US1444440A - Rotary compressor - Google Patents

Description

E. WILSON. ROTARY COMPRESSOR.

Feb 6, 1923.,

3 SHEET -SHEET1.

FILED FEB-27,1920.

Feb; 6, 1923. L l i-4AM) E. WILSON.

ROTARY COMPRESSOR.

FILED FEB-27.1920. 3 SHEETS-SHEET 2.

Patented Feh. (5, 1223.. I

UNHTED STATES EDWARD WILSON, OF ST.

LOUIS, MISSOURI, ASSIGNOR OF (ENE-HALE TO WTLELLTAIE EIIORGAN, 015 ST. LOUIS, IREISSQUEI.

ROTARY COMPRESSQE.

Application filed. February 27, 1920. Serial No. 361,395

To all whom it may concern."

Be it known that I, EDWARD VILSON, a citizen of the United States of America, and a resident of the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Rotary Compres sors, of which'the following is a specification containing a full. clear, and exact description, reference being had to the accompanying drawings, forming a part thereof. My invention relates to improvements in rotary compressors, and has for its primary object the construction of a rotary compressor wherein the rotating cylinder has a central self alining bearing secured to its outside periphery, and which cylinder and bearing are eccentrically mounted in regard to the casing and the rotor.

A further object is to construct a rotor 29 piston which is designed principally for a IOtary. compressor which is hingedly connected to the rotor and held against the cyl inder by the combined action of centrifugal force and the pressure set up in the cylinder when the compressor is placed in operation.

In the drawings:

. Fig. 1 is a vertical longitudinal section of a compressor embodying my device;

Fig. 2 a cross sectional View of the cylinder showing the rotor and rotor piston in position with parts thereof broken away and y in section;

Fig. 3 an end view of the rotor;

Fig. 4 a fragmental perspective View of the rotor piston;

Fig. 5 a fragmental perspective of the hinge member for connecting the rotor piston to the rotor.

Fig. 6 is a vertical cross section taken through the housing 6 through the ring 13 and bearing 14 showing the cylinder in end elevation. Fig. 7 is an end view of the housing 6, showing the adjusting spring 45 and the spring tensioning pin in position.

Fig. 8 is a fragmental view of a portion of the housing 6, showing the manner of securing the spring tensioning pin therein.

In the construction of my device I make 50 use of the two piece housing 6 and 6 This housing is provided with the inlet port 7 and the outlet port 8 and the stufiing boxes 9 and 10. Approximately midway the length of the stufiing boxes is formed an 65 enlargement 11. which is provided with an eccentric internal bore 12, into which the eccentric ring 13 is placed. Within this eccentric ring is mounted a self alining ball bearing ltwhich in turn is secured on the outside of the cylinder 15 by means of the flange 16 and the nut 17.

Within the cylinder is located the rotor 18, this rotor being eccentrically mounted in the cylinder as is clearly illustrated in Fig. 2. The rotor is provided on both of its ends with a rib 19. This rib is designed to contact with the floating cylinder heads 20 which are held against this rib by the pressure setup within the casing 11, and are held sulhciently tight against the rotor by this pressure to prevent leakage from the cylinder through its ends adjacent the cylinder heads. in the outer face of the rotor is formed a recess21, this recess having one portion terminating in a cylindrical recess or socket 22, which recess is open adjacent the recess 21 as indicated by the numeral 23. Within this recess 22 is inserted the cylindrical portion 24: of the hinge member 25. This hinge member is inserted from one end of the cylinder and when in place cannot be removed from the recess 22 except by longitudinal movement.

On the end of the hinge member 25 opposite the cylindrical end 24 is formed another cylindrical end 26 whichis adapted in be seated in the recess or socket 27 formed in the piston shoe 28. This shoe has the outer curved surface 29 and a forward angular face 30.

Secured to or formed integral with the rotor 18 is a shaft 31, and formed through the shaft 31 and through the rotor is a bore 32. Connecting this bore 32 with the outside periphery of the rotor is an opening 33 which opens into a chamber at the rear of the piston. This chamber is crescent shape in form, and is caused by the differ-- ence in diameter of the rotor and cylinder and by the eccentricmounting of the two.

When the rotor is in the position as shown in Fig. 2, a passageway 35 is formed be tween theshoe 28 and the bottom of the re cess 21, and extending from the bottom of this recess into the rotor is a bore 36 in which a check valve'37 is mounted, the bore 36 connecting the longitudinal bore 38 which extends parallel to the bore 32 and opens on both sides of the rotor into the space 39, and. from thence into the casing 11.,

The portions 6 and 6 are secured together by means of a ring 40. The portion 6 being provided with a projecting circular tongue 41 which fits into the groove formed 1n the portion 6 and is for the purpose of preventing leakage, or in other words, make an air-tight joint. The eccen- A in Fig. 2, while the cylinder revolves in the direction: shown by the arrow B, Fig. 2. When sufficient speed has been attained, the centrifugal force will have a tendency to throw the shoe 28 outward against the inner face of the cylinder 15. The cylinder 15 is at the same time revolving due to the rolling contact between the rotor and the cylinder, and as this rotation continues, the gas ahead of the rotorblade is gradually compressed and forced through the valve 37into the bore 38, and thence into the casing 11. This action will continue until bymeans of the eccentric mounting of the rotor and cylinder the shoe 28 is gradually forced completely into the rotor. This will be at the point of contact between the rotor and cylinder.

' inder surface.

After this point of contact has been passed, the centrifugal force will tend to force the shoe and hinge member 25 outwardly and maintain a very close contact with the cyl- This contact increases as the pressure against the face 30 of the shoe and hinge member increases, so that the greater the pressure ahead of the shoe the tighter the shoe will be forced against the cylinder walls and leakage prevented.

In an application filed by me, May 7, 1918, Serial No. 233,040, I have claimed broadly- A- housing, a compression cylinder, a rotor eccentrically mounted therein, a rotor piston carried by said rotor, means for adjusting said compression cylinder towards the rotor and at right angles to the axis of.

rotation of said rotor, also floating heads for the cylinder, said floating heads being held in fluid contact with the ends of the rotor by gas pressure within the housing.

casing, a se f alining ball bearing eccentrically mounted in said casing, a compression cylinder secured within said self alining bearing. and concentric therewith, a

rotor eccentrically mounted within the compression cylinder, a floating head located in each end of the compression cylinder and contacting with the rotor, a piston hingedly connected to said rotor, its outer end'adapted to contact with the inner. face of the compression cylinder, a recess formed in the rotor, said recess adapted to receive the piston-so that the same may be wholly contained Within the rotor at one point of its 'revolution.

2. A rotary air compressor comprising a casing, a self alining ball bearing eccentrically mounted in said casing, a compres- ,sion cylinder secured within said self alining bearing and concentric therewith, a rotor eccentrically mounted within the compression cylinder, a floating head located in each end of the compression cylinder and contacting with the rotor, a shoe adapted to contact with the inner face of the compression cylinder, a socket formed in said shoe, a hinge member, cylindrical enlargements formed on two of the parallel edges, one of said cylindrical enlargements adapted to be inserted in the socket formed in the shoe, a longitudinal recess formed in the rotor, a socket formed in one edge of the recess, said socket adapted to receive the other cylindrical enlargement formed on the hinge member, said hinge and shoe when so mounted being capable ofcontacting with the inner face of the compression cylinder, or being folded within the longitudinal recess.

3. In a rotary air compressor, a sectional casing, a compression cylinder mounted within said casing, a rotor eccentrically mounted in said compression cylinder, floating heads 'for said cylinder, a self alining ball bearing mounted in the casing and central of the compression cylinder, and an eccentric ring mountedin the casing and around the ball bearing for adjusting the compression cylinder to aiid' from the rotor.

- In testimony whereof I have signed my name to this specification.

' EDWARD WILSON.

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