CA2116001A1 - Pump or compressor unit - Google Patents
Pump or compressor unitInfo
- Publication number
- CA2116001A1 CA2116001A1 CA 2116001 CA2116001A CA2116001A1 CA 2116001 A1 CA2116001 A1 CA 2116001A1 CA 2116001 CA2116001 CA 2116001 CA 2116001 A CA2116001 A CA 2116001A CA 2116001 A1 CA2116001 A1 CA 2116001A1
- Authority
- CA
- Canada
- Prior art keywords
- sleeve
- pump
- housing
- fluid
- compressor unit
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/024—Multi-stage pumps with contrarotating parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/022—Multi-stage pumps with concentric rows of vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D3/00—Axial-flow pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D5/00—Pumps with circumferential or transverse flow
- F04D5/002—Regenerative pumps
- F04D5/003—Regenerative pumps of multistage type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
A contra-rotating pump or compressor unit is made axially compact by moving the fluid along concentric annular flow path portions between which the flow direction is reversed. The unit can comprise concentric contra-rotating sleeves (31, 32, 35) provided with impeller vanes or blades and defining the flow path portions between them, or axially adjacent contra-rotating impeller assemblies each comprising concentric rings with impeller vanes between them. The flow direction reversal can be effected either by fixed housing portions co-operating with the sleeves or rings or by annular walls (34, 62) connecting alternate sleeves (31, 32, 35) or rings.
Description
-~ WO 93J042B8 PCr/GB92/0l528 a~l PU~ OR COMPRESSOR UNIT
The invention relates to a pump or compressor unit of the ki~d having impeller means rotatable about an axis f or directing f luid received at a f luid inlet along a f luid f low path to a f luid outlet .
Contra-rotating pump or c:ompres~or units of this kind, al; shown for example in EP O 217 847 ~FD6 ) and U.S. Patent 2 2 34 7 3 3 to Jendra~;ik ~ have contra rota~ing impeller blades haped ~o as to indu~l3 f luid f low in the axial direction .
Such units neces~;arily have substantial axial length.
Also known from WO 91~04417 and EP-A-O 348 342 are pump or compressor units of this kind in which concentric rings of the blad~s or vanes are ro~at~d in oppo~ed dîre~tion~;, the blade~3 or vane~; being zLrranged o move a f luid in a dirt3ction generally radially of the axis o~ rotatioll. Such pump~ or compre~sor unit~ can provide advantage~; mec:hanically but hav l30me di~advantage~ in r~ pect of pre~;ure generation. The pre~t inverltion accordingly iB aorlcerned with providing a pump or ~:ompressor unit free of uch di~advantages.
The in~ntion ac~ordingly provides a pump or compre~or u~it of this kirld in which ~he f luid f low path has portions ex1:erlding axially or approximately axially and of which the direation~ al~rnate. The pump or c:ompre~;or unit of the inYention thu~ provides the ad~ar~tages of an axial f low typs of unit with the co~pa~tn~ in the axial direction of a radial f low unit O The directions of the f low path portic:~ns can depart ~ubstantially from the axial direction but will at lea~t oYerlap along the axis to obtain the desired axial aompaetne~. In a preferr~d con6tructio~, the f~ ow path through the impeller means c~ompri~3e~ any appropriate number o:E c:oncentric anrlular f low path portion~, having a generally zig-zag configuration aE seen in radial cro~s-~ection.
The imp~ller means conveniently comprises f ir~t and econd co-operating set~3 of impeller blade~ or van~s which WO 93/04288 PCr/GB92/01~28 _ '~JL1~U~1 are pref erably con~ra-rotating, being rotated about the axi~
in opposite dires:tions in common, or by individually controllable drive meansO The unit o:E the invention can thus have a plurality of r:oncen~ric radially sp~ced drum or sleeve-like ~upp~rt~ for impeller bladeE; nr vane~;, the ~upport being rotatably driven in oppo~3ed directions ~ ancl guide means for re directing the fls:wi ng fluid through 180 or thereabc~ut between the f low path ~ectic)ns 0 The guide m~ans carl be integrated with the ~3upports ~;o as to rotate with the ~mpeller blades or can be stat ' ona~7, in which event they ca~ be part of the pump hou~ing.
Pump or compreæsor units of the invention c:an be employed to move liquids so as to have e~ entially only a pumping ac:tion, or ga~, or a m~xture o f liquid and ga~, f or ex~mple, in oil extraction appli~ation~; wh~re a mul~i-phase fluid has to be handled, when c:ompre~sion of the gas ~r the ga~eou~; componeg~t of the mixtur~ neces~arily ensue~.
~ he drive mearl~ f or contra-rotal:ing impeller means of the inventiun ~an compri~e ~eparate electric, hydraulic or pneumatic motor~; axially spaced with the imp~ller means betwe~n them. C108e coupled oil cooled electric motor~ can be u~;ed in a ~3ealed or " canlled " unit which i~ of ~pecial islter~3gt for in~tallations where 18akage8 to or from the unit can be critical ~ iEor example in ~ubsea in8tallations to prevellt water ingre~, and in top id~ applications to prevent puznp~d f lllid l~akag-e to the surrounding3 . A ~eparate high pre~;u:re ~eal chamber can be provided, 80 th~t a low~r pre~ure can be ~saintairled in the actual motor chamber.
~ he inv~ntio2l i~ further descrihed below, by way of example, with reference to the accompanying drawing6, in whi~::h like parts are indicat~d by like referenc:e slumerals and in which~
Figure 1 is a schematic sectional side view of a f irst pump or compr~ssor unit ~mbodying the invention;
WO 93/042~8 PCr/GB92/9)l528 Figure 2 is a liJce vi~w o~ a second pump or compr~s~or unit embodying the invention;
Figure 3 is a like vi~w of a third pump or compres~s~x unit embodying the invention; arad i?igure 3A is a f xagmentary view on a larger æcale illu~trating a sealing arrangement incorporated in the unit of Figure 3.
The pump or compre~sor unit illustrated in Figure 1 compri~;e~; a housing 1 of ge~erally c:ylindrical shape with a f luid inlet 2 and a f luid outlet 4 in resp~ctive oppo~ed end walls 5 and 6~, The end walls are annular and ~xterld round respective co-axial drive sh~fts 10 and 11~ aligned on an axis 12. 13ach ~haf~ is ro~atably driven by a re~pective ele~:tric motor ( not ~;how~ ), the drive 23haft~; having oppo~ d rotational directions. ~t their ~paced irmer end~;, the drive ~haft~ 10 and 11 mount respective rotor walls 14 aIld 15 at right angle~ to the axis 12.
The fluid irllet 2 i8 confititut~d by the housing end wall 5 and by an inwardly tapering fru~to-conical internal wall 7 haviIlg a short sleeve 9 whic:h i centr~d on the axi~ 12 and which ~oncenl;rically ~urrouIlds a ~hort sleeve 16 p:rojectillg outwardly fxom the rotor wall 14. Sealing means (~ot shown) operative be~wee~ ~he ~leeves 9 and 14 ~eals fluid entering the~unit through the luid inlet 2 from pre~suri~ed fluid in a worki~g chamber 20 within the hou~i~g 1, outwardly of the sl~eve 9. ~he chamber 20 i~ s~aled al~o by sealing mean~
op~ative between a sleeve 17 extendi~g inwardly from the end wall 6 and an outwardly extending sle~ve 19 on the rotor wall 15, the sleeve~ 17 and 19 being ~entred on the axis 12.
The fluid inlet 2 communicates freely with an inlet chamber 21 betw~en the two rotor walls 14,15 by way of apertures in the rotor wal~ 14 b~tween the drive shaft 10 and the ~leeve 16~
At it~ outer edge, the rotor wall 14 supports radially ... ..
WO 93/04288 PCr/~B92/01 ~ .L ;~
spaced inner and outer concentric sleeve~ 31 arld 32 which are connected together at ~he inlet end of ~he unit by an annular wall 34 of ~emi-circular radial c:ros~ ;ection. The rotor wall 15 c:arries at its outer end an int~rmedi~te ~leeve 35 received radially midway between the slee~és 31 and 32O
Annular rows of impeller vane~; or blades 36 and 37 proj ct towards eac:h other froIll the outer :;urface of the ~leeve 31 and from the inner su:rface of the sleeve 32. The blades 36 and 37 ar~3 received between and co-operate vane~; or blade~; 40 and 41 . The blades 3 6 ~nd 4 0 co operate to move f luid f rom the cha~er 21 axially towards the inlet end of the hou~ing and the blades 3 7 and 41 move the f luid again axially but in the c:ontrary directionO The pre~;suri~ed fluid thus enter~
the working chamber 20 f::om between the blades 37 and 41 and di~charge~ f rom the unit through the f luid outl~t 4 . The unit of ~igure 1 thu~; provides f s:~r ~wo axial c:oncent:cic f low path $ection~ but more such sections can be provided.
In the ~eco~d f orm of pump or compres or unit according to the inventi4n, shown in Figure 2, the hou~3ing 1 haf3 sleeve portian~ 51 and 52 extending outwardly of the hou~ing around the drive ~haf~s 10 and 11 and annular ~;eal means 54 and 55 between ~3ach driv~ shaft and the associated ~31eeve portion.
At the outer ~;ide o~ the outer impeller E31eeve 32, a seal 56 to the inner ~;urf ace of ~he ~3ide wall of the hou~ing i~
pro~J' ded, to ~3eparate the hou~ing interior into irllet aIld ostll3t chambers 57 arld 590 The rotor wall 14 ~upports ~he impeller lee-re 31 and 32, not dir~ctly D but by mearlE~ of an annlllar ritlg or ~et of impeller blade~ 610 The roto:r wall lS mount~ the interm~diate sleeYe 35 again indirectly; ~y means of an annular eIld wall 62 and the wall alæo mount~ an ann~l ar f3et of ~mpeller blades 64 arrarlged to eo-operate with l;he blades 61 to drive :Eluid entering the housing through the inlet axially in the direction towards the outlet 4. The wall 62 . ~ W0 93/04~X8 PCI'/GB92/01~28 w ~ O 1 c :3rresponds generally to the annular wall 34, being semi-circular in cross-section and functioning to reverse the direction of the f luid f lowing be~weerl the blades 61 and 64 whil~t diverting the flows radially outwardly t~ between the blade~ 3 6 and 4 0 .
The unit of Figu:re 2 thus functiorls generally ~i~Lilarly to that of Figure 1, bu~ provide~; f or axial pump or compre~or action on the incoming f luid in three concentric annular f low pas~;age sections instead of only two .
In the pump unit or compressor of the invention shown in Figure 3, the incoming f luid is moved axially in alternating directions along f our concentric axial paths, so that the inlet anL:l discharge direction:; are oppo~3ed, and radially ~p~ced s instead of being ali~ned, or substantially aligned, a~ in the unit~ of Figure~ 1 and 2. ~:
~ 50reover, wherea in the units of Figure~; 1 and 2, the f lowi:ng f luid is redirected f ;rom on~ axial f low path section to a~other by the axial guid~ means constituted by the aImular erld walls 34 and 62, which are secured to the blades to move with them , in ~igure 3, the guide m~3an~ are ~tationary and con~tituted part~; of the houæing of the unit.
Thu~, the hou~ g 1 i~ again approx~tely in the ~;hape of an axi~lly ~hort cylindrical dr~m, ~nd f luid inl~3t 2 and outlet 4 ~re both provided in the end wall 5, with the inlet ~pa~:~d radially inwardly of the outlet. Between the inlet arld the outlet, the housing 1 inc:ludes an annular wall poxtîon 71 which i8 approximately ~3smi--circular in radial crs:~s-~ection. The other end wall 6 îs formed with an inner or an outer arlnular end wall portion 72 and 74 of ;imilar, oppo~ed " ~hapes, with the wall portisn 71 radially midway be1;ween th~m.
Ths~ contra-xo~ating ~peller m~ans of the unit of Figure 3 comprise innermo~t axially adjacent annular rows or sets of blade~ 75 and 76 ~3xtending outwardly f:rom the rotor wall~ 14 WOs3/04288 PCT/GB92/0152 and 15 respectively ~o surrounding rings 77 and 79, from which extend a ~econd adjacent pair of sets of blade~ 75a and 76a themselves surrounded by ring~ 77a and 79a. Third sets of impeller blades 75b,7Sb ~uxround thP se~ond ~et~ and fourth ~e~s 75c,76b surround the third. Each impeller assembly, comprising foux concen~ric annular rows or ~ets of blades, ends at its outer periphery with a re~pective outer ring 77c,79c at the inner surface of the side wall of the housing.
Each axially adjacent pair of contra-rotating blade sets is arranged to move fluid axially but in direction~ which alternate from one pair to the radially adjacent pair. Thus the blades 75 and 76 co-operate to urge fluid entering at the inlet 2 in the direction of the arrow. The flow i~ then turned in the oppo~ite direction by ~he end wall portion 72 ~o a~ to be moved in ~he con~rary axial direction by the radially adjacent pair of blade set 75a,76b. ~he pressurised fluid flow i~ then turned again by the housing wall portion 71 back to it3 original i~let direction through the next set of blade~ 75b,76b and is finally turned once again by th wall portion 74 to be di~charyed from the hou~ing through the outlet 4 after pas~age through the fourth and outermo~t ~et of blades 75c 7 76c.
Each of the outer concentri~ annular fluid flow path ~ection~, co~tai~ing ~he axially adjacent aontra-rotating ~et~ of blades, ha~ to be ~ealed against fluid flow radially to the inwardly adjacent fluid flow path aection which i~ at a lower pre~sure. A suitabl~ ~ealing arra~gement "A", between the adjacent edge~ of the third pair of ring~ 77b,79b is shown i~ Figure 3A and compri~es interfitting s~al elements 80 and 81 extending axially from the adjacent edges o f the ring~, the ~e ling element~ being provided with interfltting configurations, here in the form of a triangular section ridge and groove.
~W093/04288 ~ ; ; PCT/GB92/0l~28 ` ~ `i` 6301 , , '.
~ he rings must be sealed also to the housing wall portions and sLmilar or other suitable ~eals are provided at appropriake positions in all the illustrated pump units of the invention. In this connection, reference may. be made to the ealing arrang ments described in WO 91/04417 and illu~trated in Figures la and lb of that document which is incorporated herein by reference.
The three pump units embodying the invention illustrated and described abo~e can be modified in variou5 ways within the scope of the inv~ntion. For example, the 1OW paths b~tween the inlets 2 and outle~s 4 can be of decreasing cros~-section in the flow direction, where the fluid is substantially compressed during its pas~age through the unit.
The fluid inlets and outlet~ can be differen~ly located in the housing walls, for example, and the flow direction can be radially inwards in~ead of outward~. Thu~, the inlet 2 of the unit of Figure 3 can be radially outwardly of the ou~let 4 instead of as ~hownO The invention can thu~ be embodied in a variety of way~ other than as specifically de~cribed.
~`:
The invention relates to a pump or compressor unit of the ki~d having impeller means rotatable about an axis f or directing f luid received at a f luid inlet along a f luid f low path to a f luid outlet .
Contra-rotating pump or c:ompres~or units of this kind, al; shown for example in EP O 217 847 ~FD6 ) and U.S. Patent 2 2 34 7 3 3 to Jendra~;ik ~ have contra rota~ing impeller blades haped ~o as to indu~l3 f luid f low in the axial direction .
Such units neces~;arily have substantial axial length.
Also known from WO 91~04417 and EP-A-O 348 342 are pump or compressor units of this kind in which concentric rings of the blad~s or vanes are ro~at~d in oppo~ed dîre~tion~;, the blade~3 or vane~; being zLrranged o move a f luid in a dirt3ction generally radially of the axis o~ rotatioll. Such pump~ or compre~sor unit~ can provide advantage~; mec:hanically but hav l30me di~advantage~ in r~ pect of pre~;ure generation. The pre~t inverltion accordingly iB aorlcerned with providing a pump or ~:ompressor unit free of uch di~advantages.
The in~ntion ac~ordingly provides a pump or compre~or u~it of this kirld in which ~he f luid f low path has portions ex1:erlding axially or approximately axially and of which the direation~ al~rnate. The pump or c:ompre~;or unit of the inYention thu~ provides the ad~ar~tages of an axial f low typs of unit with the co~pa~tn~ in the axial direction of a radial f low unit O The directions of the f low path portic:~ns can depart ~ubstantially from the axial direction but will at lea~t oYerlap along the axis to obtain the desired axial aompaetne~. In a preferr~d con6tructio~, the f~ ow path through the impeller means c~ompri~3e~ any appropriate number o:E c:oncentric anrlular f low path portion~, having a generally zig-zag configuration aE seen in radial cro~s-~ection.
The imp~ller means conveniently comprises f ir~t and econd co-operating set~3 of impeller blade~ or van~s which WO 93/04288 PCr/GB92/01~28 _ '~JL1~U~1 are pref erably con~ra-rotating, being rotated about the axi~
in opposite dires:tions in common, or by individually controllable drive meansO The unit o:E the invention can thus have a plurality of r:oncen~ric radially sp~ced drum or sleeve-like ~upp~rt~ for impeller bladeE; nr vane~;, the ~upport being rotatably driven in oppo~3ed directions ~ ancl guide means for re directing the fls:wi ng fluid through 180 or thereabc~ut between the f low path ~ectic)ns 0 The guide m~ans carl be integrated with the ~3upports ~;o as to rotate with the ~mpeller blades or can be stat ' ona~7, in which event they ca~ be part of the pump hou~ing.
Pump or compreæsor units of the invention c:an be employed to move liquids so as to have e~ entially only a pumping ac:tion, or ga~, or a m~xture o f liquid and ga~, f or ex~mple, in oil extraction appli~ation~; wh~re a mul~i-phase fluid has to be handled, when c:ompre~sion of the gas ~r the ga~eou~; componeg~t of the mixtur~ neces~arily ensue~.
~ he drive mearl~ f or contra-rotal:ing impeller means of the inventiun ~an compri~e ~eparate electric, hydraulic or pneumatic motor~; axially spaced with the imp~ller means betwe~n them. C108e coupled oil cooled electric motor~ can be u~;ed in a ~3ealed or " canlled " unit which i~ of ~pecial islter~3gt for in~tallations where 18akage8 to or from the unit can be critical ~ iEor example in ~ubsea in8tallations to prevellt water ingre~, and in top id~ applications to prevent puznp~d f lllid l~akag-e to the surrounding3 . A ~eparate high pre~;u:re ~eal chamber can be provided, 80 th~t a low~r pre~ure can be ~saintairled in the actual motor chamber.
~ he inv~ntio2l i~ further descrihed below, by way of example, with reference to the accompanying drawing6, in whi~::h like parts are indicat~d by like referenc:e slumerals and in which~
Figure 1 is a schematic sectional side view of a f irst pump or compr~ssor unit ~mbodying the invention;
WO 93/042~8 PCr/GB92/9)l528 Figure 2 is a liJce vi~w o~ a second pump or compr~s~or unit embodying the invention;
Figure 3 is a like vi~w of a third pump or compres~s~x unit embodying the invention; arad i?igure 3A is a f xagmentary view on a larger æcale illu~trating a sealing arrangement incorporated in the unit of Figure 3.
The pump or compre~sor unit illustrated in Figure 1 compri~;e~; a housing 1 of ge~erally c:ylindrical shape with a f luid inlet 2 and a f luid outlet 4 in resp~ctive oppo~ed end walls 5 and 6~, The end walls are annular and ~xterld round respective co-axial drive sh~fts 10 and 11~ aligned on an axis 12. 13ach ~haf~ is ro~atably driven by a re~pective ele~:tric motor ( not ~;how~ ), the drive 23haft~; having oppo~ d rotational directions. ~t their ~paced irmer end~;, the drive ~haft~ 10 and 11 mount respective rotor walls 14 aIld 15 at right angle~ to the axis 12.
The fluid irllet 2 i8 confititut~d by the housing end wall 5 and by an inwardly tapering fru~to-conical internal wall 7 haviIlg a short sleeve 9 whic:h i centr~d on the axi~ 12 and which ~oncenl;rically ~urrouIlds a ~hort sleeve 16 p:rojectillg outwardly fxom the rotor wall 14. Sealing means (~ot shown) operative be~wee~ ~he ~leeves 9 and 14 ~eals fluid entering the~unit through the luid inlet 2 from pre~suri~ed fluid in a worki~g chamber 20 within the hou~i~g 1, outwardly of the sl~eve 9. ~he chamber 20 i~ s~aled al~o by sealing mean~
op~ative between a sleeve 17 extendi~g inwardly from the end wall 6 and an outwardly extending sle~ve 19 on the rotor wall 15, the sleeve~ 17 and 19 being ~entred on the axis 12.
The fluid inlet 2 communicates freely with an inlet chamber 21 betw~en the two rotor walls 14,15 by way of apertures in the rotor wal~ 14 b~tween the drive shaft 10 and the ~leeve 16~
At it~ outer edge, the rotor wall 14 supports radially ... ..
WO 93/04288 PCr/~B92/01 ~ .L ;~
spaced inner and outer concentric sleeve~ 31 arld 32 which are connected together at ~he inlet end of ~he unit by an annular wall 34 of ~emi-circular radial c:ros~ ;ection. The rotor wall 15 c:arries at its outer end an int~rmedi~te ~leeve 35 received radially midway between the slee~és 31 and 32O
Annular rows of impeller vane~; or blades 36 and 37 proj ct towards eac:h other froIll the outer :;urface of the ~leeve 31 and from the inner su:rface of the sleeve 32. The blades 36 and 37 ar~3 received between and co-operate vane~; or blade~; 40 and 41 . The blades 3 6 ~nd 4 0 co operate to move f luid f rom the cha~er 21 axially towards the inlet end of the hou~ing and the blades 3 7 and 41 move the f luid again axially but in the c:ontrary directionO The pre~;suri~ed fluid thus enter~
the working chamber 20 f::om between the blades 37 and 41 and di~charge~ f rom the unit through the f luid outl~t 4 . The unit of ~igure 1 thu~; provides f s:~r ~wo axial c:oncent:cic f low path $ection~ but more such sections can be provided.
In the ~eco~d f orm of pump or compres or unit according to the inventi4n, shown in Figure 2, the hou~3ing 1 haf3 sleeve portian~ 51 and 52 extending outwardly of the hou~ing around the drive ~haf~s 10 and 11 and annular ~;eal means 54 and 55 between ~3ach driv~ shaft and the associated ~31eeve portion.
At the outer ~;ide o~ the outer impeller E31eeve 32, a seal 56 to the inner ~;urf ace of ~he ~3ide wall of the hou~ing i~
pro~J' ded, to ~3eparate the hou~ing interior into irllet aIld ostll3t chambers 57 arld 590 The rotor wall 14 ~upports ~he impeller lee-re 31 and 32, not dir~ctly D but by mearlE~ of an annlllar ritlg or ~et of impeller blade~ 610 The roto:r wall lS mount~ the interm~diate sleeYe 35 again indirectly; ~y means of an annular eIld wall 62 and the wall alæo mount~ an ann~l ar f3et of ~mpeller blades 64 arrarlged to eo-operate with l;he blades 61 to drive :Eluid entering the housing through the inlet axially in the direction towards the outlet 4. The wall 62 . ~ W0 93/04~X8 PCI'/GB92/01~28 w ~ O 1 c :3rresponds generally to the annular wall 34, being semi-circular in cross-section and functioning to reverse the direction of the f luid f lowing be~weerl the blades 61 and 64 whil~t diverting the flows radially outwardly t~ between the blade~ 3 6 and 4 0 .
The unit of Figu:re 2 thus functiorls generally ~i~Lilarly to that of Figure 1, bu~ provide~; f or axial pump or compre~or action on the incoming f luid in three concentric annular f low pas~;age sections instead of only two .
In the pump unit or compressor of the invention shown in Figure 3, the incoming f luid is moved axially in alternating directions along f our concentric axial paths, so that the inlet anL:l discharge direction:; are oppo~3ed, and radially ~p~ced s instead of being ali~ned, or substantially aligned, a~ in the unit~ of Figure~ 1 and 2. ~:
~ 50reover, wherea in the units of Figure~; 1 and 2, the f lowi:ng f luid is redirected f ;rom on~ axial f low path section to a~other by the axial guid~ means constituted by the aImular erld walls 34 and 62, which are secured to the blades to move with them , in ~igure 3, the guide m~3an~ are ~tationary and con~tituted part~; of the houæing of the unit.
Thu~, the hou~ g 1 i~ again approx~tely in the ~;hape of an axi~lly ~hort cylindrical dr~m, ~nd f luid inl~3t 2 and outlet 4 ~re both provided in the end wall 5, with the inlet ~pa~:~d radially inwardly of the outlet. Between the inlet arld the outlet, the housing 1 inc:ludes an annular wall poxtîon 71 which i8 approximately ~3smi--circular in radial crs:~s-~ection. The other end wall 6 îs formed with an inner or an outer arlnular end wall portion 72 and 74 of ;imilar, oppo~ed " ~hapes, with the wall portisn 71 radially midway be1;ween th~m.
Ths~ contra-xo~ating ~peller m~ans of the unit of Figure 3 comprise innermo~t axially adjacent annular rows or sets of blade~ 75 and 76 ~3xtending outwardly f:rom the rotor wall~ 14 WOs3/04288 PCT/GB92/0152 and 15 respectively ~o surrounding rings 77 and 79, from which extend a ~econd adjacent pair of sets of blade~ 75a and 76a themselves surrounded by ring~ 77a and 79a. Third sets of impeller blades 75b,7Sb ~uxround thP se~ond ~et~ and fourth ~e~s 75c,76b surround the third. Each impeller assembly, comprising foux concen~ric annular rows or ~ets of blades, ends at its outer periphery with a re~pective outer ring 77c,79c at the inner surface of the side wall of the housing.
Each axially adjacent pair of contra-rotating blade sets is arranged to move fluid axially but in direction~ which alternate from one pair to the radially adjacent pair. Thus the blades 75 and 76 co-operate to urge fluid entering at the inlet 2 in the direction of the arrow. The flow i~ then turned in the oppo~ite direction by ~he end wall portion 72 ~o a~ to be moved in ~he con~rary axial direction by the radially adjacent pair of blade set 75a,76b. ~he pressurised fluid flow i~ then turned again by the housing wall portion 71 back to it3 original i~let direction through the next set of blade~ 75b,76b and is finally turned once again by th wall portion 74 to be di~charyed from the hou~ing through the outlet 4 after pas~age through the fourth and outermo~t ~et of blades 75c 7 76c.
Each of the outer concentri~ annular fluid flow path ~ection~, co~tai~ing ~he axially adjacent aontra-rotating ~et~ of blades, ha~ to be ~ealed against fluid flow radially to the inwardly adjacent fluid flow path aection which i~ at a lower pre~sure. A suitabl~ ~ealing arra~gement "A", between the adjacent edge~ of the third pair of ring~ 77b,79b is shown i~ Figure 3A and compri~es interfitting s~al elements 80 and 81 extending axially from the adjacent edges o f the ring~, the ~e ling element~ being provided with interfltting configurations, here in the form of a triangular section ridge and groove.
~W093/04288 ~ ; ; PCT/GB92/0l~28 ` ~ `i` 6301 , , '.
~ he rings must be sealed also to the housing wall portions and sLmilar or other suitable ~eals are provided at appropriake positions in all the illustrated pump units of the invention. In this connection, reference may. be made to the ealing arrang ments described in WO 91/04417 and illu~trated in Figures la and lb of that document which is incorporated herein by reference.
The three pump units embodying the invention illustrated and described abo~e can be modified in variou5 ways within the scope of the inv~ntion. For example, the 1OW paths b~tween the inlets 2 and outle~s 4 can be of decreasing cros~-section in the flow direction, where the fluid is substantially compressed during its pas~age through the unit.
The fluid inlets and outlet~ can be differen~ly located in the housing walls, for example, and the flow direction can be radially inwards in~ead of outward~. Thu~, the inlet 2 of the unit of Figure 3 can be radially outwardly of the ou~let 4 instead of as ~hownO The invention can thu~ be embodied in a variety of way~ other than as specifically de~cribed.
~`:
Claims (12)
1. A pump or compressor unit comprising a housing (1) having therein a plurality of sleeve members (31,32,35) rotatable about a common axis, a first drive shaft (10) mounting at least one of the sleeve members for rotation in one direction, and a second drive shaft (11) mounting at least one other of the sleeve members being spaced apart radially of the axis and carrying impeller blades (36,37,40,41,61,64) arranged to move a fluid along at least one path between the sleeve members, characterised by seals (54,55) between the housing (1) and each drive shaft (10,11) and a seal (56) between the housing and the outermost sleeve (32), the seals dividing the housing interior into an inlet chamber (57) and an outlet chamber (59) for the fluid.
2. A pump or compressor unit as claimed in claim 1 wherein the plurality of sleeve members provides a plurality of fluid flow paths, the impeller blades being arranged to move the fluid in the same direction in the innermost and the outermost of the flow paths.
3. A pump or compressor unit comprising a housing (1) having therein an inner sleeve member (31) rotatably drivable in a first direction about the axis of the sleeve, an intermediate sleeve member (35) around the inner sleeve member and rotatably drivable about the axis in the direction opposite the first direction, an outer sleeve member (32) around the intermediate sleeve member and connected to the inner sleeve member to rotate therewith, impeller blades (36,37,40,41) carried by the sleeve members to rotate therewith, the impeller blades being arranged to move a fluid along an inner and an outer path located between the inner and intermediate sleeves and between the intermediate and outer sleeves respectively, the inner and outer and outer paths overlapping at least partially in the direction of the axis, characterised in that the blades (36,37,40,41) are arranged to move the fluid along the paths in contrary directions and that the outer sleeve (32) is connected to the inner sleeve (31) by guide means (34) directing fluid moving along one of the inner and outer paths into the other of the inner and outer paths.
4. A pump or compressor unit as claimed in claim 3 having axially aligned sleeve portions within the inner sleeve member (81), the inner sleeve member being connected to one sleeve portion for rotation therewith by impeller blade means (61) and the intermediate sleeve member (35) being connected to the other of the sleeve portions by a second guide means (62) directing fluid flowing between the sleeve portions and the inner sleeve member to between the inner and intermediate sleeve members.
5. A pump or compressor unit as claimed in claim 4 wherein the other of the sleeve portions carries impeller blade means (64) operative between the other sleeve portion and the inner sleeve.
6. A pump or compressor unit as claimed in claim 3, 4 or 5 wherein the inner sleeve and the intermediate sleeve members are connected to respective drive shifts (10,11) by radially extending walls (14,15), at least one of the walls having an aperture therethrough, and wherein seals between the housing (1) and the walls (14,15) define an inlet or outlet chamber between the walls communicating outwardly of the housing through the apertured wall.
7. A pump or compressor unit as claimed in claim 3, 4 or 5 wherein the inner (31) and intermediate sleeve members (35) are connected to respective drive shafts (10,11) and wherein seals (54,55) between the housing and each drive shaft and a seal (56) between the housing and the outer sleeve member (32) divide the housing interior into an inlet chamber (57) and an outlet chamber (59) for the fluid,.
8. A pump or compressor unit as claimed in claim 3, 4, 5, 6 or 7 wherein the housing (1) comprises a tubular wall around the sleeve members and generally radially extending side walls (5,6), the side walls having therein a fluid inlet (2) and a fluid outlet (4) in substantial alignment in the direction of the axis.
9. A pump or compressor unit comprising a housing (1) containing drive shafts (10,11) aligned along an axis and carrying respective impeller assemblies, the drive shafts being rotatably drivable in contrary directions, characterised in that the impeller assemblies are carried at adjacent ends of the drive shaft and that each assembly comprises a plurality of radially spaced coaxial ring members (79-79b) having impeller blades (75,76,75a,76a etc.) extending between them, the ring members defining coaxial annular fluid flow paths and the impeller blades being arranged to move a fluid along each path in a direction opposed to that of the or each adjacent path, guide means (72,74) for guiding the fluid on each path into the adjacent path, and seals (80,81) between the adjacent edges of the ring members.
10. A pump or compressor unit as claimed in claim 9 wherein the seals comprise interfitting seal elements (80,81) carried by respective ring members.
11. A pump or compressor unit as claimed in claim 9 or 10 wherein the seal elements (80,81) have interfitting ridge and groove configurations.
12. A pump or compressor unit as claimed in claim 9, 10, or 11 wherein the guide means (72,74) are constituted by the housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9117859.0 | 1991-08-19 | ||
| GB919117859A GB9117859D0 (en) | 1991-08-19 | 1991-08-19 | Pump or compressor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2116001A1 true CA2116001A1 (en) | 1993-03-04 |
Family
ID=10700189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2116001 Abandoned CA2116001A1 (en) | 1991-08-19 | 1992-08-19 | Pump or compressor unit |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0600954A1 (en) |
| AU (1) | AU2434392A (en) |
| BR (1) | BR9206382A (en) |
| CA (1) | CA2116001A1 (en) |
| GB (1) | GB9117859D0 (en) |
| WO (1) | WO1993004288A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2309745A (en) * | 1996-02-02 | 1997-08-06 | John Peter Miller | Multi-stage compressor |
| WO2001050024A1 (en) | 1999-12-31 | 2001-07-12 | Shell Internationale Research Maatschappij B.V. | Method and system for optimizing the performance of a rotodynamic multi-phase flow booster |
| US8356469B1 (en) | 2007-04-05 | 2013-01-22 | The United States Of America As Represented By The Secretary Of The Air Force | Gas turbine engine with dual compression rotor |
| HUP1000286A2 (en) * | 2010-06-02 | 2011-12-28 | Mayex Canada Kft | Dispensing unit and method for dispensing a liquid under pressure |
| US9476427B2 (en) * | 2012-11-28 | 2016-10-25 | Framo Engineering As | Contra rotating wet gas compressor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2234733A (en) * | 1937-07-07 | 1941-03-11 | Jendrassik George | Compressor or pump of the rotary blades type |
| GB586560A (en) * | 1942-01-21 | 1947-03-24 | Joseph Stanley Hall | Improvements in axial flow compressors and like machines |
| US2458037A (en) * | 1946-08-01 | 1949-01-04 | Continental Aviat & Engineerin | Fluid energy machine |
| FR971613A (en) * | 1948-09-14 | 1951-01-19 | Axial flow generator or receiver turbomachine | |
| GB8507010D0 (en) * | 1985-03-19 | 1985-04-24 | Framo Dev Ltd | Compressor unit |
| CH678352A5 (en) * | 1988-06-23 | 1991-08-30 | Sulzer Ag | |
| GB8921071D0 (en) * | 1989-09-18 | 1989-11-01 | Framo Dev Ltd | Pump or compressor unit |
-
1991
- 1991-08-19 GB GB919117859A patent/GB9117859D0/en active Pending
-
1992
- 1992-08-19 AU AU24343/92A patent/AU2434392A/en not_active Abandoned
- 1992-08-19 WO PCT/GB1992/001528 patent/WO1993004288A1/en not_active Application Discontinuation
- 1992-08-19 EP EP92917484A patent/EP0600954A1/en not_active Withdrawn
- 1992-08-19 CA CA 2116001 patent/CA2116001A1/en not_active Abandoned
- 1992-08-19 BR BR9206382A patent/BR9206382A/en active Search and Examination
Also Published As
| Publication number | Publication date |
|---|---|
| EP0600954A1 (en) | 1994-06-15 |
| GB9117859D0 (en) | 1991-10-09 |
| AU2434392A (en) | 1993-03-16 |
| WO1993004288A1 (en) | 1993-03-04 |
| BR9206382A (en) | 1995-04-04 |
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| Date | Code | Title | Description |
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| FZDE | Dead |