朱艳君 | The axially mounted brush steam seal of steam turbine |
| CN108488388A (en) * | 2018-04-27 | 2018-09-04 | 西安丁杰动力科技有限公司 | A kind of high temperature and high pressure gas surface of revolution dynamic sealing device |
| CN113074216A (en) * | 2021-04-27 | 2021-07-06 | 上海交通大学 | Supercritical shafting vibration suppression device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200119 Address after: 210000 room 708, building B2, Longgang Science Park, Hengyuan Road, Qixia District, Nanjing City, Jiangsu Province Co-patentee after: Zhu Yanjun Patentee after: Zhan Yun Address before: The water Pavilion West Jiangning District of Nanjing City, Jiangsu province 211103 No. 2 Branch Center B17 Patentee before: NANJING CHONON ENERGY-SAVING TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200402 Address after: 243100 No.15, east natural village, Shiqiao village, Shiqiao Town, Dangtu County, Ma'anshan City, Anhui Province Patentee after: Wang Shihong Address before: 210000 room 708, building B2, Longgang Science Park, Hengyuan Road, Qixia District, Nanjing City, Jiangsu Province Co-patentee before: Zhu Yanjun Patentee before: Zhan Yun |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200713 Address after: Room 708, building B2, Longgang science and Technology Park, Hengyuan Road, Nanjing Economic and Technological Development Zone, Jiangsu Province 211100 Patentee after: NANJING SULEI LASER TECHNOLOGY Co.,Ltd. Address before: No.15, east natural village, Shiqiao village street, Shiqiao Town, Dangtu County, Ma'anshan City, Anhui Province Patentee before: Wang Shihong |