US2344028A - Compressor - Google Patents

Description

' Much 14, 1944;

C. B. CURRY COMPRESSOR Filed Sept. 4. 1941 2 Sheets-Sheet 1 Vl .M Il: B. m Fw w. m m 5%, En m A g N l Is: w |\M-| li I @M l N .GPH

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COMPRESSOR Filed sept. 4, 1941' 2 sheets-sheet 2 atenteci Mar.' 14, 1944 UNETED STATES PATENT FFCE CQDIPEESSOB' Y Chester B. Curry, Muncie, Ind. Application September 194,1, Serial No. 409,465 7 claims. (ci. 23o-139) This invention Vrelates to improvements in compressors, and it has special reference to a machine bf this kind which is more particularly' intended for the compressing of refrigerante.

and suitable for household refrigerators wherein Figure 11 is a diagrammatic view showing the i position 'of the cavity at one half of its stroke.

Figure 12 is a diagrammatic .view showing the position of the cavity, at threefourths of its` stroke. i

The power unit is an electric motor, comprising in its structure, the usual eld assembly A To provide improvements resulting in a com- 1 presser which is economical of manufacture and operation,van:lisdurableand dependable, is the object, broadly stated,r of my invention. This generaobject, as well as other and more specic aims, as will presently appear, are accomplished by,\and my invention is embodied in the new construction, combination and arrangement of parts described in the following specication and illustrated in the' accompanying drawings.

'I'he several parts of the invention, are identiiiedby suitable characters of reference applied Figure 3 is a top plan view, in the direction of arrow 3 in Figure 1, portions of the casing being brokenaway.

Figure 4 is a vertical cross section view, taken on the brokenline 1 4, in the direction of arrow IinFigurel.

Fig 'rev 5 is moved. K y y Figure 6 is'an enlarged vertical central longitudinal sectional view, taken on the broken line a perspective /view of thevane, re-I 6 6; in the direction of arrowy 6 in Figure 3, with Y the vane shown in elevation.

Figure I is an end view of the cylinder,

'as seen in the direction of arrow 1 in Figure 6, the arbor member being shown in cross section.

Figure 8 is a view looking downwardly (see ary` row 8) on the structure shown in Figure 6, the

` iixed central member or arbor being shown in elevation, and the parts adjacent thereto 'being shown in cross section.g

. Figure 9v is a diagrammatic view showing the v n position of the crescent shaped working cavity'n (the direction of its travel-being, indicated by the arrow) when it will have arrived at the end oi its stroke. t said cavity through three hundred sixty degrees.

Stroke, meaning, the' travel `of the metal shell I5' provided with spaced internal i lugs |76. The iield assemblydisposedwithin the shell, has its Amagnet'portiorril' seated against.

said lugs I6 and it issecured by cap screws il.A Base block 20 is integrated with said casing shell, .as by cap screws i8. Eachside of said shell embodies a flange provided with machined annular face 22 and with interiorly offset annular seat n.

For clarity, one side of the structure above inf y `dicated, may be referred to as left, and the other, right, assignified by L and RV respectively, in Figy ure 1. :Cross bar 25 has its end portions secured, as by cap screws 26, to the left -hand seat ,23 oi the said casing section I5 (see Figure 1) `and it isprovided with a; central aperture 21 the axis of which is coincident with the axis oi the said field assembly. A closure of the left side of the said casing section I5 consists of a circular plate 29, and sealing gasket `lll secured, as by cap,

screws 3l', to the left hand fade 22 of the said anotheriand similar valve presently to be nien' tioned, is of the known typeand construction as indicated in Figure 6. A closureL plate complemental to said closure plate29, and a cross member complemental to ythe said will be vpresently referred to...

Al member which I designate as anarbor, emy bodies a cylindrical trunk 3l having at its right hand end, a shank 35,l neck 36,'andstem 31; and f at the left hand, the shank 38, neck 39.' and stem 40,. r.Providedin said trunk andbeing oilength extend slightly into the said fshanksfiandx] .f l 38,'is af'fsih'octh longitudinal' radial slot 42.. It is ofdepth slightly greater than the radius ci said.

trunk. In line with the said slot and extending from thebottom thereof, are spaced'recesses 43.

Exhaust duct 64 extends from the bottom of said slot Vand through the arbor. with exit at the left.` In a bore t5 provided in the lneck 31 is a pro- Figure l0 is ya diagrammatic view showing the position of the cavity, at one fourth of its stroke.

tractive coil spring it whichbears against a disk n A machined atbargwhichl A t BI, is of .thickness toiberetained'slidingly in said.

B1 that is seated against apertured plug 48 that Vfrom said `bore 45 is inlet duct 50 which enters` the right hand foi.' the said radial slot 42 at a `point oilsetfirom `the inboard portion of said slot, asvshownin Flgure.

radial riot 42;, andit is ofwidth siightiyiess .than the depth of said slot. The outboardk face 51a designate as a vane of said vane-is slightly rounded in cross section.-` v

` therewith as described. isdisposed with its stem Said vane is provided. atits right hand endpand at a side thereof, with a port 52 which is come` municable with the said inlet duct il and turns at a right angle andthence diagonally upwardly and has its exitfat'jaside of the outboardfac'e Bla of said vane; i

Ports s which extend from the opposite side oi n -said outboardv'tace 5|a,lfcommunicate with the aforesaid exhaust ductY 44 at' the `bottom of 'theLv vane; :Inthe inboard' face of said vane are reftive coil spring's151 seated in the recesses 43 and which extendintothe recesses 5i of the said varie,A urge the vane outwardly, and at the same timethe Y f said vane. is capablelof being pressed inwardly.

greaterl at one side than the other, as indicated in Figure 1. By this feature there is afforded means whereby the area D (see Figure l2) of the cavity, at one side of the partition thereof, is oi decreasing dimensions longitudinally and eircumferentiallyY (producing compressione! augmented increaseof intensity), and at the other the arbor, with the cylinder and rotor combined i140 in'the aperture 21 of `cross bar 25, the rotor assuming its' position concentrically with the ileld assembly. TheY rightframe member 11 is now securedgin place .with its end portions fastened as i by cap screws 19 to the seat 23 of the casing sec- Acylinde'r having borellfof vgreater diameter; y

than'thediameter of.trunk l34 ofthe arbor, em-` bodies annular end portions and '-62 which kare vinwardlybeveled'to constltutecone shaped jourfy ynais -88 and 84 respectively, Vthat are eccentric'to. the axisoi said boro. i Y f i `frire interner boundarytiines no and su of these said :journals will-later'be referred to. The k:

said cylinder is integrated atar, said annular! i,

on the Vsiianir u .of raid arbor, is afring sl pro vided `with al1-annular faceof beveled formation tion I5 '(see Figures l and 3), the stem 31 of the arbor being received in aperture 18 of the said frame member.` By tightening the set screws 80 in A t j the said frame cross members 25 and-11, the arbor cesses'58 whichl are spaced to-register with the.. aforesaid recesses 43 ofthe arbor slot.A il=rotrac'y is xedly secured in its position axially of the Bylthe urge of the springs 51, the vane is held in position constantly urged against the bore of the 'cylinden f Y. 1 Circular casing side plate 82 having a central inlet-port 83 andinteriorly-positioned shallow recess 84 in which is retained a sealing disk 85 of lead orthe like providedwith central aperture, is f now disposed withiits marginal portions in regis- A tration .with the sealing gasket 86 and the right V face 22 of said casing section i5.v ,Upontighteny ingvthecap screws 81, the` said plate is drawn andl secured tofgas tight union with the casingsection and l.the central portion, at the same time,

willliave been drawn and secured to gas tight Union with the stem 31 of the said arbor. Service y valve 88 which is secured to the said plate 82 at the port 83 thereof, is-for control of the gas inlet nozzle 89A.

registrationi'vitnitheend ofr thesaid radial slot l `42 'and it constitutesl a-g'uidewayfor the end p0rtion ovtsaidvane: f .f r l On the other or lefty shank Il ofthe said arbor, and ilush with the vertical:Lface'of. thev latter,

within the oasinestriioturefsuitabie lubricant at a level approximately as indicated by the broken.

line maybe.V had, the bearings atthe Acylinder/.journals and thebearings atf the vane being oil sealed. By .the construction just describedgall koperativeparts lare enclosed within ral gas .tight i casing. 'Refrigerant Vgas is admitted through suitis a ring $5 similar'to theone just describedandv i which constitutes abearing for the journal 64 at the left-hand end ufftliecylinder.l In the bore of.) this ring i9 isia'longitudinalgroove 1l inwhich ir reoeiv'edastud 1 that projects from said shading;L whereby.thisringriwhile held againstk roi tativemovement, is movable longitudinally.

A pressureringlllies against the outer face of rthe said vbearing ring il. *A collar 13is secured. `to'said shank 38 as by a setzscrew 14. :Between thepressure ring andsaid'collar, a protractile sp ',115 is retainedaa'ndritfimctions toholdthe said fringfringnrmly against the faoe vofsriidy .l shank,v .By this arrangement there is permitted aV f i .yielding of the bearlng'ringltin an emergency,

suchas excessive pressure inthecin'npression` por-L y,

tion ofthe. cavityfpresentlyrreferredto. -wiAs willi-r. be'seen in'Flgure. lfand'Figure 4, the boreV 60 of:`

' fsaid-cylinder constitutes the longitudinalwalhandthebearing rings Q5 jand l! l,constitute the endwallsf` enclosing the yoid about Vthe 'arbore trunk 34.`\This void-*or space so closed, iscrescent shaped in cross` section, is designatedas-cavity 16. The planesofthe boundary' lines 63a and 54a .being slightly convergent, the cavity is oi length able yconduit (notshown) at the inlet valve ,88. 1. Operatom-Assume the rotor to. be movingin .K

the directionof. the arrow (see Figure 9). ...The

cylinder, carried as it is, in an orbitvabout the, i .arbor (the axis C of the cylinder being eccentricv tothe arden-A of thearbor, and the bore so ofthe cylinder being tangent to the perimeter of,

the arbor), the cavity 16 is movedy around" the arbor withfeach vrevolution of vthe rotor.

.l In what may be termed a neutral position of the` several parts, as indicated in Figure' 9, the line of tangency ofthe bore of the cylinder and the perimeter ofthearbor, and the line oi.' engagement of the outboard face 51a of the vane`with said bore,-are coincident.

'at Figui-e 1c, tneioavity win haver traveled one'v fourth oi? its stroke andwill have beenpartitionedvby` the vane. At thisphase,vcompression K will have been started :in the exhaust,` portion D of thesad cavity whencethe 'gas content thereof will be exhausted into high side of the system`` when. the exhausting .pressure is equal to or.

greater` thanvis the. pressure atthe high side of Vthe system, (byhiglil side of the system Vbeing meant theinterior of the casing and the con- .75

duits and appliances (not shown) connected with frame member at one side thereof.

asaaoae the discharge valve 32; and by low pressure side of the system, being meant the appliances and conduit (not shown) connected with the inlet valve 88), the refrigerant at inlet port 83 thereby being sucked in. v y

At Figure il the said cavity will have traveled one half of its stroke, portion D decreasing in area, compressing anddischarging proceeding. Portion S increasing in area, taking in more gas.v

At Figure l2 the said cavity will have traveled three fourths of its stroke. At this phase, the portion D is further decreased in area. Cornpression will have become nearly completed; portion S is increased to nearly its maximum area, and the intake will have become nearly complete.

At Figure 9, the cavity will have traveled its full stroke, compression of the cavity content will leave been completed and the content exhausted,

the cavity will have become reiilled with low.

pressure gas or refrigerant. and the vane returned to retracted position.

With each revolution of the rotor, there is repetition of the operation and functioning just described. 1

'Ihe function of the check valve 58 is to prevent theV gas at the `high pressure side from escaping into the low pressure side, at such. time as the machine is ofi cycle. By on cycle, being meant the phase or period when the machine surface of the annularrotor, contributes to norf malcy of temperature ci the moving parts. The

said bearing rings also constitute a guide and support for the outboard portions of the ends,

as well as the medial portions of the ends of the vane during the phase when the vane is in the pushed in or retracted position, and during the phase when the vane is moving. One of said bearing rings, namely ring t9, being yieldable longitudinally, there is no liability of *interrupe tion of operation of the pump, for the reason that any oil or incompressible liquid that might enter the cavityV during the time that the machine is on cycle, is permitted to escape.

Whereas in this application, the several parts comprised in my invention, are described and illustrated in what l consider as their preferred ,Y

forms, it will be understood that minor modications may be made, within the scope of the invention as it is defined in the appended claims, withoutdeparting from the spirit or principle of the invention or sacricingany of its'advander, are concentrlcally integrated with said ropump being one, and the said bearings also constituting the end walls of the cavity; sidewall friction is eliminated and frictional resistance is so minimized that electrical energy is materially conserved. The pump mechanism being directly combined`- with the rotor in the manner as described, the unit so constituted, is capable of being removed and replaced bodily', without having4 to do with the stator other thanremovingthe In case of tor, and are beveled concentrically thereof to constitute cone shaped journals, a cylindrical arbor of diameter less than the bore of the said .cylinder, and which said arbor is supported against rotation 'and coaxially of said rotor and at posi-- tion tangentially of the said cylinder to provide a crescent shaped void thereat. the said arbor being provided with a longitudinal radial slot, there being immediately at a side of said slot an exhaust. duct'leading from theA perimeter of the arbor and having exit at an -end of the arbor.'

and there fbeingfan inlet duct at the other end of the arbor and leading-to the opposite side of said v slot and with its exit at the perimeter of the arnecessity for the removal of the eld'assembly.; I

bor, a vane loose radially in said slot, vmeans to Y yieldingly urge the vane outwardly and vin contact with'the cylinder, and opposed Ibeveled rings spaced upon and fastened tosaid arbor at positions engaged with said cone shaped-journals of. the eccentric endportions of saidk cylinder', thereby closing the ends of` said'cylinder, supporting it for rotativev movement. andlconstituting said void into a crescent cavity. whereby, with each revolution of the rotor and the -moving by vthe cylinder of the cavity around the arbor. the said The parallel planes of the faces of the opposed v bearing rings 65 and 69 bisecting, as they do, the convergent planes of the boundaries 63a and Ela of the cylinder bore--that portion of the cavity nearest the vane 5l thereby being oflessened area both longitudinally and circumferentially,v

cavity will havefbeen exhausted and refilled 2. A machine of the kind described, comprising an electric motor-iield-assembly, an electric rno-v tor rotor, a cylinderembodying annular end portions that areeccentric to lthe axis of the cylin'- der, are concentrically integrated with said rntor, and are beveled concentrically thereof to con..

stitute cone shaped journals, a cylindrical arbor. of diameter.v less thanthe bore of said cylinder, and which said arbor is supported `against rota- Q tion and coaxially of said rotor and at position tangentially of the said cylinder to provide a crescent shaped void thereat, thea said arborbeing provided with a longitudinal radial slot, there `being an exhaust duct from and an inlet duct to said slot. a vane slidable radially in said slot and being provided at a side thereof with a duct c2--` inlet duet of saidanbor.

and extending from 'an end ofv the vane and through the opposite edgeof the outward face o! said vane, means to urge 'the vane outwardly and into contact with the cylinder, and opposed ,A

beveled rings retained on said arbor to constitute bearings for said cone shapediournals and vcle-- sures of the ends of the said cylinder, one of the said rings Abeing xedly secured to, and the other 'oflsaidrings being held non-rotatively on, lbut yieldable longitudinally1 of, the Vsaid arbor. ,l a checkvalve in ther 3.I Same v as claim 2 plus 44A compression machine consisting ofa gas tight casing, an electric 'motor held-assembly, an

outlet service valve at a-sideof said'casing, an' electric motor rotor, a cylinder embodying annular end portions that are eccentric to theaxis drlcai bore, a cylinder embodying annular end portions that are eccentric to the axis of the cylinder, are integrated with'the bore of said rotor,y and are beveled concentrically thereof to con-fvv stitute cone shaped Journals, a cylindrical arbor of diameter less than the bore of saidcylinder, embodyingaxial-extensions, and being provided Awith `aai-longitudinal radial guideway slot, an exhaust duct;L at a sideof said slot leading from thev perimeterjof and through the arbor, an inlet duct leading from an end ofthe arbor and to the opposite side of said slot and having exitat the perimeterk of the' arbor, a vane slidable radially in saidslot, means toyieldingly urge the vane ,outwardly and to contact with said cylinder, op-

posedV ring shaped body membersspaced upon and fastened non-rotatively to said arbor at posiof the cylinder, are concentrically integrated with `,said rotor, andare beveled concentrically thereof. ,i to constitute-cone shaped journals, a cylindrical .arbor of diameter less thantheboreoixthecylinderk andwhich said arbor issupported against rotation and coaxially ofsaid rotor and-'at position tangentially of .the said cylinder to provide a crescent shaped void thereat, the `said arbor be-A ingprovided witha longitudinal radial 'slot and an axial inlet passagew'ayentering the slot at an end ofthelatter, a check-'valve in saidxinlet pasf sageway,jan` exhaust passageway extending from the inboard `zone of said slot andthrough thel j other end portion of, 'said arbor, a vaneofwidth slightly less than the depth of,v and which'is slid-L municable .-withwsaid inlet passageway and hasits able radially in said slot, and is provided at an end v l I and adjacent sidthereof with a'port that is com-k exit ata side oi the routboard face of the said vane, l l

ports in Vthe oppositeside of said vane 'which are communicable,with'the said exhaust passageway andihav etheir exlts'at the opposite side yof the outboardface of said vane, springs' to urge the said vane outwardly and into contact with said cylinder.v opposed beveled'ringsretained on said arbor -and constituting bearings yfor said casing, andya union4 joint interconnectingsaid servivaivewiih the miei end or said arbor, Y 5. A pump assembly for a compression machine A of. th'egskind described, vconsistingfof an electric motorlrotona cylinder embodyingannular end journals of. and closuresoi.' the endsl ofthe slald f cylinder, a servicey valve at the inlet side `,of said portions that are veccentric to the axis of they cylinder, are concentrically integrated with said rotor, andV are beveledconcentrically thereof to con- 'and which is providedv with f axial :extensions f adapted to'be made secure whereby the `arbor is non-rotatively maintained in, positionV coaxially of said rotor and tangentially ofthe said cylinder,-

stitute-cone shaped'iournals, aV cylindrical arbor' vof diameter" less than the bore or said cylinder the said arborV being provided witha longitudinal o a ysideiotsaidslot an eshaust duct leadingfrom 'the other'end of: the'V arbor. and leadingfto the and into contactwith said cylinder, and opposedv ,beveled body rings spaced upon4 and fastened to said arbor at positions engaged with y.the cone shaped journals of the said cylinder; l 6. A pump 'mechanism of the kind described,`

` comprising an electric motor rotor having a cylin.-

' radial guideway slot, there being immediately at guideway slot, means to urge the vane outwardlyH shaped'b'ody 'member to yieldably hold it against tions engaged withsaid cone shaped Journals. one of said'body members being movable longitudinally ot the arbor, and each of said body members being provided with a recess toreceivevslidingly the outboard portion ofan en d of the said vane. and means adjacent tothe movable ring shaped body member to yieldably hold it against the adf the cylinder are closed. the cylinder and rotor are coordinated in free rotative relation to said arbor,

vguideways are constituted for the outboard end U portionsoi' the said vane, and there is yieldability` e of the union of the said body members and the f' said cylinder.` VV

v 'LMA compression machine comprising agastight casing, anVV outlet service valve at a side thereof, anvelectric motor field-assembly secured within the said casing, a support member adjacent the yinterior face of each side wall of the -1 saidicasingnan electric motor rotor, a cylinder embodying annular end portions that are eccen- 7 tric to the. axisoisaid cylinder, are concentricallvi integrated with said rotor, andarebeveled concentrically thereof to constitute cone.shxa.1;ed-y

journals, a cylindrical varbor of diameter less than the bore of said cylinder and lwhich embodies `axial extensions which are received in said support members, meansto secure said extensions in saidfSuD'pOrt members lto hold said arbor lagainst x rotative movement and inposition coaxiallyv of saidrotor, the said arbor beingf provided ,with am Alongitudinal Vradial guideway slot, there being an exhaustduct immediately at `the side of said *i slot and leading from-the perimeter of the arbor and having exit at an end of said arbor, and there beingjan inlet duct at the other end of the arbor and leading to the opposite Iside of said slot and with its exit at the perimeterofthe arbor, a vane slidableradially in said guideway slot means to' hold the vaneyieldingly in contact with the #bore of saidfcylinder, a ringshaped body member fastened knon-rotatively to said'arbor at each end` 'otpthe cylinder to'en'gage the cone shaped journal thereat. one of said body members being movablelongitudinally of the arbor, and `each of said body -members having a recessto receive v`slidinglyjthe outboard portion-of an end of lsaid ,vane, and means adjacent to the movable ring `-the' adjacent cylinder journal,a check valve in

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