EP0046142A2 - Motorgetriebene Kompressoreinheit, insbesondere in hermetisch gekapselten Verdichtern bei Kältemaschinen - Google Patents

Motorgetriebene Kompressoreinheit, insbesondere in hermetisch gekapselten Verdichtern bei Kältemaschinen Download PDF

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Publication number
EP0046142A2
EP0046142A2 EP81830119A EP81830119A EP0046142A2 EP 0046142 A2 EP0046142 A2 EP 0046142A2 EP 81830119 A EP81830119 A EP 81830119A EP 81830119 A EP81830119 A EP 81830119A EP 0046142 A2 EP0046142 A2 EP 0046142A2
Authority
EP
European Patent Office
Prior art keywords
piston
pin
connecting rod
motor
crank pin
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Withdrawn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
EP81830119A
Other languages
English (en)
French (fr)
Other versions
EP0046142A3 (de
Inventor
Fausto Forghieri
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.)
Indesit Industria Elettrodomestici Italiana SpA
Original Assignee
Indesit Industria Elettrodomestici Italiana 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 Indesit Industria Elettrodomestici Italiana SpA filed Critical Indesit Industria Elettrodomestici Italiana SpA
Publication of EP0046142A2 publication Critical patent/EP0046142A2/de
Publication of EP0046142A3 publication Critical patent/EP0046142A3/de
Withdrawn legal-status Critical Current

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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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122—Cylinder block
    • 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
    • F04B39/14—Provisions for readily assembling or disassembling

Definitions

  • the present invention relates to a motor-driven compressor unit, particularly for airtight compressors on fluid compressing or refrigerating machines, comprising: a main part with at least a first and second cylindrical seat at right-angles to each other; a piston with at least one hole in its side walls and which slides inside the said first cylindrical seat; a crankshaft with a crank pin which rotates in the said second cylindrical seat; a connecting rod for converting the circular movement created by the crank pin into a back-and-forth movement of the said piston, the said connecting rod having at least a first and second eye, the first for connecting the said connecting rod to the said piston by means of at least one pin inserted inside the said hole of the said piston and in the said first eye, and the second inserting the said connecting rod inside the s&id crank pin.
  • the connecting rod has a side slot and eye for the crank with a larger diameter than on the crank pin.
  • the connecting rod is then turned round the pin and inserted, through the said slot, into the crank pin.
  • the difference between the diameters is then adjusted by means of a bushing.
  • connection is made by assembling a ball joint between the connecting rod and piston so that the crankshaft can be assembled first in the main part of the compressor followed by the connecting rod-piston assembly.
  • the connecting rod is then lowered and inserted into the crank pin which has a smaller diameter than the eye on the connecting rod.
  • a clearance bushing is assembled between the connecting rod and crank pin.
  • the eye of the connecting rod on the crank side is made very flat with s. short crank pin smaller in diameter than the eye. This is done so that it cannot be inserted straight into the eye to which it must be connected using a bushing.
  • the crankshaft is inserted first, followed by the piston-pin-connecting rod assembly, the connecting rod being passed over the crank pin which is short enough not to interfere with it.
  • crankshaft after the connecting rod-piston assembly.
  • the shaft is generally longer with a smaller diameter than the part inserted into the main part on the compressor or the eccentric part of the crank so it can be inserted into the main part through the eye on the connecting rod.
  • the flywheel is on the oppcsite side of the crankshaft as compared with the previous solutions which means a second support is needed for the crankshaft. This is assembled after the shaft thus resulting in greater friction, more machining and increased weight of the overall mechanism.
  • the aim of the present invention is therefore to overcome the above drawbacks by providing a means of constructing a mctor-driven compressor unit which enables the component parts of the refrigerating fluid compression system to be assembled quickly and easily.
  • a further aim of the present invention is to overcome the difficulties involved in machining the said component parts.
  • a further aim is to reduce the weight and number of the said component parts so as to reduce the friction and bending moments exerted on the crankshaft.
  • the present invention relates to a motor-driven compressor unit, particularly for airtight compressors on fluid compressing or refrigerating machines, comprising: a main part with at least a first and second cylindrical seat at right-angles to each other; a piston with at least one hole in its side walls and which slides inside the said first cylindrical seat; a crankshaft with a crank pin which rotates in the said second cylindrical seat; a connecting rod for converting the circular movement created by the crank pin into a back-and-forth movement of the said piston, the said connecting rod having at least a first and second eye, the first for connecting the said connecting rod to the said piston by means of at least one pin inserted inside the said hole on the said piston end in the said first eye, and the second for inserting the said connecting rod inside the said crank pin, characterised by the fact that the said crank pin constitutes one of two ends of the said crankshaft, that the said connecting rod is a single piece, that the said crank pin and the said second eye are connected directly with no component parts in
  • Number 1 in Fig. 1 indicates the main part on the motor-driven compressor unit. This comprises a cylindrical seat for piston 2 and a seat for crankshaft 3 which, in turn, comprises crank pin 4. Connecting rod 5 between piston 2 and crankshaft 3 has one eye (6) for accomodating crank pin 4 and another eye (7) for accomodating pin 8. The latter also passes through holes 9 in piston 2 for connecting rod 5 and piston 2.
  • crankshaft 3 is turned until crank pin 4 reaches the bottom dead centre as shown in the diagram.
  • Connecting rod 5 is then inserted horizontally, as shown in the diagram, through opening 10.
  • Piston 2 is then inserted into the cylindrical seat of main part 1, starting from the position shown in the diagram, until holes 9 coincide with eye 7 of connecting rod 5.
  • pin 8 is assembled and secured using one of the techniques described later on.
  • cover 12 including valves not shown in the diagram, is fitted to main part 1 using screws 11.
  • Fig. 2 shows the Fig. 1 parts after assembly using the same numbering system.
  • Fig. 3 shows a top view of the arrangement already described with the component parts numbered in the same way as for Figs 1 and 2. Notice in particular the shape and position of opening 10 for assembling connecting rod 5. Piston 2 inside main part 1 of the motor-driven compressor is drawn with a dotted line.
  • crankshaft may be as short as possible with no need for a second support for the shaft on the crank pin side.
  • the number of component parts used and, consequently, also the weight of moving parts is reduced to a minimum in that both the crankshaft and connecting rod may have minimum diameters resulting in a big reduction in friction, machining and the bending moments exerted on the crankshaft.
  • Fig. 4 shows another possible arrangement of the present invention.
  • the component parts and numbers are the same as in the previous diagrams so only the changes will be described.
  • piston 2 has been made longer to bring the pin 8 seat area sufficiently clear of main part 1 (opening 10 is no longer needed) so as to enable the parts to be assembled in the same way as previously, i.e.: first crankshaft 3, then connecting rod 5, piston 2 from the main part (1) side, including the valves not shown and, finally, pin 8.
  • Figs 5 and 6 show a type of pin 8 that may be used with the present invention and how it is fitted inside piston 2.
  • Two slots (15) are milled on the . ends of pin 8 and two holes drilled in the piston so that pin 8 may be secured using one or two pins (13). One of these may even be inserted in piston 2 before it is assembled in its cylindrical seat.
  • Groove 16 and hole 17 are for lubricant.
  • Figs 7 and 8 show another possible type of pin 8 and how it is fitted inside piston 2. There is a blind hole (18) at each end so that pins 13 cannot go right through.
  • Fig. 9 shows another type of pin 8 with a groove (19) at each end for accomodating spring plates 14 securing the pin 8 to piston 2.
  • the -two grooves (19) are positioned so that, when the pin is inserted into the piston, they correspond with the gaps between the connecting rod and inside walls of the piston so that the spring plates can be inserted straight into the grooves on the pin with no need for slots in the walls of the piston.
  • Figs 10, 11 and 12 show other possible types of pins combining the features of the previous ones with; groove 19 for spring plate 14 and blind hole 18 for pin 13 (Fig. 10); groove 19 and milled slot 15 for pin 13 (Fig. 11); blind hole 18 and milled slot 15 (Fig. 12).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
EP81830119A 1980-07-31 1981-07-15 Motorgetriebene Kompressoreinheit, insbesondere in hermetisch gekapselten Verdichtern bei Kältemaschinen Withdrawn EP0046142A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6822980 1980-07-31
IT68229/80A IT1130814B (it) 1980-07-31 1980-07-31 Gruppo motocompressore specialmente per compressori ermetici di macchine pneumofore o frigorifere

Publications (2)

Publication Number Publication Date
EP0046142A2 true EP0046142A2 (de) 1982-02-17
EP0046142A3 EP0046142A3 (de) 1982-03-24

Family

ID=11308587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81830119A Withdrawn EP0046142A3 (de) 1980-07-31 1981-07-15 Motorgetriebene Kompressoreinheit, insbesondere in hermetisch gekapselten Verdichtern bei Kältemaschinen

Country Status (3)

Country Link
EP (1) EP0046142A3 (de)
ES (1) ES8301352A1 (de)
IT (1) IT1130814B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121417A3 (en) * 1983-03-22 1985-02-20 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
US4770058A (en) * 1985-03-08 1988-09-13 Empresa Brasileria de Compressors S/A Embraco Reciprocating piston compressor for small refrigerating machines and its assembly method
GB2211272A (en) * 1987-12-17 1989-06-28 Brasil Compressores Sa Reciprocating piston compressor for small refrigerating machines
WO1997001035A1 (en) * 1995-06-23 1997-01-09 Danfoss Compressors Gmbh Piston compressor
AU711534B2 (en) * 1997-09-24 1999-10-14 Panasonic Refrigeration Devices Singapore Pte. Ltd. Casted suction inlet
WO2001038736A1 (en) * 1999-11-23 2001-05-31 Thomas Industries Inc. Connecting rod with integral grease reservoir and bleed hole
US6401594B1 (en) 1999-11-23 2002-06-11 Thomas Industries Inc. Connecting rod with integral grease reservoir
JP2015113788A (ja) * 2013-12-12 2015-06-22 株式会社日立産機システム 空気圧縮機
CN107178486A (zh) * 2017-07-31 2017-09-19 安徽美芝制冷设备有限公司 往复式压缩机的装配方法
WO2017210809A1 (zh) * 2016-06-08 2017-12-14 谈宇 新传动结构节能压缩机
CN114738230A (zh) * 2022-04-15 2022-07-12 瑞立集团瑞安汽车零部件有限公司 水冷两级电动空气压缩机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107476950B (zh) * 2016-06-08 2024-02-27 谈宇 活塞力作功节能压缩机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE316462C (de) *
GB684298A (en) * 1950-04-27 1952-12-17 Bendix Westinghouse Automotive Improvements in or relating to pistons
FR1235771A (fr) * 1958-08-28 1960-07-08 Thomson Houston Comp Francaise Perfectionnements aux pistons de compresseurs
FR1272131A (fr) * 1960-08-10 1961-09-22 Thomson Houston Comp Francaise Perfectionnements apportés aux compresseurs à mouvement alternatif
GB954003A (en) * 1962-06-18 1964-04-02 Stal Refrigeration Ab A device for axially locking gudgeon pins in connecting rod and piston assemblies
FR2176271A5 (de) * 1972-03-17 1973-10-26 Gladieux Andre
DD106458A1 (de) * 1972-09-04 1974-06-12

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121417A3 (en) * 1983-03-22 1985-02-20 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
US4770058A (en) * 1985-03-08 1988-09-13 Empresa Brasileria de Compressors S/A Embraco Reciprocating piston compressor for small refrigerating machines and its assembly method
GB2211272A (en) * 1987-12-17 1989-06-28 Brasil Compressores Sa Reciprocating piston compressor for small refrigerating machines
DE3842766A1 (de) * 1987-12-17 1989-06-29 Brasil Compressores Sa Kolbenkompressor fuer kleine kuehlgeraete
GB2211272B (en) * 1987-12-17 1992-01-08 Brasil Compressores Sa Reciprocating piston compressor for small refrigerating machines
DE3842766C2 (de) * 1987-12-17 1998-04-16 Brasil Compressores Sa Kolbenkompressor für kleine Kühlgeräte und Verfahren zur Verbindung einer Kolbenstange eines solchen
WO1997001035A1 (en) * 1995-06-23 1997-01-09 Danfoss Compressors Gmbh Piston compressor
AU711534B2 (en) * 1997-09-24 1999-10-14 Panasonic Refrigeration Devices Singapore Pte. Ltd. Casted suction inlet
WO2001038736A1 (en) * 1999-11-23 2001-05-31 Thomas Industries Inc. Connecting rod with integral grease reservoir and bleed hole
US6327961B1 (en) 1999-11-23 2001-12-11 Thomas Industries Inc. Connecting rod with integral grease reservoir and bleed hole
US6401594B1 (en) 1999-11-23 2002-06-11 Thomas Industries Inc. Connecting rod with integral grease reservoir
JP2015113788A (ja) * 2013-12-12 2015-06-22 株式会社日立産機システム 空気圧縮機
WO2017210809A1 (zh) * 2016-06-08 2017-12-14 谈宇 新传动结构节能压缩机
CN107476952A (zh) * 2016-06-08 2017-12-15 谈宇 新传动结构节能压缩机
CN107178486A (zh) * 2017-07-31 2017-09-19 安徽美芝制冷设备有限公司 往复式压缩机的装配方法
CN107178486B (zh) * 2017-07-31 2019-09-06 安徽美芝制冷设备有限公司 往复式压缩机的装配方法
CN114738230A (zh) * 2022-04-15 2022-07-12 瑞立集团瑞安汽车零部件有限公司 水冷两级电动空气压缩机

Also Published As

Publication number Publication date
IT1130814B (it) 1986-06-18
ES504172A0 (es) 1982-12-01
EP0046142A3 (de) 1982-03-24
ES8301352A1 (es) 1982-12-01
IT8068229A0 (it) 1980-07-31

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Inventor name: FORGHIERI, FAUSTO