GB1136031A - Rotary hydraulic machines, such as pumps, turbines and pump-turbines - Google Patents

Rotary hydraulic machines, such as pumps, turbines and pump-turbines

Info

Publication number
GB1136031A
GB1136031A GB5448/66A GB544866A GB1136031A GB 1136031 A GB1136031 A GB 1136031A GB 5448/66 A GB5448/66 A GB 5448/66A GB 544866 A GB544866 A GB 544866A GB 1136031 A GB1136031 A GB 1136031A
Authority
GB
United Kingdom
Prior art keywords
space
annular
air
water
flange
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.)
Expired
Application number
GB5448/66A
Inventor
Jacques Desbaillets
Paul Koeller
Johann H Lang
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.)
Dominion Engineering Works Ltd
Original Assignee
Dominion Engineering Works Ltd
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 Dominion Engineering Works Ltd filed Critical Dominion Engineering Works Ltd
Priority to GB5448/66A priority Critical patent/GB1136031A/en
Publication of GB1136031A publication Critical patent/GB1136031A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/006Sealing arrangements
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Landscapes

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

Abstract

1,136,031. Centrifugal pumps; hydraulic turbines. DOMINION ENG. WORKS Ltd. Feb. 8, 1966, No. 5448/66. Headings F1C and F1T. In a hydraulic turbine, pump or pump-turbine in which fluid friction on the runner is reduced by introducing air into an annular space 22 adjoining the band shroud 17, the space 22 is bounded by an annular baffle 20. When injection of air through a pipe 28 commences, centrifugal separation takes place between the water and the air in the space 22, so that the water is expelled radially outwards from the space. In addition, an air-water interface 48 is established beyond the radially inner end of the space 22, between a radially extending annular surface 46 of an annular flange 31 projecting radially from the band shroud 17 and an adjacent parallel surface 45 on the baffle 20, the flange 31 acting as a centrifugal separation for this purpose. After the water has been expelled from the space 22, some air leaks from the space at its radially outer end and collects on the other side of the baffle 20 in an annular pocket bounded by an annular flange 42, as shown. The resultant depression of the water level in an annular space 23 reduces the water pressure between the surfaces 45, 46, thereby allowing the air-water interface 48 to move to the outer periphery of the centrifugal separator flange 31, as shown. In the stable condition now attained, water leaking from the runner periphery and passing, via space 23 and an annular seal space 30, to the draft tube 15 undergoes an increase in pressure head in an annular diffuser passage 41, this increase combined with the pressure head due to the height of water in the space 23 above the centrifugal separator flange 31 balancing the pumping action of the latter, and excess air leaks from the space 22 by breaking through the air-water interface 48 and passing via the seal space 30 to the draft tube 15. An annular wall 34 prevents air in space 23 from escaping through the seal space 30. Holes 37 permit interchange of air between the spaces 23 and 22 to allow the water level in the space 23 to change in response to change in operating conditions. The diffuser passage 41 may be omitted or replaced by substantially parallel annular passages containing radial vanes which are tapered in the direction of flow to provide diffusion. A similar arrangement is provided adjacent the crown shroud.
GB5448/66A 1966-02-08 1966-02-08 Rotary hydraulic machines, such as pumps, turbines and pump-turbines Expired GB1136031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5448/66A GB1136031A (en) 1966-02-08 1966-02-08 Rotary hydraulic machines, such as pumps, turbines and pump-turbines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5448/66A GB1136031A (en) 1966-02-08 1966-02-08 Rotary hydraulic machines, such as pumps, turbines and pump-turbines

Publications (1)

Publication Number Publication Date
GB1136031A true GB1136031A (en) 1968-12-11

Family

ID=9796381

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5448/66A Expired GB1136031A (en) 1966-02-08 1966-02-08 Rotary hydraulic machines, such as pumps, turbines and pump-turbines

Country Status (1)

Country Link
GB (1) GB1136031A (en)

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