US1683182A

US1683182A - Compressor

Info

Publication number: US1683182A
Application number: US238191A
Authority: US
Inventors: Charles L Heisler
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1927-12-06
Filing date: 1927-12-06
Publication date: 1928-09-04
Anticipated expiration: 1945-09-04

Description

Sept. 4, 1928. 1,683,182

c. l.. HElsLER COMPRESSOR Filed Dec, 6, 1927 FI rlx u Inventor: Charles L. Hesler,

His Attorney.

Patented SeptA 4, 1928.

UNITED STATES' PATENT ma...

examinan COMPRESSOR.

Application led December 6, 191W. Serial No. 238,191.'

My invention relates to 'compressors for refrigerating machines and partlcularly to refrigerating machines which are'especially adapted for domestic use. An ob]ect of my invention is to rovide an improved compressoiof this character which is simple 1 n construction', eicient in o eration 'and is relatively free from vibration and nolse.

My invention will be better understood from the following description taken 1n connection with the accompanying drawing, and its scope will be pointed out in the appended claims.

Referring to the drawing, F. 1 1s a sectional view of a machine embodyingmy 1nvention, and Figs. 2 and 3 are detalls thereof drawn to larger scales.

In the drawing I have shown a fragment of a refrigerating machine embodying my improved compressor mounted on the top 1 of, a refrigerator cabinet, through which top extend the inlet and outlet pipes 2 and 3 res ectively for the evaporator, not shown, wit in the cabinet. Arranged on the top 1s the bed plate 4 on which rests the fixed frame 5 which supports the stator 6 of the driving motor and which has a bearing for the drive shaft 7. Clamped against 'the base 4 is the enclosing casing 8 in which the compressor and driving motor are hermetically sealed. Extending around the casing 8is the condenser coil 10, one end of which connects with the interior of the casing and the other end of which connects with ipe 2, which connects with the evaporator t rough a float valve, not shown.

In accordance with minvention the compr'essor is a symmetrica ,compact and simple construction which in this instance is arranged in the enclosing casing 8. The compressor com rises a fixed stud 12 arranged centrally o the bed plate 4 upon which rotates a frame 13 secured to the drive shaft 7. The frame is symmetrically constructed with respect to the axis of rotation thereof and on opposite sides of the axis are the two cylinder bores 14 symmetrically arranged with respect to the axis of rotation. The two pistons 15 are secured at their adj acent ends to the scotch yoke 16 in which a slide or cross head 17 is mounted to slide transversely. The fixed pin 18 is mounted eccentrically in th'e post 12 and is journalled in the slide 17. The upper end of the pin 18 terminates in an offset portion 19 which 0F SCHENEGTADYVLNEW Yonx, assrenoa ro GENERAL inmoraleconm, a oonronarroir or Naw Yonx.

is concentric with the axis of the post 12 and for the shaft. The rotor 20 of the electric motor is secured directly to the drive shaft 7 and its weight together with the weight of the member 13 and the pistons is vsustained by theaforesaid thrust bearing. Each cylin der is shown having a flap exhaust valve 22 and over the^valves are the sheet metal ca 23 with which connect the passages 24 in tii frame 13 for the escape of the compressed as or refrigerant. Secured to and enclosing the rotatable frame 13 is the sheet metal the shaftJ 7 and which forms a thrust bearing casing 25 shown as comprising a lower cylindrical portion and an upper conical portion. In this construction the moving parts are symmetrically arranged with respect to the axis of rotat1on and are balanced, hence vibration and noise due to the operation of the machine are reduced to a minimum. A11- other important feature of this construction is the lubricating system and the oil seal for the exhaust valve and for the inlet passage for refrigerant. A quantity .of oil is placed in the outer casing 8 which when the apparatus is at rest collects in the bottom as shown in the drawing.

dTwo pipes

26 and 27 carried by the frame 13 on opposite sides thereof have their lower ends -well below the oil level and turned in the direction of movement so that oil will be forced up the pipes by the rapid movement thereof. The upper end of each pipe terminates in a half turn, the exit opening being at a greater distance from the axis of rotation than the entrance opening and the oil delivered therefrom is caught by the circular fixed receptacle 28.

SMI

Suitable passages 29 carryl the oil from receptacle 28 to the bearing of shaft 7 from the lower end of which it passes partly through the inner passages 30 to the thrust bearing ring 31 and partly through the outer passages 32 to the space 33 inclosing the yoke, cross head, slide, etc. from which it finally escapes into the casing 25. Because of the centrifugal force the space 33 is not filled with a solid mass of oil during the operation of the compressor though the parts are well lubricated. The eccentric pin 18 has a gasinlet assage which communicates with pipe 3 an leads up through the thrust bearing ring 31 where it communicates with the lateral passaevsh34 connecting with the inlet ports 35. ile the machine is running, the casing 25 of the compressor is maintained substantially full of oil, thc surplus escaping from the central opening 36 in the to of the casing. The bearings are thereb liept thoroughly supplied with oil and t e. as passage through the thrust bearing and he exhaust valve are provided with an oil seal. The com ressed gas ex elled from the exhaust va ve will natura 1y flow toward the axis of rotation because of the centrifugal force of the heavier oil and will follow up through the passages 24 and out throug the opening 36.

I have chosen the particular embodiment described above as illustrative of my invention and it will be apparent that various modifications maybe made Without departing from the spirit and scope of my invention which modifications I aim tocover by' the appended claims.

What I claim .as new and desire to secure by Letters Patent of the United States, isz,

1. A compressor comprisinor a fixed member, a pluralit of cylinders rotatably mounted on saidy member, a piston in each c linder, a fixed eccentric, means connecting t e eccentric with the pistons, said fixed member and said cylinders being provided With communicating intake passages controlled by the relative movements of said pistons.

2. A compressor comprising a fixed member, a plurality of radial cylinders rotatably mounted on said member, an exhaust valve on the outer end of each cylinder, a piston in each cylinder, a fixed eccentric, means connecting the eccentric with the pistons, said cylinders having intake ports arranged intermediate their ends and said fixed member and cylinders having communicating open intake passages connectin with said ports.

3. A compressor comprising a fixed bearing member, a frame having a pair of opposed cylinder bores formed therein rotatably mounted on said member, a piston in each cylinder, a scotch yoke connecting said pistons, a fixed eccentric pin in said yoke, said frame having intake passages formed therein terminating in intake ports in the cylinder bores and said bearing member having a passage therein communicating with said intake passages.

4. A compressor comprising a fixed bearin stud, a frame having a pair of opposed cy inder bores formed therein rotatably mounted on said stud, a piston in each cylinder, a scotch yoke connecting the pistons, av

slide in said yoke, a fixed eccentric pin secured to said stud and journalled in said slide, said frame having intake assages formed therein terminating in intake' ports in the cylinder bores and said bearing stud and fixed eccentric having an opening communicating with said passa es.

`5. A com ressor com rising a rotatable cylinder an iston an a fixed crank pin, an exhaust va ve at theouter end of the cylinder, and means operative during the rotation of the cylinder to maintain the cylinder and the exhaust valve immersed in lubricatin oil.

6. compressor comprising a fixed crank pin, a piston and cylinder mounted torotate eccentrically about the pin, an exhaust valve at the outer end of the cylinder, and a rotatable oil retaining casin enclosing the cylinder and exhaust valve, t e oil in said casing forming a seal for said valve.

7. A compressor com rising a fixed crank pin, a piston and cylin er mounted to rotate eccentrically, about the pin, an exhaust valve at the outer end of the cylinder, and a rotatable oil retaining casing enclosin the cylinder and exhaust valve and having a central discharge opening therein whereby in the operation of the compressor the body of oil in the casing forms a seal for said valve and is maintained out of engagement with said pin.

8. A compressor comprising a fixed crank pin, a rotatable structure mounted eccentricall thereof and comprisin a plurality of cy inders having istons ierein journalled on said pin, exliaust valves covering the outer ends of said cylinders and an annular oil retaining casing enclosing the cyiinders and valves and means responsive to the rotative movement of said structure for supplying'oil to the central portion thereof.

A compressor comprising a casing containing lubricating oil, a rotatable structure therein includin a cylinder and piston, a fixed eccentrica] y mounted crank pin for said piston, said rotatable structure having means for lifting the oil from the lower portion of thecasing comprising a duct having an entrance opening below the level of the oil, a fixed memberarranged to collect the oil delivered by the ducts and means for conveying oil from said member to the bearing surfaces4 of said structure.

In witness whereof, I have hereunto set my hand this 5th day of December, 1927.

CHARLES L. HEISLER.

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