DE1451702A1 - Rotary piston engine - Google Patents

Description

3551

Curtlso-Wright Corporation, Hew York, N.Y., USA Rotary piston engine

Bit invention relates to and reviews rotary piston engines in particular on a new Auflentell or housing of such a motor. This can be a rotary piston engine, as it is in the American latentaohrift 2,968,065 let.

According to this patent, these engines are generally made up of an outer part or housing with a cavity inside, the inner surface preferably being an epitrochoid. Inside the cavity there is a runner whose axis runs parallel to the outer part but is offset from it. The outer wall of the runner has several Circumferentially offset edges that touch the inner surfaces of the outer part, so that working kernels are formed which have their volumes change depending on the relative movement of the outer part and runner. On one side of the housing or exterior » there is an inlet opening through which the engine air or a fuel-air mixture is introduced, and an outlet opening, including the exhaust gases produced during the combustion be expelled. An ignition device is provided on the opposite side of the housing in order to produce a warm fuel-air mixture.

As a result of the structure and the mode of operation of such an internal combustion engine, each of the work cycles, namely the intake, tormenting, expansion and releasing, takes place in the same corresponding area of the housing strongly heated, while the area of the housing in which the suction takes place remains relatively cool. From this you can see that

009813/029 1 ORIGINAL BATHROOM

let the housing be subjected to high thermal fluctuations. The effect of heat creates thermal stresses in the housing, which result in bending moments. The bending moments try to act all around on the housing, 30 that its outer wall aion expands or grows around the main axis. Since the inner surface of the outer wall is exposed to higher temperatures than the outer surface, the inner surface tries to expand to a greater extent than the outer surface. The inner surface tries to curve inwards. The shape of the inner surface is arched in a flat length of the motor axis c-lai ·· welligo This change in shape of the inner surface is called; is generally known as warping. In addition to the temperature stresses that act on the housing during operation, the expansion of the gas tries to generate bending stresses around the housing, which also want to change the shape of the housing Gehilussform and thus the performance dea engine and can be used for fatigue, lead Crawl ehnurig or other Katerialbeanspruchungen result of machanlachen voltages! _o

In the conventional designs of rotary piston engines of the type mentioned at the beginning, the plating or the wear-resistant coating, which is normally applied to the inner surface of the outer wall, can also be machined or machined and form occurs, is the deterioration of the gas leakage or seal that is used between the outer wall and the end walls of the engine housing and a gas »

between these 'filing is intended to prevent "this and and", do to the mentioned, herringbone execution forms onteatQH ₃ "ground to be discussed in detail _{below 0}

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009813/029 1

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as possible. You invention behundelt an arrangement between the housing middle part or the outer wall and the End walls, which reduce the thermal deformation and ensure that the trochoid profile is retained. Furthermore, the invention essentially eliminates the chipping of the flattening on the inner surface of the outer wall and reduces the deterioration of the gas seal.

The invention is generally implemented in that the The middle part of the housing or the outer wall is somewhat wider in the axial direction than the runner, so that an inner guide part, the inner surface of which is entoteht on each side of the runner housing is adapted to the inner surface of the runner housing. Each end wall has an outer guide part, the outer surface of which Corresponds to the shape of the inner guide part, extends on both sides of the runner in the inner guide part and tightly clings to the inner guide part. As will be mentioned in detail, this construction leads to a stronger and more stable Kotor ^ ehäuses and allows greater adaptability and mobility in the design.

It is therefore an object of the invention to provide a new, improved housing for a rotary piston engine.

Another object of the invention is a new arrangement for guiding or adjusting the parts in connection with one another the housing of a rotary piston engine.

Another object of the invention is a more stable housing for a rotary piston engine to reduce the thermal deformation and dissipate the mechanical stresses in the housing.

For a better understanding, the invention is described with the aid of a few figures.

Fig. 1 shows a section through a rotary piston engine according to the invention.

BATH ORIGINAL 009813/0 2 91

Pig, 2 shows one. View <.ln Sebnitt lung of the line 2-2 tog

_B 3 is a perspective illustration of some parts of a rotary piston engine according to FIG

Bui den hexfctiiamliehen Ausfüteangsferoen τοη Hotationekolbenmoto- * i © ei © in the above mentioned Aaerikani patent 2,988 are, öas üeliäuee eo is built up, d & ß the outer wall

not wide ©? is as an exercise runner and that the inner surfaces of the forehead abut against the end faces of the outer woaia to create a flat, fss'iiüdiing between the two. To form surfaces »The 3 © siisd the course of the A ^ ß @ nflReh® of the outer wall adapted in the middle of several dowels _s dl® -in- antspre ^ ieaie Faßstift- outer wall slagreifeiia Hie 1? Aßstift® serve,« to Aue-

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To increase the service life of the inner surface of the outer wall ¹ , on which the edge seals slide continuously during operation, it is customary in the conventional embodiments of rotary piston engines to coat this surface with a material of high wear resistance. In the case of an aluminum housing, this area is z. B, chrome-plated · The metal coating extends generally the full width of the inner surface and meets the abutting end wall of the housing, so that a corner is formed there · It has been found that when the engine is operating, the metal coating sometimes at the corners mentioned above flakes off and chipped, so that the inner surface is deformed and the seals are removed.An attempt to solve this problem can be to round or bevel the ends of the coating, but this can result in an undesirable loss of sealing.

The invention has alleviated the above-mentioned problems and some completely eliminated, as can be seen from the individual drillings that now follow.

Figures 1 to 3 »own a rotary piston engine with a Hollow outer part or housing 10 The housing 10 generally has an outer wall 12 and two end walls 14 and 16 are formed which are connected to the housing middle part so that a cavity is formed between them arises, line νeile 18 is rotatably arranged in bearings 20, the are attached to the housing 10. The \ .elle 18 has an eccentric pin 22. Located in the cavity of the housing a runner 24 which is mounted on the eccentric pin 22 with the aid of a simple plain bearing 26, for example. As can be seen from FIGS. 2 and 3, the outer wall of the runner forms three edges offset on the circumference, in each of which one is radial movable sealing strip 28 is attached. The sealing strips 28 seal the runner edges with respect to the inner surface 29 of the outer wall from, so that working chambers 30 are created, the volume of which depends on the relative movement of the rotor 24 and the housing 10 change. The shape of the inner surface 29 of the outer wall is preferably a swiveling Epltrocholde, as shown in FIGS. 2 and 3

009813/0291 _ßAD original

A wear-resistant flatting 32 can be applied to the inner surface 29 of the outer wall 12 to prevent it from being touched Bit the sealing strips 28 a better sliding behavior between the contact surface of the sealing strips 28 and the outer wall 1.? to manufacture. The platinum material can z. B. made of chrome edei steel be composed »although it is not due to this special 3r! stalls is limited.

The Itäufer 24 has an internally toothed gear 34 ₁ there? with raised parts 36 on the rotor and 33 ζ-'λ üan gear and with a screw 40 attached to the rotor Ie.fe ₀ Αλϊ ι the shaft 18 is coaxially mounted an outer toothed gear 42, which with the gear 34 in Engagement is. Bas gear 42 has a radial. Collar 44 'around the gear with screws 46 to the end wall 16 to fix "a cylindrical projection, ler for the shaft 18 a journal bearing surface in ä®m housing IQ bild3t _c The gears 34 and 42 serve to ensure that 4p run it 24 during its Rotary movement of the epitroeholdi & balia fol ^ t « ESm ice outlet 48 (Fig. 2) is on one side of the {housing & n &, eor« lK © t _g ran air or a fuel lsift-iaieeh to let in, Banelsa there is a charger 50p the burned gases or exhaust® eöBsuIasEan .., on the opposite side of the housing katsz * @ in @ ignition device 52 be attached. . .

As you can see in Figure 2 ₉ For the expansion, waae dex · For "pufftakt each on the same ®stspreohendea locations in the housing and instead verursaehen © la woitgehenäss heating this Bereishes while the housing Is the field of Einlaßäffsung remains relatively cool 48th This is also due in part to sum äem introducing -vcn fresh fuel and air in the field of EinlaßSffnimg "Bie Pol ^ e of this is" tHe the housing is not heated glaieimäSig we-i, so that due to the heat "Jeriormungen voltages around in the heated areas If the heat is supplied to the inner surface of the rotor housing, there is also an exn large temperature gradient in the radial direction, which contributes to the temperature stresses · »'Tensions around the (housing. The result of the heating of the housing

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The resulting voltage and the gas explosion can have serious and serious effects on the engine if they are not compensated, as mentioned above 54 bind to the outer wall, and that a gas seal 56, e.g. an asbestos gasket insert or an "O-inlet", can be placed between the forehead wound and the outer wall in order to prevent gas from escaping from the housing escapes »which could lead to loss of density. Axially offset supporting or reinforcing ribs 58 can be arranged on the outer wall 12 in the region of the inlet opening in order to give the outer wall a more secure hold. M and be disposed in the Yerbrennuags- lirpansiona area where larger Hot tr öm <generated "can axially offset cooling fins 60 un to provide air cooling for the motor and 12 provide the outer wall of a better grip below. It should also be mentioned that it was also known to use offset cooling fins on the circumference. " although the axially offset cooling fins are pre-drawn

The Kittel part of laufergeh & usee, which is essentially formed by the outer wall 12 "differs check gemäg AmT Jrfindun * from conventional embodiments in which the outer wall 12 and your inner cladding 52 to the runner" 2A. Aehaenrichtunfi on both sides across the width In addition, as clearly shown in FIGS. 1 and 5, for a better illustration of the invention, lips on the outer wall are omitted in FIG. 3. This axial Terlingeruiigen ®d # r approach se | The outer wall is formed by the inner Ttthruiigeielle S $ «md S4 on both sides of the runner housing Kitteltail ^ ä® ^ sn Ian®a surfaces have the same multi-arched shape and form % M & y ^ Tlirngmiimg üev surface 29» The HtlrnwMnde 14; na 16 @ 1M ai '; Outer ^ sa guide parts 66 and 66 are provided »the 3 @ hM®g®bi.lä®i siad _f d & 8 ni on each side of the Xtöufergeh» ee «4! itt« lt8ll® äa push in the inner guide parts until <3i « 'S ^ lmmMu®. 14 ^ i. 16 adjoin the end faces of the runner 24 »6S in each end wall of the hoto-r« 24 m areas of the outer door parts fi6 -h raffled «on the radial inner part of the

009813/0291

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Motor ~ r. 0! '.' JiR v; ävtt «the outside & wend eonet would interweave or discard. ? Fte ready described "1st dleee" Do not discard he wishes. According to the invention, this is essential eliminated and the outer wall can be made relatively thin at the same time. This is achieved “an” well as shared by the external leadership 66 and 68 which closely fit the inner guide parts 62 and 64 cuddle up, the comparison eu the middle part of the runner housingea are cool, eo that the! pen temperature tensions and therefore also dae. Discard is largely eliminated. Another benefit of this The inner bearing surface of the outer guide roller is the direct one Absorption τοη bending stresses that arise in the engine as a result of the compression and combustion of the gases · These bending stresses usually act in one direction around us d ... B housing or uv the outer wall with different thickness and Torsuchan dae Deform Qehäune · They cause fc material fatigue or Other overexposures to the metals, but the outer guide parts are closely aligned with the inner surface of the outer wall according to the fire and the arrangement with the guide parts unite • Telferest and establish structure guaranteed, the bending stresses του are absorbed by the load-bearing, outer pipe parts and the outer wall largely retains its prescribed geometrical shape during operation.

As indicated further in Figure 1, the flattening 52 on the inner surface of the outer wall does not form corners with the end wall in the areas of high temperature. The lathing 52 extends evenly over the width of the barrel as far as the outer parts 70 and 72 of the end walls and can easily absorb the stresses acting on it as a result of the heating. That. The sealing strips ZB slide on the flattening 32 without any machining, the corners at the ends of the cladding now protrude beyond the width of the edge diagonals of the buyer.

The Gaererachluß or the seal »smell the end walls and the outer wall of the housing deteriorates in the conventional Aue guide ef oraien, because the outer wall is only eo wide was »like the runner and the sealing material between the

009813/02 91

ORIGINAL BATHROOM ■

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ostritotmgea S3ig | © & r & © ht war. GeisM® iar Iffinöiüß is "^ sr HaOTe ^ sehltiB ®a © r the seal 56 (Pigur 1) ®ußepb:; llb of the Gebi © tSf * high heat, because the front wall cl @ r the outer wall protrudes beyond the width of the runner The YHtisiae fluctuations generated by Ib

Furthermore allowed-di © ErfisiiiMg © Ine r @ l. tively simple © arrangement of the cooling fins ₉ w®nn ®tn motor ä @ w the type described above is to be air-cooled · Wi® EigOT 1 shows ₉ kinnen di® cooling fins 60 on ä®r AmS © awaai essial- "over di © Breit © < Arranged outside the Xäwfcrgehaus @ © is _g te® äi © cooling flask for the outer wall, and the cooling fins Iäetaga üfe © r äs ©! Mi © i @ s Lämf © rg © Iiäuse® protrude _s © tee © inen k®mplisi © st © ffi © ä®r veS 'relatively massive structure SM benS.tigasitä Bis® is © iss. ® © hr Yrtinseaworthy feature, because lii ^ 8a? Tli © h®B Wässssufuiii ⁵ b © l derc-rti ^ en motors di cooling fins on Jeeiis ^ © 11 ibsE- ii @ axial® Br © if © See läuferg © - häuees hin & usg @ fliMrt are a @ llten, to ¥ © J2 i @ n Locally limited Wäraeg @ M @ "S @ B die-KiIfMe afesuiHlirajao B @ ii @ r invention are the cooling fins in this G @ M © t ¥@rhM3.taias3äS£g simply masohinell produced. Mim receives @ ia @ a ^ elatiT leated and simple structure uni äi® Außen @ nwenä kasm as a result of ä © E

stock de? outer FÜhnmgatsile.66 ue3 63 Törnahmniemäßig thinly. With regard to the cooling, it is desirable to carry out the outer wall as far as possible, since the heat transfer is better via a thin wall than a thick one, and because the temperature gradient in a thin wall is less and the temperature difference between because the inner surface and the outer surface can be better stabilized and kept constant. As already described, the outer wall can be made relatively thin ₉ without the tfand or the cooling fins arranged on it bulging or warping, since the outer wall is supported and carried on the inside by the outer guide parts 66 and 68.

009813/0291

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It has been found that the good site Bntanhtm. The outer guide parts 66 and 68 are designed so that they fit firmly into the inner guide parts 62 and 64. If so desired, a socket with oversize or a fsatsit "" between the fitted guide parts can be provided in order to obtain an even tighter fit compressive stresses occurring on the inner surface at the highest temperatures and worst operating conditions would cancel »

From what is above it can be seen "that a stable and relatively simple housing is provided for a rotary piston engine which eliminates the annoying deficiencies sometimes encountered in conventional housings for such motors." Construction of the! Furthermore, the housing according to MtHmüwib is suitable for multi-rotor motors in which more than one mim Blnfsrg ^ housing is used «Furthermore 1st dl» Invention gt®i®hw & ti, §, sm £ liquid-cooled, land-air-cooled motors ai ^ eMfeai ^ f

BATH 003813/0291

Claims (1)

- ι * - 14517Q2 hs ρ τ ü * ο he Rotary piston motor with an outer part or housing _for the SWEi end walls ύηά a Außenv. \ JID exists, which are so connected to each other "as to form a cavity, wherein the inner surface of the outer wall a plurality of bulges or sheets which" se that the cavity a nehrbogige Has a shape in which a runner is rotatably mounted in the hollow space, the runner is sealed against the end walls and has several lanten offset on the circumference has "oils seal against the inner surface of the outer wall, so that the working chamber *! are formed, the volume of which is prevented depending on the relative movement of the rotor and the outer part, the working chamber *! Fuel mixture is fed, and in which an outlet opening discharges the burnt gases or exhaust gases from the arbelte chambers "characterized in that the outer wall at least one end portion (62, 64) of the outer wall (72) protrudes over the runner (24), and that at least an end wall (14, 16) of the outer part or housing (10) has a middle part (66, 68) which protrudes inwardly towards the runner (24) and fits into the adjoining end part (62, 64) of the outer wall (12) pushes in, the outer surface of the middle part (66, 68) of the end wall (U ₉ 16) has an aehrboglge shape "which is essentially identical to the shape of the inner surface (29) of the outer wall (12), so that the two surfaces have a Psßeitz form. 2. Rotary piston engine according to claim 1, since you roh ge ■■ -k β a η se ic h η et that both end walls (H, 16) have a central part (66, 68) «which extends into the interior after the rotor (24 ) extends, and the two band parts (6? _f 64) of the outer wall (12) protrude beyond the runner (24). 3 · Rotary piston engine according to claim 1 or 2, characterized thereby. that a wear-resistant layer (52) is applied to the inner surface (29) and the outer wall (12), and that the layer (32) extends axially over the entire width of the inner surface (ZS) of the outer wall (12) extends. 009813/02 91 U51702 4. Rotary piston engine according to claims 1 to 3 »thereby characterized in that the shape of the inner surface (29) the outer wall (12) and the outer surface .es inwardly extending central parts (66, 68) of the end wall (14-16) a BwelboLige: üpitroohoide is, and that the runner (24; drsi on the circumference has rersetete edges. 5. Rotationakobotor according to claims 1 to 4 «thereby gekemnseiohnet that the outer surface of the outer wall (12) has several axially rereetete, circumferential cooling fins (60), and that the cooling ribs (60) are generally distributed over substantially the entire width of the outer wall (12). BATH ORIGINAL Empty soap