CN203978516U - Decompression chamber formula packing - Google Patents
Decompression chamber formula packing Download PDFInfo
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- CN203978516U CN203978516U CN201420373239.9U CN201420373239U CN203978516U CN 203978516 U CN203978516 U CN 203978516U CN 201420373239 U CN201420373239 U CN 201420373239U CN 203978516 U CN203978516 U CN 203978516U
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- decompression chamber
- packing
- helical teeth
- flow
- rotor
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Decompression chamber formula packing, relates to a kind of packing.The utility model is large in order to solve between rotor and packing stream pressure, causes the poor problem of sealing effect.Packing main body of the present utility model is I shape, on packing main body and rotor sides adjacent end face, be provided with high-order gland sealing gear and low level gland sealing gear, described packing main body and rotor sides adjacent end face center offer I-groove, in I-groove, be provided with decompression chamber, decompression chamber is I shape, between the sidewall of decompression chamber and the sidewall of I-groove, leave certain gap, the bottom of described decompression chamber has air-flow through hole, and described air-flow through hole is offered along the axial direction of rotor.Decompression chamber formula packing of the present utility model consumes the kinetic energy of air-flow by changing airflow direction, reduced stream pressure, thereby prevented flow leakage, reaches good sealing effect.
Description
Technical field
The utility model relates to a kind of packing, is specifically related to a kind of decompression chamber formula packing, for weakening stream pressure, reaches the sealing effect between rotor and packing, belongs to steam turbine seal device technical field.
Background technique
The working principle of tradition broach packing is to flow out by high and low tooth barrier air, weakens the effect that stream pressure reaches sealing.The less sealing effect of the broach of packing and the gap of rotor is better, and the direction of air-flow is along the axial direction operation of rotor, referring to Fig. 1 always.
The packing using now also has Honeycomb steam seal, brush steam seal etc., is all in research, how to reduce the gap of packing and rotor, reaches better sealing effect, and research staff is considering how to block air-flow, and along this direction, studies always.And the main cause that produces flow leakage is that stream pressure is excessive, how research staff does not but consider and reduces on stream pressure and study.
Model utility content
The utility model is large in order to solve between rotor and packing stream pressure, causes the poor problem of sealing effect, and then a kind of decompression chamber formula packing is provided.
The utility model in order to solve the problems of the technologies described above taked technological scheme is:
Decompression chamber formula packing described in the utility model comprises packing main body, packing main body is I shape, on packing main body and rotor sides adjacent end face, be provided with high-order gland sealing gear and low level gland sealing gear, described packing main body and rotor sides adjacent end face center offer I-groove, in I-groove, be provided with decompression chamber, decompression chamber is I shape, between the sidewall of decompression chamber and the sidewall of I-groove, leave certain gap, the bottom of described decompression chamber has air-flow through hole, and described air-flow through hole is offered along the axial direction of rotor.
Preferred: described decompression chamber formula packing also comprises gas-flow deflector, described gas-flow deflector comprises horizontally-guided plate and oriented plate, horizontally-guided plate is arranged on the lower end surface of packing main body, and leave gap between horizontally-guided plate and the lower end surface of decompression chamber, the upper end of oriented plate is connected with horizontally-guided plate, between the lower end of oriented plate and rotor, leave gap, and the angle between oriented plate and horizontally-guided plate is obtuse angle.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Preferred: described decompression chamber formula packing also comprises high helical teeth and low helical teeth, described high helical teeth is consistent with the true dip direction of oriented plate with low helical teeth, high helical teeth and low helical teeth are arranged on the lower end surface of decompression chamber, high helical teeth is adjacent with oriented plate, and leaves gap between high helical teeth and oriented plate.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Preferred: between the sidewall of decompression chamber and the sidewall of I-groove, the gap of steam admission side is 0.2mm to 2mm, between the sidewall of decompression chamber and the sidewall of I-groove, the gap of steam output side is 0.2mm to 0.5mm.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Preferred: the diameter of described air-flow through hole is 2mm to 6mm.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Preferred: the gap between described high helical teeth and oriented plate is 0.3mm to 2mm.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Preferred: between described high helical teeth and low helical teeth and rotor, leave gap, gap is 0.3mm to 0.8mm.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
The utility model compared with prior art has following effect:
Decompression chamber formula packing of the present utility model, by consuming the kinetic energy of air-flow, has reduced stream pressure, thereby has prevented flow leakage, reaches good sealing effect.And gland seal structure of the present utility model is simple, long service life.
Accompanying drawing explanation
Fig. 1 is the structural drawing of existing packing;
Fig. 2 is the structural drawing of decompression chamber formula packing;
In figure: 1 is packing main body, 2 is rotor, and 3 is high-order gland sealing gear, and 4 is low level gland sealing gear, and 5 is I-groove, 6 is decompression chamber, and 7 is air-flow through hole, and 8 is gas-flow deflector, and 9 is horizontally-guided plate, 10 is oriented plate, and 11 is high helical teeth, and 12 is low helical teeth, and in figure, arrow represents airflow direction.
Embodiment
Elaborate with reference to the accompanying drawings the utility model preferred embodiment below.
Embodiment: the packing main body 1 of present embodiment, packing main body 1 is I shape, on packing main body 1 and rotor 2 sides adjacent end faces, be provided with high-order gland sealing gear 3 and low level gland sealing gear 4, described packing main body 1 offers I-groove 5 with rotor 2 sides adjacent end face centers, in I-groove 5, be provided with decompression chamber 6, decompression chamber 6 is I shape, between the sidewall of the sidewall of decompression chamber 6 and I-groove 5, leave certain gap, the bottom of described decompression chamber 6 has air-flow through hole 7, and described air-flow through hole 7 is offered along the axial direction of rotor 2.
Further: described decompression chamber formula packing also comprises gas-flow deflector 8, described gas-flow deflector 8 comprises horizontally-guided plate 9 and oriented plate 10, horizontally-guided plate 9 is arranged on the lower end surface of packing main body 1, and leave gap between the lower end surface of horizontally-guided plate 9 and decompression chamber 6, the upper end of oriented plate 10 is connected with horizontally-guided plate 9, between the lower end of oriented plate 10 and rotor 2, leave gap, and the angle between oriented plate 10 and horizontally-guided plate 9 is obtuse angle.
Further: described decompression chamber formula packing also comprises high helical teeth 11 and low helical teeth 12, described high helical teeth 11 is consistent with the true dip direction of oriented plate 10 with low helical teeth 12, high helical teeth 11 and low helical teeth 12 are arranged on the lower end surface of decompression chamber 6, high helical teeth 11 is adjacent with oriented plate 10, and leaves gap between high helical teeth 11 and oriented plate 10.
Further: between the sidewall of decompression chamber 6 and the sidewall of I-groove 5, the gap of steam admission side is 0.2mm to 2mm, between the sidewall of decompression chamber 6 and the sidewall of I-groove 5, the gap of steam output side is 0.2mm to 0.5mm.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Further: the diameter of described air-flow through hole 7 is 2mm to 6mm.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Further: the gap between described high helical teeth 11 and oriented plate 10 is 0.3mm to 2mm.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Further: between described high helical teeth 11 and low helical teeth 12 and rotor 2, leave gap, gap is 0.3mm to 0.8mm.So arranging, is in order to change airflow direction, makes the airflow direction and the former air-flow that change form convection current, further reduces stream pressure.
Working principle of the present utility model (referring to Fig. 2):
After airflow passes decompression chamber 6, be divided into two-way air-flow, a road air-flow enters decompression chamber 6, one road air-flows and presses rotor 2 axial directions and flow; Enter the air-flow of decompression chamber 6 first along steam admission side Clearance Flow between the sidewall of decompression chamber 6 and the sidewall of I-groove 5, then the air-flow through hole 7 of flowing through, first air-flow by decompression chamber 6 flows out decompression chamber 6 along steam output side gap between the sidewall of decompression chamber 6 and the sidewall of I-groove 5 again, has realized the decompression of one-level air-flow; The air-flow that flows out decompression chamber 6 leads by gas-flow deflector 8, and meets by the mobile air-flow of rotor 2 axial directions, and the air-flow of both direction impacts mutually, has realized secondary air flow decompression; The utility model consumes by two-stage stream pressure, has reduced stream pressure, and then has realized good sealing effect.
Present embodiment is the exemplary illustration to this patent just, does not limit its protection domain, and those skilled in the art can also change its part, as long as no the Spirit Essence that exceeds this patent, all in the protection domain of this patent.
Claims (7)
1. decompression chamber formula packing, comprise packing main body (1), packing main body (1) is I shape, on packing main body (1) and rotor (2) sides adjacent end face, be provided with high-order gland sealing gear (3) and low level gland sealing gear (4), it is characterized in that: described packing main body (1) offers I-groove (5) with rotor (2) sides adjacent end face center, in I-groove (5), be provided with decompression chamber (6), decompression chamber (6) is I shape, between the sidewall of the sidewall of decompression chamber (6) and I-groove (5), leave certain gap, the bottom of described decompression chamber (6) has air-flow through hole (7), described air-flow through hole (7) is offered along the axial direction of rotor (2).
2. decompression chamber formula packing according to claim 1, it is characterized in that: described decompression chamber formula packing also comprises gas-flow deflector (8), described gas-flow deflector (8) comprises horizontally-guided plate (9) and oriented plate (10), horizontally-guided plate (9) is arranged on the lower end surface of packing main body (1), and leave gap between the lower end surface of horizontally-guided plate (9) and decompression chamber (6), the upper end of oriented plate (10) is connected with horizontally-guided plate (9), between the lower end of oriented plate (10) and rotor (2), leave gap, and the angle between oriented plate (10) and horizontally-guided plate (9) is obtuse angle.
3. decompression chamber formula packing according to claim 2, it is characterized in that: described decompression chamber formula packing also comprises high helical teeth (11) and low helical teeth (12), described high helical teeth (11) is consistent with the true dip direction of oriented plate (10) with low helical teeth (12), high helical teeth (11) and low helical teeth (12) are arranged on the lower end surface of decompression chamber (6), high helical teeth (11) is adjacent with oriented plate (10), and leaves gap between high helical teeth (11) and oriented plate (10).
4. decompression chamber formula packing according to claim 3, it is characterized in that: between the sidewall of decompression chamber (6) and the sidewall of I-groove (5), the gap of steam admission side is 0.2mm to 2mm, between the sidewall of decompression chamber (6) and the sidewall of I-groove (5), the gap of steam output side is 0.2mm to 0.5mm.
5. decompression chamber formula packing according to claim 4, is characterized in that: the diameter of described air-flow through hole (7) is 2mm to 6mm.
6. decompression chamber formula packing according to claim 5, is characterized in that: the gap between described high helical teeth (11) and oriented plate (10) is 0.3mm to 2mm.
7. decompression chamber formula packing according to claim 6, is characterized in that: between described high helical teeth (11) and low helical teeth (12) and rotor (2), leave gap, gap is 0.3mm to 0.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420373239.9U CN203978516U (en) | 2014-04-25 | 2014-07-08 | Decompression chamber formula packing |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205149.9 | 2014-04-25 | ||
| CN201420205149 | 2014-04-25 | ||
| CN201420373239.9U CN203978516U (en) | 2014-04-25 | 2014-07-08 | Decompression chamber formula packing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203978516U true CN203978516U (en) | 2014-12-03 |
Family
ID=51596122
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420373239.9U Active CN203978516U (en) | 2014-04-25 | 2014-07-08 | Decompression chamber formula packing |
| CN201410321473.1A Pending CN104074557A (en) | 2014-04-25 | 2014-07-08 | Serrate-type steam seal with decompression chamber |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410321473.1A Pending CN104074557A (en) | 2014-04-25 | 2014-07-08 | Serrate-type steam seal with decompression chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN203978516U (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1338213A (en) * | 1961-11-08 | 1963-09-20 | Licentia Gmbh | Non-contact sealing system for turbo-machine shaft |
| GB1224234A (en) * | 1968-07-19 | 1971-03-03 | English Electric Co Ltd | Turbines |
| JPS61108808A (en) * | 1984-11-01 | 1986-05-27 | Hitachi Ltd | Sealing structure of bearing |
| EP1942294A1 (en) * | 2007-01-02 | 2008-07-09 | Siemens Aktiengesellschaft | Sealing device for a turbine |
| GB2480680B (en) * | 2010-05-28 | 2012-10-03 | Alstom Technology Ltd | Labyrinth seal |
-
2014
- 2014-07-08 CN CN201420373239.9U patent/CN203978516U/en active Active
- 2014-07-08 CN CN201410321473.1A patent/CN104074557A/en active Pending
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| Publication number | Publication date |
|---|---|
| CN104074557A (en) | 2014-10-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |