CN107842455A - A kind of radial direction self-compensation type sealing - Google Patents
A kind of radial direction self-compensation type sealing Download PDFInfo
- Publication number
- CN107842455A CN107842455A CN201711177643.3A CN201711177643A CN107842455A CN 107842455 A CN107842455 A CN 107842455A CN 201711177643 A CN201711177643 A CN 201711177643A CN 107842455 A CN107842455 A CN 107842455A
- Authority
- CN
- China
- Prior art keywords
- sealing
- sealing block
- main shaft
- maintenance
- outside
- 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 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000012423 maintenance Methods 0.000 claims abstract description 13
- 238000005461 lubrication Methods 0.000 claims abstract description 10
- 230000003245 working effect Effects 0.000 claims abstract description 5
- 239000002861 polymer material Substances 0.000 claims abstract description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003643 water by type Substances 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/006—Sealing arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
- Sealing Devices (AREA)
Abstract
A kind of radial direction self-compensation type sealing, belongs to generating equipment technical field, it is characterized in that：For main shaft seal axle sleeve using dividing two halves that conjunction is fixed on main shaft, sleeve diameter size surveys dimensional fits with main shaft；The sealing block of main shaft work-ing seal is arranged as axially inside and outside two layers of fan-shaped sealing block, every layer of sealing block is divided into six valves, sealing block is high polymer material, set axial screw extension spring on the outside of sealing block, the sealing support ring among two layers of sealing block is provided with the through hole of 26 spindle sealing lubrications cooling clean waters.Beneficial effect is：Its water leakage is stable, long lifespan, reduces power station maintenance and maintenance work, reduces head cover drainage pump startup frequency, reduces maintenance, maintenance cost, improve the on-road efficiency and efficiency of power plant, and effectively improve the security of unit.
Description
Technical field
The invention belongs to generating equipment technical field.
Background technology
In water generating factory, the hydraulic turbine is one of key equipment, and hydraulic turbine main shaft sealing is the critical component of unit
One of, it is arranged between water pilot bearing and runner, to reduce or prevent press water from rotatable parts（Refer mainly to main shaft）With consolidating
Determine to leak between part.Working seal whether can long-term safety steady operation, directly affect the safe operation of the hydraulic turbine, if
Water leakage is excessive, and top cover water level is too high, can cause unit by forced-stopping machine, or even the major accident of water logging water pilot bearing occur.Cause
This main shaft work-ing seal dependable performance, stable operation can prevent the waterflooding accident potential of water pilot bearing, and power station is transported safely
OK, operation and management level is lifted, it is huge to improve the economic and social benefits effect.
Existing set main shaft sealing uses material filling type radial seal, this to be sealed in the conventional middle low head hydropower station hydraulic turbine
Upper extensive use, advantage are that simple in construction, easy to maintenance, adjustment is easy, shortcoming be initial stage water leakage it is smaller, but sealing wear
Afterwards, water leakage becomes larger, and the life-span of sealing is shorter.
The content of the invention
The purpose of the present invention is：A kind of radial direction self-compensation type sealing is provided, it can efficiently solve turbine seal leak
Problem, while extend the service life of sealing.
The technical scheme is that：Main shaft seal axle sleeve, which uses, divides two halves that conjunction is fixed on main shaft, sleeve diameter chi
It is very little to survey dimensional fits with main shaft.The sealing block of main shaft work-ing seal is arranged as axially inside and outside two layers of fan-shaped sealing block, and every layer close
Envelope block is divided into six valves, and sealing block is high polymer material, axial screw extension spring is set on the outside of sealing block, in water after sealing block abrasion
Automatic compensation can be realized under pressure effect, and the sealing support ring among two layers of sealing block is provided with 2-6 spindle sealing lubrication
The through hole of clean water is cooled down, lubrication and cooling are played a part of to sealing when lubrication water flows between rubbing surface.
Spindle sealing lubrication cooling cleaning water pressure have to be larger than the pressure for being sealed impure water, it is ensured that impure
Water will not engaging friction face, main shaft seal swivel becket and sealing block be not by sand erosion, to ensure favorable sealing property and sealing
Block has longer service life.
Maintenance sealing structure form is sealed using hollow inflatable expanding type rubber, gasket ring brace type air shroud structure, empty
It is supported on the outside of gas shroud using brass sheet gasket ring, ensures that air shroud has enough rigidity, be easily installed again, overhaul
Sealed operating pressure is 0.6 ~ 0.8MPa.
The beneficial effects of the invention are as follows：Using radial direction from compensation type main shaft seal, its water leakage is stable, long lifespan, reduces
Power station is overhauled and maintenance work, reduces head cover drainage pump startup frequency, reduces maintenance, maintenance cost, improves the operation effect of power plant
Benefit and efficiency, and effectively improve the security of unit.With simple in construction, wearability is strong, small volume, easy for installation, work is close
The advantages that trackability of envelope block is good, insensitive to unit axial float, compensation rate is big.
Brief description of the drawings
Fig. 1 is structural main section view of the present invention；
Fig. 2 is structural side view of the present invention；
Fig. 3 is A portions partial enlarged drawing in Fig. 1；
Fig. 4 is B portions partial enlarged drawing in Fig. 1.
Embodiment
Embodiment 1
The present invention is described further below in conjunction with the accompanying drawings：
As illustrated, 1 be outer layer sealing block, 2 be internal layer sealing block, 3 be seal receptacle, 4 be brass sheet gasket ring, 5 be sealing support
Ring, 6 be limbers in sealing block, 7 be fastening bolt between outer layer sealing block, 8 be fastening bolt between inside and outside layer sealing block, 9 be axle
To spiral stretching spring.
The sealing block of main shaft work-ing seal is arranged as axially inside and outside two layers of fan-shaped sealing block, every layer of sealing block and is divided into six valves,
Sealing block uses the high polymer material of import, circumferential spiral stretching spring 9 is set on the outside of sealing block, in water pressure after sealing block abrasion
Automatic compensation can be realized under effect, is computed, it is 7.64mm to seal unilateral radial compensation amount.Sealing among two layers of sealing block
Support ring 5 is provided with limbers 6 in the sealing block of several logical lubrication water, when lubrication water flows between rubbing surface pair
Lubrication and cooling are played a part of in sealing.Spindle sealing lubrication cooling cleaning water pressure, which have to be larger than, is sealed impure water
Pressure, it is ensured that impure water will not engaging friction face, main shaft seal swivel becket and sealing block are close to ensure not by sand erosion
Sealing property is good and sealing block has longer service life.
Maintenance sealing structure form is sealed using hollow inflatable expanding type rubber, gasket ring brace type air shroud structure, empty
It is supported on the outside of gas shroud using brass sheet gasket ring 4, ensures that air shroud has enough rigidity, be easily installed again, examine
It is 0.6 ~ 0.8MPa to repair sealed operating pressure.
The part such as seal receptacle 3 and sealed support is manufactured using Q235B steel plates, and each part has enough stiffnesses, in machine
It will not be damaged and deform during group maintenance and handling.
The part such as all attachment bolts and pipe fitting, joint uses stainless steel material in sealing assembling.
Claims (1)
1. a kind of radial direction self-compensation type sealing, it is characterized in that：Main shaft seal axle sleeve, which uses, divides two halves that conjunction is fixed on main shaft, axle
Cover internal diameter size and main shaft actual measurement dimensional fits；The sealing block of main shaft work-ing seal is arranged as axially inside and outside two layers fan-shaped sealing
Block, every layer of sealing block are divided into six valves, and sealing block is high polymer material, sets axial screw extension spring on the outside of sealing block, two layers close
The sealing support ring sealed among block is provided with the through hole that 2-6 spindle sealing lubrication cools down clean water；Maintenance sealing structure form
Sealed using hollow inflatable expanding type rubber, gasket ring brace type air shroud structure, brass sheet gasket ring is used on the outside of air shroud
It is supported, maintenance sealed operating pressure is 0.6 ~ 0.8MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177643.3A CN107842455A (en) | 2017-11-23 | 2017-11-23 | A kind of radial direction self-compensation type sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177643.3A CN107842455A (en) | 2017-11-23 | 2017-11-23 | A kind of radial direction self-compensation type sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107842455A true CN107842455A (en) | 2018-03-27 |
Family
ID=61679129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711177643.3A Pending CN107842455A (en) | 2017-11-23 | 2017-11-23 | A kind of radial direction self-compensation type sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107842455A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418005A (en) * | 2021-06-10 | 2021-09-21 | 湖南崇德科技股份有限公司 | High-speed shaft sealing structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB861557A (en) * | 1958-10-01 | 1961-02-22 | Sulzer Ag | Sealing means for shafts |
| CN201258816Y (en) * | 2008-08-15 | 2009-06-17 | 哈尔滨电机厂有限责任公司 | Principal axis sealing device for end-face water pressure type hydroturbine |
| CN102003325A (en) * | 2010-12-15 | 2011-04-06 | 兰州兰电电机有限公司 | Working sealing device for water turbine spindle |
| CN202451825U (en) * | 2011-12-05 | 2012-09-26 | 广东鸿源众力发电设备有限公司 | Spindle seal self-compensating type structure |
| CN204226649U (en) * | 2014-11-03 | 2015-03-25 | 德阳东航电站设备有限公司 | A kind of water turbine apex combustion seal |
| CN105464882A (en) * | 2016-01-11 | 2016-04-06 | 湖南云箭集团有限公司 | Main shaft seal device and axial flow turbine with same |
| CN105909452A (en) * | 2016-06-01 | 2016-08-31 | 华自科技股份有限公司 | Oil receiver and water turbine provided with oil receiver |
| CN106523707A (en) * | 2016-11-01 | 2017-03-22 | 天津市合润科技有限责任公司 | Mechanical sealing device |
| CN207437263U (en) * | 2017-11-23 | 2018-06-01 | 国家电网公司 | A kind of radial direction self-compensation type sealing |
-
2017
- 2017-11-23 CN CN201711177643.3A patent/CN107842455A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB861557A (en) * | 1958-10-01 | 1961-02-22 | Sulzer Ag | Sealing means for shafts |
| CN201258816Y (en) * | 2008-08-15 | 2009-06-17 | 哈尔滨电机厂有限责任公司 | Principal axis sealing device for end-face water pressure type hydroturbine |
| CN102003325A (en) * | 2010-12-15 | 2011-04-06 | 兰州兰电电机有限公司 | Working sealing device for water turbine spindle |
| CN202451825U (en) * | 2011-12-05 | 2012-09-26 | 广东鸿源众力发电设备有限公司 | Spindle seal self-compensating type structure |
| CN204226649U (en) * | 2014-11-03 | 2015-03-25 | 德阳东航电站设备有限公司 | A kind of water turbine apex combustion seal |
| CN105464882A (en) * | 2016-01-11 | 2016-04-06 | 湖南云箭集团有限公司 | Main shaft seal device and axial flow turbine with same |
| CN105909452A (en) * | 2016-06-01 | 2016-08-31 | 华自科技股份有限公司 | Oil receiver and water turbine provided with oil receiver |
| CN106523707A (en) * | 2016-11-01 | 2017-03-22 | 天津市合润科技有限责任公司 | Mechanical sealing device |
| CN207437263U (en) * | 2017-11-23 | 2018-06-01 | 国家电网公司 | A kind of radial direction self-compensation type sealing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418005A (en) * | 2021-06-10 | 2021-09-21 | 湖南崇德科技股份有限公司 | High-speed shaft sealing structure |
| CN113418005B (en) * | 2021-06-10 | 2023-12-22 | 湖南崇德科技股份有限公司 | High-speed shaft sealing structure |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180327 |
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| WD01 | Invention patent application deemed withdrawn after publication |