CN112377277A - Push-pull rod sealing structure of steam turbine - Google Patents
Push-pull rod sealing structure of steam turbine Download PDFInfo
- Publication number
- CN112377277A CN112377277A CN202011357808.7A CN202011357808A CN112377277A CN 112377277 A CN112377277 A CN 112377277A CN 202011357808 A CN202011357808 A CN 202011357808A CN 112377277 A CN112377277 A CN 112377277A
- Authority
- CN
- China
- Prior art keywords
- push
- pull rod
- sealing
- bearing box
- sealing mechanism
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 64
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000012856 packing Methods 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 210000004907 gland Anatomy 0.000 claims abstract description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 40
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010736 steam turbine oil Substances 0.000 description 1
Images
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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
-
- 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
-
- 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
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention provides a sealing structure of a push-pull rod of a steam turbine, which comprises a push-pull rod arranged on a bearing box, a cooling sleeve arranged on the push-pull rod, a first sealing mechanism arranged between the cooling sleeve and the push-pull rod, a second sealing mechanism arranged between the push-pull rod and the bearing box, and a third sealing mechanism arranged in the bearing box, wherein an oil return pipe is arranged on the cooling sleeve, an opening of the oil return pipe is downwards connected with the bearing box, the first sealing mechanism comprises a first sealing ring and a first internal oil baffle, the first sealing mechanism is arranged between the push-pull rod and the cooling sleeve without a gap, the second sealing mechanism comprises a second sealing ring, a packing and a gland, the second sealing ring, the packing and the gland are sequentially arranged between the bearing box and the push-pull rod from inside to outside, and the third sealing mechanism comprises a second sealing ring and. The invention greatly reduces the oil leakage of the steam turbine, greatly reduces the working difficulty of workers, eliminates major potential safety hazards such as equipment fire and the like, and provides effective guarantee for the safe operation of the unit.
Description
Technical Field
The invention belongs to the technical field of a sealing structure of a steam turbine in a thermal power plant, and particularly relates to a sealing structure of a push-pull rod of the steam turbine.
Background
In the prior art, the oil leakage phenomenon occurs in the operation process of the push-pull rod sealing structure of the steam turbine, so that the obvious oil stain phenomenon occurs in the heat preservation of a valve interlayer valve and a pipeline, the unsafe phenomena of heat preservation, smoke emission and the like of a middle box of the steam turbine for many times are caused, the safe operation of a unit is greatly influenced, and the maintenance cost is increased.
Disclosure of Invention
The invention provides a push-pull rod sealing structure of a steam turbine, which reduces the oil leakage and ensures the safe operation of a unit.
The technical scheme of the invention is as follows: the utility model provides a steam turbine push-and-pull rod seal structure, includes the push-and-pull rod that sets up on the bearing box, sets up cooling sleeve on the push-and-pull rod, the sealing mechanism two between cooling sleeve and the bearing box, the bearing box internal seal mechanism three, be equipped with oil return pipe on the cooling sleeve, oil return pipe opening is connected with the bearing box downwards, sealing mechanism one includes that sealing ring, interior oil keep off one, and the zero clearance setting is between push-and-pull rod and cooling sleeve, sealing mechanism two includes sealing ring, packing gland, sealing ring, packing gland set gradually between bearing box and push-and-pull rod from inside to outside, sealing mechanism three includes that sealing ring, interior oil keep off two set up at the push-and-pull rod both ends from inside to outside.
According to the scheme, the upper portion of the bearing box is further provided with the arc-shaped oil baffle which is arranged at the joint of the push-pull rod and the bearing box, so that the sealing performance is further enhanced, oil is prevented from being sprayed to the position of the push-pull rod, and the oil leakage probability is reduced.
The third sealing mechanism further comprises a baffle reinforcing ring, wherein the baffle reinforcing ring is made of stainless steel and is sleeved and fixed outside the second inner oil retainer.
In a further aspect of the scheme, the packing is a graphite nickel wire packing.
The scheme is further, packing gland comprises the ring of one end open-ended, connects the bolt of ring opening, conveniently adjusts the elasticity.
And in a further scheme, a plurality of screw rods are symmetrically arranged outside the push-pull rod on the inner side of the bearing box, mounting holes are formed in the second inner oil retainer, and the second inner oil retainer and the push-pull rod are fixed by the screw rods through the mounting holes.
The invention has the advantages that: the invention reduces the oil leakage, greatly reduces the daily maintenance amount of the steam turbine body, saves a large amount of steam turbine oil, and achieves the purposes of energy saving and efficiency improvement; along with the elimination of the leakage point, the safe operation of the unit is effectively guaranteed, the flange pressing bolt can be tightened or loosened according to the oil leakage amount observed every day, the working difficulty of workers is greatly reduced, and the oil leakage point can be prevented and controlled; the device eliminates major potential safety hazards such as equipment fire hazards, ensures the safety of personnel, improves the health level of the equipment, ensures the long-period safe operation of the equipment, has huge indirect social benefit, and plays a good reference role for the oil leakage phenomenon of the middle tank of the same type of unit.
Drawings
FIG. 1 is a schematic structural view of a push-pull rod seal structure of a steam turbine according to the present invention;
FIG. 2 is a schematic diagram of a packing gland structure of a push-pull rod sealing structure of a steam turbine according to the present invention;
wherein: 1. the bearing box comprises a bearing box body, 2, a push-pull rod, 3, a cooling sleeve, 4, an inner oil retainer I, 5, a sealing ring, 6, a packing, 7, a packing gland, 71, a ring, 72, a bolt, 8, an oil return pipe, 9, an arc-shaped oil retainer, 10, an inner oil retainer II, 11 and a baffle reinforcing ring.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which a person skilled in the art can, without any creative effort, fully implement the present invention.
The specific implementation mode of the invention is as follows: as shown in fig. 1-2, a steam turbine push-pull rod sealing structure comprises a push-pull rod 2 arranged on a bearing box 1, a cooling sleeve 3 arranged on the push-pull rod 2, a first sealing mechanism between the cooling sleeve 3 and the push-pull rod 2, a second sealing mechanism between the push-pull rod 2 and the bearing box 1, and a third sealing mechanism inside the bearing box 1, wherein an oil return pipe 8 is arranged on the cooling sleeve 3, an opening of the oil return pipe 8 is downward connected with the bearing box 1, so that the oil return cannot be ejected upwards when the unit operates, the oil return flows into the bearing box 1 through the oil return pipe 8, the oil leakage of the push-pull rod 2 is reduced, the first sealing mechanism comprises a first sealing ring 5 and a first internal oil baffle 4, the first sealing mechanism is arranged between the push-pull rod 1 and the cooling sleeve 3 without a gap, the second sealing mechanism comprises a sealing ring 5, a packing 6 and a packing gland 7, the sealing ring 5, the packing 6 and the packing gland 7 are, the third sealing mechanism comprises a sealing ring 5 and an inner oil retainer two 10 which are arranged at two ends of the push-pull rod 2 from inside to outside.
Further, the upper portion of the bearing box 1 is provided with an arc-shaped oil stop 9 which is arranged at the joint of the push-pull rod 2 and the bearing box 1, so that the sealing performance is further enhanced, and oil is prevented from being sprayed to the push-pull rod 2, so that the oil leakage probability is reduced.
The third sealing mechanism further comprises a baffle reinforcing ring 11, wherein the baffle reinforcing ring 11 is made of stainless steel and is sleeved and fixed outside the second inner oil baffle 10.
Further, the packing 6 is a graphite nickel wire packing.
Furthermore, the packing gland 7 is composed of a ring 71 with an opening at one end and a bolt 72 connected with the opening of the ring 71, and tightness is convenient to adjust.
Furthermore, a plurality of screw rods are symmetrically arranged outside the push-pull rod 2 on the inner side of the bearing box 1, mounting holes are formed in the inner oil baffle II 10, and the screw rods penetrate through the mounting holes to fix the inner oil baffle II 10 and the push-pull rod 2.
According to the invention, an inner oil baffle 4 is additionally arranged between a cooling sleeve 1 and a sealing ring 5 according to the size of a push-pull rod 2, and an arc-shaped oil baffle 9 is additionally arranged at the upper part of a bearing box 1 to shield oil from spraying to the push-pull rod 2, so that the oil baffle effect is respectively realized on the push-pull rod 2 in the axial direction and the radial direction.
The packing 6 is additionally arranged on the outer side of the push-pull rod 2, so that the sealing effect is further improved, the packing gland 7 is manufactured to compress the packing gland, and the oil leakage amount is greatly reduced.
While the preferred embodiments of the invention have been described, it is to be understood that the invention is not limited to the precise embodiments described, and that equipment and structures not described in detail are understood to be practiced as commonly known in the art; any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention by those skilled in the art can be made without departing from the technical scope of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The sealing structure of the push-pull rod of the steam turbine is characterized by comprising a push-pull rod arranged on a bearing box, a cooling sleeve arranged on the push-pull rod, a first sealing mechanism arranged between the cooling sleeve and the push-pull rod, a second sealing mechanism arranged between the push-pull rod and the bearing box and a third sealing mechanism arranged in the bearing box, wherein an oil return pipe is arranged on the cooling sleeve, an opening of the oil return pipe is downwards connected with the bearing box, the first sealing mechanism comprises a sealing ring and a first inner oil baffle, the first sealing mechanism is arranged between the push-pull rod and the cooling sleeve in a gapless manner, the second sealing mechanism comprises a sealing ring, a packing and a packing gland, the sealing ring, the packing and the packing gland are sequentially arranged between the bearing box and the push-pull rod from inside to outside, and the third sealing mechanism comprises a sealing ring and a second inner oil.
2. The steam turbine push-pull rod sealing structure according to claim 1, wherein the upper portion of the bearing box is further provided with an arc-shaped oil stop which is arranged at the joint of the push-pull rod and the bearing box to further enhance the sealing performance and prevent oil from spraying to the push-pull rod, so that the oil leakage probability is reduced.
3. The steam turbine push-pull rod sealing structure as claimed in claim 2, wherein the third sealing mechanism further comprises a baffle reinforcing ring, and the baffle reinforcing ring is made of stainless steel and is sleeved and fixed outside the second inner oil stop.
4. The steam turbine push-pull rod seal structure of claim 3, wherein the packing is a graphite nickel wire packing.
5. The steam turbine push-pull rod sealing structure as claimed in claim 4, wherein the packing gland is composed of a ring with an opening at one end and a bolt connected with the opening of the ring, so that tightness can be conveniently adjusted.
6. The steam turbine push-pull rod sealing structure as claimed in claim 5, wherein a plurality of threaded rods are symmetrically arranged outside the push-pull rod inside the bearing box, the second inner oil retainer is provided with mounting holes, and the threaded rods penetrate through the mounting holes to fix the second inner oil retainer and the push-pull rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357808.7A CN112377277A (en) | 2020-11-27 | 2020-11-27 | Push-pull rod sealing structure of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357808.7A CN112377277A (en) | 2020-11-27 | 2020-11-27 | Push-pull rod sealing structure of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112377277A true CN112377277A (en) | 2021-02-19 |
Family
ID=74587326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011357808.7A Pending CN112377277A (en) | 2020-11-27 | 2020-11-27 | Push-pull rod sealing structure of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112377277A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2172827Y (en) * | 1993-03-20 | 1994-07-27 | 张世拥 | Anti-leak means of valve |
| CN101893129A (en) * | 2010-07-20 | 2010-11-24 | 哈尔滨电站设备成套设计研究所 | Shaft-end dynamic compensation type seal feeding valve |
| CN102559991A (en) * | 2012-03-01 | 2012-07-11 | 九源天能（北京）科技有限公司昆明分公司 | State transition device capable of achieving uninterrupted heat energy output and utilization for steelmaking converter |
| CN104089041A (en) * | 2014-07-14 | 2014-10-08 | 浙江固特气动机械有限公司 | Valve combined type sealing structure and method thereof |
| CN205207252U (en) * | 2015-12-09 | 2016-05-04 | 新昌县金维纳空调器厂 | Cooling blower axle bush sealing mechanism |
| CN208718732U (en) * | 2018-08-22 | 2019-04-09 | 国电靖远发电有限公司 | A kind of bearing box of steam turbine sealed oil catch |
| CN209084146U (en) * | 2018-11-16 | 2019-07-09 | 上海舟乐船舶钢构件有限公司 | Steam turbine main inlet throttle-stop valve in a kind of thermal power plant |
| CN110260028A (en) * | 2019-06-24 | 2019-09-20 | 中国神华煤制油化工有限公司 | A kind of anti-leak oil motor |
| CN214145590U (en) * | 2020-11-27 | 2021-09-07 | 大唐陕西发电有限公司 | Push-pull rod sealing structure of steam turbine |
-
2020
- 2020-11-27 CN CN202011357808.7A patent/CN112377277A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2172827Y (en) * | 1993-03-20 | 1994-07-27 | 张世拥 | Anti-leak means of valve |
| CN101893129A (en) * | 2010-07-20 | 2010-11-24 | 哈尔滨电站设备成套设计研究所 | Shaft-end dynamic compensation type seal feeding valve |
| CN102559991A (en) * | 2012-03-01 | 2012-07-11 | 九源天能（北京）科技有限公司昆明分公司 | State transition device capable of achieving uninterrupted heat energy output and utilization for steelmaking converter |
| CN104089041A (en) * | 2014-07-14 | 2014-10-08 | 浙江固特气动机械有限公司 | Valve combined type sealing structure and method thereof |
| CN205207252U (en) * | 2015-12-09 | 2016-05-04 | 新昌县金维纳空调器厂 | Cooling blower axle bush sealing mechanism |
| CN208718732U (en) * | 2018-08-22 | 2019-04-09 | 国电靖远发电有限公司 | A kind of bearing box of steam turbine sealed oil catch |
| CN209084146U (en) * | 2018-11-16 | 2019-07-09 | 上海舟乐船舶钢构件有限公司 | Steam turbine main inlet throttle-stop valve in a kind of thermal power plant |
| CN110260028A (en) * | 2019-06-24 | 2019-09-20 | 中国神华煤制油化工有限公司 | A kind of anti-leak oil motor |
| CN214145590U (en) * | 2020-11-27 | 2021-09-07 | 大唐陕西发电有限公司 | Push-pull rod sealing structure of steam turbine |
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