CN105863748A - Precooling tilting-pad bearing structure of high back-pressure turbine - Google Patents
Precooling tilting-pad bearing structure of high back-pressure turbine Download PDFInfo
- Publication number
- CN105863748A CN105863748A CN201610419327.1A CN201610419327A CN105863748A CN 105863748 A CN105863748 A CN 105863748A CN 201610419327 A CN201610419327 A CN 201610419327A CN 105863748 A CN105863748 A CN 105863748A
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- CN
- China
- Prior art keywords
- tilting
- precooling
- pad
- bearing
- high back
- 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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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
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- 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
Abstract
The invention belongs to the technical field of energy power equipment, in particular to a precooling tilting-pad bearing structure of a high back-pressure turbine. The precooling tilting-pad bearing structure structurally comprises a precooling tilting-pad bearing shell, a precooling tilting-pad bearing pad, a screw, a bearing block, an oil retainer and a high back-pressure turbine rotor, the high back-pressure turbine rotor is mounted on the precooling tilting-pad bearing pad which is arranged in the precooling tilting-pad bearing shell provided with a horizontal split through a lug and the screw, and the precooling tilting-pad bearing shell is fixed on the bearing block; lubricating oil flows into an annular oil groove arranged between the precooling tilting-pad bearing shell and the bearing block through an oil inlet of the bearing block prior to being divided into two paths, one path is used for carrying off heat generated from spin friction, and the other path is used for carrying away heat transferred to the shaft neck due to the fact that an impeller and a sealing convex platform of the high back-pressure turbine rotor are located in a high-temperature region. The precooling tilting-pad bearing structure is reasonable in structural design, energy-efficient and safe and reliable, and excess temperature of the bearing pad is avoided.
Description
Technical field
The present invention relates to and belongs to energy source and power equipment technical field, is specifically related to a kind of high back pressure steam turbine and precools tilting-pad bearing structure.
Background technology
High back pressure steam turbine refers to that initial steam pressure is between 8Mpa～12MPa, exhaust steam pressure is at the back pressure turbine of 4MPa～7MPa, the steam (standard configuration parameter of boiler) of high parameter is become middle parameter steam by high back pressure steam turbine, on the basis of meeting process equipment vapour demand, drive the equipment such as various pump, blower fan, compressor and electromotor, substitute temperature-decreased pressure reducer simultaneously, improve energy utilization rate.High back pressure steam turbine initial steam pressure is between 8～12MPa, and throttle (steam) temperature is typically at about 535 DEG C, and exhaust steam pressure is 4～7MPa, and exhaust temperature correspondingly is typically more than 400 DEG C, and this allows for whole impeller of rotor and is in the duty of high temperature the most all the time.Owing to the factors such as critical speed, structure and cost limit, rotor is difficult to long, and the pressure reduction holding packing both sides to bear is relatively big, and steam seal ring is arranged more so that end packing is less with the spacing of radial journal bearing.Although it addition, end packing arranges more, but pressure drastically reduces in throttling process, variations in temperature is the least, say, that the rotor in whole end packing is still in high-temperature region.This allows for rotor and cannot be adequately cooled, and the heat that Gu Zhouchengchu brings due to conduction of heat is more, and even more than rotor rotates and the frictional heat that produces, is likely to result in bearing bush temperature too high, runs to high back pressure Turbine Safety and brings hidden danger.
Summary of the invention
In place of the present invention makes up and improves above-mentioned the deficiencies in the prior art, provide a kind of reasonable in design, energy-efficient, safe and reliable it can be avoided that the too high a kind of high back pressure steam turbine of bearing bush temperature precools tilting-pad bearing structure, can promote on a large scale and use.
The technical solution used in the present invention is: a kind of high back pressure steam turbine precools tilting-pad bearing structure, this structure includes precooling tilting-pad bearing housing, precooling 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, precool tilting-type tile bearing broken tiles by lug and screw arrangement in the precooling tilting-pad bearing housing being provided with horizontal flange, precool tilting-pad bearing housing and be fixed on bearing block.
It is provided with annular oil groove between described precooling tilting-pad bearing housing and bearing block, lubricating oil is flowed into by the oil-in of bearing block to precool and is provided with annular oil groove between tilting-pad bearing housing and bearing block, it is then divided into two-way, one road flows in the gap precooled between tilting-type tile bearing broken tiles and high back pressure turbine rotor, the heat produced for taking away spin friction；The oilhole precooled in tilting-pad bearing housing of separately leading up to flows on the high back pressure turbine rotor between cooling tilting-pad bearing housing and oil scraper ring, it is used for taking away owing to impeller and the packing boss of high back pressure turbine rotor are in high-temperature region and pass to the heat of axle journal, and flow into bearing block bottom, eventually pass back to petrol station.
Beneficial effects of the present invention: reasonable in design, energy-efficient, safe and reliable, it is possible to avoid bearing bush temperature too high, it is easy to promote on a large scale and use.By lubricating oil, the heat passing to bearing owing to high back pressure impeller of steam turbine rotor and packing boss are in high-temperature region is taken away, it is achieved that the preliminary cooling to high back pressure turbine rotor, it is to avoid bearing bush temperature is too high, improves the security reliability of unit.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention:
With reference to Fig. 1, a kind of high back pressure steam turbine precools tilting-pad bearing structure, this structure includes precooling tilting-pad bearing housing 1, precooling 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, precool tilting-type tile bearing broken tiles 2 to be arranged in the precooling tilting-pad bearing housing 1 being provided with horizontal flange by lug and screw 3, precool tilting-pad bearing housing 1 and be fixed on bearing block 4；Precool and be provided with annular oil groove between tilting-pad bearing housing 1 and bearing block 4, lubricating oil is flowed into by the oil-in of bearing block 4 to precool and is provided with annular oil groove between tilting-pad bearing housing 1 and bearing block 4, it is then divided into two-way, one road flows in the gap precooled between tilting-type tile bearing broken tiles 2 and high back pressure turbine rotor 6, the heat produced for taking away spin friction；The oilhole precooled in tilting-pad bearing housing 1 of separately leading up to flows on the high back pressure turbine rotor 6 between cooling tilting-pad bearing housing 1 and oil scraper ring 5, it is used for taking away owing to impeller and the packing boss of high back pressure turbine rotor 6 are in high-temperature region and pass to the heat of axle journal, and flow into bearing block 4 bottom, eventually pass back to petrol station.
By lubricating oil, the heat passing to bearing owing to the impeller of high back pressure turbine rotor 6 and packing boss are in high-temperature region is taken away, it is achieved that the preliminary cooling to high back pressure turbine rotor 6, it is to avoid bearing bush temperature is too high, improves the security reliability of unit.The reasonable in design of the present invention, energy-efficient, safe and reliable, it is possible to avoid bearing bush temperature too high, it is easy to promote on a large scale and use.
Claims (2)
1. a high back pressure steam turbine precools tilting-pad bearing structure, it is characterized in that: this structure includes precooling tilting-pad bearing 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 in precooling tilting-type tile bearing broken tiles (2), precool tilting-type tile bearing broken tiles (2) to be arranged in by lug and screw (3) in precooling tilting-pad bearing housing (1) being provided with horizontal flange, precool tilting-pad bearing housing (1) to be fixed on bearing block (4).
A kind of high back pressure steam turbine the most according to claim 1 precools tilting-pad bearing structure, it is characterized in that: between described precooling tilting-pad bearing housing (1) and bearing block (4), be provided with annular oil groove, lubricating oil is flowed into by the oil-in of bearing block (4) to precool and is provided with annular oil groove between tilting-pad bearing housing (1) and bearing block (4), it is then divided into two-way, one road flows in the gap precooled between tilting-type tile bearing broken tiles (2) and high back pressure turbine rotor (6), the heat produced for taking away spin friction；The oilhole precooled in tilting-pad bearing housing (1) of separately leading up to flows on the high back pressure turbine rotor (6) between cooling tilting-pad bearing housing (1) and oil scraper ring (5), it is used for taking away owing to impeller and the packing boss of high back pressure turbine rotor (6) are in high-temperature region and pass to the heat of axle journal, and flow into bearing block (4) bottom, eventually pass 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 true CN105863748A (en) | 2016-08-17 |
| CN105863748B CN105863748B (en) | 2017-06-06 |
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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 |
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| CN (1) | CN105863748B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026185A (en) * | 2018-09-25 | 2018-12-18 | 中国船舶重工集团公司第七0三研究所 | A kind of low parameter back pressure turbine Quick Release ready-package end gland seal structure |
| CN109386614A (en) * | 2018-10-18 | 2019-02-26 | 华电电力科学研究院有限公司 | A kind of steam turbine oil scraper ring and its application method |
| 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
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026185A (en) * | 2018-09-25 | 2018-12-18 | 中国船舶重工集团公司第七0三研究所 | A kind of low parameter back pressure turbine Quick Release ready-package end gland seal structure |
| 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 |
| CN109386614A (en) * | 2018-10-18 | 2019-02-26 | 华电电力科学研究院有限公司 | A kind of steam turbine oil scraper ring and its application method |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN105863748B (en) | 2017-06-06 |
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