CN112594010A - Low-pressure rotor structure for heating season heat supply of condensing steam turbine - Google Patents
Low-pressure rotor structure for heating season heat supply of condensing steam turbine Download PDFInfo
- Publication number
- CN112594010A CN112594010A CN202011382549.3A CN202011382549A CN112594010A CN 112594010 A CN112594010 A CN 112594010A CN 202011382549 A CN202011382549 A CN 202011382549A CN 112594010 A CN112594010 A CN 112594010A
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- Prior art keywords
- low
- pressure rotor
- steam turbine
- blade root
- heating
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 39
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 6
- 239000013589 supplement Substances 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 240000000353 Ruscus aculeatus Species 0.000 description 1
- 235000003500 Ruscus aculeatus Nutrition 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
Abstract
The invention discloses a low-pressure rotor structure for supplying heat to a condensing steam turbine in a heating season, which belongs to the technical field of low-pressure rotors of condensing steam turbines. The invention breaks through the limited thinking that different rotors need to be replaced when different functions are needed, supplements and improves the low-voltage rotor structure, and can realize the requirements of heat supply in heating seasons and power generation in non-heating seasons without replacement.
Description
Technical Field
The invention relates to the technical field of heating of a condensing steam turbine in heating seasons, in particular to a low-pressure rotor structure for heating of the condensing steam turbine in the heating seasons.
Background
The heat supply of the backpressure unit is the best economical, but the operation time of the backpressure unit is limited, and the backpressure unit cannot operate in non-heating seasons. In order to improve the economy, the condenser unit is changed into a backpressure unit, and the requirements of heat supply in a heating season and power generation in a non-heating season are met.
In order to meet the requirement that different functions are used in different seasons, articles need to be made on the low-pressure rotor, namely the original low-pressure rotor is used for generating electricity, the reconstructed low-pressure rotor is used for supplying heat, and the use in later-period re-generation is not influenced.
In order to solve the problems, the backpressure modification of the steam turbine of the current thermal power plant mainly adopts a method of directly replacing the original rotor of the steam turbine, namely, the low-pressure rotor is directly replaced by the optical axis rotor during heat supply in a heating season, the original low-pressure rotor is replaced during power generation in a non-heating season, although the problems of heat supply in the heating season and power generation in the non-heating season can be solved by the mode, the replacement of the new optical axis rotor is more expensive and time-consuming, and the replacement of the optical axis rotor is particularly troublesome because the unit is large in size, so that other parts cannot be accurately reset easily, and the normal operation of the unit is influenced.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a low pressure rotor structure for heating in the heating season of a condensing steam turbine; this a low pressure rotor structure for condensing steam turbine heating season heat supply breaks through the different functions of wanting, just will change the limitation thinking of different rotors, supplements the improvement to low pressure rotor structure, need not to change, just can realize the requirement of heat supply in heating season, generating electricity in non-heating season.
In order to solve the technical problem, the invention provides a low-pressure rotor structure for supplying heat to a condensing steam turbine in a heating season, which comprises a low-pressure rotor body, wherein a blade root groove is formed in the low-pressure rotor body, and false blade roots which are matched with the blade root groove in shape are arranged in the blade root groove.
In a further improvement of the invention, the false leaf root comprises a base body, and the base body is connected with a connector.
Through the design, the manufacturing of the false blade root can be more convenient.
In a further improvement of the invention, the connecting body is adapted to the shape of the root groove and is located in the root groove.
Through the design, the connection between the false blade root and the blade root groove can be more convenient.
In a further improvement of the invention, the matrix protrudes 2-10 cm from the root groove.
Through the design, the scheme can be more convenient for the disassembly and assembly of the false blade root.
Compared with the prior art, the invention has the following beneficial effects:
the invention breaks through the limited thinking that different rotors need to be replaced when different functions are needed, supplements and improves the structure of the low-voltage rotor, designs false blade roots which are matched with the shapes of blade root grooves for the blade root grooves of the low-voltage rotor to fill, and can realize the requirements of heat supply in heating seasons and power generation in non-heating seasons without replacing the optical axis rotor.
Drawings
To more clearly illustrate the background art or the technical solutions of the present invention, the following brief description of the drawings incorporated in the prior art or the detailed description of the present invention; it should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is to be given the full breadth of the present disclosure, and are not intended to limit the scope of the present disclosure.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic view of the structure of the root of Ruscus aculeatus of the present invention.
FIG. 3 is a schematic view of a blade root structure of a low-pressure rotor blade according to the prior art.
Shown in the figure: 1-a low pressure rotor body; 2-root groove; 3-false blade root; 31-a substrate; 32-a linker; 4-blade root.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following will make clear and complete description of the technical solution in the embodiments of the present invention 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, rather than all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.
Meanwhile, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like referred to in the present specification indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, it is not to be understood that the present invention is limited to changes or adjustments of relative relationships thereof, and also to be considered as a scope in which the present invention can be implemented without substantial technical changes.
Meanwhile, in the description of the present specification, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected", and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other, so that the specific meaning of the terms in the invention can be understood by those skilled in the art through specific situations.
As shown in fig. 1 and 2, a low-pressure rotor structure for heating season heating of a condensing steam turbine comprises a low-pressure rotor body 1, wherein a blade root groove 2 is formed in the low-pressure rotor body 1, and a false blade root 3 which is adaptive to the shape of the blade root groove 2 is arranged in the blade root groove 2.
The false blade root 3 comprises a base body 31, and a connecting body 32 is connected to the base body 31.
The connecting body 32 is adapted to the shape of the root groove 2 and is located in the root groove 2.
The matrix 31 protrudes 2 cm-10 cm from the root groove.
The method of the original rotor of the direct change steam turbine (as shown in figure 3) is mainly adopted in the current thermal power factory steam turbine backpressure transformation, directly change the low pressure rotor into the optical axis rotor during the heat supply in heating season promptly, change former low pressure rotor during the electricity generation in non-heating season, though the problem of generating electricity in non-heating season can be solved in the above-mentioned mode in the heat supply in heating season, but change new optical axis rotor firstly will spend a lot of money and time-consuming, secondly because the unit is bulky, the optical axis rotor is changed very troublesome, also cause other parts relatively easily and can not accurately reset, influence the normal operating of unit.
Therefore, the design concept of the application is to break through the limitation thinking of different rotors needing to be replaced, the low-voltage rotor structure is supplemented and improved (the improvement on the basis of the original low-voltage rotor body structure is not changed), the false blade root with the shape matched with the shape of the blade root groove is designed, when the heat is supplied in a heating season, the blade root is taken down, the false blade root is arranged in the blade root groove, when the power is generated in a non-heating season, the false blade root is taken down again, and the blade root is replaced.
When the false blade root is designed on the low-pressure rotor of the steam turbine, the material of the false blade root can be purchased in a grade-reduced mode compared with the material of the blade root of the original low-pressure rotor of the steam turbine under the condition that the strength requirement is met due to the fact that the centrifugal force of the original blade part is not generated, and benefit maximization is achieved with the least investment.
After calculation, various vibrations (transverse vibration and torsional vibration) of the shaft system and the strength of the shaft system and the low-pressure rotor meet the safety judgment criterion, and the shaft system and the low-pressure rotor can be installed on the low-pressure rotor of the steam turbine for supplying heat.
Through analysis of actual operation conditions and the like, the low-pressure rotor false blade root of the steam turbine is safe and reliable, the original low-pressure rotor body structure is not changed, a rotor of a light shaft is not required to be changed, and the requirement of power generation or heat supply is realized only through a modified structure (false blade root) which is assembled and disassembled for supplement; considerable transformation cost is saved, the design, manufacture and installation period is greatly shortened, and the method has high universality and economy.
Although the present invention has been described in detail with reference to the preferred embodiments, the present invention is not limited thereto, and those skilled in the art can make various equivalent modifications or substitutions on the embodiments of the present invention without departing from the spirit and essence of the present invention, and those modifications or substitutions should be considered as being within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and therefore, the scope of the present invention should be determined by the scope of the claims.
Claims (4)
1. The utility model provides a low pressure rotor structure that is used for heat supply in condensing steam turbine heating season, includes the low pressure rotor body, its characterized in that: the low-pressure rotor body is provided with a blade root groove, and a false blade root which is matched with the shape of the blade root groove is arranged in the blade root groove.
2. The low pressure rotor structure for heating season heating of a condensing steam turbine as claimed in claim 1, wherein: the false leaf root comprises a basal body, and the basal body is connected with a connector.
3. The low pressure rotor structure for heating season heating of a condensing steam turbine as claimed in claim 2, wherein: the connecting body is matched with the shape of the blade root groove and is positioned in the blade root groove.
4. The low pressure rotor structure for heating season heating of a condensing steam turbine as claimed in claim 2, wherein: the matrix protrudes 2 cm-10 cm from the root groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011382549.3A CN112594010A (en) | 2020-12-01 | 2020-12-01 | Low-pressure rotor structure for heating season heat supply of condensing steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011382549.3A CN112594010A (en) | 2020-12-01 | 2020-12-01 | Low-pressure rotor structure for heating season heat supply of condensing steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112594010A true CN112594010A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011382549.3A Pending CN112594010A (en) | 2020-12-01 | 2020-12-01 | Low-pressure rotor structure for heating season heat supply of condensing steam turbine |
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| Country | Link |
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| CN (1) | CN112594010A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130156587A1 (en) * | 2011-09-30 | 2013-06-20 | Alstom Technology Ltd | Retrofitting methods and devices for large steam turbines |
| CN206513404U (en) * | 2017-02-16 | 2017-09-22 | 河北大唐国际丰润热电有限责任公司 | Steam power plant's optical axis heating system |
| CN206860236U (en) * | 2017-05-27 | 2018-01-09 | 华电能源股份有限公司牡丹江第二发电厂 | Low pressure monobloc forging optical axis rotor and steam turbine for steam turbine |
| CN209706180U (en) * | 2019-03-22 | 2019-11-29 | 陕西中河电力工程有限公司 | A kind of low pressure optical axis heating system |
-
2020
- 2020-12-01 CN CN202011382549.3A patent/CN112594010A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130156587A1 (en) * | 2011-09-30 | 2013-06-20 | Alstom Technology Ltd | Retrofitting methods and devices for large steam turbines |
| CN206513404U (en) * | 2017-02-16 | 2017-09-22 | 河北大唐国际丰润热电有限责任公司 | Steam power plant's optical axis heating system |
| CN206860236U (en) * | 2017-05-27 | 2018-01-09 | 华电能源股份有限公司牡丹江第二发电厂 | Low pressure monobloc forging optical axis rotor and steam turbine for steam turbine |
| CN209706180U (en) * | 2019-03-22 | 2019-11-29 | 陕西中河电力工程有限公司 | A kind of low pressure optical axis heating system |
Non-Patent Citations (2)
| Title |
|---|
| 山西省电力工业局: "《汽轮机设备检修技术》", 31 July 1985 * |
| 高炜，蒋建平，王宏伟: "汽轮机高背压改造在火电机组的应用", 《山东电力技术》 * |
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Application publication date: 20210402 |
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