CN102084089B - Blade cascade for a flow engine and flow engine comprising said blade cascade - Google Patents
Blade cascade for a flow engine and flow engine comprising said blade cascade Download PDFInfo
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- CN102084089B CN102084089B CN200980126997.2A CN200980126997A CN102084089B CN 102084089 B CN102084089 B CN 102084089B CN 200980126997 A CN200980126997 A CN 200980126997A CN 102084089 B CN102084089 B CN 102084089B
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- chord length
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- maximum height
- inlet edge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
Abstract
The present invention relates to an improved blade cascade for a flow engine, especially a steam turbine, comprising a plurality of profiled blades, especially profiled rotor blades (1), having an intake side (SS), a pressure side (DS), a median line (Sk) and a chord length (s) between a blade leading edge and a blade trailing edge, said chord length having different geometrical quotients according to the claims.
Description
Technical field
The present invention relates to a kind of leaf grating for fluid machinery, especially for steam turbine, it comprises multiple shaping (profiliert) blade, be shaping moving vane (Laufschaufel) especially, described shaping moving vane comprise suction side, on the pressure side, bone line (Skelettlinie), blade inlet edge and trailing edge, the invention still further relates to a kind of fluid machinery with this leaf grating.
Background technique
In fluid machinery (such as steam turbine), especially, compressible fluid (such as steam) be diverted and by one or more leaf grating and thus on leaf grating applying power.If this leaf grating is movable, this fluid drives this moving blades and thus acting.In order to make fluid turn to, above the moving vane in downstream, also can be provided with fixing what is called guiding leaf grating especially.
For leaf grating now, in particular for the moving vane of steam turbine, there is the acceleration of significant fluid in (this flow channel on the pressure side and between the suction side of along the circumferential direction adjacent blade being defined at blade) in flow channel, the static pressure of this fluid is corresponding obviously less after the leaf grating turned to, thus this fluid expands in flow channel.
The blade angle of present use, the i.e. angle that sandwiches of the tangent line at blade inlet edge and trailing edge place and circumferencial direction, in the scope between 64 ° to 72 °.Here the chord length between blade inlet edge and trailing edge reaches 63mm, and division scale, the suction side of namely adjacent blade parallel to the axis direction tangent line between distance along the circumferential direction and the business of chord length reach scope between 0.85 to 1.1.For this reason, the inflow angle entering to flow to circumferencial direction of desirable blade inlet edge according to using scope between 37 ° and 47 °, and trailing edge go out to flow in the scope of angle between 21 ° and 29 °, itself and inflow angle are significantly different.
This known leaf grating is not optimal.
Summary of the invention
The object of the invention is, improve the leaf grating being used for fluid machinery.
This object is realized by the leaf grating with the feature of claim 1,5 or 6.Claim 10 protects the fluid machinery with this leaf grating, and dependent claims relates to favourable further structure.
Leaf grating for fluid machinery (such as steam turbine plant or combustion gas turbine, pressurized machine etc.) has multiple formed blades, described formed blades comprise suction side, on the pressure side, bone line and chord length, this formed blades is along the circumferential direction disposed adjacent one another.
Direction describes the rotor as " circumferencial direction ", " radial direction " and " axial direction " reference fluid machinery in the art.Generally call preferably in the axial direction and/or the bending line of radial direction with bone line or (section) center line (or line of apsides), it is with suction side and on the pressure side have identical distance, namely in cross section just in time on the pressure side and between suction side.The section profile of blade is symmetrical about its bone line.In other words, bone line is the line in the center of circle of making in section.Suction side or be on the pressure side by two of moving vane cross section along the circumferential direction isolated outer surface limit, this moving vane cross section orthogonal is in radial direction.
This leaf grating such as can form the one-level of steam turbine as moving blades.In this case, suction side and on the pressure side preferably along turbine rotor sense of rotation protrude and bend, wherein suction side is positioned on the pressure side front along sense of rotation, such as, thus the fluid flowed by turbine is made leaf grating and therefore makes the turbine rotor of this leaf grating of carrying rotate with acting along sense of rotation, drives the generator be coupled with turbine rotor.
The string of blade, its leading edge circle (Voderkantenkreis) and the tangent line at trailing edge circle (Hinterkantenkreis) place, can tilt in relative axis direction especially.As long as do not provide in addition, highly to describe and distance describes with reference to bitangent system, one bar axis being parallel in the string of blade, and its another axis and blade inlet edge tangent, thus be such as defined as the distance with string highly in cross section.The corresponding distance described along string between the blade inlet edge of the upstream of the flow direction of the fluid flowed by fluid machinery in edge and the trailing edge in downstream of chord length.
Basis of the present invention recognizes that leaf grating can be modified when the ratio of completely specified blade height, blade circle and/or vane curvature and chord length is in certain, default scope.When one or more blade height, one or more blade circle or one or more vane curvature---with reference to chord length---, when being positioned at scope given below, just obtain favourable leaf grating.When one or more blade height and blade circle, one or more blade height and vane curvature, one or more blade circle and vane curvature and especially one or more blade height, blade circle and vane curvature in this range time, particularly advantageous leaf grating can be realized.
Here to below blade height, blade circle or being described in of vane curvature all the time with reference at least one cross section perpendicular to radial direction.If being on the pressure side parallel to radial direction with suction side and extending of blade, then each blade profile develops along radial direction by being positioned at the pure flat displacement in the cross section at inner root of blade place in the radial direction, and this explanation is correspondingly effective to all cross sections.Equally, on the pressure side and/or suction side can also along radial direction bend, so wherein at least one cross section (such as at root of blade, at vane tip and/or in the cross section in the middle part of the blade of radial direction), one or more blade height, blade circle and/or vane curvature---with reference to chord length---should be positioned at scope given below.
Correspondingly, propose according to a first aspect of the invention, suction side has maximum height in cross section, in the business of this maximum height and the chord length scope between 0.52 to 0.56---especially between 0.53 and 0.55.Additionally or alternatively, on the pressure side in cross section there is maximum height, in the business of this maximum height and the chord length scope between 0.18 to 0.22---especially between 0.19 to 0.21.Additionally or alternatively propose, bone line has maximum height in cross section, in the business of this maximum height and the chord length scope between 0.35 to 0.39---especially between 0.36 to 0.38.Advantageously, suction side, on the pressure side with the maximum height of at least two in bone line correspondingly in the scope provided, particularly preferably, suction side, on the pressure side with the maximum height of bone line all correspondingly in the scope provided.
Here, as height, as previously outlined, in cross section, refer to the shortest distance of the connecting line segment between the starting point of the axial direction of side or bone line and bone line and terminal especially, the distance of the tangent line especially justified with leading edge circle and trailing edge.
Preferably, the maximum height---especially between 0.40 and 0.42---reaching it in the scope of suction side between 0.39 to 0.43 is measured and reference chord length from blade inlet edge in the bitangent system of blade.In other words, in the cross section of blade according to the present invention, maximum extended length is preferably at about 0.40 to 0.42 times of chord length place---measure from blade profile point foremost in the axial direction along string.
By corresponding mode, in the scope on the pressure side preferably between 0.50 to 0.54, reach its maximum height---especially between 0.51 to 0.53---from blade inlet edge measurement and with reference to chord length in the bitangent system of blade.The maximum height---especially between 0.42 to 0.44---of occupying it in the scope of bone line preferably between 0.41 to 0.45 is measured and reference chord length from blade inlet edge in the bitangent system of blade.
According to a second aspect of the invention, additional or alternatively to propose in aforementioned first aspect, suction side and on the pressure side between the greatest circle drawn, with reference to chord length, there is the diameter in the scope between 0.33 to 0.36---especially between 0.34 to 0.36, and/or the centre distance (measuring from blade inlet edge in the bitangent system of blade) had in the scope between 0.36 to 0.40---especially between 0.37 to 0.39, and/or the depth of section (measuring from string) had in the scope between 0.34 to 0.38---especially between 0.35 to 0.37, diameter in the scope that leading edge circle (with reference to chord length) has between 0.024 to 0.046 is also proposed---especially between 0.025 to 0.045, and/or propose, trailing edge circle (with reference to chord length) has the diameter in the scope between 0.099 to 0.021---especially between 0.01 to 0.02.
On the pressure side and between suction side can draw circle, its center of circle is positioned on bone line, and is connected on the pressure side or suction side in it.One maximum in this circle forms the greatest circle drawn.The leading edge of blade or trailing edge are preferably defined as blade profile and on the pressure side have radius of curvature that is round corresponding to leading edge or trailing edge radius of a circle with the transition portion of suction side by leading edge circle or trailing edge circle.
According to a third aspect of the invention we, additional or alternatively to propose in aforementioned first and/or second aspect, suction side has and radius of curvature the business of the chord length scope between 0.38 to 0.42 in the distance (in the bitangent system at blade from blade inlet edge measure) of 0.1 times of chord length---especially between 0.39 to 0.41, and/or have and radius of curvature in the business of the chord length scope between 0.82 to 0.86 in the distance of the axial direction of 0.75 times of chord length---especially between 0.83 to 0.85, and/or on the pressure side have and radius of curvature the business of the chord length scope between 0.73 to 0.77 in the axial direction distance (in the bitangent system at blade from blade inlet edge measure) of 0.15 times of chord length---especially between 0.74 to 0.76, and/or have and radius of curvature in the business of the chord length scope between 0.54 to 0.58 in the axial direction distance of 0.80 times of chord length---especially between 0.55 to 0.57.
Advantageously, for the leaf grating according to first, second and/or the third aspect, medium is substantially only diverted and is not accelerated significantly, thus only has little reduction at the pressure of leaf grating front and back.Advantageously, also can along on the pressure side obtaining less separation with suction side
boundary layer flow and/or larger flow divert, namely make the impact be delivered to leaf grating from fluid increase.Thus the efficiency of flowing grid can be improved, in particular for the steam turbine controlled stage (Regelstufe) of usually only part loading, turn to and can advantageously work and not have significant pressure to reduce.Another advantage is, can more easily manufacture according to leaf grating of the present invention, especially can milling and do not have be in the way shifting process (Umsetzvorgang).
Preferably, string or blade inlet edge sandwich into so-called blade angle with the tangent line of trailing edge with circumferencial direction, in the scope of this blade angle between 73 ° to 83 °---especially between 74 ° to 82 °, this compares traditional blade angle equally advantageously affects efficiency.
Preferably, for leaf grating according to the present invention, in the distance of the tangent line in the direction of paralleling to the axis of the suction side of along the circumferential direction adjacent blade and the scope of the division scale of chord length between 0.70 to 0.79---especially between 0.71 to 0.78.If the circumference extended length of section is less than separation, then do not need root shape (Fu β form) or the platform (Plattform) of rhombus, this work in-process is favourable especially in (vorzuhaltend) instrument to be maintained and material stock (Bestand).
By little division scale, can have higher blade quantity for identical chord length (be preferably up to 70mm, be up to 63mm especially), this not only advantageously improves intensity, and due to improve intensity also allow higher mass flow.In a form of implementation of the present invention, blade quantity can improve about 20% for identical chord length.
Advantageously, the incoming flow angle entering to flow to axial direction of the blade inlet edge of more precipitous (steil) can be realized for fluid machinery according to the present invention
or inflow angle
it especially can in the scope between 26 ° to 36 °---preferably between 27 ° to 37 °.Advantageously, the flowing of the eddy current that band is larger is therefore, it is possible to processed before blades installation.Utilization can reduce the pressure peak in front edge area especially according to leaf grating of the present invention.
Accompanying drawing explanation
Further advantage and feature are provided by dependent claims and embodiment.Wherein (display of Some illustrative ground):
Fig. 1 shows the perspective view of the moving vane of the leaf grating according to a form of implementation of the present invention;
Fig. 2 shows perpendicular to the moving vane according to Fig. 1 in the section II-II of radial direction, and it comprises characteristic blade height in bitangent system and characteristic blade circle;
Fig. 3 shows according to the moving vane of Fig. 1 view corresponding to Fig. 2, and it comprises characteristic blade curvature; And
Fig. 4 shows the corresponding sectional view according to two of the leaf grating of Fig. 1 along the circumferential direction adjacent moving vanes.
Embodiment
Fig. 1 shows the shaping moving vane 1 of the leaf grating according to form of implementation of the present invention, and it is with cloverleaf pin.Radial direction r, circumferencial direction U and axial direction a is painted with in order to orientation.
Fig. 2 shows the section II-II (comparison diagram 1) of moving vane perpendicular to radial direction r, it comprises characteristic blade height in bitangent system and characteristic blade circle, and the axis of this bitangent system correspondingly sandwiches into axial direction or circumferencial direction the blade angle β will set forth further below
s.Here the first axle (in fig. 2 from left to right) of bitangent system---size below describes with reference to this bitangent system---is parallel to the string 5 of moving vane 1, namely leading edge circle and trailing edge circle 3 is tangential on, 4, second axis (in fig. 2 from bottom to up) is tangential on leading edge.Other unshowned moving vane is the same in its size.
Moving vane 1 has along the forward suction side SS (above Fig. 1) of sense of rotation, along sense of rotation on the pressure side DS rearward and bone line Sk, this bone line Sk at each point with suction side with on the pressure side have identical distance, be namely just in time positioned in cross section on the pressure side with suction side in the middle of.
The chord length of the string 5 between blade inlet edge and trailing edge is 60mm.Because favourable blade described below circle, blade height and bending blade have the predetermined ratio with this chord length according to the present invention, so this chord length 3 to be standardized as " 1 " in Fig. 2 and Tu.
Suction side SS has the maximum height f from string 5 in cross section
sS, measure in bitangent system, the business f of itself and chord length s
sS/ s is 0.54.On the pressure side DS has maximum height f in cross section
dS, the business f of itself and chord length s
dS/ s is 0.20.Bone line Sk has maximum height f in cross section
sk, the business f of itself and chord length s
sk/ s is 0.37:
f
SS/s＝0.54，
f
Sk/s＝0.37，
f
DS/s＝0.20。
Suction side SS is at position X
fSSthere is its maximum height f
sS, this position X
fSSreference chord length s is 0.41---along string 5 (in fig. 2 from left to right) measurement from blade inlet edge in bitangent system.In other words, ratio X
fSS/ s is 0.41.On the pressure side DS is at axial direction position X
fDSreach its maximum height f
dS, axial direction position X
fDSreference chord length s is 0.52.Bone line Sk is at axial direction position X
fSkthere is its maximum height f
sk, this position X
fSkreference chord length s is 0.43.
X
fSS/s＝0.41，
X
fSk/s＝0.43，
X
fDS/s＝0.52。
Suction side and on the pressure side between the greatest circle 2 drawn there is the diameter D of (referring again to chord length s) 0.35
max/ s, its center of circle has the distance X of 0.38 bitangent system from blade inlet edge along string 5
dmax/ s, has the height f of 0.36 from string 5
xDmax.Leading edge circle 3 has the diameter D of (with reference to chord length s) 0.035
e/ s, trailing edge circle 4 has the diameter D of 0.015
a/ s:
D
max/s＝0.35；X
Dmax/s＝0.38；f
xDmax/s＝0.36，
D
e/s＝0.035，
D
a/s＝0.015。
As shown in Figure 3, suction side SS is at the distance X of 0.1 times of chord length s in the axial direction
rkSS0.1place's (measuring along string 5 from blade inlet edge) has radius of curvature R
kSS0.1, the business R of itself and chord length s
kSS0.1/ s is 0.40.At the distance X of 0.75 times of chord length s
rkSS0.75place, radius of curvature R
kSS0.75with the business R of chord length s
kSS0.75/ s is 0.84.
X
RkSS0.1/s＝0.1；R
kSS0.1/s＝0.40
X
RkSS0.75/s＝0.75；R
kSS0.75/s＝0.84。
On the pressure side, business R
kDS0.15/ s is 0.75, this business R
kDS0.15/ s is radius of curvature R
kDS0.15at the distance X of the chord length s of 0.15 times
rkDS0.15place's---measuring along string 5 from blade inlet edge---and string 5 are formed, radius of curvature R
kDS0.80business R
kDS0.80/ s is at the distance X of 0.80 times of chord length s in the axial direction
rkDS0.8place is 0.56.
X
RkDS0.15/s＝0.15；R
kDS0.15/s＝0.75，
X
RkDS0.80/s＝0.80；R
kDS0.80/s＝0.56。
String 5 or blade inlet edge sandwich into blade angle β with the tangent line of trailing edge with circumferencial direction U
s, this blade angle β
smark in the diagram and be 78 °.The distance t (comparison diagram 4) of the tangent line in the direction of paralleling to the axis of the suction side SS of along the circumferential direction adjacent blade and the division scale t/s of chord length s are 0.74.
Becoming a mandarin and the inflow angle β of circumferencial direction of the blade inlet edge indicated by arrow in the diagram
1be 32 °, go out to flow angle beta accordingly
2it is 25 °.
list of numerals
1 moving vane
The 2 maximum circles drawn
3 leading edge circles
4 trailing edge circles
5 strings
SS suction side
DS on the pressure side
Sk bone line
Claims (26)
1. the leaf grating for fluid machinery, described leaf grating comprises multiple formed blades, described shaping moving vane (1) comprises suction side (SS), on the pressure side (DS), bone line (Sk) and the chord length (s) between blade inlet edge and trailing edge, it is characterized in that
Described suction side (SS) has maximum height (f in cross section
ss), this maximum height (f
ss) with the business (f of chord length (s)
ss/ s) in scope between 0.52 to 0.56, and/or
Described on the pressure side (DS) has maximum height (f in cross section
dS), this maximum height (f
dS) with the business (f of chord length (s)
dS/ s) in scope between 0.18 to 0.22, and/or
Described bone line (Sk) has maximum height (f in cross section
sk), this maximum height (f
sk) with the business (f of chord length (s)
sk/ s) in scope between 0.35 to 0.39.
2. leaf grating according to claim 1, is characterized in that, described suction side (SS) measure from blade inlet edge and with reference to chord length (s), scope (X between 0.39 to 0.43
fSS/ s) in there is its maximum height (f
sS).
3. the leaf grating according to any one of the claims 1 to 2, is characterized in that, described on the pressure side (DS) measure from blade inlet edge and with reference to chord length (s), scope (X between 0.50 to 0.54
fDS/ s) in there is its maximum height (f
dS).
4. the leaf grating according to any one of the claims 1 to 2, is characterized in that, described bone line (Sk) measure from blade inlet edge and with reference to chord length (s), scope (X between 0.41 to 0.45
fSk/ s) in there is its maximum height (f
sk).
5. the leaf grating according to any one of the claims 1 to 2, is characterized in that,
Suction side and on the pressure side between the greatest circle drawn, with reference to chord length (s), there is the diameter (D in the scope between 0.33 to 0.36
max/ s), and/or there is the centre distance (X measured from blade inlet edge scope between 0.36 to 0.40
dmax/ s), and/or there is the center height (f in the cross section in the scope between 0.34 to 0.38
xDmax/ s), and/or
Leading edge circle (3), with reference to chord length (s), has the diameter (D in the scope between 0.024 to 0.046
e/ s), and/or
Trailing edge circle (4), with reference to chord length (s), has the diameter (D in the scope between 0.099 to 0.021
a/ s).
6. the leaf grating according to any one of the claims 1 to 2, is characterized in that,
Described suction side (SS) is at the distance (X of the 0.1 times of chord length (s) measured from blade inlet edge
rkSS0.1) place has radius of curvature (R
kSS0.1), the business (R of itself and chord length (s)
kSS0.1/ s) in scope between 0.38 to 0.42, and/or at the distance (X of the 0.75 times of chord length (s) measured from blade inlet edge
rkSS0.75) place has radius of curvature (R
kSS0.75), the business (R of itself and chord length (s)
kSS0.75/ s) in scope between 0.82 to 0.86, and/or
Described on the pressure side (DS) is at the distance (X of the 0.15 times of chord length (s) measured from blade inlet edge
rkDS0.15) place has radius of curvature (R
kDS0.15), the business (R of itself and chord length (s)
kDS0.15/ s) in scope between 0.73 to 0.77, and/or at the distance (X of the 0.80 times of chord length (s) measured from blade inlet edge
rkDS0.8) place has radius of curvature (R
kDS0.80), the business (R of itself and chord length (s)
kDS0.80/ s) in scope between 0.54 to 0.58.
7. the leaf grating according to any one of the claims 1 to 2, is characterized in that, the string (5) of described moving vane (1) and the circumferencial direction (U) of the rotor of reference fluid machinery sandwich into blade angle (
s), in its scope between 73 ° to 83 °.
8. the leaf grating according to any one of the claims 1 to 2, is characterized in that, described chord length (s) is less than or equal to 70mm.
9. the leaf grating according to any one of the claims 1 to 2, it is characterized in that, along the distance (t) of the tangent line paralleled to the axis of the suction side (SS) of the adjacent blade of the circumferencial direction (U) of the rotor of reference fluid machinery and the division scale (t/s) of chord length (s) in the scope between 0.70 to 0.79.
10. the leaf grating according to any one of the claims 1 to 2, is characterized in that, described fluid machinery is steam turbine.
11. leaf gratings according to any one of the claims 1 to 2, it is characterized in that, described formed blades is shaping moving vane (1).
12. leaf gratings according to any one of the claims 1 to 2, is characterized in that,
Described suction side (SS) has maximum height (f in cross section
ss), this maximum height (f
ss) with the business (f of chord length (s)
ss/ s) in scope between 0.53 to 0.55, and/or
Described on the pressure side (DS) has maximum height (f in cross section
dS), this maximum height (f
dS) with the business (f of chord length (s)
dS/ s) in scope between 0.19 to 0.21, and/or
Described bone line (Sk) has maximum height (f in cross section
sk), this maximum height (f
sk) with the business (f of chord length (s)
sk/ s) in scope between 0.36 to 0.38.
13. leaf gratings according to claim 1, is characterized in that, described suction side (SS) measure from blade inlet edge and with reference to chord length (s), scope (X between 0.40 to 0.42
fSS/ s) in there is its maximum height (f
sS).
14. leaf gratings according to any one of the claims 1 to 2, is characterized in that, described on the pressure side (DS) measure from blade inlet edge and with reference to chord length (s), scope (X between 0.51 to 0.53
fDS/ s) in there is its maximum height (f
dS).
15. leaf gratings according to any one of the claims 1 to 2, is characterized in that, described bone line (Sk) measure from blade inlet edge and with reference to chord length (s), scope (X between 0.42 to 0.44
fSk/ s) in there is its maximum height (f
sk).
16. leaf gratings according to any one of the claims 1 to 2, is characterized in that,
Suction side and on the pressure side between the greatest circle drawn, with reference to chord length (s), there is the diameter (D in the scope between 0.34 to 0.36
max/ s), and/or there is the centre distance (X measured the scope of 0.37 to 0.39 from blade inlet edge
dmax/ s), and/or there is the center height (f in the cross section in the scope between 0.35 to 0.37
xDmax/ s), and/or
Leading edge circle (3), with reference to chord length (s), has the diameter (D in the scope between 0.025 to 0.045
e/ s), and/or
Trailing edge circle (4), with reference to chord length (s), has the diameter (D in the scope of 0.01 to 0.02
a/ s).
17. leaf gratings according to any one of the claims 1 to 2, is characterized in that,
Described suction side (SS) is at the distance (X of the 0.1 times of chord length (s) measured from blade inlet edge
rkSS0.1) place has radius of curvature (R
kSS0.1), the business (R of itself and chord length (s)
kSS0.1/ s) in scope between 0.39 to 0.41, and/or at the distance (X of the 0.75 times of chord length (s) measured from blade inlet edge
rkSS0.75) place has radius of curvature (R
kSS0.75), the business (R of itself and chord length (s)
kSS0.75/ s) in scope between 0.83 to 0.85, and/or
Described on the pressure side (DS) is at the distance (X of the 0.15 times of chord length (s) measured from blade inlet edge
rkDS0.15) place has radius of curvature (R
kDS0.15), the business (R of itself and chord length (s)
kDS0.15/ s) in scope between 0.74 to 0.76, and/or at the distance (X of the 0.80 times of chord length (s) measured from blade inlet edge
rkDS0.8) place has radius of curvature (R
kDS0.80), the business (R of itself and chord length (s)
kDS0.80/ s) in scope between 0.55 to 0.57.
18. leaf gratings according to any one of the claims 1 to 2, is characterized in that, the string (5) of described moving vane (1) and the circumferencial direction (U) of the rotor of reference fluid machinery sandwich into blade angle (
s), they are between 74 ° to 82 ° in scope.
19. leaf gratings according to any one of the claims 1 to 2, it is characterized in that, described chord length (s) is less than or equal to 63mm.
20. leaf gratings according to any one of the claims 1 to 2, it is characterized in that, along the distance (t) of the tangent line paralleled to the axis of the suction side (SS) of the adjacent blade of the circumferencial direction (U) of the rotor of reference fluid machinery and the division scale (t/s) of chord length (s) in the scope between 0.71 to 0.78.
21. 1 kinds of fluid machineries, it comprises at least one leaf grating according to any one of the claims 1 to 20.
22. fluid machineries according to claim 21, is characterized in that, blade inlet edge enter to flow to the circumferencial direction of the rotor of reference fluid machinery inflow angle (
1) in scope between 26 ° to 38 °.
23. fluid machineries according to claim 21 or 22, is characterized in that, trailing edge go out to flow to the circumferencial direction of the rotor of reference fluid machinery go out to flow angle (
2) in scope between 20 ° to 30 °.
24. fluid machineries according to claim 21 or 22, it is characterized in that, described fluid machinery is steam turbine.
25. fluid machineries according to claim 21 or 22, is characterized in that, blade inlet edge enter to flow to the circumferencial direction of the rotor of reference fluid machinery inflow angle (
1) in scope between 27 ° to 37 °.
26. fluid machineries according to claim 21 or 22, is characterized in that, trailing edge go out to flow to the circumferencial direction of the rotor of reference fluid machinery go out to flow angle (
2) in scope between 21 ° to 29 °.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008031781.0 | 2008-07-04 | ||
| DE102008031781.0A DE102008031781B4 (en) | 2008-07-04 | 2008-07-04 | Blade grille for a turbomachine and turbomachine with such a blade grille |
| PCT/DE2009/000876 WO2010000229A2 (en) | 2008-07-04 | 2009-06-24 | Blade cascade for a flow engine and flow engine comprising said blade cascade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102084089A CN102084089A (en) | 2011-06-01 |
| CN102084089B true CN102084089B (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200980126997.2A Active CN102084089B (en) | 2008-07-04 | 2009-06-24 | Blade cascade for a flow engine and flow engine comprising said blade cascade |
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| Country | Link |
|---|---|
| EP (1) | EP2294285A2 (en) |
| JP (1) | JP5478617B2 (en) |
| CN (1) | CN102084089B (en) |
| DE (1) | DE102008031781B4 (en) |
| WO (1) | WO2010000229A2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2796526T3 (en) | 2010-11-30 | 2020-11-27 | Mtu Aero Engines Gmbh | Vane system for an aircraft engine |
| CN110727995B (en) * | 2018-06-29 | 2023-09-22 | 中国航发商用航空发动机有限责任公司 | Blade shape construction method, blade, and computer device |
| CN113342314B (en) * | 2021-05-28 | 2023-08-18 | 西安交通大学 | Supercritical carbon dioxide working medium axial flow turbine design system and method |
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| US2258795A (en) * | 1941-06-14 | 1941-10-14 | Westinghouse Electric & Mfg Co | Elastic-fluid turbine |
| US5352092A (en) * | 1993-11-24 | 1994-10-04 | Westinghouse Electric Corporation | Light weight steam turbine blade |
| EP1225303A2 (en) * | 2001-01-12 | 2002-07-24 | Mitsubishi Heavy Industries, Ltd. | Blade structure in a gas turbine |
| CN1386958A (en) * | 2001-05-18 | 2002-12-25 | 株式会社日立制作所 | Blade of turbine and turbine |
| EP1300547A2 (en) * | 2001-10-05 | 2003-04-09 | General Electric Company | Transonic turbine airfoil arrangement |
| US6666654B2 (en) * | 2000-08-14 | 2003-12-23 | Honda Giken Kogyo Kabushiki Kaisha | Turbine blade airfoil and turbine blade for axial-flow turbine |
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| IE54653B1 (en) * | 1982-10-22 | 1989-12-20 | Westinghouse Electric Corp | Rotor blade for the first stage of a combustion turbine |
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| JPH0441256Y2 (en) * | 1985-01-31 | 1992-09-28 | ||
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| JPH0454203A (en) * | 1990-06-22 | 1992-02-21 | Toshiba Corp | Turbine rotor blade and turbine cascade |
| US5286168A (en) * | 1992-01-31 | 1994-02-15 | Westinghouse Electric Corp. | Freestanding mixed tuned blade |
| JP3867812B2 (en) * | 1995-07-17 | 2007-01-17 | 石川島播磨重工業株式会社 | Axial compressor blade |
| JP3402176B2 (en) * | 1998-01-19 | 2003-04-28 | 株式会社日立製作所 | Blades for turbomachinery |
| JP2000045704A (en) * | 1998-07-31 | 2000-02-15 | Toshiba Corp | Steam turbine |
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2008
- 2008-07-04 DE DE102008031781.0A patent/DE102008031781B4/en not_active Revoked
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- 2009-06-24 EP EP09771999A patent/EP2294285A2/en not_active Withdrawn
- 2009-06-24 JP JP2011513872A patent/JP5478617B2/en active Active
- 2009-06-24 CN CN200980126997.2A patent/CN102084089B/en active Active
- 2009-06-24 WO PCT/DE2009/000876 patent/WO2010000229A2/en active Application Filing
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| US2258795A (en) * | 1941-06-14 | 1941-10-14 | Westinghouse Electric & Mfg Co | Elastic-fluid turbine |
| US5352092A (en) * | 1993-11-24 | 1994-10-04 | Westinghouse Electric Corporation | Light weight steam turbine blade |
| US6666654B2 (en) * | 2000-08-14 | 2003-12-23 | Honda Giken Kogyo Kabushiki Kaisha | Turbine blade airfoil and turbine blade for axial-flow turbine |
| EP1225303A2 (en) * | 2001-01-12 | 2002-07-24 | Mitsubishi Heavy Industries, Ltd. | Blade structure in a gas turbine |
| CN1386958A (en) * | 2001-05-18 | 2002-12-25 | 株式会社日立制作所 | Blade of turbine and turbine |
| EP1300547A2 (en) * | 2001-10-05 | 2003-04-09 | General Electric Company | Transonic turbine airfoil arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102084089A (en) | 2011-06-01 |
| DE102008031781B4 (en) | 2020-06-10 |
| DE102008031781A1 (en) | 2010-01-07 |
| EP2294285A2 (en) | 2011-03-16 |
| WO2010000229A3 (en) | 2010-08-19 |
| JP2011524490A (en) | 2011-09-01 |
| JP5478617B2 (en) | 2014-04-23 |
| WO2010000229A2 (en) | 2010-01-07 |
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