CN207437263U - A kind of radial direction self-compensation type sealing - Google Patents
A kind of radial direction self-compensation type sealing Download PDFInfo
- Publication number
- CN207437263U CN207437263U CN201721575873.0U CN201721575873U CN207437263U CN 207437263 U CN207437263 U CN 207437263U CN 201721575873 U CN201721575873 U CN 201721575873U CN 207437263 U CN207437263 U CN 207437263U
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- 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.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 63
- 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
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000003245 working effect Effects 0.000 claims abstract description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003643 water by type Substances 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 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
-
- 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
- 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 axial inside and outside two layers fan-shaped sealing block, every layer of sealing block is divided into six valves, sealing block is high molecular material, set axial screw extension spring on the outside of sealing block, the sealing support ring among two layers of sealing block is equipped with the through hole of 26 spindle sealing lubrications cooling clean waters.Advantageous 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 utility model 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 pressure water from rotatable parts（Refer mainly to main shaft）With consolidating
Determine to leak between component.Working seal whether can long-term safety steady operation, directly affect the safe operation of the hydraulic turbine, if
Water leakage is excessive, and head cover water level is excessively high, and unit can be caused 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
Row promotes operation and management level, and it is huge to improve the economic and social benefits effect.
Existing set main shaft sealing is this to be sealed in the previous middle low head hydropower station hydraulic turbine using material filling type radial seal
Upper extensive use, advantage are simple in structure, easy to maintain, adjust easily, and shortcoming is that initial stage water leakage is smaller, but sealing wear
Afterwards, water leakage becomes larger, and the service life of sealing is shorter.
Utility model content
The purpose of this utility model is：A kind of radial direction self-compensation type sealing is provided, it can efficiently solve turbine seal
Seepy question, while extend the service life of sealing.
The technical solution of the utility model is：Main shaft seal axle sleeve, which uses, divides two halves that conjunction is fixed on main shaft, in axle sleeve
Footpath size surveys dimensional fits with main shaft.The sealing block of main shaft work-ing seal is arranged as axial inside and outside two layers fan-shaped sealing block, often
Layer sealing block is divided into six valves, and sealing block is high molecular material, axial screw extension spring is set on the outside of sealing block, after sealing block abrasion
It can realize automatic compensation under effect of water pressure, the sealing support ring among two layers of sealing block is equipped with 2-6 main shaft seal
The through hole of lubrication clean water plays the role of lubrication and cooling when lubrication water flows between rubbing surface to sealing.
Spindle sealing lubrication cooling cleaning water pressure has 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, and be easily installed, overhauled
Sealed operating pressure is 0.6 ~ 0.8MPa.
The beneficial effects of the utility model are：Using radial direction from compensation type main shaft seal, water leakage is stable, long lifespan,
Power station maintenance and maintenance work are reduced, reduces head cover drainage pump startup frequency, reduces maintenance, maintenance cost, improves the fortune of power plant
Row returns and efficiency, and effectively improve the security of unit.With it is simple in structure, wearability is strong, small, easy for installation, work
Make sealing block trackability it is good, insensitive to unit axial float, compensation rate is big the advantages that.
Description of the drawings
Fig. 1 is the utility model structural main section view；
Fig. 2 is the utility model structural side view；
Fig. 3 is A portions partial enlarged view in Fig. 1；
Fig. 4 is B portions partial enlarged view in Fig. 1.
Specific embodiment
Embodiment 1
The utility model is described further below in conjunction with the accompanying drawings：
As shown in the figure, 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, 9 between inside and outside layer sealing block
It is axial screw extension spring.
The sealing block of main shaft work-ing seal is arranged as axial inside and outside two layers fan-shaped sealing block, and every layer of sealing block is divided into six valves,
Sealing block uses the high molecular 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, and seal unilateral radial compensation amount as 7.64mm.Sealing among two layers of sealing block
Support ring 5 is equipped 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 the role of in sealing.Spindle sealing lubrication cooling cleaning water pressure, which has 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, and be easily installed, examined
Sealed operating pressure is repaiied as 0.6 ~ 0.8MPa.
The components such as seal receptacle 3 and sealed support are manufactured using Q235B steel plates, and each component has enough stiffnesses, in machine
It will not be damaged and deform during group maintenance and handling.
The components such as all attachment bolts and pipe fitting, connector use 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, axis
It covers internal diameter size and surveys dimensional fits with main shaft；The sealing block of main shaft work-ing seal is arranged as axial inside and outside two layers fan-shaped sealing
Block, every layer of sealing block are divided into six valves, and sealing block is high molecular material, sets axial screw extension spring on the outside of sealing block, two layers close
The sealing support ring sealed among block is equipped with the through hole that 2-6 spindle sealing lubrication cools down clean water；Maintenance sealing structure form
It is 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 |
|---|---|---|---|
| CN201721575873.0U CN207437263U (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 |
|---|---|---|---|
| CN201721575873.0U CN207437263U (en) | 2017-11-23 | 2017-11-23 | A kind of radial direction self-compensation type sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207437263U true CN207437263U (en) | 2018-06-01 |
Family
ID=62286952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721575873.0U Active CN207437263U (en) | 2017-11-23 | 2017-11-23 | A kind of radial direction self-compensation type sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207437263U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842455A (en) * | 2017-11-23 | 2018-03-27 | 国家电网公司 | A kind of radial direction self-compensation type sealing |
-
2017
- 2017-11-23 CN CN201721575873.0U patent/CN207437263U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842455A (en) * | 2017-11-23 | 2018-03-27 | 国家电网公司 | A kind of radial direction self-compensation type sealing |
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