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WO2020115694A1 - Compresseur - Google Patents

Compresseur Download PDF

Info

Publication number
WO2020115694A1
WO2020115694A1 PCT/IB2019/060475 IB2019060475W WO2020115694A1 WO 2020115694 A1 WO2020115694 A1 WO 2020115694A1 IB 2019060475 W IB2019060475 W IB 2019060475W WO 2020115694 A1 WO2020115694 A1 WO 2020115694A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
niche
compressor
oil
passage
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.)
Ceased
Application number
PCT/IB2019/060475
Other languages
English (en)
Inventor
Mauro Dallai
Mario Dorin
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.)
Officine Mario Dorin SpA
Original Assignee
Officine Mario Dorin SpA
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 Officine Mario Dorin SpA filed Critical Officine Mario Dorin SpA
Priority to CN201980080808.6A priority Critical patent/CN113167265B/zh
Priority to US17/311,566 priority patent/US20220025876A1/en
Priority to EP19831908.9A priority patent/EP3891395A1/fr
Publication of WO2020115694A1 publication Critical patent/WO2020115694A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • 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
    • F04B39/0094—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 crankshaft
    • 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
    • F04B39/0284—Constructional details, e.g. reservoirs in the casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/02—Compressor arrangements of motor-compressor units

Definitions

  • the present invention relates to compression systems for cooling systems and/or air conditioning systems and/or heat pumps or the like; more in particular, the object of the present invention is a compressor for cooling systems and/or air conditioning systems and/or heat pumps, of the reciprocating type, preferably of the semi-hermetic type.
  • refrigerating semi-hermetic compressors are characterized by a casing with two chambers, respectively a compression chamber (with oil box) and a chamber for the motor of the compressor.
  • the chambers are separated by means of a central support with two bronze bushes for the shaft transmitting motion from the motor to the slider-crank mechanism of the compression section and the electric motor.
  • the oil pumped by a gear pump is conveyed to the central support through a duct inside the shaft.
  • the oil is supplied to an annular recess provided between the two bronze bushes.
  • Part of the oil is conveyed in the bronze bush on the side of the slider-crank mechanism and directly exits in the oil box.
  • a similar quantity is conveyed towards the bronze bush motor side and then discharged motor side.
  • the object of the present invention is to provide a compressor for cooling systems and/or conditioning systems and/or heat pumps, of the reciprocating type, preferably of the semi-hermetic type, to reduce or eliminate the amount of oil lubricating the support of the transmission shaft exiting into the chamber where the compressor actuating motor is housed.
  • a compressor for cooling systems and/or air conditioning systems and/or heat pumps comprising a casing, inside which two chambers are defined, respectively a first chamber corresponding to the compression section, which, in turn, comprises at least one compression piston, a corresponding slider-crank mechanism for moving the piston and an oil box, and a second chamber for the motor of the compressor, a transmission shaft being provided, operatively connected to said motor and to said slider-crank mechanism, said chambers being separated by means of a support portion of said shaft, said support portion having a passage for said shaft, in said passage being provided at least one anti-friction bushing supporting said shaft, an oil supply duct being provided at least partially inside said shaft, the duct having an end opening exiting in the space between said shaft and said passage so as to allow the lubrication of said at least one anti-friction bushing and said shaft, characterized by comprising
  • the niche can be provided on the surface, preferably the internal surface, of the anti-friction bushing.
  • the niche may be provided on the surface of said transmission shaft; the niche is preferably an annular recess or a niche extending all around the axis of the shaft.
  • the niche is preferably separated from the at least an end opening of the oil supply duct, i.e. the end opening is not inside the niche, i.e. it is outside the niche. Practically, the end opening exits outside the niche.
  • the niche is open directly on the discharge channel.
  • the discharge channel is provided on the inner surface of the passage.
  • the discharge channel is provided below the transmission shaft.
  • the discharge channel and the niche are directly connected by means of a through hole provided through the at least one anti-friction bushing.
  • the discharge channel is provided on the surface of the support portion; preferably, the discharge channel has three closing sides formed by the support portion and a fourth side closed by the at least one anti-friction bushing.
  • the compressor comprises a ring for limiting the oil leakage, provided around said shaft in a position opposite to said at least one end opening of the oil duct and with respect to said niche.
  • the oil leakage limiting ring is arranged in a seat provided at the end of said passage facing said second chamber.
  • the compressor comprises two anti-friction bushings arranged in series after each other in the passage.
  • the compressor comprises a further niche where said one said end opening exits, provided in the form of annular recess on the shaft, or a further niche extending all around the shaft.
  • the compressor comprises a further end opening directly exiting on the surface of the shaft into contact with the at least one anti-friction bushing.
  • Fig. l is a longitudinal cross section of the compressor of the invention.
  • Fig. 2 is an enlargement of a portion of Fig. 1 relating to the central support area of the transmission shaft;
  • Fig. 3 is a variant, according to the invention, of the central support area of the transmission shaft.
  • a compressor for cooling systems and/or conditioning systems and/or heat pumps of the reciprocating and semi- hermetic type, according to the invention is indicated as a whole with number 10.
  • the compressor 10 comprises a casing 11, inside which two chambers are defined, respectively a first chamber 12 corresponding to the compression section, and a second chamber 13 where the electric motor 14 is provided, actuating the compressor.
  • the compression section of the first chamber 12 comprises one or more cylinders 15 for corresponding one or more pistons 16 moved by means of respective one or more slider-crank mechanisms 17.
  • the first chamber defines, in the inside thereof, a lubricating oil box 12 A.
  • Each slider-crank mechanism 17 is operatively connected to a transmission shaft 18, which is in turn operatively connected to the electric motor 14.
  • the two chambers 12 and 13 are separated by means of a wall, i.e. a support portion 19 for the transmission shaft 18.
  • the support portion 19 has a passage 20, i.e. a substantially cylindrical hole, to allow the shaft to be provided between the two chambers 12 and 13.
  • first and a second anti-friction bushings 21A and 21B are arranged in series, i.e. two bronze bushes of substantially equal diameter and thickness, supporting the shaft 18 and allowing the rotation thereof, in a known manner.
  • the compressor 10 comprises a lubricating system comprising, among the various components, an oil supply duct 22 provided at leastpartially inside the transmission shaft 18.
  • the duct 22 has a first end opening 23 exiting in the space between the shaft 18 and the passage 20, and more in particular in a first niche 24 in the form of annular recess on the surface of the shaft 18, i.e. extending all around the shaft.
  • the first niche 24 is provided in a position in correspondence of the two facing ends of the two anti -friction bushings 21. These ends are put over the first annular niche 24.
  • the duct 22 allows lubricating the anti-friction bushings 21 and the shaft 18.
  • the oil supply duct 22 comprises a second end opening 25 directly exiting on the surface of the shaft 18, in contact with the first anti-friction bushing 21 A.
  • a second annular niche 26 is provided on the surface of the shaft 18, in a position between the end of the passage 20 facing the second chamber 13 and the first end opening 23 of the duct 22.
  • the second niche 26 is an annular recess provided on the surface of the shaft 18 and extends all around the shaft.
  • first end opening 23 of the duct 22 does not exit in the second niche, it directly exits outside the second niche 26.
  • a discharge channel 27 is provided for discharging the oil, operatively connected to the second niche 26 and the oil box 12 A.
  • the channel 27 has three closing sides formed by the body of the support portion (as provided thereon) and a fourth side closed by means of the second anti-friction bushing 2 IB and the first anti-friction bushing 21 A.
  • the discharge channel 27 and the second niche 26 are directly connected by means of a through hole 30 provided through the second anti-friction bushing 21B.
  • the oil discharge channel 27 may be provided laterally to the shaft, or, in less preferred embodiments, above the shaft.
  • FIG. 3 shows a variant of the central area of the compressor according to the invention, where both the first niche, now indicated with number 124, and the second niche, now indicated with number 126, are provided on the second anti-friction bushing 2 IB, thus avoiding to excessively working the surface of the shaft 18.
  • the first niche 124 is closed only by means of the second bushing 21B. In other examples, the first niche 124 may be closed only by means of the first bushing 21 A. [0039] Obviously, examples may be also provided, wherein the first niche is provided on the first or the second bushing and the second niche is provided on the shaft, or vice versa.
  • a seat 31 is provided for positioning a ring 32 limiting the oil leakage towards the second chamber 13, i.e the ring is provided in opposite position to the first end opening of the oil duct with respect to the second niche 26.
  • the lubricating oil is supplied, under pressure, in the oil supply duct 22.
  • the oil achieves the first and the second end opening, and is distributed between the bushings 21 and the inner surface of the passage 20 and the shaft 18.
  • the oil achieves the second niche 26, it loses pressure and passes into the discharge channel 27, for being discharged into the oil box 12A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L'invention concerne un compresseur alternatif (10) comprenant un boîtier (11), à l'intérieur duquel deux chambres sont définies, respectivement une première chambre (12) correspondant à la section de compression, qui, à son tour, comprend au moins un piston (16), un mécanisme à coulisse-manivelle (17) et une boîte à huile, ainsi qu'une seconde chambre (13) pour le moteur (14) du compresseur. Un arbre de transmission (18) est prévu, relié de manière fonctionnelle audit moteur et audit mécanisme à coulisse-manivelle. Lesdites chambres sont séparées par une partie de support (19) dudit arbre, ladite partie de support ayant un passage (20) pour ledit arbre, au moins une bague anti-frottement (21) étant disposée dans ledit passage pour supporter ledit arbre. Un conduit d'alimentation en huile (22) est disposé au moins partiellement à l'intérieur dudit arbre, le conduit (22) ayant au moins une ouverture d'extrémité (23, 25) sortant dans l'espace entre ledit arbre et ledit passage de manière à permettre la lubrification de ladite au moins une bague anti-frottement et dudit arbre. Une niche (24, 26) est disposée entre l'extrémité dudit passage (20) en regard de ladite deuxième chambre (13) et ladite ouverture d'extrémité (23, 25) dudit conduit. Un canal d'évacuation (27) est relié de manière fonctionnelle à ladite niche et à ladite boîte à huile, de telle sorte que l'huile lubrifiant la bague anti-frottement (21) et provenant de l'ouverture d'extrémité soit dépressurisée et adaptée pour revenir dans ladite boîte à huile, éliminant ou limitant ainsi la quantité d'huile atteignant la seconde chambre avec le moteur.
PCT/IB2019/060475 2018-12-07 2019-12-05 Compresseur Ceased WO2020115694A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201980080808.6A CN113167265B (zh) 2018-12-07 2019-12-05 压缩机
US17/311,566 US20220025876A1 (en) 2018-12-07 2019-12-05 Compressor
EP19831908.9A EP3891395A1 (fr) 2018-12-07 2019-12-05 Compresseur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800010888 2018-12-07
IT102018000010888 2018-12-07

Publications (1)

Publication Number Publication Date
WO2020115694A1 true WO2020115694A1 (fr) 2020-06-11

Family

ID=65861534

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/060475 Ceased WO2020115694A1 (fr) 2018-12-07 2019-12-05 Compresseur

Country Status (4)

Country Link
US (1) US20220025876A1 (fr)
EP (1) EP3891395A1 (fr)
CN (1) CN113167265B (fr)
WO (1) WO2020115694A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202300015909A1 (it) * 2023-07-27 2025-01-27 Officine Mario Dorin S P A Compressore alternativo a pistoni con circuito lubrificante a carter secco

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1156598A (fr) * 1956-07-31 1958-05-19 Pour Tous App Mecaniques Sa Perfectionnement au graissage des compresseurs semi-hermétiques
US20020159896A1 (en) * 2000-12-14 2002-10-31 Finnamore Roger A. Locomotive air compressor with outboard support bearing
EP1947335A2 (fr) * 2007-01-17 2008-07-23 Officine Mario Dorin S.p.A Compresseur alternatif, en particulier d'un type semi hermétique

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162360A (en) * 1962-05-14 1964-12-22 Carrier Corp Compressor venting system
US3248044A (en) * 1964-09-28 1966-04-26 Lennox Ind Inc Refrigerant compressor lubrication arrangement
IT8747731A0 (it) * 1987-03-16 1987-03-16 Stanzani Franco Struttura di gruppo motocompressore per fluidi frigorigeni
US5591011A (en) * 1995-09-18 1997-01-07 Carrier Corporation Multi-refrigerant compressor
US6609899B1 (en) * 2000-12-14 2003-08-26 Gardner Denver, Inc. Locomotive air compressor with outboard support bearing
US20080169157A1 (en) * 2002-12-02 2008-07-17 Wyker Christopher A Lip seal lubrication reservoir and method of level control
US20080025658A1 (en) * 2005-11-14 2008-01-31 Brp-Rotax Gmbh & Co. Kg Friction-bearing assembly for a rotating shaft
DE102009006040A1 (de) * 2009-01-24 2010-07-29 Bock Kältemaschinen GmbH Verdichter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1156598A (fr) * 1956-07-31 1958-05-19 Pour Tous App Mecaniques Sa Perfectionnement au graissage des compresseurs semi-hermétiques
US20020159896A1 (en) * 2000-12-14 2002-10-31 Finnamore Roger A. Locomotive air compressor with outboard support bearing
EP1947335A2 (fr) * 2007-01-17 2008-07-23 Officine Mario Dorin S.p.A Compresseur alternatif, en particulier d'un type semi hermétique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202300015909A1 (it) * 2023-07-27 2025-01-27 Officine Mario Dorin S P A Compressore alternativo a pistoni con circuito lubrificante a carter secco
WO2025022471A1 (fr) * 2023-07-27 2025-01-30 Officine Mario Dorin S.P.A. Compresseur à piston alternatif à carter sec doté d'un circuit de lubrifiant

Also Published As

Publication number Publication date
CN113167265A (zh) 2021-07-23
US20220025876A1 (en) 2022-01-27
EP3891395A1 (fr) 2021-10-13
CN113167265B (zh) 2023-02-17

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