Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
  • F04B39/02—Lubrication
  • F04B39/0223—Lubrication characterised by the compressor type
  • F04B39/023—Hermetic compressors
  • F04B39/0269—Hermetic compressors with device for spraying lubricant or with mist lubrication

Definitions

• OIL SLINGER DEVICE This invention relates to a compressor oil cooling device, and more particularly to an oil slinger device wherein an elongated hollow body is adapted to receive a portion of the oil pumped upwardly and sling it radially outwardly against the cooler interior surfaces of the compressor in order to conduct heat energy from the oil to the compressor housing.
• the crankshaft of a compressor conducts heat from the motor which drives it, the crankshaft bearings in which it rotates, and other associated parts connected or in close proximity thereto.
• the crankshaft is machined with an oil passage axially - extending therein and has an oil pump connected to its bottom portion, which extends into an oil sump in the bottom of the compressor to pump oil upwardly through the oil passage for distribution to the motor, bearings, and the like in order to cool and lubricate them and the crankshaft.
• the oil is heated to high temperatures, and if not cooled may result in the premature deterioration or complete breakdown of the lubricating properties of the oil, thereby causing premature failure of bearings, wrist pins and the like.
• the compressor would need to be constructed with the compressor parts below the crankshaft top end, which may not be possible due to the curvature of the compressor housing, or the crankshaft would have to be extended to elevate the top end above the compressor parts, which again may not be possible due to the compressor housing, or not desirable due to the increase in weight of the crankshaft.
• the present invention overcomes the earlier described problems and disadvantages associated with the prior art by providing an elongated, rigid tube to be fitted to the oil passage in the crankshaft.
• the tube is angularly disposed relative to the rotational axis of the crankshaft so that the tube remote upper end is spaced upwardly and radially outwardly from the periphery of the crankshaft top end.
• the effect of this is to increase the radius of the remote upper end of the tube from the rotational axis of the crankshaft, thereby increasing its angular velocity. This results in a greater centrif ⁇ ugal force being imparted to the oil to throw it against the compressor housing upper surfaces so that it may be cooled as it flows downwardly along the surfaces to the oil sump.
• O PI Another advantage of the present invention is the length of the tube which allows it to be adjusted to an optimum angular position that will direct the oil against the upper side surfaces of the compressor housing, thereby avoiding any possible obstructions. Furthermore, since the tube may be of variable length, there is no requirement to build the compressor with its internal components disposed below the crankshaft top end, or to extend the crankshaft above these components to eliminate any obstructions in the path of the oil.
• the present invention is concerned with protecting the bearings, valves, motor insulation and the oil from damage, as well as to improve the efficiency of the compressor by preventing these components from overheating.
• the oil is a convenient medium for transferring heat from the compressor components to the housing of the compressor, as the oil can be used to contact all of the components inside the housing. Heat is transferred from the hot components to the oil, and then transferred from the oil to the com ⁇ pressor housing.
• the present invention makes it possible to efficiently utilize the housing as a heat conductor by optimally spraying oil on the housing.
• the present invention provides an oil slinging device comprising a generally elongated hollow body having opposing ends and being connected to a rotatable crankshaft having an oil passage axially disposed therein and with which the body is in communication through one of its ends.
• the upper end of the generally elongated hollow body is angularly disposed relative to the axis of rotation of the crankshaft in order to place the end upwardly and radially outwardly from the crankshaft to increase its effective radius, whereby oil delivered upwardly through the tube is radially slung outwardly from the crankshaft and against the interior surfaces of the compressor housing.
• Fig. 1 is a sectional view of Pig. 2 along line 1-1 and viewed in the direction of the arrows;
• Fig. 2 is a broken-away top plan view of Fig. 1;
• Fig. 3 is a broken-away, elevational view of the upper portion of the compressor viewed from the left side of Fig. 1;
• Fig. 4 is an internal view of the cylinder head of the compressor
• Fig. 6 is a side elevational view of an oil tube disposed in the oil passage of the crankshaft.
• conventional compressor 8 comprises lower housing 10 and upper housing 12, which may be welded or brazed at seam 14.
• crankcase 16 mounted within compressor 8 is crankcase 16 having crankshaft 18 rotatably received therethrough, and a motor 20 comprising rotor 22 secured to crankshaft 18 and stator 24 with field windings 26.
• crankshaft 18 has closed- loop end 28 of connecting rod 30 connected thereto and which has its opposite end connected by wrist pin 32 and spring clip 34 to piston 36 disposed in cylinder 38 of crankcase 16.
• Cylinder 38 has connected thereto gasket 40, leaf plate 42, valve plate 44 , gasket 46, and cylinder head 48, by four bolts 50.
• the piston-cylinder arrangement is dynamically balanced by counterweight 52 connected to crank ⁇ shaft 18.
• crankshaft 18 Disposed in lower housing 10, along with re ⁇ frigerant tubing 54, is oil pump 56 which is connected to the bottom end portion of crankshaft 18 in oil sump 58.
• Crankshaft 18 has axially disposed therein oil passage 60 and upper oil passage 62 for delivering oil to lubricate typical points', such as main bearing 64 and bearing 66.
• main bearing 64 and bearing 66 Disposed in lower housing 10, along with re ⁇ frigerant tubing 54, is oil pump 56 which is connected to the bottom end portion of crankshaft 18 in oil sump 58.
• Crankshaft 18 has axially disposed therein oil passage 60 and upper oil passage 62 for delivering oil to lubricate typical points', such as main bearing 64 and bearing 66.
• oil pump 56 pumping oil from oil sump 58 upwardly through oil passage 60 to not only lubricate points, such as crankcase main bearing 64 and crankshaft bearing 66, but also to conduct heat energy from motor 20, crankcase main bearing 64, crankshaft bearing 66, and other parts connected or in close proximity to crankshaft 18.
• oil pump 56 pumping oil from oil sump 58 upwardly through oil passage 60 to not only lubricate points, such as crankcase main bearing 64 and crankshaft bearing 66, but also to conduct heat energy from motor 20, crankcase main bearing 64, crankshaft bearing 66, and other parts connected or in close proximity to crankshaft 18.
• oil sump 58 Upon termination of its upward travel through oil passage 60 or upper oil passage 62, the oil is returned to oil sump 58 at very high temperatures, and, if not properly cooled, may prematurely loose its lubricating properties, thereby possibly resulting in the early failure of writs pins, bearings and the like.
• oil slinger tube 68 which is fitted in opening 63 of upper oil passage 62 in the top end of crankshaft 18.
• slinger 68 is angularly disposed relative to the rotational axis of crankshaft 18.
• Slinger 68 is of a predetermined length for reasons which will be discussed below and has opening 70 disposed therein, which, as measured from the rotational axis of crankshaft 18, has an effective radius longer than the effective radius of crank ⁇ shaft 18.
• both lower housing 10 and upper- housing 12 are cooler than the oil, heat energy will be conducted from the oil to housings 10 and 12 thereby cooling the oil as it flows downwardly to oil sump 58.
• slinger 68 is angularly oriented from the vertical to direct the spray of oil away from top surface 75 and toward side surfaces 73 of upper housing 12. Further ⁇ more, should certain compressor parts be disposed above the top end of crankshaft 18, as illustrated in Fig.
• slinger 68 may be manufactured having a predetermined length which will insure opening 70 being above such parts, thereby preventing the existence of any obstruction in the path of the oil being slung by slinger 68.
• slinger 68 due to its angular orientation relative to the rotational axis of crankshaft 18 and the increased effective radius of opening 70, is able to sling the oil against surfaces 73 of upper housing 12.
• slinger 68 can be bent to allow directional control of the spray path of the oil exiting opening 70 for various compressor models. It was earlier mentioned that cylinder head 48 experiences extremely high temperatures during the operation of compressor 8.
• bleed holes 80 and 81 are disposed in the side of oil slinger tube 68, with bleed hole 80 facing radially outwardly therefrom.- Because slinger 68 rotates with crankshaft 18, bleed hole 80 will always rotate facing towards upper housing 12.
• a deflector and heat sink 82 having slots 84 disposed therein is transversely disposed on the top surface of cylinder head 48. Consequently, upon slinger 68 rotating past cylinder head 48 a portion of oil is caught by deflector 82 and caused to flow over the surfaces of cylinder head 48 adjacent valve plate 44, while at the same time allowing a remaining portion of the oil to pass through slots 84 and to flow over end portion 49 of cylinder head 48 and ribs 78.
• deflector 82 is transversely disposed on the top surface portion of cylinder head 48 adjacent gasket 46.
• Deflector 82 could be disposed on the top surface of cylinder head 48 adjacent end portion 49, however, due to the small confines generally existing between cylinder head 48 and upper housing 12, it has been found that deflector 82 performs its desired function most efficiently when disposed adjacent gasket 46.
• deflector 82 is of a predetermined height and de ⁇ sirably disposed away from housing 10 to allow for production tolerances.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Compressor (AREA)

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Publications (4)

Family

ID=23475050

Family Applications (1)

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Citations (2)

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• 1983
  • 1983-05-03 WO PCT/US1983/000659 patent/WO1983003877A1/fr active IP Right Grant
  • 1983-05-03 EP EP83901997A patent/EP0107728B2/fr not_active Expired - Lifetime
  • 1983-05-03 AU AU16056/83A patent/AU542162B2/en not_active Ceased
  • 1983-05-03 DE DE8383901997T patent/DE3373122D1/de not_active Expired
  • 1983-06-28 IN IN800/CAL/83A patent/IN161029B/en unknown
• 1984
  • 1984-01-02 SU SU843693205A patent/SU1450757A3/ru active

Patent Citations (2)

Non-Patent Citations (1)

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