CN110206593A - Floating can make a concession formula interstage gland - Google Patents
Floating can make a concession formula interstage gland Download PDFInfo
- Publication number
- CN110206593A CN110206593A CN201910598172.6A CN201910598172A CN110206593A CN 110206593 A CN110206593 A CN 110206593A CN 201910598172 A CN201910598172 A CN 201910598172A CN 110206593 A CN110206593 A CN 110206593A
- Authority
- CN
- China
- Prior art keywords
- packing
- make
- gland
- convex surface
- spring assembly
- 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.)
- Pending
Links
- 210000004907 gland Anatomy 0.000 title claims abstract description 36
- 238000007667 floating Methods 0.000 title claims abstract description 20
- 238000012856 packing Methods 0.000 claims abstract description 47
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000010977 unit operation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a kind of floatings can make a concession formula interstage gland, it includes guide blade carrier and two identical half gland seal structures, the guide blade carrier includes upper ring and a lower ring two parts, T shape card slot is equipped on guide blade carrier, half gland seal structure includes the packing segmental arc of spring assembly and two 1/4 arc length, it include labyrinth strip, big convex surface and small convex surface in the packing segmental arc, it is bonded in the spring assembly installation T shape card slot and with big convex surface, after the assembly is completed, spring assembly is in tension, small convex surface and the fitting of T shape card slot.The floating that the present invention obtains can make a concession formula interstage gland, it can be avoided packing and rotor mutually to scrape in unit operation, cause labyrinth strip and rotor abrasion, while the installation gap between packing and rotor can be effectively reduced, the air loss for reducing unit, improves overall efficiency.
Description
Technical field
The present invention relates to a kind of packing in steam turbine field, especially a kind of floating can make a concession formula interstage gland.
Background technique
Feed pump turbine is mainly used for driving the boiler water pump in Thermal Power Station, is the core of power station circulation system
One of center portion part, safety of the stability and reliability of operation directly concerning entire electric power station system.
To reduce the air loss between turbine rotor and stator, the operational efficiency of unit is improved, is moved inside steam turbine
Quiet adds gland seal structure.Currently, the assembly method of well known gland seal structure is to be fixed packing segmental arc using T-type card slot
It is locked on stator, and using square steel, therefore opposite cannot slide (yielding) between packing and stator, this rigid connection
It is easy to cause between packing and rotor and generates scraping, labyrinth strip damage and rotor abrasion are caused, to avoid rotor from scraping with packing
It wipes, above-mentioned gland seal structure is had in installing process between labyrinth strip and rotor, and there are biggish gaps, to cause vapour
The air loss of turbine increases, and unit efficiency reduces.
Summary of the invention
One kind is provided the purpose of the present invention is to solve above-mentioned the deficiencies in the prior art to make a concession stator relatively, kept away
The floating for exempting from packing and rotor abrasion can make a concession formula interstage gland.
To achieve the goals above, the present invention designed by floating can make a concession formula interstage gland, it include guide blade carrier and
Two identical half gland seal structures, the guide blade carrier include upper ring and a lower ring two parts, and T shape is equipped on guide blade carrier
Card slot, half gland seal structure include the packing segmental arc of spring assembly and two 1/4 arc length, include in the packing segmental arc
Labyrinth strip, big convex surface and small convex surface, the spring assembly installation T shape card slot is interior and is bonded with big convex surface, assembly completion
Afterwards, spring assembly is in tension, small convex surface and the fitting of T shape card slot.
In order to avoid spring assembly and half gland seal structure slip, influence the yielding function of packing, the packing segmental arc it is big
It carries on the back arc and is equipped with circular positioning slot, the spring assembly and circular positioning slot are coupled.
In order to facilitate the installation and replacement of spring assembly reliably, the T shape card slot is equipped with pin hole, on the spring assembly
Equipped with hook, hook is fixedly connected by straight pin with guide blade carrier.
In order to reduce the operating pressure of spring assembly, makes inside T shape card slot and on high-tension side pressure balance is to reach more preferable
Sealing effect, the packing segmental arc is equipped with balance hole, and the balance hole is located at the high-pressure side of packing.
To guarantee packing quality, after the packing is installed, gap X≤0.7mm of labyrinth strip and rotor.
A kind of floating that the present invention obtains can make a concession formula interstage gland, can be avoided packing and rotor in unit and run phase
It mutually scrapes, causes labyrinth strip and rotor abrasion, while the installation gap between packing and rotor can be effectively reduced, reduce machine
The air loss of group, improves overall efficiency.
Detailed description of the invention
Fig. 1 is the front view that present invention floating can make a concession formula interstage gland embodiment 1；
Fig. 2 is the sectional structure chart of half gland seal structure in embodiment 1；
Fig. 3 is the enlarged diagram in Fig. 1 at A；
Fig. 4 is the schematic cross-section after assembling in embodiment 1；
Fig. 5 is the balanced hole structure cross-sectional view of the invention that floats and can make a concession in formula interstage gland embodiment 2.
In figure: guide blade carrier 1, half gland seal structure 2, spring assembly 3, packing segmental arc 4, straight pin 5, labyrinth strip 6, rotor 7,
Upper ring 10, T shape card slot 12, pin hole 13, hook 30, big convex surface 40, small convex surface 41, circular positioning slot 42, is put down at lower ring 11
Weighing apparatus hole 43.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1:
The floating of the present embodiment description can make a concession formula interstage gland, as shown in Figure 1, it includes guide blade carrier 1 and two complete phases
Half same gland seal structure 2, the guide blade carrier 1 includes upper ring 10 and lower 11 two parts of ring, as shown in figure 4, on guide blade carrier 1
Equipped with T shape card slot 12, as shown in Fig. 2, half gland seal structure 2 includes the packing segmental arc of spring assembly 3 and two 1/4 arc length
4, as shown in figure 4, including labyrinth strip 6, big convex surface 40 and small convex surface 41, the spring assembly 3 in the packing segmental arc 4
It installs in T shape card slot 12 and is bonded with big convex surface 40, after the assembly is completed, spring assembly 3 is in tension, small convex surface 41
It is bonded with T shape card slot 12.
In order to avoid spring assembly 3 and half gland seal structure 2 slip, the yielding function of packing is influenced, as shown in figure 4, described
The big back arc of packing segmental arc 4 is equipped with circular positioning slot 42, and the spring assembly 3 and circular positioning slot 42 are coupled.
In order to facilitate the installation and replacement of spring assembly 3 reliably, as shown in Figure 3, Figure 4, the T shape card slot 12 is equipped with pin
Hole 13, the spring assembly 3 are equipped with hook 30, and hook 30 is fixedly connected by straight pin 5 with guide blade carrier 1.
To guarantee packing quality, as shown in figure 4, after the packing is installed, the gap X of labyrinth strip 6 and rotor 7≤
0.7mm。
In actual work, 5 fixed spring of straight pin is first used, is then sequentially divided into packing segmental arc 4 in T shape card slot 12,
After the assembly is completed, it is pressed in after spring straining in big convex surface 40, centripetal closing force is provided for packing, to make small convex surface 41
It is adjacent to the surface of T shape card slot 12；When unit operating, when colliding between packing and rotor 7, packing can overcome bullet
Spring force is made a concession, and avoids occurring to scrape and rotor 7 is caused to damage with rotor 7.
Floating provided in this embodiment can make a concession formula interstage gland, can be avoided packing and rotor 7 in unit and run phase
It mutually scrapes, causes labyrinth strip 6 and rotor 7 to wear, while the installation gap between packing and rotor 7 can be effectively reduced, reduce
The air loss of unit improves overall efficiency.
Embodiment 2:
The floating of the present embodiment description can make a concession formula interstage gland, as shown in figure 5, in addition to the feature described in the embodiment 1, in order to reduce
The operating pressure of spring assembly 3 makes 12 inside of T shape card slot and on high-tension side pressure balance to reach better seal effect, institute
Packing segmental arc 4 is stated equipped with balance hole 43, the balance hole 43 is located at the high-pressure side of packing.
In practical work process, on high-tension side steam enters T shape card slot 12, secondary spring component by balance hole 43
3 are pressed on the small convex surface 41 of packing segmental arc 4 on T shape card slot 12, so that high steam be blocked to leak to low-pressure side.
Floating provided in this embodiment can make a concession formula interstage gland, by balance hole 43, reduce the burden of spring assembly 3
Supporting force improves the interstage seal performance of packing.
Claims (7)
1. a kind of floating can make a concession formula interstage gland, it includes guide blade carrier and two identical half gland seal structures, described
Guide blade carrier includes upper ring and a lower ring two parts, T shape card slot is equipped on guide blade carrier, it is characterized in that the half gland seal structure packet
The packing segmental arc of spring assembly and two 1/4 arc length is included, includes labyrinth strip, big convex surface and small back in the packing segmental arc
Cambered surface, the spring assembly installation T shape card slot is interior and is bonded with big convex surface, and after the assembly is completed, spring assembly is in tension-like
State, small convex surface and the fitting of T shape card slot.
2. floating according to claim 1 can make a concession formula interstage gland, it is characterized in that the big convex surface of the packing segmental arc
It is equipped with circular positioning slot, the spring assembly and circular positioning slot are coupled.
3. floating according to claim 1 or 2 can make a concession formula interstage gland, it is characterized in that the T shape card slot is equipped with pin
Hole, the spring assembly are equipped with hook, and hook is fixedly connected by straight pin with guide blade carrier.
4. floating according to claim 1 or 2 can make a concession formula interstage gland, put down it is characterized in that the packing segmental arc is equipped with
Weighing apparatus hole, the balance hole are located at the high-pressure side of packing.
5. floating according to claim 3 can make a concession formula interstage gland, it is characterized in that the packing segmental arc is equipped with balance
Hole, the balance hole are located at the high-pressure side of packing.
6. floating according to claim 1 or 2 can make a concession formula interstage gland, it is characterized in that after the packing is installed,
Gap X≤0.7mm of labyrinth strip and rotor.
7. floating according to claim 3 can make a concession formula interstage gland, it is characterized in that after the packing is installed, packing
Gap X≤0.7mm of piece and rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910598172.6A CN110206593A (en) | 2019-07-04 | 2019-07-04 | Floating can make a concession formula interstage gland |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910598172.6A CN110206593A (en) | 2019-07-04 | 2019-07-04 | Floating can make a concession formula interstage gland |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110206593A true CN110206593A (en) | 2019-09-06 |
Family
ID=67796118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910598172.6A Pending CN110206593A (en) | 2019-07-04 | 2019-07-04 | Floating can make a concession formula interstage gland |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110206593A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907171A (en) * | 2009-06-02 | 2010-12-08 | 刘美琴 | Labyrinth seal |
| CN103075204A (en) * | 2013-01-25 | 2013-05-01 | 潍坊雷诺特动力设备有限公司 | Back steam seal device of steam turbine |
| CN104074558A (en) * | 2014-05-23 | 2014-10-01 | 浙江大学 | Rotary brush type gland housing |
| CN106854995A (en) * | 2015-12-09 | 2017-06-16 | 山西国峰煤电有限责任公司 | Coal gangue power generation factory turbine low pressure cylinder gland seal device |
| CN210087399U (en) * | 2019-07-04 | 2020-02-18 | 杭州汽轮机股份有限公司 | Floating concessable interstage gland seal |
-
2019
- 2019-07-04 CN CN201910598172.6A patent/CN110206593A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907171A (en) * | 2009-06-02 | 2010-12-08 | 刘美琴 | Labyrinth seal |
| CN103075204A (en) * | 2013-01-25 | 2013-05-01 | 潍坊雷诺特动力设备有限公司 | Back steam seal device of steam turbine |
| CN104074558A (en) * | 2014-05-23 | 2014-10-01 | 浙江大学 | Rotary brush type gland housing |
| CN106854995A (en) * | 2015-12-09 | 2017-06-16 | 山西国峰煤电有限责任公司 | Coal gangue power generation factory turbine low pressure cylinder gland seal device |
| CN210087399U (en) * | 2019-07-04 | 2020-02-18 | 杭州汽轮机股份有限公司 | Floating concessable interstage gland seal |
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