EP0064018A1 - Device for equalizing the pressure of a compressor case and for the return of oil to that case - Google Patents

Device for equalizing the pressure of a compressor case and for the return of oil to that case Download PDF

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Publication number
EP0064018A1
EP0064018A1 EP82440011A EP82440011A EP0064018A1 EP 0064018 A1 EP0064018 A1 EP 0064018A1 EP 82440011 A EP82440011 A EP 82440011A EP 82440011 A EP82440011 A EP 82440011A EP 0064018 A1 EP0064018 A1 EP 0064018A1
Authority
EP
European Patent Office
Prior art keywords
oil
case
pressure
compressor
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP82440011A
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German (de)
French (fr)
Inventor
François Galian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Usines Quiri & Cie Sa Ste
Original Assignee
Usines Quiri & Cie Sa Ste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Usines Quiri & Cie Sa Ste filed Critical Usines Quiri & Cie Sa Ste
Publication of EP0064018A1 publication Critical patent/EP0064018A1/en
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to the field of compressor construction, in particular for refrigeration machines, and relates to a device for balancing the pressure of the crankcase on a compressor and for returning oil to said crankcase.
  • pressure balancing between the casing and the suction chamber is generally carried out by means of a calibrated bore, possibly fitted with a valve, and also serving as an oil return for the oil pumped up along the piston liners during sudden overpressures.
  • the present invention aims to overcome these drawbacks.
  • a device for balancing the pressure of the crankcase on a compressor and oil return to said crankcase characterized in that it is consisting of a pressure equalization tube between the suction and the casing connected at one end to the hollow of the elbow of the suction pipe and at its other end inside the casing, and by a return pipe from oil connecting a low point of the suction chamber inside the casing, and provided with a siphon forming a buffer and a calibrated tablet.
  • FIG. 1 is a front elevation view of a compressor fitted with the device according to the invention
  • FIG. 2 is a partial side elevation view according to FIG. 1.
  • the device for balancing the pressure of the crankcase on a compressor and for returning oil to said crankcase consisting of a pressure balancing tube 1 and an oil return line 2.
  • the pressure balancing tube 1 between the suction and the casing 3 is connected at one end to the hollow 4 "of the elbow 5 of the suction pipe and at its other end inside the casing 3.
  • This arrangement allows to take advantage of the depression existing at the level of the hollow 4 of the elbow 5 with respect to the rest of the suction pipe and thus to achieve a suction effect in the casing 3 through the tube 1 with a tendency to obtain a pressure slightly higher in the suction chamber 6 than that of the casing 3, so that the oil rises along the jackets 7 of the pistons 8 are avoided.
  • Line 2 connects a low point of the suction chamber 6 inside the casing 3 and makes it possible to ensure the return of the oil coming from either an oil separator, either from the refrigeration circuit or from the valves.
  • the pipe 2 is provided with a siphon 9 , forming a buffer and with a calibrated tablet 10.
  • This calibrated tablet 10 is, moreover, intended to prevent a sudden arrival of fluid to be compressed, such as freon or ammonia, mixed in liquid form with oil, in the casing 3.
  • the tablet 10 limits the incoming flow and thus allows a progressive vaporization of the fluid as it arrives in the casing 3 from which it is taken up by the tube 1 without the various bearings being liable to be damaged.
  • the invention it is possible to achieve pressure balancing of the compression housing and thus to avoid, in a simple manner, and at a low cost price, oil rises in the event of overpressure.
  • the oil coming from a separator, from the refrigeration circuit, or from the valves can be easily brought back to the crankcase without risk of rising in case of change of regime, and without risk of deterioration of the bearings by refrigerant possibly in emulsion. in oil,

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

Abstract

The device consists of a tube (1) for balancing the pressure between the suction port and the case, connected at one end to the hollow (4) of the elbow (5) of the suction pipe and at its other end to the interior of the case (3), and of an oil-return pipe (2) connecting a low point of the suction chamber (6) to the interior of the case (3) and equipped with a siphon (9) forming a buffer and with a calibrated washer. This device also makes it possible to cool the oil of the compressor, without any risk of damage to the bearings and without the risk of emulsion with the oil. <IMAGE>

Description

La présente invention concerne le domaine de la construction de compresseurs, en particulier pour machines frigorifiques, et a pour objet un dispositif d'équilibrage de la pression du carter sur un compresseur et de retour d'huile audit carter.The present invention relates to the field of compressor construction, in particular for refrigeration machines, and relates to a device for balancing the pressure of the crankcase on a compressor and for returning oil to said crankcase.

Actuellement, dans les compresseurs connus, l'équilibrage de pression entre le carter et la chambre d'aspiration est généralement effectué au moyen d'un perçage calibré, éventuellement muni d'un clapet, et servant également de retour d'huile pour l'huile remontée le long des chemises des pistons lors de surpressions brusques.Currently, in known compressors, pressure balancing between the casing and the suction chamber is generally carried out by means of a calibrated bore, possibly fitted with a valve, and also serving as an oil return for the oil pumped up along the piston liners during sudden overpressures.

Ces dispositifs d'équilibrage connus ne permettent toutefois pas de limiter les remontées d'huile. En outre, ces dispositifs existants ne permettent pas d'éviter l'arrivée de fluide frigorigène sous forme liquide, en émulsion dans l'huile, dans le carter à partir de la chambre d'aspiration, de sorte que les divers paliers sont exposés à un risque de détérioration.These known balancing devices do not, however, limit the oil flows. In addition, these existing devices do not prevent the arrival of refrigerant in liquid form, in emulsion in oil, in the casing from the suction chamber, so that the various bearings are exposed to risk of deterioration.

La présente invention a pour but de pallier ces inconvénients.The present invention aims to overcome these drawbacks.

.Elle a, en effet, pour objet un dispositif d'équilibrage de la pression du carter sur un compresseur et de retour d'huile audit carter, caractérisé en ce qu'il est constitué par un tube d'équilibrage de pression entre l'aspiration et le carter relié à une extrémité au creux du coude de la conduite d'aspiration et à son autre extrémité à l'intérieur du carter, et par une conduite de retour d'huile reliant un point bas de la chambre d'aspiration à l'intérieur du carter, et pourvue d'un siphon formant tampon et d'une pastille calibrée..It indeed has for object a device for balancing the pressure of the crankcase on a compressor and oil return to said crankcase, characterized in that it is consisting of a pressure equalization tube between the suction and the casing connected at one end to the hollow of the elbow of the suction pipe and at its other end inside the casing, and by a return pipe from oil connecting a low point of the suction chamber inside the casing, and provided with a siphon forming a buffer and a calibrated tablet.

L'invention sera mieux comprise grâce à la description ci-après, qui se rapporte à un mode de réalisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence au dessin schématique annexé, dans lequel : la figure 1 est une vue en élévation frontale d'un compresseur muni du dispositif conforme à l'invention, et la figure 2 est une vue partielle en élévation latérale suivant la figure 1.The invention will be better understood thanks to the description below, which relates to a preferred embodiment, given by way of nonlimiting example, and explained with reference to the appended schematic drawing, in which: FIG. 1 is a front elevation view of a compressor fitted with the device according to the invention, and FIG. 2 is a partial side elevation view according to FIG. 1.

Conformément à l'invention, et comme le montrent plus particulièrement, à titre d'exemple, les figures 1 et 2 du dessin annexé, le dispositif d'équilibrage de la pression du carter sur un compresseur et de retour d'huile audit carter est constitué par un tube 1 d'équilibrage de pression et par une conduite de retour d'huile 2.According to the invention, and as shown more particularly, by way of example, FIGS. 1 and 2 of the appended drawing, the device for balancing the pressure of the crankcase on a compressor and for returning oil to said crankcase consisting of a pressure balancing tube 1 and an oil return line 2.

Le tube 1 d'équilibrage de pression entre l'aspiration et le carter 3 est relié à une extrémité au creux 4" du coude 5 de la conduite d'aspiration et à son autre extrémité à l'intérieur du carter 3. Cette disposition permet de tirer partie de la dépression existant au niveau du creux 4 du coude 5 par rapport au reste de la conduite d'aspiration et de réaliser ainsi un effet de succion dans le carter 3 à travers le tube 1 avec une tendance à obtenir une pression légèrement supérieure dans la chambre d'aspiration 6 à celle du carter 3, de sorte que les remontées d'huile le long des chemises 7 des pistons 8 sont évitées.The pressure balancing tube 1 between the suction and the casing 3 is connected at one end to the hollow 4 "of the elbow 5 of the suction pipe and at its other end inside the casing 3. This arrangement allows to take advantage of the depression existing at the level of the hollow 4 of the elbow 5 with respect to the rest of the suction pipe and thus to achieve a suction effect in the casing 3 through the tube 1 with a tendency to obtain a pressure slightly higher in the suction chamber 6 than that of the casing 3, so that the oil rises along the jackets 7 of the pistons 8 are avoided.

La conduite 2 relie un point bas de la chambre d'aspiration 6 à l'intérieur du carter 3 et permet d'assurer le retour de l'huile provenant, soit d'un séparateur d'huile, soit du circuit frigorifique, soit des soupapes.Line 2 connects a low point of the suction chamber 6 inside the casing 3 and makes it possible to ensure the return of the oil coming from either an oil separator, either from the refrigeration circuit or from the valves.

Afin d'éviter les remontées d'huile en cas de changement de régime, la conduite 2 est pourvue d'un siphon 9,-formant tampon et d'une pastille calibrée 10. Cette pastille calibrée 10 est, en outre, destinée à empêcher une arrivée brusque de fluide à comprimer, tel que du fréon ou de l'ammoniac, mélangé sous forme liquide à l'huile, dans le carter 3. En effet, la pastille 10 limite le débit arrivant et permet ainsi une vaporisation progressive du fluide au fur et à mesure de son arrivée dans le carter 3 d'où il est repris par le tube 1 sans que les différents paliers risquent d'être détériorés.In order to prevent the oil from rising in the event of a change in speed, the pipe 2 is provided with a siphon 9 , forming a buffer and with a calibrated tablet 10. This calibrated tablet 10 is, moreover, intended to prevent a sudden arrival of fluid to be compressed, such as freon or ammonia, mixed in liquid form with oil, in the casing 3. In fact, the tablet 10 limits the incoming flow and thus allows a progressive vaporization of the fluid as it arrives in the casing 3 from which it is taken up by the tube 1 without the various bearings being liable to be damaged.

Grâce à l'invention, il est possible de réaliser l'équilibrage de la pression du carter de compression et d'éviter ainsi, de manière simple, et à un faible prix de revient, des remontées d'huile en cas de surpression. En outre, l'huile provenant d'un séparateur, du circuit frigorifique, ou des soupapes peut être facilement ramenée au carter sans risque de remontée en cas de changement de régime, et sans risque de détérioration des paliers par du fluide frigorigène éventuellement en émulsion dans l'huile,Thanks to the invention, it is possible to achieve pressure balancing of the compression housing and thus to avoid, in a simple manner, and at a low cost price, oil rises in the event of overpressure. In addition, the oil coming from a separator, from the refrigeration circuit, or from the valves can be easily brought back to the crankcase without risk of rising in case of change of regime, and without risk of deterioration of the bearings by refrigerant possibly in emulsion. in oil,

Il est cependant également possible d'injecter par ce dispositif du fluide frigorigène dans le carter pour permettre le refroidissement de l'huile, l'injection de ce fluide frigorigène dans le carter étant alors pilotée par un capteur de température d'huile.However, it is also possible to inject refrigerant through this device into the crankcase to allow the oil to cool, the injection of this refrigerant into the crankcase then being controlled by an oil temperature sensor.

Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté au dessin annexé. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments, ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.Of course, the invention is not limited to the embodiment described and shown in the accompanying drawing. Modifications remain possible, in particular from the point of view of the constitution of the various elements, or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.

Claims (1)

Dispositif d'équilibrage de la pression du carter sur un compresseur et de retour d'huile audit carter, caractérisé en ce qu'il est constitué par un tube (1) d'équilibrage de pression entre l'aspiration et le carter relié, à une extrémité au creux (4) du coude (5) de la conduite d'aspiration, et à son autre extrémité à l'intérieur du carter (3), et par une conduite (2) de retour d'huile reliant un point bas de la chambre d'aspiration (6) à l'intérieur du carter (3), et pourvue d'un siphon (9) formant tampon et d'une pastille calibrée (10), ce dispositif permettant également de refroidir l'huile du compresseur sans aucun risque de détérioration des paliers et sans risque d'émulsion avec l'huile.Device for balancing the pressure of the crankcase on a compressor and oil return to said crankcase, characterized in that it is constituted by a tube (1) for balancing pressure between the suction and the crankcase connected, to one end at the hollow (4) of the elbow (5) of the suction pipe, and at its other end inside the casing (3), and by an oil return pipe (2) connecting a low point from the suction chamber (6) inside the casing (3), and provided with a siphon (9) forming a buffer and a calibrated pellet (10), this device also making it possible to cool the oil of the compressor without any risk of deterioration of the bearings and without risk of emulsion with oil.
EP82440011A 1981-04-22 1982-04-20 Device for equalizing the pressure of a compressor case and for the return of oil to that case Withdrawn EP0064018A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8108500A FR2504607B1 (en) 1981-04-22 1981-04-22 DEVICE FOR BALANCING THE PRESSURE OF THE CRANKCASE ON A COMPRESSOR AND FOR RETURNING THE CRANKCASE OIL
FR8108500 1981-04-22

Publications (1)

Publication Number Publication Date
EP0064018A1 true EP0064018A1 (en) 1982-11-03

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EP82440011A Withdrawn EP0064018A1 (en) 1981-04-22 1982-04-20 Device for equalizing the pressure of a compressor case and for the return of oil to that case

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EP (1) EP0064018A1 (en)
FR (1) FR2504607B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986007415A1 (en) * 1985-06-14 1986-12-18 Basseggio Narcizo Osorio Crankcase chamber

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE478577C (en) * 1927-08-07 1929-06-28 Hubert Dickmann Oil guide in compressors or the like
US3465953A (en) * 1966-10-28 1969-09-09 Carrier Corp Compressor lubrication arrangement
FR2013824A1 (en) * 1968-07-26 1970-04-10 Copeland Refrigeration
GB1244105A (en) * 1969-02-04 1971-08-25 Bitzer Kuehlmaschb G M B H Reciprocating piston compressors
US3713513A (en) * 1971-06-10 1973-01-30 Fedders Corp Crankcase evacuation and oil return system
DD96553A1 (en) * 1972-03-16 1973-03-20
FR2386703A1 (en) * 1977-04-07 1978-11-03 Sundstrand Corp LUBRICATION EQUIPMENT OF A HERMETIC COMPRESSOR
FR2456233A1 (en) * 1979-05-10 1980-12-05 Carrier Corp OIL RETURN CIRCUIT, PARTICULARLY FOR THE COMPRESSOR OF A REFRIGERATION PLANT

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE478577C (en) * 1927-08-07 1929-06-28 Hubert Dickmann Oil guide in compressors or the like
US3465953A (en) * 1966-10-28 1969-09-09 Carrier Corp Compressor lubrication arrangement
FR2013824A1 (en) * 1968-07-26 1970-04-10 Copeland Refrigeration
GB1244105A (en) * 1969-02-04 1971-08-25 Bitzer Kuehlmaschb G M B H Reciprocating piston compressors
US3713513A (en) * 1971-06-10 1973-01-30 Fedders Corp Crankcase evacuation and oil return system
DD96553A1 (en) * 1972-03-16 1973-03-20
FR2386703A1 (en) * 1977-04-07 1978-11-03 Sundstrand Corp LUBRICATION EQUIPMENT OF A HERMETIC COMPRESSOR
FR2456233A1 (en) * 1979-05-10 1980-12-05 Carrier Corp OIL RETURN CIRCUIT, PARTICULARLY FOR THE COMPRESSOR OF A REFRIGERATION PLANT

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986007415A1 (en) * 1985-06-14 1986-12-18 Basseggio Narcizo Osorio Crankcase chamber
US4895498A (en) * 1985-06-14 1990-01-23 Basseggio Narcizo O Crank case chamber

Also Published As

Publication number Publication date
FR2504607B1 (en) 1986-03-07
FR2504607A1 (en) 1982-10-29

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Inventor name: GALIAN, FRANCOIS