CN109653807B - Steam compensating device - Google Patents
Steam compensating device Download PDFInfo
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- CN109653807B CN109653807B CN201811453732.0A CN201811453732A CN109653807B CN 109653807 B CN109653807 B CN 109653807B CN 201811453732 A CN201811453732 A CN 201811453732A CN 109653807 B CN109653807 B CN 109653807B
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- steam
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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
- F01D9/00—Stators
- F01D9/06—Fluid supply conduits to nozzles or the like
Abstract
The invention provides a steam supplementing device, which belongs to the technical field of thermal power generation, and is arranged on a steam turbine, is connected with a steam supplementing inlet, is used for rectifying steam flow, and sends the steam flow into a main flow passage, and comprises an annular steam mixing chamber, a flow guide passage and a shielding flow guide ring; one end of the annular steam mixing chamber is communicated with the steam supplementing inlet, the other end of the annular steam mixing chamber is communicated with the flow guide channel, and the extending direction of the flow guide channel and the extending direction of the main flow channel form an acute angle; the shielding guide ring is arranged on one side, away from the annular steam mixing chamber, of the main flow channel, and is arranged on the edge, away from the annular steam mixing chamber, of the guide flow channel. Through setting up the annular steam mixing chamber, when opening the moisturizing valve according to unit operational aspect needs, the highly compressed disorderly stream of high temperature gets into the annular steam mixing chamber through the moisturizing entry, and the disorderly stream of steam mixes the rectification back in the annular steam mixing chamber fully, through the water conservancy diversion passageway, in getting into the mainstream passageway with the angle of settlement, mixes into the mainstream stream.
Description
Technical Field
The invention relates to the technical field of thermal power generation, in particular to a steam supplementing device.
Background
Due to the rising of energy cost and the continuous improvement of environmental protection requirements, the economy increasingly becomes an important index for examining the steam turbine equipment in the power plant, and therefore, equipment optimization and innovation are continuously carried out in each large steam turbine manufacturing plant, so that the new market requirements are met. During the period, the steam turbine with the steam supplementing valve is separated, when the unit operates normally, the steam supplementing valve is fully opened, the throttling loss of the valve is reduced, and the economy of the unit is improved, so that the steam turbine with the steam supplementing valve has obvious competitive advantage compared with the traditional steam turbine with nozzle steam distribution or throttling steam distribution.
However, since the steam source of the steam supplement valve is usually high-temperature and high-pressure steam with the same parameters as the main steam, when the steam supplement valve is opened, turbulent steam flow with high temperature and high pressure enters the through-flow section, which causes serious disturbance to the main steam in the through-flow section, reduces the efficiency of the unit, and even causes the unit to vibrate.
Disclosure of Invention
The invention provides a steam supplementing device, and aims to solve the problems of the steam supplementing device in the prior art.
The invention is realized by the following steps:
a kind of steam compensating device, install on steam turbine and connect to the entry of steam compensating, used for the steam flow rectification, and send the steam flow into the main flow channel, including annular steam mixing chamber, flow guide channel and sheltering from the flow guide ring;
one end of the annular steam mixing chamber is communicated with a steam supplementing inlet, the other end of the annular steam mixing chamber is communicated with the flow guide channel, and the extending direction of the flow guide channel and the extending direction of the main flow channel form an acute angle;
the shielding guide ring is arranged on one side, away from the annular steam mixing chamber, of the main flow channel, and the shielding guide ring is arranged on the edge, away from the annular steam mixing chamber, of the guide channel.
In an embodiment of the present invention, a steam outlet is provided between the annular steam mixing chamber and the flow guide channel, the steam outlet is formed by enclosing an outer wall of the first flow guide ring and an inner wall of the second flow guide ring, and the steam outlet is in a necking shape as being far away from the annular steam mixing chamber.
In one embodiment of the invention, the flow guide channel is formed by enclosing the outer wall of the first flow guide ring and the inner wall of the third flow guide ring, and a flaring is formed at one end of the flow guide channel, which is far away from the annular steam mixing chamber.
In one embodiment of the invention, the included angle between the axis of the flow guide channel and the axis of the main flow channel is 45-55 degrees.
In one embodiment of the invention, the first and second deflector rings are integrally formed with a cylinder of the steam turbine.
The invention has the beneficial effects that: the embodiment of the invention is provided with the annular steam mixing chamber, when the steam supplementing valve is required to be opened according to the running condition of a unit, the high-temperature and high-pressure turbulent steam flows enter the annular steam mixing chamber through the steam supplementing inlet, and after being fully mixed and rectified in the annular steam mixing chamber, the turbulent steam flows enter the main flow channel at a set angle through the flow guide channel and are mixed into the main steam flow. In the process, the high-temperature and high-pressure turbulent steam flow realizes buffering and rectification and stably and uniformly enters the main steam flow at the cut-in angle, so that the disturbance of the steam supplement to the main steam flow flowing axially is reduced, the turbulence degree is reduced to the minimum, and the unit efficiency of the steam turbine is ensured.
The steam compensating device provided by the embodiment of the invention can be used in power station steam turbine units with various power levels of 150 MW-1000 MW, the steam loss and unit vibration problems caused by turbulent mixing in the starting process of the steam compensating valve are solved through the structural arrangement of the steam compensating device, and the economy, peak regulation capability and safety of the unit are well considered. The steam supplementing device can adapt to continuously improved market requirements of steam turbine equipment and increasingly severe environmental protection requirements, and is high in practicability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic partial structure diagram of a steam compensating device applied to a steam turbine according to an embodiment of the present invention.
Icon: 100-steam supplement inlet; 200-a primary flow channel; 300-an annular steam mixing chamber; 400-a flow guide channel; 510-shielding the guide ring; 410-a first flow guide ring; 430-a second flow guide ring; 010-a separator; 450-a third flow guide ring; 030-rotor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Examples
Referring to fig. 1, the steam supplementing device is disposed on a steam turbine and connected to a steam supplementing inlet 100, and is used for rectifying a steam flow entering from the steam supplementing inlet 100 and then delivering the steam flow to a main flow passage 200.
The steam supplementing device comprises an annular steam mixing chamber 300, a flow guide channel 400 and a shielding flow guide ring 510. One end of the annular steam mixing chamber 300 is communicated with the steam supplementing inlet 100, and the steam flow coming from the steam supplementing inlet 100 is decelerated and rectified in the annular steam mixing chamber 300. The other end of the annular steam mixing chamber 300 is communicated with the flow guide channel 400, and the steam flow rectified in the annular steam mixing chamber is guided into the main flow channel 200 through the flow guide channel 400.
In order to prevent the flow of the steam in the main flow channel 200 from being affected as much as possible, the extending direction of the flow guide channel 400 and the extending direction of the main flow channel 200 form an acute angle. The steam flow of the guide channel 400 is consistent with the main steam flow direction of the main flow channel 200 as much as possible, and the two steam flows are quickly mixed into one stream without disturbance as much as possible.
Specifically, the included angle between the axis of the flow guide channel 400 and the axis of the main flow channel 200 is 45-55 degrees, so that on the premise that the steam flow of the flow guide channel 400 is consistent with the main steam flow direction of the main flow channel 200 as much as possible, the length of the flow guide channel 400 can be shortened, and the production and assembly difficulty of the flow guide channel 400 is reduced.
In order to prevent the steam flow of the guide passage 400 from impacting the rotor 030 and causing vibration of the rotor 030, a shielding guide ring 510 is further provided. The shielding guide ring 510 is disposed on one side of the main flow channel 200 away from the annular steam mixing chamber 300, and the shielding guide ring 510 is disposed along the line of the guide channel 400 away from the steam mixing chamber, so that the steam coming out from the guide channel 400 impacts one side of the main flow channel 200 away from the annular steam mixing chamber, and the shielding guide ring 510 buffers the impact force of the steam flow in the guide channel 400.
In this embodiment, the surface of the shielding flow guiding ring 510 through which the main steam flows is a flat surface, and the flat surface is flush with the lower surface of the main flow channel 200 through which the main steam flows, so as to avoid disturbance of the structure of the shielding flow guiding ring 510 itself on the main flow. In this embodiment, the cross section of the shielding flow guide ring 510 is "L" shaped, and of course, the structural shape is not limited, the cross section of the shielding flow guide ring 510 may also be "one" shaped, and the shape and structure of the shielding flow guide ring 510 may be selected as long as the conditions that not only can shield the steam (playing a role in protecting the rotor 030) discharged from the outlet of the mixed steam flow channel, but also the flow of the main stream itself is not affected are met.
In this embodiment, a steam outlet is formed between the annular steam mixing chamber 300 and the flow guide channel 400, the steam outlet is formed by enclosing the outer wall of the first flow guide ring 410 and the inner wall of the second flow guide ring 430, and the steam outlet is in a necking shape as being far away from the annular steam mixing chamber. The steam can be rectified before confluence through the steam guide outlet in the shape of a necking.
In this embodiment, the first guide ring 410 and the second guide ring 430 are integrally formed, and specifically, the first guide ring 410 and the second guide ring 430 are integrally cast and formed by a cylinder, so that the integral assembly is facilitated, and the integral strength can be ensured.
The guide passage 400 is formed by the outer wall of the first guide ring 410 and the inner wall of the third guide ring 450, a flaring is formed at one end of the guide passage 400 far away from the annular steam mixing chamber 300, and the steam flow is smoothly conveyed out of the guide passage 400 through the flaring of the guide passage 400.
In this embodiment, the second guide ring 430 is connected to the N-stage partition 010 in the steam turbine, and the shielding guide ring 510 is connected to the N + 1-stage partition 010 in the steam turbine, so that the outlet of the steam guide channel can flow out in a direction away from the blades and enter the next stage. In this embodiment, N is 5, that is, actually, the third guide ring 450 and the shielding guide ring 510 are respectively connected to the front partition plate 010 and the rear partition plate 010 of the 6 th pressure stage, the third guide ring 450 is connected to the front partition plate 010 of the 6 th pressure stage, and the shielding guide ring 510 is connected to the rear partition plate 010 of the 6 th pressure stage.
In this embodiment, the surface of the shielding flow guiding ring 510 through which the main steam flows is a flat surface, and as can be seen from fig. 1, the surface is flush with the lower surface of the main flow channel 200 through which the main steam flows, so as to avoid the disturbance of the structure of the shielding flow guiding ring 510 itself to the main flow. In this embodiment, the cross section of the shielding flow guide ring 510 is "L" shaped, and of course, the structural shape is not limited, the cross section of the shielding flow guide ring 510 may also be "one" shaped, and the shape and structure of the shielding flow guide ring 510 may be selected as long as the conditions that not only can shield the steam discharged from the outlet of the mixed steam flow channel (which can protect the rotor 030), but also do not affect the flow of the main stream itself are satisfied.
The steam supplementing device and the steam turbine provided by the embodiment of the invention have the beneficial effects that: the embodiment of the invention is provided with the annular steam mixing chamber 300, when the steam supplementing valve needs to be opened according to the running condition of the unit, the high-temperature and high-pressure turbulent steam flows enter the annular steam mixing chamber 300 through the steam supplementing inlet 100, and after being fully mixed and rectified in the annular steam mixing chamber 300, the turbulent steam flows enter the main flow channel 200 through the flow guide channel 400 at a set angle and are mixed into the main steam flow. In the process, the high-temperature and high-pressure turbulent steam flow realizes buffering and rectification and stably and uniformly enters the main steam flow at the cut-in angle, so that the disturbance of the steam supplement to the main steam flow flowing axially is reduced, the turbulence degree is reduced to the minimum, and the unit efficiency of the steam turbine is ensured.
The steam compensating device provided by the embodiment of the invention can be used in power station steam turbine units with various power levels of 150 MW-1000 MW, the steam loss and unit vibration problems caused by turbulent mixing in the starting process of the steam compensating valve are solved through the structural arrangement of the steam compensating device, and the economy, peak regulation capability and safety of the unit are well considered. The steam supplementing device can adapt to continuously improved market requirements of steam turbine equipment and increasingly severe environmental protection requirements, and is high in practicability.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A kind of steam compensating device, set up on the steam turbine and connect to the entry of steam compensating, used for the steam flow rectification, and send the steam flow into the main flow channel, characterized by, including mixing the cavity, flow guide channel and sheltering from the flow guide ring of the annular;
one end of the annular steam mixing chamber is communicated with a steam supplementing inlet, the other end of the annular steam mixing chamber is communicated with the flow guide channel, and the extending direction of the flow guide channel and the extending direction of the main flow channel form an acute angle;
the shielding guide ring is arranged on one side of the main flow channel, which is far away from the annular steam mixing chamber, and the shielding guide ring is arranged on the axial line of the guide channel, which is far away from the annular steam mixing chamber, of the guide channel;
the included angle between the axis of the flow guide channel and the axis of the main flow channel is 45-55 degrees;
the surface of the shielding guide ring through which the main steam flows is a flat surface, and the surface is level with the lower surface of the main flow channel through which the main steam flows; the cross section of the shielding flow guide ring is L-shaped or straight;
a steam guide outlet is formed between the annular steam mixing cavity and the flow guide channel, the steam guide outlet is formed by enclosing the outer wall of the first flow guide ring and the inner wall of the second flow guide ring, and the steam guide outlet is in a necking shape along with being far away from the annular steam mixing cavity;
the flow guide channel is formed by enclosing the outer wall of the first flow guide ring and the inner wall of the third flow guide ring, and one end, far away from the annular steam mixing chamber, of the flow guide channel forms a flaring.
2. The steam compensating apparatus of claim 1, wherein the first and second deflector rings are integrally formed with a cylinder of the steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453732.0A CN109653807B (en) | 2018-11-30 | 2018-11-30 | Steam compensating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453732.0A CN109653807B (en) | 2018-11-30 | 2018-11-30 | Steam compensating device |
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| Publication Number | Publication Date |
|---|---|
| CN109653807A CN109653807A (en) | 2019-04-19 |
| CN109653807B true CN109653807B (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811453732.0A Active CN109653807B (en) | 2018-11-30 | 2018-11-30 | Steam compensating device |
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| CN112832875B (en) * | 2021-02-03 | 2022-08-30 | 东方电气集团东方汽轮机有限公司 | Steam supplementing cavity structure of steam turbine cylinder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841205A (en) * | 1981-09-04 | 1983-03-10 | Hitachi Ltd | Mixed pressure steam turbine |
| JPS58167808A (en) * | 1982-03-29 | 1983-10-04 | Toshiba Corp | Mixed pressure turbine |
| JPS58202306A (en) * | 1982-05-19 | 1983-11-25 | Toshiba Corp | Mixed pressure turbine |
| JPS59128905A (en) * | 1983-01-14 | 1984-07-25 | Toshiba Corp | Mixed pressure type turbine |
| CN101922315A (en) * | 2010-09-16 | 2010-12-22 | 青岛捷能汽轮机集团股份有限公司 | Steam supplementing type turbine and steam supplementing device thereof |
| CN202391484U (en) * | 2011-12-19 | 2012-08-22 | 山东青能动力股份有限公司 | Adjustable steam-supplementing mechanism for steam turbine |
-
2018
- 2018-11-30 CN CN201811453732.0A patent/CN109653807B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841205A (en) * | 1981-09-04 | 1983-03-10 | Hitachi Ltd | Mixed pressure steam turbine |
| JPS58167808A (en) * | 1982-03-29 | 1983-10-04 | Toshiba Corp | Mixed pressure turbine |
| JPS58202306A (en) * | 1982-05-19 | 1983-11-25 | Toshiba Corp | Mixed pressure turbine |
| JPS59128905A (en) * | 1983-01-14 | 1984-07-25 | Toshiba Corp | Mixed pressure type turbine |
| CN101922315A (en) * | 2010-09-16 | 2010-12-22 | 青岛捷能汽轮机集团股份有限公司 | Steam supplementing type turbine and steam supplementing device thereof |
| CN202391484U (en) * | 2011-12-19 | 2012-08-22 | 山东青能动力股份有限公司 | Adjustable steam-supplementing mechanism for steam turbine |
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| CN109653807A (en) | 2019-04-19 |
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