EP0686236B1 - Hermetischer verdichter mit hin- und hergehenden kolben - Google Patents

Hermetischer verdichter mit hin- und hergehenden kolben Download PDF

Info

Publication number
EP0686236B1
EP0686236B1 EP95906857A EP95906857A EP0686236B1 EP 0686236 B1 EP0686236 B1 EP 0686236B1 EP 95906857 A EP95906857 A EP 95906857A EP 95906857 A EP95906857 A EP 95906857A EP 0686236 B1 EP0686236 B1 EP 0686236B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
compressor
reciprocating
crankshaft
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.)
Expired - Lifetime
Application number
EP95906857A
Other languages
English (en)
French (fr)
Other versions
EP0686236A1 (de
Inventor
Dietmar Erich Bernhard Lilie
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.)
Empresa Brasileira de Compressores SA
Original Assignee
Empresa Brasileira de Compressores SA
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 Empresa Brasileira de Compressores SA filed Critical Empresa Brasileira de Compressores SA
Publication of EP0686236A1 publication Critical patent/EP0686236A1/de
Application granted granted Critical
Publication of EP0686236B1 publication Critical patent/EP0686236B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F04B39/0005—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 adaptations of pistons
    • F04B39/0022—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 adaptations of pistons piston rods
    • 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122—Cylinder block

Definitions

  • the present invention relates to a reciprocating compressor and particularly to a reciprocating compressor of the type comprising a housing, a cylinder block mounted inside the housing and defining a first and a second cylinder, a first piston reciprocating inside said first cylinder and being operatively mounted to an eccentric portion of a crankshaft, a second piston reciprocating inside the second cylinder and being operatively mounted to said eccentric portion, said second cylinder being disposed at 90° to the first cylinder, and further comprising a counterweight means being disposed diametrically opposite to the eccentric portion of said crankshaft and being designed such that its inertial force presents a component which is projected on a first axis parallel to the geometric axis of the first reciprocating piston and balances the inertial forces relative to said first piston and the component of inertial force of the eccentric portion projected on said first axis, and also presents a component projected on a second axis parallel to the geometric axis of the second reciprocating piston, balancing the inertial forces relative to said second piston and
  • the known reciprocating compressors comprise a connecting rod, whose smaller eye is articulated through a wrist pin to a piston, which reciprocates inside the cylinder of the compressor and whose larger eye is mounted to an eccentric end of a crankshaft, which is orthogonal to the piston stroke and whose other end supports the rotor of an electric motor, the stator of the motor being supported by a cylinder block lodging the bearing of the crankshaft, the cylinder block being mounted to a housing through springs, said housing being covered by a lid, defining a sealed unit.
  • the 60Hz component is not balanced. It is, at maximum, reduced by the provision of counterweights at the crankshaft or at the rotor of the motor of said compressors, in order to balance the levels of longitudinal and transversal vibrations of the housing. These counterweights, however, rotate together with the crankshaft and produce rotary forces in the system (figure 3) that are not balanced.
  • the motor-compressor assembly is mounted inside said housing through springs (figure 1).
  • Another problem refers, principally, to the transmission of vibrations from the motor-compressor assembly to the housing, through the discharge and suction tubes, which connect, respectively, the discharge muffler and suction muffler of these compressors to the housing.
  • said tubes should be sufficiently flexible.
  • a reciprocating compressor of the type comprising a housing, a cylinder block mounted inside the housing and defining a first and a second cylinder, a first piston, which reciprocates inside the first cylinder and which is operatively mounted to an eccentric portion of a crankshaft, a second piston reciprocating inside the second cylinder and being operatively mounted to said eccentric portion, said second cylinder being disposed at 90° to the first cylinder, and further comprising a counterweight means being disposed diametrically opposite to the eccentric portion of said crankshaft and being designed such that its inertial force presents a component, which is projected on a first axis parallel to the geometric axis of the first reciprocating piston and balances the inertial forces relative to said first piston and the component of inertial force of the crankshaft eccentric portion projected on said first axis and also presents a component projected on a second axis parallel to the geometric axis of the second reciprocating piston, balancing the inertial forces relative to said second piston and
  • the inventive construction of the compressor With the inventive construction of the compressor, the more intense component of the vibrations forces acting upon the motor-compressor assembly, which is the 60 Hz component, is eliminated, allowing said motor-compressor assembly to be fixedly mounted to the housing without requiring the provision of suspension springs as in the prior art constructions.
  • the inventive compressor allows the use of a housing of small dimension, besides the use of a shorter discharge tube and a simpler and direct suction tube, and can therefore well be provided in small refrigeration devices.
  • the inventive construction of the compressor also reduces the superheating of the suction gas as well as costs.
  • the second cylinder is incorporated to the cylinder. It is also advantageous if the reciprocating piston-connecting rod assemblies in an inventive compressor are designed such that they have identical inertial effects.
  • a motor-compressor assembly is suspended inside a hermetically sealed housing 1, through springs 2.
  • a cylinder block 3 of said motor-compressor assembly serves as a support for a stator 4 of the electric motor and presents a bearing 5, for supporting a crankshaft 6 which, in this construction, carries at the lower part thereof, the rotor 7 of said motor.
  • Said cylinder block 3 further lodges a cylinder 8, in which inside reciprocates a piston 9, driven by the rotation of the crankshaft 6, which is mounted by means of a connecting rod 10 to a crankshaft eccentric portion 11, which is provided at an upper end portion 6a of said crankshaft 6 and which has a free upper end 12.
  • the counterweight 13 is calculated, in such a way that, in the upper and lower dead point conditions, the force produced by said counterweight 13 acts in a system of forces including the piston 9 and the crankshaft eccentric portion 11, in order to balance the inertial forces relative to said elements.
  • the hermetic compressor of the present invention has a cylinder block 20, lodging a first cylinder 21 and a second cylinder 22, each of said cylinders respectively lodging first and second reciprocating pistons 31, 32, both driven by the crankshaft eccentric portion 11 mounted to the crankshaft 6.
  • the cylinders 21,22 are disposed one from the other by 90°, each piston being driven by the crankshaft eccentric portion 11 through a respective connecting rod 23, 24.
  • the force balance condition is achieved by using reciprocating piston-connecting rod assemblies having identical inertial effects, obtained, in the illustrated construction, with identical reciprocating piston-connecting rod assemblies.
  • said assembly consisting of the second cylinder 22 and second piston 32 may be formed in such a way as to be able to receive a larger eye from each of said connecting rods 23, 24.
  • the second reciprocating piston 22 when the first reciprocating piston 21 is at the upper dead point condition, the second reciprocating piston 22 will be at one of the 1/4 and 3/4 positions of the piston cycle, said positions being a relative function between the respective cylinders.
  • the inertial forces acting upon the piston-crankshaft eccentric portion assembly are balanced, i.e., the summing of the inertial force F p1 of the first piston 31, with the component F ex of the inertial force F e of the crankshaft eccentric portion projected on an axis X, parallel to the geometric axis of the first cylinder 21 is equivalent to the component F cwx of the inertial force F cw of a counterweight 33 on said axis X, whereas the summing of the inertial force F p2 of the second reciprocating piston 32 with the component F ey of the inertial force F e of the crankshaft eccentric portion, projected on an axis Y, parallel to the geometric axis of the second cylinder 22, is equivalent to the component F cwy of the centrifugal force F cw of the counterweight 33 onto said axis Y.
  • This balance means that, mathematically, the following equations should be simultaneously

Landscapes

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

Claims (3)

  1. Verdichter mit hin- und hergehenden Kolben der Art mit einem Gehäuse, einem Zylinderblock, der innerhalb des Gehäuses angeordnet ist und einen ersten und einen zweiten Zylinder (21,22) festlegt, mit einem ersten Kolben (31), der innerhalb des ersten Zylinders (21) hin- und herläuft und zu seiner Betätigung an einem exzentrischen Abschnitt (11) einer Kurbelwelle (6) befestigt ist, mit einem zweiten Kolben (32), der innerhalb des zweiten Zylinders (22) hin- und herläuft und zu seiner Betätigung mit dem exzentrischen Abschnitt (11) verbunden ist, wobei der zweite Zylinder (22) unter 90° zum ersten Zylinder (21) angeordnet ist, und ferner mit Gegengewichtsmitteln (13), die direkt gegenüber dem exzentrischen Abschnitt (11) der Kurbelwelle angebracht und so ausgebildet sind, daß ihre Trägheitskraft eine Komponente aufweist, die auf einer ersten Achse (X) parallel zu der geometrischen Achse des ersten hin- und hergehenden Kolbens (31) liegt und die Trägheitskräfte relativ zu diesem ersten Kolben (31) sowie die Komponente der Trägheitskraft des exzentrischen Abschnitts, die auf dieser ersten Achse (X) liegt, ausgleicht, und die auch eine Komponente aufweisen, die auf einer zweiten Achse (Y) parallel zur geometrischen Achse des zweiten hin- und hergehenden Kolbens (32) liegt und die Trägheitskräfte relativ zu diesem zweiten Kolben (32) sowie die zugeordnete Komponente der Trägheitskraft des exzentrischen Abschnitts (11) auf dieser zweiten Achse (Y) ausgleicht, dadurch gekennzeichnet, daß die Gegengewichtsmittel (13) in die rotierende Masse der Kurbelwelle (6) eingelassen sind, daß das Gehäuse des Verdichters hermetisch ausgebildet ist, und daß der zweite Zylinder (22) und der zweite hin- und hergehende Kolben (32) nur zum Ausgleich der Kräfte dienen, die auf die Baueinheit erster Zylinder (21) - erster hin- und hergehender Kolben (31) während des Kompressionsvorganges wirken.
  2. Verdichter nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Zylinder (22) in den Zylinderblock eingelassen ist.
  3. Verdichter nach Anspruch 2, dadurch gekennzeichnet, daß die Baueinheiten hin- und hergehender Kolben - Kolbenstange (22,32) so ausgebildet sind, daß sie identische Trägheitseffekte aufweisen.
EP95906857A 1993-12-27 1994-12-13 Hermetischer verdichter mit hin- und hergehenden kolben Expired - Lifetime EP0686236B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BR9305363 1993-12-27
BR9305363A BR9305363A (pt) 1993-12-27 1993-12-27 Compressor hermético alternativo
PCT/BR1994/000045 WO1995018306A1 (en) 1993-12-27 1994-12-13 A reciprocating hermetic compressor

Publications (2)

Publication Number Publication Date
EP0686236A1 EP0686236A1 (de) 1995-12-13
EP0686236B1 true EP0686236B1 (de) 1998-11-04

Family

ID=4057967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95906857A Expired - Lifetime EP0686236B1 (de) 1993-12-27 1994-12-13 Hermetischer verdichter mit hin- und hergehenden kolben

Country Status (3)

Country Link
EP (1) EP0686236B1 (de)
BR (1) BR9305363A (de)
WO (1) WO1995018306A1 (de)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB771334A (en) * 1954-12-22 1957-03-27 Friedrich Hagans Improvements in single acting piston machines

Also Published As

Publication number Publication date
WO1995018306A1 (en) 1995-07-06
EP0686236A1 (de) 1995-12-13
BR9305363A (pt) 1995-09-05

Similar Documents

Publication Publication Date Title
US4819593A (en) Pivoting balancer system
US5282397A (en) Engine balancing system having at least one pivoting counterbalance weight
JP2929143B2 (ja) 揺動ヨーク装置
KR20100014311A (ko) 선형-회전 운동 변환 메커니즘
US5146749A (en) Balancing technique for Ross-type stirling and other machines
US4108581A (en) Suspension system for motor-compressor unit
US4800852A (en) Inline counterbalance weight system for a single cylinder engine
EP0686236B1 (de) Hermetischer verdichter mit hin- und hergehenden kolben
US4565169A (en) Balancer structure for three-cylinder engines
US6382166B1 (en) Balancing system using reciprocating counterbalance weight
KR100575254B1 (ko) 밀폐형 압축기
US7117781B2 (en) Piston balancing system
KR100724842B1 (ko) 밀폐형 압축기
KR950013015B1 (ko) 스크로울 압축기
EP0245583B1 (de) Reihen-Unwucht-Ausgleichsvorrichtung für einen Einzylindermotor
US4470387A (en) Mass balancing arrangement for a reciprocating-piston engine
JPS611881A (ja) 非対象のモーターコンプレツサユニツトを垂直に支持する装着構造
JPS6258066A (ja) 圧縮機
JP2000297749A (ja) 振動式圧縮機
CN212377205U (zh) 一种新型气体压缩机
JPH1089002A (ja) 往復動ピストン機構等のクランク機構
JPH03271596A (ja) 回転型圧縮機の振動減衰装置
JPS6170180A (ja) 密閉形圧縮機
KR100202896B1 (ko) 방진밴드를 지니는 밀폐형 압축기용 케이스
JPS59226728A (ja) エンジンのクランクシヤフトプ−リ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19950803

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): IT

17Q First examination report despatched

Effective date: 19961111

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): IT

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051213