CN203948628U - The blade type sealing that is applied to the blade element of blade type sealing and comprises it - Google Patents
The blade type sealing that is applied to the blade element of blade type sealing and comprises it Download PDFInfo
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- CN203948628U CN203948628U CN201420263595.5U CN201420263595U CN203948628U CN 203948628 U CN203948628 U CN 203948628U CN 201420263595 U CN201420263595 U CN 201420263595U CN 203948628 U CN203948628 U CN 203948628U
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- blade
- type sealing
- blade element
- free end
- intermediate section
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Abstract
The purpose of this utility model is to provide the blade type sealing that is applied to the blade element of blade type sealing and comprises it, belongs to a kind of flexible sealing, once can elastic yield with Rub-impact, can obtain stable and sealability efficiently.The blade element that is applied to blade type sealing, for laminar, on its length direction, one end is fixed end, and the other end is free end, and the part in the middle of fixed end and free end is intermediate section, and free-ended width is greater than intermediate section width.The utility model is applied to the blade element of blade type sealing, simple in structure, easy to prepare; The low wearing and tearing blade type sealing that comprises it, has excellent sealing performance and stability, and radial compliance strengthens greatly, can significantly reduce wear.
Description
Technical field
The utility model relates to the low wearing and tearing blade type sealing that is applied to the blade element of blade type sealing and comprises it, is applicable to various rotating machineries.
Background technique
Sealing technique has a very important role in modern industry production and scientific technological advance.No matter be to improve scientific technological advance and industrial production technology level, or aspect technical innovation and Plant reconstruction plant modernization and renewal, sealing technique is all in occupation of consequence with bearing key player, especially the high speed motive sealing being applied on the equipment such as steam turbine, gas turbine, airplane engine is even more important, not only to its efficiency but also to its function, has material impact.
Traditionally, on these rotating machineries, apply labyrinth seal or/and brush seal.Labyrinth seal is a kind of noncontact seal, and sealability is stable, and the life-span is generally unrestricted.In order to reduce leakage, brush seal is usually used in some key position, because brush seal is a kind of contact seal, during with Rub-impact, can flexible make a concession, and flexibility is larger, and it is less that the wearing and tearing that mill causes are touched in contact.
Yet brush seal is flexible for pursuing, the general fine wire that adopts diameter 0.05～0.15mm of brush silk, this makes the axial bearing capacity of brush seal very low.In theory, increase brush filament diameter and can improve the axial bearing capacity of brush seal, but need take, to sacrifice radial compliance be cost.Therefore, can be understood as, choosing of brush filament diameter is to trade off providing between enough large axial bearing capacity and higher radial compliance.
For fear of the known shortcoming of brush seal, claimant mentions a kind of blade type sealing in the patent < < vane sealing device > > (publication number CN203258068U) having authorized, there is the radial compliance equal with brush seal, can significantly improve axial bearing capacity again.Although brush seal can strengthen axial rigidity with backboard, still cannot be applied under High Pressure Difference operating mode, under High Pressure Difference there is the problems such as " the closed effect of pressure ", " just having changed effect ", " hesitation " and brush silk fracture vertically in brush seal.The problem that above-mentioned brush seal exists, published blade type sealing technique all can solve.
Blade type sealing is also a kind of contact seal, and contact must cause wearing and tearing, although the relatively traditional labyrinth seal of this wearing and tearing is extremely low.The blade element of published blade type sealing is substantially rectangular sheet metal, and sheet metal is wider, while touching mill reaction larger at epitrochanterian unbalanced force, sheet metal narrows down, the leakage between sheet metal can increase again.Therefore, meeting on the basis of certain sealability, finding a kind of technological scheme that reduces to touch unbalanced force that mill causes, reduces wear particularly important.
Model utility content
The purpose of this utility model is to provide the low wearing and tearing blade type sealing that is applied to the blade element of blade type sealing and comprises it, belongs to a kind of flexible sealing, once can elastic yield with Rub-impact, can obtain stable and sealability efficiently.
For achieving the above object, the technical solution of the utility model is:
The blade element that is applied to blade type sealing, for laminar, on its length direction, one end is fixed end, and the other end is free end, and the part in the middle of fixed end and free end is intermediate section, and free-ended width is greater than intermediate section width.
The relative size of above-mentioned blade element fixed end width and free end and intermediate section width does not limit.Above-mentioned blade element is followed successively by free end, intermediate section and fixed end along its length, and blade element is preferably made of sheet metal.Adopt above-mentioned blade element, compare with the blade type sealing of approximate rectangular and the width blade element consistent with above-mentioned free end width, sealability and stability are suitable, but its radial compliance strengthens greatly, can significantly reduce wear.
The blade element of above-mentioned blade type sealing, thickness is 0.05～0.3mm, length is 10～30mm.Can guarantee yielding flexibility and the stability of blade element so simultaneously, guarantee its sealing effect simultaneously.
Preferably, intermediate section and free end are L-type or intermediate section and free end and are inverted T shape.Can further guarantee yielding flexibility and the stability of blade element like this.
Free end and intermediate section adopt arc transition.Can fall stress concentration like this, extend the working life of blade type sealing.
As another kind, improve, intermediate section and free end seamlessly transit, the direction from intermediate section to free end end, and width is broadening gradually.
Intermediate section minimum width is 0.5～3mm, and free end end Extreme breadth is than the wide 0.1～5mm of intermediate section minimum width.Can further guarantee yielding flexibility and the stability of blade element like this.
Comprise the above-mentioned low wearing and tearing blade type sealing that is applied to the blade element of blade type sealing, also comprise distance piece and backboard; Backboard is arranged on blade element along the downstream of blanket gas flow path direction; More than blade element has a slice, blade element one end is fixed end, and the other end is free end, and distance piece is alternate between the fixed end of blade element.
Above-mentioned blade element refers to the blade element of blade type sealing, preferably adopts welding manner to be connected and fixed between blade element and distance piece.Above-mentioned backboard is arranged on blade element along the downstream of blanket gas flow path direction, play support blade element and reduce between blade element, leak effect.During processing and fabricating, according to whether needing blade element automatically to change gap under operating conditions, determine, between backboard and blade element, whether gap is set, but no matter whether gap to be set, all need to guarantee that long-term work state lower blade element at least leans with back plate edges.
Above-mentioned distance piece is arranged on blade element fixed end, and one of its effect is to be convenient to blade element location and fixing.Along blade element length direction, above-mentioned distance piece length is less than blade element length, and preferably, blade element length is 10～30mm, and distance piece length is 2～6mm.
The free end of blade element stretches out backboard 0.3～5mm.Can further guarantee yielding flexibility and the sealability of blade element like this.
Above-mentioned blade element fixed end at least comprises the region with distance piece laminating, and free end at least comprises the region of stretching out back plate edges.
Preferably, distance piece width equates with blade element fixed end width; Free end comprises the twice region of stretching out back plate edges.
Claimant finds after deliberation, leakage between the blade element of blade type sealing occurs over just free end region, therefore only needs to guarantee free end width, makes can mutually cover gap between free end blade element, stacked close arrangement as fish scale, can guarantee the sealability of seal arrangement; And blade element intermediate section narrows down and can reduce the resistance of deflection deformation, strengthen flexiblely, and then the contact of free end and rotor while reducing to touch mill, reduces wear.
The utility model is applied to the blade element of blade type sealing, simple in structure, easy to prepare; The low wearing and tearing blade type sealing that comprises it, has excellent sealing performance and stability, and radial compliance strengthens greatly, can significantly reduce wear.
Accompanying drawing explanation
Fig. 1 is for disclosing the three-dimensional structure schematic diagram that blade type seals one group of blade element.
Fig. 2 is the three-dimensional structure schematic diagram of one group of blade element of the utility model embodiment 1.
Fig. 3 is the relative position schematic diagram of individual blade element and backboard in Fig. 2.
Fig. 4 is the external frame schematic diagram of individual blade element in Fig. 2.
Fig. 5 is the external frame schematic diagram of the utility model embodiment 2 individual blade elements.
Fig. 6 is the external frame schematic diagram of the utility model embodiment 3 individual blade elements.
Fig. 7 is the external frame schematic diagram of the utility model embodiment 4 individual blade elements.
Fig. 8 is the external frame schematic diagram of the utility model embodiment 5 individual blade elements.
In figure, 1 is approximate rectangular blade element, and 2 is distance piece, and 3 is L-type blade element, and 4 is backboard, and 31 is transition arc, and 41 is back plate edges; A is fixed end, and b is intermediate section, and c is free end.
Embodiment
Embodiment 1
The blade element that is applied to blade type sealing as shown in the figure, for laminar, on its length direction, one end is fixed end, and the other end is free end, and the part in the middle of fixed end and free end is intermediate section, and free-ended width is greater than intermediate section width; Fixed end and intermediate section and free end are L-type, and free end and intermediate section adopt arc transition.
Blade element thickness is 0.05～0.3mm; Intermediate section minimum width is 0.5～3mm, and free end end Extreme breadth is than the wide 0.1～5mm of intermediate section minimum width.
Comprise the above-mentioned low wearing and tearing blade type sealing that is applied to the blade element of blade type sealing, also comprise distance piece and backboard; Backboard is arranged on blade element along the downstream of blanket gas flow path direction; More than blade element has a slice, blade element one end is fixed end, and the other end is free end, and distance piece is alternate between the fixed end of blade element; The free end of blade element stretches out backboard 0.3～5mm; Blade element length is 10～30mm, and distance piece length is 2～6mm; Distance piece width equates with blade element fixed end width; Free end comprises the twice region of stretching out back plate edges.
Embodiment 2
Substantially the same manner as Example 1, difference is: intermediate section and free end are L-type, and fixed end, intermediate section and free end three form C font, and blade element thickness is 0.05～0.3mm; Intermediate section minimum width is 0.5～3mm, and free end end Extreme breadth is than the wide 0.1～5mm of intermediate section minimum width.The free end of blade element stretches out backboard 0.3～5mm; Blade element length is 10～30mm, and distance piece length is 2～6mm.
Embodiment 3
Substantially the same manner as Example 1, difference is: intermediate section and free end are inverted T shape, and fixed end and intermediate section are 7 fonts, and blade element thickness is 0.05～0.3mm; Intermediate section minimum width is 0.5～3mm, and free end end Extreme breadth is than the wide 0.1～5mm of intermediate section minimum width.The free end of blade element stretches out backboard 0.3～5mm; Blade element length is 10～30mm, and distance piece length is 2～6mm.
Embodiment 4
Substantially the same manner as Example 1, difference is: from fixed end bottom, to free end end, seamlessly transit the direction from intermediate section to free end end, width linearity broadening.
Embodiment 5
Substantially the same manner as Example 4, difference is: the broadening of width circular arc.
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 (10)
1. the blade element that is applied to blade type sealing, is characterized in that: for laminar, on its length direction, one end is fixed end, and the other end is free end, and the part in the middle of fixed end and free end is intermediate section, and free-ended width is greater than intermediate section width.
2. the blade element that is applied to blade type sealing as claimed in claim 1, is characterized in that: its thickness is 0.05～0.3mm, and length is 10～30mm.
3. the blade element that is applied to blade type sealing as claimed in claim 1 or 2, is characterized in that: intermediate section and free end are L-type or intermediate section and free end and are inverted T shape.
4. the blade element that is applied to blade type sealing as claimed in claim 3, is characterized in that: free end and intermediate section adopt arc transition.
5. the blade element that is applied to blade type sealing as claimed in claim 1 or 2, is characterized in that: intermediate section and free end seamlessly transit, the direction from intermediate section to free end end, and width is broadening gradually.
6. the blade element that is applied to blade type sealing as claimed in claim 1 or 2, is characterized in that: intermediate section minimum width is 0.5～3mm, and free end end Extreme breadth is than the wide 0.1～5mm of intermediate section minimum width.
7. comprise the low wearing and tearing blade type sealing of the blade element that is applied to blade type sealing described in claim 1～6 any one, it is characterized in that: also comprise distance piece and backboard; Backboard is arranged on blade element along the downstream of blanket gas flow path direction; More than blade element has a slice, blade element one end is fixed end, and the other end is free end, and distance piece is alternate between the fixed end of blade element.
8. low wearing and tearing blade type sealing as claimed in claim 7, is characterized in that: the free end of blade element stretches out backboard 0.3～5mm.
9. low wearing and tearing blade type sealing as claimed in claim 7 or 8, is characterized in that: distance piece width equates with blade element fixed end width; Free end comprises the twice region of stretching out back plate edges.
10. low wearing and tearing blade type sealing as claimed in claim 7 or 8, is characterized in that: blade element length is 10～30mm, and distance piece length is 2～6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420263595.5U CN203948628U (en) | 2014-05-21 | 2014-05-21 | The blade type sealing that is applied to the blade element of blade type sealing and comprises it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420263595.5U CN203948628U (en) | 2014-05-21 | 2014-05-21 | The blade type sealing that is applied to the blade element of blade type sealing and comprises it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203948628U true CN203948628U (en) | 2014-11-19 |
Family
ID=51890665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420263595.5U Expired - Fee Related CN203948628U (en) | 2014-05-21 | 2014-05-21 | The blade type sealing that is applied to the blade element of blade type sealing and comprises it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203948628U (en) |
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2014
- 2014-05-21 CN CN201420263595.5U patent/CN203948628U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20190521 |