EP0430789B1 - Drehkolbenmaschine mit Rollkolben - Google Patents

Drehkolbenmaschine mit Rollkolben Download PDF

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Publication number
EP0430789B1
EP0430789B1 EP90403344A EP90403344A EP0430789B1 EP 0430789 B1 EP0430789 B1 EP 0430789B1 EP 90403344 A EP90403344 A EP 90403344A EP 90403344 A EP90403344 A EP 90403344A EP 0430789 B1 EP0430789 B1 EP 0430789B1
Authority
EP
European Patent Office
Prior art keywords
vane
control rod
piston
rotary machine
abutment
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
EP90403344A
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English (en)
French (fr)
Other versions
EP0430789A1 (de
Inventor
Christian Boussicault
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.)
Sanofi SA
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Sanofi SA
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Filing date
Publication date
Application filed by Sanofi SA filed Critical Sanofi SA
Priority to AT90403344T priority Critical patent/ATE92589T1/de
Publication of EP0430789A1 publication Critical patent/EP0430789A1/de
Application granted granted Critical
Publication of EP0430789B1 publication Critical patent/EP0430789B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
    • F01C20/06—Control of, monitoring of, or safety arrangements for, machines or engines specially adapted for stopping, starting, idling or no-load operation

Definitions

  • the present invention relates to a rotary machine with rolling piston, comprising a housing, a cylindrical chamber formed inside the housing, a drive shaft coaxial with said chamber and provided with an eccentric, a rolling piston which rolls against the internal surface of the wall of the cylindrical chamber during the rotation of the shaft, a pallet slidably mounted relative to the casing of the machine and dividing the free space around the piston into a low pressure compartment into which opens an orifice d suction of a fluid and a high-pressure compartment into which opens a fluid delivery orifice, at least one spring interposed between the casing and the pallet to apply the latter in normal operation against the peripheral surface of the rolling piston, and a pallet position control device comprising a control rod movable in translation under the action of selective control means and being able to move between a first position in which the pallet is kept in contact with the peripheral surface of the rolling piston and the movements of the pallet are not limited by said control rod, and a second position in which the pallet is retained by the control rod in a disengaged position without permanent contact with
  • Various types of rotary machines such as compressors, vacuum pumps, motors or hydraulic pumps are provided with a rolling piston which rolls against the internal surface of the wall of a cylindrical chamber and is connected by an eccentric or crank part to a drive shaft coaxial with said chamber, the rolling piston being able, in a particular embodiment, to be mounted free in rotation around a drive ring itself connected to the crank.
  • a separating flap or pallet slidably mounted in the casing of the machine, divides the free space around the piston in two variable volume compartments, namely a low pressure compartment into which opens a fluid suction port and a high pressure compartment into which opens a fluid delivery port.
  • the separating pallet is applied against the periphery of the rolling piston by a spring interposed between the casing and the pallet.
  • the rolling piston in certain applications, rotates at very high speeds, of the order of several thousand revolutions per minute. It is thus particularly delicate to allow a movable finger or pawl to penetrate a notch of the separating flap perpendicular to the direction of movement of the flap which oscillates as a function of the position of the rolling piston.
  • a movable finger or pawl Each time the pawl enters the receiving notch formed in the flap, there is a phenomenon of wear of the pawl and of the walls of the notch, so that the lifetime of the device is very limited.
  • the risks of blockage are not negligible when entering or exiting the pawl.
  • the known device does not make it possible to achieve a progressive deactivation or regulation of the power of the compressor insofar as the flap can only be retracted in one position.
  • the present invention aims to remedy the aforementioned drawbacks and to make it possible to deactivate or regulate the power of rotary machines with rolling piston, in a simple, convenient and efficient manner, using a light, robust and inexpensive device. , which only absorbs a minimum no-load power.
  • the object of the invention is still more precisely to provide an adjustment of the position of a rotary machine pallet in a precise and reliable manner while ensuring both high operating safety and great flexibility of use.
  • a rotary piston machine of the type defined at the head of the description characterized in that the control rod is arranged in the plane of the pallet and comprises a retaining stop formed at the bottom of the control rod and engaged in a housing formed in the pallet which has an upper wall traversed by the control rod and cooperating with said stop and has a height corresponding at least to the maximum spacing between the peripheral surface of the piston and the housing the rotary machine, so that the pallet can move freely relative to the stop when the latter is in lowered position.
  • the stroke of the control rod is large enough that the pallet can be retracted completely if necessary when the stop is in the raised working position.
  • the means for selective control of the control rod comprise a piston integral with the control rod and actuated by a hydraulic or pneumatic control.
  • the means for selective control of the control rod comprise a core integral with the control rod and immersed in an electromagnet coil to which electrical control signals are applied.
  • the control device further comprises a return spring returning the control rod and the stopper to their rest position in the absence of external control.
  • control rod is arranged in a median plane of the pallet and the springs are interposed between the casing and grooves formed in the pallet on either side of the housing to keep the pallet applied against the peripheral surface of the rolling piston when the stop is in the rest position.
  • the selective control means of the control rod are actuated at predetermined times with respect to the rotation of the rolling piston.
  • the device according to the invention can be used in all cases of applications of rotary machines with rolling piston which must operate sequentially while their drive motors operate without stopping.
  • the invention is applicable in particular to the de-loading of compressors used for vehicle brakes or even to the de-loading of automobile air conditioning compressors.
  • the invention is also applicable to multi-cylinder machines in order to make it possible to produce an operation at fractional power depending on whether all or part of the control devices applied to the pallets of different cylinders are actuated. For example, with a three-cylinder machine, it is thus possible to cause operation at full load, two-thirds of load, one-third of load or zero load depending on whether none, one, two or three devices pallet retraction control according to the invention are actuated.
  • Figure 1 shows a sectional view of a rotary machine with rolling piston, such as a compressor, to which the invention is applicable.
  • the compressor comprises a casing 9 defining a chamber 40 with a cylindrical wall in which is disposed a rotary annular piston 7 which can roll in contact with the wall of the chamber 40.
  • a crown 8 for driving the piston 7 is mounted inside the piston 7 for example with the interposition of a needle bearing 35, so as to be able to slide relative to the piston 7.
  • the timing of the piston 7 on its raceway is ensured by elastic compensation means 32 bearing on the shaft central drive 31 and on the bore of the crown 8.
  • the crown 8 is coupled to a crank 33 of the central shaft 31 by a pin 34.
  • a separating flap or flat pallet 1 mounted sliding in a housing 41 of the casing 9 projects into the chamber 40 and divides the free space around the piston 7 into two compartments 38, 39 with variable volume.
  • the low pressure compartment 39 is in communication through an inlet port 36 with a suction line, not shown, while the high pressure compartment 38 is in communication through outlet ports 37, 37 ', at least some of which are fitted with non-return valves, with a discharge line not shown.
  • the above description relates to a rotary machine with rolling piston of a type known per se.
  • springs 2, 3 are interposed between the upper wall 4 of the casing 9 and housings 5, 6 formed at the upper part of the pallet 1 to maintain the lower face of the pallet 1 in support on the peripheral surface of the rolling piston 7 when the device 10 for controlling the position of the pallet 1, which will be described below, is at rest.
  • the device 10 for controlling the position of the pallet 1, shown in FIGS. 1 and 2 essentially comprises a control rod 14 disposed in the plane of the pallet 1 substantially in a median plane of the latter.
  • the control rod 14 carries at its lower part a retaining stop 12 which is engaged in a housing 11 formed in the pallet 1.
  • the housing 11 has an upper wall 25 which is crossed by the control rod 14 and cooperates with the stop 12 when the latter is moved upwards by the control rod 14.
  • the housing 11 has a height corresponding at least to the maximum spacing between the peripheral surface of the piston 7 and the wall of the cylindrical chamber 40.
  • the pallet 1 When the stop 12 is in its lowered rest position (Fig 1 and 2), the pallet 1 can, thanks to the opening 11, move freely relative to the stop 12 and can rise up against the action of the springs 2, 3 when the piston rotary 7 pushes back the lower edge of the pallet 1 during its travel.
  • the control rod 14 of the stop 12 can itself go up against the action of a return spring 16 interposed between a piston 15 secured to the rod 14 and the fixed upper wall of a housing 17 in which slides said piston 15.
  • the spring 16 returns the control rod 14 and the stop 12 to their rest position shown in Figures 1 and 2, for which the device 10 does not change normal operation of the rotary machine which operates at full load.
  • FIGS. 1 and 2 show a first embodiment of means for selective control of the control rod 14.
  • the piston 15 secured to the rod 14 and provided with a seal 23 can slide in the bore 17 under the action of a hydraulic or pneumatic pressure applied by the orifice 18 located in the wall of the cylinder 26 defining the bore 17, below the piston 15 placed in the rest position.
  • the piston 15 then rises against the action of the spring 16 by driving up the rod 14, the stop 12 and the pallet 1 which is driven by the part 25 cooperating with the stop 12.
  • the piston can move freely without being in contact with the pallet 1 and the machine operates empty. It is however possible to provide for not raising the rod 14 and the stopper at half-height for example, so that the rolling piston 7 comes into contact at its periphery with the lower edge of the pallet 1 only during one fraction of the piston stroke.
  • the rotary machine thus operates at reduced but not zero load.
  • the application of pressure to the control device 10, or if necessary of a back pressure through the orifice 19, can by moreover, be carried out at predetermined times with respect to the rotation of the rolling piston 7, if a means for detecting the rotation of the piston 7 is provided.
  • the working position of the rod 14 or its return to a rest position can be done gradually, in stages, the stop 12 being able to be raised or lowered gradually over several turns of the piston 7. This does not cause any particular wear of the stop 12 placed in the housing 11, which moves in the same direction as the oscillations of the pallet 1, unlike the case of known devices in which a pawl moves in a direction perpendicular to the moving the pallet.
  • FIG. 3 shows an alternative embodiment according to which the rod 14 is not actuated by pressure but by electromagnetic means.
  • the control rod 14 may also include a guide portion 15 of larger cross section circulating in the housing 17 of a housing 26 and serving as a bearing for the end of a return spring 16, the other of which end door against the bottom of the housing 17.
  • the rod 14 is however extended by a plunger core 20 which can penetrate into the air gap of an electromagnet 21 placed for example in a housing 22 surmounting the housing 26.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Hydraulic Motors (AREA)
  • Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Claims (7)

  1. Drehkolbenmaschine mit Rollkolben, mit einem Gehäuse (9), einer im Inneren des Gehäuses (9) gebildeten zylindrischen Kammer (40), einer zu dieser Kammer (40) koaxialen und mit einem Exzenter (33) versehenen Antriebswelle (31), einem Rollkolben (7), der bei Drehung der Welle (31) auf der Innenwand der zylindrischen Kammer (40) abrollt, einem bezüglich des Gehäuses (9) der Maschine gleitbeweglich montierten Schierber (1), der den Freiraum um den Kolben (7) in einen Niederdruckbereich (39), in den eine Ansaugöffnung (36) für ein Fluid mündet, und einen Hochdruckbereich (38), in den eine Fluid-Ausstoßöffnung (37) mündet, unterteilt, mindestens einer zwischen dem Gehäuse (9, 4) und dem Schieber (1) angeordneten Feder (2, 3), zum Andrücken des Schiebers gegen die Außenfläche des Rollkolbens (7) während des Normalbetriebs, und einer Vorrichtung (10) zur Steuerung der Stellung des Schiebers, mit einem unter der Einwirkung selektiver Steuerungsmittel (21; 18, 19) verschiebbaren Steuerstab (14), der zwischen einer ersten Stellung, in der der Schieber (1) in Kontakt mit der Außenfläche des Rollkolbens (7) gehalten wird und die Bewegungen des Schiebers (1) nicht durch die Steuerstange (14) eingeschränkt sind, und einer zweiten Stellung, in der der Schieber (1) durch den Steuerstab (14) in einer ausgerückten Stellung ohne dauerhaften Kontakt mit der Außenfläche des Rollkolbens (7) gehalten wird, so daß die Drehkolbenmaschine nicht mehr mit voller Leistung arbeiten kann, beweglich ist,
    dadurch gekennzeichnet, daß der Steuerstab (14) in der Ebene des Schiebers (1) angeordnet ist und ein im unteren Bereich des Steuerstabs (14) gebildeten Rückhalteanschlag (12) umfaßt, der in eine Aussparung (11) im Schieber (1) eingreift, wobei der Schieber eine obere Wand (25) aufweist, durch die der Steuerstab (14) hindurch verläuft und die mit dem Anschlag (12) zusammenwirkt und eine Höhe aufweist, die wenigstens dem maximalen Abstand zwischen der Außenfläche des Kolbens (7) und dem Gehäuse (9) der Drehkolbenmaschine entspricht, so daß der Schieber (1) frei gegen den Anschlag (12) beweglich ist, wenn letzterer in abgesenkter Stellung ist.
  2. Drehkolbenmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Hub des Steuerstabs (14) ausreichend groß ist, um den Schieber (1) im Bedarfsfall vollständig einzuziehen, wenn der Anschlag (12) in angehobener Arbeitsstellung ist.
  3. Drehkolbenmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die selektiven Steuermittel des Steuerstabs (14) einen mit dem Steuerstab (14) verbundenen Kolben (15) umfassen, der durch eine hydraulische oder pneumatische Steuerung betätigt wird.
  4. Drehkolbenmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die selektiven Steuermittel der Steuerstabs (14) einen mit dem Steuerstab (14) verbundenen Kern (20) aufweisen, der in eine elektromagnetische Spule (21) eintaucht, an die elektrische Steuersignale angelegt werden.
  5. Drehkolbenmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sie eine Rückholfeder (16) aufweist, die den Steuerstab (14) und den Anschlag (12) in Abwesenheit einer äußeren Steuerung in ihre Ruhestellung bringt.
  6. Drehkolbenmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Steuerstab (14) in einer Mittelebene des Schiebers (1) angeordnet ist und daß Federn (2, 3) zwischen dem Gehäuse (4) und dem Schieber (1) beiderseits der Aussparung (11) gebildeten Nuten (5, 6) angeordnet sind, um der Schieber (1) gegen die Außenfläche des Rollkolbens (7) angedrückt zu halten, wenn der Anschlag (12) in Ruhestellung ist.
  7. Drehkolbenmaschine nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die selektiven Steuermittel (21; 18, 19) des Steuerstabs (14) zu festgelegten Zeitpunkten bezogen auf die Drehung des Rollkolbens (7) betätigt werden.
EP90403344A 1989-11-28 1990-11-27 Drehkolbenmaschine mit Rollkolben Expired - Lifetime EP0430789B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90403344T ATE92589T1 (de) 1989-11-28 1990-11-27 Drehkolbenmaschine mit rollkolben.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915654A FR2655093A1 (fr) 1989-11-28 1989-11-28 Machine rotative a piston roulant.
FR8915654 1989-11-28

Publications (2)

Publication Number Publication Date
EP0430789A1 EP0430789A1 (de) 1991-06-05
EP0430789B1 true EP0430789B1 (de) 1993-08-04

Family

ID=9387874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403344A Expired - Lifetime EP0430789B1 (de) 1989-11-28 1990-11-27 Drehkolbenmaschine mit Rollkolben

Country Status (7)

Country Link
US (1) US5131826A (de)
EP (1) EP0430789B1 (de)
JP (1) JPH03179188A (de)
AT (1) ATE92589T1 (de)
CA (1) CA2029796A1 (de)
DE (1) DE69002591D1 (de)
FR (1) FR2655093A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105164374A (zh) * 2013-03-15 2015-12-16 兰迪·科赫 旋转式内燃机

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
US5439360A (en) * 1991-07-22 1995-08-08 Carrier Corporation Self-adjusting crankshaft drive
US5871342A (en) * 1997-06-09 1999-02-16 Ford Motor Company Variable capacity rolling piston compressor
KR100466620B1 (ko) * 2002-07-09 2005-01-15 삼성전자주식회사 용량가변형 회전압축기
KR100565338B1 (ko) 2004-08-12 2006-03-30 엘지전자 주식회사 용량가변형 복식 로터리 압축기 및 그 운전 방법 및 이를 구비한 에어콘 및 그 운전 방법
WO2007060688A1 (en) * 2005-11-24 2007-05-31 Vikrant Dhoke A high efficiency rotary internal combustion engine
US9267504B2 (en) 2010-08-30 2016-02-23 Hicor Technologies, Inc. Compressor with liquid injection cooling
CA2809945C (en) 2010-08-30 2018-10-16 Oscomp Systems Inc. Compressor with liquid injection cooling
DE102012024704A1 (de) * 2012-12-18 2014-06-18 Robert Bosch Gmbh Rollkolbenverdichter mit veränderbarer Förderleistung
CN106468178B (zh) * 2015-08-21 2018-06-08 北京星旋世纪科技有限公司 应用压动闸阀机构的转动装置、转动系统及流体机械
CN106704191A (zh) * 2017-03-07 2017-05-24 东莞市风能工业设备有限公司 一种凸轮多级压缩机
FR3093140B1 (fr) * 2019-02-26 2022-05-06 Mouvex Pompe volumétrique à piston excentré
CN111412139B (zh) * 2019-10-30 2021-12-31 广东美芝制冷设备有限公司 旋转式压缩机及具有其的冷冻循环装置

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GB484707A (en) * 1936-10-09 1938-05-09 Standard Pressed Steel Co Improvements in or relating to rotary compressors, pumps, blowers and the like
FR1008520A (fr) * 1948-04-22 1952-05-19 Machine hydraulique, rotative, reversible, utilisable comme pompe ou moteur
US2671605A (en) * 1949-08-27 1954-03-09 Gen Electric Unloader and overload protector for rotary compressors
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JPS5566693A (en) * 1978-11-15 1980-05-20 Matsushita Electric Ind Co Ltd Refrigerant compressor
DE2946906C2 (de) * 1979-11-21 1985-02-14 Bitzer Kühlmaschinenbau GmbH & Co KG, 7032 Sindelfingen Rollkolbenverdichter
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105164374A (zh) * 2013-03-15 2015-12-16 兰迪·科赫 旋转式内燃机

Also Published As

Publication number Publication date
CA2029796A1 (en) 1991-05-29
EP0430789A1 (de) 1991-06-05
ATE92589T1 (de) 1993-08-15
JPH03179188A (ja) 1991-08-05
DE69002591D1 (de) 1993-09-09
US5131826A (en) 1992-07-21
FR2655093A1 (fr) 1991-05-31

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