US985091A - Rotary engine. - Google Patents

Description

K. 6,-. E. WITTIG.

RUTARY ENGINE. APPLIGATION FILED APRA, 1910.

Patented Feb. 21, 1911.

.the fixe voiving chambers, which 'are connected .with- ROTARY ENGINE.

Specification of Letters Patent.

Patented Feb. l, 1911.

Application filed April 4, 1910. Serial No. 553,239.

To all wimn if, may conc-mm:

lic ii.. known lhiil'/ we, 'KARL ivlrr'rio Iand EMU, Wi'rrio, the first s. subject-ot the Grund Dulce oi Boden und ille second ai subject ot', the King et Snx'ony, both residents of Zell, in Vfie-f..i\tlial, in the freind Duchy of linden, ihri'iminy, ien"` invented new and useful improveinens in .ilolcry ling-illes, oi'. which llic following is :i fnli and exact speeificzition.

l'hc invention rintes `l'o iniprejiveznenis in rotary engines, which may he utilized :is motor4 pumps., ventilators und compressors and which :ire of the l-:ind having n crescent shaped working chmnher divided into :1. cerlaiin mijnheer oi radiuily movable pistons oiirrieal hy e cui, drieal drum eccentricziliymounted in :1 cylindrical casing. In order to counteract the centrifugal forces of the pistons in such engines and al.' the saine time reduce the friction to a minimum, it has alrem'ly been yn'oposed to provide one or more. rerolnhle supporting; rings which serve' to prevent the @nier ends of the pistons com ing into contact with the stationary cylinder und thns relie np the centrifugal forces f the pistons.

New, the present invention relates to iniprovelnents in rotary engines and the like with ievohibie supporting rings of this kind, wherein euch of the supporting rings of an interno? diameter corresponding to, Unep prosimntely corresponding to the diameter of the cylinder here, is located in a. groove "in the cylinder Woll with a certain amountl of play in pienes at right angle to theaxis of the engine shaft. But einem; he'pressure existent within the engine tends to displace the revoluble supporting rings radially Witl'i considerebleforce, each of the supporting rings is, eccording to the present invention, provided with partitions extendin in the direetion of the exis end fitted to-t e outer' giirfeces of the revoluhiesupportingringg the said 4iertitions yieidingly cesing and forming thereby-lr@ the interior-ofthe engine lsind inwhich the pressure .iinid is. edrnitted, in order# to counterbalsince the inner radial pressure," pressure and the the intensity of theiuid sii/,e of thesaid pressureeouuterbalancing chambers determining the de ree of the opuntelbalancingeect. In or' er, in a.. ro' tary engine of 4this kind, toV 'maintain the r`el bearing' gemist l quired tightness at the end feces aga-inst which the revoluble parts torn, notwithstanding; the difierence-sY in'expansion of the revoluhle parts (pistons carrier :rnd pistons) and the fixed easing, un endrwull of the cas 60 ing is rinde movable relatively to the revelnhl parte. and subjected to the action of :1 'pres ire device, in such c manner that the contacting surfaces of the seid revoluble pei-ls and of the seid end Wall running on noch other, are pressed against each other und ihe, when the friction between the end w'ili and the revclnhle parts becomes too ,weer he said end wall and revolnble part-s move together to o. slight extent and slacken thereby sonieiviiet the pressure device.' In order, furthermore, to produce the colnpenA sation effect already known in connection with air pumps having reciprocating pistons (coinmuniction between both cylinder ends for a sh time at each dead point position of the piston), in e rotary engine of 'this kind, which is to be used as an air or gas pump, the engine is provided with connect-VV ing chenneis which serve as connectiowbetween the Working cells, which have just'expolled their eontentsand those which haveA completed their suction action.

To enable our inventionV to be fully understood We wiil describe the saineby reference to the accompanying drawings, in which :,f

Figure i viitistrates e section on the line fr, fr, of Fig. 2 of a rotary engine constructed in accordance with our invention. F-ig.2 's

a vertical section of the same on the liney, y 90 of Fig. l. Fig. 3 :mend view,.part1 in section on the line e, e of Fig. 1, and igs. 4, 5

and. 6 show inodiications of of .the

'en ine. y n the .construction shown in Figs. 1, 2

and 3, e piston 'carrier ordrum 1 -is-eccentrically 4mounted in the eyittiiegleasing 2.

The creseenbsha ed,

Illy a ,numberJ cnf-.pistons- 3' vided into cells which may be made ofthip hardened steel Two supporting rings -4 `whieh volve with the said pistons 3,- endtnke up platee.

the centrifugal forces of' the. 4423,111@'proef ticaily 'Without friction, .have "an inner (1ianeter, which is the same astht'o the cyl- 1,05

inder chamber 2, and are inserted in grooves 5, sothat they can move uitefreely' perf.

.pendicularly to thejlon itu 'themselves to the oter ren i-ugly :Contact with the casing, thus previdinake sure of the pistons 3 contacting equally i wellfivith the supportiner rings and with the cyliiider lwall.

liy arranging the supporting` rings. in grooves in 'the cylinder wall `and giving thein radial play, as described, the ai'iniilar space hehind each ring 4t may he used for tl i e piirpose et' counterhalancing the inner radial pre'ssure on the rings 4. Such a eoiinterhalancing,l etfect is attained hy fitting the exterior of the supporting, -rii 4. with partitions 6 which. entendx thty direction ot' -the axis,. and yieldinte.;v limited revolving l,pressi re `count-einhal- -ancin'g chalutiers around .the rfigs 4. These .changibers are directly connected with the interiorV ot the engine by means of channelsl torinedby simple horiiigs which convey the pressure. The partitions G are simplyl inserted into grooves in the rings 4 ani-t arepressed close against .the housing by the centrifugal force which renders springs and the .like unnecessary for this purpose. The partition-s (3 and channels 7, which rei-'olve-with therings 4, act on the oil like centrifugal pumps and continually lpress the sai behind-the rings 4C so that these always rin neoil. Although it may appear to be hest to conn neet each pressure chamber with the point heinterior'ot' the machine situa-ted dily.rj 1di ally opposite to its middle part this. is vnotlalways so, since there are forces iiiaildition to the radial pressure acting on theri-ngs-; For example, when the engine l s used an tir puinp,` there is considerable riction between the pistons and their guides on that side of the engine on which compression, tak'es pla-ce7 andas a result the pistons press more strongly outward on to the rings ll on this side Ithan on the other side, and consequently an increased coiinterhalancin'g action ofthe rings 4 trom tlie'inner pressure. is required on theeompression side. This increased., counterhalancing actionv may be effected 'by connecting the pressure counterloaljanciiiggr chambers with points of the interior of the engine which arein advance relatively to the direction of rotation, since the internal pressure increases on the coinpression side. in the direction of rotation. This particular construction is illustrated at theup-per part ot Fig. Q .where it will he seen that the part 7 rims ohliquely through the supporting rind. In rotary inotire i'iower engines (motors on the. other hand. the liitions are reversed), a weakened coiii'iterhalencino' action lening1 necessary, which attained hy forward displaceine. t; lof the channel 7 in the direction in which the volume of the cells increases.

will he understood that the channels 7- nnihhe fitted in the fixed instead of the rc* dit ving parti To insure thi` automatic tightness :it thc cnd walls of the cylinderA :is descrihcd ahorc. the lett cud pleite t) o|` the casingY 2 is moi- 2 :.lil)r and rcvoluhly arranged aiid cari-ics a.

screw-ihremlcd hose-S which en eag'cs a [ined 'female screw l() in the casiu` 2. Si is suhicctcd to a tur ing n'ionient. (rota ticn moment) in a diiccliioi'i contrary to that'. of the rotation oiI thc en .frine` either hy nieaiis ot `aweight 1l suspended i'roni the Iii-ss Ivor'li): other suitahlc means. Il`hc cut ot thc sci'e\i'-thread on the hoss S so made that in consequence. ot' the turning moment the disk t) is inoied toward the pistcii carrii-r l until it. touches the saine.. lt now the friction inonicnt het wecn the piston drinn l' -and dist: 1) is Jeri-cater than the turning inoinentgcxerciscd h ij the weight 11, the disk t) will he carried along' slightly hy the piston drinn 1, and will then move away owing to its `'uidancc h v a screw thread until the. friction moment and the turning,F moment' are equal. ln other words the amount oll the friction moment can he regulated hy regulating1 the amount ot the turningnio.- inent.

To etl'ect the pressure compensation pre i iousjly referred to`, a channel 12 situated :it

a convenient point, as nea :is possihlc to the cell having' the smallest iolunie, hetwcen the suction and expulsion ports. extends into the interior ot the cylinder. One end of a Apipe 1? is att-ached 'to the said channel '12 and the other end to a.' channel 1=l which also leads into the interior oi' the cylinder at. a., point behind the suction port. in the dircction of rotation. lin this manner. connection is established het-weon the cells 15 vwhich have justexpelled their contents and contain air at the expulsion' pressure and cells 16, wherein there exists a pressure which is only slightly' greater than the suction pressure'. ln other Words, a tlow of air troni the cells l5 into the cells 'l'will take place, wherever there is a difference in 'pressure between the two cells. The pipe 13, for which may he sulistituted a connection channel in the cylinder wall, is conveniently pro- A`vided with a cock i. to' enable the pressure compensation to he regulated as desired. uunihcr o'f such conduits 12, 13 and 14; may he priividi-d so that each cell 15 :i t'ter having lci't the expulsion channel will first he connected with a. ecll 1.(3 in whichl a n'ioderate coniiiressioi'i has :ilrcai'ly taken place, and so that cn further irotatioli the said cell 15 The disk will .he connected with a cell A1h which is 'said drum and`movuble radially thereof,

porting rings when the drum is rotated, the Wall thereof, a drum eceentrically mounted supporting 'rings revolving With the pistons in said cylinder, a plurality of pistons upon alnd ctounteructing the centrifugal force i t iereo In witness whereof vWe have hereunto signed our naines this *24th day of March 1910, in the presence of two subscribing wit- 20 ing circumferential grooves in the interior supporting rings of approximately the saine internal diameter as the cylinder-bore, located in said grooves in the cylinder' and having play perpendciilur to the longitudinesses.

nal axisof the cylinder, and means conneet- KARL WITTIG. ing said pistons to said rings, whereby the l EMIL WITTIG. outer ends of the rzidial pistons ma beur t Witnesses:

tightly but GEO. GIFFORD,

With dierent degrees o presl y AMAND Rri'rnn.

snre against both the cylinderland the sup-

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