USRE19961E

USRE19961E - Motor compressor unit

Info

Publication number: USRE19961E
Authority: US
Priority date: 1927-03-17
Filing date: 1931-02-18
Publication date: 1936-05-12

Description

ay 1935- H. CRANE I 3 upTon COMPRYYJSSOR UNIT Original Filed March 17, 1927 2 Sheets-Sheet 1 VENTOR I Hqrve .Crane ATTORNEY H. EQCRANE A MOTOR coimwsson UNIT Original Filed larch 17. 192 7 -2 Shets-Sheet 2 Harve BY ENTOR Y E. Crane mm A TT'ORNE Y Reissu'ed May 12, 1936 l v UNITED STATES PATENT OFFICE:

MOTOR- coMraEssoa- UNI'I Harvey E. Crane, Fort Wayne, Ind., assign! to The Hoover Company, a corporation of Ohio Original No. EJ041555, dated March 5, 1929, Serial No. 175,975, March 17,1927; Application for reissue February 16 Claims.

The object is to provide an improved gas compressing machine particularly adapted for use in connection with refrigerating systems; the invention disclosed relates particularly to the arrangement and construction of the compressor and the motor for driving the compressor.

A further object of the invention is to provide a fully enclosed motor compressor unit whereby the usual stumng box about the compressor shaft to present leakage therearound maybe dispensed with, or in other words, to provide an arrangement in which there are no moving parts exposed to the atmosphere which might need anything in the way of packing to prevent gas leakage.

A still further object of the invention is to provide a gas compressing unit wherein the motor and compressor are mounted upon a central main 'motor compressor unit is :clearness of illustration,- the view [from the compressor end of theunit.

' numeral l I being the portion of ing the motor stator support casting or frame through which all connections to and from said unit pass thereby permitting said unit to be ma e up and tested in full view before sealing. r

A further object of the invention is to provide means in a motor compressor major parts are rigidly connected so'that there will be no tendency forone part of the unit to become dislocated with respect to any of the others 'Zl'he objects of this invention are; accomplished by employing a frame member which forms the support for both the motor and compressor of the 'unit and the other related parts of the motor compressor mechanism and to which frame are secured closures or domes by means of which the completely enclosed in an air-tight manner in order that gas undercompression may not leak from the system nor air leak thereinto. The gas ports for the compressor and :all electrical leads are preferably arranged within this frame so that there will be no danger of disruption thereof due to relative movement between the domes and said frame member.

In the drawings: I I Figure 1 shows a complete motor compressor .unit suitable for use in connectionwlth refrigeratingmachines, the showing being in section sub:

stantially on lines l l of Fig. 2;

Fig. 2 Lean end view of Fig. 1 with the outer dome moved and with certainparts left out for being taken the-drawings the main or frame castingis indicated by numeral I and comprises two major parts H and I2, the first, or the y the casting form'- while the portion l2 unit wherein all part indicated by 18, 1931, Serial No. 516,704

indicates the compressor support. These two parts of the main casting should be firmly secured together in any appropriate manner, and as shown, preferably by spot-weldingthrough the flange l4. However these two parts may be made of a single piece, or they may be bolted together in the customary fashion.

Casting I2 is approximately U-shapedand the outer overhanging portion outer bearing support for the motor shaft.

It is to be understood that the main frame as above described may be made as a single piece if its design is not such as to make it diflicult to cast as a single member, and that it is not necessary t at the main frame major portions such as is speciflcally'illustrated. The main frame may also comprise a major portion and several minor portions, the object of this invention being to provide a construction wherein the entire machine is frame and not to provide frame support.

Mounted in casting l2 and therefore supported in casting ll because between the castings which carries the motor-rotor ll mounted on one end thereof, andlalso on the other side of the main bearing there is mounted on said shaft, an eccentric l8 for operating the pistons IQ of the compressor. 7 yond the outer bearing formed in the outer portion 15 of the U-shaped frame member, and here is mounted a centrifugal compressor unloading device 2|,

a specific. form of main Cylinders 20 mounted in bores of the frame 35 as it is supported on'main frame assembly l0 and 40 not on some part unconnected "therewith so that there might be relative movement between the main frame and the compressor mounting.

i As a part of frame member 12 thereisl housing from which pipes lead {-8545 indicated at 22 and 23, these pipesbeing the high. Y

vided .a valve pressure pipes which lead from the valve casing 24 and connect to the discharging into passages therein which open therethrough at 21 and it for high pressure gas. for-instance, into condenser 'ofa'refrigeratingsystem. Q 4 Q A mufller for the compressed gasis incorporated inconnection with the valve lig nd is' indicated generally by numeral 20. The pipe 30 55 I thereof serves as an Ill be limited to two supported from a main' of that connection existing there is a motor shaft I6 Shaft l6 extends through and bemainframe H at 25 andme discharge of leads from the valve casing 24 to a pressure equalizing valve 40, so that when the machine stops the pressures throughout the system may equalize.

Suction gas is permitted to enter the unit through conduit 4| which may be connected, through pipe 42, to the expansion coils of a refrigerating cylinders 2liare shown at 43, which of course take in such gas which'enters the chamber formed by the domes 32.

The unit as thus far described will comprise'a complete motor compressor unit which maybe operated as such, the entire unit being mounted on a central frame with the motor projectingfrom one side thereof and the compressor from the other side thereof. Two domes 32 are provided for inclosing this apparatus, one to be placedover the motor side of the unit and the other over the compressor side of the unit. These domes may be secured to the main frame I I" through a series of bolts, one of which is shown at 33 as passing through the holes 34.- However, the joints between these domes and the main frame I I should form a. gas tight seal.

Fins 35 are provided upon the enclosing domes 32 in order that the heat generated by the motorcompressor unit may be more readily dissipated. Main frame casting l l is provided at its bottom part with integral ears 36 to which may be secured angle members such as 31 whereby the entireunit may be mounted upon an appropriate base.

It will be seen that there has been provided a motor compressor unit which is very rugged in construction and one wherein there is the mini.- mum liability for the parts to become disarranged. It is further apparent that during operation of this unit the domes 32 form a chamber for receiving the suction gas and that the motor and compressor units operate within this gas medium, for instance the suction gas enters the chamber formed by that dome 32 which incloses the compressor unit through conduit .4l, and the compressor unit takes the gas therefrom through suction ports 43. That dome 32 which incloses the motor prevents the escape of any 88.5 which may leak through the main bearing It.

It is obvious that an arrangement of piping might be provided to connect the conduit 4| with the suctionports 43, then the domes 32 would serve merely to prevent the escapev of any gas which might leak from the compressor; or as another modification the pipes .22 and 23 might be I eliminated, under which condition the exhaust side of thecompressor would -open ,into the chambers formed by that dome 32 which incloses the instance'to the condenser of a refrigerating machine, through pipes 21 and 28; the compressor However, in either modification there are no moving parts exposed to the atmosphere which might need packing to prevent leakage.

the unit may be run in this condition to determineits fitness for the market: or in case the unitmay need repairing itis merely necessary to remove either of the domes :32, as the case may require and suitable repairs operating tests mayreadily bemade'. By having the entire machine built. upon the central casting l0 and placing thedome 32 over system. The suction ports for the compressor unit, and finally be carried oil, for l the motor and compressor, it is possible by sealing these domes to provide a. construction wherein there is practically no liability of leakage, and further, it is possible to dispense with the usual shaft packing employed in machines of this general character.

I claim:

1. In a motor 'compressorunit', the combination of a main frame comprising the support for the unit, a motor and a compressor mounted on the main frame, driving connection between the motor and the-compressor and closuremembers enclosing the motor and compressor and sealed to themainsframe said motor and said compressor being supported entirely by said frame.

2. In a motor compressor unit, the combination of a main supporting frame, a motor mounted-on one side of said frame, a compressor mounted on the other side of said frame, and a closure member mounted on each side of said frame and forming two separate chambers in which the motor and compressor are located respectively said motor and said compressor being supported en-.

tirely by said frame.

3. A motor compressor unit comprising in combination a central main frame, closure members secured to-- each side of said frame and forming two distinctchambers, a motor located in one of said chambers and a compressor in the other, said motor and said compressor being supported entirely by said frame.

4. In a gas compressing machine the combination of a main frame member comprising a support for both a prime mover and a compressor and closure members in sealed relation with said frame. member, said frame extending beyond said closure members forming a base said motor and said compressor being supported entirely by said frame.

5. In a gas compressing machine, the combination of a main frame member, a motor mount- I ed on one side of said frame member and a compressor on the other-,closure members in sealed relation with said frame member forming individual chambers housing said motor and said compressor-and conduitspassing through saidframe' member and connecting said-chamber housing the compressor with the exterior, said motor. and said compressor being supported entirely by said frame member.

6. In a motor compressor unit the combination of a main supporting frame,a motor, carried by said frame, a compressor carriedby said frame and operably connected to said .motor gas conduitsformed insaid frame togconvey. gas to and from said compressor andgenclosingpmembers sealing said motor and said compressorin indi- I vidual chambers on opposite sides ofsaid frame,

. xsaid motor and said-compressor being supported then operates in a gasmedium of high pressure.

entirely by saidframe.

"I. In a motor compressor unitthe combination and fsupportedthereby said motor and said compressor being supported-entirely by saidframe.

8;. :A motor compressor :unit comprising in combination a central main framejclosure'members v secured to each side'.of-.:said-.'frame, andforming' two distinct chambers therewith; a motor located inone of said ohambers'and a compressor iii'the other, and a driving connection between the m0- ,tor and compressor, said motor and said compressor being supported entirely by said frame.

I closing members connected to said main frame' the atmosphere said motor and tion of a main frame 9. In a motor compressor unit the combination of a main frame, a motor carried by said frame, a compressor carried by said frame and operably connected to said motor, a .gas conduit formed in said frame connected to said compressor and compressor from said compressor being supported entirely by said frame.

10. In a motor compressor unit the combinacomprising a support for the unit, a motor and a compressor mounted on said main frame, a driving connection between for sealing the motor and the the motor and the compressor and closure mem main frame, said motor and hers sealed to the said compressor being supported by said main frame entirely independently of said closure members.

' 11. Inc, motor compressor unit the combination of a main supporting frame, a motor mounted on one side of said frame, a compressor mounted on the otherside of said frame, and'closure members mounted on each side of said frame and forming with the frame two separate closed chambers in which the motor and-compressor are located respectively, said motor and said coinpressor being supported on said main frame independently of said closure members and said frame being supported independently of said 010-.- sure members. 4

12. In a gas compressing machine the combination of a main frame member comprising the sole support for both a prime mover and a compressor, and closure members in sealed relation with said main frame for sealing the prime mover and compressor from the atmosphere and said frame extending beyond said closure members and forming a base.

13. In a gas compressing machine the combination of a main frame member,.a motor and a compressor mounted on said framemember, said sealing the motor frame member sor.

- said motor and said compressor motor and said compressor being supported entirely by said frame member, closure members in sealed relation with said frame member for and compressor from the atmosphere and conduits passing through said and connected to said compres- 14. In a motor compressor unit the combination'of a main supporting frame, a motor carfied by said frame, a compressor carried by said frame and operably connected a gas conduit formed in said frame and connected to said compressor and closure members in sealed relation with said frame for sealing from the atmosphere, said motor and said compressor being supported independently of said closure members.

15. A motor operated pump comprising a casing having a central supporting portion and means forming a compartment on each side thereof, a unit pump located in one of said compartments, a motor located in another compartment and driving means connecting said motor and pump, said pump and said motor being supported entirely by said central supporting portion;

16. In a motor compressor unit, a main frame comprising a supporting section and an extension at one side thereof, a motor mounted on said extension and having an armature shaft journalled in and extending through the supporting section, a compressor actuated "by said motor shaft mounted on said main frame at the side opposite said motor, a closure member cooperating with said main frame to provide a fluid-tight compartment housing said motor, and a second closure member secured to said main frame to form a second fluid-tight compartment enclosing said compressor, said motor and said comp'ressor being supported entirely by said frame.

- HARVEY E. CRANE.

to said motor,