US3597116A - Fluid-powered pump - Google Patents

Fluid-powered pump Download PDF

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Publication number
US3597116A
US3597116A US848148A US3597116DA US3597116A US 3597116 A US3597116 A US 3597116A US 848148 A US848148 A US 848148A US 3597116D A US3597116D A US 3597116DA US 3597116 A US3597116 A US 3597116A
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US
United States
Prior art keywords
slide
fluid
valve
pressure
chamber
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 - Lifetime
Application number
US848148A
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English (en)
Inventor
Ralph B Tilney
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.)
Alco Controls Corp
Original Assignee
Alco Controls Corp
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 Alco Controls Corp filed Critical Alco Controls Corp
Application granted granted Critical
Publication of US3597116A publication Critical patent/US3597116A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04B5/00—Machines or pumps with differential-surface pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • F01L25/02—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
    • F01L25/04—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine
    • F01L25/06—Arrangements with main and auxiliary valves, at least one of them being fluid-driven
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • F04B9/115—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting liquid motors, each acting in one direction
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other

Definitions

  • a fluid-powered pump comprising four-way slide valves with fluid conduits connecting the slide valves in a I closed circuit. Highand low-pressure fluid connections to the fluid conduits to cause the slide valves to actuate one another in series in a continuously repeating cycle within the closed circuit.
  • the slide valves may be used to pump other fluids from low-pressure supply areas to high-pressure use areas, such as to pump liquid to the boiler in an absorption-type refrigeration system.
  • a closed circuit of four-way valves is provided.
  • Each four-way valve has a sliding spool formed with lands on a stem.
  • Fluid chambers are defined by grooves between adjacent lands within the confines of the housing.
  • At the ends of the spool there are pumping chambers through which another fluid may be pumped as the spool reciprocates.
  • a separate piston is reciprocative within each pumping chamber. One end of each piston contacts the spool and the other end of the piston is exposed to a port.
  • Fluid conduits connected through the housing wall are alternately exposed to different ones of the fluid chambers that are defined by the grooves, depending upon the position of the spool.
  • the chambers in the spool ofa first valve are connected by these conduits to the ported ends of the pistons of a second valve; the chambers of that second valve are connected by similar conduits to the ported ends of the pistons ofa third valve, and so forth.
  • the chambers of the last valve are connected to the ported ends of the pistons of the first valve to complete and close the cycle.
  • the chambers defined by the grooves are individually connected to sources of high and low-pressure fluids.
  • the spools By alternately porting these conduits between the chambers as the spools reciprocate and by maintaining the different chambers in constant communication with the high and low-pressure fluid sources, the spools will reciprocate in continuous succession.
  • the first spool moves to one end, such as the left end of its housing
  • the spool of the second valve moves to the right
  • the spool of the third valve moves to the left.
  • the spool of the third valve moves to the left, it moves the spool of the first valve to the right thereby changing the porting of fluid to move the spool of the second valve to the left and thereafter cause movement of the third valve to the right.
  • reciprocation of the spools continues so long as the different pressure fluids are supplied to the fluid chambers.
  • FIG. 1 is a schematic diagram of the fluid-powered pump.
  • FIG. 2 is a fragmentary schematic diagram of one end of a modified form of valve that may be incorporated in the pump.
  • This fluid-powered pump comprises a plurality of fourway valves. In this description and in the drawing, three such valves 11, 12, and 13 are described and shown, but the fluidpowered pump will operate with two or more valves.
  • the valves 11, 12, and 13 are of identical construction.
  • Each valves 11, 12, and 13 has a valve body 15 that provides a slide chamber 16 and left and right end piston chambers 17 and 18.
  • the cross-sectional area of the slide chamber 16 is greater than that of the piston chambers 17 and 18, although these relative dimensions my be varied depending upon the desired relationship between pumping rate and pumping pressure, as will be described.
  • a spool or slide 19 is reciprocative within the slide chamber 16,
  • the slide 19 has a stem 20 and four lands 21, 22, 23, and 24.
  • O-rings (not shown) or other suitable seals are provided between the lands 21, 22, 23, and 24 and the inner wall of the slide chamber 16 so that substantially no leakage occurs past any ofthese lands.
  • the volume within the housing 15 to the left of the land 21 constitutes a left end pumping chamber 26.
  • the volume within the housing 15 to the right of the land 24 constitutes a right end pumping chamber 27.
  • the volume within the housing 15 between the lands 21 and 22 constitutes a low-pressure return chamber 28.
  • the volume within the housing 15 between the lands 23 and 24 and surrounding the stem 20 constitutes another low-pressure return chamber 29.
  • the volume within the housing 15 between the lands 22 and 23 and surrounding the stem 20 constitutes a high-pressure supply chamber 30.
  • a piston 32 is slidable within the piston chamber 17 and into the left end pumping chamber 26.
  • the piston has end faces 33 and 34 with one face 34 bearing against the left end of the slide 19.
  • Another piston 35 is slidable within the piston chamber 18 and into the right end pumping chamber 27.
  • the piston 35 has end faces 36 and 37 with one end face 36 bearing against the right end of the slide 19.
  • a tube 42 that leads from a source (not shown) of highpressure power fluid opens into the high-pressure supply chamber 30.
  • Tubes 43 and 44 that lead to low-pressure power fluid receivers (not shown) are connected from the low-pressure return chambers 23 and 29.
  • the chamber is always in constant communication with the high-pressure power fluid source and the chambers 28 and 29 are always in constant communication with low-pressure power fluid returns.
  • Two tubes 45 and 46 lead from a source (not shown) of lowpressure fluid that is to be pumped to an area (not shown) of higher pressure.
  • This low-pressure fluid source may be the same as or different from the low-pressure fluid source already mentioned.
  • the area of higher pressure to which the pumped fluid is to be delivered is different from the high-pressure fluid source already mentioned.
  • Other tubes 49 and 50 lead to the last-mentioned area (not shown) of higher pressure to which the low-pressure fluid is to be pumped.
  • the tubes 51 and 52 open from the pumping chambers 26 and 27, respectively.
  • a tube 56 that communicates with the slide chamber 16 of the valve 11 and with the left end piston chamber 17 of the valve 12.
  • Another tube 57 communicates with the slide chamber 16 of the valve 11 and with the right end piston chamber 18 of the valve 12.
  • the tube 56 communicates with the high-pressure power fluid supply chamber 30 and the tube 57 communicates with the low-pressure power fluid return chamber 29.
  • the piston 22 moves past the tube 56 to block communication between the tube 56 and the high-pressure power fluid supply chamber 30 and to thereafter establish communication between the tube 56 and the low-pressure power fluid return chamber 28.
  • the piston 23 moves to block communication between the tube 57 and the low-pressure power fluid return chamber 29 and to thereafter establish communication between the tube 57 and the high-pressure power fluid supply chamber 30.
  • a tube 58 communicates with the slide chamber 16 of the valve 12 and with the left end piston chamber 17" of the valve 13.
  • a similar tube 59 communicates with the slide chamber 16' of the valve 12 and with the right end piston chamber 18" of the valve 13.
  • the tube 58 communicates with the highpressure power fluid supply chamber 30 and the tube 59 communicates with the low-pressure power fluid return chamber 29'.
  • the tube 58 communicates with the low-pressure power fluid return chamber 28 and the tube 59 communicates with the highpressure power fluid supply chamber 30.
  • a tube 60 communicates with the slide chamber 16" of the valve 13 and with the left end piston 17 of the valve 11.
  • Another tube 61 communicates with the slide chamber 16" of the valve 13 and with the right end piston chamber 18 of the valve 11.
  • the tubes 60 and 61 alternately communicate with the high-pressure power fluid supply chamber 30 and with the respective low-pressure power fluid return chambers 28" and 29" as the slide 19" reciprocates between its left and right positions.
  • High-pressure power fluid is continuously supplied to the high-pressure power fluid supply chamber 30 of the valve 11, to the high-pressure power fluid supply chamber 30' of the valve 12, and to the high-pressure power fluid supply chamber 30" of the valve 13.
  • the low-pressure power fluid return chambers 28, 28', and 28" and 29, 29', and 29" of the valves 11, 12, and 13 are in constant communication with demand areas for low-pressure power fluid through the respective tubes 43, 43', and 43" and 44, 44, and 44".
  • the tubes 47, 47', and 47" and 48, 48, and 48" which communicate with the left and right pumping chambers 26, 26', and 26' and 27, 27', and 27" of each of the three valves ll, 12, and 13 are in constant communication with the source of low-pressure fluid to be pumped to a higher pressure area.
  • the tubes 49, 49', and 49" and 50, 50', and 50" are in constant communication with the higher pressure area to which fluid is to be pumped.
  • this pump may be used to pump low-pressure liquid into the boiler or vapor generator against the high pressure existing in the vapor generator.
  • Other fluids that must flow against a high-pressure resistance may be pumped by this fluid-powered pump.
  • the diameters of the pistons 32, 32', and 32" and 35, 35', and 35" relative to the diameters of the pistons on the slides 19, 19', and 19" may be varied to vary the pumping pressure and rate of flow of the pumped fluid. As the diameters of the pistons 32, 32 and 32" and 35, 35', and 35 are increased, the pumping rates will be increased, but the pumping pressures will be decreased.
  • FIG. 2 illustrates a modification wherein A subscripts have been added to numerals which designate parts similar to those shown in FIG. I.
  • the piston 32A and its counterpart at the other end of the valve 11A are of larger diameter than the pistons 21A, 22A and the other pistons of the slide 19A. In the valve of FIG. 2, the rate of flow of the pumped fluid is increased but the pumping pressure is reduced.
  • a fluid-powered pump comprising a first slide valve, a second slide valve, and a third slide valve, each valve comprising: a housing with a slide reciprocative therein, a pumping chamber in each slide valve for causing pumping of a fluid through the pumping chamber as the slide of the slide valve reciprocates, a conduit for delivering low-pressure fluid to each pumping chamber, a conduit for delivering fluid from the pumping chamber to a high-pressure receiver, means defining high and low-pressure power fluid chambers in each slide valve, movable with movements of theslide thereof, a highpressure power fluid source, a low-pressure power fluid return, means communicating the high-pressure power fluid source to the high-pressure power fluid chamber, means communicating the low-pressure power fluid return to the lowpressure power fluid chamber, means to connect the valves in a closed cycle comprising: conduit means for individually connecting the power fluid chambers of one slide valve with separate pressure-responsive portions of the slide of another slide valve in a serial closedcircuit, means in each valve to port the last-named conduit
  • the low-pressure power fluid chamber comprises a divided chamber with portions on opposite sides of the first power fluid chamber.
  • the pump of claim 1 including a piston in each pumping chamberhaving one end bearing against the slide and the opposite end constituting a said pressure-responsive portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
US848148A 1969-08-07 1969-08-07 Fluid-powered pump Expired - Lifetime US3597116A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84814869A 1969-08-07 1969-08-07

Publications (1)

Publication Number Publication Date
US3597116A true US3597116A (en) 1971-08-03

Family

ID=25302472

Family Applications (1)

Application Number Title Priority Date Filing Date
US848148A Expired - Lifetime US3597116A (en) 1969-08-07 1969-08-07 Fluid-powered pump

Country Status (6)

Country Link
US (1) US3597116A (enrdf_load_stackoverflow)
JP (1) JPS4837523B1 (enrdf_load_stackoverflow)
CA (1) CA922970A (enrdf_load_stackoverflow)
DE (1) DE2037929A1 (enrdf_load_stackoverflow)
FR (1) FR2056757A5 (enrdf_load_stackoverflow)
GB (1) GB1312518A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711224A (en) * 1971-02-16 1973-01-16 Borg Warner Fluid powered expansion engine
CN108591138A (zh) * 2018-05-04 2018-09-28 东莞海特帕沃液压科技有限公司 一种四柱塞液压增压器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS507624U (enrdf_load_stackoverflow) * 1973-05-17 1975-01-27
JPS5063729A (enrdf_load_stackoverflow) * 1973-10-08 1975-05-30

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942553A (en) * 1958-05-09 1960-06-28 Gen Motors Corp Gas driven hydraulic actuator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942553A (en) * 1958-05-09 1960-06-28 Gen Motors Corp Gas driven hydraulic actuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711224A (en) * 1971-02-16 1973-01-16 Borg Warner Fluid powered expansion engine
CN108591138A (zh) * 2018-05-04 2018-09-28 东莞海特帕沃液压科技有限公司 一种四柱塞液压增压器

Also Published As

Publication number Publication date
DE2037929A1 (de) 1971-02-25
GB1312518A (en) 1973-04-04
FR2056757A5 (enrdf_load_stackoverflow) 1971-05-14
JPS4837523B1 (enrdf_load_stackoverflow) 1973-11-12
CA922970A (en) 1973-03-20

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