GB2402975A - Rotary single vane pump with simplified vane-and-socket joint - Google Patents

Rotary single vane pump with simplified vane-and-socket joint Download PDF

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Publication number
GB2402975A
GB2402975A GB0314231A GB0314231A GB2402975A GB 2402975 A GB2402975 A GB 2402975A GB 0314231 A GB0314231 A GB 0314231A GB 0314231 A GB0314231 A GB 0314231A GB 2402975 A GB2402975 A GB 2402975A
Authority
GB
United Kingdom
Prior art keywords
vane
socket
rotor
pump
housing
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.)
Withdrawn
Application number
GB0314231A
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GB0314231D0 (en
Inventor
Carmeli Adahan
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0314231A priority Critical patent/GB2402975A/en
Publication of GB0314231D0 publication Critical patent/GB0314231D0/en
Priority to IL160096A priority patent/IL160096A/en
Priority to AU2004201396A priority patent/AU2004201396C1/en
Priority to JP2006516793A priority patent/JP2006527818A/en
Priority to CA002527268A priority patent/CA2527268A1/en
Priority to US10/559,382 priority patent/US20060228245A1/en
Priority to ES04734594T priority patent/ES2279371T3/en
Priority to PCT/IL2004/000448 priority patent/WO2004111455A1/en
Priority to DE602004003814T priority patent/DE602004003814T2/en
Priority to EP04734594A priority patent/EP1633980B1/en
Priority to AT04734594T priority patent/ATE348957T1/en
Publication of GB2402975A publication Critical patent/GB2402975A/en
Priority to US11/979,162 priority patent/US20080063552A1/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0065Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/007General arrangements of parts; Frames and supporting elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/005Removing contaminants, deposits or scale from the pump; Cleaning
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/30Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/32Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in groups F04C2/02 and relative reciprocation between co-operating members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/30Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/32Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in groups F04C2/02 and relative reciprocation between co-operating members
    • F04C2/332Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in groups F04C2/02 and relative reciprocation between co-operating members with vanes hinged to the outer member and reciprocating with respect to the inner member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00Manufacture
    • F04C2230/60Assembly methods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00Manufacture
    • F04C2230/70Disassembly methods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/80Other components
    • F04C2240/805Fastening means, e.g. bolts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00Synthetic polymers, e.g. plastics; Rubber

Abstract

A rotary single-vane pump 10, comprising a drive unit including an eccentric drive member, and a pump unit 12, including a housing 16, with a cylindrical inner peripheral wall defining a cavity, and a cylindrical rotor 20, disposed eccentrically in the cavity. The rotor 20, is engaged to the eccentric drive member so as to scroll the inner peripheral wall and to define a pump chamber therewith. The housing and the rotor are connected to each other, across the pump chamber, by a vane-and-socket joint. The housing has an inlet port 24, adjacent one side of the joint and an outlet port 26, adjacent the other side of the joint. The joint is designed such that the vane 22, can both slide along the socket 28, and rock in the socket with the joint maintaining fluid tightness. A sealing barrier 35, is disposed between the rotor periphery and the inner peripheral wall, so as to prevent fluid communication between the inlet port 24, and the outlet port 26, when the scroll zone is over the inlet port or the outlet port or between them. The pump unit 12, is attachable to and detachable from the drive unit (14, fig 3) by simple manipulation without tools and is made of material suitable for its usage as a disposable unit.

Description

2402975 SJNGLE-VANE BAlW:15R PUMP
FIELD OF THE INVENTION
e present invention relates generally to vane pumps and more par icularly, to sgle-vane pumps used for plumping of fluids in the chemical, medical and food industries, where the required process cleanliness necessitates Sequent pump cleaning or replacement.
BACKGROIJNI) OF TlI1D IPlVENTION A few examples of sirgle-vane pumps are provided in Japanese publication J? 06-200887. T1JC general layout of the pump includes a housing with a cylindrical cavity and a cylindrical rotor of lesser diameter eccentrically disposed therein. The 0 pump drive, by means of an eccentric crank, causes the rotor to orbit the cavity scrolling the inner peripheral vYal1 of the cavity. A pump chamber with crescent shape is thus defined between the rotor and the housing. The pump has a single vane joined to the rotor and tQ the housing across the pump chamber and dividing :he latter into an expanding chamber and contracting ch.am.ber. The pump further has inlet pow at one side of the vane, connected to He expanding chubby, Ed an outlet port at the other side of the vane, connected to the contracting, chamber. In one embodiment, the vane its in a radially sliding joint with. the housing and in a hinged joint win tire rotor. In a. second embodiment, the vane is also in a sliding joint with. the housing - however, the vane is not joined to the rotor but is urged to to the rotor periphery by a spring in die sliding joint so that a tip of the vane is in sliding contact with the rotor. In a third embodiment, the vane is integral with the rotor, while sliding through a socket which in its turn is rotatably joined to the l..ousing. l -2 -
In all embodiments, the outlet port is closed by a one-way checlc valve to prevent backflow of fluid, or pressure loss, when the scrolling zone of the rotor passes over the vane joint, since neither the vane, nor the rotor in that position isolate the inlet port from the outlet port of the pump.
SUIT AIlY OF THE INVENTION In accordance with one aspect of the presert invention, there is provided a rotary vane pump comprising a drive unit including an eccentric drive member, and a pump unit including a housing and a rotors Me housing teas a cylindrical inner peripheral wall defining a cavity, he rotor has a cylindrical peripheral surface and lo is disposed eccentrically in the cavity. Ibe rotor is engaged to the eccentric drive rnenber so as to scroll the inner peripheral wall in close proximity thereto. The inner peripheral wall and the rotor surface define a pump chamber between them.
The housing and the rotor are connected to each o er, across the pump cl:amb, by a vane-and-socket joint. The housing has an inlet port adjacent one side of the is assembly and an outlet port adjacent the other side of He assembly, both ports bairn open to the inner penpberal wall. A scroll zone of close proximity between the rotor surface and the inner peripheral wall of the housing divides the pump cLambeT into a first expanding fillet chamber in fluid connection with the inlet port and a second contracting outlet chamber in fluid connection with the outlet port.
so The joint is designed such that the vane and the socket make contact in a contact zone substantially shorter than the socket or He vane, and such that the vane can both slide along the socket, and rock in the socket while maintaining predetermined fluid tightness in tle contact zone.
In one embodiment, the soclcet has parallel walls, the vane has a thick rounded tip received in He socket md providing! together win the walls, the contact zone. The vane has a thin base protruding from the socket such that the vane is able to rock in the socket.
In another embodiment, the socket teas a mouth defined by two rounded provisions receiving the vane therebetween and providing therewith the contact zone. The socket has a wider cavity behind tl mouth such that the vane is able to rock in the socket. The vane may have parallel walls providing, at variable angles of rocking, variable fluid tightness in the contact zone. AIternatively, :he pro:rusions may be elastic, or vane thickness may vary along vane lend., thereby s providing, at variable angles of rocking, approxumately uniform. fluid tightness in the contact zone.
This design allows to build a single-vane pump where the single vane and the socket are integral with the housing or with the rotor and the pump is thus easy to manufacture and assem.bJe.
o In. accordance with another aspect of Me present invention, the rotary vane pump comprises a sealing barrier disposed between the rotor periphery and the inner peripheral wall, preferably adjacent to the inlet port or to the outlet port. The barrier is adapted to prevent fluid communication between the inlet port and the outlet port when the scroll zone is over the inlet port or the outlet port or between theta Preferably, a second sealing barrier is disposed adjacent to the other port. Th.c sealing barrier nary be made of compliant material and attached to the inner peripheral wall. or to the rotor periphery. Alternatively, it may be formed as cooperating teethe on:he inner peripheral wall and on the rotor peripheral surface.
Thereby, a single-vane pump is provided, which does not ulilize any checlvalves no Nor the pumping, but rather employs a barrier, to maintain separation between the pump inlet and outlet. Thus, the employment of oneway valves at the outlet is avoided, as such valves cause pressure spikes, as well as excessive wear, due to :heir high rate of activation.
In accordance wi:1 a further aspect of the present invention, the pump unit of the rotary vane pump is attachable to and detachable from the dove unit, the To units being constructed so that attaching else pump unit to the drive unit results in engagement of:lle rotor to the eccentric drive member. Pref.erably' Ale rotary vane pump includes attachment means allowing simple manipulation without tools.
Preferably, the rotor has a coD.cenuic socket, the eccentric drive member so comprises an eccentric cram: adapted to fit rotatably, by a bearing, into the socket when. the pump unit is attached to the drive unit, and Me l..ousing has a sealed opening allowing the crank to enter the socket. Preferably, the crank has a tapered head with such.. diameter and eccen. mcity that it can enter the socket irrespective of the alignment between the socket and the crank before the attaching s The pump un.i.t of the rotary vane pump is preferably made of materials suitable for its usage as a disposable unit, such as plastic.
Thus, a sin.gle-vane pump constructed of two Hairs components is provided: a per'.an.en.t drive unit, wl.licl.. contains all the costly components, and a low-cost disposable pump unit, which comes in contact with the pumped rx.cdia, and is easily and qui.cll.y replaceable. The disposable pump unil: contains all the pump parts which are subjected to high rate of wear' such that its replacement results in a complete pump assembly which is as good as new with respect to wear and cleanliness.
The rotary vane pump of tle present inven.tion may furler comprise a bypass channel, preferably integral with. the housing, with an inlet communication with the inlet port, an. outlet in cornmun.ication with the outlet port, and a one-way valve disposed between the inlet and the outlet 50 as to allow fluid {low bypassing said pump chamber, thereby maintaining a close to steady and uniform flow, while:he rotary vane pump is pulsating when. pumping. The pump so may finisher comprise a pulsation damper with an air chamber' connected to the outlet, adapted for damping the pressure r;ppl.e present at the rotary vane pump outlet.
Other objects and features of the present invention will become apparent when viewed in light of the detailed description of the preferred embodiment: svhen taken in conjunction Wi01 the attached drawings and appended claims. - s -
BRIEF DESCRIPTION OF THE DRAWINGS
In. order to understand the invention and its application, a preferred embodiment will now be described, by way of non-limiting example only7 with reference to the accompanying drawings, in which.: s Fig 1 is a schematic cross sectional view of a single vane pump accordance verity a preferred embodiment of He present invention.; Fig. 2 is a schematic cross sectional view of the single vane pump of Fig. 1, with the rotor in registration Wid1 He vicinity of He fluid inlet and outlet ports, and mounted pulsation damper.
lo Fig 3 is a cross sectional view of the single vane pump of Fig. 1, showing the attachment and coupling of the pump unit to the drive unit and the eccentric drive renumber; Fig. 4 is a cross sectional view of the single vary pump of Fig. 3, showing the disassembly and decoupling of the pump unit from the drive unit and the eccentric drive member; and Figs. 5, 6 and 7 are schematic cross sectional views of vane-aD.d-socket joints of the single-vane pump in accordance with alternative embodiments of He present invention.
DI:TAILEI) DESCIlIPTlON OF TtIE INVEI\TION no With reference to Figs. 1:hrough 4, there is shown a single vane pump 10 in accordance with a preferred embodiment of the present invention. The sirigle vane pump 10 comprises a pump unit 12 add a dime unit 14 detachably attached to each other.
The pump unit 1.2 includes a b.ousing 16 with a cylindrical. cavity, and a cylindrical. rotor 20 disposed eccentrically in. the cavity of the housing so as to define a pump chamber 1. 8. The housing 15 has an inlet port 24 and an outlet port 26 communicating with the pump cbx.ber 15, and a radial vane socket 28 disposed between. the ports 24 and 26. Ports 24, 26 and the socket Z8 are opened. at the inner peripb.exal wall 30 of the pump chamber. The distal end of socket 28 is in communication Wi01 tb.e inlet side of the pop via a chamel 27. Me housing].6 includes a bypass channel 29 with an inlet 30 in communication with the inlet port 24, an outlet 32 in communication with the outlet port 26, and a one-way valve 34 between the inlet and the outlet Two sealing barriers 35 are disposed al: the peripheral wall 30, adjacent the inlet port 24 and the outlet port 26 respectively, at their far hest sides from the vane socket 28. The housing 16 has a central opening 36 at its wall 37 and a cover 35 closing the pump chamber 18.
Rotor 20 is disposed in the housing cavily in. sliding contact with the cover and the wall 37, sealing the opening 36 by means of a ring seal 40. Rotor 20 has to a radial vane 22 with a Wick cylinder tip 42 engaged in the vane socket 28 so Mat the vane 22 can slide along the radial socket 28. Vane tip 28 contacts the parallel walls of socket 28 in a sealing fit. The base of d..e vane 22 its thinner than the:ip 42 such that the vane can rock in. the socket 28 around tb.e thick Up 42, still maintaining the sealing fit. Thus, the vane 22 and the socket 28 constitute a joint 7.5 providing both sliding and rocking. The rotor 20 fi=her has a central socket 44 Icing the opening 36.
DrjYE unit].4 has a rotary shaft 50 with an ececrtric crank 52 equipped with. . a bearing 54. When pump unit 12 is attached to drive unit 14, crank 52 is received by central socket 44 and shut 50 is coaxial with the cylinder pump chamber 18.
so The radial. geometrical relationship between drive unit 14, eccentric crank 52, rotor 20 and d.iam.cter of the cyl.in.der pump chamber 18 is such blat rotation of rotary shoal 50, via the crank 52, causes rotor 20 to scroll the inner peripheral wall.
30, maintaining contact or near-contact with the wall at a scroll zone 56. Due to the vane-and-socket joint of rotor 20 to the housing 16' where the tip 42 of radial vane 22 is confined to vane socket 28, Me rotor performs sim.ulneously a reciprocating motion parallel to die vane socket, and a transverse rocli. ng motions. The channel 27 facilitates sliding of the tip 42 by letting fluid in and out of tb.e distal. end of socket i 2g.
During this complex motion, rotor 20 and housing 16 define two isolated and variable volumes: an. expanding inlet chamber 58 and a. contacting outlet chamber 60. Eypan.ding chamber 58 is defined between the inlet side of the vane 22, a portion. of the peripheral wall 30 between. vane socket 28 and scroll zone 56, and an adjacent portion. of the rotor's periphery. Contracting chamDcr 60 is defined between outlet side of the vane 22, the remaining portion of tile peripheral wall 30 between vane socket 28 and scroll zone 5G, and the remaining portion of the rotor's periphery.
When the eccentric crank 52 rotates counterclockwise (see Fig. 1)' scroll zone 56 also travels counterclockwise, arid the expanding chamber 58 expands, thereby drawing or suctioning fluid Dotn the inlet 30, through the inlet port 24. At lo the same time, the contracting charnbe 60 contracts, forcing the fluid it contains, througl,. the outlet pod: 26 to the outlet 32. In tile position shown in Fig. 2, scroll zone 56 has reached vane socket 28 so Mat the contracting chamber has vanished while the expanding ch.arnber has attai.red its maximal volume, after which it starts contacting and becomes the coraciing chamber, while at the same:.e a "new" Is expanding chamber is born.
In the position of Fig. 2, rotor 20 is in contact with the sealing barriers 35, thereby sealing ofpossi.ble communication between. inlet port 24 and outlet port 26 around rotor 20. Barriers 35 are made of elastic material., such as rubber, such that they are compressed by the rotor 20 as it scrolls by em. In the absence of barriers JO 35, when:he rotor 20 is iD the il].ustral:ed position, or rather m. any position where scroll zone SG is on inlet port 24 or on outlet port 26, or between. them, pressurized fluid from outlet port 26 could flow around rotor 20 back to inlet port 24. This undesirable reverse flow is tra.ditional.ly prevented by use of a one-vay valve at the outlet port. Sealing barriers 35 perforrx. an equivalent function, preventing fluid back flow from the outlet port 26 to the irdet port 24, without: the negative effects, which valves in.troducc.
Notably, fluid back flow may be prevented also by a single sealing barrier 35. In. such case, the single barrier should provide the sealing, of a slightly wider gap For example, if the leD barrier in Fig. is removed, the remaining right barrier must keep tb.e gap between rotor 20 and the inner wall 30 sea]ed until scrol.] zon.e 56 reaches a point to tl..e left of inlet port 24.
It would be obvious to those skilled in the art that any barrier, suitably disposed beveen rotor 20 and inner peripheral wall 30, Inky perform Me function s unblocking off the ba.cl<-fl.ow path Mom outlet por: 26 to inlet port 24. For example, :he barriers may be disposed on the rotor periphery opposite ports 24 and 26.
Alternatively, a. Ia.byxin.th barrier 86, shown in Fig. 6' may be formed as cooperating teeth on the inner pen.p]..eral wall and on the rotor peripheral surface.
lye bypass one-way valve 34 is optional. It is made of resilient material, e such as rubber.. which may deflect under pressure differential applied thereto, permitting fluid to flow Morn. the inlet 30 to the outlet 32. Thus, continuous flow of fluid may be maintained also al: the time when expanding chamber 58 and contracting chamber 60 are not displacing fluid.
In the illustrated preferred embodiment of Fig. 2, the single vane pump 10 is is shown assembled with an additional pulsation damper 64 which in. this embQdilnent is a trapped air reservoir with fluid outlet 66. The damper 64 absorbs and dampens pressure ripple or fluctuations resultant from Me cyclic nature of the fluid displacement in. the single vane pux'. p lO. Trapped air 68 expands and contracts in response to pressure fluctuations of the fluid at the outlet 32, enhancing, together JO with. by-pass valve 34, stable and un.i.f.orm flow and pressure of the pumped fluid at the outlet 66.
Fig. 3 illustrates We pump unit 12 of the single vane puking 10, attached to the drive unit l4, with rotor 20 coupled to eccentric crania 52, via bearing 54. The pump unit is retained in place by wing nuts 70, which are manually screwed and 2s tightened on threaded studs 72 anchored. in drive unit 14. Drive unit 14 has a profusion 74 mated to recess 76 in t]:.e housing 16 such that pump unit 12 is keyed in. proper relation to drive unit 3.4.
Fig. 4 illustrates pump unit 12 detached from drive unit 14, with wing nuts removed Mom threacled. studs 72. Cover 38 may be an integral part otpump unit so 1.2 permanently attached to housing 16, or it may be separate from housing 16. In -9 - the illustrated embodiment, it functions both. as a cover for the b. ousing 16 as well as a retaining plate for retaining pump unit I2 engaged to drive unit 14. Jt will be appreciated that there are other simple and f.ast means for manual attaching the pw.:p unit to the drive unit, for example, a bayonet loci; or a threaded collar.
Eccentric crank 52 has a tapered head 78 facilitating the insertion of the crank 52 into tl.e socket 44 of rotor 20. Tb.e diameter of tapered head 78 and eccentricity of the crank 52 are selected so that tapered head 78 can enter into crank socket 44 while the pu up unit is being attached to the drive unit, irrespective of the alignment of tl..e socket 44 and crank 52. For this purpose, the crank eccen.tnci is o preferably less than. one-fou of the crank head diameter (tb.e latter is presumed equal to Me socket 44 diameter).
The rotary vane pump of the present invention can. be easily adapted for disposable use in the cl..cmical, medical and food industries, where the required process cleanliness necessitates frequent pump cleaning or replacement. For this purpose, the pump unit is made of low-cost materials suitable for its usage as a disposable unit, such as plastic. Ike unique construction of the vane-and-socket connection allows manufa. ctunog of integral rotor and integral housing, without additional assembly of a vane or socket. Tb.us, the pump parts which come in contact Wife tb.e pumped media me cheap, d. easily Ad quickly replaceable by a so simple manipulation without using any tools. The disposable pump unit advantageously contains all the pump parts that are subject to high. rate of wear and contamination, while the pennanent drive unit, including the eccentric crank win the bearing, contains all costly components. Thus, t}. e replacement of the pump unit results in a. complete pump assembly which is as good as new wits:. respect to wear 2s and cleanliness.
While particular embodiments of:J..e invention. leave been. shown and described' numerous variations and alternate embodiments will occur to those skilled in the art. Accordingly. it is interceded that the invention be limited only in teens of the appended claims.
For example, Me vane-and-socket joint in the pump of the present invention may be designed in a number of various ways, as shown in Figs. 5, 6 and 7. In an alternative embodun.ent of: Fig. 5, tb.e vane 22 is made integral with lousing ld, while vane socket 28 is formed within rotor 20. As shown in Fig. 6, the vane 22 s may be made flat while the socket 28 may be formed with a mouth confined by two protrusions 80 and a wider inner pelt 82. It would be appreciated that in this simplified design, the fluid tightness of We contact between the vane and the socket pro;rusions may vary with. :he angle of rocking. One possibility l:o ensure uniform tightness is to make tb.e protrusions 80 elastic. Another possibility is showr in Fig. 7, where walls 84 of the vane 22 are slightly concave SO that the vane will have uniformly tight contact with. the provisions 80 at ail variations of the rocking angle.

Claims (1)

  1. CLAIIVIS: 1. A rotary vane pump comprising a drive unit including an
    eccentric drive member, and a pump unit including a housing with a cylindrical inner peripheral wall defining a cavity, a rotor with. a cylindrical peripheral surface, said rotor being disposed eccentrically in said cavity arid being engaged to said eccentric drive member so as to scroll said Inner peripheral wall in close proximity thereto when the drive member rotates the rotor, said irner peripheral wall and the rotor peripheral surface defining between them a pump chan.ber, said housing and said rotor being connected to each. other, across said pump chamber, by a 0 vane-an.d-socket joint comprising a vane and a vane socket, said housing having an inlet port adjacent to one side of said assembly and an outlet port adjacent to the other side of said assembly, both ports being open to said inner peripheral wall, wherein said joint is designed such. that.sai.d Vane and said socket contact in. a narrow s contact zone substantially shorter than said socket or said vane, and such that said vane can both slide along said socket, and rocl; in said socket with respect to said contact zone, with said joust maintaining predetermined fluid tightness in said contact zone.
    2. The rosy vane pump accordun.g to Claim 1, wherein said socket has so parallel walls' said vane has a thick rounded tip received in said socket and providing, iD cooperation with said walls, said contact zone, said vane filrth.er having a thin base protruding from said socket such that said vane is able to rock in said. socket.
    3. The rotary vane pump according to Claim 1, wherein said socket has a :5 mouth defined by two protrusions receiving said vane th.erebetween and providing therewith said contact zone, said socket fiddler having a voider cavity behind said mouth such. that said vane is able to rock in said socket. - 12-
    4. The rotary vane pump according to Claim 3, wherein said vane has parallel, walls providing, at variable angles of rocl.cing' variable fluid tightness ire said contact zone.
    5. Tb,e rotary vane pump according to Claim 3, wherein said vane has parallel walls while said protrusions are elastic, thereby providing, at variable angles of rocking, approximately uniform. fluid tightness in said contact zone.
    6. The rotary vane pump according to Claim 3, wherein said vane has tradable thickness along its length such that, at variable angles of rocking, approximately unif,onn fluid tightness is provided in said contact zone.
    to 7. The rotary vane pump according to Claim. 1, wherein said base of said vane is integral with one of said rotor and said housing while said vane soclcet is irtegrally formed within. the other of said rotor and said housing.
    8. The rotary vane pump according to Claim 7, wherein said' vane extends along a radius of the rotor or Me housing with. svllich said base is integral, and said vane socket extends along a radius of the rotor or the housing within which said socket is fondled.
    9. The rotary van e pump according to Clainn. 7, wherein. said base of said vane its integral. with said housing.
    10. The rotary Marie pump according to Claim 7, wherein said base of said vane so is integral with said rotor.
    11. The rotary vane pump according to Claum 1, farther comprising a sealing barrier disposed between said rotor surface and said iMer peripheral wall and adapted to prevent: fluid communication between said inlel: port and said outlet port when said rotor its in said close proximity opposi;e on.c of said inlet port and outle: port or between them 12. Me rotary vane pump according to Claim 11, wherein said scaling barr er is disposed adjacent to one of said inlet or outlet por;s.
    13. The rotary vane pump according to Claim 12, wherein a. second sealing barrier is disposed adjacent to the other of said inlet or outlet ports.
    14. The rotary vane punnp according l;o Claim 11, wh.erein said sealing barrier is attached to said housing.
    1.5. The rotary vane pump according to Claim. 11, wherein said sealing barrier is atta.cl.ed to said rotor.
    s 16. The rotary vane pump according to Claim. ll, wherein. said sealing barrier is Snide of elastically deformable material.
    17. The rotary vane pw..p according to Claim J.1, wherein said sealing bamer is formed as cooperating teeth on said inner peripheral wall and or said rotor peripl.eral surface.
    to 1.8. Idle rotary vane pump according to Claim 1, further comprising a bypass channel win ar, inlet in communication with said inlet port, an outlet in communication with said outlet port, and a one-way valve disposed between said inlet and said outlet so as to allow fluid flow from. said inlet to said outlet bypassing said pump chamber l9. The rotary vane pump according to Claim 18, wherein said bypass cb.annel is integral win said housing.
    20. The rotary vane pump according to Claim 1, further con.prising a pulsation damper connected to said outlet port.
    21. A pump unit for usage with the rotary vane punap of Claim 1.
    no 22. The pump unit according to Claim 21, wherein said pump unit is attachable to and d.eta.c.hable Dorn said drive un.i.t.
    23. The pump unit according to Claim. 22, wherein said pump unit and said drive unit are constructed so that attaching said pump unit to said drive Audit results in engagement: of tile rotor to the eccentric Disc member.
    :5 24. The pump unit according to Claim. 23, including attachment means allowing for said attach.in.g by simple manipulation wi.tlout tools.
    25. The pump unit accordln.g to Claim. 23, wherein said rotor has a concentric sockets said eccentric drive member comprises an eccentric crank adapted to fit rotatabJy into said concentric socket when said pump Ufi.t is attached to said drive l ld- unit thereby providing said engagement, and said housing has an opening allowing said crank to enter said socket, 26. The pump unit according to Claim 25, wherein, said crank comprises a bearing permanently affixed thereto, said bearing providing the rotatable flit of said s crank to said socket.
    27. The pump unit according to Claim 26, wherein said crane has a tapered head and has such diameter and eccentricity that said tapered head will enter said socket during said attaching irrespective of the alignment between said socket and said cram; before said attaching.
    lo 28. The pump unit according to Claim 22, wb,erein said pump unit its made of materials suitable for its usage as a disposable unit.
    29. A rotary vane pump comprising a drive unit including an, eccentric drive member, and a pump unit including a b.ousing with a cylindrical. inner peripheral wall defining a cavity, a rotor with a cylindrical peripheral surface? said rotor being disposed eccen:ricall.y in said cavity and being erg,aged to said eccentric drive member so as to scroll said inner peripheral wall in close proximity thereto when :he drive member rotates tile rotor, said inner peripheral wall and the rotor surface defining between them a pump chamber, said housing and said rotor being conn.ect;ed to each other? across said pump chamber, by a vane-and-socket joint JO comprising a vane and a vane socket, said housing b.aving an inlet port adjacent one side of said assembly and an outlet port adjacent the other side of said assembly, both ports being open to said inner peripheral wall, wherein said rotary vane pump fwther comprises a sealing barrier disposed between said rotor surface and said inner peripheral wall and adapted to prevent flui.d :5 communication between said inlet port arid said outlet por: vialed said rotor is in said close proximity opposite one of said inlet port avid outlet port or between them.
    30. The rotary vane pump according to Claim 29, wherein said joint is designed such that said vane and said socket contact in a narrow contact zone substantially shorter than said socket or said vane, and such that said vane can both - 15 slide along said socket, and rock in said socket while maintaining predetermined fluid i:ighess in said contact zone.
    31. The rotary vane pump according to CJ.aim. SO, wherein said vane its in.teal with one of said rotor and said housing while said Yam socket is integrally for ned vithj the other of said rotor and said housing.
    32. Me rotary vane pump according to Claim 29, wherein said sealing barrier is made of elastically deformable material 33, The rotary vane pump according to Claim. 29, wherein said sealing barrier is fonned as cooperating teeth on said inner peripheral.wall and on. said rotor lo peripheral surface.
    34. A pump unit for usage withtb.e rotary Vane pump of Claim 29.
    35. The pump unit according to Claim 34, wherein said pump unit is attachable to arid detachable from said dove urn'.
    36. The pump unit according to Claim 35, wherein said pump unit is made of is matena]s suitable for its usage as a disposable unit.
    37. A rotary vane pump constructed and arranged substantially as hereinbefore described with reference to and as illustrated by the accompanying drawings.
    38. A pump unit constructed and arranged substantially as hereinbefore described with reference to and as illustrated by the accompanying drawings.
GB0314231A 2003-06-18 2003-06-18 Rotary single vane pump with simplified vane-and-socket joint Withdrawn GB2402975A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
GB0314231A GB2402975A (en) 2003-06-18 2003-06-18 Rotary single vane pump with simplified vane-and-socket joint
IL160096A IL160096A (en) 2003-06-18 2004-01-28 Single-vane rotary pump or motor
AU2004201396A AU2004201396C1 (en) 2003-06-18 2004-04-05 Single-vane rotary pump or motor
AT04734594T ATE348957T1 (en) 2003-06-18 2004-05-24 SINGLE BLADE ROTARY PUMP OR MOTOR
ES04734594T ES2279371T3 (en) 2003-06-18 2004-05-24 PUMP OR ROTATING MOTOR OF PALETA UNICA.
CA002527268A CA2527268A1 (en) 2003-06-18 2004-05-24 Single-vane rotary pump or motor
US10/559,382 US20060228245A1 (en) 2003-06-18 2004-05-24 Single-vane rotary pump or motor
JP2006516793A JP2006527818A (en) 2003-06-18 2004-05-24 Single vane rotary pump or motor
PCT/IL2004/000448 WO2004111455A1 (en) 2003-06-18 2004-05-24 Single-vane rotary pump or motor
DE602004003814T DE602004003814T2 (en) 2003-06-18 2004-05-24 ROTARY PISTON OR ENGINE WITH A SINGLE WING
EP04734594A EP1633980B1 (en) 2003-06-18 2004-05-24 Single-vane rotary pump or motor
US11/979,162 US20080063552A1 (en) 2003-06-18 2007-10-31 Single-vane rotary pump or motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0314231A GB2402975A (en) 2003-06-18 2003-06-18 Rotary single vane pump with simplified vane-and-socket joint

Publications (2)

Publication Number Publication Date
GB0314231D0 GB0314231D0 (en) 2003-07-23
GB2402975A true GB2402975A (en) 2004-12-22

Family

ID=27636864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0314231A Withdrawn GB2402975A (en) 2003-06-18 2003-06-18 Rotary single vane pump with simplified vane-and-socket joint

Country Status (2)

Country Link
GB (1) GB2402975A (en)
IL (1) IL160096A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007128303A1 (en) * 2006-05-10 2007-11-15 Cor Pumps + Compressors Ag Rotary piston machine
EP3282086A1 (en) * 2016-08-10 2018-02-14 Baier & Köppel GmbH & Co. KG Pump, in particular gear pump, for conveying of additives
CN105179237B (en) * 2008-02-18 2019-05-03 南洋理工大学 Rotary blade type compressor and its manufacturing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE371144A (en) *
GB926495A (en) * 1961-12-19 1963-05-22 Bernard Henry Refson Improvements in or relating to rotary pumps
GB1033454A (en) * 1964-03-11 1966-06-22 Inpaco Trust Reg Improvements in and relating to rotary piston compressors
EP0687816A1 (en) * 1993-12-24 1995-12-20 Daikin Industries, Limited Oscillating type rotary compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE371144A (en) *
GB926495A (en) * 1961-12-19 1963-05-22 Bernard Henry Refson Improvements in or relating to rotary pumps
GB1033454A (en) * 1964-03-11 1966-06-22 Inpaco Trust Reg Improvements in and relating to rotary piston compressors
EP0687816A1 (en) * 1993-12-24 1995-12-20 Daikin Industries, Limited Oscillating type rotary compressor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007128303A1 (en) * 2006-05-10 2007-11-15 Cor Pumps + Compressors Ag Rotary piston machine
US8360748B2 (en) 2006-05-10 2013-01-29 Cor Pumps + Compressors Ag Rotary piston machine
CN101443554B (en) * 2006-05-10 2013-03-27 罗伯特·博世有限公司 Rotary piston machine
CN105179237B (en) * 2008-02-18 2019-05-03 南洋理工大学 Rotary blade type compressor and its manufacturing method
EP3282086A1 (en) * 2016-08-10 2018-02-14 Baier & Köppel GmbH & Co. KG Pump, in particular gear pump, for conveying of additives

Also Published As

Publication number Publication date
GB0314231D0 (en) 2003-07-23
IL160096A (en) 2007-06-17
IL160096A0 (en) 2004-06-20

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