SE190853C1

SE190853C1 -

Info

Publication number: SE190853C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: W J Eggington och E G Tattersall Prioritet begtird frau den 11 mars 1960 (Storbritcrnnten) Foreliggande uppfinning avser fordon av det slag som i drift atminstone delvis uppbarns Over en yta som fordonet gar fram Over eller svavar Over genom en av under tryck sta.ende gaskudde, vilken bildas och upprattWiles under fordonet medelst atminstone en mediumrida, som bildas genom fran atminstone en pa fordonets undersida befintlig avgivningsoppning, och fordonet pa undersidan är forsett med atminstone en f8r mottagande av fran en avgivningsoppning utstrommat medium avsedd atervinningslippning. Inventors: WJ Eggington and EG Tattersall Priority commenced on 11 March 1960 (Great Britain) The present invention relates to vehicles of the type which in operation are at least partially burned over a surface which the vehicle advances over or hovers over through a gas cushion under pressure. , which is formed and established under the vehicle by means of at least one medium ridge, which is formed through at least one discharge opening located on the underside of the vehicle, and the vehicle on the underside is provided with at least one recovery slip for receiving medium discharged from a discharge opening.

Vid sadana fordon utstrommar det fluidum, som bildar ridan eller ridderna, normalt genom en port eller en serie av portar, tillforselportar, som utformats pa fordonets undersida. In such vehicles, the fluid forming the curtain or knights, normally flows out through a port or series of ports, supply ports formed on the underside of the vehicle.

Vid drift pa ringa hojder, exempelvis nar atervinningsporten befinner sig ph en blijd frail ytan motsvarande tillfifaselportens vidd, dvs. avstandet mellan tillforselportens inre och yttre kanter, eller under denna hOjd, viiket kan bliva fallet vid start och landning eller da det lokala spelrummet är litet vid passerandet Over ett hinder, far ridan istallet for att bilda en kudde av fluidum under tryck och medelst denna kudde avb8jas f Or att instromma jamnt i atervinningsporten en ten-dens att stota mot atervinningsportens insida. Harvid bliver fluidumatervinningen dalig och fluidumkudden far endast tamligen lagt tryck. When operating at low altitudes, for example when the recovery port is located at a gentle frail surface corresponding to the width of the supply phase port, ie. the distance between the inner and outer edges of the supply port, or below this height, which may be the case during take-off and landing or when the local clearance is small when passing over an obstacle, the curtain instead of forming a cushion of fluid under pressure and by this cushion to flow evenly into the recovery port tends to strike the inside of the recovery port. In this case, the fluid meter recovery becomes poor and the fluid cushion only receives quite a bit of pressure.

Det for den foreliggande uppfinningen särskilt kannetecknande utgares darav, alt Atervinningsoppningarna aro anordnade pa sadant satt, t. ex. hogre, i forhallande till avgivningsoppningen och/eller att organ, t. ex. i form av skarmar eller liknande, aro anordnade for att hindra att fran en avgivningsoppning utstrontmande medium far direkt tilltrade till en atervinningsoppning, i andamal att vid ringa avstand mellan fordonsbottnen och ytan atmins- tone en del av det medium som bildar ridan skall stromma mot gaskudden och avb8jas av denna mot en atervinningsoppning i en i huvudsak horisontell riktning. What is particularly characteristic of the present invention is that the recovery openings are arranged in such a way, e.g. higher, in relation to the delivery opening and / or that organs, e.g. in the form of screens or the like, are arranged to prevent the medium emanating from a dispensing opening from directly entering a recovery opening, in the event that at a small distance between the vehicle bottom and the surface at least part of the medium forming the curtain is to flow towards the gas cushion and deflected by it towards a recovery opening in a substantially horizontal direction.

Fluidumstrommen forbi atervinningsporten kan underlattas genom att atervinningsporten utformas sasom en grupp askilda, separata portar. Enligt ett kannetecken f8r uppfinningen am fordonet sa utformat, att det atervunna fluidet atervinnes genom en grupp av sarskilda portar, vilka aro anordnade pa nagot avstand frau varandra i ringform, varvid atminstone en del av det ridan bildande fluidet kan s trauma Mat mellan de enskilda portarna i riktning mot gaskudden, styras runt och utat medelst gaskudden och sedan stromma till de enskilda atervinningsportarna i en huvudsakligen horisontell riktning. The fluid flow past the recovery port can be facilitated by designing the recovery port as a group of separate, separate ports. According to a feature of the invention, the vehicle is designed so that the recovered fluid is recovered through a group of separate ports, which are arranged at some distance from each other in an annular shape, whereby at least a part of the ride-forming fluid can be traumatized between the individual ports. in the direction of the gas cushion, guided around and out by means of the gas cushion and then flowing to the individual recovery ports in a substantially horizontal direction.

Alternativt till anordnandet av en grupp enskilda portar, eller dessutom, kan fluidumflodet forbi atervinningsportarna underlattas genom att atminstone den inre kanten av Atervinningsporten eller -portarna gores hogre an tillforselportens kanter, varvid alltsa atervinningsporten eller -portarna far en viss lutning mot kudden. Enligt ytterligare ett kannetecken for uppfinningen ãr saledes den inre kanten av vane atervinningsport upphojd i forhallande till tillforselportens kanter. Alternatively to the arrangement of a group of individual ports, or in addition, the flow of fluid past the recovery ports may be facilitated by making at least the inner edge of the recovery port or ports higher than the edges of the supply port, i.e. the recovery port or ports have a certain inclination towards the cushion. According to a further feature of the invention, the inner edge of the usual recovery port is thus raised in relation to the edges of the supply port.

Fluidumflodet kan underlattas ytterligare om tillforselportens yttre kant sankes i forhallande till dess inre kant, varvid saledes tillforselporten lutas mot kudden, varjamte varje atervinningsport befinner sig pa samma niva. som tillforselportens inre kant eller atminstone atervinningsportens inre kant befinner sig hogre an tillfarselportens hire Rant. The fluid flow can be further omitted if the outer edge of the supply port is lowered in relation to its inner edge, whereby the supply port is thus inclined towards the cushion, and each recovery port is at the same level. as the inner edge of the supply port or at least the inner edge of the recovery port is higher than the hire edge of the supply port.

Normalt utgores det fluidum, som bildar ridan, av en gas, vanligen luft eller en blandning av luft och avgaser. I det foljande kommer ridart att beskrivas sasom bestaende av 2— — luft, fiven om andra gaser eller fluida, sisom vatten, kunna anvfindas. For det fall att ridan Midas av en gas bestar kudden likaledes av samma gas och for enkelhetens skull kommer det i det foljande att antagas, att kudden bestar av luft. Normally the fluid forming the curtain is a gas, usually air or a mixture of air and exhaust gases. In the following, ridar will be described as consisting of 2— - air, fiven if other gases or fluids, sisom water, can be used. In the event that the ride Midas of a gas consists of the cushion likewise of the same gas and for the sake of simplicity it will be assumed in the following that the cushion consists of air.

Uppfinningen kommer i det foljande att beskrivas narmare med hfinvisning till bifogade ritningar, pa vilka ett flertal olika utforingsf ormer visas. The invention will be described in more detail below with reference to the accompanying drawings, in which a number of different embodiments are shown.

Fig. 1 visar schematiskt luftflodesmonstret vid ett pa ringa hojd arbetande fordon, varvid uppfinningen icke tillfimpas; fig. 2 visar i planvy undersidan av ett for-don enligt uppfinningen; fig. 3 visar ett vertikalsnitt genom fordonet enligt fig. 2; fig. 4 visar i storre skala en del av fordonet enligt fig. 2, varvid luftflodesmonstret askadliggores schematiskt; fig. 5 visar ett snitt utmed linj en A—A. i fig. 4, varvid luftflodesmonstret visas schematiskt; fig. 6 Kr ett fig. 5 liknande delsnitt, varvid emellertid en modifikation visas; fig. 7 liknar fig. 5 och 6, men visar ytterligare en modifikation; fig. 8 visar liksom fig. 4 en del av fordonets undersida i planvy, men askadliggor en modifikation av portarrangemanget; fig. 9 visar ett tvarsnitt lings linjen B—B i fig. 8; fig. 10 är ett delsnitt, som visar ytterligare ett portarrangemang; fig. 11 visar ett tvarsnitt, liknande fig. 10, men askadliggorande en modifikation av portarrangemanget enligt denna figur. Fig. 1 schematically shows the air flow sample in a low altitude vehicle, the invention not being practiced; Fig. 2 shows in plan view the underside of a vehicle according to the invention; Fig. 3 shows a vertical section through the vehicle according to Fig. 2; Fig. 4 shows on a larger scale a part of the vehicle according to Fig. 2, the air flow sample being schematically damaged; Fig. 5 shows a section along line A-A. in Fig. 4, showing the air flow sample schematically; Fig. 6 is a partial section similar to Fig. 5, but showing a modification; Fig. 7 is similar to Figs. 5 and 6, but shows a further modification; Fig. 8 shows, like Fig. 4, a part of the underside of the vehicle in plan view, but shows a modification of the door arrangement; Fig. 9 shows a cross-section along the line B-B in Fig. 8; Fig. 10 is a partial section showing a further door arrangement; Fig. 11 shows a cross-section, similar to Fig. 10, but showing a modification of the door arrangement according to this figure.

Vid fordon av det ovan omtalade slaget resulterar luftkuddens tryck i att luftridan avbojes utat och kudden uppratthalles medelst denna rida. Vid konstant massflode och konstant hojd fix kuddens tryck beroende av ridans krokningsradie, dvs. andringen av luftridans moment, varvid trycket bliver dess hog-re ju mindre krokningsradien är. Krokningsradien bestammes normalt av den hojd, pa vilken fordonet skall arbeta, och variationer av radien kunna dfirfor normalt joke utnyttjas fOr variation av kuddens tryck. Vid ringa driftshojder, speciellt vid hojder understigantle tillfiirselportens horisontella vidd, stores emellertid det normala flodesmonstret, varvid ett resultat ungefar air det i fig. 1 visade slaget erhalles. Den frail tillforselporten 1 utstrommande luften maste stromma genom en fillstrypt bana Indian fordonets undersida och ytan och detta resulterar i ett node Hied hog hastighet och lagt statiskt tryck. Vidare tenderar luftstrommen att st8ta mot kanalens insida omedelbart innanfor atervinningsporten 2, istfillet for att styras runt. Luften avbojes saledes endast till en del av sin normala avbojning och far s tor krokningsradie, varvid en luftkudde av Mgt tryck eriAlles. I de fall, dá den genom atervinningsporten 2 atervunna luften normalt fares till en flat for att fa ett energitillskott fir det sannolikt att forhfillandena forvarras, eftersom sugkraften fran flfikten till foljd av det ringa luftflodet frail tillforselporten 1 till atervinningsporten 2 kan fororsaka uppkomsten av undertryck vid atervinningsporten 2, varvid luftkuddens tryck givetvis minskas ytterligare. Vid extremt laga htiojder och allvarlig tillstrypning av luftflodet fran tillforselporten till atervinningsporten kunna till och med negativt verkande krafter uppkomma. In vehicles of the type mentioned above, the pressure of the air cushion results in the air curtain being deflected outwards and the cushion being maintained by means of this curtain. At constant mass flow and constant height, fix the pressure of the cushion depending on the radius of curvature of the curtain, ie. the change in the torque of the air curtain, whereby the pressure becomes higher the smaller the radius of curvature. The radius of curvature is normally determined by the height at which the vehicle is to operate, and variations in radius can therefore normally be used to vary the pressure of the cushion. At low operating heights, especially at heights below the horizontal width of the supply port, however, the normal river pattern is stored, whereby a result of approximately the stroke shown in Fig. 1 is obtained. The frail supply port 1 outflowing air must flow through a filleted path of the underside and surface of the Indian vehicle and this results in a node hied high speed and added static pressure. Furthermore, the air stream tends to abut the inside of the duct immediately inside the recovery port 2, instead of being guided around. The air is thus deflected only to a part of its normal deflection and has a large radius of curvature, whereby an air cushion of high pressure eriAlles. In cases where the air recovered through the recovery port 2 is normally taken to a flat to obtain an energy supply for the conditions are likely to be exacerbated, since the suction force from the flow due to the small air flow from the supply port 1 to the recovery port 2 can cause the formation of negative pressure. the recovery port 2, whereby the pressure of the air cushion is of course further reduced. At extremely low altitudes and severe constriction of the air flow from the supply port to the recovery port, even negative forces can arise.

Sasom omtalats ovan är luftkuddens tryck bland annat beroende av luftridans krokningsradie. Om luftridan vid ringa hojder kan avbajas utmed en mindre radie kan en tryckolining erhallas, vilken motverkar av andra anledningar uppkommande tryckf all. As mentioned above, the pressure of the airbag depends, among other things, on the radius of curvature of the air curtain. If the air curtain can be deflected at small heights along a smaller radius, a pressure line can be obtained, which counteracts pressure pressure arising for other reasons.

Fig. 2, 3, 4 och 5 visa ett fordon enligt uppfinningen och askadliggora ett salt att paverka den ridabildande luften och pa detta satt uppratthfilla luftkuddens tryck. Pa fordonets undersida, intill dess yttre kant, fir utformad en runt om gaende tillforselport 5. Likaledes fordonets undersida och omedelbart innanf Or tillforselporten 5 är utformad en grupp separata atervinningsportar 6. Varje atervinningsport 6 fir skild &fin angransande port medelst ett parti 7, som utgor en del av fordonets undersida. Samtliga htervinningsportar stâ i forbindelse med en gemensam Overforingskanal 8, vars andra ande star i forbindelse med tillforselporten 5. I overforingskanalen finnas organ for att giva den filervunna luften ett energitillskott, vilka organ i foreliggande fall schematiskt askadliggjorts sasom flaktar 9, vilka drivas av motorer 10. Figs. 2, 3, 4 and 5 show a vehicle according to the invention and ash salt to affect the riding-forming air and in this way maintain the pressure of the air cushion. On the underside of the vehicle, next to its outer edge, a circumferential supply port 5 is formed. Likewise, the underside of the vehicle and immediately inside the supply port 5 is formed a group of separate recovery ports 6. Each recovery port 6 has a separate & fine adjacent port by means of a portion 7, which forms part of the underside of the vehicle. All recovery ports are connected to a common transfer channel 8, the second spirit of which is connected to the supply port 5. In the transfer channel there are means for giving the filered air an energy supplement, which means in the present case are schematically damaged as flakes 9, which are driven by motors 10. .

Ett luftinlopp 12 fir anordnat vid fordonets framre uncle och luft, som inkommer genom inloppet, passerar till en kompressor eller flat 13, vilken drives medelst en motor 14. Luften frail kompressorn strommar till en tillforselkanal 15, vilken fir belagen innanf Or overforingskanalen 15. Ett flertal klaffar 16 tillata forbindelse mellan tillforselkanalen 15 och Overforingskanalen 8. En drivkanal 17 star likaledes i forbindelse med tillforselkanalen 15 och slutar med ett drivmunstycke 18 vid fordonets bakre ande. Drivmunstyckets utloppsarea kan varieras medelst forskjutbara spjall 19, som aven kunna tillsluta munstycket fullstfindigt. Fordonet kan avert forses med andra, med reglerklaffar utrustade utloppskanaler for fistadkommande av ett sidotryck och/eller ett vridmoment. An air inlet 12 arranged at the front of the vehicle and air entering through the inlet passes to a compressor or flat 13, which is driven by a motor 14. The air from the compressor flows to a supply duct 15, which feeds inside the transfer duct 15. A a plurality of flaps 16 allow connection between the supply channel 15 and the transfer channel 8. A drive channel 17 also communicates with the supply channel 15 and terminates with a drive nozzle 18 at the rear end of the vehicle. The outlet area of the drive nozzle can be varied by means of displaceable dampers 19, which can also close the nozzle completely. The vehicle can be averted with other, with valve flaps equipped with outlet channels for the occurrence of a side pressure and / or a torque.

Till en borjan, nar fordonet sates igang, oppnas klaffarna 16 och luften strommar fran tillfOrselkanalen 15 till overforingskanalen 8. Luften passerar flaktarna 9 och erhaller av tiessa ett energitillskott, varefter den utstrommar fran tillforselporten 5 i riktning nedat och mat i form av en rid& En kudde av tryckluft bildas under fordonet och fordonet upp- — —a bares ovanfor ytan. Vid normala hojder avbojes luftridan runt och uppat till atervin- ningsportarna. Den storsta delen av den ridin bildande luften atervinnes och klaffarna 16 slutas narmelsevis helt, varvid endast tillrack- ligt med luft tillates passera fran tillforselkanalen till overforingskanalen for att ersatta den fran systemet forlorade luftmangden for ridan. To begin with, when the vehicle is started, the flaps 16 are opened and the air flows from the supply duct 15 to the transfer duct 8. The air passes the flakes 9 and receives from this an energy supplement, after which it flows out from the supply port 5 in the downward direction and food in the form of a ride. cushion of compressed air is formed under the vehicle and the vehicle is raised above the surface. At normal heights, the air curtain is deflected around and up to the recovery ports. Most of the air forming the curtain is recovered and the flaps 16 are closed almost completely, allowing only sufficient air to pass from the supply duct to the transfer duct to replace the amount of air lost from the system from the curtain.

Vid lagre hOjder, sasom vid start, strommar emellertid luften mat under fordonets under- sida i en riktning, som ãr avsevart mycket narmare den horisontella riktningen an dâ fordonet gar pa den normala hifdden. En del av luften fran tillforselporten strOmmar Mat over partierna 7 och avbojes sedan runt och utAt i ett horisontellt plan, tillbaka i riktning mot atervinningsportarna 6. Den avbojda luften strOmmar in i atervinningsportarna och stravar att forhindra att den ovriga delen av den fran tillf5rselporten utstrommande luf- ten stoter mot atervinningsportens inre vagg, och atervinningen av den ridan bildande luften bliver dad& effektivare. Den ridan bildande luftens str5mning Mat Over partierna 7 och dess avbiijning utd.t medelst luftkudden sakerstaller bildandet och uppratthallandet av en luftkudde med ett tryck, som ãr tillrackligt for fordonets uppbarande. Aven om icke hela mangden av den Han bildande luften avboj es direkt av luftkudden tvingas dock den avbojda delen att avb8jas med sa mycket mindre krokningsradie an da fordonet arbetar pa normal h5jd, att denna mindre luftmangd Or tillracklig for uppratthallandet av normalt try& pa luftkudden. At lower altitudes, as at take-off, however, the air flows food under the underside of the vehicle in a direction which is considerably closer to the horizontal direction than when the vehicle is traveling at the normal height. Some of the air from the supply port flows Food over the batches 7 and is then deflected around and out in a horizontal plane, back in the direction of the recovery ports 6. The deflected air flows into the recovery ports and strains to prevent the rest of the supply air from flowing out of the supply port. - ten abuts the inner cradle of the recovery gate, and the recovery of the curtain-forming air becomes dad & more efficient. The flow of air forming the curtain Mat Over the portions 7 and its deflection by means of the air cushion slows down the formation and maintenance of an air cushion with a pressure which is sufficient for the support of the vehicle. Although the entire amount of air forming is not deflected directly by the airbag, the deflected part is forced to deflect with such a much smaller radius of curvature than when the vehicle is operating at normal height that this smaller amount of air is sufficient to maintain normal pressure on the airbag.

Verkningsgraden pa luftfl5det for ridan till och in i atervinningsporten eller -portarna kan okas ytterligare, eller kan den foreliggande verkningsgraden uppratthallas vid minskad hajd, om den inre kanten pa atervinningsporten eller -portarna hojes i fOrhallande till tillforselporten. Detta visas i fig. 6, som utgor ett mot fig. 5 svarande tvarsnitt. Fordonets botten 25 liar hojts i forhallande till UM-setporten 5 och partierna 7 samt atervinningsportarna 6 aro saledes anordnade med en viss lutningsvinkel mot horisontalplanet, mat mot kudden. 'Atervinningsportarnas 6 inre kanter 26 Oro saledes belagna hogre On bade tillfOrselportens 5 kanter och atervinningsportens yttre kant. Av fig. 6 framgar, att fordonet kan narma sig ytan ytterligare medan tillracklig avbojning av ridafluidet fortfarande erhalles och flEidet till atervinningsporten fortfarande Or jamfOrelsevis effektivt. Den erforderliga avbojningen av ridaluften och den tamligen godtagbara atervinningsverkningsgraden kunna bibehallas till och med vid annu lagre hojder om Oven tillfOrselportens inre kant Ups i forhallande till tillforselporten, varigenom denna saledes kommer att luta i forhallande till vertikalplanet, mat mot kudden. Det enk-laste sattet att uppna detta Or att sanka till- f5rselportens yttre kant. Fig. 7 visar en konstruktion, varvid tillforselportens inre kant 27 befinner sig hogre On dess yttre kant 28 och varvid atervinningsportens inre kant 26 hojts ytterligare, sâ att den befinner sig hifigre On atervinningsportens yttre kant. Ett fordon med portarna utformade pa detta salt kan arbeta pa mycket ringa hojder och till och med ned till en hOjd varvid tillfOrselportens yttre kant 28 kr& den yta, Over vilken fordonet uppbares. The efficiency of the air flow for the carriage to and into the recovery port or ports may be further increased, or the present efficiency may be maintained at reduced height if the inner edge of the recovery port or ports is raised relative to the supply port. This is shown in Fig. 6, which constitutes a cross section corresponding to Fig. 5. The bottom 25 of the vehicle is raised in relation to the UM set port 5 and the portions 7 and the recovery ports 6 are thus arranged with a certain angle of inclination towards the horizontal plane, food towards the cushion. The inner edges of the recycling ports 6 are thus coated on the upper edges of both the 5 edges of the supply port and the outer edge of the recycling port. From Fig. 6 it can be seen that the vehicle can approach the surface further while sufficient deflection of the riding fluid is still obtained and the flow to the recovery port is still relatively efficient. The required deflection of the riding air and the fairly acceptable recovery efficiency can be maintained even at even lower heights about the inner edge of the Oven supply port Ups in relation to the supply port, whereby it will thus lean in relation to the vertical plane, food towards the cushion. The easiest way to achieve this is to lower the outer edge of the supply port. Fig. 7 shows a construction in which the inner edge 27 of the supply port is located higher than its outer edge 28 and in which the inner edge 26 of the recovery port is further raised so that it is located higher on the outer edge of the recovery port. A vehicle with the gates formed on this salt can operate at very low heights and even down to a height whereby the outer edge of the supply port 28 SEK & the surface over which the vehicle is supported.

Fig. 8 och 9 visa schematiskt ett annat portarrangemang, varvid ridaluften utkommer fran en grupp separata tillforselportar och atervinnes genom en grupp separata Mervinningsportar. I detta fall Oro tillfOrsel- och atervinningsportarna anordnade alternerande med varandra, sida vid sida, och Oven anordnade med lutning mot horisontalplanet, i riktning mot luftkudden. Ridaluften utkommer fran de separata tillforselportarna 30 och atervinnes genom de separata atervinningsportarna 31. Tillforsel- och atervinningsportarna Oro anordnade alternerande med varandra i ringform och Oro anordnade i vinkel mot fordonets bottenyta, sasom visas i fig. 9. Riddluften tillfores genom overforingskanalen 8, som vid vardera anden utformats med separata ror 32, vilkas undre andar Oro forbundna med tillforselportarna 30 och atervinningsportarna 31. Luften strOmmar inat fran tillforselportarna i riktning mot kudden och avbojes sedan eller styres runt, intill dess att den strOmmar utat. Luften instriimmar sedan i atervinningsportarna, varefter den strOmmar uppat genom roren 32 och inkommer i Overforingskanalen 8. Figs. 8 and 9 schematically show another gate arrangement, in which the riding air emerges from a group of separate supply gates and is recovered through a group of separate Mewinning gates. In this case, the Oro supply and recovery ports are arranged alternately with each other, side by side, and the Oven arranged with inclination towards the horizontal plane, in the direction of the air cushion. The riding air exits from the separate supply ports 30 and is recovered through the separate recovery ports 31. The supply and recovery ports Oro arranged alternately with each other in annular shape and Oro arranged at an angle to the bottom surface of the vehicle, as shown in Fig. 9. The riding air is supplied through the transfer channel 8. each duct is formed with separate tubes 32, the lower spirits of which are connected to the supply ports 30 and the recovery ports 31. The air flows inwardly from the supply ports toward the cushion and is then deflected or directed around until it flows outwardly. The air then flows into the recovery ports, after which it flows upwards through the tubes 32 and enters the Transfer Channel 8.

Ytterligare ett portarrangemang visas schematiskt i fig. 10, varvid bade tillfarselporten och atervinningsporten Oro ringformade och varvid atervinningsporten befinner sig ovanf Or tillfOrselporten och Or vand inat. Ridaluften ledes genom overforingskanalen 8 till den ringformade tillforselporten 35, vilken Or anordnad att avgiva ridaluften indt i riktning mot luftkudden. Ridaluften avb8j es medelst luftkudden och strOmmar utal till den ringformade atervinningsporten 36, vilken Or be- lagen innanfor och ovanfor tillforselporten 35 och sasom redan omtalats Or vand inat. Fran atervinningsporten 36 strOmmar luften till overforingskanalen 8. Atervinningsporten 36 avgransas upptill av fordonets botten 37 och undertill av en forlangning 38, som utskjuter frail tillforselportens 35 ovre kant. For att forbattra stromningen pa den ena eller bada sidorna om forlangningen 38 kan denna ut- formas p0 olika satt, och ett ypiskt exempel harpa visas i fig. 11. A further gate arrangement is shown schematically in Fig. 10, wherein both the supply port and the recovery port are annular and wherein the recovery port is located above the supply port and in water. The riding air is led through the transfer channel 8 to the annular supply port 35, which Or is arranged to discharge the riding air in the direction of the air cushion. The riding air is deflected by means of the air cushion and flows indiscriminately to the annular recovery port 36, which is located inside and above the supply port 35 and as already mentioned. From the recovery port 36 the air flows to the transfer channel 8. The recovery port 36 is delimited at the top by the bottom 37 of the vehicle and below by a extension 38, which projects from the upper edge of the supply port 35. In order to improve the flow on one or both sides of the extension 38, this can be designed in different ways, and a typical example of the harp is shown in Fig. 11.

Vid utnyttjande av de ovan omtalade konstruktionerna far ridaluften lattare att bilda och uppratthalla luftkudden vid sma arhetshojder och luftkudden kan i sin tur lattare astadkomma- ridAluftens aybojning. Den del 4— av den ridabildande luften, som skall atervinnas, atervinnes effektivare och fordonet kommer att arbeta stabilt aven pa mycket sma hoj der. When utilizing the above-mentioned constructions, the riding air becomes easier to form and maintain the air cushion at small working heights, and the air cushion can in turn more easily achieve the airflow of the riding air. The part 4 of the riding-forming air to be recovered is recovered more efficiently and the vehicle will operate stably even at very small heights.

Den. atervunna luften kan utnyttjas pa ett flertal salt utom att cirkuleras tillbaka till samma rida, och kan saledes utnyttjas for att bilda en annan rida eller anvandas for framdrivningen. The. the recovered air can be used on a plurality of salts except to be circulated back to the same ride, and can thus be used to form another ride or used for propulsion.

Da flera ridasystem an ett utnyttjas, exempelvis da tva eller flera i huvudsak parallella ridasystem utnyttjas utmed atminstone en del av fordonsbottnens periferi, är det normalt endast nodvandigt att portarna for det ena ridasystemet, na.'mligen antingen det inre eller yttre systemet, anordnas pa det angivna sattet. Bada ridasystemen kunna emellertid om sa onskas ha portarna, anordnade pa det angivna sattet, och portarna i det ena systemet kunna vara anordnade pa annat satt an portarna i det andra systemet. When several riding systems are used in one, for example when two or more substantially parallel riding systems are used along at least a part of the periphery of the vehicle bottom, it is normally only necessary that the gates for one riding system, namely either the inner or outer system, are arranged on the specified set. However, both riding systems may, if desired, have the gates, arranged in the specified manner, and the gates in one system may be arranged in a different way than the gates in the other system.

Det inses, att nar fordonets hojd okar kommer ridans luftstrom att variera intill dess att dâ fordonet befinner sig vid eller nara den. normala arbetshojden ridaluften forst strommar neat och mat mot ytan och sedan bojes inal mot luftkudden, som ytterligare avhojer luften uppat och utat mot den ifragakommande atervinningsporten pa det normala sattet. It will be appreciated that as the height of the vehicle increases, the airflow of the curtain will vary until the vehicle is at or near it. normal working height the riding air first flows neatly and food towards the surface and then bends inwards towards the air cushion, which further raises the air upwards and outwards towards the recovery port in question in the normal way.

Claims

Patent claim:

Vehicle of the type which in operation is at least partially supported Over a surface the vehicle passes over or hovers over through a pressurized gas cushion, which Midas and is maintained under the vehicle by means of at least one medium slide, which is formed by from at least one . there is a discharge opening on the underside of the vehicle, and the vehicle on the underside is provided with at least one. for receiving medium recovered from a dispensing opening intended recovery opening, characterized in that the recovery openings (6, 31, 36) are arranged on such salt, e.g. higher, in relation to the delivery opening (5, 30, 35) and / or that means (7, 38), e.g. in the form of shields or the like, are arranged to prevent any flowing medium from a discharge opening from directly entering a recovery opening, in that at least a part of the medium flowing towards the gas cushion is to flow towards the gas cushion and deflected at a small distance between the vehicle bottom and the surface. of this towards a recovery opening in a substantially horizontal direction.

Vehicle according to claim 1, characterized in that for dispensing medium for forming the curtain there is an annular dispensing opening (5) and that for the alloying there are a number of separate recycling tips (6), which are coated immediately inside the dispensing opening and at some distance from each other in the form of a ring.

Vehicle according to claim 1, characterized in that for dispensing medium for forming the curtain there is a group of separate dispensing openings (30), which are arranged alternately with a group of separate recovery openings (31) in such a way that the dispensing openings together with the recovery openings form a around the underside of the vehicle.

Vehicle according to patent claim 3, characterized in that the dispensing openings (30) and the recovery openings (31) are formed by the spirits of adjacent tubes (32).

Vehicle according to claim 2 or 4, characterized in that the discharge openings (5, 30, 35) and / or the recovery openings (6, 31, 36) are arranged at an angle to the horizontal plane and directed inwards towards the space occupied by the gas cushion.

Vehicle according to claim 1, characterized in that the recovery openings (6, 36) are directed horizontally inwards towards the space occupied by the gas cushion. Request publications: