CN207470235U - A kind of steam turbine honeycomb steam seal - Google Patents
A kind of steam turbine honeycomb steam seal Download PDFInfo
- Publication number
- CN207470235U CN207470235U CN201721462301.1U CN201721462301U CN207470235U CN 207470235 U CN207470235 U CN 207470235U CN 201721462301 U CN201721462301 U CN 201721462301U CN 207470235 U CN207470235 U CN 207470235U
- Authority
- CN
- China
- Prior art keywords
- honeycomb
- packing
- steam
- steam seal
- shaft
- 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 - Fee Related
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Steam turbine provided by the utility model is equipped with 10 groups altogether with honeycomb steam seal,Wherein 6 are mounted on the high-pressure side of shaft,Residue 4 is mounted on the low tension end of shaft,Honeycomb steam seal mother unit is made of the poroid sealing ribbon, that is, packing subelement of the cellulor of the regular hexahedron of regular comb shapes,Packing subelement is welded into packing mother's unit according to the size of sealing ring by Vacuum Soldering Technology,Honeycomb steam seal ring is equipped between packing mother unit and stator sealing ring,Honeycomb steam seal ring forms one group of honeycomb steam seal with packing mother unit,When steam passes through packing,Steam can outward be flowed along the gap between shaft and Honeycomb steam seal ring and honeycomb,Since steam is per se with certain pressure,So when it is by this gap,It will strongly squeeze into honeycomb nest,And each honeycomb nest forms steam chest one by one,The direction of steam pressure can be changed and be cut under the action of these steam chests.
Description
Technical field
The utility model is related to packing field more particularly to a kind of steam turbine honeycomb steam seals.
Background technology
At present, think the big original of high-pressure steam seal air leakage mostly in the market after the investigation and calculating to Steam Turbine Field
For cause since wheelbase is shorter, original design sealing series is on the low side, and it is serrate-type steam seal that former packing, which belongs to, and broach belongs to sharp hard tooth,
In operation, gland sealing gear is easily worn, and touches after rubbing and permanent gaps is caused to increase, high steam is caused to reveal, and shaft end steam is let out
Loss accounts for the 16% of high intermediate pressure cylinder leakage loss caused by leakage, and a large amount of high-quality steams is caused to waste, make unit heat consumption higher,
The exhaust steam pressure of secondary high temperature sub-high pressure industrial steam turbine is higher, easily generates leakage vapour, makes the reduction of its efficiency, therefore for this problem
Packing is commonly installed to be sealed.
Utility model content
The utility model is intended to provide a kind of steam turbine honeycomb steam seal.
To realize the above-mentioned technical purpose, the utility model use following technical scheme, a kind of steam turbine honeycomb steam seal,
It being installed near the shaft of steam turbine, steam turbine is equipped with 10 groups altogether with honeycomb steam seal, wherein 6 are mounted on the high-pressure side of shaft,
Residue 4 is mounted on the low tension end of shaft, and the honeycomb steam seal is located on the inner surface of stator sealing ring of steam turbine, bee
Socket packing mother unit is by the poroid sealing ribbon, that is, packing subelement of the cellulor of the regular hexahedron of regular comb shapes
Form, packing subelement is welded into packing mother's unit according to the size of sealing ring by Vacuum Soldering Technology, packing mother unit with
Honeycomb steam seal ring is equipped between stator sealing ring, Honeycomb steam seal ring forms one group of honeycomb steam seal, the bee with packing mother unit
The contact surface of adjacent two segmental arc in upper and lower part of nest labyrinth ring is set there are one cylindrical spring eye, and cylindrical spring part is set on
In spring eye, adjacent segmental arc touches portion end surface of the cylindrical spring exposing outside spring eye with Honeycomb steam seal ring.
Preferably, the honeycomb steam seal subelement uses thickness thin for the Ni-based heatproofs of the Hai Site of 0.05-0.1mm
Regular hexahedron grid section bar made of plate.
Preferably, the bottom inner surface of the upper surface of the honeycomb steam seal and stator sealing ring vacate one section away from
From.
The operation principle of the utility model is when steam passes through packing, and steam can be along shaft and Honeycomb steam seal ring and bee
Gap between nest is flowed outward, since steam is per se with certain pressure, so when it is by this gap, Jiu Huiqiang
Power is squeezed into honeycomb nest, and each honeycomb nest forms steam chest one by one, and the direction of steam pressure can be in these vapour
It is changed and is cut under the action of room, while the utility model is in the upper surface of honeycomb steam seal and stator sealing ring
Lower surface vacates a distance so that a good gland steam pocket has been similarly formed between sealing ring and packing, this practicality is new
The advantages of type is Honeycomb steam seal due to having wider band, changes the low tooth number of teeth of traditional straight packing due to being limited by structure
System can only arrange seldom（General 1 ~ 2 tooth）The shortcomings that, still retain the high tooth of packing, equivalent to increase gland sealing gear quantity, increase
Resistance to flow of steam improves sealing effect, in addition, the utility model changes the yielding mode of legacy cellular packing, is moved back board-like
Spring is allowed to be changed to cylindrical spring, realizes and makes a concession under the pressure of steam, substantially increase the safety of unit operation.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become apparent and be readily appreciated that, wherein：
Fig. 1 is the schematic diagram of shaft high-pressure side setting honeycomb steam seal；
Fig. 2 is the schematic diagram of shaft low tension end setting honeycomb steam seal；
Fig. 3 is the schematic diagram of Honeycomb steam seal ring.
In figure：1st, stator sealing ring；2nd, honeycomb steam seal；3rd, Honeycomb steam seal ring；4th, spring eye.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and it is not intended that the utility model
Limitation.
In the description of the present invention, unless otherwise prescribed and limit, it should be noted that term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be the company inside mechanical connection or electrical connection or two elements
It is logical, it can be directly connected, can also be indirectly connected by intermediary.For the ordinary skill in the art, may be used
To understand the concrete meaning of above-mentioned term as the case may be.
Referring to Fig. 1 descriptions according to a kind of steam turbine honeycomb steam seal of the utility model embodiment, it is installed on vapour
Near the shaft of turbine, steam turbine is equipped with 10 groups altogether with honeycomb steam seal 2, wherein 6 are mounted on the high-pressure side of shaft, it is 4 groups remaining
Set on the low tension end of shaft, the honeycomb steam seal 2 is located on the inner surface of stator sealing ring 1 of steam turbine, cellular
Packing mother unit is made of the poroid sealing ribbon, that is, packing subelement of the cellulor of the regular hexahedron of regular comb shapes,
Packing subelement is welded into packing mother's unit according to the size of sealing ring by Vacuum Soldering Technology, and packing mother unit and stator are close
Honeycomb steam seal ring 3 is equipped between seal ring 1, Honeycomb steam seal ring 3 forms one group of honeycomb steam seal 2, the honeycomb with packing mother unit
The contact surface of adjacent two segmental arc in upper and lower part of labyrinth ring 3 is set there are one cylindrical spring eye 4, and cylindrical spring part is set on
In spring eye 4, adjacent segmental arc touches portion end surface of the cylindrical spring exposing outside spring eye 4 with Honeycomb steam seal ring 3.
Preferably, the honeycomb steam seal subelement uses thickness thin for the Ni-based heatproofs of the Hai Site of 0.05-0.1mm
Regular hexahedron grid section bar made of plate.
Preferably, the bottom inner surface of the upper surface of the honeycomb steam seal 2 and stator sealing ring 1 vacate one section away from
From.
The operation principle of the utility model is when steam passes through packing, and steam can be along shaft and Honeycomb steam seal ring and bee
Gap between nest is flowed outward, since steam is per se with certain pressure, so when it is by this gap, Jiu Huiqiang
Power is squeezed into honeycomb nest, and each honeycomb nest forms steam chest one by one, and the direction of steam pressure can be in these vapour
It is changed and is cut under the action of room, while the utility model is in the upper surface of honeycomb steam seal and stator sealing ring
Lower surface vacates a distance so that a good gland steam pocket has been similarly formed between sealing ring and packing, this practicality is new
The advantages of type is Honeycomb steam seal due to having wider band, changes the low tooth number of teeth of traditional straight packing due to being limited by structure
System can only arrange seldom（General 1 ~ 2 tooth）The shortcomings that, still retain the high tooth of packing, equivalent to increase gland sealing gear quantity, increase
Resistance to flow of steam improves sealing effect, in addition, the utility model changes the yielding mode of legacy cellular packing, is moved back board-like
Spring is allowed to be changed to cylindrical spring, realizes and makes a concession under the pressure of steam, substantially increase the safety of unit operation.
In the description of this specification, the description meaning of reference term " one embodiment ", " example " or " some examples " etc.
Refer to and be contained at least the one of the utility model with reference to the embodiment or example particular features, structures, materials, or characteristics described
In a embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment
Or example.Moreover, particular features, structures, materials, or characteristics described in any one or more embodiments or can be shown
It is combined in an appropriate manner in example.
While there has been shown and described that the embodiment of the utility model, it will be understood by those skilled in the art that：
In the case of the principle and objective for not departing from the utility model can these embodiments be carried out with a variety of variations, modification, replaced
And modification, the scope of the utility model are limited by claim and its equivalent.
Claims (3)
1. a kind of steam turbine honeycomb steam seal, is installed near the shaft of steam turbine, which is characterized in that steam turbine is cellular
Packing is equipped with 10 groups altogether, wherein 6 are mounted on the high-pressure side of shaft, residue 4 is mounted on the low tension end of shaft, the honeycomb fashion
Packing is located on the inner surface of stator sealing ring of steam turbine, honeycomb steam seal mother unit by regular comb shapes positive six face
Sealing ribbon, that is, packing subelement that the cellulor of body is poroid is formed, and packing subelement passes through vacuum according to the size of sealing ring
Soldering tech is welded into packing mother's unit, and Honeycomb steam seal ring, Honeycomb steam seal ring are equipped between packing mother unit and stator sealing ring
One group of honeycomb steam seal is formed with packing mother unit, the contact surface of adjacent two segmental arc in upper and lower part of the Honeycomb steam seal ring is set
There are one cylindrical spring eye, cylindrical spring part is set in spring eye, and cylindrical spring exposes the part end outside spring eye
Adjacent segmental arc touches with Honeycomb steam seal ring in face.
2. packing according to claim 1, which is characterized in that the honeycomb steam seal subelement use thickness for
Regular hexahedron grid section bar made of the Ni-based heatproof thin plates of Hai Site of 0.05-0.1mm.
3. packing according to claim 1, which is characterized in that the upper surface of the honeycomb steam seal and stator sealing ring
Bottom inner surface vacate a distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721462301.1U CN207470235U (en) | 2017-11-06 | 2017-11-06 | A kind of steam turbine honeycomb steam seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721462301.1U CN207470235U (en) | 2017-11-06 | 2017-11-06 | A kind of steam turbine honeycomb steam seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207470235U true CN207470235U (en) | 2018-06-08 |
Family
ID=62262506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721462301.1U Expired - Fee Related CN207470235U (en) | 2017-11-06 | 2017-11-06 | A kind of steam turbine honeycomb steam seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207470235U (en) |
-
2017
- 2017-11-06 CN CN201721462301.1U patent/CN207470235U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180608 Termination date: 20211106 |