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
  • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
  • F03B3/02—Machines or engines of reaction type; Parts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
• • 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
  • F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
• • 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
  • F03B3/12—Blades; Blade-carrying rotors
  • F03B3/125—Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines
• • 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
  • F03B3/183—Adjustable vanes, e.g. wicket gates
• • 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
  • F03B3/186—Spiral or volute casings
• • 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 a Francis turbine or pump or pump turbine, in particular the distributor of such a turbine, which is used to supply the
• Francis turbines are adapted to different operating conditions by adjusting the vanes. Nevertheless, especially under
• baffles may be formed as fins, which are oriented in the axial direction. This form leads to a suppression of the
• variable baffles have been developed which
• baffles can be pivoted about an axis parallel to the machine axis according to the operating conditions.
• Further types of baffles are oriented parallel to the wall surfaces of the suction tube and thus prevent by the stabilization of the flow between baffle and suction tube wall a detachment of flow areas.
• this construction also reduces the energy yield of the turbines.
• static or variable designs increase the expense of turbine manufacture and maintenance and are therefore a cost-relevant factor.
• other measures are known, but they are either expensive or worsen the efficiency of the machine. See DE 102 13 774 AI.
• a hitherto unrecognized problem lies in the following: All traverses of the truss ring so far have the same geometry. However, the volute is not ideal rotationally symmetric. Especially with pump turbines with different flow opening this asymmetry is thereby reinforced.
• the invention has for its object to design a hydraulic machine of the type mentioned above such that the asymmetry of the flow decreases and thus the flow in the region of the truss ring is uniform.
• the core idea of the invention is to provide an outer vane ring in addition to the truss ring. The flow thus emerges from the
• a portion of the truss ring with larger trusses extends over a portion of the circumference of the impeller, starting at the beginning of the spiral, and a portion of the truss ring with smaller trusses extends beyond the wider circumference of the impeller to the end of the spiral.
• the size of the trusses thus decreases until the end of the spiral. The decrease can be continuous.
• An advantageous embodiment is to arrange the vanes of the outer vane ring (thus of the first through-flow) to the end of the spiral, but not at the beginning of the spiral.
• Another idea is to use the traverses of the truss ring in
• FIG. 1 shows the essential components of a conventional Francis turbine in a meridian section.
• Figure 2 shows an axial section of a Francis turbine according to the invention.
• FIG. 3 shows the Francis turbine according to FIG. 2 in an axis-perpendicular
• the Francis turbine shown in Figure 1 has an impeller 1. This comprises a plurality of blades 1.1.
• the impeller 1 passes around a rotation axis 2.
• the impeller 1 is enclosed by a spiral housing 3.
• the spiral casing 3 is, for example, of circular cross section. It has an encircling
• the opening slot is limited by circumferential edges 3.1, 3.2.
• a truss ring 4 connects at the circumferential, formed from the edges 3.1, 3.2 slot. This has two traverse ring decks 4.1 and 4.2. A Traverse 4.3 serves as a tie rod.
• the areas of the peripheral edges 3.1, 3.2 of the spiral housing are welded to the cross-ribbed decks 4.1, 4.2. Between traverse ring and impeller a nozzle with vane 5 is provided.
• a suction pipe 6 is connected, which has a plurality of sections.
• the spiral housing is of circular cross-section.
• the areas of the circumferential edges are at the connection points to the two
• the Francis turbine according to the invention shown in FIGS. 2 and 3 in turn has an impeller which is not shown here, but it is the latter
• Rotary axis 2 The impeller has a spiral housing 3. You recognize one
• Traverse Ring 4 This includes a number of "big” Traverses 4.4 and “small” Traverses 4.5. See Figure 3.
• the cross-membered ring part starts with the large traverses 4.4 at the beginning of the spiral and extends approximately to half of the circumference of the impeller. Then follow the part of the truss ring with the small spirals 4.5. This part of the truss ring extends to the end of the spiral.
• a conventional inner vane ring with vanes 5.1 This vane ring extends around the entire circumference of the impeller, not shown.
• This second outer vane ring extends only over part of the Circumference. It starts where the traverse ring starts with the small traverses 4.5.
• Vanes 5.2 Vanes 5.2.

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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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=46601749

Family Applications (1)

Country Status (9)

Families Citing this family (3)

Citations (1)

Family Cites Families (11)

• 2011
  • 2011-09-07 DE DE102011112521A patent/DE102011112521A1/de not_active Ceased
• 2012
  • 2012-07-31 CA CA2844566A patent/CA2844566A1/en active Pending
  • 2012-07-31 WO PCT/EP2012/003236 patent/WO2013034224A2/de active Application Filing
  • 2012-07-31 EP EP12741259.1A patent/EP2753823A2/de not_active Withdrawn
  • 2012-07-31 JP JP2014528877A patent/JP2014525547A/ja active Pending
  • 2012-07-31 BR BR112014003147A patent/BR112014003147A2/pt not_active Application Discontinuation
  • 2012-07-31 CN CN201280038737.1A patent/CN103732909B/zh active Active
• 2014
  • 2014-02-04 CL CL2014000277A patent/CL2014000277A1/es unknown
  • 2014-02-07 US US14/175,297 patent/US20140154057A1/en not_active Abandoned

Patent Citations (1)

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