CN201943758U - Tangentially oblique honeycomb steam seal - Google Patents
Tangentially oblique honeycomb steam seal Download PDFInfo
- Publication number
- CN201943758U CN201943758U CN2010206786941U CN201020678694U CN201943758U CN 201943758 U CN201943758 U CN 201943758U CN 2010206786941 U CN2010206786941 U CN 2010206786941U CN 201020678694 U CN201020678694 U CN 201020678694U CN 201943758 U CN201943758 U CN 201943758U
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- CN
- China
- Prior art keywords
- steam
- steam seal
- honeycomb
- honeycomb steam
- turbine
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a tangentially oblique honeycomb steam seal, which comprises a steam seal body and a honeycomb steam seal block, and is characterized in that the upper portion of the steam seal body is provided with steam seal teeth and fixedly provided with the honeycomb steam seal block which is tangentially slanted along a steam turbine axial section, the honeycomb steam seal block is in a hexahedron shape, the upper end face of the honeycomb steam seal block is parallel to the shaft axis of a steam turbine shaft, the lower end face of the honeycomb steam seal block is fixedly arranged on the upper portion of the steam seal body, a steam chamber is formed between the steam seal teeth and the steam turbine shaft, four sides of the six sides of the honeycomb steam seal block are inclined planes, the inclined direction of the inclined planes is the tangential direction of the steam turbine axial section, and an inclined angle alpha is in a range from 0 degree to 30 degrees. The tangential oblique honeycomb steam seal well resolves the damping problem at the joint of a moving portion and a fixed portion of the turbine when steams move along an axial direction, thereby reducing steam leakage, and improving thermal efficiency of the steam turbine.
Description
Technical field
The utility model relates to a kind of packing, is specially adapted to steam turbine.
Background technique
At present, the Honeycomb steam seal that is installed on the steam turbine is erect type, to the mobile generation damping and amortization deficiency of steam, makes the steam leakage at the through-flow place of being association of activity and inertia of steam turbine bigger.
Summary of the invention
The purpose of this utility model is to overcome disadvantages of background technology and a kind of tangential tilt Honeycomb steam seal is provided, and it can produce big damping and amortization to the steam at the through-flow place of being association of activity and inertia of steam turbine, to reduce steam leakage, improves turbine thermodynamic efficiency.
The technical solution of the utility model is:
A kind of tangential tilt Honeycomb steam seal, it comprises: labyrinth casing, Honeycomb steam seal piece is characterized in that: the top at labyrinth casing is provided with gland sealing gear; The top of described labyrinth casing is installed with the Honeycomb steam seal piece along turbine shaft section tangential tilt; Described Honeycomb steam seal piece is a regular hexahedron, the axis parallel of its upper-end surface and turbine shaft, and the lower end surface is installed in the top of labyrinth casing; Between gland sealing gear and turbine shaft, form steam chest.
Wherein, have the four sides to be the plane of inclination in six " walls " of described Honeycomb steam seal piece, true dip direction is the tangential direction of turbine shaft section; Its inclined angle alpha is 0 °～30 °.
Described Honeycomb steam seal piece is one or more cellular structure.
The utility model can be used for the sealing at steam turbine static and dynamic sealing place, has increased the eddy current damping effect to the steam steam flow.The utility model has solved the damping of steam when axial flow that steam turbine is association of activity and inertia and is located preferably, so help reducing steam leakage, improves turbine thermodynamic efficiency.
Description of drawings
Fig. 1-1,1-2,1-3 are the structural representation of Honeycomb steam seal piece in the utility model.
Fig. 2-1, Fig. 2-2 is structural representation of the present utility model.
The legend label:
The 1-labyrinth casing; 2-Honeycomb steam seal piece; The 3-gland sealing gear; The 4-steam chest; The 5-turbine shaft.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, 2, the utility model tangential tilt Honeycomb steam seal, it comprises: labyrinth casing 1, Honeycomb steam seal piece 2, gland sealing gear 3, steam chest 4.Wherein, be provided with three gland sealing gears 3 on the top of labyrinth casing 1; Be welded with Honeycomb steam seal piece 2 on the top of labyrinth casing 1; Described Honeycomb steam seal piece 2 is a regular hexahedron, and wherein two opposites are the plane of inclination, and true dip direction is the section tangential direction of turbine shaft 5, and inclined angle alpha is 0 °～30 °; Between gland sealing gear 3 and turbine shaft 5, form steam chest 4.
When steam enters steam chest 4 by the gap between gland sealing gear 3 and the turbine shaft 5, owing to be subjected to turbine shaft rotation influence, steam and tilt angle of steam turbine axle center line generation are distributes shape, except that the small amount of steam direct-axis to directly entering next steam chest, all the other steam act on the front of Honeycomb steam seal piece 2 along curve; Because Honeycomb steam seal piece 2 is six side's solid figures, steam volumetric expansion within it also is full of whole this six sides solid space; When steam continuous action during in Honeycomb steam seal piece 2, vapor stream circles round, and forms eddy current with follow-up steam generation collision back, the flow of steam direction is played damping function, thereby reduced steam leakage, has improved turbine thermodynamic efficiency.
Claims (3)
1. tangential tilt Honeycomb steam seal, it comprises: labyrinth casing, Honeycomb steam seal piece is characterized in that: the top at labyrinth casing is provided with gland sealing gear; The top of described labyrinth casing is installed with the Honeycomb steam seal piece along turbine shaft section tangential tilt; Described Honeycomb steam seal piece is a regular hexahedron, the axis parallel of its upper-end surface and turbine shaft, and the lower end surface is installed in the top of labyrinth casing; Between gland sealing gear and turbine shaft, form steam chest.
2. tangential tilt Honeycomb steam seal according to claim 1 is characterized in that: have the four sides to be the plane of inclination in six " walls " of described Honeycomb steam seal piece, true dip direction is the tangential direction of turbine shaft section; Its inclined angle alpha is 0 °～30 °.
3. tangential tilt Honeycomb steam seal according to claim 1 is characterized in that: described Honeycomb steam seal piece is one or more cellular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206786941U CN201943758U (en) | 2010-12-14 | 2010-12-14 | Tangentially oblique honeycomb steam seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206786941U CN201943758U (en) | 2010-12-14 | 2010-12-14 | Tangentially oblique honeycomb steam seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201943758U true CN201943758U (en) | 2011-08-24 |
Family
ID=44471107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206786941U Expired - Lifetime CN201943758U (en) | 2010-12-14 | 2010-12-14 | Tangentially oblique honeycomb steam seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201943758U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213943A (en) * | 2013-05-29 | 2014-12-17 | 三菱日立电力系统株式会社 | Gas turbine |
-
2010
- 2010-12-14 CN CN2010206786941U patent/CN201943758U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213943A (en) * | 2013-05-29 | 2014-12-17 | 三菱日立电力系统株式会社 | Gas turbine |
| US9822659B2 (en) | 2013-05-29 | 2017-11-21 | Mitsubishi Hitachi Power Systems, Ltd. | Gas turbine with honeycomb seal |
| CN104213943B (en) * | 2013-05-29 | 2017-12-15 | 三菱日立电力系统株式会社 | Gas turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |