[go: up one dir, main page]

WO2019206004A1 - 反击式水轮机的座环 - Google Patents

反击式水轮机的座环 Download PDF

Info

Publication number
WO2019206004A1
WO2019206004A1 PCT/CN2019/083060 CN2019083060W WO2019206004A1 WO 2019206004 A1 WO2019206004 A1 WO 2019206004A1 CN 2019083060 W CN2019083060 W CN 2019083060W WO 2019206004 A1 WO2019206004 A1 WO 2019206004A1
Authority
WO
WIPO (PCT)
Prior art keywords
tail
fixed
vane
water outlet
fixed vane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/083060
Other languages
English (en)
French (fr)
Inventor
石清华
龚莉
龚英
周小南
刘辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongfang Electric Machinery Co Ltd DEC
Original Assignee
Dongfang Electric Machinery Co Ltd DEC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongfang Electric Machinery Co Ltd DEC filed Critical Dongfang Electric Machinery Co Ltd DEC
Publication of WO2019206004A1 publication Critical patent/WO2019206004A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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

Definitions

  • the invention relates to the technical field of water turbines, and in particular to a seat ring of a counter-turbine.
  • the fixed vane of the counter-turbine has two functions. First, as a flow-through component, the water flow from the turbine volute is evenly introduced into the movable vane; secondly, as a force-receiving component, the weight of the entire hydro-generator set Passed to the concrete foundation. Due to advances in the hydraulic design technology of counter-turbine turbines, the fixed vanes designed with the latest technology rarely suffer from hydroelastic resonance problems. However, there are two reasons for this phenomenon to occur occasionally on some of the putative counter-turbine turbines.
  • the existing hydraulic design technology is still difficult to accurately predict the frequency of the fixed vane outlet Kamen vortex street;
  • the large size of the counter-turbine and the reduction of the thickness of the fixed vane reduce the stiffness of the fixed vane, thereby reducing the natural frequency of the fixed vane, increasing the coincidence of the fixed vane outlet Karman vortex frequency and the natural frequency.
  • the possibility of resonance Once this resonance occurs, howling will occur during turbine operation and cause fixed guide vane cracks in a short period of time.
  • the formation of the Karman vortex street is mainly due to the poor design of the fixed vane profile line, the flow separation occurs near the positive and the back outlets of the fixed vane, and the flow separation vortices of the front and back sides are staggered.
  • the method of increasing the frequency of the Karman vortex street not only staggered the coincidence with the natural frequency of the fixed vane, but also greatly reduced the energy of the Karman vortex street.
  • the frequency of the Karman vortex street increases, the energy of the vortex street is greatly weakened, thereby greatly reducing The possibility of the resonance of the Kamen vortex street.
  • the most common method is to modify the back surface of the fixed vane, and modify the profile of the back surface of the fixed vane near the water outlet edge of the fixed vane, and thin and fixed.
  • the thickness of the water guide edge of the guide vane reduces the outflow of the fixed guide vane water outlet, reduces the wake width of the dewatering point at the outlet of the fixed guide vane, increases the frequency of the Karman vortex street, and reduces the energy of the vortex street, thereby achieving the purpose of eliminating resonance.
  • this type of repair method has the following disadvantages.
  • the repair amount of the fixed guide vane tail is difficult to determine, that is, The repair of the fixed vane water outlet can not be ensured. In many cases, it is necessary to carry out multiple repairs to completely eliminate the resonance problem caused by Kamen vortex. The project implementation is difficult, the cycle is long, and the cost is high.
  • fixed The guide vane is the most important force-receiving part of the counter-turbine. The repair of the fixed vane outlet will reduce the mechanical strength of the fixed vane.
  • the modification of the fixed guide vane will change the fixed vane. The natural frequency, which is also a new uncertainty for the wrong frequency band between the Karman vortex excitation frequency and the fixed vane natural frequency.
  • a fixed guide vane an upper fixing ring and an upper fixing ring welded to the upper ring plate, and a lower fixing ring and a lower fixing ring welded to the lower ring plate, wherein the upper fixing ring and the upper fixing ring are welded on
  • the lower end surface of the ring plate is welded with an annular baffle on the outer circumference of the upper fixing ring, and the rib plate is uniformly welded between the annular baffle plate and the upper ring plate; the lower fixing ring and the lower fixing ring are welded to the upper end surface of the lower ring plate
  • An annular baffle is welded on the outer circumference of the lower fixing ring, and the rib plate is uniformly welded between the annular baffle and the lower ring plate.
  • the Chinese Patent Publication No. CN 204646509U discloses a hydro turbine seat ring assembly comprising: an upper copper ring, an upper transition plate, an upper ring plate, a lower ring plate, a lower copper ring, The lower transition plate, the upper copper ring and the upper transition plate are disposed on the upper ring plate, and the lower copper ring and the lower transition plate are disposed on the lower ring plate, wherein the utility model further comprises: a fixed guide vane and a middle ring plate combination, wherein the middle ring plate combination comprises The upper layer and the lower layer board are further provided with a connecting fixing strip between the upper layer board and the lower layer board, and the middle ring board group is disposed between the upper ring board and the lower ring board, and the upper layer board and the lower layer board are respectively provided with the fixed guide vanes passing through.
  • the limiting hole has a fixed guide vane passing through the limiting hole, and the edges of the fixed guide vane and the limiting hole are also fixed by welding
  • the fixed vane outlet Karman vortex frequency on the seat ring easily coincides with the natural frequency of the fixed vane, resulting in hydroelastic resonance, causing cracks in the fixed vane, and the entire turbine produces howling, which greatly affects the working stability of the turbine.
  • the present invention provides a seat ring of a counter-type turbine, and the invention can improve the excitation frequency of the Karman vortex street, reduce the excitation energy of the Karman vortex street, and can vortex the fixed vane outlet.
  • the street frequency is offset from the natural frequency of the fixed vane to prevent hydroelastic resonance, avoid cracking of the fixed vane and whistling of the turbine, and ensure the working stability of the turbine.
  • the seat ring of the counter-turbine includes an upper ring plate, a lower ring plate and a plurality of fixed guide vanes fixed between the upper ring plate and the lower ring plate, wherein the fixed guide vanes are provided with a tail fin, and the tail fin is fixed In the middle of the outlet side of the fixed vane, the tail fin is columnar, and the cross section of the tail fin is trapezoidal, surrounded by the bottom edge of the tail fin, the tail water outlet side, the first tail side and the second tail side, the tail bottom
  • the length of the side edge is equal to the length of the water outlet side of the fixed vane, and the bottom edge of the tail fin is fixedly connected with the water outlet side of the fixed vane.
  • the bottom edge of the tail fin is parallel to the water outlet side of the tail fin, and the length of the bottom edge of the tail fin is greater than the length of the tail water outlet side.
  • One side of the bottom edge of the tail wing is opened with a first welding groove of 45 degrees, and the other side is opened with a second welding groove of 45 degrees.
  • the first welding groove and the second welding groove are symmetrically arranged, and the tail is symmetrical.
  • the bottom edge and the outlet edge of the fixed vane are connected by welding.
  • the thickness of the tail water outlet is 3-5 mm.
  • the distance between the upper end of the tail fin and the upper end of the water outlet side of the fixed vane is 1-5% of the height of the water outlet side of the fixed vane, and the distance between the lower end of the tail vane and the lower end of the water outlet side of the fixed vane is a fixed vane.
  • the height of the water side is 1-5%.
  • the plurality of fixed vanes are all of the same geometrical size, and the spacing of any two adjacent fixed vanes is the same.
  • the water outlet side of the fixed vane and the upper end of the tail fin are welded to form a first weld seam, and the water outlet side of the fixed vane and the lower end of the tail fin are welded to form a second weld seam.
  • the rear side of the fixed guide vane is a straight line, and the side of the first tail is an extension of the back line of the fixed vane tail; the front line of the fixed vane tail is a straight line, and the side of the second tail is a fixed guide tail tail type line Extension line.
  • the back side of the fixed vane tail is a curve
  • the side of the first tail is the tangent of the back line of the fixed vane tail
  • the tangent point is the intersection of the back type line of the fixed vane tail and the bottom side of the tail
  • the side of the second tail is the tangent of the front line of the fixed vane tail
  • the tangent point is the intersection of the front line of the fixed vane tail and the bottom side of the tail.
  • the material of the tail fin is the same as the material of the fixed vane.
  • the seat ring of the counter-turbine includes an upper ring plate, a lower ring plate and a plurality of fixed vanes fixed between the upper ring plate and the lower ring plate, the tail fin being a small inlay mounted on the water outlet edge of the fixed vane
  • the strip is partial, and the tail is mounted on the water outlet side of the fixed vane, which has no negative influence on the hydraulic characteristics and mechanical properties of the counter-turbine.
  • the fixed vane tail adopts a trapezoidal shape with a specific cross section, which can improve the Karman
  • the excitation frequency of the vortex street reduces the excitation energy of the Karman vortex street, so as to achieve the purpose of staggering the fixed vane outlet Karman vortex frequency and the fixed vane natural frequency to eliminate resonance.
  • a seat ring of a counter-attack turbine comprising an upper ring plate, a lower ring plate and a plurality of fixed guide vanes fixed between the upper ring plate and the lower ring plate, the fixed guide vanes are provided with a tail fin, and the tail fin is fixed In the middle of the outlet side of the fixed vane, the tail is column-shaped, and the cross section of the tail is trapezoidal. It is surrounded by the bottom edge of the tail, the water outlet of the tail, the side of the first tail and the side of the second tail. The length of the bottom of the tail is fixed.
  • the outlet edges of the guide vanes are of equal length, and the bottom edge of the tail fin is fixedly connected with the water outlet edge of the fixed vane.
  • the bottom edge of the tail fin is parallel to the water outlet side of the tail fin, and the length of the bottom edge of the tail fin is greater than the length of the tail water outlet side, because the tail fin is a type of welding
  • the small strip on the water outlet side of the fixed vane is partial.
  • the tail fin is mounted on the water outlet side of the fixed vane, which can ensure the mechanical strength of the fixed vane, and can increase the excitation frequency of the Karman vortex street and reduce the Karman vortex.
  • the excitation energy of the street can shift the frequency of the fixed vane outlet Karman vortex from the natural frequency of the fixed vane to prevent hydroelastic resonance, avoid cracks in the fixed vane and whistling of the turbine.
  • the working stability of the turbine is the working stability of the turbine.
  • the present invention has a first welding groove of 45 degrees on one side of the bottom edge of the tail wing and a second welding groove of 45 degrees on the other side, and the first welding groove and the second welding groove are symmetric. Arrangement, the bottom edge of the tail wing and the water outlet edge of the fixed vane are welded, which not only reduces the influence of the field welding on the fixed vane, but also ensures the overall strength, and can reduce the workload of the field welding tail.
  • the distance between the upper end of the empennage and the upper end of the outlet side of the fixed vane is 1-5% of the height of the outlet side of the fixed vane
  • the distance between the lower end of the empennage and the lower end of the outlet side of the fixed vane is The height of the water outlet side of the fixed vane is 1-5%, so that the upper end of the empennage and the upper ring plate of the counter-turbine and the lower end of the empennage and the lower ring plate of the counter-turbine have a gap between each, which can maintain the seat ring.
  • the natural frequency of the fixed vane is constant, and the accuracy of staggering the Karman vortex frequency and the natural frequency of the fixed vane is improved;
  • the blanking distance is 1-5% of the height of the water outlet side of the fixed vane, and can be along the height of the fixed vane Let the tail cover as much as possible over the water outlet area of the fixed vane.
  • the water outlet side of the fixed vane and the upper end of the tail fin are joined by welding to form a first weld seam, and the water outlet side of the fixed vane and the lower end of the tail fin are welded to form a second weld seam, and the tail fin and the fixed vane can be fixed. They are firmly connected to further protect the overall strength.
  • Figure 1 is a schematic view of the structure of the present invention
  • Figure 2 is a schematic cross-sectional view of the tail of the present invention.
  • Figure 3 is a schematic cross-sectional view showing the water outlet of the tail fin and the fixed vane of the present invention
  • Embodiment 6 is a schematic structural view of a fixed vane and a tail fin connected in Embodiment 6 of the present invention
  • the seat ring of the counter-turbine includes an upper ring plate 1, a lower ring plate 2, and a plurality of fixed vanes 3 fixed between the upper ring plate 1 and the lower ring plate 2, the fixed guide
  • the blade 3 is provided with a tail 4 which is fixed on the middle of the outlet side of the fixed vane 3, the tail 4 is columnar, the cross section of the tail 4 is trapezoidal, and the bottom edge of the tail wing 5, the tail water outlet edge 6, the first The tail side 7 and the second tail side 8 are enclosed, the length of the tail bottom 5 is equal to the length of the water outlet side of the fixed vane 3, and the tail bottom 5 is fixedly connected with the water outlet of the fixed vane 3, the tail The bottom edge 5 is parallel to the tail water outlet edge 6, and the length of the tail bottom edge 5 is greater than the length of the tail water outlet edge 6.
  • the seat ring of the counter-attack turbine includes an upper ring plate, a lower ring plate and a plurality of fixed guide vanes fixed between the upper ring plate and the lower ring plate, and are arranged on the fixed guide vanes.
  • There is a tail fin the tail fin is fixed on the middle of the outlet side of the fixed vane, the tail fin is columnar, and the cross section of the tail fin is trapezoidal, surrounded by the bottom edge of the tail fin, the tail water outlet side, the first tail side and the second tail side, and the tail fin.
  • the length of the bottom edge is equal to the length of the water outlet side of the fixed vane, and the bottom edge of the tail fin is fixedly connected with the water outlet side of the fixed vane.
  • the bottom edge of the tail fin is parallel to the water outlet side of the tail fin, and the length of the bottom edge of the tail fin is greater than the length of the tail water outlet side, because the tail fin is A small strip mounted on the side of the water outlet of the fixed vane is partial.
  • the tail fin is mounted on the water outlet side of the fixed vane, which can ensure the mechanical strength of the fixed vane and can enhance the excitation of the Karman vortex street. Frequency, reduce the excitation energy of Karman vortex street, can shift the fixed vane outlet Karman vortex frequency and the fixed guide vane natural frequency, prevent hydroelastic resonance, avoid cracks and water wheel of fixed guide vane Howling, guarantee job stability turbines.
  • the seat ring of the counter-turbine includes an upper ring plate 1, a lower ring plate 2, and a plurality of fixed vanes 3 fixed between the upper ring plate 1 and the lower ring plate 2, the fixed guide
  • the blade 3 is provided with a tail 4 which is fixed on the middle of the outlet side of the fixed vane 3, the tail 4 is columnar, the cross section of the tail 4 is trapezoidal, and the bottom edge of the tail wing 5, the tail water outlet edge 6, the first The tail side 7 and the second tail side 8 are enclosed, the length of the tail bottom 5 is equal to the length of the water outlet side of the fixed vane 3, and the tail bottom 5 is fixedly connected with the water outlet of the fixed vane 3, the tail The bottom edge 5 is parallel to the tail water outlet edge 6, and the length of the tail bottom edge 5 is greater than the length of the tail water outlet edge 6.
  • One side of the bottom edge 5 of the tail is opened with a first welding groove 9 of 45 degrees, and the other side is opened with a second welding groove 10 of 45 degrees, the first welding groove 9 and the second welding groove 10 is symmetrically arranged, the bottom edge 5 of the tail and the water outlet of the fixed vane 3 are connected by welding.
  • one side of the bottom edge of the tail wing is opened with a first welding groove of 45 degrees, and the other side is provided with a second welding groove of 45 degrees, the first welding groove and the first
  • the second welding groove is symmetrically arranged, and the bottom edge of the tail wing and the water outlet edge of the fixed vane are welded, which not only reduces the influence of the field welding on the fixed vane, but also ensures the overall strength, and can reduce the workload of the field welding tail.
  • the seat ring of the counter-turbine includes an upper ring plate 1, a lower ring plate 2, and a plurality of fixed vanes 3 fixed between the upper ring plate 1 and the lower ring plate 2, the fixed guide
  • the blade 3 is provided with a tail 4 which is fixed on the middle of the outlet side of the fixed vane 3, the tail 4 is columnar, the cross section of the tail 4 is trapezoidal, and the bottom edge of the tail wing 5, the tail water outlet edge 6, the first The tail side 7 and the second tail side 8 are enclosed, the length of the tail bottom 5 is equal to the length of the water outlet side of the fixed vane 3, and the tail bottom 5 is fixedly connected with the water outlet of the fixed vane 3, the tail The bottom edge 5 is parallel to the tail water outlet edge 6, and the length of the tail bottom edge 5 is greater than the length of the tail water outlet edge 6.
  • One side of the bottom edge 5 of the tail is opened with a first welding groove 9 of 45 degrees, and the other side is opened with a second welding groove 10 of 45 degrees, the first welding groove 9 and the second welding groove 10 is symmetrically arranged, the bottom edge 5 of the tail and the water outlet of the fixed vane 3 are connected by welding.
  • the tail water outlet 6 has a thickness of 3 mm.
  • the distance between the upper end of the empennage 4 and the upper end of the water outlet side of the fixed vane 3 is 1% of the height of the water outlet side of the fixed vane 3, and the distance between the lower end of the empennage 4 and the lower end of the outlet side of the fixed vane 3 is The height of the water outlet side of the vane 3 is fixed at 1%.
  • This embodiment is still another preferred embodiment.
  • the seat ring of the counter-turbine includes an upper ring plate 1, a lower ring plate 2, and a plurality of fixed vanes 3 fixed between the upper ring plate 1 and the lower ring plate 2, the fixed guide
  • the blade 3 is provided with a tail 4 which is fixed on the middle of the outlet side of the fixed vane 3, the tail 4 is columnar, the cross section of the tail 4 is trapezoidal, and the bottom edge of the tail wing 5, the tail water outlet edge 6, the first The tail side 7 and the second tail side 8 are enclosed, the length of the tail bottom 5 is equal to the length of the water outlet side of the fixed vane 3, and the tail bottom 5 is fixedly connected with the water outlet of the fixed vane 3, the tail The bottom edge 5 is parallel to the tail water outlet edge 6, and the length of the tail bottom edge 5 is greater than the length of the tail water outlet edge 6.
  • One side of the bottom edge 5 of the tail is opened with a first welding groove 9 of 45 degrees, and the other side is opened with a second welding groove 10 of 45 degrees, the first welding groove 9 and the second welding groove 10 is symmetrically arranged, the bottom edge 5 of the tail and the water outlet of the fixed vane 3 are connected by welding.
  • the tail water outlet 6 has a thickness of 4 mm.
  • the distance between the upper end of the tail fin 4 and the upper end of the water outlet side of the fixed vane 3 is 3% of the height of the water outlet side of the fixed vane 3, and the distance between the lower end of the tail vane 4 and the lower end of the outlet side of the fixed vane 3 is The height of the water outlet side of the fixed vane 3 is 3%.
  • This embodiment is still another preferred embodiment.
  • the seat ring of the counter-turbine includes an upper ring plate 1, a lower ring plate 2, and a plurality of fixed vanes 3 fixed between the upper ring plate 1 and the lower ring plate 2, the fixed guide
  • the blade 3 is provided with a tail 4 which is fixed on the middle of the outlet side of the fixed vane 3, the tail 4 is columnar, the cross section of the tail 4 is trapezoidal, and the bottom edge of the tail wing 5, the tail water outlet edge 6, the first The tail side 7 and the second tail side 8 are enclosed, the length of the tail bottom 5 is equal to the length of the water outlet side of the fixed vane 3, and the tail bottom 5 is fixedly connected with the water outlet of the fixed vane 3, the tail The bottom edge 5 is parallel to the tail water outlet edge 6, and the length of the tail bottom edge 5 is greater than the length of the tail water outlet edge 6.
  • One side of the bottom edge 5 of the tail is opened with a first welding groove 9 of 45 degrees, and the other side is opened with a second welding groove 10 of 45 degrees, the first welding groove 9 and the second welding groove 10 is symmetrically arranged, the bottom edge 5 of the tail and the water outlet of the fixed vane 3 are connected by welding.
  • the tail water outlet 6 has a thickness of 5 mm.
  • the distance between the upper end of the tail fin 4 and the upper end of the water outlet side of the fixed vane 3 is 5% of the height of the water outlet side of the fixed vane 3, and the distance between the lower end of the tail vane 4 and the lower end of the outlet side of the fixed vane 3 is The height of the water outlet side of the fixed vane 3 is 5%.
  • the plurality of fixed vanes 3 are all of the same geometrical size, and the spacing of any two adjacent fixed vanes 3 is the same.
  • This embodiment is still another preferred embodiment.
  • the seat ring of the counter-turbine includes an upper ring plate 1 , a lower ring plate 2 and a plurality of fixed guide vanes 3 fixed between the upper ring plate 1 and the lower ring plate 2 .
  • the fixed vane 3 is provided with a tail 4 which is fixed on the middle of the outlet side of the fixed vane 3, the tail 4 is columnar, and the cross section of the tail 4 is trapezoidal, and the bottom edge of the tail wing 5 and the tail water outlet side 6 a first tail side 7 and a second tail side 8 are defined.
  • the length of the tail bottom 5 is equal to the length of the outlet side of the fixed vane 3, and the bottom edge 5 of the tail is fixedly connected to the water outlet of the fixed vane 3.
  • the tail bottom edge 5 is parallel to the tail water outlet edge 6, and the tail bottom edge 5 length is greater than the tail wing water outlet edge 6 length.
  • One side of the bottom edge 5 of the tail is opened with a first welding groove 9 of 45 degrees, and the other side is opened with a second welding groove 10 of 45 degrees, the first welding groove 9 and the second welding groove 10 is symmetrically arranged, the bottom edge 5 of the tail and the water outlet of the fixed vane 3 are connected by welding.
  • the tail water outlet 6 has a thickness of 5 mm.
  • the distance between the upper end of the tail fin 4 and the upper end of the water outlet side of the fixed vane 3 is 5% of the height of the water outlet side of the fixed vane 3, and the distance between the lower end of the tail vane 4 and the lower end of the outlet side of the fixed vane 3 is The height of the water outlet side of the fixed vane 3 is 5%.
  • the plurality of fixed vanes 3 are all of the same geometrical size, and the spacing of any two adjacent fixed vanes 3 is the same.
  • the water outlet side of the fixed vane 3 and the upper end of the empennage 4 are joined by welding to form a first weld bead 11, and the water outlet side of the fixed vane 3 and the lower end of the empennage 4 are joined by welding to form a second weld bead 12.
  • the rear guide line of the fixed vane 3 is a straight line
  • the first tail side 7 is an extension line of the rear side profile of the fixed vane 3
  • the front guide line of the fixed vane 3 is a straight line
  • the second tail side 8 is a fixed guide.
  • This embodiment is one of the best embodiments.
  • the seat ring of the counter-turbine includes an upper ring plate 1 , a lower ring plate 2 and a plurality of fixed guide vanes 3 fixed between the upper ring plate 1 and the lower ring plate 2 .
  • the fixed vane 3 is provided with a tail 4 which is fixed on the middle of the outlet side of the fixed vane 3, the tail 4 is columnar, and the cross section of the tail 4 is trapezoidal, and the bottom edge of the tail wing 5 and the tail water outlet side 6 a first tail side 7 and a second tail side 8 are defined.
  • the length of the tail bottom 5 is equal to the length of the outlet side of the fixed vane 3, and the bottom edge 5 of the tail is fixedly connected to the water outlet of the fixed vane 3.
  • the tail bottom edge 5 is parallel to the tail water outlet edge 6, and the tail bottom edge 5 length is greater than the tail wing water outlet edge 6 length.
  • One side of the bottom edge 5 of the tail is opened with a first welding groove 9 of 45 degrees, and the other side is opened with a second welding groove 10 of 45 degrees, the first welding groove 9 and the second welding groove 10 is symmetrically arranged, the bottom edge 5 of the tail and the water outlet of the fixed vane 3 are connected by welding.
  • the tail water outlet 6 has a thickness of 5 mm.
  • the distance between the upper end of the tail fin 4 and the upper end of the water outlet side of the fixed vane 3 is 5% of the height of the water outlet side of the fixed vane 3, and the distance between the lower end of the tail vane 4 and the lower end of the outlet side of the fixed vane 3 is The height of the water outlet side of the fixed vane 3 is 5%.
  • the plurality of fixed vanes 3 are all of the same geometrical size, and the spacing of any two adjacent fixed vanes 3 is the same.
  • the water outlet side of the fixed vane 3 and the upper end of the empennage 4 are joined by welding to form a first weld bead 11, and the water outlet side of the fixed vane 3 and the lower end of the empennage 4 are joined by welding to form a second weld bead 12.
  • the rear guide line of the fixed vane 3 is a curve
  • the first tail side 7 is a tangent to the back type line of the fixed vane 3, and the tangent point is the intersection of the rear end type line of the fixed vane 3 and the bottom side 5 of the tail fin
  • the front line of the tail of the leaf 3 is a curve
  • the side 8 of the second tail is a tangent to the front line of the tail of the fixed vane 3, and the tangent point is the intersection of the front line of the fixed vane 3 and the bottom line 5 of the tail.
  • the material of the tail fin 4 is the same as the material of the fixed vane 3.
  • This embodiment is the second preferred embodiment.
  • the invention is not limited to the above embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Turbines (AREA)

Abstract

一种反击式水轮机的座环，包括上环板(1)、下环板(2)和固定于上环板(1)和下环板(2)之间的多个固定导叶(3)，固定导叶(3)上设置有尾翼(4)，尾翼(4)固定在固定导叶(3)的出水边中部上，尾翼(4)呈柱状，尾翼(4)的横截面呈梯形，由尾翼底边(5)、尾翼出水边(6)、第一尾翼侧边(7)和第二尾翼侧边(8)围成，尾翼底边(5)长度与固定导叶(3)的出水边长度相等，尾翼底边(5)与固定导叶(3)的出水边固定连接，尾翼底边(5)与尾翼出水边(6)平行，且尾翼底边(5)长度大于尾翼出水边(6)长度。该座环能够提高卡门涡街的激振频率，防止产生水力弹性共振，避免固定导叶发生裂纹和水轮机产生啸声。

Description

反击式水轮机的座环 技术领域
本发明涉及到水轮机技术领域，尤其涉及一种反击式水轮机的座环。
背景技术
反击式水轮机的固定导叶具有两个功能，其一，作为过流部件，将来自水轮机蜗壳的水流均匀地导入活动导叶；其二，作为受力部件，将整个水轮发电机组的重量传递到混凝土基础上。由于反击式水轮机水力设计技术的进步，采用最新技术设计的固定导叶很少出现水力弹性共振问题。但有两个原因仍使这一共振现象在一些已投运的反击式水轮机上偶有发生，一是现有的水力设计技术还难于对固定导叶出口卡门涡街的频率进行准确预测；二是反击式水轮机的大型化和固定导叶厚度的减小使得固定导叶的刚度降低，从而降低了固定导叶的固有频率，增大了固定导叶出口卡门涡街频率与固有频率重合而产生共振的可能性。一旦出现这种共振，水轮机运行中将出现啸声，并在很短的时间内造成固定导叶裂纹。
卡门涡街的形成主要是固定导叶型线设计不良，在固定导叶正、背面出口附近产生流动分离，正、背面的流动分离涡呈交错脱落所致。卡门涡街的频率为
Figure PCTCN2019083060-appb-000001
其中fk为卡门涡街频率Hz；S为斯特鲁哈数，它与雷诺数有关，在反击式水轮机中，S＝0.18～0.24；V为边界层外的主流速度m/s；t为脱流的尾迹宽度m，该尾迹宽度为固定导叶出水边厚度、正面边界层厚度、背面边界层厚度三者之和。一旦固定导叶出口卡门涡街频率与固定导叶在水下的低阶固有频率相等或相近，就会出现水力弹性共振。要消除此共振，理论上只需将两种频率错开即可，即要么提高卡门涡街频率，要么提高固定导叶的固有频率。而从已投运反击式水轮机工程实践的可行性上讲，通过增加固定导叶刚度来提高其固有频率变得十分困难。因此，在现有技术中，通常不采用改变固定导叶固有频率的方法，而主要采用提高固定导叶出口卡门涡街频率的方法来消除这种共振。采用提高卡门涡街频率的方法不仅错开了与固定导叶固有频率重合，还能大大降低卡门涡街的能量，因为卡门涡街频率一旦提高，其涡街的能量将大大削弱，从而极大地降低了卡门涡街激起共振的可能性。
现有技术中，为了提高固定导叶出口卡门涡街频率，最常用的方法是对固定导叶背面进行修型，通过修改固定导叶出水边附近固定导叶背面的型线，并减薄固定导叶出水边的厚度，减少固定导叶出水边脱流，降低固定导叶出水边脱流点尾迹宽度，提高卡门涡街频率，降低涡街能量，从而 达到消除共振的目的。然而采用这种修型方法却存在以下缺点，其一，由于卡门涡街频率和固定导叶固有频率理论上很难准确给出，因此固定导叶尾部的修型量很难确定，也就是说，对固定导叶出水边进行修型不能确保一蹴而就，很多情况下需要进行多次修型才能彻底消除卡门涡街引起的共振问题，工程实施难度大，周期长，成本也高；其二，固定导叶是反击式水轮机最重要的受力部件，对固定导叶出水边进行修型多少会降低固定导叶的机械强度；其三，对固定导叶出水边进行修型多少会改变固定导叶的固有频率，这也为卡门涡街激振频率与固定导叶固有频率之间的错频带来了新的不确定性。
公开号为CN 201047332Y，公开日为2008年04月16日的中国专利文献公开了一种水轮机座环，包括上环板和下环板、周向均布焊接在上环板和下环板之间的一个个固定导叶、与上环板焊接的上固定圈和上固定环、与下环板焊接的下固定圈和下固定环，其特征是：所述上固定圈和上固定环焊接在上环板的下端面，上固定环外圆上焊接有环形导流板，环形导流板与上环板之间均布焊接有筋板；下固定圈和下固定环焊接在下环板的上端面，下固定环外圆上焊接有环形导流板，环形导流板与下环板之间均布焊接有筋板。
公开号为CN 204646509U，公开日为2015年09月16日的中国专利文献公开了一种水轮机座环组件，包括：上铜环、上过渡板、上环板、下环板、下铜环、下过渡板，上铜环及上过渡板设于上环板上，下铜环及下过渡板设于下环板上，其特征在于：还包括固定导叶及中环板组合，中环板组合包括上层板及下层板，上层板与下层板之间还设有连接固定条，中环板组合设于上环板与下环板之间，上层板及下层板均设有让固定导叶穿过的限位孔，固定导叶穿过限位孔，且固定导叶与限位孔的边缘还通过焊接固定，且两端分别焊接固定于上环板及下环板。
以上述专利文献为代表的现有技术，均存在如下缺陷：
座环上的固定导叶出口卡门涡街频率与固定导叶固有频率容易重合，产生水力弹性共振，致使固定导叶发生裂纹，整个水轮机产生啸声，极大地影响水轮机的工作稳定性。
发明内容
本发明为了克服上述现有技术的缺陷，提供一种反击式水轮机的座环，本发明能够提高卡门涡街的激振频率，降低卡门涡街的激振能量，能够将固定导叶出口卡门涡街频率与固定导叶固有频率错开，防止产生水力弹性共振，避免固定导叶发生裂纹和水轮机产生啸声，保障水轮机的工作稳定性。
本发明通过下述技术方案实现：
反击式水轮机的座环，包括上环板、下环板和固定于上环板和下环板之间的多个固定导叶，其特征在于：所述固定导叶上设置有尾翼，尾翼固定在固定导叶的出水边中部上，所述尾翼呈柱状，尾翼的横截面呈梯形，由尾翼底边、尾翼出水边、第一尾翼侧边和第二尾翼侧边围成，所述尾翼底边长度与固定导叶的出水边长度相等，尾翼底边与固定导叶的出水边固定连接，所述尾翼底边与尾翼出水边平行，且尾翼底边长度大于尾翼出水边长度。
所述尾翼底边的一侧开有呈45度的第一焊接坡口，另一侧开有呈45度的第二焊接坡口，第一焊接坡口和第二焊接坡口对称布置，尾翼底边与固定导叶的出水边通过焊接连接。
所述尾翼出水边的厚度为3-5毫米。
所述尾翼的上端与固定导叶的出水边上端之间的间距为固定导叶的出水边高度的1-5％，尾翼的下端与固定导叶的出水边下端之间的间距为固定导叶的出水边高度的1-5％。
多个固定导叶均为相同几何尺寸，任意相邻两个固定导叶的间距相同。
固定导叶的出水边与尾翼的上端通过焊接连接形成第一焊缝，固定导叶的出水边与尾翼的下端通过焊接连接形成第二焊缝。
固定导叶尾部背面型线为直线，第一尾翼侧边为固定导叶尾部背面型线的延长线；固定导叶尾部正面型线为直线，第二尾翼侧边为固定导叶尾部正面型线的延长线。
固定导叶尾部背面型线为曲线，第一尾翼侧边为固定导叶尾部背面型线的切线，切点为固定导叶尾部背面型线与尾翼底边的交点；固定导叶尾部正面型线为曲线，第二尾翼侧边为固定导叶尾部正面型线的切线，切点为固定导叶尾部正面型线与尾翼底边的交点。
所述尾翼的材质与固定导叶的材质相同。
本发明的工作原理如下：
反击式水轮机的座环，包括上环板、下环板和固定于上环板和下环板之间的多个固定导叶，尾翼是一种装焊在固定导叶出水边上的小镶条，是局部的，将尾翼安装在固定导叶的出水边上，其对反击式水轮机的水力特性和机械性能均无负面影响，固定导叶尾翼采用特定横截面为梯形的形状，能够提高卡门涡街的激振频率，降低卡门涡街的激振能量，从而达到将固定导叶出口卡门涡街频率与固定导叶固有频率错开消除共振的目的。
本发明的有益效果主要表现在以下方面：
一、本发明，“反击式水轮机的座环，包括上环板、下环板和固定于上环板和下环板之间的多个固定导叶，固定导叶上设置有尾翼，尾翼固定在固定导叶的出水边中部上，尾翼呈柱状，尾翼的横截面呈梯形，由尾翼底 边、尾翼出水边、第一尾翼侧边和第二尾翼侧边围成，尾翼底边长度与固定导叶的出水边长度相等，尾翼底边与固定导叶的出水边固定连接，尾翼底边与尾翼出水边平行，且尾翼底边长度大于尾翼出水边长度”，由于尾翼是一种装焊在固定导叶出水边上的小镶条，是局部的，将尾翼安装在固定导叶的出水边上，能够保障固定导叶的机械强度，而且能够提高卡门涡街的激振频率，降低卡门涡街的激振能量，能够将固定导叶出口卡门涡街频率与固定导叶固有频率错开，防止产生水力弹性共振，避免固定导叶发生裂纹和水轮机产生啸声，保障水轮机的工作稳定性。
二、本发明，尾翼底边的一侧开有呈45度的第一焊接坡口，另一侧开有呈45度的第二焊接坡口，第一焊接坡口和第二焊接坡口对称布置，尾翼底边与固定导叶的出水边通过焊接连接，不仅能够减少现场焊接对固定导叶的影响，保障整体强度，而且能够减小现场装焊尾翼的工作量。
三、本发明，尾翼的上端与固定导叶的出水边上端之间的间距为固定导叶的出水边高度的1-5％，尾翼的下端与固定导叶的出水边下端之间的间距为固定导叶的出水边高度的1-5％，使得尾翼的上端与反击式水轮机的上环板间以及尾翼的下端与反击式水轮机的下环板间各自具备一留空距离，能够保持座环及固定导叶的固有频率不变，提高错开卡门涡街频率和固定导叶固有频率的准确性；留空距离为固定导叶的出水边高度的1-5％，能够沿固定导叶高度方向让尾翼尽可能多地覆盖固定导叶的出水边区域。
四、本发明，固定导叶的出水边与尾翼的上端通过焊接连接形成第一焊缝，固定导叶的出水边与尾翼的下端通过焊接连接形成第二焊缝，能够将尾翼与固定导叶牢固地连接在一起，进一步保障了整体强度。
附图说明
下面结合说明书附图和具体实施方式对本发明作进一步的具体说明，其中：
图1为本发明的结构示意图；
图2为本发明尾翼的截面示意图；
图3为本发明尾翼与固定导叶的出水边连接的截面示意图；
图4为本发明实施例6中固定导叶与尾翼连接的结构示意图；
图中标记：1、上环板，2、下环板，3、固定导叶，4、尾翼，5、尾翼底边，6、尾翼出水边，7、第一尾翼侧边，8、第二尾翼侧边，9、第一焊接坡口，10、第二焊接坡口，11、第一焊缝，12、第二焊缝。
具体实施方式
实施例1
参见图1和图2，反击式水轮机的座环，包括上环板1、下环板2和固定于上环板1和下环板2之间的多个固定导叶3，所述固定导叶3上设置 有尾翼4，尾翼4固定在固定导叶3的出水边中部上，所述尾翼4呈柱状，尾翼4的横截面呈梯形，由尾翼底边5、尾翼出水边6、第一尾翼侧边7和第二尾翼侧边8围成，所述尾翼底边5长度与固定导叶3的出水边长度相等，尾翼底边5与固定导叶3的出水边固定连接，所述尾翼底边5与尾翼出水边6平行，且尾翼底边5长度大于尾翼出水边6长度。
本实施例为最基本的实施方式，“反击式水轮机的座环，包括上环板、下环板和固定于上环板和下环板之间的多个固定导叶，固定导叶上设置有尾翼，尾翼固定在固定导叶的出水边中部上，尾翼呈柱状，尾翼的横截面呈梯形，由尾翼底边、尾翼出水边、第一尾翼侧边和第二尾翼侧边围成，尾翼底边长度与固定导叶的出水边长度相等，尾翼底边与固定导叶的出水边固定连接，尾翼底边与尾翼出水边平行，且尾翼底边长度大于尾翼出水边长度”，由于尾翼是一种装焊在固定导叶出水边上的小镶条，是局部的，将尾翼安装在固定导叶的出水边上，能够保障固定导叶的机械强度，而且能够提高卡门涡街的激振频率，降低卡门涡街的激振能量，能够将固定导叶出口卡门涡街频率与固定导叶固有频率错开，防止产生水力弹性共振，避免固定导叶发生裂纹和水轮机产生啸声，保障水轮机的工作稳定性。
实施例2
参见图1和图3，反击式水轮机的座环，包括上环板1、下环板2和固定于上环板1和下环板2之间的多个固定导叶3，所述固定导叶3上设置有尾翼4，尾翼4固定在固定导叶3的出水边中部上，所述尾翼4呈柱状，尾翼4的横截面呈梯形，由尾翼底边5、尾翼出水边6、第一尾翼侧边7和第二尾翼侧边8围成，所述尾翼底边5长度与固定导叶3的出水边长度相等，尾翼底边5与固定导叶3的出水边固定连接，所述尾翼底边5与尾翼出水边6平行，且尾翼底边5长度大于尾翼出水边6长度。
所述尾翼底边5的一侧开有呈45度的第一焊接坡口9，另一侧开有呈45度的第二焊接坡口10，第一焊接坡口9和第二焊接坡口10对称布置，尾翼底边5与固定导叶3的出水边通过焊接连接。
本实施例为一较佳实施方式，尾翼底边的一侧开有呈45度的第一焊接坡口，另一侧开有呈45度的第二焊接坡口，第一焊接坡口和第二焊接坡口对称布置，尾翼底边与固定导叶的出水边通过焊接连接，不仅能够减少现场焊接对固定导叶的影响，保障整体强度，而且能够减小现场装焊尾翼的工作量。
实施例3
参见图1和图3，反击式水轮机的座环，包括上环板1、下环板2和固定于上环板1和下环板2之间的多个固定导叶3，所述固定导叶3上设置 有尾翼4，尾翼4固定在固定导叶3的出水边中部上，所述尾翼4呈柱状，尾翼4的横截面呈梯形，由尾翼底边5、尾翼出水边6、第一尾翼侧边7和第二尾翼侧边8围成，所述尾翼底边5长度与固定导叶3的出水边长度相等，尾翼底边5与固定导叶3的出水边固定连接，所述尾翼底边5与尾翼出水边6平行，且尾翼底边5长度大于尾翼出水边6长度。
所述尾翼底边5的一侧开有呈45度的第一焊接坡口9，另一侧开有呈45度的第二焊接坡口10，第一焊接坡口9和第二焊接坡口10对称布置，尾翼底边5与固定导叶3的出水边通过焊接连接。
所述尾翼出水边6的厚度为3毫米。
所述尾翼4的上端与固定导叶3的出水边上端之间的间距为固定导叶3的出水边高度的1％，尾翼4的下端与固定导叶3的出水边下端之间的间距为固定导叶3的出水边高度的1％。
本实施例为又一较佳实施方式。
实施例4
参见图1和图3，反击式水轮机的座环，包括上环板1、下环板2和固定于上环板1和下环板2之间的多个固定导叶3，所述固定导叶3上设置有尾翼4，尾翼4固定在固定导叶3的出水边中部上，所述尾翼4呈柱状，尾翼4的横截面呈梯形，由尾翼底边5、尾翼出水边6、第一尾翼侧边7和第二尾翼侧边8围成，所述尾翼底边5长度与固定导叶3的出水边长度相等，尾翼底边5与固定导叶3的出水边固定连接，所述尾翼底边5与尾翼出水边6平行，且尾翼底边5长度大于尾翼出水边6长度。
所述尾翼底边5的一侧开有呈45度的第一焊接坡口9，另一侧开有呈45度的第二焊接坡口10，第一焊接坡口9和第二焊接坡口10对称布置，尾翼底边5与固定导叶3的出水边通过焊接连接。
所述尾翼出水边6的厚度为4毫米。
所述尾翼4的上端与固定导叶3的出水边上端之间的间距为固定导叶3的出水边高度的3％，尾翼4的下端与固定导叶3的出水边下端之间的间距为固定导叶3的出水边高度的3％。
本实施例为又一较佳实施方式。
实施例5
参见图1和图3，反击式水轮机的座环，包括上环板1、下环板2和固定于上环板1和下环板2之间的多个固定导叶3，所述固定导叶3上设置有尾翼4，尾翼4固定在固定导叶3的出水边中部上，所述尾翼4呈柱状，尾翼4的横截面呈梯形，由尾翼底边5、尾翼出水边6、第一尾翼侧边7和第二尾翼侧边8围成，所述尾翼底边5长度与固定导叶3的出水边长度相等，尾翼底边5与固定导叶3的出水边固定连接，所述尾翼底边5与尾 翼出水边6平行，且尾翼底边5长度大于尾翼出水边6长度。
所述尾翼底边5的一侧开有呈45度的第一焊接坡口9，另一侧开有呈45度的第二焊接坡口10，第一焊接坡口9和第二焊接坡口10对称布置，尾翼底边5与固定导叶3的出水边通过焊接连接。
所述尾翼出水边6的厚度为5毫米。
所述尾翼4的上端与固定导叶3的出水边上端之间的间距为固定导叶3的出水边高度的5％，尾翼4的下端与固定导叶3的出水边下端之间的间距为固定导叶3的出水边高度的5％。
多个固定导叶3均为相同几何尺寸，任意相邻两个固定导叶3的间距相同。
本实施例为又一较佳实施方式。
实施例6
参见图1、图3和图4，反击式水轮机的座环，包括上环板1、下环板2和固定于上环板1和下环板2之间的多个固定导叶3，所述固定导叶3上设置有尾翼4，尾翼4固定在固定导叶3的出水边中部上，所述尾翼4呈柱状，尾翼4的横截面呈梯形，由尾翼底边5、尾翼出水边6、第一尾翼侧边7和第二尾翼侧边8围成，所述尾翼底边5长度与固定导叶3的出水边长度相等，尾翼底边5与固定导叶3的出水边固定连接，所述尾翼底边5与尾翼出水边6平行，且尾翼底边5长度大于尾翼出水边6长度。
所述尾翼底边5的一侧开有呈45度的第一焊接坡口9，另一侧开有呈45度的第二焊接坡口10，第一焊接坡口9和第二焊接坡口10对称布置，尾翼底边5与固定导叶3的出水边通过焊接连接。
所述尾翼出水边6的厚度为5毫米。
所述尾翼4的上端与固定导叶3的出水边上端之间的间距为固定导叶3的出水边高度的5％，尾翼4的下端与固定导叶3的出水边下端之间的间距为固定导叶3的出水边高度的5％。
多个固定导叶3均为相同几何尺寸，任意相邻两个固定导叶3的间距相同。
固定导叶3的出水边与尾翼4的上端通过焊接连接形成第一焊缝11，固定导叶3的出水边与尾翼4的下端通过焊接连接形成第二焊缝12。
固定导叶3尾部背面型线为直线，第一尾翼侧边7为固定导叶3尾部背面型线的延长线；固定导叶3尾部正面型线为直线，第二尾翼侧边8为固定导叶3尾部正面型线的延长线。
本实施例为最佳实施方式之一。
实施例7
参见图1、图3和图4，反击式水轮机的座环，包括上环板1、下环板 2和固定于上环板1和下环板2之间的多个固定导叶3，所述固定导叶3上设置有尾翼4，尾翼4固定在固定导叶3的出水边中部上，所述尾翼4呈柱状，尾翼4的横截面呈梯形，由尾翼底边5、尾翼出水边6、第一尾翼侧边7和第二尾翼侧边8围成，所述尾翼底边5长度与固定导叶3的出水边长度相等，尾翼底边5与固定导叶3的出水边固定连接，所述尾翼底边5与尾翼出水边6平行，且尾翼底边5长度大于尾翼出水边6长度。
所述尾翼底边5的一侧开有呈45度的第一焊接坡口9，另一侧开有呈45度的第二焊接坡口10，第一焊接坡口9和第二焊接坡口10对称布置，尾翼底边5与固定导叶3的出水边通过焊接连接。
所述尾翼出水边6的厚度为5毫米。
所述尾翼4的上端与固定导叶3的出水边上端之间的间距为固定导叶3的出水边高度的5％，尾翼4的下端与固定导叶3的出水边下端之间的间距为固定导叶3的出水边高度的5％。
多个固定导叶3均为相同几何尺寸，任意相邻两个固定导叶3的间距相同。
固定导叶3的出水边与尾翼4的上端通过焊接连接形成第一焊缝11，固定导叶3的出水边与尾翼4的下端通过焊接连接形成第二焊缝12。
固定导叶3尾部背面型线为曲线，第一尾翼侧边7为固定导叶3尾部背面型线的切线，切点为固定导叶3尾部背面型线与尾翼底边5的交点；固定导叶3尾部正面型线为曲线，第二尾翼侧边8为固定导叶3尾部正面型线的切线，切点为固定导叶3尾部正面型线与尾翼底边5的交点。
所述尾翼4的材质与固定导叶3的材质相同。
本实施例为最佳实施方式之二。
本发明不限于上述实施例。

Claims (9)

  1. 反击式水轮机的座环，包括上环板(1)、下环板(2)和固定于上环板(1)和下环板(2)之间的多个固定导叶(3)，其特征在于：所述固定导叶(3)上设置有尾翼(4)，尾翼(4)固定在固定导叶(3)的出水边中部上，所述尾翼(4)呈柱状，尾翼(4)的横截面呈梯形，由尾翼底边(5)、尾翼出水边(6)、第一尾翼侧边(7)和第二尾翼侧边(8)围成，所述尾翼底边(5)长度与固定导叶(3)的出水边长度相等，尾翼底边(5)与固定导叶(3)的出水边固定连接，所述尾翼底边(5)与尾翼出水边(6)平行，且尾翼底边(5)长度大于尾翼出水边(6)长度。
  2. 根据权利要求1所述的反击式水轮机的座环，其特征在于：所述尾翼底边(5)的一侧开有呈45度的第一焊接坡口(9)，另一侧开有呈45度的第二焊接坡口(10)，第一焊接坡口(9)和第二焊接坡口(10)对称布置，尾翼底边(5)与固定导叶(3)的出水边通过焊接连接。
  3. 根据权利要求1所述的反击式水轮机的座环，其特征在于：所述尾翼出水边(6)的厚度为3-5毫米。
  4. 根据权利要求1所述的反击式水轮机的座环，其特征在于：所述尾翼(4)的上端与固定导叶(3)的出水边上端之间的间距为固定导叶(3)的出水边高度的1-5％，尾翼(4)的下端与固定导叶(3)的出水边下端之间的间距为固定导叶(3)的出水边高度的1-5％。
  5. 根据权利要求1所述的反击式水轮机的座环，其特征在于：多个固定导叶(3)均为相同几何尺寸，任意相邻两个固定导叶(3)的间距相同。
  6. 根据权利要求1所述的反击式水轮机的座环，其特征在于：固定导叶(3)的出水边与尾翼(4)的上端通过焊接连接形成第一焊缝(11)，固定导叶(3)的出水边与尾翼(4)的下端通过焊接连接形成第二焊缝(12)。
  7. 根据权利要求6所述的反击式水轮机的座环，其特征在于：固定导叶(3)尾部背面型线为直线，第一尾翼侧边(7)为固定导叶(3)尾部背面型线的延长线；固定导叶(3)尾部正面型线为直线，第二尾翼侧边(8)为固定导叶(3)尾部正面型线的延长线。
  8. 根据权利要求7所述的反击式水轮机的座环，其特征在于：固定导叶(3)尾部背面型线为曲线，第一尾翼侧边(7)为固定导叶(3)尾部背面型线的切线，切点为固定导叶(3)尾部背面型线与尾翼底边(5)的交点；固定导叶(3)尾部正面型线为曲线，第二尾翼侧边(8)为固定导叶(3)尾部正面型线的切线，切点为固定导叶(3)尾部正面型线与尾翼底边(5)的交点。
  9. 根据权利要求1所述的反击式水轮机的座环，其特征在于：所述尾翼(4)的材质与固定导叶(3)的材质相同。
PCT/CN2019/083060 2018-04-24 2019-04-17 反击式水轮机的座环 Ceased WO2019206004A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810374133.3 2018-04-24
CN201810374133.3A CN108386304A (zh) 2018-04-24 2018-04-24 反击式水轮机的座环

Publications (1)

Publication Number Publication Date
WO2019206004A1 true WO2019206004A1 (zh) 2019-10-31

Family

ID=63064618

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/083060 Ceased WO2019206004A1 (zh) 2018-04-24 2019-04-17 反击式水轮机的座环

Country Status (2)

Country Link
CN (1) CN108386304A (zh)
WO (1) WO2019206004A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114526392A (zh) * 2022-02-10 2022-05-24 国网福建省电力有限公司电力科学研究院 一种尾水管的混合消除涡带装置
CN117889029A (zh) * 2024-03-15 2024-04-16 东方电气集团东方电机有限公司 水轮机顶盖、水轮机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108626055A (zh) * 2018-04-24 2018-10-09 东方电气集团东方电机有限公司 防止反击式水轮机固定导叶共振产生裂纹的方法
CN108386304A (zh) * 2018-04-24 2018-08-10 东方电气集团东方电机有限公司 反击式水轮机的座环
CN113375901B (zh) * 2021-05-14 2023-05-16 东方电气集团科学技术研究院有限公司 一种管束结构流致振动的涡街频率与管间流速测试方法
CN115559846A (zh) * 2022-07-25 2023-01-03 国网新源集团有限公司新安江水力发电厂 一种带有弧线形出水边翼型的混流式水轮机固定导叶

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101264796A (zh) * 2007-03-16 2008-09-17 欧洲直升机德国有限责任公司 以旋翼桨叶为例的翼型变形
EP2282010A1 (de) * 2009-06-23 2011-02-09 Siemens Aktiengesellschaft Laufschaufel für eine axial durchströmbare Turbomaschine
CN101992852A (zh) * 2009-08-17 2011-03-30 贝克船舶系统有限公司 水上交通工具的水翼
CN202140222U (zh) * 2011-07-04 2012-02-08 哈尔滨电机厂有限责任公司 预防水轮机固定导叶卡门涡振动的出水边截面形状
CN108386304A (zh) * 2018-04-24 2018-08-10 东方电气集团东方电机有限公司 反击式水轮机的座环
CN108626055A (zh) * 2018-04-24 2018-10-09 东方电气集团东方电机有限公司 防止反击式水轮机固定导叶共振产生裂纹的方法
CN208310944U (zh) * 2018-04-24 2019-01-01 东方电气集团东方电机有限公司 反击式水轮机固定导叶尾翼
CN208310945U (zh) * 2018-04-24 2019-01-01 东方电气集团东方电机有限公司 反击式水轮机的座环

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB734704A (en) * 1952-12-19 1955-08-03 English Electric Co Ltd Improvements in and relating to hydraulic turbines or pumps
CN1195155C (zh) * 2002-10-18 2005-03-30 中国船舶工业第七○八研究所 一种叶轮装置
CA2640643C (en) * 2004-09-17 2011-05-31 Clean Current Power Systems Incorporated Flow enhancement for underwater turbine generator
US8403622B2 (en) * 2005-02-09 2013-03-26 Prime Energy Corporation Radial-flow, horizontal-axis fluid turbine
CN101053929A (zh) * 2007-05-31 2007-10-17 四川东风电机厂有限公司 灯泡贯流式机组机座的焊接及变形控制工艺
CN101560937B (zh) * 2009-05-27 2010-11-10 南京星飞冷却设备有限公司 应用于水动节能冷却塔的直联低速小型混流式水轮机座环
CN102269104A (zh) * 2011-07-04 2011-12-07 哈尔滨电机厂有限责任公司 预防水轮机固定导叶卡门涡振动的出水边截面形状
EP2591994B1 (de) * 2011-11-11 2014-06-18 Becker Marine Systems GmbH & Co. KG Vorrichtung zur Verringerung des Antriebsleistungsbedarfs eines Wasserfahrzeuges
CN104564523A (zh) * 2013-10-12 2015-04-29 曾莉芳 导流、反冲和伸缩功能风叶片的风力发电机
EP2933434A1 (en) * 2014-04-16 2015-10-21 Siemens Aktiengesellschaft Controlling cooling flow in a cooled turbine vane or blade using an impingement tube
CN204877767U (zh) * 2015-06-15 2015-12-16 辽宁禾润锦节能设备有限公司 水轮机固定导叶连接结构

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101264796A (zh) * 2007-03-16 2008-09-17 欧洲直升机德国有限责任公司 以旋翼桨叶为例的翼型变形
EP2282010A1 (de) * 2009-06-23 2011-02-09 Siemens Aktiengesellschaft Laufschaufel für eine axial durchströmbare Turbomaschine
CN101992852A (zh) * 2009-08-17 2011-03-30 贝克船舶系统有限公司 水上交通工具的水翼
CN202140222U (zh) * 2011-07-04 2012-02-08 哈尔滨电机厂有限责任公司 预防水轮机固定导叶卡门涡振动的出水边截面形状
CN108386304A (zh) * 2018-04-24 2018-08-10 东方电气集团东方电机有限公司 反击式水轮机的座环
CN108626055A (zh) * 2018-04-24 2018-10-09 东方电气集团东方电机有限公司 防止反击式水轮机固定导叶共振产生裂纹的方法
CN208310944U (zh) * 2018-04-24 2019-01-01 东方电气集团东方电机有限公司 反击式水轮机固定导叶尾翼
CN208310945U (zh) * 2018-04-24 2019-01-01 东方电气集团东方电机有限公司 反击式水轮机的座环

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114526392A (zh) * 2022-02-10 2022-05-24 国网福建省电力有限公司电力科学研究院 一种尾水管的混合消除涡带装置
CN114526392B (zh) * 2022-02-10 2023-09-22 国网福建省电力有限公司电力科学研究院 一种尾水管的混合消除涡带装置
CN117889029A (zh) * 2024-03-15 2024-04-16 东方电气集团东方电机有限公司 水轮机顶盖、水轮机
CN117889029B (zh) * 2024-03-15 2024-05-24 东方电气集团东方电机有限公司 水轮机顶盖、水轮机

Also Published As

Publication number Publication date
CN108386304A (zh) 2018-08-10

Similar Documents

Publication Publication Date Title
WO2019206004A1 (zh) 反击式水轮机的座环
US8469659B2 (en) Turbine blade cascade endwall
CN103982361B (zh) 一种用于水轮机的尾水管
WO2019206009A1 (zh) 防止反击式水轮机固定导叶共振产生裂纹的方法
CN202510918U (zh) 一种w字型海洋隔水管涡激振动抑制装置
CN102720622B (zh) 一种水轮机尾水管涡流发生器
CN112360660B (zh) 一种长短叶片型可逆式水泵水轮机
CN103912435A (zh) 一种小水电轴流式水轮机转轮
CN201133321Y (zh) 小上冠出口混流式水轮机转轮
CN102434223B (zh) 大流量空冷汽轮机低压级组末级叶片
CN109083806B (zh) 一种波浪翼型叶片及风力机
WO2019206008A1 (zh) 混流式水轮机转轮叶片出口边修型方法
CN101892654B (zh) 锥形漩流竖井
CN104929037A (zh) 一种桥梁墩柱导流装置
CN202500823U (zh) 复合型喇叭管
CN218030421U (zh) 一种带有锯齿形出水边翼型的混流式水轮机固定导叶
CN209586585U (zh) 一种带有扰流结构的风力发电机叶片
CN105863930B (zh) 一种小型一体式水轮发电机组
CN202194767U (zh) 轴流式水轮机新型转轮
CN113513368B (zh) 一种带有子母动叶片结构的可直接倒车涡轮
CN208310945U (zh) 反击式水轮机的座环
CN106321366A (zh) 分形结构的垂直轴风力机塔架
CN212360032U (zh) 一种能够抑制卡门涡街的风机塔筒结构
CN208310944U (zh) 反击式水轮机固定导叶尾翼
CN116378913B (zh) 一种改变叶片气热除冰局部流场的强化换热结构

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19792729

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19792729

Country of ref document: EP

Kind code of ref document: A1