SE180497C1

SE180497C1 -

Info

Publication number: SE180497C1
Authority: SE
Publication date: 1962-01-01

Description

Uppfinnare: C E Adams och Y H Sun Foreliggande uppfinning hanfor sig till en vatskepump eller -motor, yid Aiken roterande vingar eller skivkolvar aro anordnade att pressas utat pa hydraulisk vdg, och vilken innefattar ett hus med en rotorkammare och oppningar for lagtryck resp. hogtryck samt en rotor, vilken dr roterbart lagrad i huset och dr sã anordnad i forhallande till rotorkammarens omkretsvagg, att en vatskeoverfOringssektion bildas mellan hogtrycksoppningen och lagtrycksappningen, vilken rotor dr forsedd med i huvudsak radiellt ordnade spalter, i vilka vingarna aro radiellt r8rliga tram och ater oberoende av varandra, varvid varje vinge har pa sin ytterande, raknat i radiell led, ett tatningsorgan, som är anordnat att anligga mot rotorkammarens omkretsvagg och vilka vingar ha inre och yttre ytor, som paverkas av det hydrauliska mediet far att astadkomma att varandra motsatt riktade tryckkrafter radiellt tillforas vingen, varjamte vingens innerande dr paverkbar ay yatsketryck fran hogtrycksoppningen. Inventors: C E Adams and Y H Sun The present invention relates to a hydraulic pump or motor, in which rotating blades or disc pistons are arranged to be pressed out on hydraulic wall, and which comprises a housing with a rotor chamber and openings for actuating pressure resp. high pressure and a rotor which is rotatably mounted in the housing and arranged so as to relate to the circumferential wall of the rotor chamber that a liquid transfer section is formed between the high pressure opening and the low pressure opening, which rotor is provided with substantially radially arranged gaps in which the wings are radially independently of each other, each wing having, on its outer side, shaved in radial direction, a sealing member which is arranged to abut against the circumferential wall of the rotor chamber and which wings have inner and outer surfaces which are affected by the hydraulic medium to cause oppositely directed compressive forces are radially applied to the wing, and the inner part of the wing can be actuated by yat pressure from the high-pressure opening.

Andamalet med uppfinningen är att astadkomma en med vingar forsedd pump, som är sarskilt lamplig att anvandas vid h8ga vatsketryck, varvid pumpen dr forsedd med organ, som med lagt tryck skola pressa vingarna i anliggning mot delar av pumphuset pa sadant satt, att vingarna icke komma att bringas i anliggning mot huset i sadan grad att de skada huset, men att de komma att anligga mot detsamma med tillracklig kraft for att forhindra att ett under try& varande flytande medium lacker fran vingarnas ena sida till deras andra sida. The object of the invention is to provide a pump provided with wings, which is particularly suitable for use at high water pressures, the pump being provided with means which, with applied pressure, are to press the wings in abutment against parts of the pump housing in such a way that the wings do not come to be brought into abutment against the house to such an extent that they damage the house, but that they come to abut against the same with sufficient force to prevent a pressurized liquid medium from varnishing from one side of the wings to their other side.

Det for uppfinningen utmarkande Or, att for oyerforing av en uta.triktad kraft pa vingens inre andyta dr en med mycket mindre tvarsektion an vingen utford del anordnad, vilken del ligger mellan vingen och en for hogtrycket avsedd kanal och salunda utsattes for hogtrycket, sa att den vingen paverkande kraften i riktning utat blir endast en brakdel av den kraft, som skulle paverka vingen, om hela dennas hire andyta yore utsatt for hogtrycket. The object of the invention is that in order to exert a directed force on the inner surface of the wing a part with a much smaller transverse section on the wing is arranged, which part lies between the wing and a channel intended for high pressure and is thus exposed to high pressure, so that the force acting on the wing in the outward direction becomes only a fraction of the force which would affect the wing, if its entire hire surface is exposed to the high pressure.

Uppfinningen beskrives i detalj i det foljande under hanvisning till bifogade ritning, som visar en lamplig utforingsform ay uppfinningen. The invention is described in detail in the following with reference to the accompanying drawing, which shows a suitable embodiment of the invention.

Pa ritningen visar fig. 1 ett langsghende vertikalsnitt av en enligt fOreliggande uppfinning utford pump for ett flytande medium. Fig. 2 och 3 aro tvargaende horisontalvyer i de plan, som i fig. 1 Oro betecknade med linjernaresp.Fig. 4 Or en detalj ay ett tvarsnitt genom pumpen och rotorn och askadliggor konstruktionen av vingarna och kolvtapparna i pumpen. In the drawing, Fig. 1 shows a longitudinal vertical section of a pump for a liquid medium according to the present invention. Figs. 2 and 3 are horizontal horizontal views in the planes, which in Fig. 1 are indicated by linear response. 4 Make a detail in a cross section through the pump and the rotor and ash the construction of the wings and piston pins in the pump.

Pa ritningen Or pumpen forsedd med huvudbeteckningen 20. Denna pump innefattar ett hus med anddelarna 21 och 22 och en mellandel eller kamdel 23. Genom sistnamnda del stracker sig en oppning 24, vilken bildar en rotorkammare, nar delarna 21, 22 och 23 Oro hopmonterade. Vid fOreliggande utforingsform anvandes en obalanserad pump och dess oppning 24 Or i huvudsak cirkuldr, ehuru oppningens omkretsvagg innehdller tva delar 25 och 26, vilka Oro bagformiga och ha olika radier, raknat Iran pumpaxelns 27 rotationsaxel. De hada vaggdelarna 25 och 26 Oro inbordes forbundna medelst bagformiga vaggdelar, som ha lika radier raknat frail en mittpunkt, som lake sammanfaller med axelns 27 rotationsaxel. In the drawing Or the pump is provided with the main designation 20. This pump comprises a housing with the end parts 21 and 22 and an intermediate part or cam part 23. An opening 24 extends through the latter part, which forms a rotor chamber when the parts 21, 22 and 23 are assembled. In the present embodiment, an unbalanced pump and its opening 24 Or are used essentially circular, although the circumferential cradle of the opening contains two parts 25 and 26, which are rear-shaped and have different radii, shaved off the axis of rotation of the pump shaft 27. The had rocker parts 25 and 26 Aro are inboard connected by means of bag-shaped rocker parts, which have equal radii shaved frail a center point, which lake coincides with the axis of rotation of the shaft 27.

Husdelarna 21 och 22 aro forsedda med nallager 28 och 30, medelst vilka axeln 27 roterbart uppbares i huset. Husdelen 21 liar for axeln en oppning, som stracker sig helt igenom husdelen 21, sa att axelanden kan stracka sig utanf8r huset for att dar f8rses med en remskiva, en koppling eller en annan godtycklig anordning for overforing ay rotationsr8- relse Iran en drivanordning till pumpen. Husdelen 21 Or forsedd med ett tatningsorgan 31, som omger axeln intill axeloppningens ytter- 2-- — ande. Mellan detta tatningsorgan och rullagret i husdelen 21 fir huset forsett med en ringformig urtagning 32 for uppsamling av den del ay det flytande mediet, som kan komma att flyta langs axeln eller sippra in mellan ett tatningsorgan 33 och axeln eller huset. En kanal 34 stracker sig fran urtagningen 32 till en annan urtagning 35, som är bildad i den yta av husdelen 21, som anligger mot mellandelen 23. The housing parts 21 and 22 are provided with tapered bearings 28 and 30, by means of which the shaft 27 is rotatably supported in the housing. The housing part 21 has for the shaft an opening which extends completely through the housing part 21, so that the shaft ends can extend outside the housing to be provided there with a pulley, a coupling or any other device for transmitting the rotary movement Iran a drive device for the pump . The housing part 21 Or is provided with a sealing member 31, which surrounds the shaft next to the outer end of the shaft opening. Between this sealing member and the roller bearing in the housing part 21 the housing is provided with an annular recess 32 for collecting the part ay of the liquid medium which may flow along the shaft or seep in between a sealing member 33 and the shaft or housing. A channel 34 extends from the recess 32 to another recess 35, which is formed in the surface of the housing part 21, which abuts against the intermediate part 23.

Ett andra tatningsorgan 33 ãr anordnat i husdelen 22 fOr att ocksa innesluta en del av det flytande mediet kring nallagret 28 och utrymmet kring rotorns axel och mittdel. Husdelen 22 ar forsedd med en urtagning 36, i vii-ken axelns 27 innerande stracker sig. Denna urtagning fir medelst en kanal 37 aven forbunden med en inlopps8ppning 38, som är bildad i husdelen 22, varvid inloppsoppningen 38 liar en gangad inloppsdel 40, till vilken ett flytande medium fares fran en reservoar eller flagon annan godtycklig lamplig kalla, nar pumpen fir i drift. Husdelen 22 har en andra oppning 41, som utgor utloppsoppning och som Or gfingad lid sin ytterande 42 for att kunna kopplas till ett ror, som leder till anvandningsstallet f5r det flytande medium som avges av pumpen. Det hOr observeras att inloppsoppningen tjanstgor som hogtrycksoppning och utloppsoppningen som lagtrycksOppning i det fallet, att anordningen arbetar sasom motor. Vidare kommer utloppsoppningen da anordningen arbetar sasom pump att vara inloppsoppning dh anordningen arbetar shsom motor. A second sealing member 33 is provided in the housing part 22 for also enclosing a part of the liquid medium around the teddy bear bearing 28 and the space around the shaft and middle part of the rotor. The housing part 22 is provided with a recess 36, in which the interior of the shaft 27 extends. This recess is provided by means of a channel 37 also connected to an inlet opening 38, which is formed in the housing part 22, the inlet opening 38 being a passage inlet part 40, to which a liquid medium is passed from a reservoir or flake other arbitrary suitable cold, when the pump is in Operation. The housing part 22 has a second opening 41, which forms an outlet opening and which is connected to its outer 42 in order to be able to be connected to a pipe, which leads to the use stable for the liquid medium delivered by the pump. It is observed that the inlet port serves as a high pressure port and the outlet port as a low pressure port in the case that the device operates as an engine. Furthermore, the outlet opening when the device operates as a pump will be an inlet opening, ie the device operates as a motor.

Husdelen 21 Or forsedd med en urtagning 43, som Jigger mitt for oppningen 41, varvid urtagningen och oppningen sta i forbindelse med varandra medelst hal 44 i mellandelen 23. Urtagningen 35 och oppningen 38 Oro ocksh anordnade mitt for varandra och sth i forbindelse med varandra medelst liknande hal 44 i mellandelen 23. Urtagningarna 35 och 43 Oro anordnade fOr att det flytande mediet vid pumpens drift oforhindrat skall kunna na oyerforingsfickor 45 for det flytande mediet, vilka fickor bildas dels av husvaggarna, dels av yttervaggen 46 i en rotor 47 och dels av vingar eller sklykolvar 48, vilka aro uppburna ay rotorn och Oro anordnade att bringas i anliggning mot husvaggarna. The housing part 21 Or is provided with a recess 43, which jigger in the middle of the opening 41, the recess and the opening being connected to each other by means of hall 44 in the intermediate part 23. The recess 35 and the opening 38 are also arranged opposite each other and stand in connection with each other by similar recesses 44 in the intermediate part 23. The recesses 35 and 43 are arranged so that the liquid medium during the operation of the pump can unhindered reach overfeeding pockets 45 for the liquid medium, which pockets are formed partly by the housing cradles, partly by the outer cradle 46 in a rotor 47 and partly by wings or mud pistons 48, which are supported on the rotor and Oro arranged to be brought into abutment against the house cradles.

Rotorn 47 Or vid 50 fastkilad ph axeln 27 for rotation med densamma och rotorn Or anbragt i oppningen eller rotorkammaren i mellandelen 23. Vingarna 48 Oro sa breda att de blott ha ett litet spelrum med husdelarnas 21 och 22 angransande andytor. Vingarna maste bilda en glidande tatning med husdelarnas andytor. Vid den visade utforingsformen Oro vingarna relativt tjocka och Oro V-formade urtagningar bildade i sidokanterna och ytteranden. Dessa V-formade urtagningar ge upphov till pa avstand frail varandra belagna tatningskanter 1 anligg ning mot rotorkammarens omkretsvagg och med namnda kaminares sidovaggar, varvid de p0 avstand fran varandra belagna tatningskanterna bilda en kam.mare yid vane vinges ytterande. Sistnamnda kammare Oro via urtagningarna i vingarnas sidokanter forbundna med innerandarna av de spalter, vilka Oro bildade i rotorn 47 for att mottaga vingarna. Dessa spalter Oro mycket noggrant utformade, varfor en tat glidpassning kommer att forefinnas mellan vingarna och rotorn. Genom att utrymmena vid vingarnas inner- och ytterfindar sammankopplas, komma vingarna att vara i huvudsak tryckbalanserade, dys. trycken ay de flytande medierna vid inneroch ytterandarna komma att -vara lika och komma att tillforas vingandytor, vilka ocksa. Oro i huvudsak lika. Nar pumpen f8r det flytande mediet salunda vid drift utsattes for tryck fran det flytande mediet komma namnda tryck icke att strava att pressa vingarna i nagondera riktningen. The rotor 47 Or at 50 is wedged ph the axis 27 for rotation therewith and the rotor Or arranged in the opening or the rotor chamber in the intermediate part 23. The wings 48 are so wide that they have only a small clearance with the adjacent surfaces of the housing parts 21 and 22. The wings had to form a sliding seal with the front surfaces of the housing parts. In the embodiment shown, the Oro wings are relatively thick and the Oro V-shaped recesses are formed in the side edges and outer edges. These V-shaped recesses give rise to spaced sealing edges abutting against the circumferential cradle of the rotor chamber and with the side walls of said chambers, the sealing edges coated at a distance from each other forming the outer chamber of the chamber. The latter chamber Oro via the recesses in the side edges of the wings connected to the inner ends of the gaps, which Oro formed in the rotor 47 to receive the wings. These columns are very carefully designed, so that a tat sliding fit will be present between the wings and the rotor. By connecting the spaces at the inner and outer fins of the wings, the wings will be mainly pressure-balanced, nozzle. the pressures ay the liquid media at the inner and outer ends will be -equal and will be supplied to wing surfaces, which also. Concerns essentially the same. When the pump for the liquid medium is thus during operation exposed to pressure from the liquid medium, said pressure will not try to press the wings in any direction.

Sasom framgar av fig. 1 och 3 aro i husdelarnas 21 och 22 andytor bagformiga urtagningar anordnade mitt for innerandarna av vingspalterna i rotorn. Dessa urtagningar, 51 och 52, Oro belagna intill och mitt for inloppsoppningen 38 resp. utloppsoppningen 41 och de stracka sig Over samma vridningsvinkel som namnda oppningar. Urtagningen 51 Or f5rbunden med inlopps5ppningen via slitsar 53 medan urtagningen 52 Or forbunden med utloppsoppningen 41 via en slits 54. Urtagningarna 51 och 52 komma att mottaga det flytande mediet Yid de tryck, som rada i de angransande oppningarna. Vingspalternas och vingarnas innerandar komma salunda att utsiittas for samma tryck som darns ytterandar nar vingspalterna ligga mitt for inloppsoch utloppsoppningarna. Husdelarna 21 och 22 Oro vidare fOrsedda med spar 55, som skola fora det flytande mediet under det tryck, som rader i utloppsoppningen, till oppningarna for axeln och nallagren. Detta tryck fores genom ett spar 56 fran rotorns ena Linde till den andra, varvid sparet 56 star i forbindelse med ett ringformigt spar 57 i vaggen i rotorns mittoppning. Sparet 57 Or anordnat att leda mediet under tryck till innerandarna av kolvkamrar, vilka Oro bildade i rotorn 47. Dessa kolvkamrar stracka sig radiellt fran sparet 57 till yingspalternas innerandar och innehalla forskjutbara kolvtappar 60, vilka ha till uppgift att stota emot och pressa vingarna med liten kraft I riktning mot rotorkammarens omkretsvagg. I den visade utforingsformen liar varje yinge en enda kolvtapp. Det torde vara tydligt att flera kolvtappar skulle kunna utnyttjas om sh onskas samt att holytapparnas diametrar skulle kunna yarieras i forhallande till den visade diametern, nar en stone eller mindre kraft fordras for att pressa vingarna i riktning utht. De i utforingsexemplet visade kolvtapparnas diametrar Oro — —3 mindre an vingtjockleken. Dessa diametrar ha valts sa, att en kraft, som her beraknats ge onskad verkan, skall erhallas. Kolvtapparnas storlek kan andras om en stone eller mindre kraft erfordras for att vingarna skola kvarhallas i tatande anliggning mot rotorkammarens omkretsvagg. As can be seen from Figs. 1 and 3, in the end faces of the housing parts 21 and 22, rear-shaped recesses are arranged opposite the inner ends of the wing slots in the rotor. These recesses, 51 and 52, are located adjacent to and opposite the inlet opening 38 and 38, respectively. the outlet opening 41 and they extend over the same angle of rotation as said openings. The recess 51 is connected to the inlet opening via slots 53 while the recess 52 is connected to the outlet opening 41 via a slot 54. The recesses 51 and 52 will receive the liquid medium Yid the pressures which line up in the adjacent openings. The inner ends of the wing gaps and wings will thus be subjected to the same pressure as the outer ends of the wings when the wing gaps are opposite the inlet and outlet openings. The housing parts 21 and 22 are further provided with grooves 55, which are to carry the liquid medium under the pressure, as rows in the outlet opening, to the openings for the shaft and the teddy bear bearings. This pressure is passed through a recess 56 from one Linde of the rotor to the other, the recess 56 being in communication with an annular recess 57 in the cradle in the central opening of the rotor. The recess 57 Or is arranged to guide the medium under pressure to the inner ends of piston chambers, which Oro formed in the rotor 47. These piston chambers extend radially from the recess 57 to the inner ends of the ying gaps and contain displaceable piston pins 60, which have the function of abutting and pressing the wings with small force In the direction of the circumferential wall of the rotor chamber. In the embodiment shown, each yinge liar a single piston pin. It should be clear that several piston pins could be used if desired and that the diameters of the cavity pins could be varied in relation to the diameter shown, when a stone or less force is required to press the wings in the direction of. The diameters of the piston pins shown in the exemplary embodiment are less than the wing thickness. These diameters have been chosen so that a force which has been calculated to give the desired effect must be obtained. The size of the piston pins can be changed if a stone or less force is required for the wings to be retained in abutting abutment against the circumferential wall of the rotor chamber.

Sasom oven har papekats aro omkretsvaggens delar 25 och 26 bagformiga med sina centra i axelns 27 rotationsaxel. Vingarnas tatningskanter komma salunda hada att bringas i anliggning mot omkretsvaggen vid dessa punkter och forhindra eller nedbringa till ett minimum lackningen av det flytande mediets tryck frail vingens ena side till den andra. Det torde vara tydligt att nar vingarna ligga intill inlopps- och utloppsoppningarna komma nam_nda oppningars tryck att rada pa bade sidor om vingarna avensom Mom urtagningarna mellan vingens tatningskanter. Detta tryck kommer ocksii att facia i vingspalterna vid vingarnas innerandar eftersom dessa spalter ligga mitt for de urtagningar, som aro forbundna med inlopps- och utloppsoppningarna, och urtagningarna vid vingarnas ytterandar ocksa aro farbundna med vingspalternas innerandar via urtagningar i vingarnas andar. Alltefter som vingarna rora sig forbi de tatande delarna 25 och 26 kan trycket 1 utrymmet mellan vingarnas tatningskanter variera, beroende pa en lackning av det flytande mediet tvars Over tatningskanterna. Om detta tryck varierar komma ocksa trycken vid vingarnas innerandar aft variera, beroende pa sammankopplingen av vingarnas inner- och ytterandar genom de urtagningar, som aro bildade i deras sidokanter. As above, the parts 25 and 26 of the circumferential cradle are rear-shaped with their centers in the axis of rotation of the shaft 27. The sealing edges of the wings will thus have to be brought into abutment against the circumferential cradle at these points and prevent or reduce to a minimum the varnishing of the pressure of the liquid medium from one side of the wing to the other. It should be clear that when the wings lie next to the inlet and outlet openings, the pressure of the said openings will line up on both sides of the wings, except for the recesses between the sealing edges of the wing. This pressure will also occur in the wing gaps at the inner ends of the wings because these gaps are opposite the recesses connected to the inlet and outlet openings, and the recesses at the outer ends of the wings are also connected to the inner ends of the wing gaps via recesses in the spirits of the wings. As the wings move past the sealing portions 25 and 26, the pressure in the space between the sealing edges of the wings may vary, depending on a varnishing of the liquid medium across the sealing edges. If this pressure varies, the pressures at the inner ends of the wings will also vary, depending on the interconnection of the inner and outer ends of the wings through the recesses formed in their side edges.

De mot varandra liggande ytorna av husdelarna 21 och 22 och mellandelen 23 aro forsedda med ringformiga spar for tatande packningar 62. Dessa packningar hoptryekas i de Mande sparen och tjana till att forhindra att det flytande mediet lacker ut mellan husdelarna. Husdelarna aro sammanhallna me-deist fastorgan 61, som stracka sig genom mitt for varandra liggande hal i husdelarna. The abutting surfaces of the housing parts 21 and 22 and the intermediate part 23 are provided with annular grooves for gripping gaskets 62. These gaskets are compressed in the Mande grooves and serve to prevent the liquid medium from leaching out between the housing parts. The housing parts are held together by fixed members 61, which extend through the opposite hall in the housing parts.

Da anordningen arbetar sasom en enhet roterar rotorn i moturs riktning enligt fig. 2. When the device operates as a unit, the rotor rotates in the counterclockwise direction according to Fig. 2.

Overforingsfickorna 45 for det flytande me- diet bli storre under rorelse i rotorkammarens undre halft, beroende pa oppningens 24 ex- centricitet i forhallande till rotorn 46, och det flytande mediet suges genom inloppsoppningen in i overforingsfickorna 45. Rotorns fortsatta rotation medfor att det flytande me- diet i overforingsfickorna fores forbi omkretsvaggens tatande del 25 och att overforings- fickorna bringas mitt for utloppsoppningen 41 resp. urtagningen 43. Alltefter som overforingsfickorna fortsatta att rora sig, minskar deras storlek beroende pa det excentriska in-hordes forhallandet mellan rotorn och kammaren, varfOr det flytande mediet utdrives ur OverfOringsfickorna och in i utloppsoppning- en. Eftersom denna Oppning via slitsen 54, urtagningen 52 och sparet 55 Sr forbunden med utrymmet omkring axeln, kommer samma tryck som i utloppsOppningen att rada i utrymmet omkring axeln, varjamte detta tryck via sparen 56 och 57 kommer aft palaggas alla kolvtapparnas 60 innerandar. The transfer pockets 45 for the liquid medium become larger during movement in the lower half of the rotor chamber, depending on the eccentricity of the opening 24 relative to the rotor 46, and the liquid medium is sucked through the inlet opening into the transfer pockets 45. The continued rotation of the rotor - diet in the transfer pockets is passed past the circumferential part 25 of the circumferential cradle and that the transfer pockets are brought in the middle of the outlet opening 41 resp. the recess 43. As the transfer pockets continue to move, their size decreases due to the eccentric obstruction between the rotor and the chamber, whereby the liquid medium is expelled from the transfer pockets and into the outlet opening. Since this opening via the slot 54, the recess 52 and the recess 55 is connected to the space around the shaft, the same pressure as in the outlet opening will line the space around the shaft, and this pressure via the grooves 56 and 57 will be applied to all inner ends of the piston pins 60.

Nar anordningen Sr i drift komma kolvtapparna 60 att pressas radiellt utat av det flytande mediet under tryck, medan vingarna 48 genomlopa kamringen eller oppningen 24 (i moturs riktning sasom framgar av fig. 2) mellan de lagen, som motsvara klockan 10 och klockan 2 pa en urtavla och nar vingarna riira sig forbi de lagen, som motsvara klockan 2 och klockan 10, och forbi utloppsoppningen 11, komma de att pressas utat enbart av sin egen och kolvtapparnas 60 centrifugalkraft. Nar kolvtapparna 60 hydrauliskt pressas utat komma de att overfOra del flytande mediets tryckkraft till vingarna och att astadkomma att de pa avstand frau varandra belagna tatningskanterna vid vingarnas ytterandar bring-as till fast anliggning mot rotorkammarens omkretsvagg. Eftersom trycken av det flytande mediet vid vingarnas inner- och ytterandar alltid Oro i huvudsak balanserade, komma de frau kolvtapparna harrOrande krafterna att forutom eentrifugalkraften vara de enda krafter, som utnyttjas for att pressa vingarna i riktning utat. Genom begransning av kolvtapparnas storlek kan ocksa deras kraft begransas. Eftersom den kraft, som presser vingarna i anliggning mot kamvaggen sálun- da begransas, kan pumptrycket Ras till stora varden utan att pumpen lager skada. When the device Sr is in operation, the piston pins 60 will be pressed radially outwards by the liquid medium under pressure, while the wings 48 pass through the cam ring or opening 24 (in the counterclockwise direction as shown in Fig. 2) between the layers corresponding to 10 o'clock and 2 o'clock pa a dial and when the wings move past the layers corresponding to the clock 2 and 10, and past the outlet opening 11, they will be pressed outwards only by their own and the centrifugal force of the piston pins 60. When the piston pins 60 are hydraulically pressed outwards, they will transfer some of the pressure force of the liquid medium to the wings and to cause the sealing edges coated at a distance from each other to be brought to a fixed abutment against the circumferential wall of the rotor chamber. Since the pressures of the liquid medium at the inner and outer ends of the wings are always substantially balanced, the female piston pins having the forces that, in addition to the centrifugal force, are the only forces used to push the wings in the outward direction. By limiting the size of the piston pins, their force can also be limited. Since the force which presses the wings in abutment against the camshaft is thus limited, the pump pressure can be reduced to a large value without the pump causing damage.

Claims

Patent claim:

Hydraulic pump or motor, in which rotating blades or disc pistons are arranged to be pressed outwards on a hydraulic wave, and which comprises a housing with a rotor chamber and openings for actuating pressure resp. high pressure and a rotor, which Sr is rotatably mounted in the housing and Sr so arranged in relation to the circumferential wall of the rotor chamber, that a liquid transfer section is formed between the high pressure opening and the low pressure opening, which rotor Sr is provided with substantially radially arranged gaps in and again independently, the vane wing having on its outer, shaved in radial direction, a sealing member which is arranged to abut against the circumferential wall of the rotor chamber and which vulvae have inner and outer surfaces which are influenced by the hydraulic medium to effect each other. oppositely directed compressive forces are radially applied to the wing, and the inner part of the wing can be influenced by liquid pressure from the high-pressure opening, characterized in that for transmitting a non-directed force on the inner surface of the wing (48) Sr --- - a much smaller cross-section of the wing challenges part (60 ), which part lies between the wing (48) and a channel intended for high pressure and thus ttes for hogtryeket, so that the wing affecting force 1: direction outwards becomes only a fraction of the force that would affect the wing, if its entire inner surface is exposed to the high pressure.

Device according to claim 1, characterized in that said parts (60) are constituted by piston pins, which are displaceable in bores, which are arranged between the inner end faces of the wings and the high-pressure channels near the rotor shaft (27), the piston pins abut against the said inner surfaces on the wings.

Device according to claim 1, characterized in that the outer ends of the wings (48) are provided with spaced apart sealing edges on the parts of the wings (48) which abut against the duct and circumferential walls of the rotor chamber (24), the sealing edges as usual the outer part of the wing (48) forms part of a pressure chamber which communicates with the space inside the inner part of the wing (48). Request publications: Patentskrifter 'rem Sverige 141 221; Germany 962 770; USA 2 786 422. Stockholm 1962. Kungi. Boktr. P. A. Norstedt & Saner. 620089 61 crig • 4 GENERAL STAFF UTOGR. INSTALLATION 61 LITOGR. INSTITUTION