GB895485A - Improvements in or relating to control systems for centrifugal pumps - Google Patents

Improvements in or relating to control systems for centrifugal pumps

Info

Publication number
GB895485A
GB895485A GB3123457A GB3123457A GB895485A GB 895485 A GB895485 A GB 895485A GB 3123457 A GB3123457 A GB 3123457A GB 3123457 A GB3123457 A GB 3123457A GB 895485 A GB895485 A GB 895485A
Authority
GB
United Kingdom
Prior art keywords
piston
switch
pump
motor
centrifugal
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
GB3123457A
Inventor
Thomas Mcalpine
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.)
Weir Group PLC
Original Assignee
G&J Weir 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 G&J Weir Ltd filed Critical G&J Weir Ltd
Priority to GB3123457A priority Critical patent/GB895485A/en
Publication of GB895485A publication Critical patent/GB895485A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00—Feed-water supply not provided for in other main groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0281—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00—Feed-water supply not provided for in other main groups
    • F22D11/02—Arrangements of feed-water pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

895,485. Control of motors; centrifugal switches. WEIR Ltd., G. & J. Oct. 6, 1958 [Oct. 5, 1957] No. 31234/57. Classes 38 (3) and 38 (5). [Also in Group XXVI] A centrifugal boiler feed pump 1 is driven by an electric motor (not shown). If, when a predetermined speed is reached after starting, the pump is vapour -bound and consequently fails to develop sufficient discharge pressure to pump water, a centrifugal governor 2, acting through one end of a lever 4, moves a link 10 towards the right to open a switch 6, thereby stopping the motor. To re-start the motor, a trip mechanism (not shown) must be re-set by hand. If, however, the pressure developed at a point 7 (not necessarily the discharge branch) on the pump has reached its normal value, it causes sufficient movement of a piston 8 connected to the other end of the lever 4 to keep the switch 6 closed. The switch 6 may be connected to the link 10 by a spring, as shown, so that it is not affected by the piston 8 moving too far to the left. In a modification, the centrifugal governor is replaced by an oil pump driven by the motor and applying a pressure which is a measure of the shaft speed to a piston in opposition to the piston 8, the two pistons being connected to opposite ends of a common piston-rod which is connected directly to the switch.
GB3123457A 1957-10-05 1957-10-05 Improvements in or relating to control systems for centrifugal pumps Expired GB895485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3123457A GB895485A (en) 1957-10-05 1957-10-05 Improvements in or relating to control systems for centrifugal pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3123457A GB895485A (en) 1957-10-05 1957-10-05 Improvements in or relating to control systems for centrifugal pumps

Publications (1)

Publication Number Publication Date
GB895485A true GB895485A (en) 1962-05-02

Family

ID=10320055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3123457A Expired GB895485A (en) 1957-10-05 1957-10-05 Improvements in or relating to control systems for centrifugal pumps

Country Status (1)

Country Link
GB (1) GB895485A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253245A (en) * 1991-02-28 1992-09-02 Hamworthy Heating Ltd Control means for a pump
EP2055965A1 (en) * 2007-06-07 2009-05-06 Daikin Industries, Ltd. Fluid pressure unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253245A (en) * 1991-02-28 1992-09-02 Hamworthy Heating Ltd Control means for a pump
GB2253245B (en) * 1991-02-28 1994-10-19 Hamworthy Heating Ltd Flow related control means for a pump
EP2055965A1 (en) * 2007-06-07 2009-05-06 Daikin Industries, Ltd. Fluid pressure unit
EP2055965A4 (en) * 2007-06-07 2010-05-26 Daikin Ind Ltd Fluid pressure unit
US8302394B2 (en) 2007-06-07 2012-11-06 Daikin Industries, Ltd. Fluid pressure unit

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