US1910498A

US1910498A - Motor compressor unit

Info

Publication number: US1910498A
Application number: US512312A
Authority: US
Inventors: Ploeger Clyde Edward; Alvin E Burgess; Walter A Kuenzli
Original assignee: Servel Inc
Current assignee: Servel Inc
Priority date: 1931-01-30
Filing date: 1931-01-30
Publication date: 1933-05-23
Anticipated expiration: 1950-05-23

Description

May 23, 1933. c E. PLOEGER ET AL 1,910,498

MOTOR COMPRESSOR UNIT Filed Jan. 50, 1931 3 Sheets-Sheet l May 23, 1933.

cl E. PLOEGER ET AL MOTOR COMPRESSOR UNIT Filed Jan. 50 1931 NVNTRS I ATTORNEY May 23, 1933.

C. E. PLOEGER ET AL MOTOR COMPRESSOR UNIT Filed Jan. 30-, 1951 5 Sheets-:Sheefl 5 58 paw CLYDE EDWARD PLOEGER,

Patented May 23, 1933 VILLE, INDIAlfl'A, ASSIGNORS TO OF DELAWARE I ALVIN E. BURGESS, AND WALTER vA. KUENZLI, OF EVANS- SERVEL INQ, OF NEW YORK, N. Y., A CORPORATION MOTOR COMPRESSOR UNIT Application filed January 30, 1931.

This invention relates to compressors and more particularly to motor-compressor units for use inmeehanical refrigerating systems.

The invention is herein described in connection with an hermetically sealed motor-compressor unit for use in a refrigerating system of the compression type. It is desirable that a unit of this character be quiet in operation, compact and'simple in structure, and adequately lubricated over a long period time.

It is an object of the invention to provide a motor-compressor unit fulfilling the above requisites and which is highly eflicient in operation.

Further objects and advantages will heapparent from the following description taken in connection with the accompanying drawmounted as a unit on a frame 18 supported tocooper 1 50 or lugs 22 and bolts 23.

ings wherein V Fig. 1 is an elevation partly'in vertical section showing an hermetically sealed motorcompressor unit contemplated by this invention;

Fig. 2, a detail section of the cross-head and yoke taken on line 2-2 of Fig. 1;

Fig. 3, a view similar to that of Fig. 1 but at right angles thereto;

Fig. 4, a detail section and driving arrangement of the compressor taken on the line Fig. 5, a detail section of the compressor valge plate taken 'on the line 5-5 of Fig. 1; an

Fig. 6, a longitudinal section through the vertically supported compressor exhaust mufiier.

Referring to Fig. 1, a compressor is driven by a vertical electric motorll through a crank 12 journaled in a cylindrical crosshead 13 reciprocable in a tubular yoke-14 to w ich the cylinder of the compressor 10 is attached. The compressor and the motor. age

5' upstanding lugs 16 on the crank-case adapted to with and fit into recesses 17 in the frame 18, the recesses being lined with sound deadening material 19. A dome or cover provided with heat radiating fins 21 is secured to the crank-case by a. retaining ring ton 26 is Serial 1%. 512,312.

The electrical connections to the motor are made through the crank-case by means of fluid tight insulating bushings 24 of dielectric material. The jointbetween the crank-case 15 and the dome is made fluid tight and the interior of the casing is exhausted of air and moisture and utilized as part of the'low pressure side of the refrigerant circulation system, being connected to the evaporator f through a conduit 25 which terminates within the casing at 26 as shown in Flg. 3.

The compressor, shown in detail in Fig. 4, includes .a stationary piston, 26 removably mounted in the frame extension 27 of the frame 18 and is held therein by the valve plate 31. In one end of the piston is mounted a check valve 28 which cooperates with a removable valve seat 26 for normally closing a passage 29 through the length of. the piston, said valve being unseatable by the action of the compressor. The passage 29 communicates with the exhaust port 30 in a valve plate 31 which is also attached to the extension 27 of the motor frame. The compressor cylinder 32 cooperating with the pisattached to or made integral with a tubular yoke 14 and is provided with an intake port 33.

The vertical hollow shaft 34 having at its lower end an eccentric portion or crank 12 and a counterbalance 35. The crank 12 is journaledin the cross-head 13 which reciprocates in the tubular yoke 14. vA passageway 36 in the cross-head 13 communicates at one end with an intake pipe 37 attached to the cross-head and extending into the chamber within the compressor casing and the other end of passage 36 cooperates with the yoke to open and close intake port 33 in a cylinder 32 responsive to the reciprocating movement of the cross-head in the yoke.

As shown in Fig. 5 the valve plate 31 is provided with a passage 38 communicating at one end with the compressor exhaust port 30 and opened and closed by a check'valve 39. A passage 40 opening into the passage 38 between the exhaust port 30 and the check valve 39 is opened and closedto the interior of the sealed casing by valve 41 operated by motor 11 is provided with a a in ago X of the electric motor as shown in Flg. l. The purpose of the valve 41 is to equalize the compressor piston until the motor comes up to operating speed at starting.

The exhaust passage 38 in the valve plate 31 communicates with the condenser connection 43 through check valve 39 and a M mufier n as shown in lli s. 3 and 6. The mufier 44 comprises an en arged chamber to loafied by a series of felt or other orous material disks 46 held in place by per orated metallic disks 427.

In order to afiord lubrication for the moving parts of the motor-compressor there is provided a pum operated by the relative motion between t e cross-head and yoke. As shown in Figs. 2 and t a c lindrical pump 39 chamber 48 in the cross-hea 13 opens at one end at the bearing surface of the crank 12 and receives a piston 49 attached to anextension or bridge 50 over the end of the tubular yoke 14. It is not necessary that the parts of the oil pump be arranged as shown, but the piston may be on the cross-head and the cylinder in the yoke, or any arrangement whereby the pump is operated by the relative motion in the cross-head and yoke drive. Oil is drawn into the pump chamber 48 from the bottom of the crank-case 15 through a pipe 51 attached to the lower end of the eccentric crank 12 and communicating with ,intake valve opening 52 in the crank 12 through a passage 53. Uil is forced from the pump cylinder 48 through the outlet valve opening 54 and passage 55 in the eccentric crank 12 into the hollow motor shaft 34: from where it may be distributed to the motor hearw ing in any desired manner as, for instance, through small radial ducts in the shaft. In operation, gas is drawn into the compressor through pipe 37, passage 36 and intake port 33. An additional port 56 may be I 4 3 provided in the cylinder 32 to insure a complete charge of as before the start of the compression stro e. The compressed gas is discharged through check valve 28, passage.

29, port 30, passage 38, check valve 39 and mufier it into the line t3 which is adapted to he connected to the condenser in a refrlgerating system. Sound of the as discharge through valve 39 is maimed hy-t e smoothing action on the gas flow of the felt disks 4:6. in the mufier 44:.

It will he obvious to those skilled in the art that various other changes may be made in the construction and arrangement without departing from the spirit of the invention and therefore the invention is not limited to what is shown in the drawings and described in the specification but only as indicated in the appended claims.

We claim:

t3 1. A. motor-compressor unit including a afietic device 42 responsive to the leak-- pressures on both sides of the intense casing, a frame supported within said casing, a compressor mounted on said frame and comprising a stationary piston and a reciprocable cylinder, a motor also mounted on said frame and havinga hollow shaft with ducts leading from the interior of the shaft to the motor bearing surfaces, a yoke attached to the compressor cylinder, a crosshermetically scale casing, a frame support-.

ed within said casing, a compressor mounted on said frame and comprising a stationary piston and a reciprocable cylinder, a vertical motor also mounted on said frame and having a hollow shaft with radial ducts leading from the interior of the shaft to the motor bearing surfaces, a tubular yoke attached to the compressor cylinder, a c lindrical crosshead reciprocable in said yo e and having a valve opening adapted to cooperate with the compressor intake port, a pump comprising a cylinder formed in the cross-head and a piston attached to the yoke, a crank on the motor shaft journaledin the cross-head and having intake and discharge valve openings for said pump, the discharge opening communicating with the interior of the motor shaft, and the intake opening communicating with an intake pipe connected to the crank.

3. A motor-compressor unit including an hermetically sealed casing, a frame support! ed within said casing, a compressor mounted on said frame and comprising a stationary piston and a reciprocable cylinder,'a vertical motoralso mounted on said frame and having a hollow shaft with radial ducts leading from the interior of the shaft to the motor bearing surfaces, a tubular yoke attached to the compressor cylinder, a c lindrical crosshead recipro'cable in said yo e and, having a valve opening adapted to cooperate. with the compressor intake port, a pump comprising a cylinder formed in the cross-head and a piston attached to the yoke, a crank onthe motor shaft journaled in the cross-head and having intake and discharge valve openings for said pump, the discharge opening communicating with the interior of the motor shaft and the intake opening communicating with an intake pipe connected to the crank, a mufier in the discharge line of the compressor, and an unloader valve for said compressor.

4:. A motor-compressor unit including a lid ' er and arranged to be operated by said casing, a vapor intake line communicating with the chamber enclosed by said casing, a frame removably mounted within said casing, noise deadening supports for said frame, a motor mounted on said frame, a compressor also mounted on said frame, a yoke and crosshead drive between the motor and the compresser and a pump operated by the relative movement in said drive, the cross-head having a passage adapted to cooperate with the intake port of the compressor.

5. A motor-compressor unit including a casing, a'vapor intake line communicating with the chamber enclosed by said casing, a frame removably mounted within said casing, noise deadening supports for said frame, a motor mounted on said frame, a compressor also mounted on said frame, a yoke and crosshead drive between the motor and the compressor, a pump operated by the relative movement in said drive, the cross-head having a passage adapted to cooperate withthe intake port of the compressor and. a mufller in'the discharge line of said compressor.

- 6. In a motor-compressor unit, a yoke and cross-head drive between the motor and compressor, and a lubricant pump operated by the relative motion in said drive, the crosshead having a passage adapted to cooperate with the compressor intake port.

7. The combination of a crank, reciprocating pumps located at right angles to each otha cross-head rotatably mounted on said crank, a yoke slidably mounted on said cross-head,

g valve passages in said crank for controlling the admission and discharge of fluid to one 1 of said pumps, and a valve passage in said cross-head for controlling the admission of fluid to another of said pumps.

8. In combination, a reciprocating compressor, a yoke integral with the movable element of said compressor, a cross-head adapted to reciprocate in said yoke, a pump chamber in said cross-head, and a piston adapted to reciprocate in said pump chamber and connected to said yoke.

9. A motor-compressor unit comprising a reciprocating compressor, a counter-balanced crank, a motor for driving said crank, a crosshead and yoke drive between said crank and said compressor, a pump adapted to be operated by the relative motion in the cross-head and yoke drive, a fluid tight casing around said motor and compressor, said pump communicating with the lower portion of the chamber enclosed by said casing, and an outlet port for said pump communicating with passages which lead to the moving parts of said motor-compressor.

10. In a motor driven reciprocatory mechanism, a yoke and cross-head drive between the motor and reciprocatory mechanism, and cooperating pump elements constituted by crank,

portions of said cross-head and said yoke' and driven by the reciprocatory motion of the cross-head with respect to the yoke.

11. In combination, a reciprocatory mec anism, a driving motor for said mechanism having a-crank, a yokeland cross-head drive between the crank and said mechanism, and an oil pump driven by the reciprocatory motion of the cross-head with respect to the yoke, said crank having intake and discharge valve openings for the .oil pump.

12. The combination of a crank,-a reciproeating campressor, a cross-head and yoke drive" between said crank and said compressor, and an oil pump driven by the relative movement of the cross-head with respect to the yoke, said crank charge valve passages for said oil pump and the cross-head having a passage adapted -to cooperate with the intake portof said compressor.

In testimony whereof we afiix our signatures.

CLYDE E. PLOEGER. ALVIN E. BURGESS. WALTER 1A,. KUENZLI.

an inlet port for I having intake'and dis-