US3361070A - Flow adjusting device for a pump turbine - Google Patents

Flow adjusting device for a pump turbine Download PDF

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Publication number
US3361070A
US3361070A US505695A US50569565A US3361070A US 3361070 A US3361070 A US 3361070A US 505695 A US505695 A US 505695A US 50569565 A US50569565 A US 50569565A US 3361070 A US3361070 A US 3361070A
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Prior art keywords
turbine
water
pump
pump turbine
adjusting device
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US505695A
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Fukasu Shunichi
Oyamada Sojiro
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Hitachi Ltd
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Hitachi Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B15/00—Controlling
    • F03B15/005—Starting, also of pump-turbines
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/91—Reversible between pump and motor use

Definitions

  • the present disclosure relates to a reversible water pump-turbine having a relatively large needle valve between its penstock and rotatable blades, with the needle valve being actuated by a double acting fluid pistoncylinder.
  • a line is provided to bypass the needle valve and has therein a secondary or bypass valve.
  • movable guide vanes have been conventionally mostly employed as a means for adjusting flow in water turbines or pumps which serve as Water turbines too. In such cases movable guide vanes have been disposed on the same circumference as the runner and adjacent the same. It is also well known that the movable guide vanes are eflective as a means for cutting olf water flow though they are chiefly intended for means to adjust water flow.
  • Another means for cutting ofl water flow is also well known, that is to say a gate valve connected to a penstock.
  • the above mentioned movable guide vanes serve to adjust flow in accordance with the detected frequency fluctuation of the power transmission system so that the output of the water turbine generator may be adjusted properly, while when it is operated a a pump for raising water, discharge is adjusted by means of the movable guide vanes or the gate valve.
  • the conventional pump turbine as stated above requires a group of movable guide vanes as a means for adjusting flow, which makes the construction much complicated.
  • the movable guide vanes or other means for cutting off water flow, for instance butter-fly valves are easily caused to have vibration. This takes place especially in cases of high lifts.
  • a main valve means for instance a large-sized needle valve means is employed in a pump turbine for adjusting output in Water turbine operation and discharge in pumping operation.
  • the device of the present invention can not only relieve effectively difliculties with high head drops and high lifts but also simplifies the construction of the pump turbine.
  • the figure illustrates a sectional view of the invention.
  • Reference numeral 1 indicates a runner in a pump turbine, and 2 is a casing.
  • the valve body 3 of a needle valve means is disposed between a pressure steel pipe 4 and the casing 2.
  • a needle valve 5 which is connected to a valve rod 6 is driven by a servo-motor 7.
  • the servo-motor 7 works in accordance with instructions from such a means as a governor (not shown) which determines output of the water turbine generator or discharge of the pump in accordance with the purpose of operation i.e. water turbine operation or pumping operation.
  • a bypass valve indicated by numeral 14 is operated in water turbine operation, or more precisely in the starting period and parallel operation of the water turbine.
  • the servo-motor 7 operates to drive the needle-valve 5 in accordance with the frequency fluctuation and predetermined programming of the power transmission system so that flow from the pressure steel pipe 4- into the casing 2 may be adjusted.
  • the predetermined programming above means the programming of power supply as set considering peak etc.
  • the needle valve 5 works to adjust discharge to be introduced into the upper water reservoir through the casing 22, the valve body 3 and the pressure steel pipe 4.
  • a reversible water pump-turbine comprising: blade means operable as a reversible pump and turbine, having a casing; a penstock; main valve means mounted between said penstock and said casing for adjusting fluid flow; a bypass line directly connecting said penstock with said casing to bypass said main valve means; secondary valve means in said bypass line being operative to balance water pressure between said penstock and said casing when said reversible pump-turbine blade means is started and to eifect minute fluid flow control until said pump-turbine blade means is brought to synchronized operation.

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

Description

1968 SHUNICHI FUKASU ETAL v 3,361,070
FLOW ADJUSTING DEVICE FOR A PUMP TURBINE Filed on. 29, 1965 INVENTORS SHuM/c/l/ Fakfisa Sumo omnnon ATTORNEY United States Patent Ofiice 3,3513% Patented Jan. 2, 1968 3,361,070 FLOW ADJUSTING DEVlCE FOR A PUMP TURBINE Shunichi Fukasu, Hitachi-sill, and Sojiro Oyamada, Sapporo-shi, Japan, assignors to Hitachi, Ltd, Tokyo, Japan, a corporation of Japan Filed Oct. 29, 1965, Ser. No. 5ll5,65 Claims priority, application .lapan, Dec. 24, 1%4, 39/72,521 3 Claims. (Cl. 103-97) ABSTRACT OF THE DISCLQSURE The present disclosure relates to a reversible water pump-turbine having a relatively large needle valve between its penstock and rotatable blades, with the needle valve being actuated by a double acting fluid pistoncylinder. A line is provided to bypass the needle valve and has therein a secondary or bypass valve.
It has been known that movable guide vanes have been conventionally mostly employed as a means for adjusting flow in water turbines or pumps which serve as Water turbines too. In such cases movable guide vanes have been disposed on the same circumference as the runner and adjacent the same. It is also well known that the movable guide vanes are eflective as a means for cutting olf water flow though they are chiefly intended for means to adjust water flow.
Another means for cutting ofl water flow is also well known, that is to say a gate valve connected to a penstock.
When a pump turbine is operated as a water turbine, the above mentioned movable guide vanes serve to adjust flow in accordance with the detected frequency fluctuation of the power transmission system so that the output of the water turbine generator may be adjusted properly, while when it is operated a a pump for raising water, discharge is adjusted by means of the movable guide vanes or the gate valve.
The conventional pump turbine as stated above, however, requires a group of movable guide vanes as a means for adjusting flow, which makes the construction much complicated. In addition, in pumping operation the movable guide vanes or other means for cutting off water flow, for instance butter-fly valves, are easily caused to have vibration. This takes place especially in cases of high lifts.
According to the present invention to avoid the disadvantages described above, a main valve means, for instance a large-sized needle valve means is employed in a pump turbine for adjusting output in Water turbine operation and discharge in pumping operation. The device of the present invention can not only relieve effectively difliculties with high head drops and high lifts but also simplifies the construction of the pump turbine.
Further, employment of a large needle valve means which is offered comparatively small fluid resistance as a main valve means reduces or prevents at all the vibrations.
The figure illustrates a sectional view of the invention.
There are other objects and particularities of the invention which will be explained in detail with reference to the accompanying drawing which is a horizontal sectional view roughly showing a flow adjusting device embodying the present invention. Reference numeral 1 indicates a runner in a pump turbine, and 2 is a casing. The valve body 3 of a needle valve means is disposed between a pressure steel pipe 4 and the casing 2. A needle valve 5 which is connected to a valve rod 6 is driven by a servo-motor 7.
When a working fluid is supplied into an upper chamber defined between the upper wall of the servo cylinder and a piston 11 mounted at the upper end of said rod 6 through a pipe 9 connected to said upper chamber, the piston 11 is moved downwardly to close the valve. When the working fluid is supplied into a lower chamber defined between the lower wall of the servo cylinder and the piston 11 through a pipe 8 connected to said lower chamber, the piston 11 is moved upwardly to open the valve. The servo-motor 7 works in accordance with instructions from such a means as a governor (not shown) which determines output of the water turbine generator or discharge of the pump in accordance with the purpose of operation i.e. water turbine operation or pumping operation. A bypass valve indicated by numeral 14 is operated in water turbine operation, or more precisely in the starting period and parallel operation of the water turbine.
In water turbine operation, the servo-motor 7 operates to drive the needle-valve 5 in accordance with the frequency fluctuation and predetermined programming of the power transmission system so that flow from the pressure steel pipe 4- into the casing 2 may be adjusted. (The predetermined programming above means the programming of power supply as set considering peak etc.)
On the other hand in pumping operation the needle valve 5 works to adjust discharge to be introduced into the upper water reservoir through the casing 22, the valve body 3 and the pressure steel pipe 4.
What is claimed is:
1. A reversible water pump-turbine, comprising: blade means operable as a reversible pump and turbine, having a casing; a penstock; main valve means mounted between said penstock and said casing for adjusting fluid flow; a bypass line directly connecting said penstock with said casing to bypass said main valve means; secondary valve means in said bypass line being operative to balance water pressure between said penstock and said casing when said reversible pump-turbine blade means is started and to eifect minute fluid flow control until said pump-turbine blade means is brought to synchronized operation.
2. A reversible pump turbine as claimed in claim 1, wherein said main valve means is a relatively large needle valve means for controlling the output or the quantity of water pumped and said secondary valve means is a bypass valve means for controlling the speed of said blade means.
3. A reversible pump turbine as claimed in claim 2, wherein said needle valve means includes a double acting fluid piston-cylinder actuator.
References Cited UNITED STATES PATENTS 1,220,403 3/1917 Doble 103-97 2,949,540 8/1960 Clayton 253-31 FOREIGN PATENTS 1,095,672 12/1960 Germany.
518,017 3/1955 Italy.
HENRY F. RADUAZO, Primary Examiner.
US505695A 1964-12-24 1965-10-29 Flow adjusting device for a pump turbine Expired - Lifetime US3361070A (en)

Applications Claiming Priority (1)

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JP7252164 1964-12-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060042246A1 (en) * 2004-08-31 2006-03-02 Government of the United States of America, as represented by the Administrator of the U.S. Efficient bypass valve for multi-stage turbocharging system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1220403A (en) * 1913-06-02 1917-03-27 Pelton Water Wheel Co Centrifugal pump.
US2949540A (en) * 1957-06-27 1960-08-16 Mark M Clayton Combination hydraulic turbine and electric generator
DE1095672B (en) * 1959-03-11 1960-12-22 Sulzer Ag Closing process for the shut-off device of the pressure line of a centrifugal pump system, especially storage pump system and system for carrying out the process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1220403A (en) * 1913-06-02 1917-03-27 Pelton Water Wheel Co Centrifugal pump.
US2949540A (en) * 1957-06-27 1960-08-16 Mark M Clayton Combination hydraulic turbine and electric generator
DE1095672B (en) * 1959-03-11 1960-12-22 Sulzer Ag Closing process for the shut-off device of the pressure line of a centrifugal pump system, especially storage pump system and system for carrying out the process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060042246A1 (en) * 2004-08-31 2006-03-02 Government of the United States of America, as represented by the Administrator of the U.S. Efficient bypass valve for multi-stage turbocharging system
US8387385B2 (en) * 2004-08-31 2013-03-05 The United States Of America, As Represented By The Administrator Of The U.S. Environmental Protection Agency Efficient bypass valve for multi-stage turbocharging system

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