CN112049691A - Multistage TRT stator blade inner shell - Google Patents
Multistage TRT stator blade inner shell Download PDFInfo
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- CN112049691A CN112049691A CN202011077367.5A CN202011077367A CN112049691A CN 112049691 A CN112049691 A CN 112049691A CN 202011077367 A CN202011077367 A CN 202011077367A CN 112049691 A CN112049691 A CN 112049691A
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- 238000003754 machining Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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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
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a multi-section TRT stator blade inner shell which comprises a first-stage air inlet section, a first-stage diameter expansion section, a second-stage air inlet section and a second-stage diameter expansion section which are coaxially arranged and sequentially connected, wherein a first arc section capable of being matched with the spherical surface of a first-stage stator blade is arranged in the circumferential direction of the first-stage air inlet section, and a second arc section capable of being matched with the spherical surface of a second-stage stator blade is arranged in the circumferential direction of the second-stage air inlet section. The stator blade inner shell adopts a multi-section structural design, so that each stage of TRT stator blade has a matched expansion angle; through setting up the first circular arc section and the first-stage quiet leaf spherical surface cooperation of the one-stage section of admitting air, the second circular arc section and the quiet leaf spherical surface cooperation of second grade section of admitting air have solved the too big problem in quiet leaf blade body of TRT and interior casing radial clearance on the one hand, have improved complete machine efficiency, and on the other hand has still made things convenient for the chamfer processing of quiet leaf mounting hole, has effectively promoted machining efficiency.
Description
Technical Field
The invention belongs to the technical field of blade type rotation, and particularly relates to a multi-section type TRT stationary blade inner shell.
Background
A Top Gas Pressure Recovery Turbine (TRT) power generation device for a blast furnace, which is a device that uses heat energy and Pressure energy of blast furnace Gas, and applies work through a Turbine. The device mainly comprises a rotor, a casing, a stator blade inner casing, an air inlet and exhaust guide basin, a movable blade, a fixed blade, a component, an adjusting mechanism and the like. The stator blade inner casing is one of the important components influencing the power of the whole machine.
The conventional stator blade inner casing usually adopts a single cone section design, as shown in fig. 1, that is, the whole gas expansion working channel is divided into two parts, namely an inlet straight section a and a single expanding section b, wherein the single expanding section b is usually arranged behind the first-stage stator blade c. The design method is convenient to process, but the expansion angles of all levels of the design method are required to be kept consistent, so that the matching between the blade profiles of all levels and the expansion angles is reduced, the radial clearance of the second-level stationary blade d on the inner shell side is overlarge, and the efficiency of the whole unit is reduced; and the second-stage stationary blade d is a conical surface, the inner side chamfer cannot be machined, only manual grinding can be performed, and the machining efficiency is reduced.
Disclosure of Invention
In order to solve part or all of the problems, the invention provides the multi-section type TRT stator blade inner shell, which solves the problems that the expansion angle of the expanding section of the traditional TRT stator blade inner shell is single, each stage of blade profile can only be matched with the single expansion angle, the radial clearance of the second stage stator blade at the inner shell side is overlarge, and the inner side chamfer at the mounting hole of the second stage stator blade is inconvenient to process, is convenient to process and greatly improves the efficiency of the whole unit.
The invention provides a multi-section TRT stator blade inner shell which comprises a first-stage air inlet section, a first-stage diameter expansion section, a second-stage air inlet section and a second-stage diameter expansion section which are coaxially arranged and sequentially connected, wherein a first arc section capable of being matched with the spherical surface of a first-stage stator blade is arranged in the circumferential direction of the first-stage air inlet section, and a second arc section capable of being matched with the spherical surface of a second-stage stator blade is arranged in the circumferential direction of the second-stage air inlet section.
Furthermore, the first-stage air inlet section further comprises a first equal-diameter section connected with the air inlet side of the first circular arc section and a second equal-diameter section connected with the air outlet side of the first circular arc section, and the second-stage air inlet section further comprises a third equal-diameter section connected with the air inlet side of the second circular arc section and a fourth equal-diameter section connected with the air outlet side of the second circular arc section.
Further, the first-stage air inlet section further comprises a first mounting hole communicated with the first arc section and used for mounting the first-stage stationary blade, and the second-stage air inlet section further comprises a second mounting hole communicated with the second arc section and used for mounting the second-stage stationary blade.
Furthermore, the arc center of the first arc section is located on the central shaft of the primary air inlet section, and the arc center of the second arc section is located on the central shaft of the secondary air inlet section.
Further, the first constant diameter section has an inner diameter equal to that of the second constant diameter section, and the third constant diameter section has an inner diameter equal to that of the fourth constant diameter section.
Further, the first constant diameter section has a length equal to that of the second constant diameter section, and the third constant diameter section has a length equal to that of the fourth constant diameter section.
Furthermore, the first mounting hole is vertically communicated with the arc midpoint of the first arc segment, and the second mounting hole is vertically communicated with the arc midpoint of the second arc segment.
Further, the arc radius of the second arc segment is larger than that of the first arc segment.
Furthermore, the included angle between the second-stage diameter expanding section and the fourth equal-diameter section is larger than the included angle between the first-stage diameter expanding section and the second equal-diameter section.
Further, the included angle between the second-stage diameter expanding section and the fourth equal-diameter section is 13-15 degrees, and the included angle between the first-stage diameter expanding section and the second equal-diameter section is 7-13 degrees.
The stator blade inner shell adopts a multi-section structural design, so that each stage of TRT stator blade has a matched expansion angle; through setting up the first circular arc section and the first-stage quiet leaf spherical surface cooperation of the one-stage section of admitting air, the second circular arc section and the quiet leaf spherical surface cooperation of second grade section of admitting air have solved the too big problem in quiet leaf blade body of TRT and interior casing radial clearance on the one hand, have improved complete machine efficiency, and on the other hand has still made things convenient for the chamfer processing of quiet leaf mounting hole, has effectively promoted machining efficiency.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of a conventional TRT vane inner casing of the prior art;
FIG. 2 is a schematic structural view of an inner casing of a multi-stage TRT vane according to an embodiment of the present invention.
Description of reference numerals: the multi-section type TRT static blade inner casing comprises a multi-section type TRT static blade inner casing 100, a first-stage air inlet section 1, a first arc section 101, a first equal-diameter section 102, a second equal-diameter section 103, a first mounting hole 104, a first diameter expanding section 2, a second-stage air inlet section 3, a second arc section 301, a third equal-diameter section 302, a fourth equal-diameter section 303, a second mounting hole 304, a second diameter expanding section 4, a first-stage static blade 5 and a second-stage static blade 6.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 2, the present embodiment provides a multi-section TRT stator blade inner casing, which includes a first-stage air inlet section 1, a first-stage diameter expanding section 2, a second-stage air inlet section 3, and a second-stage diameter expanding section 4 that are coaxially disposed and sequentially connected, wherein a first arc section 101 that can be matched with a spherical surface of a first-stage stator blade 5 is circumferentially disposed on the first-stage air inlet section 1, and a second arc section 301 that can be matched with a spherical surface of a second-stage stator blade 6 is circumferentially disposed on the second-stage air inlet section 3.
The stator blade inner shell of the embodiment adopts a multi-section structural design, so that each stage of stator blade of the TRT has a matched divergence angle; through setting up first circular arc section 101 and the 5 spherical cooperations of one-level quiet leaf of one-level section of admitting air 1, second circular arc section 301 and the 6 spherical cooperations of second grade quiet leaf of second grade section of admitting air 3, compare in the direct setting on the inflation section of the quiet leaf mounting hole of second grade in the quiet leaf inner housing of tradition, can't satisfy the spherical cooperation of the quiet leaf of second grade, cause the quiet leaf of second grade to have obvious clearance on the inner housing side, this embodiment is through the second circular arc section and the quiet leaf spherical cooperation of second grade that set up the second grade section of admitting air, the too big problem in TRT quiet leaf blade body and the interior casing radial clearance of casing has been solved, the overall efficiency is improved, in addition, the difficult problem of artifical polishing of the inboard chamfer of the quiet leaf mounting hole of traditional second grade quiet leaf mounting department has still been solved, the spherical cooperation design of second grade quiet leaf mounting department.
In this embodiment, the primary air intake section 1 further includes a first equal-diameter section 102 connected to the air intake side of the first circular arc section 101 and a second equal-diameter section 103 connected to the air discharge side of the first circular arc section 101, and the secondary air intake section 3 further includes a third equal-diameter section 302 connected to the air intake side of the second circular arc section 301 and a fourth equal-diameter section 303 connected to the air discharge side of the second circular arc section 301. Through set up the constant diameter section respectively in the both sides that are used for installing first circular arc section 101 of quiet leaf second circular arc section 301, effectively guaranteed the installation compactness of quiet leaf in the interior side of inner casing, compare in prior art secondary quiet leaf 6 and set up the structural design on the hole enlargement section, solved the problem that secondary quiet leaf 6 leads to whole unit efficiency bottom because of the clearance is too big in the interior side of inner casing.
In a preferred embodiment, the first constant diameter section 102 has an inner diameter equal to the inner diameter of the second constant diameter section 103, and the third constant diameter section 302 has an inner diameter equal to the inner diameter of the fourth constant diameter section 303. So that the distance between the first equal-diameter section and the central shaft is equal to the distance between the second equal-diameter section and the central shaft, the symmetry of the joint between the two ends of the first circular arc section and the first equal-diameter section 102 and the second equal-diameter section 103 is ensured, and the installation tightness of the first-stage stationary blade 5 at the inner side of the first circular arc section of the first-stage air inlet section 1 is ensured; similarly, the distance from the third equal-diameter section to the central shaft is equal to the distance from the fourth equal-diameter section to the central shaft, so that the symmetry between the two ends of the second arc section and the joint of the third equal-diameter section 302 and the fourth equal-diameter section 303 is ensured, and the installation tightness of the second-stage stationary blade 6 at the inner side of the second arc section of the second-stage air inlet section 3 is ensured.
In a preferred embodiment, the first radius 102 is equal in length to the second radius 103, and the third radius 302 is equal in length to the fourth radius 303. So that first-stage quiet leaf 5 installs in the central point of first section of admitting air and put, and second grade quiet leaf 6 installs in the central point of second section of admitting air, does benefit to the circulation stability who guarantees the installation stability of first-stage quiet leaf 5 and second grade quiet leaf 6 and gaseous.
In the multi-section TRT stator blade inner casing in this embodiment, the first-stage air inlet section 1 further includes a first mounting hole 104 communicated with the first arc section 101 and used for mounting the first-stage stator blade 5, and the second-stage air inlet section 3 further includes a second mounting hole 304 communicated with the second arc section 301 and used for mounting the second-stage stator blade 6. The first-stage stationary blade 5 is fixedly mounted through the first mounting hole 104, so that the spherical surface of the first-stage stationary blade 5 is in spherical fit with the first arc section 101 of the first air inlet section, the deflection angle of the first-stage stationary blade 5 is adjusted by adjusting the assembly angle of the first-stage stationary blade 5 and the first mounting hole 104, similarly, the second-stage stationary blade 6 is fixedly mounted through the second mounting hole 304, so that the spherical surface of the second-stage stationary blade 6 is in spherical fit with the second arc section 301 of the second air inlet section, and the deflection angle of the second-stage stationary blade 6 is adjusted by adjusting the assembly angle of the second-stage stationary blade 6 and the second mounting hole 304.
In a preferred embodiment, the arc center of the first arc segment 101 is located on the central axis of the primary air intake segment 1, and the arc center of the second arc segment 301 is located on the central axis of the secondary air intake segment 3. The plurality of first-stage stator vanes 5 mounted on the first air inlet section can be made to face the central axis of the inner casing, and the plurality of second-stage stator vanes 6 mounted on the second air inlet section can be made to face the central axis of the inner casing. The arrangement consistency of the first-stage static blades 5 and the second-stage static blades 6 is ensured. Because the diameter expansion section is arranged between the first-stage air inlet section 1 and the second-stage air inlet section 3, the inner diameter of the second-stage air inlet section 3 is larger than that of the first-stage air inlet section 1, so that the arc radius of the second arc section 301 is larger than that of the first arc section 101 in the multi-stage TRT stationary blade inner casing of the embodiment. The size of the arc radius is generally determined by the size of the host. In a specific embodiment, the arc radius of the first arc segment 101 is 400mm to 900mm, and the arc radius of the second arc segment 301 is 450mm to 1000 mm.
In a preferred embodiment, the first mounting hole 104 is vertically communicated with the arc middle point of the first arc segment 101, and the second mounting hole 304 is vertically communicated with the arc middle point of the second arc segment 301. The stator blade can be ensured to face the central shaft of the inner shell at any deflection angle.
In the present embodiment, the included angle between the secondary diameter-expanding section 4 and the fourth equal-diameter section 303 is larger than the included angle between the primary diameter-expanding section 2 and the second equal-diameter section 103. Because the expansion ratio and the aerodynamic load coefficient of each stage of blade are different, the optimal expansion angle of each stage of blade is different. This embodiment has different expansion angles respectively through setting up first order hole enlargement section 2 and second grade hole enlargement section 4 to satisfy the expansion angle demand of different blades, specific angle is decided according to actual project parameter, compares in the unified expansion angle design of traditional TRT quiet leaf inner shell, has effectively promoted the efficiency of whole unit.
In a specific embodiment, in the primary air intake section 1, the starting point B of the first circular arc section 101 is located about 50-400 mm behind the airflow inlet a, the end point of the first circular arc section 101 is located at D, the center of the first circular arc section 101 is located at the center of the main shaft, and the first mounting hole 104 for mounting the primary stationary blade 5 is located at the midpoint C of the first circular arc section 101.
The axial size of the first-stage expanding section 2 is preferably 100-600 mm after the first-stage air inlet section 1, wherein the included angle between the first-stage expanding section 2 and the second equal-diameter section 103 is 7-13 degrees.
In the second-stage air inlet section 3, the starting point G of the second arc section 301 is arranged at a position about 50-300 mm behind the airflow inlet F, the end point of the second arc section 301 is located at the position I, the center of the second arc section 301 is located at the center of the main shaft, and the second mounting hole 304 for mounting the second-stage stationary blade 6 is located at the midpoint H of the second arc section 301. The radius of the second arc segment 301 is determined by the size of the host, in this embodiment, it is preferable that the radius of the second arc segment 301 is 450mm to 1000mm, and the radius of the second arc segment 301 is larger than the radius of the first arc segment 101.
And the secondary diameter expanding section 4 is positioned behind the secondary air inlet section 3, the included angle between the secondary diameter expanding section 4 and the fourth equal-diameter section 303 is 13-15 degrees, and is generally larger than the included angle between the primary diameter expanding section 2 and the second equal-diameter section 103.
In the multi-section type TRT stationary blade inner shell in the embodiment, the optimal expansion angles are respectively matched for all the stages, and the second arc section matched with the spherical surface of the second-stage stationary blade 6 is arranged at the second-stage air inlet section, so that the defect that the expansion angles corresponding to all the stages of blades of the traditional stationary blade inner shell are consistent due to only one expansion section is overcome, the processing convenience is improved, the unit operation efficiency is remarkably improved, and for the conventional TRT, the overall efficiency can be improved by 1-2% on the original basis.
In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The utility model provides a multistage formula TRT quiet leaf inner casing, its characterized in that includes coaxial setting and the one-level section of admitting air, first-level hole enlargement section, second grade section of admitting air and the second grade hole enlargement section that links to each other in order, the first circular arc section that can cooperate with the sphere of one-level quiet leaf is provided with in the circumference of one-level section of admitting air, the second circular arc section that can cooperate with the sphere of second grade quiet leaf is provided with in the circumference of the second grade section of admitting air.
2. The multi-section TRT vane inner casing of claim 1, wherein the primary air intake section further comprises a first constant diameter section connected to an air intake side of the first circular arc section and a second constant diameter section connected to an air outlet side of the first circular arc section, and the secondary air intake section further comprises a third constant diameter section connected to an air intake side of the second circular arc section and a fourth constant diameter section connected to an air outlet side of the second circular arc section.
3. The multi-section TRT stator vane inner casing of claim 1, wherein the first stage air inlet section further comprises a first mounting hole in communication with the first arc section for mounting the first stage stator vane, and the second stage air inlet section further comprises a second mounting hole in communication with the second arc section for mounting the second stage stator vane.
4. The multi-section TRT stator vane inner casing according to claim 1, wherein the arc center of the first arc section is located on the central axis of the primary air intake section, and the arc center of the second arc section is located on the central axis of the secondary air intake section.
5. The multi-section TRT vane inner casing of claim 2, wherein the inner diameter of the first constant diameter section is equal to the inner diameter of the second constant diameter section, and the inner diameter of the third constant diameter section is equal to the inner diameter of the fourth constant diameter section.
6. The multi-section TRT vane inner casing of claim 2, wherein the first constant diameter section is equal in length to the second constant diameter section, and the third constant diameter section is equal in length to the fourth constant diameter section.
7. The multi-section TRT vane inner casing of claim 3, wherein the first mounting hole is in vertical communication with a circular arc midpoint of the first circular arc section, and the second mounting hole is in vertical communication with a circular arc midpoint of the second circular arc section.
8. The multi-section TRT vane inner casing of claim 1, wherein the second arc section has a larger arc radius than the first arc section.
9. The multi-section TRT vane inner casing of claim 2, wherein an angle between the secondary diameter expansion section and the fourth diameter-equant section is larger than an angle between the primary diameter expansion section and the second diameter-equant section.
10. The multi-section TRT vane inner casing according to claim 9, wherein an angle between the second diameter-expanded section and the fourth diameter-equalized section is 13 ° to 15 °, and an angle between the first diameter-expanded section and the second diameter-equalized section is 7 ° to 13 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011077367.5A CN112049691A (en) | 2020-10-10 | 2020-10-10 | Multistage TRT stator blade inner shell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011077367.5A CN112049691A (en) | 2020-10-10 | 2020-10-10 | Multistage TRT stator blade inner shell |
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| CN112049691A true CN112049691A (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011077367.5A Pending CN112049691A (en) | 2020-10-10 | 2020-10-10 | Multistage TRT stator blade inner shell |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203626893U (en) * | 2013-11-27 | 2014-06-04 | 成都成发科能动力工程有限公司 | Detachable anti-flushing ring used for TRT static blade inner shell |
| CN203626895U (en) * | 2013-11-30 | 2014-06-04 | 成都成发科能动力工程有限公司 | Dual-stage disc type TRT (top gas recovery turbine) device |
| CN104343738A (en) * | 2013-07-30 | 2015-02-11 | 三井造船株式会社 | Stationary blade structure of axial compressor |
| CN212296503U (en) * | 2020-10-10 | 2021-01-05 | 成都成发科能动力工程有限公司 | Multistage TRT stator blade inner shell |
-
2020
- 2020-10-10 CN CN202011077367.5A patent/CN112049691A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343738A (en) * | 2013-07-30 | 2015-02-11 | 三井造船株式会社 | Stationary blade structure of axial compressor |
| CN203626893U (en) * | 2013-11-27 | 2014-06-04 | 成都成发科能动力工程有限公司 | Detachable anti-flushing ring used for TRT static blade inner shell |
| CN203626895U (en) * | 2013-11-30 | 2014-06-04 | 成都成发科能动力工程有限公司 | Dual-stage disc type TRT (top gas recovery turbine) device |
| CN212296503U (en) * | 2020-10-10 | 2021-01-05 | 成都成发科能动力工程有限公司 | Multistage TRT stator blade inner shell |
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