US1271729A - Compressor. - Google Patents

Description

L. F. KRISTUFEK.

COMPRESSOR.

APPLICATION FILED Dic.19, 1913.

L. F. KRISTUFEK.

COMPRESSOR. APPLICATION FLED DEC. 19. 1913.

Patented July. 9

s SHEETS-SHEET 2.

L. F. KRISTUFEK. I

COMPRESSOR,

APPLICATION FILED DEC. I9. I9I3.

1 ,271,729. Patented July 9, 1918.

COMPRESSOR.

Larmes.

new and useful' Improvements ,in Compressors;vand I do herebyl declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of thisspecication.

This invention relates to rotary piston compressors and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

To produce a lcompressor of the rotary piston type,I which is efficient and capable of compressing fluid to the desired pressure to be of `real -commercial use, is the object of my invention. I attain this end in rotary piston compressors by providing certain leakage preventing packing means between the movable andstationary parts of the compressor. To assist in the further eiciency of compressors of the above type, it is advantageous in addition to the packing means before mentioned to construct the compressor so that the pressure of the fluid operated upon is raised in stages and to so raise the pressure, I'provide a succession of cylindrical compression chambers of diminishing volumes, each chamber having a rotary piston therein, so arranged that the piston in each .successive compression chamber will have about the same difference in pressure to work. against as its predecessor thus decreasing the tendency toward leakage around the pistons.

In the drawings:

Figure 1 represents a longitudinal vertical section through an air compressor made in accordance with my invention.

F ig.l 2 represents a transverse vertical section through the same, the said section being taken in a plane indicated by the line 2 2 of Fig. 1.

Figs. 3. and 4.ar`e views similar to Fig. 2, the planes of the sections being indicated by vlines 3- 3 vand 4 4 respectively of Fig. l. j

Fig. .5 isa plan sectional view through the air compressor, the planel of the section beingtaken on line 5 501" Fig'. 1.

Fig.4 6' is a detail sectional view, the plane Specification of Letters Patent.

LADISLAV F. KRISTUFEK, OE CHICAGO, ILLINOIS.

of the section being taken in a plane indicated by the line 6 6 of Fig. 3.

Fig. 7 is a detail sectional view, the plane of said section being indicated by the line 7 7 of Fig. 4.

Patented July 9, 319118.,

Application led December 19, 1913. Serial No. 807,600.

the casing 11 through the division wall 13 x and into suitable threaded apertures in the peripheral wall of the casing member 10. 15 indicates a division wall or plate separating the casings 11 and l2. 'Ihe casing 12 is provided'with an end plate or wall 16, said casings 11 and 12 and the plates or walls 15 and 16 having bosses adapted to receive screws or bolts which serve to secure said casings and plates in proper relation.

In the lower part of each casing membery 10, 11 and 12 are formed cylindrical compression chambers 10a, 11a and 12a respectively. All of said chambers have their central axes coincident and each is separated from the upper partl of each casing by annular walls 10b, 11b and 12", said annular walls forming parts 'of the respective casings.

The respective casings above each compression chamber. are divided by means of partition walls 10, 11c and 12c into inlet and outlet compartments 10d, 10/5, 11d, 11?

and 12d and 12e respectively. The casing 10 is provided with a plate or end wall'17 and the inlet compartment 10d of said casing is in communication with the atmosphere, or with any other source of Huid to be compressed through an aperture 18 formed in the wall of the casing 10. Said aperture'is provided with a screen 18a to prevent the admittance of any foreign substance into the interior 'of the inlet compartment 10d. The outletcompartment 12e of the casing 12 has threaded thereinto a discharge -pipe 19 for conveying the air or other Huid under pressure to a source of use.

l Each endwall 16 and 17 is provided with an annular boss 16a, 17 a respectively, in

which are formed bearings for a main rotatively driven shaft 20, which shaft passes,

through apertures 13a and 15L respectively, provided therefor in the division plate 13 'between the casings 10 and 11 and in the plate 15 between the casings 11 and 12. The said shaft has its axis coincident with the central axis of the several compression chamber-S10a 1 1a and 12a.

Within each of the cylindrical compression chambers 10a, 11a and 12a are located eccentric members 21, 22 and 23, said eccentrics being keyed to the shaft 20 to rotate therewith. The eccentrics 22, 23 are arranged on the shaft 20 with their points of greatest eccentricity separated by an approximate 'angle of 180 degrees from the eccentric 21,1 ranged to support and operate annular piston members 211, 25 and 26 respectively.

rl`he construction arrangement and proportion of the parts is such that the rotation of the shaft 2() and of the eccentrics fixed thereto will cause the pistons 2&1, 25, 26to 'roll upon the inner peripheral walls of their respective chambers and thus act to compress the fluid in a familiar manner,

The detail construction of the various piston members and their associated parts in each casing is the same, Vthe only dierence being in the size of the parts therein con- 'bers 21a and 21a apart so as to hold their outer parts in close contact with the division wall 13 and the en d wall 17 of the casing Y 10 and thus prevent leakage about the shaft where it extends through said walls. This construction'galso acts to compensate for the expansion of the parts under the heat of friction.

The piston 24 mounted in and operated by the eccentric 21 is reducedfin diameter in a part of its periphery as indicated at 24a in which part are provided longitudinally extending cylindrical bearing grooves 24 which open through the periphery of the piston by means of slots 24 of less Width than the diameter of said cylindric grooves.

Mounted in said slots 211 and capable of an oscillatory movement therein are Contact shoes 27. Each of said shoes comprises a cylindric head part 27Al which has bearing relation within the associated groove 24 in a manner preventing displacementvyet allow- The said eccentrics are ar-` surfaces. 1

It is apparent from the foregoing description that as the piston moves within the compression chamber 10, each shoe 27 will come into successive engagement with the' cylin;

drical wall of the chamber 10 and will oscillate in the plane of rotation of the piston about the head 27a as a pivot, under theaction of the Huid undergoing 'compression which enters the spaces between the forward ends of the shoes and the periphery of the piston members carrying them, thus providing a packing between the piston and chamber wall that will effectively hold the fluid under pressure and will adjust itself to accommodate for any wear on-the contacting rlhe annular piston member 211 is provided with an integral, radially extending blade ,23 which has sliding bearing in a slot 29' formed in an oscillating cylindrical bearing member 30. r1`he said member 30 is of. a length greater than the distance between the end wall 17 and the wall 13, said walls being provided with annular recesses '17b and 13", in which the ends of said member have bearing. The said bearing member 30 also, has bearing in the wall 10c that separatesthe compression chamber 10a from the inlet and outlet compartments 10d and 10e. rllhe bear-' ing member 30 is provided inthe slot thereof with a packing gland 31 which prevents leakage of air through said slot.

The blade 28 is provided in its lateral edges with grooves 28a, 28a extending the full length of the blade. ln each groove 28a and 28il are packing bars of'metal or other suitable material 32, 32. 33,' 33 indicate laterally extending, vertically spaced recesses which open outwardly into the grooves 28a, 28a. ln said recesses 33, 33 are loc-,ated spring-controlled pins 34, 34 which act to hold the outer edges of the packing bars 32, 32 in engagement with the walls 17` and 13 and at the same time prevent vertical disi placement of said bars in their respective grooves. rlhis construction prevents leakage of air between the lateral edges. of the blade and the walls 17 and 13 against which they contact. This' construction also compensates for wear of theparts and forthe vexpansion thereofdue to the heat of friction.

40 indicates-'San aperture in thewall 10.

for the passage of huid from the inlet 'compartment 10d to the compression chamber 10a. 41 indicates a similar aperture formed vin said wall 10b for the discharge of fluid 1n the wall 13 is provided an aperture I3,

which aperturecommunicates at one end with the interior of the outlet compartment 10e. ,The aperture 13C at its opposite end registers with a groove l1y formed in the flange' of casing 11 and opening into the inlet compartment 11d of the casing 11. The wall 15 separating the casings 11 and 12 is provided with an aperture 15, one end of said aperture opening into the outlet compartment 11e, the other end opening into the inlet compartment 12d of the casing 12, thus establishing communication between the outlet compartment 11e and the inlet compartment 12d. l

1t is apparent from the foregoing de-` scription that the Huid drawn into the compression chamber 10a is initially compressed therein and is discharged therefrom 'at a predetermined pressure above the initial pressure by means of the piston 24 into the outlet compartment 10e. The fluid thence passes through the aperture 13c in the wall 13 and through the groove 11y formed in the ange of the casing 11, into the inlet chamber 11d of the casing 11 at the same pressure as that at which it leaves the outlet compartment 10". r1`he Huid then leaves the compression chamber 11a to be compressed to a higher pressure and is discharged into the outlet compartment 11 of the casing 11 from which it passes through the aperture 15c in the wall 15 into the inlet compartment 12d of the casing 12 at the same pressure at which it was discharged from the compression chamber 1P. 1n the compression chamber 12B, it is again combpressed whence it will be discharged into the outlet compartment 12e to pass through the pipe 19 on its way to its source ouse.

1n this manner the fluid is compressed in lthe irst compression chamber t9- a predetermined point above its initial pressure, is then compressed in the second chamber to a still higher pressure, and so on successively in the several chambers until the required high pressure is reached.

1t is `possible to compress air'to a high pressure with a small machine of this type, hence a great deal of expense in both the original cost of the machine and the mainltenance of the same is saved.

It will be noted that in my improved construction, a flexible packing is provided between the surface of the piston and the inner peripheral surface of the compression chamber, and in they particular embodiment of the invention shown herein, this 4flexible' packing is applied to the piston. 1t is manifest, however, that the invention is not limited to its application to the piston as it might equally well be applied to the peripheral wall of the compression chamber. While in respect to this feature of the invention as well as in respect to otherfeatures, I have referred to, described and illustrated various details of mechanical Vconstruction and arrangement, it is to.beun derstood that the invention is in no way limited thereby except as pointed out in the appended claims.

While 1 have illustrated and described my invention in connection with a pumping device for compressing gases, for which purpose my invention was more particularly devised, it will be readily understood that the feature of my invention relating to the packing between the piston and the compression-chamber is of utility in a liquid pump, it being my intention by the appended claims to protect my invention-accordingly.

1 claim as myinvention l 1. A compressor comprising a casing providing a cylindrical compression-chamber having an inlet and a discharge, a piston member in said compression-chamber adapted to have orbital movement, means `or orbitally moving said piston member, and means providing packing intermediate'said piston member and the peripheral wallof said compression-chamber comprising aplurality of oscillatory members.

2. A compressor comprising a casing 'providing a cylindrical compression-chamber having an inlet and a discharge, a piston member in said compression chamber adapted to have orbital movement, means for orbitally moving said piston member,` andv means providing packing intermediate said piston member and the peripheral wall .of said compression-chamber comprisinga plu. rality of oscillatory members carried by said iston member.

3. ocompressor comprising a casing promember in said compression chamber adapt'- ed to have orbital movementmeans f ororbitally moving Y said piston member, and means providing packing intermediate said piston member and the peripheral wallof said compression chamber comprising a plul.

rality of members adapted for oscillating movement in the plane of the movement of said piston.

4;. A compressor comprising a casing pro-` viding a cylindrical compression chamber having an inlet and a discharge a piston member in said compression chamber adapted to have orbital movement, means for orbitally moving said piston member, and means providing packing on the surface of said piston member consisting of members carried by said piston member and capable of oscillation in the plane of movement of said piston. f

if). A compressor comprisinga casing providing `a cylindrical compression chamber having aninlet and -a discharge, a piston member in said 'compression chamber adapted to have orbital movement, ,means for orbitally moving said piston member, and packing between said piston member and the peripheral wall of said compression chamber comprising members pivoted on said piston member with spaces between the latter'. and the forward ends of said members open to the interior of said chamber, whereby the fluid, while undergoing compression, operates against said members and holds them in contact with the peripheral wall ofysaid chamber.

' 6. A compressor comprising a casing providing a cylindrical compression-chamber,

having an inlet and a discharge, a piston member in said compression-chamber adapted to have orbital movement, means for orbitally moving 'said piston member, and

packing between said piston member and.

chamber,I whereby the fluid, while undergoing compression, operates against said last-named members and holds them in contactk with the peripheral wall of said cham.- ber.

Intestimony, that I claim the foregoing as my invention I aliix my signature in the presence of two Witnesses, this 16th day of December, A. D. 1913. y

LADISLAV F. KRISTUFEK.

Witnesses:

T.` H. ALFREDS, G. R; WILKINS,

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