WO2016004453A1 - Moteur à air - Google Patents

Moteur à air Download PDF

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Publication number
WO2016004453A1
WO2016004453A1 PCT/AU2015/000140 AU2015000140W WO2016004453A1 WO 2016004453 A1 WO2016004453 A1 WO 2016004453A1 AU 2015000140 W AU2015000140 W AU 2015000140W WO 2016004453 A1 WO2016004453 A1 WO 2016004453A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
chambers
ports
chamber
fluid
Prior art date
Application number
PCT/AU2015/000140
Other languages
English (en)
Inventor
David Luiz Santa
Original Assignee
Joe Santa & Associates Pty Limited
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
Priority claimed from AU2014902628A external-priority patent/AU2014902628A0/en
Application filed by Joe Santa & Associates Pty Limited filed Critical Joe Santa & Associates Pty Limited
Priority to US15/322,265 priority Critical patent/US20170130581A1/en
Priority to AU2015286240A priority patent/AU2015286240B2/en
Publication of WO2016004453A1 publication Critical patent/WO2016004453A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
    • F01B11/004—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type in which the movement in the two directions is obtained by two single acting piston motors, each acting in one direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B19/00—Positive-displacement machines or engines of flexible-wall type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B23/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01B23/08—Adaptations for driving, or combinations with, pumps
    • 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
    • F01L23/00—Valves controlled by impact by piston, e.g. in free-piston machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/36—Engines with parts of combustion- or working-chamber walls resiliently yielding under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B71/00—Free-piston engines; Engines without rotary main shaft
    • F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby

Definitions

  • the present invention relates to motors that use a compressed gas as a driving fluid to drive the motor, and more particularly but not exclusively to air motors that receive compressed air to drive the motor.
  • Air motors are known to have a number of working chambers to which compressed gas is delivered to drive pistons at least partly enclosing the working chambers.
  • Valve mechanisms co-ordinate the delivery of compressed air sequentially to the chambers, as well as provide for exhausting air from the chambers, to cause reciprocati on of the pistons.
  • the pistons are connected by a single shaft, with the pistons reciprocating along the axis of the shaft.
  • An example of such an air motor is described in International Patent Application
  • a further apparatus such as a pump, is connected to the abovementioned shaft so as to be driven by the abovementioned air motor.
  • a disadvantage of known air motors, such as the air motors discussed above, is that they make inefficient use of the driving fluid (compressed air).
  • a motor that is driven by a compressed fluid including:
  • a first piston at least aiding in enclosing the first chamber; a second working chamber;
  • a second piston at least aiding in enclosing the second chamber
  • valve assembly enables passage of the fluid between the two chambers.
  • valve assemblies is configured to sequentially connect each the chambers to the air inlet and air outlet, with the chambers being connected to enable the fluid to be transferred therebetween before one of the chambers is connected to the inlet.
  • the motor further includes a controller to control operation of the val ve assembly.
  • valve assembly is a primary valve assembly
  • controller is a pilot valve assembly
  • the primary valve assembly includes a movable valve member having a plurality of passages, and a plurality of ports surrounding the valve member, with the passages in the movable valve member connecting the ports to provide for the flow of the fluid through the valve assembly.
  • the ports include a plurality of ports connected to the inlet, a plurality of ports connected to the outlet, and a plurality of ports connecting the chambers, with the valve member being moved to sequentially connect the chambers to the inlet and outlet, and to connect the chambers.
  • the motor includes:
  • the movable valve member has a longitudinal axis, with passages being located at longitudinally spaced locations along the movable valve member.
  • the ports are located, relative to said longitudinal axis, at longitudinally spaced positions.
  • the motor is configured to receive compressed air as the driving fluid.
  • Figure 1 is a schematic sectioned top plan of an air motor
  • Figure 2 is a series of schematic side elevations of a primary valve employed in the air motor of Figure 1, with the movable valve member in positions A, B, C and D.
  • the air motor 10 receives compressed air in order to be driven.
  • the air motor 10 includes a central val ve assembly 1 1 including a base 12.
  • the base 12 is of a unitary construction, that is it is formed of a single piece.
  • the base 12 has opposite side faces 13 to which there are sealingly attached caps (covers) 14 that, in co-operation with flexible diaphragms 15 provide working chambers 16 and 17.
  • Each of the diaphragms 15 has secured to it a piston 18, with pistons 18 being connected by a piston rod (connecting member) 19 so that the pistons 18 reciprocate linearly in unison along the longitudinal axis 20 of the piston rod 19.
  • a clamp member 21 To aid in securing each diaphragm 15 to its associated piston 18 there is provided a clamp member 21.
  • the piston rod 19 extends through passage 48.
  • the axis 20 is also the longitudinal axis of the passage 48.
  • Each diaphragm 15 has a portion abutting the adjacent piston 18 that effectively forms part of the piston 18.
  • the faces 13 are generally parallel but spaced along the axis 20 and generally
  • a pilot valve 51 is located in the base 12 and includes a first cavity 22 with a
  • a primary valve 52 that includes a second cavity 25 within which there is located a movable valve member 26.
  • the cavity 25 has a longitudinal axis 28 along which the member 26 moves, with the axis 28 being generally parallel to the axis 20.
  • the base 12 includes inlet ducting 50, exhaust (outlet) ducting 29, and intermediate ducting 30.
  • the inlet ducting 50 communicates with an inlet port member 31 providing a threaded passage 32 that would typically be threadably engaged with a high pressure hose via which compressed air is delivered to the motor 10.
  • the ducting 29 communicates with a threaded outlet passage 33, of the outlet port member 31 , that would be typically attached to a muffler and via which exhaust air gas exits the motor 10.
  • the intermediate ducting 30 connects the first chamber 22 with the second chamber 25.
  • Fourth ducting 34 and 54 respectively connect the chambers 16 and 17 with the second chamber 25.
  • valve member 24 projects beyond the base 12 so as to extend into each of the chambers 16 and 17.
  • compressed air is deli vered to the passage 32 from where it is delivered to the chamber 22. Air is simultaneously delivered to the chamber 25 from passage 32 for delivery to the chamber 17 (with reference to Figure 1 ). At this time, compressed air is also delivered from cavity 22 to the chamber 25 via ducting 30 and 42 to apply pressure to the end face 35 of the member 26 so that compressed air is delivered to chamber 17.
  • the compressed air in the chamber 17 forces the piston 18 in the direction 36.
  • the pistons 18 are connected by the rod 19, ultimately the piston 18 of the chamber 16 engages the end of the valve member 24 and forces it in the direction 36. In this configuration compressed air is then redirected to the chamber 16 to cause movement of the piston rod 18 in a direction opposite the direction 36.
  • valve member 24 Simultaneously air is directed via valve member 24 away from the end face 35 of valve cavity 25 to the exhaust ducting 29 through valve chamber 22, while air is being directed into the cavity so as to apply pressure to the end face 37 to force the valve member 26 in a direction opposite the direction 36 so that the compressed air from passage 28 is now delivered to the chamber 16.
  • This movement of the valve member 26 also alternately connects the chambers 16 and 17 to the exhaust ducting 29.
  • the chamber 17 is connected to the exhaust ducting 29.
  • the chamber 16 receives compressed air
  • the chamber 16 is connected to the exhaust ducting 29. Accordingly, the valves 51 and 52 are operated to alternately connect the chambers 16 and 17 to the inlet passage 32 and the exhaust passage 33.
  • the valve 52 includes a sleeve 55 located in the chamber 25, and within which the valve member 26 is slidably located. Seals 56 sealingly connect the sleeve 55 and member 26.
  • the sleeve 55 has ports 61 to 68 which are arranged as follows:
  • ports 61 and 64 communicate with the ducting 34;
  • ports 65 and 68 communicate with the ducting 54;
  • ports 63 and 66 communicate with the ducting 50.
  • the ports 61 and 64 provide for the flow of the compressed air to and from chambers 16, the ports 65 and 68 provide for the flow of compressed air to and from the chamber 17, the ports 62 and 67 provide the exhaust of air from the chambers 16 and 17, while the ports 63 and 66 provide for the delivery of compressed air to the chambers 16 and 17.
  • the seals 72 connect the member 26 and sleeve 55.
  • the sleeve 55 may also be a plurality of spacers (rings) located between the seals 56, with the seals 56 connecting the member 26 and base 12.
  • the ports 61 to 68 would be annular with respect to the axis 38.
  • Figure 2 shows the sequence of movements of the movable valve member 26, from the position at which the valve member 26 is located when the chamber 16 has reached its maximum volume, that is the piston 18 associated therewith has reached its maximum travel.
  • valve member 24 When the above has occurred, the valve member 24 is moved to the left (with reference to Figure 1). Upon doing so compressed air is delivered to the chamber 25, in particular compressed air engages the end face 35 of the member 26 to drive the member 26 in the direction 36.
  • the passage 69 of the member 26 will move from connecting ports 63 and 64, to a position at which it connects parts 64 and 65. Simultaneously the passage 71 will move from connecting parts 67 and 68. Compressed air that was previously in the chamber 16 will be at least partly exhausted into the chamber 17 via parts 63 and 64 (position B). Further movement of the member 26 in the direction 36 will isolate the chamber 16 from the chamber 17, while connecting the chamber 17 to a supply of compressed air by connecting the ports 65 and 66 with passage 69.
  • the passage 70 of the member 26 connects the port 61 , 62 so that the chamber 16 is allowed to exhaust (position C).
  • the pilot valve 51 can be replaced with an actuator, such as a servo motor or an electrically operated linear actuator, that is coupled to the member 26 and operated to cause the movement thereof as discussed above.
  • an actuator such as a servo motor or an electrically operated linear actuator, that is coupled to the member 26 and operated to cause the movement thereof as discussed above.
  • piston 18 will have engaged the member 24 and driven it to a position displaced from the position shown in Figure 1, that is a position displaced to the right (position D).
  • compressed air is then delivered to the chamber 25 adjacent the end face 37 to drive the member 26 in a direction opposite direction 36.
  • the ports 64 and 65 are connected so that compressed air in the chamber 17 can be transferred to the chamber 16, and then subsequently the chamber 16 and 17 isolated with the chamber 17 then connected to the port 67, and the chamber 16 connected to the port 63. That is chamber 17 is able to exhaust, and chamber 16 receiving compressed air.
  • the passages 69, 70 and 71 are annular with their central axis, the axis 38.
  • the passages 69, 70 and 71 are located at spaced positions along the axis 38, with the ports 61 to 68 also located at spaced positions longitudinally relative to the axis 38.
  • the base 12 includes a fifth ducting 38 that extends between the opposite faces 13.
  • Each cap 14 is sealingly connected to its associated adjacent face 13 by means of a seal 39.
  • Each seal 39 includes an annular portion 40 that slidably engages the piston rod 19, as well as having a weakened portion 41 that is aligned with the ducting 38.
  • Holes 45 and 49 alternately provide for the valve member 24 to extend therethrough, along with aligning with ducting 34 to provide for air flow to and from chambers 16 and 17.
  • hole 45 provides the air flow while hole 49 allows the valve member 24 to extend therethrough.
  • hole 49 provides the air flow while hole 45 allows the valve member 24 to extend therethrough.
  • the base 12 has faces 46 that are engaged by the member 31.
  • the faces 46 are generally perpendicular to the faces 13 and are therefore generally parallel to the axis 20.
  • the ducting 30, 34 38, 50 and 54 can be formed through the faces 13 and 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Fluid-Driven Valves (AREA)
  • Actuator (AREA)

Abstract

La présente invention concerne un moteur à air (10) qui comporte des chambres opposées (16, 17) auxquelles de l'air comprimé est fourni de manière alternée pour entraîner le moteur (10). Le moteur (10) comporte une soupape principale (52) qui régit la fourniture de l'air comprimé vers les chambres (16, 17) de sorte qu'au moins une partie de l'air comprimé soit transférée à l'autre chambre pour permettre l'entraînement des pistons (18).
PCT/AU2015/000140 2014-07-08 2015-03-13 Moteur à air WO2016004453A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/322,265 US20170130581A1 (en) 2014-07-08 2015-03-13 An air motor
AU2015286240A AU2015286240B2 (en) 2014-07-08 2015-03-13 An air motor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2014902628 2014-07-08
AU2014902628A AU2014902628A0 (en) 2014-07-08 An air motor

Publications (1)

Publication Number Publication Date
WO2016004453A1 true WO2016004453A1 (fr) 2016-01-14

Family

ID=55063380

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2015/000140 WO2016004453A1 (fr) 2014-07-08 2015-03-13 Moteur à air

Country Status (3)

Country Link
US (1) US20170130581A1 (fr)
AU (1) AU2015286240B2 (fr)
WO (1) WO2016004453A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110374683A (zh) * 2019-07-22 2019-10-25 六安永贞匠道机电科技有限公司 一种双向间歇式气动马达

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6241487B1 (en) * 1998-11-10 2001-06-05 Warren Rupp, Inc. Fluid powered diaphragm pump
WO2006055626A2 (fr) * 2004-11-17 2006-05-26 Proportionair, Inc. Systeme de commande pour pompe a membrane pneumatique
WO2011140579A1 (fr) * 2010-05-14 2011-11-17 Joe Santa & Associates Pty Limited Moteur pneumatique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6241487B1 (en) * 1998-11-10 2001-06-05 Warren Rupp, Inc. Fluid powered diaphragm pump
WO2006055626A2 (fr) * 2004-11-17 2006-05-26 Proportionair, Inc. Systeme de commande pour pompe a membrane pneumatique
WO2011140579A1 (fr) * 2010-05-14 2011-11-17 Joe Santa & Associates Pty Limited Moteur pneumatique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110374683A (zh) * 2019-07-22 2019-10-25 六安永贞匠道机电科技有限公司 一种双向间歇式气动马达
CN110374683B (zh) * 2019-07-22 2021-04-20 六安永贞匠道机电科技有限公司 一种双向间歇式气动马达

Also Published As

Publication number Publication date
US20170130581A1 (en) 2017-05-11
AU2015286240A1 (en) 2017-01-19
AU2015286240B2 (en) 2018-08-16

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