CN105863748B - A kind of high back pressure steam turbine precools tilting-pad bearing structure - Google Patents
A kind of high back pressure steam turbine precools tilting-pad bearing structure Download PDFInfo
- Publication number
- CN105863748B CN105863748B CN201610419327.1A CN201610419327A CN105863748B CN 105863748 B CN105863748 B CN 105863748B CN 201610419327 A CN201610419327 A CN 201610419327A CN 105863748 B CN105863748 B CN 105863748B
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- China
- Prior art keywords
- tilting
- bearing
- back pressure
- high back
- pad
- Prior art date
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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
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
- F01D25/125—Cooling of bearings
-
- 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
- F01D25/166—Sliding contact bearing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sliding-Contact Bearings (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention belongs to energy source and power equipment technical field, specifically related to a kind of high back pressure steam turbine precools tilting-pad bearing structure, the structure includes precooling tilting-pad bearing housing, precools tilting-type tile bearing broken tiles, screw, bearing block, oil scraper ring and high back pressure turbine rotor, high back pressure turbine rotor is installed on precooling tilting-type tile bearing broken tiles, tilting-type tile bearing broken tiles are precooled by lug and screw arrangement in being provided with the precooling tilting-pad bearing housing of horizontal flange, tilting-pad bearing housing is precooled and is fixed on bearing block；Lubricating oil is flowed into precool by the oil inlet of bearing block and be provided with annular oil groove between tilting-pad bearing housing and bearing block, is then divided into two-way, the heat for being produced for taking away spin friction all the way；Another road is used for taking away the heat that axle journal is passed to because the impeller and packing boss of high back pressure turbine rotor are in high-temperature region.Reasonable in design of the invention, it is energy-efficient, it is safe and reliable, it is to avoid bearing bush temperature is too high.
Description
Technical field
The present invention is related to and belongs to energy source and power equipment technical field, and in particular to a kind of high back pressure steam turbine precools tilting bush
Bearing arrangement.
Background technology
High back pressure steam turbine refer to initial steam pressure between 8Mpa~12MPa, back pressure of the exhaust steam pressure in 4MPa~7MPa
Steam turbine, high back pressure steam turbine is by the steam of high parameter（The standard configuration parameter of boiler）Become middle parameter steam, meet work
On the basis of skill equipment is with vapour demand, the equipment such as various pumps, blower fan, compressor and generator are driven, while substitute desuperheat subtracting
Depressor, improves energy utilization rate.Between 8~12MPa, throttle (steam) temperature is typically on 535 DEG C of left sides for high back pressure steam turbine initial steam pressure
The right side, and exhaust steam pressure is in 4~7MPa, exhaust temperature correspondingly is general more than 400 DEG C, and this allows for whole impeller of rotor
The working condition of high temperature is all in all the time.Due to the factors such as critical speed, structure and cost limitation, rotor be difficult it is long,
And hold the pressure difference that packing both sides are born larger, steam seal ring arrangement is more so that in small distance between end packing and radial journal bearing.
In addition, though end packing sets more, but pressure is drastically reduced in throttling process, and temperature change is very small, that is to say, that whole
Rotor in individual end packing is still in high-temperature region.This allows for rotor cannot be adequately cooled, and Gu Zhouchengchu is passed due to heat
The heat led and bring is more, even more than rotor rotation and the frictional heat that produces, and it is too high to be likely to result in bearing bush temperature, to height
Back pressure turbine safe operation brings hidden danger.
The content of the invention
The present invention makes up and improves above-mentioned the deficiencies in the prior art part, there is provided a kind of reasonable in design, efficiently
Energy-conservation, it is safe and reliable, a kind of too high high back pressure steam turbine of bearing bush temperature can be avoided to precool tilting-pad bearing structure, can be with
Promote on a large scale and use.
The technical solution adopted by the present invention is：A kind of high back pressure steam turbine precools tilting-pad bearing structure, the structure bag
Include precooling tilting-pad bearing housing, precool tilting-type tile bearing broken tiles, screw, bearing block, oil scraper ring and high back pressure steam turbine
Rotor, high back pressure turbine rotor is installed on precooling tilting-type tile bearing broken tiles, precools tilting-type tile bearing broken tiles by convex
Ear and screw arrangement precool tilting-pad bearing housing and fix in being provided with the precooling tilting-pad bearing housing of horizontal flange
In on bearing block.
Annular oil groove is provided between described precooling tilting-pad bearing housing and bearing block, lubricating oil is by bearing block
Oil inlet is flowed into precool and be provided with annular oil groove between tilting-pad bearing housing and bearing block, is then divided into two-way, is flowed into all the way
Precool in the gap between tilting-type tile bearing broken tiles and high back pressure turbine rotor, the heat produced for taking away spin friction
Amount；The another oilhole precooled in tilting-pad bearing housing that leads up to is flowed between cooling tilting-pad bearing housing and oil scraper ring
On high back pressure turbine rotor, impeller and packing boss for taking away due to high back pressure turbine rotor are in high-temperature region and pass
The heat of axle journal is passed, and flows into bearing block bottom, eventually pass back to petrol station.
Beneficial effects of the present invention：Reasonable in design, it is energy-efficient, it is safe and reliable, bearing bush temperature can be avoided too high,
It is easy to promote on a large scale and uses.High temperature will be in due to high back pressure impeller of steam turbine rotor and packing boss by lubricating oil
Area and the heat that passes to bearing are taken away, and realize the preliminary cooling to high back pressure turbine rotor, it is to avoid bearing bush temperature is too high,
Improve the security reliability of unit.
Brief description of the drawings：
Fig. 1 is structural representation of the invention.
Specific embodiment：
A kind of reference picture 1, high back pressure steam turbine precools tilting-pad bearing structure, and the structure includes precooling tilting bush axle
Hold housing 1, precool tilting-type tile bearing broken tiles 2, screw 3, bearing block 4, oil scraper ring 5 and high back pressure turbine rotor 6, high back pressure
Turbine rotor 6 is installed on precooling tilting-type tile bearing broken tiles 2, is precooled tilting-type tile bearing broken tiles 2 and is passed through lug and screw 3
It is arranged in the precooling tilting-pad bearing housing 1 for being provided with horizontal flange, precools tilting-pad bearing housing 1 and be fixed on bearing
On seat 4；Precool and annular oil groove is provided between tilting-pad bearing housing 1 and bearing block 4, the oil-feed that lubricating oil passes through bearing block 4
Mouth is flowed into precool and be provided with annular oil groove between tilting-pad bearing housing 1 and bearing block 4, is then divided into two-way, is flowed into all the way pre-
In gap between cooling tilting-type tile bearing broken tiles 2 and high back pressure turbine rotor 6, the heat produced for taking away spin friction
Amount；It is another lead up to the oilhole precooled in tilting-pad bearing housing 1 flow into cooling tilting-pad bearing housing 1 and oil scraper ring 5 it
Between high back pressure turbine rotor 6 on, for take away due to high back pressure turbine rotor 6 impeller and packing boss be in high temperature
Area and pass to the heat of axle journal, and flow into the bottom of bearing block 4, eventually pass back to petrol station.
High-temperature region will be in due to the impeller of high back pressure turbine rotor 6 and packing boss by lubricating oil and axle is passed to
The heat for holding is taken away, and realizes the preliminary cooling to high back pressure turbine rotor 6, it is to avoid bearing bush temperature is too high, improves unit
Security reliability.Reasonable in design of the invention, it is energy-efficient, it is safe and reliable, bearing bush temperature can be avoided too high, it is easy to
Promote on a large scale and use.
Claims (1)
1. a kind of high back pressure steam turbine precools tilting-pad bearing structure, it is characterised in that：The structure includes precooling tilting bush
Bear box（1）, precool tilting-type tile bearing broken tiles（2）, screw（3）, bearing block（4）, oil scraper ring（5）And high back pressure steam turbine
Rotor（6）, high back pressure turbine rotor（6）It is installed on precooling tilting-type tile bearing broken tiles（2）On, precool tilting-pad bearing watt
Block（2）By lug and screw（3）It is arranged in the precooling tilting-pad bearing housing for being provided with horizontal flange（1）It is interior, precool
Tilting-pad bearing housing（1）It is fixed on bearing block（4）On；Described precooling tilting-pad bearing housing（1）And bearing block（4）It
Between be provided with annular oil groove, lubricating oil passes through bearing block（4）Oil inlet flow into precool tilting-pad bearing housing（1）And bearing block
（4）Between be provided with annular oil groove, be then divided into two-way, all the way flow into precool tilting-type tile bearing broken tiles（2）With high back pressure steamer
Machine rotor（6）Between gap in, the heat produced for taking away spin friction；Separately lead up to precooling tilting-pad bearing
Housing（1）Interior oilhole flows into cooling tilting-pad bearing housing（1）And oil scraper ring（5）Between high back pressure turbine rotor（6）
On, for taking away due to high back pressure turbine rotor（6）Impeller and packing boss be in high-temperature region and pass to the heat of axle journal
Amount, and flow into bearing block（4）Bottom, eventually passes back to petrol station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610419327.1A CN105863748B (en) | 2016-06-14 | 2016-06-14 | A kind of high back pressure steam turbine precools tilting-pad bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610419327.1A CN105863748B (en) | 2016-06-14 | 2016-06-14 | A kind of high back pressure steam turbine precools tilting-pad bearing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105863748A CN105863748A (en) | 2016-08-17 |
| CN105863748B true CN105863748B (en) | 2017-06-06 |
Family
ID=56650418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610419327.1A Active CN105863748B (en) | 2016-06-14 | 2016-06-14 | A kind of high back pressure steam turbine precools tilting-pad bearing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105863748B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026185B (en) * | 2018-09-25 | 2023-11-28 | 中国船舶重工集团公司第七0三研究所 | Quick-dismantling and quick-assembling type end steam seal structure of low-parameter back pressure steam turbine |
| CN109386614B (en) * | 2018-10-18 | 2023-06-16 | 华电电力科学研究院有限公司 | Oil retainer for steam turbine and application method thereof |
| CN111884405A (en) * | 2020-07-02 | 2020-11-03 | 山东齐鲁电机制造有限公司 | Generator shaft current blocking system |
| CN114483766A (en) * | 2022-03-09 | 2022-05-13 | 中国船舶重工集团公司第七0三研究所 | Novel tilting pad supporting bearing structure with oil nozzle |
-
2016
- 2016-06-14 CN CN201610419327.1A patent/CN105863748B/en active Active
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| Publication number | Publication date |
|---|---|
| CN105863748A (en) | 2016-08-17 |
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