GB839026A - Improvements in or relating to variable-delivery multi-stage hydraulic pumps - Google Patents

Improvements in or relating to variable-delivery multi-stage hydraulic pumps

Info

Publication number
GB839026A
GB839026A GB2870957A GB2870957A GB839026A GB 839026 A GB839026 A GB 839026A GB 2870957 A GB2870957 A GB 2870957A GB 2870957 A GB2870957 A GB 2870957A GB 839026 A GB839026 A GB 839026A
Authority
GB
United Kingdom
Prior art keywords
valve
swash plate
pump
centrifugal pump
outlet
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
GB2870957A
Inventor
Alan Cameron-Johnson
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.)
Rotol Ltd
Original Assignee
Rotol 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 Rotol Ltd filed Critical Rotol Ltd
Priority to GB2870957A priority Critical patent/GB839026A/en
Priority to DE1958R0017046 priority patent/DE1801539U/en
Publication of GB839026A publication Critical patent/GB839026A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/145—Housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Abstract

839,026. Swash plate pumps. ROTOL Ltd. Sept. 10, 1958 [Sept. 11, 1957], No. 28709/57. Class 102(1). A swash plate pump is fed by a centrifugal pump, the flow from the centrifugal pump outlet to the swash plate pump inlet being controlled by a throttle valve 38 subjected at one end to the load of springs 37 and at the other to the action of a piston 51 subjected to the outlet pressure of the swash plate pump. The piston 51 also functions as a relief valve which at a given pressure connects the swash plate pump outlet 33 via ducts 50, 58 to the swash plate chamber 54 connected via a spring-loaded valve 60 to the supply tank. A throttle passage 46 through the valve 38 ensures a small flow through the valve after it closes. In a modification, the throttle passage is formed as a further port in the valve cylinder and a relief valve across the centrifugal pump is arranged to open when the valve 38 closes. In further modifications, the valve 38 is additionally subjected in one direction to the pressure at the inlet to the centrifugal pump and in the other to the outlet from the centrifugal pump.
GB2870957A 1957-09-11 1957-09-11 Improvements in or relating to variable-delivery multi-stage hydraulic pumps Expired GB839026A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2870957A GB839026A (en) 1957-09-11 1957-09-11 Improvements in or relating to variable-delivery multi-stage hydraulic pumps
DE1958R0017046 DE1801539U (en) 1957-09-11 1958-09-11 HYDRAULIC PUMP UNIT.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2870957A GB839026A (en) 1957-09-11 1957-09-11 Improvements in or relating to variable-delivery multi-stage hydraulic pumps

Publications (1)

Publication Number Publication Date
GB839026A true GB839026A (en) 1960-06-29

Family

ID=10279850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2870957A Expired GB839026A (en) 1957-09-11 1957-09-11 Improvements in or relating to variable-delivery multi-stage hydraulic pumps

Country Status (2)

Country Link
DE (1) DE1801539U (en)
GB (1) GB839026A (en)

Also Published As

Publication number Publication date
DE1801539U (en) 1959-12-03

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