US918906A - Rotary pump or motor. - Google Patents

Description

H. A. POPPENHUSEN & JPHARRINGTON.

ROTARY PUMP 0R MOTOR.

APPLIoATIoN FILED Nov. 11, 190s.

Patented Apr.20, 1909.

3 SHEETS-SHEET 1.

ROTARY PUMP 0R MOTOR.

APPLIGATION FILED Nov.11, 190s.

Patented Apr. 20, 1909.`

3 SHEETS-SHEET 2.

b-@W- v Q9 Y die@ A. POPPENHUSEN & J. HARRINGTON.

ROTARY PUMP 0R MOTOR. APPLIoATIoN FILED Nov. 11, 190s.

Patented Apr. 20, 1909.

3 sums-s112111' a.

l' To all whomt may -conc-ern:

CHICAGO, AND, JOSEPH HARRINGTON, or RIVERSIDE," Y,

' ILLINOIS. j

Ro'ran Pinar cameron.

Speifl'eaon of-Letters Patient.

vInvented April 20,1909.

Application med November 1'1, 190s'. swarm. 462,072.

Be it known that we, HERMAN A. PQPPEN- lIIUsEN and JOSEPH HARRINGTON, citizens of the United States, and residents ofChicago and Riverside, res actively,- in the county of Cook and State of llinois, have invented certain new and useful Improvements in Rotary Pumps or Motors; and we do hereby declare l that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

' This Invention relates to improvements in rotary (pumps or motors of that type having a cylin ric casin and a rotary piston eccentrically mounte in s-aid casing and having contact at one side with the interior'cylindric nsurface of the casing'cornbined with radially movable abutments which bear at their inner ends against the rotative piston and which slide in slots in the cylinder Wall; said abut- Jments'serving to divide the interior of the casing into a plurality of chambers each of which is alternately enlarged and lessened in'4 interiorcapacity in the rotative movement of the eccentric piston.

'partial side elevation an The invention relates more'speciically to valve mechanism for controlling the admission of fluid to the pump cylinder and embraces also other features of improvements in apparatus yof this type which will hereinafter more fully appear.

The improvementsconstituting our invention are more particularly ap licable to pumps or compressors employe for compressing air or gases, and the apparatus illustrated in the accomplanying drawings is dei signed for use as suc a compressor.

' As shown in the drawin sz-Figure 1 is a partial vertical `section of a pump or compressor' made in ac- I l on thelline 343 of Fig. ,1l

cordance with our invention. Fig, 2 is a transveise section thereof, the sections of the f several parts being taken indifferent transverse planes. Fig. 3 isa detail section taken l Fig. 4 is an end piston, showing one end lview* of the rotatin lgiich latter is arranged to wall and flange, W

constitute part ofthe inlet valve mechanism.

Fi 5 is an inner face view of one-of the cy inder heads. Fig. 6 is a section taken on line 6-6 of Fig. 2.

AAs shown in the drawings, 10 designates a horizontally arrangedlcasing'or pump cylin- .the length of the latter.

derl which is supported on legs or standards 11,11. A

12, 12 designate the end plates or heads of the cylinder which arefastened to flanges 13 of the cylinder by bolts 14. For convenience of manufacture, the cylinder is made of uppervand lower parts joined on a horizontal plane, as clearly shown in Fig. 2 5 the connection of the ends or heads 12 with the two partsof the cylinder serving to rigidly unide the two cylinder members. u

15 designates a rotary piston within the cylinder. Said piston is of cylindric form. and is aiiixed eccentrically to a horizontal shaft 16, that extends outwardly through the cylinder heads and has bearing in elongated bearings or hubs 17 onsaid heads. Said shaftis rotatively mounted vatits ends in bearings supported by standards 18, 18. 'lh'e shaft is provided kat one end with a dr1ve wheel or pulFey 19 and at it's other end with a ily Wheel 20, the said wheel and pulley being llocated inside the standards 18, 18. The eccentric aran ement of the rotative istn 15 within the cy inder gives contact o the part of the piston having greatest eccentricity with'. the inner surface of the cylinder wall, along a line arallel ywith te axis of the cylinder and t e piston is provided with -any suitable packing means, as the longitudinal packing strips 21, adjacent to and parallel with said line of contact, to afford an air tight jointbetween the piston and cylinder along this line.

' 22, 22 designate radially arranged slidlng abutments which bear ,at their inner' ends with anair tight fit against the cyllndrlc' surface of the rotative piston, throu hout The said siding' abutments 22 extend outwardly through longitudinal slots in the cylinder wall, In' which slots they radially slide. As shownl In the accompanying ldrawings, the slots in which said abutments slide are formed between tlie upper and lower members or halves ofthe cylinder, and the cylinder wall ris provided above and below the. slots with longitudinal; ,packing strips 234 which bear upon the upper and l'owervfaces-of the abutments to provide air and gas tight ]ou1ts between said parts and thereby., prevent thej p escape of air or gas from one chamber or compartment of the cylinder to another. The' up er and lower members of the cylinfder shel are vprovided at the ends thereof l with vupper and lower lugs 24, 24' as most chambers, yas common clearly shown in Figs. 1, 2 and-3, which constitute elongated guides for the sliding abutments and increase the area of the bearing between said abutments and the cylinder structure. Said lugs are joined outside of the ends of' the abutments by bolts 25 which constitute additional means for fastening the two parts or members of the cylinder together. The said abutments 22 divideV the cylinder into two separate compressing in pumps or com pressors of this type, each space serving alternately as a com ressing chamber and an inlet chamber. ach end wall of the cylinder is provided with -two inlet orts 29, 29, the two ports in each end wal or head being located adjacent to one of the abutments, andone being located above and the other below its associated abutment. Each chamber or compartment of the cylinder thus formed is provided with an exit or delivery port 30, located each adjacent to one of the' abutments, one of the exit orts being located at one side of its associated abutment and the other at the o posite side of its associated abutment. T le said exit-ports are controlled by spring actuated back-pressure valves, designated as a whole by 31, which pressed air or gas delivered om the pump is carried away through pipes 32, 32 connected may be of any preferred type, and the comf` y with the cylinder by said back pressure valves.

' ing piston.

The rotating piston is provided at its ends with circular flanges 35, 35 themargins of which are' concentric with the axisof the cylinder and therefore eccentric to the rotat- The said flanges 35 fit or bear against the inner faces of the heads 12,12 of the cylinder, as shownin Fi s. 1, 3 and 6,- and the end margins ofthe sli ing abutments fit or bear against the inner faces of said flanges. @Each of said piston flanges is provided for a distance around its peripheral margin with a pluralityof radially arranged ports 37 separated by radially extending prongs .or teeth 38, 38 on the flanges.` The two lseries of ports 37 in the two flanges are located on corresponding sides of the piston..

Each series of ports extends substantiallyv throughout the angular lor circumferential dimension of the chambers'formed by and between the sliding abutments.y When two/ abutmentsV are employed, said ports extend throu-gh substantially one-half of the circumference of the flanges, 'that is to say, from a point near the line along which the piston has bearing against the lcylinder wall, to a point diametrically opposite said be'ar-C u'ng line.. The several ports 37 are made of equal radial length,vand of the same length .as the admission port 29 except in the part 'of the flange at which the distance between the piston and periphery ofthe flange is less than the radial dimension of the stationary .width ofthe flange.

port 29, so that in the narrower part of the ange, lthe ports 37 are cut through the full The unnotchedor solid portion 39 of each piston flange constitutes a valve closure which covers the admission port 29 at one side of the c linder while the notched portion p of said flange is passing over the admission port 29 at the other side of the cylinder.

Durin the rotation of the piston and its flanges t e ports 37 in both flanges are carried successively over two of the ports 29 of the cylinder heads and when any one of the ports 37 in the valve flange is opposite one of the ports 29 air passes freely into the interior of the cylinder. By reason of the close spacing of the ports 37, practically continuous inlet port openingsare provided at the ends ofthe cylinder, on one side of the piston, during vthe time said ports 37 are passing the stationary ports 29, the inlet of vair bein only interrupted by the passage of the soli portion or teeth 38 of said flanges which latter are preferablymade narrower than the stationary ports 29. The said ports 37 of the valve flanges of the piston are made narrower than end bearing faces of the abutments 22, so that during the time a given port is passing the end bearing faceof said bearing face covers or bridges the The ,result of making the end bearing of said abutments 22 of a width greater than the width of oneof the ports 37, is to revent the back passa e of air from the c amber compartment o the cylinder'into which air is being admission ports 29 to the other chamber or com artment, the admission ports 29 of' port. ILCCS 'whic latter are at this time covered by the solid arts 39 of the iston valve flanges.

evice is rovi ed which acts on the outer edges of t e sliding abutments to hold the same yieldingly a while permitting said a utments to slide inwardly and outwardly in unison,- one of the abutments being arranged` to slide outwardly while the other abutment slides inwardly, The means herein shown for this lpurpose consists of a reciprocating frame aving parts -which arey connected with the abutments at the opposite sides of the cylinder and connecting parts which extend transversely across the cylinder from oneI side of the com ressor to the other. As herein shown sai frame comprises vertical barsl A.42, 42 arranged in pairs at each side of the plump, one at each end thereof, and horizontal connectingV rods 43, 43 extending transversely between and connecting the upper and lower ends of said bars arranged a ove and below thel cylinder. The said bars 42, 42 press at-theirlongitudinal cen- -tral portions against the ends .of the abutments 26. herein shown, the said bars either abutment, the

admitted through one pair of the ainst the cylinder,-

the width of the carry near their longitudinal centers bearing lates 45 which are attachedv to the bars by olts46 or otherwise and are provided with 'horizontal slots or grooves which receive' the` outer edges of the abutments. The connection between the cross rods 43 and the vertical bars 42 of said frame isa resilient conj nection whereby the abutments are pressed rods.

yieldingly against the piston. As herein shown said yielding connection is afforded by coiled springs 47, 47 which surround said ,rods 43 at one side of the frame and are interposed between the outer faces of the `adjacent bars 42 and nuts 48 which are screwthreaded to the -ends of said rods. The other ends .of the rods are provided with .nuts 49 which have screw-threaded engageingly holds both vabutments against the z past the peripheries of the clearly shown inFigs.` 1 and 6.l

' flanges have pistons. j n

1n order to provide against leakage of air iston valve flangesl 35, the said flanges are 'tted into annular grooves or rabbets- 50 formed at the ends of the cylinder wall between the cylinder wall of the cylinder and the end.l walls thereof; said anges extending beyond the inner cylindric surface of the cylinder, as

In thel operation of the pump or compressor described air is admitted to one side ofthe piston between one of the abutments and the line of contact of the piston with the cylinder, practically continuously during the time the ports 37 of the piston valve fiange are moving past one pair of the stationary admission ports 29; the duration of the inlet period being substantially-equal to the period in which the piston makes a half rotation. During the time air is thus' admitted to one side of the iston, the air previously admitted to the ot er side of the piston'is being compressed between the abutment located adjacent to the closed Vadmission ports 29 and the side of the piston which is inl contact with the cylinder, and the air Athus com ressedis forced out of the cylinder through t e valved exit port 30 adjacent to said latter abutment, into a suitable receiver with which the pipe 32 connects. Afterv the last or trailing ports 37l of the piston valve kassed the admission ports 29, through whic air has been admitted to one side of the piston,the solid portions 39, 39 of the pistons cover said latter Orts, and in the continued rotation of the plston, the air admitted to this side of the piston is compressed and forced out of Vthe exhaust'port 30. Immediately after the trailing ports of the series of ports 37 have passed the admission ports .29 at one side ofthe cylinder,

through which air has just been admitted to the cylinder, the leading ports of said series are brought into alinement with the admission ports 29 at the other side of the cylinder, and during the continued rotation ofthe piston and while the air is being compressed on the other side of the iston, air is admitted to that side of the cy inder through which communication has been opened through the admission ports 29 and the series'of ports 37. S0

The rotative piston having end flanges provided each withA a series of ports, which ports are severally narrower circumferentially than the end bearing faces of the sliding abutments in contactwith said flanges, affords a simple compact and efficient valve device for admitting air to the cylinder, arranged so that air may be admitted to the cylinder during practically the entire inlet movement of the piston. This construction avoids the use of complicated movable valve parts and actuating means therefor, such as vhave heretofore been used for thislpurpcse. The essential features of the valve mechanism are formed on rigid parts of the structure, and,

being made of few parts, gives slight liability to derangement of the parts.

The cylinder wall andpiston are "water cooled and we have herein shown a simple and efficient means for leading the cooling water or fluid to the parts to be thus cooled,

as will now be described. The two parts or shells of the cylinder are provided with water spaces 55 each of which is provided at one -point with an inlet opening connected with -an inlet pipef56 and at another point with an outlet opening communicating with an outlet I pipe 57. The piston is made hollow, comprising a sleeve portion 59 and a hollow portion divided'into a plurality of spaces 60 by radial partitions 61, 61. The features of construction employed for admitting a coolingliquid to the moving piston through the stationary cylinder are made andarranged as follows: The cooling liquid is admitted to the piston through one of the heads of the cylinder through the medium of an inlet pipe 58 at a lpoint below the engine shaft and is discharged therefrom through the other head of the cylinderand an outlet pipe 62 located above said shaft. The inlet pipe communicates through an opening in lthe cylinder head with anv annular groove 63 on the inner face of the adjacent cylinder head which 1s located in alinement withl'a corresponding annular groove 64 in the outer face of the piston and its valve-Hange, the two o ppo- 25 ments are so arranged that The saidcylinder head is also'provide'd on its inner face with a smaller concentric annular groove 65 which is arranged opposite a like groove 66 formed in .the outer faceor end of the piston. The two grooves 65 and 66 constitute a circular passage which communi- Cates with the outer groove throughcthe mediurn of a plurality of radial passages 68 formed in theouter end face of the piston.

A likearrangement of groovesbetween the stationary head and the movable piston at the other end of the cylinder is provided, the

. outlet pipe 62 communicating with the outer annular passage. The inner 4or smaller passage at the inlet side of the device communicates through ashort passage 70 in one end of the piston wall with one of the hollow spaces 60 at one side 'of the hollow piston. At the other end of the piston a like passage 70 connects another of the spaces 60 at the other side of the piston with the circular and radial passages which lead to the outlet ipe 62. The partitions which divide the ho o w piston into a chamber of separate compartthe cooling water or liquid passes through the compartments of the hollow pistonin a tortuous path, thus distributing the cooling liquid more uniformly over the heated surfaces ofthe piston. shown in the accompanying drawings, each of the artitions 60 is provided at one end with a s ot or opening, as shown at 72 Fig. 6, to afford communication from one compartment of the hollow piston to the other.` The openings or slots of the several partitionsarearranged alternately at opposite ends of the cylinder, so that the cooling liquid `willfpass endwise through the spaces between the partitions. By an arrangement 40 ofthe space or passage between the end of the piston and the cylinder head, such as is shown by which said passage covers or em-I braces a substantial portion of the areas of said parts the cooling medium vcirculated therethrough-'seems to abstract the heat from the said end of the piston and the cylinder head, as well as from the cylindric wall of the hollow istn. l 1

We c aim as our-inventionz- 1. The combination of a cylinder provided with exit ports and in its head with admission ports, an eccentric rotary inder provided at its end with a flange bearing against the inner -face of the cylinder head, said flange being provided with a cir- 'cumferentially arranged series of ports adapted to pass over the'cylinder inlet ports, and sliding abutments extending through the side wall of the cylinder and bearing at their inner margins against the piston and at theirends against said flange, the end bearing surfaces' of said abutments being made of a width l greater than the Width of the. ports in said ange. 'i

ports arranged to the cylinder and provided at its end gplston, comprisin opposin piston in said cyl-f 2. The combinationof a cylinder provided with exit ports and in its head with inlet ports, an eccentric, rotary piston provided at its end with a flange bearing against the inner face ofthe cylinder head, said flange having a circumferentially arranged series of pass over the cylinder inlet ports, sliding abutments extending through bearing at their inner margins against the pistonand at their ends against said flange, said abutments having end bearing faces of greater width than the width of the ports in the flange, and the said ports occupying a part of the circumference ofthe flange substantially equal to the angular spaces between the sliding abutments.

3. The combination of a cylinder provided with exit ports and in its head with inlet ports, an eccentric rotary piston provided at its end with ay flange bearing against the inner face of the cylinder head, said flange being concentric with the cylinder and adapted to cover the inner face of the cylinder head and provided in its margin with a series of radial notches constituting inlet ports, sliding abutments extending through the cylinder and bearing at their inner margins against the piston and at their' ends against said flange, the end bearing face of said abutments being of reater width than the width of the said note ies.

4. The combination of a cylinder providedl with exit ports and in its head with inlet ports, an eccentric piston in thev cylinder, with a flange bearing against the inner face of the cylinder head, and provided with a circumferentially extending series of the inlet ports, and sliding abutments extending through the cylinder and bearing at their inner margins against the piston and at their ends against said flange, said flange beports arranged to pass over in larger 1n' diameter than the bore o'f the cy inder andthe latter having an annular groove to receive the margin of said flange. 5. The combination with a cylinder and a rotative, -eccentric piston therein provided with a flat end adapted to bear against the inner flat face of the cylinder head, said pistonV being hollow, of means for su cooling liquid. to the interior of t e hollow circular grooves on the adjacent aces of t 1e cylinder head and piston arranged to provide an annular passage between the same, said piston being provided witha passage which affords communication between said annular passage and the interior of the piston.

6. The combination with a cylinder and rotative, eccentric piston therein provided with flat ends adapted to bear against the piston being made hollow, of means for su ply/ing a cooling liquid to the interior of tie ollow piston and discharging the same therefrom comprising opposing circular grooves-in ,inner flat faces of the' cylinder head, said plying a i aragon a i the adjacent facesiof'the cylinder heads and iston, arranged to provide annular passages etween the s ame, said piston bein provided m its ends wlth passages'which a ord com- 5 munication between said annular passages an'd the interior of the piston,'at the ends nf the same, and supply and discharge passages connected with the said annular passages.

.20 communication 7.' VThe combination with 'a cylinder and a 1 0 rotative, eccentric piston therein provided withvat'ends ada ted to bear against the inner fiat faces of t e cylinder head, said piston being made hollow, ofmeans for supplyfdin' la cooling liquid to the interior ofthe 15'ho ow piston, comprising 'opposing circular grooves on the adjacent faces or the cylinder heads and piston, arranged to provide annular passages between the same,

being provldedwith passages which aiord said piston between said annular pas-k sages and the interior of the piston, the hollow piston being pr vided with a series of radial partitions foryzing a plurality of compartments therein and'said partitions being provided with openings aording communication between the compartments, theopenings in the partitions being arranged out of HERMAN A. POPPENHUSEN.A

JOSEPH HARRINGTON. Witnesses:

y Gr: RLWILKINS,l -D. EL MARMON.

. 30 In testimony that we claim the foregoing f

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