WO2015096848A1 - Vilebrequin à réglage de contrepoids facilité et procédé de réglage de contrepoids associé - Google Patents

Vilebrequin à réglage de contrepoids facilité et procédé de réglage de contrepoids associé Download PDF

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Publication number
WO2015096848A1
WO2015096848A1 PCT/EP2013/077904 EP2013077904W WO2015096848A1 WO 2015096848 A1 WO2015096848 A1 WO 2015096848A1 EP 2013077904 W EP2013077904 W EP 2013077904W WO 2015096848 A1 WO2015096848 A1 WO 2015096848A1
Authority
WO
WIPO (PCT)
Prior art keywords
crankshaft
counterweight
additional
mounting seat
reciprocating compressor
Prior art date
Application number
PCT/EP2013/077904
Other languages
English (en)
Inventor
Husnu Kerpicci
Kemal Sarioglu
Ahmet Refik Ozdemir
Serkan DORTKARDESLER
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to PCT/EP2013/077904 priority Critical patent/WO2015096848A1/fr
Priority to EP13818750.5A priority patent/EP3090177A1/fr
Priority to TR2014/15645A priority patent/TR201415645A2/tr
Publication of WO2015096848A1 publication Critical patent/WO2015096848A1/fr

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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
    • F04B39/0094—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
    • F04B39/14—Provisions for readily assembling or disassembling

Definitions

  • the present invention relates to a crankshaft suitable for use in a reciprocating compressor of a refrigeration appliance, in particular a domestic refrigerator, which has a variable refrigeration capacity.
  • a refrigeration appliance such as a domestic refrigerator typically utilizes a reciprocating compressor to cyclically convey the refrigerant from an evaporator to a condenser.
  • a conventional reciprocating compressor includes a cylinder block which has a compression chamber, a cylinder head which has an intake chamber and an exhaust chamber, a piston mechanism for compressing the refrigerant in the compression chamber and an electrical motor for driving the piston mechanism.
  • a valve plate is interposed between the cylinder block and the cylinder head. By virtue of the valve plate, the compression chamber is selectively brought into fluid connection with the intake chamber and the exhaust chamber.
  • the valve plate generally comprises an intake port and exhaust port.
  • the intake port and exhaust port are typically configured by diaphragm reed valves which allow the refrigerant to flow only in a single direction.
  • the intake chamber is located on a downstream side of the evaporator whereas the exhaust chamber is located on an upstream side of the condenser.
  • the piston mechanism includes a piston head which is arranged to reciprocate within the compression chamber, a connecting rod and a crankshaft which are serially coupled to each other.
  • the crankshaft is rotatably supported through a bearing formed into the cylinder block.
  • the electrical motor includes a stator and a rotor which are typically configured as an asynchronous motor or a brushless direct current motor.
  • the rotor is fixed to the crankshaft of the piston mechanism.
  • the intake port fluidly connects the intake chamber with the compression chamber. Thereby, the refrigerant is sucked into the chamber.
  • the exhaust port fluidly connects the compression chamber with the exhaust chamber. Thereby, the compressed refrigerant is discharged out of the compression chamber.
  • a counterweight is usually integrally formed with the crankshaft to reduce the forces on the bearings and to diminish the vibrations.
  • CN201433875 discloses a crankshaft for use in a reciprocating compressor of refrigeration appliance.
  • This crankshaft has a counterweight which is integrally formed with the shaft. The size of the counterweight is adjusted through processing the crankshaft.
  • An objective of the present invention is to provide a crankshaft which overcomes the aforementioned drawbacks of the prior art and which facilities adjustment of the counterweight in accordance with a target refrigeration capacity.
  • crankshaft according to the present invention as defined in claim 1, the counterweight assembly according to claim 10, and the method of adjusting a balance of the crankshaft according to claim 15. Further achievements have been attained by the subject-matters respectively defined in the dependent claims.
  • the crankshaft according to the present invention comprises a mounting seat configured to hold through the action of magnetic force one or more than one additional counterweight each having a mass and shape determined in accordance with a target refrigeration capacity of the reciprocating compressor.
  • the mounting seat is made of a ferromagnetic material.
  • at least one additional counterweight is a permanent magnet whereas each of the other additional counterweights is made of a permanent magnet or a ferromagnetic article.
  • a balance of the crankshaft can be precisely adjusted in accordance with a target refrigeration capacity of the reciprocating compressor.
  • a permanent magnet can be singly used or combined with one or more than one permanent magnet and/or one or more than one ferromagnetic article to obtain a cumulative counterweight that is designated for the target refrigeration capacity.
  • the mounting seat is made of a ferromagnetic material, however, in an embodiment, the mounting seat is permanently magnetized to improve the attraction between the additional counterweights and the mounting seat.
  • the mounting seat itself functions a main counterweight.
  • a center of mass of the mounting seat is radially offset from the rotation axis of the crankshaft and also radially opposed to the pin.
  • the mounting seat is configured by a surface of a main counterweight formed on the crankshaft.
  • the mounting seat does not function as a counterweight, i.e., its center of mass is located on the rotation axis.
  • an upper surface of the main counterweight is parallel to an axial direction.
  • the counterweights can be stacked onto the upper surface to obtain the necessary cumulative counterweight.
  • the pin has an extended portion which defines a gap in an axial direction so as to secure a passage for the additional counterweights underneath the connecting rod and the piston head.
  • the gap is predetermined in accordance with a maximum height of the additional counterweights that need to be piled up to achieve balance at a highest target refrigeration capacity.
  • the additional counterweights are attached solely by using magnetic forces.
  • the additional counterweights can be quickly and firmly assembled with the crankshaft.
  • any auxiliary fixing means like screws, rivets and the like become superfluous.
  • Such auxiliary means are generally vulnerable to break down because of the relatively high forces which are generated during a rotation of the crankshaft.
  • such auxiliary fixing means can be reinforced as a counter measure. However, this incurs additional costs and prolongs the manufacturing process.
  • the additional counterweights save time and cost.
  • Figure 1 – is a schematic view of a crankshaft according to an embodiment of the present invention.
  • Figure 2 – is a schematic view of the crankshaft with an additional counterweight according to another embodiment of the present invention.
  • Figure 3 – is a schematic view of the crankshaft with two additional counterweights according to another embodiment of the present invention.
  • Figure 4 – is a schematic view of the crankshaft with three additional counterweights according to another embodiment of the present invention.
  • Figure 5 – is a schematic partial view of a reciprocating compressor which includes a crankshaft with three additional counterweights according to an embodiment of the present invention
  • Figure 6 – is a schematic exploded partial view of the reciprocating compressor shown in Fig. 5;
  • Figure 7 – is a schematic view of a reciprocating compressor according to an embodiment of the present invention.
  • the crankshaft (1) is suitable for use in a reciprocating compressor (2) of a refrigeration appliance (not shown).
  • the reciprocating compressor (2) has a variable refrigeration capacity.
  • the crankshaft (1) comprises a shank (3) which has an overhang portion (4) and a pin (5) for pivotably attaching a connecting rod (6) which is to be coupled to a piston head (7).
  • the pin (5) is formed eccentrically with respect to a rotation axis (Ax) of the shank (3) on the overhang portion (4) (Figs. 1 to 7).
  • the crankshaft (1) further comprises a mounting seat (17) configured to hold through the action of magnetic force one or more than one additional counterweight (8) which has a mass and shape determined in accordance with a target refrigeration capacity of the reciprocating compressor (2).
  • the mounting seat (17) is made of a ferromagnetic material.
  • At least one additional counterweight is a permanent magnet (8a).
  • Each of the other additional counterweights (8) is made of a permanent magnet (8a) or a ferromagnetic article (8b) (Figs. 1 to 7).
  • the mounting seat (17) is configured by a main counterweight (9) which is formed by the overhang portion (4). A center of mass of the main counterweight (9) is radially opposed to the pin (5) and radially offset from the rotation axis (Ax).
  • the mounting seat (17) is configured by a surface (10) of the main counterweight (9) (Figs. 1 to 7).
  • one or more than additional counterweight (8) is placed on the main counterweight (9) to attain the proper amount of counterweight (8) necessary for the target refrigeration capacity of the reciprocating compressor (2).
  • a normal of the upper surface (10) of the main counterweight (9) is parallel to an axial direction (Ax) (Figs. 1 to 7).
  • one or more than one additional counterweights (8) are stacked upon each other on the surface (10) of the main counterweight (9).
  • the pin (5) includes an upper portion (5a) and a lower portion (5b).
  • the upper portion (5a) is suitable for pivotably attaching the connecting rod (6).
  • the lower portion (5b) is arranged below the upper portion (5a).
  • the upper portion (5b) spans a gap (11) in the axial direction (Ax) to secure an unimpeded passage of the one or more than one additional counterweight (8) being stacked on each other on the mounting seat (17) underneath the connecting rod (6) and the piston head (7) (Fig. 1 to 7).
  • the shank (3) rotates, the stack of additional counterweights (8) is conveyed underneath the connecting rod (6) and the piston head (7) without interfering with them.
  • a height of the lower portion (5b) is slightly larger than a maximum total height of the additional counterweights (8) which can be stacked onto one another on the mounting seat (17) (Figs. 1 to 7).
  • the crankshaft (1) can be modified in accordance with a plurality of different target refrigeration capacities.
  • the mounting seat (17) is configured to form-fittingly contact the additional counterweight (8) (Figs. 1 to 7).
  • the additional counterweights (8) are firmly attracted to the mounting seat (17) and prevented from being dislocated under the influence of centripetal forces during rotation of the crankshaft (1).
  • the mounting seat (17) is flat (Figs. 1 to 7).
  • counterweights (8) have accordingly flat surfaces.
  • the mounting seat (17) has an outer contour which matches the outer contour of the additional counterweight (8) (Figs. 1 to 7).
  • the outer contour of the mounting seat (17) is semicircular shaped (Figs. 1 to 7).
  • the present invention also provides a counterweight assembly for use with the crankshaft (1).
  • the counterweight assembly comprises one or more than one additional counterweight (8) for separate or combined use with the crankshaft (1) to adjust a balance thereof in accordance with the target refrigeration capacity.
  • Each of the counterweight (8) has a shape and mass respectively predetermined in accordance with the variable refrigeration capacity.
  • At least one additional counterweight (8) is made of a permanent magnet (8a) and each of the other additional counterweights (8) is made of a permanent magnet (8a) or a ferromagnetic article (8b) (Fig. 1 to 7).
  • the permanent magnet (8a) is one of a rare earth magnet, a ferrite magnet, an al-ni-co magnet.
  • the ferromagnetic article (8b) is an iron alloy.
  • Each additional counterweight (8) is provided in form of a thin plate (Figs. 1 to 7).
  • each additional counterweight (8) is semicircular shaped (Figs. 1 to 7).
  • the present invention also provides a reciprocating compressor (2) which comprises a crankshaft (1) of the present invention.
  • the reciprocating compressor (2) further comprises an electrical motor (12) which includes a stator (12a) and a rotor (12b).
  • the rotor (12b) is fixed onto the shank (3).
  • the reciprocating compressor (2) further comprises a cylinder block (13) which has a compression chamber and a cylinder head which has an exhaust chamber and an intake chamber.
  • the reciprocating compressor (2) further comprises a casing (14).
  • the cylinder block (13) is arranged on springs (15) and mounted on a bottom of the casing (14).
  • the bottom of the casing (14) functions as a sump of oil (15) for lubricating the crankshaft (1) and the other moving parts such as the connecting rod (6) and the piston (7) (Figs. 1 to 7).
  • the reciprocating compressor (2) comprises one or more than one additional counterweight (8) stacked on the mounting seat (17). At least one additional counterweight (8) is a permanent magnet (8a). Each of the other additional counterweights (8) is made of a permanent magnet (8a) or a ferromagnetic article (8b). In different version of this embodiment, the reciprocating compressor (2) respectively comprises 1 to 3 additional counterweights (8), wherein each configuration corresponds to a different refrigeration capacity (Figs. 2 to 4).
  • the reciprocating compressor (2) comprises no additional counterweight (Fig. 1).
  • the refrigeration appliance is a domestic refrigerator which comprises the reciprocating compressor (2) and a control unit (not shown) which is configured to operate the electrical motor (12) of the reciprocating compressor (2) in accordance with the target refrigeration capacity.
  • the present invention also provides a method of adjusting a balance of the crankshaft (1).
  • the method comprises:
  • the method further comprises:
  • the mounting seat (17) is made of a ferromagnetic material. At least one additional counterweight is a permanent magnet (8a). Each of the other additional counterweights is made of a permanent magnet (8a) or a ferromagnetic article (9b).
  • the required amount of additional counterweights (8) can be firmly and quickly assembled with the crankshaft (1) by using magnetic forces. Thereby, the same crankshaft (1) of the present invention can be reliably and efficiently installed into a reciprocating compressor (2) which has a desired refrigeration capacity.

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

Abstract

La présente invention concerne un vilebrequin (1) qui est adapté à être utilisé dans un compresseur alternatif (2) d'un appareil frigorifique, le compresseur alternatif (2) présentant une puissance frigorifique variable. Le vilebrequin (1) comprend un arbre (3) qui comprend une partie en surplomb (4) et une broche (5) permettant de fixer de façon pivotante une bielle (6) qui est accouplée à une tête de piston (7). La broche (5) est formée sur la partie en surplomb (4) de façon excentrique par rapport à un axe de rotation (Ax) de l'arbre (3). Le vilebrequin (1) selon la présente invention comprend en outre un siège de montage (17) conçu pour maintenir sous l'action d'une force magnétique un ou plusieurs contrepoids supplémentaires (8) qui présentent une masse et une forme déterminées en fonction d'une puissance frigorifique cible du compresseur alternatif (2).
PCT/EP2013/077904 2013-12-23 2013-12-23 Vilebrequin à réglage de contrepoids facilité et procédé de réglage de contrepoids associé WO2015096848A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/EP2013/077904 WO2015096848A1 (fr) 2013-12-23 2013-12-23 Vilebrequin à réglage de contrepoids facilité et procédé de réglage de contrepoids associé
EP13818750.5A EP3090177A1 (fr) 2013-12-23 2013-12-23 Vilebrequin à réglage de contrepoids facilité et procédé de réglage de contrepoids associé
TR2014/15645A TR201415645A2 (tr) 2013-12-23 2014-12-23 Karşı ağırlık ayarlaması kolaylaştırılan bir krank ve karşı ağırlık ayarlama yöntemi.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/077904 WO2015096848A1 (fr) 2013-12-23 2013-12-23 Vilebrequin à réglage de contrepoids facilité et procédé de réglage de contrepoids associé

Publications (1)

Publication Number Publication Date
WO2015096848A1 true WO2015096848A1 (fr) 2015-07-02

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Application Number Title Priority Date Filing Date
PCT/EP2013/077904 WO2015096848A1 (fr) 2013-12-23 2013-12-23 Vilebrequin à réglage de contrepoids facilité et procédé de réglage de contrepoids associé

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EP (1) EP3090177A1 (fr)
TR (1) TR201415645A2 (fr)
WO (1) WO2015096848A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3995695A1 (fr) * 2020-11-06 2022-05-11 Arçelik Anonim Sirketi Compresseur doté d'une connexion améliorée de poids de vilebrequin et de poids supplémentaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315463C1 (de) * 1993-05-10 1994-05-26 Daimler Benz Ag Im Kurbeltrieb eines Hubkolbenmotors integriertes Stromerzeugungsaggregat
CN201433875Y (zh) 2009-04-29 2010-03-31 杭州钱江压缩机有限公司 一种压缩机曲轴
CN202091145U (zh) * 2011-05-18 2011-12-28 加西贝拉压缩机有限公司 制冷压缩机用控制润滑油飞溅的曲轴配重结构
JP2012139045A (ja) * 2010-12-27 2012-07-19 Daikin Ind Ltd ロータ、モータおよび圧縮機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315463C1 (de) * 1993-05-10 1994-05-26 Daimler Benz Ag Im Kurbeltrieb eines Hubkolbenmotors integriertes Stromerzeugungsaggregat
CN201433875Y (zh) 2009-04-29 2010-03-31 杭州钱江压缩机有限公司 一种压缩机曲轴
JP2012139045A (ja) * 2010-12-27 2012-07-19 Daikin Ind Ltd ロータ、モータおよび圧縮機
CN202091145U (zh) * 2011-05-18 2011-12-28 加西贝拉压缩机有限公司 制冷压缩机用控制润滑油飞溅的曲轴配重结构

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3995695A1 (fr) * 2020-11-06 2022-05-11 Arçelik Anonim Sirketi Compresseur doté d'une connexion améliorée de poids de vilebrequin et de poids supplémentaire

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Publication number Publication date
EP3090177A1 (fr) 2016-11-09
TR201415645A2 (tr) 2015-07-21

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