CN108386304A - The seat ring of reaction turbine - Google Patents
The seat ring of reaction turbine Download PDFInfo
- Publication number
- CN108386304A CN108386304A CN201810374133.3A CN201810374133A CN108386304A CN 108386304 A CN108386304 A CN 108386304A CN 201810374133 A CN201810374133 A CN 201810374133A CN 108386304 A CN108386304 A CN 108386304A
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- empennage
- fixed guide
- guide vane
- outlet edge
- edge
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- 238000003466 welding Methods 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 6
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000011120 plywood Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a kind of seat rings of reaction turbine, belong to turbine technology field, including upper ring plate, lower ring plate and the multiple fixed guide vanes being fixed between upper ring plate and lower ring plate, it is characterised in that：It is provided with empennage on the fixed guide vane, on empennage is fixed in the middle part of the outlet edge of fixed guide vane, the empennage is in the form of a column, the cross section of empennage is trapezoidal, it is surrounded by empennage bottom edge, empennage outlet edge, the first empennage side and the second empennage side, the outlet edge equal length of empennage bottom edge length and fixed guide vane, the empennage bottom edge is parallel with empennage outlet edge, and empennage bottom edge length is more than empennage and is discharged edge lengths.The present invention can improve the excited frequency of Karman vortex street, reduce the hammer vibration energy of Karman vortex street, can fixed guide vane Karman vortex street frequency be exported to be staggered with fixed guide vane intrinsic frequency, prevent that hydroelastic resonates, it avoids fixed guide vane that crackle and hydraulic turbine generation whistle occurs, ensures the job stability of the hydraulic turbine.
Description
Technical field
The present invention relates to turbine technology field more particularly to a kind of seat rings of reaction turbine.
Background technology
The fixed guide vane tool of reaction turbine will come from spiral case there are two function first, as flow passage components
Uniform fluid flow import movable guide vane；Second, as stressed member, by the weight transmitting of entire turbine-generator units to coagulation
On earth foundation.Due to the progress of reaction turbine the Hydraulic Design technology, the fixed guide vane designed using state-of-the-art technology is seldom gone out
Existing hydroelastic resonance problem.But there are two reasons still to make this covibration even on the reaction turbine that some have put into operation
There is generation, first, the frequency that existing the Hydraulic Design technology is also difficult to export fixed guide vane Karman vortex street carries out Accurate Prediction；
Second is that the enlargement of reaction turbine and the reduction of fixed guide vane thickness are so that the rigidity of fixed guide vane reduces, to reduce
The intrinsic frequency of fixed guide vane, increase fixed guide vane outlet Karman vortex street frequency overlapped with intrinsic frequency and generate resonate can
It can property.Once there is this resonance, will occur whistle in hydraulic turbine operation, and cause fixed guide vane to split in a short period of time
Line.
The formation of Karman vortex street is mainly that fixed guide vane Profile Design is bad, is produced in fixed guide vane front and back near exit
The flow separation whirlpool of raw flow separation, front and back is caused in staggeredly falling off.The frequency of Karman vortex street isWherein fkFor
Karman vortex street frequency Hz；S is Si Teluha numbers, it is related with Reynolds number, in reaction turbine, S=0.18~0.24；V
Mainstream speed m/s outside for boundary layer；T is the tail width m of the separation of flow, which is fixed guide vane outlet edge thickness, just
The sum of face boundary layer thickness, back side boundary layer thickness three.Exist with fixed guide vane once fixed guide vane exports Karman vortex street frequency
Underwater natural frequencies are equal or close, just will appear hydroelastic resonance.This resonance is eliminated, it theoretically only need to be by two
Kind frequency is staggered, otherwise it improves Karman vortex street frequency or improves the intrinsic frequency of fixed guide vane.And it is anti-from having put into operation
It hits in the feasibility of formula hydraulic turbine engineering practice and says, become very tired by increasing fixed guide vane rigidity to improve its intrinsic frequency
It is difficult.Therefore, in the prior art, do not use the method for changing fixed guide vane intrinsic frequency usually, and mainly fixed using raising
Guide vane exports the method for Karman vortex street frequency to eliminate this resonance.It is not only staggered using the method for improving Karman vortex street frequency
It is overlapped with fixed guide vane intrinsic frequency, moreover it is possible to the energy of Karman vortex street is substantially reduced, because Karman vortex street frequency once improves,
The energy of vortex street will weaken significantly, to significantly reduce the possibility that Karman vortex street evokes resonance.
In the prior art, Karman vortex street frequency is exported in order to improve fixed guide vane, most common method is to fixed guide vane
The back side carries out repairing type, by changing the molded line at the fixed guide vane back side near fixed guide vane outlet edge, and fixed guide vane water outlet is thinned
The thickness on side reduces the fixed guide vane outlet edge separation of flow, reduces fixed guide vane outlet edge separation of flow point tail width, improves Karman vortex street
Frequency reduces vortex street energy, to achieve the purpose that eliminate resonance.However but had the following disadvantages using this repairing type method,
First, since Karman vortex street frequency and fixed guide vane intrinsic frequency are difficult theoretically accurately to provide, fixed guide vane tail portion
Repairing type amount is difficult to determine, that is to say, that carries out repairing type to fixed guide vane outlet edge and cannot ensure to accomplish in one move, needs in many cases
Resonance problem caused by Karman vortex street could thoroughly be eliminated by carrying out multiple repairing type, and engineering construction difficulty is big, and the period is long, cost
It is high；Second, fixed guide vane is the most important stressed member of reaction turbine, carrying out repairing type to fixed guide vane outlet edge how much can
Reduce the mechanical strength of fixed guide vane；Third, carrying out how much repairing type can change the intrinsic of fixed guide vane to fixed guide vane outlet edge
Frequency, this wrong frequency also between Karman vortex street excited frequency and fixed guide vane intrinsic frequency bring new uncertainty.
Publication No. CN 201047332Y, publication date are that on 04 16th, 2008 Chinese patent literatures disclose one kind
Turbine stay ring, including upper ring plate and lower ring plate, the circumferential fixation one by one being uniformly welded between upper ring plate and lower ring plate are led
Leaf, lower retainer plate and lower fixed ring with the upper retainer plate of upper ring plate welding and upper fixed ring and lower ring plate welding, feature
It is：Fixed circle and upper fixed ring are welded on the lower face of upper ring plate, and ring diversion plate is welded in upper fixed ring outer circle,
Gusset is uniformly welded between ring diversion plate and upper ring plate；Lower retainer plate and lower fixed ring are welded on the upper surface of lower ring plate,
It is welded with ring diversion plate in lower fixed ring outer circle, gusset is uniformly welded between ring diversion plate and lower ring plate.
Publication No. CN 204646509U, publication date are that on 09 16th, 2015 Chinese patent literatures disclose one kind
Turbine seating ring assemblies, including：Upper copper ring, upper rebound, upper ring plate, lower ring plate, lower copper ring, lower rebound, upper copper ring and on
Rebound is set on upper ring plate, and lower copper ring and lower rebound are set on lower ring plate, it is characterised in that：Further include fixed guide vane and in
Ring flat-plate combines, and the conjunction of middle ring board group includes top plate and lower plywood, is additionally provided between top plate and lower plywood and is connected and fixed item, middle ring
Board group, which is closed, to be set between upper ring plate and lower ring plate, and top plate and lower plywood are equipped with the limit hole for allowing fixed guide vane to pass through, fixed
Guide vane passes through limit hole, and the edge of fixed guide vane and limit hole is also by being welded and fixed, and both ends are respectively welded and are fixed on
Ring flat-plate and lower ring plate.
Using above patent document as the prior art of representative, there is following defect：
Fixed guide vane outlet Karman vortex street frequency on seat ring is easy to overlap with fixed guide vane intrinsic frequency, generates waterpower bullet
Property resonance, cause fixed guide vane that crackle occurs, the entire hydraulic turbine generates whistle, greatly influences the job stability of the hydraulic turbine.
Invention content
The present invention provides a kind of seat ring of reaction turbine, energy of the present invention to overcome the defect of the above-mentioned prior art
The excited frequency for enough improving Karman vortex street, reduces the hammer vibration energy of Karman vortex street, and fixed guide vane can be exported to Karman vortex street frequency
Rate is staggered with fixed guide vane intrinsic frequency, prevents that hydroelastic resonates, and avoids fixed guide vane that crackle and hydraulic turbine production occurs
Raw whistle, ensures the job stability of the hydraulic turbine.
The present invention is achieved through the following technical solutions：
The seat ring of reaction turbine, including upper ring plate, lower ring plate and be fixed on multiple between upper ring plate and lower ring plate
Fixed guide vane, it is characterised in that：Empennage is provided on the fixed guide vane, empennage is fixed in the middle part of the outlet edge of fixed guide vane
On, the empennage is in the form of a column, and the cross section of empennage is trapezoidal, by empennage bottom edge, empennage outlet edge, the first empennage side and second
Empennage side surrounds, the outlet edge equal length of empennage bottom edge length and fixed guide vane, empennage bottom edge and fixed guide vane
Outlet edge is fixedly connected, and the empennage bottom edge is parallel with empennage outlet edge, and empennage bottom edge length is more than empennage and is discharged edge lengths.
The side on the empennage bottom edge is provided with the first welding groove in 45 degree, and the other side is provided with the second welding in 45 degree
Groove, the first welding groove and the second welding groove are arranged symmetrically, and the outlet edge of empennage bottom edge and fixed guide vane passes through the company of welding
It connects.
The thickness of the empennage outlet edge is 3-5 millimeters.
Spacing between the upper end of the empennage and the outlet edge upper end of fixed guide vane is the outlet edge height of fixed guide vane
1-5%, spacing between the lower end of empennage and the outlet edge lower end of fixed guide vane is the 1- of the outlet edge height of fixed guide vane
5%.
Multiple fixed guide vanes are identical geometric dimension, and the spacing of two fixed guide vanes of arbitrary neighborhood is identical.
The outlet edge of fixed guide vane and the upper end of empennage to form the first weld seam by being welded to connect, the outlet edge of fixed guide vane
With the lower end of empennage the second weld seam is formed by being welded to connect.
Fixed guide vane tail portion back side molded line is straight line, and the first empennage side is the extension of fixed guide vane tail portion back side molded line
Line；Fixed guide vane tail portion front molded line is straight line, and the second empennage side is the extended line of fixed guide vane tail portion front molded line.
Fixed guide vane tail portion back side molded line is curve, and the first empennage side is the tangent line of fixed guide vane tail portion back side molded line,
Point of contact is the intersection point of fixed guide vane tail portion back side molded line and empennage bottom edge；Fixed guide vane tail portion front molded line is curve, the second tail
Flank side is the tangent line of fixed guide vane tail portion front molded line, and point of contact is the friendship of fixed guide vane tail portion front molded line and empennage bottom edge
Point.
The material of the empennage is identical as the material of fixed guide vane.
Working principle of the present invention is as follows：
The seat ring of reaction turbine, including upper ring plate, lower ring plate and be fixed on multiple between upper ring plate and lower ring plate
Fixed guide vane, empennage are a kind of small panel of welding equipment on fixed guide vane outlet edge, are local, and empennage, which is mounted on fixation, leads
On the outlet edge of leaf, without negative effect, fixed guide vane empennage is adopted for hydraulic characteristic(s) and mechanical performance to reaction turbine
It is trapezoidal shape with certain cross section, the excited frequency of Karman vortex street can be improved, reduce the hammer vibration energy of Karman vortex street, from
And achievees the purpose that fixed guide vane outlet Karman vortex street frequency being staggered with fixed guide vane intrinsic frequency and eliminate resonance.
Beneficial effects of the present invention are mainly manifested in following aspect：
One, of the invention, " seat ring of reaction turbine, including upper ring plate, lower ring plate and it is fixed on upper ring plate and lower ring plate
Between multiple fixed guide vanes, empennage is provided on fixed guide vane, on empennage is fixed in the middle part of the outlet edge of fixed guide vane, empennage
It is in the form of a column, the cross section of empennage is trapezoidal, is enclosed by empennage bottom edge, empennage outlet edge, the first empennage side and the second empennage side
At, the outlet edge equal length of empennage bottom edge length and fixed guide vane, empennage bottom edge is fixedly connected with the outlet edge of fixed guide vane,
Empennage bottom edge is parallel with empennage outlet edge, and empennage bottom edge length is more than empennage and is discharged edge lengths ", since empennage is a kind of welding equipment
Small panel on fixed guide vane outlet edge is local, empennage is mounted on the outlet edge of fixed guide vane, can be ensured solid
Determine the mechanical strength of guide vane, and the excited frequency of Karman vortex street can be improved, reduce the hammer vibration energy of Karman vortex street, can incite somebody to action
Fixed guide vane outlet Karman vortex street frequency is staggered with fixed guide vane intrinsic frequency, prevents that hydroelastic resonates, avoids fixing
Crackle occurs for guide vane and the hydraulic turbine generates whistle, ensures the job stability of the hydraulic turbine.
Two, of the invention, the side on empennage bottom edge is provided with the first welding groove in 45 degree, and the other side is provided with the in 45 degree
Two welding grooves, the first welding groove and the second welding groove are arranged symmetrically, and the outlet edge of empennage bottom edge and fixed guide vane passes through
It is welded to connect, influence of the site welding to fixed guide vane can not only be reduced, ensure integral strength, and live dress can be reduced
The workload of the solder tail wing.
Three, of the invention, the spacing between the upper end of empennage and the outlet edge upper end of fixed guide vane is the water outlet of fixed guide vane
The 1-5% of side height, the spacing between the lower end of empennage and the outlet edge lower end of fixed guide vane are that the outlet edge of fixed guide vane is high
The 1-5% of degree so that between the upper end of empennage and the upper ring plate of the reaction turbine and lower end of empennage and reaction turbine
Lower ring plate between be each provided with one and leave a blank distance, the intrinsic frequency of seat ring and fixed guide vane can be kept constant, raising is staggered card
The accuracy of door vortex street frequency and fixed guide vane intrinsic frequency；Distance of leaving a blank is the 1-5% of the outlet edge height of fixed guide vane, energy
Enough water outlet border regions for allowing empennage to cover fixed guide vane as much as possible along fixed guide vane short transverse.
Four, of the invention, the outlet edge of fixed guide vane and the upper end of empennage to form the first weld seam by being welded to connect, and fixation is led
The outlet edge of leaf and the lower end of empennage to form the second weld seam by being welded to connect, and can be firmly attached empennage and fixed guide vane
Together, integral strength has further been ensured.
Description of the drawings
The present invention is described in further detail with specific implementation mode with reference to the accompanying drawings of the specification, wherein：
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic cross-section of empennage of the present invention；
Fig. 3 is the schematic cross-section of the outlet edge connection of empennage of the present invention and fixed guide vane；
Fig. 4 is the structural schematic diagram that fixed guide vane is connect with empennage in the embodiment of the present invention 6；
It is marked in figure：1, upper ring plate, 2, lower ring plate, 3, fixed guide vane, 4, empennage, 5, empennage bottom edge, 6, empennage outlet edge,
7, the first empennage side, the 8, second empennage side, the 9, first welding groove, the 10, second welding groove, the 11, first weld seam, 12,
Second weld seam.
Specific implementation mode
Embodiment 1
Referring to Fig. 1 and Fig. 2, the seat ring of reaction turbine, including upper ring plate 1, lower ring plate 2 and it is fixed on 1 and of upper ring plate
Multiple fixed guide vanes 3 between lower ring plate 2 are provided with empennage 4 on the fixed guide vane 3, and empennage 4 is fixed on fixed guide vane 3
On in the middle part of outlet edge, the empennage 4 is in the form of a column, and the cross section of empennage 4 is trapezoidal, by empennage bottom edge 5, empennage outlet edge 6, first
Empennage side 7 and the second empennage side 8 surround, the outlet edge equal length of 5 length of empennage bottom edge and fixed guide vane 3, tail
Wing bottom edge 5 is fixedly connected with the outlet edge of fixed guide vane 3, and the empennage bottom edge 5 is parallel with empennage outlet edge 6, and empennage bottom edge 5
Length is more than 6 length of empennage outlet edge.
The present embodiment is most basic embodiment, " seat ring of reaction turbine, including upper ring plate, lower ring plate and solid
Due to being provided with empennage on multiple fixed guide vanes between upper ring plate and lower ring plate, fixed guide vane, empennage is fixed on fixed guide vane
Outlet edge in the middle part of on, empennage is in the form of a column, and the cross section of empennage is trapezoidal, by empennage bottom edge, empennage outlet edge, the first empennage side
Side and the second empennage side surround, the outlet edge equal length of empennage bottom edge length and fixed guide vane, and empennage bottom edge is led with fixation
The outlet edge of leaf is fixedly connected, and empennage bottom edge is parallel with empennage outlet edge, and empennage bottom edge length is more than empennage and is discharged the length of side
Degree " is local since empennage is a kind of small panel of welding equipment on fixed guide vane outlet edge, and empennage, which is mounted on fixation, leads
On the outlet edge of leaf, the mechanical strength of fixed guide vane can be ensured, and the excited frequency of Karman vortex street can be improved, reduce card
Fixed guide vane can be exported Karman vortex street frequency and be staggered with fixed guide vane intrinsic frequency, prevent from producing by the hammer vibration energy of door vortex street
Raw hydroelastic resonance avoids fixed guide vane that crackle and hydraulic turbine generation whistle occurs, ensures the job stability of the hydraulic turbine.
Embodiment 2
Referring to Fig. 1 and Fig. 3, the seat ring of reaction turbine, including upper ring plate 1, lower ring plate 2 and it is fixed on 1 and of upper ring plate
Multiple fixed guide vanes 3 between lower ring plate 2 are provided with empennage 4 on the fixed guide vane 3, and empennage 4 is fixed on fixed guide vane 3
On in the middle part of outlet edge, the empennage 4 is in the form of a column, and the cross section of empennage 4 is trapezoidal, by empennage bottom edge 5, empennage outlet edge 6, first
Empennage side 7 and the second empennage side 8 surround, the outlet edge equal length of 5 length of empennage bottom edge and fixed guide vane 3, tail
Wing bottom edge 5 is fixedly connected with the outlet edge of fixed guide vane 3, and the empennage bottom edge 5 is parallel with empennage outlet edge 6, and empennage bottom edge 5
Length is more than 6 length of empennage outlet edge.
The side on the empennage bottom edge 5 is provided with the first welding groove 9 in 45 degree, and the other side is provided with the second weldering in 45 degree
Groove 10 is connect, the first welding groove 9 and the second welding groove 10 are arranged symmetrically, and empennage bottom edge 5 and the outlet edge of fixed guide vane 3 are logical
It crosses and is welded to connect.
The present embodiment is a better embodiment, and the side on empennage bottom edge is provided with the first welding groove in 45 degree, another
Side is provided with the second welding groove in 45 degree, and the first welding groove and the second welding groove are arranged symmetrically, empennage bottom edge and fixation
The outlet edge of guide vane can not only reduce influence of the site welding to fixed guide vane by being welded to connect, and ensure integral strength, and
And the workload of live welding equipment empennage can be reduced.
Embodiment 3
Referring to Fig. 1 and Fig. 3, the seat ring of reaction turbine, including upper ring plate 1, lower ring plate 2 and it is fixed on 1 and of upper ring plate
Multiple fixed guide vanes 3 between lower ring plate 2 are provided with empennage 4 on the fixed guide vane 3, and empennage 4 is fixed on fixed guide vane 3
On in the middle part of outlet edge, the empennage 4 is in the form of a column, and the cross section of empennage 4 is trapezoidal, by empennage bottom edge 5, empennage outlet edge 6, first
Empennage side 7 and the second empennage side 8 surround, the outlet edge equal length of 5 length of empennage bottom edge and fixed guide vane 3, tail
Wing bottom edge 5 is fixedly connected with the outlet edge of fixed guide vane 3, and the empennage bottom edge 5 is parallel with empennage outlet edge 6, and empennage bottom edge 5
Length is more than 6 length of empennage outlet edge.
The side on the empennage bottom edge 5 is provided with the first welding groove 9 in 45 degree, and the other side is provided with the second weldering in 45 degree
Groove 10 is connect, the first welding groove 9 and the second welding groove 10 are arranged symmetrically, and empennage bottom edge 5 and the outlet edge of fixed guide vane 3 are logical
It crosses and is welded to connect.
The thickness of the empennage outlet edge 6 is 3 millimeters.
Spacing between the upper end of the empennage 4 and the outlet edge upper end of fixed guide vane 3 is that the outlet edge of fixed guide vane 3 is high
The 1% of degree, the spacing between the lower end of empennage 4 and the outlet edge lower end of fixed guide vane 3 are the outlet edge height of fixed guide vane 3
1%.
The present embodiment is another better embodiment.
Embodiment 4
Referring to Fig. 1 and Fig. 3, the seat ring of reaction turbine, including upper ring plate 1, lower ring plate 2 and it is fixed on 1 and of upper ring plate
Multiple fixed guide vanes 3 between lower ring plate 2 are provided with empennage 4 on the fixed guide vane 3, and empennage 4 is fixed on fixed guide vane 3
On in the middle part of outlet edge, the empennage 4 is in the form of a column, and the cross section of empennage 4 is trapezoidal, by empennage bottom edge 5, empennage outlet edge 6, first
Empennage side 7 and the second empennage side 8 surround, the outlet edge equal length of 5 length of empennage bottom edge and fixed guide vane 3, tail
Wing bottom edge 5 is fixedly connected with the outlet edge of fixed guide vane 3, and the empennage bottom edge 5 is parallel with empennage outlet edge 6, and empennage bottom edge 5
Length is more than 6 length of empennage outlet edge.
The side on the empennage bottom edge 5 is provided with the first welding groove 9 in 45 degree, and the other side is provided with the second weldering in 45 degree
Groove 10 is connect, the first welding groove 9 and the second welding groove 10 are arranged symmetrically, and empennage bottom edge 5 and the outlet edge of fixed guide vane 3 are logical
It crosses and is welded to connect.
The thickness of the empennage outlet edge 6 is 4 millimeters.
Spacing between the upper end of the empennage 4 and the outlet edge upper end of fixed guide vane 3 is that the outlet edge of fixed guide vane 3 is high
The 3% of degree, the spacing between the lower end of empennage 4 and the outlet edge lower end of fixed guide vane 3 are the outlet edge height of fixed guide vane 3
3%.
The present embodiment is another better embodiment.
Embodiment 5
Referring to Fig. 1 and Fig. 3, the seat ring of reaction turbine, including upper ring plate 1, lower ring plate 2 and it is fixed on 1 and of upper ring plate
Multiple fixed guide vanes 3 between lower ring plate 2 are provided with empennage 4 on the fixed guide vane 3, and empennage 4 is fixed on fixed guide vane 3
On in the middle part of outlet edge, the empennage 4 is in the form of a column, and the cross section of empennage 4 is trapezoidal, by empennage bottom edge 5, empennage outlet edge 6, first
Empennage side 7 and the second empennage side 8 surround, the outlet edge equal length of 5 length of empennage bottom edge and fixed guide vane 3, tail
Wing bottom edge 5 is fixedly connected with the outlet edge of fixed guide vane 3, and the empennage bottom edge 5 is parallel with empennage outlet edge 6, and empennage bottom edge 5
Length is more than 6 length of empennage outlet edge.
The side on the empennage bottom edge 5 is provided with the first welding groove 9 in 45 degree, and the other side is provided with the second weldering in 45 degree
Groove 10 is connect, the first welding groove 9 and the second welding groove 10 are arranged symmetrically, and empennage bottom edge 5 and the outlet edge of fixed guide vane 3 are logical
It crosses and is welded to connect.
The thickness of the empennage outlet edge 6 is 5 millimeters.
Spacing between the upper end of the empennage 4 and the outlet edge upper end of fixed guide vane 3 is that the outlet edge of fixed guide vane 3 is high
The 5% of degree, the spacing between the lower end of empennage 4 and the outlet edge lower end of fixed guide vane 3 are the outlet edge height of fixed guide vane 3
5%.
Multiple fixed guide vanes 3 are identical geometric dimension, and the spacing of two fixed guide vanes 3 of arbitrary neighborhood is identical.
The present embodiment is another better embodiment.
Embodiment 6
Referring to Fig. 1, Fig. 3 and Fig. 4, the seat ring of reaction turbine, including upper ring plate 1, lower ring plate 2 and it is fixed on upper ring plate
Multiple fixed guide vanes 3 between 1 and lower ring plate 2 are provided with empennage 4 on the fixed guide vane 3, and empennage 4 is fixed on fixed guide vane 3
Outlet edge in the middle part of on, the empennage 4 is in the form of a column, and the cross section of empennage 4 is trapezoidal, by empennage bottom edge 5, empennage outlet edge 6, the
One empennage side 7 and the second empennage side 8 surround, the outlet edge equal length of 5 length of empennage bottom edge and fixed guide vane 3,
Empennage bottom edge 5 is fixedly connected with the outlet edge of fixed guide vane 3, and the empennage bottom edge 5 is parallel with empennage outlet edge 6, and empennage bottom
5 length of side is more than 6 length of empennage outlet edge.
The side on the empennage bottom edge 5 is provided with the first welding groove 9 in 45 degree, and the other side is provided with the second weldering in 45 degree
Groove 10 is connect, the first welding groove 9 and the second welding groove 10 are arranged symmetrically, and empennage bottom edge 5 and the outlet edge of fixed guide vane 3 are logical
It crosses and is welded to connect.
The thickness of the empennage outlet edge 6 is 5 millimeters.
Spacing between the upper end of the empennage 4 and the outlet edge upper end of fixed guide vane 3 is that the outlet edge of fixed guide vane 3 is high
The 5% of degree, the spacing between the lower end of empennage 4 and the outlet edge lower end of fixed guide vane 3 are the outlet edge height of fixed guide vane 3
5%.
Multiple fixed guide vanes 3 are identical geometric dimension, and the spacing of two fixed guide vanes 3 of arbitrary neighborhood is identical.
The outlet edge of fixed guide vane 3 to form the first weld seam 11 with the upper end of empennage 4 by being welded to connect, fixed guide vane 3
The lower end of outlet edge and empennage 4 to form the second weld seam 12 by being welded to connect.
3 tail portion back side molded line of fixed guide vane is straight line, and the first empennage side 7 is prolonging for 3 tail portion back side molded line of fixed guide vane
Long line；3 tail portion front molded line of fixed guide vane is straight line, and the second empennage side 8 is the extension of 3 tail portion front molded line of fixed guide vane
Line.
The present embodiment is one of preferred forms.
Embodiment 7
Referring to Fig. 1, Fig. 3 and Fig. 4, the seat ring of reaction turbine, including upper ring plate 1, lower ring plate 2 and it is fixed on upper ring plate
Multiple fixed guide vanes 3 between 1 and lower ring plate 2 are provided with empennage 4 on the fixed guide vane 3, and empennage 4 is fixed on fixed guide vane 3
Outlet edge in the middle part of on, the empennage 4 is in the form of a column, and the cross section of empennage 4 is trapezoidal, by empennage bottom edge 5, empennage outlet edge 6, the
One empennage side 7 and the second empennage side 8 surround, the outlet edge equal length of 5 length of empennage bottom edge and fixed guide vane 3,
Empennage bottom edge 5 is fixedly connected with the outlet edge of fixed guide vane 3, and the empennage bottom edge 5 is parallel with empennage outlet edge 6, and empennage bottom
5 length of side is more than 6 length of empennage outlet edge.
The side on the empennage bottom edge 5 is provided with the first welding groove 9 in 45 degree, and the other side is provided with the second weldering in 45 degree
Groove 10 is connect, the first welding groove 9 and the second welding groove 10 are arranged symmetrically, and empennage bottom edge 5 and the outlet edge of fixed guide vane 3 are logical
It crosses and is welded to connect.
The thickness of the empennage outlet edge 6 is 5 millimeters.
Spacing between the upper end of the empennage 4 and the outlet edge upper end of fixed guide vane 3 is that the outlet edge of fixed guide vane 3 is high
The 5% of degree, the spacing between the lower end of empennage 4 and the outlet edge lower end of fixed guide vane 3 are the outlet edge height of fixed guide vane 3
5%.
Multiple fixed guide vanes 3 are identical geometric dimension, and the spacing of two fixed guide vanes 3 of arbitrary neighborhood is identical.
The outlet edge of fixed guide vane 3 to form the first weld seam 11 with the upper end of empennage 4 by being welded to connect, fixed guide vane 3
The lower end of outlet edge and empennage 4 to form the second weld seam 12 by being welded to connect.
3 tail portion back side molded line of fixed guide vane is curve, and the first empennage side 7 is cutting for 3 tail portion back side molded line of fixed guide vane
Line, point of contact are the intersection point of fixed guide vane 3 tail portion back side molded line and empennage bottom edge 5；3 tail portion front molded line of fixed guide vane is curve,
Second empennage side 8 is the tangent line of 3 tail portion front molded line of fixed guide vane, and point of contact is 3 tail portion front molded line of fixed guide vane and empennage
The intersection point on bottom edge 5.
The material of the empennage 4 is identical as the material of fixed guide vane 3.
The present embodiment is the two of preferred forms.
The present invention is not limited to the above embodiments.
Claims (9)
1. the seat ring of reaction turbine, including upper ring plate (1), lower ring plate (2) and it is fixed on upper ring plate (1) and lower ring plate (2)
Between multiple fixed guide vanes (3), it is characterised in that：Empennage (4) is provided on the fixed guide vane (3), empennage (4) is fixed on
On in the middle part of the outlet edge of fixed guide vane (3), the empennage (4) is in the form of a column, and the cross section of empennage (4) is trapezoidal, by empennage bottom edge
(5), empennage outlet edge (6), the first empennage side (7) and the second empennage side (8) surround, empennage bottom edge (5) length with
The outlet edge equal length of fixed guide vane (3), empennage bottom edge (5) are fixedly connected with the outlet edge of fixed guide vane (3), the empennage
Bottom edge (5) is parallel with empennage outlet edge (6), and empennage bottom edge (5) length is more than empennage outlet edge (6) length.
2. the seat ring of reaction turbine according to claim 1, it is characterised in that：The side of the empennage bottom edge (5)
It is provided with the first welding groove (9) in 45 degree, the other side is provided with the second welding groove (10) in 45 degree, the first welding groove
(9) it is arranged symmetrically with the second welding groove (10), the outlet edge of empennage bottom edge (5) and fixed guide vane (3) is by being welded to connect.
3. the seat ring of reaction turbine according to claim 1, it is characterised in that：The thickness of the empennage outlet edge (6)
Degree is 3-5 millimeters.
4. the seat ring of reaction turbine according to claim 1, it is characterised in that：The upper end of the empennage (4) with it is solid
Determine the 1-5% for the outlet edge height that the spacing between the outlet edge upper end of guide vane (3) is fixed guide vane (3), the lower end of empennage (4)
Spacing between the outlet edge lower end of fixed guide vane (3) is the 1-5% of the outlet edge height of fixed guide vane (3).
5. the seat ring of reaction turbine according to claim 1, it is characterised in that：Multiple fixed guide vanes (3) are phase
The spacing of same geometric dimension, two fixed guide vanes (3) of arbitrary neighborhood is identical.
6. the seat ring of reaction turbine according to claim 1, it is characterised in that：The outlet edge of fixed guide vane (3) with
The upper end of empennage (4) to form the first weld seam (11) by being welded to connect, the lower end of the outlet edge and empennage (4) of fixed guide vane (3)
The second weld seam (12) is formed by being welded to connect.
7. the seat ring of reaction turbine according to claim 6, it is characterised in that：Fixed guide vane (3) tail portion back-type
Line is straight line, and the first empennage side (7) is the extended line of fixed guide vane (3) tail portion back side molded line；Fixed guide vane (3) tail portion front
Molded line is straight line, and the second empennage side (8) is the extended line of fixed guide vane (3) tail portion front molded line.
8. the seat ring of reaction turbine according to claim 7, it is characterised in that：Fixed guide vane (3) tail portion back-type
Line is curve, and the first empennage side (7) is the tangent line of fixed guide vane (3) tail portion back side molded line, and point of contact is fixed guide vane (3) tail portion
The intersection point of back side molded line and empennage bottom edge (5)；Fixed guide vane (3) tail portion front molded line is curve, and the second empennage side (8) is solid
Determine the tangent line of guide vane (3) tail portion front molded line, point of contact is the intersection point of fixed guide vane (3) tail portion front molded line and empennage bottom edge (5).
9. the seat ring of reaction turbine according to claim 1, it is characterised in that：The material of the empennage (4) with it is solid
The material for determining guide vane (3) is identical.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810374133.3A CN108386304A (en) | 2018-04-24 | 2018-04-24 | The seat ring of reaction turbine |
| PCT/CN2019/083060 WO2019206004A1 (en) | 2018-04-24 | 2019-04-17 | Seat ring of reaction water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810374133.3A CN108386304A (en) | 2018-04-24 | 2018-04-24 | The seat ring of reaction turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108386304A true CN108386304A (en) | 2018-08-10 |
Family
ID=63064618
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810374133.3A Pending CN108386304A (en) | 2018-04-24 | 2018-04-24 | The seat ring of reaction turbine |
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| CN (1) | CN108386304A (en) |
| WO (1) | WO2019206004A1 (en) |
Cited By (3)
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| WO2019206004A1 (en) * | 2018-04-24 | 2019-10-31 | 东方电气集团东方电机有限公司 | Seat ring of reaction water turbine |
| WO2019206009A1 (en) * | 2018-04-24 | 2019-10-31 | 东方电气集团东方电机有限公司 | Method for preventing cracks caused by resonance of fixed guide vanes of reaction water turbine |
| CN113375901A (en) * | 2021-05-14 | 2021-09-10 | 东方电气集团科学技术研究院有限公司 | Method for testing vortex street frequency and flow velocity between tubes of flow-induced vibration of tube bundle structure |
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| CN114526392B (en) * | 2022-02-10 | 2023-09-22 | 国网福建省电力有限公司电力科学研究院 | Vortex band eliminating device for mixing of draft tube |
| CN117889029B (en) * | 2024-03-15 | 2024-05-24 | 东方电气集团东方电机有限公司 | Water turbine top cover and water turbine |
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