CN114017142A - Fully flexible support for steam turbine - Google Patents
Fully flexible support for steam turbine Download PDFInfo
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- CN114017142A CN114017142A CN202111467441.9A CN202111467441A CN114017142A CN 114017142 A CN114017142 A CN 114017142A CN 202111467441 A CN202111467441 A CN 202111467441A CN 114017142 A CN114017142 A CN 114017142A
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- steam turbine
- flexible
- steam
- cylinder
- sides
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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
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to a full-flexible support for a steam turbine, wherein flexible plates are arranged at the front end and the rear end of a steam turbine cylinder, two double-layer front flexible plates are respectively arranged at two sides of the front part of the steam turbine cylinder, an included angle of 45 degrees is kept with the axial direction of the steam turbine, the single-direction thrust less than 400 kilograms of the steam inlet pipeline of the steam turbine is borne, the steam turbine is allowed to expand towards the front part and two sides simultaneously, and two single-layer rear flexible plates are respectively arranged at two sides of the rear part of the steam turbine cylinder, the steam turbine cylinder is allowed to expand towards two sides and is used as a dead point of the overall axial expansion of the steam turbine. The invention replaces the conventional heavy bearing box supporting form, has the functions of meeting the requirement of the ship steam turbine equipment on impact resistance, allowing the steam turbine to thermally expand in three directions, bearing certain lateral thrust of a steam inlet pipeline and the like, can reduce the manufacturing cost of the steam turbine while eliminating the hidden danger of the thermal expansion blocking of the steam turbine, reduces the weight of the ship equipment in a breakthrough manner, and provides important support for improving the economic benefit or fighting performance of ship transportation.
Description
Technical Field
The invention belongs to the field of energy power, and particularly relates to a fully flexible support for a marine steam turbine.
Background
When the steam turbine cylinder supports are designed, the factors of overall thermal expansion and local thermal expansion, pipeline stress, impact resistance and the like of the steam turbine need to be considered, and if the thermal expansion of the steam turbine is not smooth or sufficient, starting is difficult or vibration is abnormal.
Steam turbine cylinder support structures generally take three forms: the rear end of a steam turbine cylinder is provided with a flexible plate, and the front end of the steam turbine cylinder is supported by a bearing box and combined with a cat-claw structure; the back end of the steam turbine cylinder is provided with a bearing box, and the front end is provided with a flexible plate support; thirdly, the front end of the steam turbine cylinder is provided with a sliding pin mechanism, and the rear end is provided with a bearing box support. The three common forms all have bearing box supports as dead points of the thermal expansion of the steam turbine cylinder, and the bearing boxes are generally formed by welding or casting steel plates and have heavy weight; according to a large number of operation examples, the phenomena of unsmooth thermal expansion or blocking of the steam turbine often occur in a sliding pin mechanism or a cat-paw structure, so that the steam turbine vibrates abnormally; in addition, the sliding pin mechanism and the cat-claw structure are easy to jam or block when the turbine bears asymmetric pipeline force.
Disclosure of Invention
The invention aims to solve the problems in the prior art and design a full-flexible support for a steam turbine, and by the light weight design of a full-flexible support structure for a steam turbine cylinder, the full-flexible support structure has a support function and an impact resistance function, greatly reduces the manufacturing cost, meets the requirement of light weight of ship equipment, and provides an important support for improving the economic benefit or fighting performance of ship transportation.
The specific technical scheme of the invention is as follows:
the utility model provides a steam turbine is flexible to be supported, all is provided with the flexbleboard at steam turbine cylinder front end and rear end, specifically as follows:
the two sides of the front part of the steam turbine cylinder are respectively provided with a double-layer front flexible plate which keeps an included angle of 45 degrees with the axial direction of the steam turbine, bears the unidirectional lateral thrust of less than 400 kilograms of the steam inlet pipeline of the steam turbine and allows the steam turbine to simultaneously expand towards the front part and the two sides, and the two sides of the rear part of the steam turbine cylinder are respectively provided with a single-layer rear flexible plate which allows the steam turbine cylinder to expand towards the two sides and simultaneously serve as a dead point of the integral axial expansion of the steam turbine.
Further, when the front flexible plate is installed, the lower bottom plate of the front flexible plate is pushed outwards by 2.8 mm, and the lower bottom plate of the front flexible plate and the installation base are fixed through hinged bolts.
Furthermore, when the rear flexible plate is installed, the lower bottom plate of the rear flexible plate is pushed outwards for 2 mm, and then the lower cylinder of the steam turbine is fixed together by the transverse support plate and the second bolt.
Furthermore, the steam turbine is fixedly connected with the mounting base through a first bolt during transportation and integral installation.
Furthermore, Q690 high-strength structural steel is adopted for the front flexible plate and the rear flexible plate, and the high-strength structural steel meets the requirements of thermal expansion, stress calculation and stability calculation of the flexible plates and the A-level impact resistance requirement of ship equipment.
Compared with the prior art, the invention has the beneficial effects that:
the invention uses the flexible board to support in the front and back position of the steam turbine, replace the conventional heavy bearing box support form, have the functions of meeting the requirement of the ship steam turbine equipment for shock resistance, allowing the three-way thermal expansion of the steam turbine, bearing certain lateral thrust of the steam inlet pipeline and the like, can reduce the weight of the steam turbine by over 400KG while eliminating the hidden danger of the thermal expansion blocking of the steam turbine, reduce the manufacturing cost of the steam turbine, reduce the weight of the ship equipment in a breakthrough manner, and provide important support for improving the economic benefit or fighting performance of ship transportation.
Drawings
FIG. 1 is a schematic diagram of a fully flexible support for a steam turbine;
FIG. 2 is a schematic view of FIG. 1 taken along line A;
FIG. 3 is a schematic view of FIG. 1 taken along line B;
wherein, 1-steam turbine inlet pipeline; 2-front flexible board; 3-reaming the bolt; 4-rear flexible board; 5-a first bolt; 6-a transverse support plate; 7-a second bolt; 8-upper cylinder; 9-lower cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Referring to a schematic diagram of the full-flexible support of the steam turbine, the embodiment of the invention provides a full-flexible support structure of a steam turbine cylinder, which comprises a front flexible plate 2, a rear flexible plate 4 and other main components.
The front flexible plate 2 is a double-layer flexible plate, the left flexible plate and the right flexible plate are respectively 1, the included angle between the front flexible plate and the steam turbine circumference is 45 degrees when the front flexible plate is installed, the thrust of the steam inlet pipeline 1 of the steam turbine smaller than 400 kilograms in one direction is borne, the lower bottom plate is pushed outwards by 2.8 millimeters when the front flexible plate is installed under a cold condition, the lower bottom plate and the installation base are fixed by a hinged bolt 3, and the steam turbine cylinder is allowed to expand laterally forwards and towards two sides when being heated; the rear flexible plate 4 is a single-layer flexible plate, the left flexible plate and the right flexible plate are respectively 1, the rear flexible plate is axially parallel to the steam turbine during installation and is an expansion dead point in the axial direction of the steam turbine, the lower bottom plate is pushed outwards for 2 mm during installation under a cold condition, the lower bottom plate and the lower steam turbine cylinder 9 are fixed together by the transverse support plate 6 and the second bolt 7, the lower steam turbine cylinder is fixedly connected with the installation base by the first bolt 5 during transportation and integral installation of the steam turbine, pre-deflection is not needed, the steam cylinder expands towards two sides when the steam turbine operates, and the front flexible plate and the rear flexible plate enable the steam turbine to release thermal stress during stable operation and operate well.
Claims (5)
1. The utility model provides a steam turbine full flexible support which characterized in that all is provided with the flexbleboard at steam turbine cylinder front end and rear end, specifically as follows:
the two sides of the front part of the steam turbine cylinder are respectively provided with a double-layer front flexible plate which keeps an included angle of 45 degrees with the axial direction of the steam turbine, bears the unidirectional lateral thrust of less than 400 kilograms of the steam inlet pipeline of the steam turbine and allows the steam turbine to simultaneously expand towards the front part and the two sides, and the two sides of the rear part of the steam turbine cylinder are respectively provided with a single-layer rear flexible plate which allows the steam turbine cylinder to expand towards the two sides and simultaneously serve as a dead point of the integral axial expansion of the steam turbine.
2. The fully flexible support for steam turbines according to claim 1, wherein the lower plate of the front flexible plate is pushed outward by 2.8 mm when the front flexible plate is installed, and the lower plate of the front flexible plate is fixed with the installation base by a hinge bolt.
3. The fully flexible support for steam turbines according to claim 1, wherein the lower plate of the rear flexible plate is pushed outward 2 mm when the rear flexible plate is installed, and then the lower cylinder of the steam turbine is fixed with the second bolt by using the cross brace.
4. The fully flexible support for a steam turbine according to claim 1, wherein the turbine is fixedly connected to the mounting base by a first bolt during transportation and integral installation of the steam turbine.
5. The turbine fully flexible support according to claim 1, wherein Q690 high strength structural steel is used for the front and rear flexible plates, and the high strength structural steel meets the requirements of thermal expansion, stress calculation and stability calculation of the flexible plates and the a-level impact resistance requirement of ship equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467441.9A CN114017142A (en) | 2021-12-02 | 2021-12-02 | Fully flexible support for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467441.9A CN114017142A (en) | 2021-12-02 | 2021-12-02 | Fully flexible support for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114017142A true CN114017142A (en) | 2022-02-08 |
Family
ID=80067747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111467441.9A Pending CN114017142A (en) | 2021-12-02 | 2021-12-02 | Fully flexible support for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114017142A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542214A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Marine steam turbine high reliability hollow rod supports cylinder structure |
-
2021
- 2021-12-02 CN CN202111467441.9A patent/CN114017142A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542214A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Marine steam turbine high reliability hollow rod supports cylinder structure |
| CN114542214B (en) * | 2022-03-09 | 2024-05-17 | 中国船舶重工集团公司第七0三研究所 | High-reliability hollow rod supporting cylinder structure of marine steam turbine |
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