EP0836004A2 - Verdichter - Google Patents

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Publication number
EP0836004A2
EP0836004A2 EP97830512A EP97830512A EP0836004A2 EP 0836004 A2 EP0836004 A2 EP 0836004A2 EP 97830512 A EP97830512 A EP 97830512A EP 97830512 A EP97830512 A EP 97830512A EP 0836004 A2 EP0836004 A2 EP 0836004A2
Authority
EP
European Patent Office
Prior art keywords
pressers
connecting rod
compressor according
shafts
double
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.)
Granted
Application number
EP97830512A
Other languages
English (en)
French (fr)
Other versions
EP0836004B1 (de
EP0836004A3 (de
Inventor
Franco Zanarini
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.)
SAFE Srl
Original Assignee
SAFE Srl
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 SAFE Srl filed Critical SAFE Srl
Publication of EP0836004A2 publication Critical patent/EP0836004A2/de
Publication of EP0836004A3 publication Critical patent/EP0836004A3/de
Application granted granted Critical
Publication of EP0836004B1 publication Critical patent/EP0836004B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/02—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders arranged oppositely relative to main shaft
    • 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
    • F04B25/00—Multi-stage pumps
    • F04B25/005—Multi-stage pumps with two cylinders
    • 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

Definitions

  • the present invention is part of the technical sector which includes compressors, that is to say, machines designed to supply energy to a compressible fluid so as to provide a user machine with the same fluid at a greater pressure than that at which it was received.
  • the present invention relates to a reciprocating positive displacement compressor.
  • Double-action cylinders have a widespread application in the reciprocating compressor sector.
  • both faces of the piston are active and the connecting rod which connects the compressor shaft to the piston is alternately moved by traction and compression, with different portions of the relative bearings in the two big ends which alternate in supporting the loads transmitted to the connecting rod.
  • the solution currently used to transmit reciprocating motion to the piston of a double-action cylinder envisages the use of a rod, one end of said rod being engaged with the piston and the other end being fixed to a crosshead, which is in turn connected in such a way that it may rotate to the connecting rod.
  • the present invention has for an object to provide a reciprocating positive displacement compressor with the crank system positioned halfway between the two compressing surfaces, set opposite one another, of the double-action piston.
  • concentric valves may be used for each action.
  • the two compressing surfaces of a piston slide within separate cylinders, they may have different transverse dimensions, making the compressor design more flexible.
  • each crank system ends with the above-mentioned compressing surfaces.
  • the said surfaces are obtained on two elements which, from a functional viewpoint, together form the double-action piston.
  • each of the said parts is referred to as a presser.
  • the two pressers are engaged in an offset configuration, on the opposite side to the compressing surfaces, on two coaxial shafts, which are in turn connected to one another, in the example illustrated relative to a possible embodiment, by a ring-shaped element on which the small end of the connecting rod pivots.
  • the ring-shaped element and the shafts form the required prismatic connection between the piston and the base.
  • the piston activating device (crank system) is located halfway between the active faces of the piston (pressers), and the use of concentric valves allows a reduction of the clearance volume in the head, as well as simplification of the head shape, with the consequent advantages during construction of the compressor.
  • the compressor labelled as a whole by the numeral 1
  • the compressor has four cylinders 2, 3, 4, 5 positioned in such a way that they form coaxial pairs and connected to one another (in serial and/or parallel fashion) so as to define a single/multi-stage compressor, according to the design specifications.
  • the compressor 1 has a base 90 with suitable fixing means 9.
  • crankshaft 8 which a rotating connecting rod 6 is attached at the big end 61.
  • the crankshaft 8 is connected to a motor by means of transmission parts 80, in a way substantially similar to that known to prior art.
  • the cylinders 2 and 3 have concentric valves 20, 30, directly opposite the pressers 22 and 32 of the piston X.
  • the pressers 22 and 32 which slide inside the cylinders 2 and 3, are integral with respective shafts 23 and 33, which are in turn rigidly fixed to a ring-shaped element 7.
  • the set of parts 22, 32, 23, 33 and 7 forms one double-action piston X.
  • the portions of the piston X which come into contact with the base are the shafts 23 and 33 which slide within respective bushings 25 and 35 that are integral with the base 90.
  • the present invention envisages that there are two surfaces integral with the base which are designed to axially guide the piston X, these being set at a relative distance from one another, so that halfway between them there is a pin 75 which connects the connecting rod 6 to the ring-shaped element 7.
  • a prismatic element Z with U-shaped cross-section is envisaged relative to piston Y of cylinders 4 and 5 (but also present for the piston of cylinders 2 and 3) both sides of which make contact with the ring-shaped element of piston Y, and although allowing the latter to slide, preventing it from rotating about its own axis, thus guaranteeing a correct contact in the connecting rod - piston and connecting rod - shaft rotary couplings.
  • the ring-shaped element 7 has a gap 70 with width L7 not less than twice the value of the radius of the crank of the crankshaft 8, thus allowing the connecting rod 6 to oscillate freely within the ring-shaped element 7.
  • the shape of the gap 70 in the ring-shaped element 7 is substantially that of an isosceles triangle, with height not less than the total length of the connecting rod 6.
  • the ends 24 and 34 of the shafts 23 and 33 are fixed to the opposite surfaces 72 and 73 of the ring-shaped element 7.
  • the second end or small end 60 of the connecting rod 6 is linked in such a way that it may rotate, to the connecting ring-shaped element 7, close to one of the portions at which one of the shafts is attached (near portion 72 in figure 3).
  • the connecting rod may be fixed to the ring-shaped element 7 as illustrated in the accompanying drawings: two plates 74 may be envisaged, designed to clamp the ring-shaped element 7 and simultaneously support the end of the pin 75, to which the big end 60 of the connecting rod 6 is linked in such a way that it may rotate.
  • the connecting rod 6 transmits a reciprocating straight motion to the piston X. Relative to a reference system integral with the said piston, the connecting rod 6 oscillates inside the gap 70.
  • the second piston Y more easily seen in figure 1, whose axis is at a right angle to that of piston X, slides inside cylinders 4 and 5, which have concentric valves 40 and 50, fixed to the respective cylinder heads 41 and 51.
  • the pressers 42 and 52 are integral with the shafts 43 and 53, guided by the bushings 45 and 55.
  • the present invention envisages that the crank system which transmits reciprocating straight motion to the double-action piston(s) of a compressor is physically positioned halfway between the means which link the piston(s) to the base.
  • the crankshaft - connecting rod unit is confined to a space positioned halfway between the two guide bushings of a piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Transmission Devices (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP97830512A 1996-10-11 1997-10-10 Verdichter Expired - Lifetime EP0836004B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96BO000511A IT1299095B1 (it) 1996-10-11 1996-10-11 Compressore volumetrico alternativo con guida assiale
ITBO960511 1996-10-11

Publications (3)

Publication Number Publication Date
EP0836004A2 true EP0836004A2 (de) 1998-04-15
EP0836004A3 EP0836004A3 (de) 1999-02-10
EP0836004B1 EP0836004B1 (de) 2003-05-14

Family

ID=11341644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830512A Expired - Lifetime EP0836004B1 (de) 1996-10-11 1997-10-10 Verdichter

Country Status (4)

Country Link
EP (1) EP0836004B1 (de)
AT (1) ATE240458T1 (de)
DE (1) DE69721928D1 (de)
IT (1) IT1299095B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1225332A1 (de) * 2001-01-17 2002-07-24 Fritz Haug AG Kompressor
CN103452798A (zh) * 2013-09-18 2013-12-18 安徽华晶机械股份有限公司 立式星型高压空压机的传动装置
WO2015172144A1 (en) * 2014-05-09 2015-11-12 Westinghouse Air Brake Technologies Corporation Radially configured oil-free compressor
US20220136493A1 (en) * 2007-08-09 2022-05-05 Optimum Power Technology, L.P. Apparatuses, Systems, and Methods for Improved Performance of a Pressurized System

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU186205U1 (ru) * 2018-04-24 2019-01-11 Совместное предприятие в форме общества с ограниченной ответственностью СП ООО "Орелкомпрессормаш" Поршневой компрессор

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729291A (en) * 1986-07-18 1988-03-08 Ingersoll-Rand Company Gas compressor
US4756674A (en) * 1987-08-24 1988-07-12 Ingersoll-Rand Company Reciprocating gas compressor having a split housing and crosshead guide means
CH678881A5 (de) * 1989-03-23 1991-11-15 Sulzer Ag

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1225332A1 (de) * 2001-01-17 2002-07-24 Fritz Haug AG Kompressor
US20220136493A1 (en) * 2007-08-09 2022-05-05 Optimum Power Technology, L.P. Apparatuses, Systems, and Methods for Improved Performance of a Pressurized System
US11692533B2 (en) * 2007-08-09 2023-07-04 Optimum Power Technology, L.P. Apparatuses, systems, and methods for improved performance of a pressurized system
CN103452798A (zh) * 2013-09-18 2013-12-18 安徽华晶机械股份有限公司 立式星型高压空压机的传动装置
WO2015172144A1 (en) * 2014-05-09 2015-11-12 Westinghouse Air Brake Technologies Corporation Radially configured oil-free compressor
US10001160B2 (en) 2014-05-09 2018-06-19 Westinghouse Air Brake Technologies Corporation Connecting rod for an air compressor
US10077800B2 (en) 2014-05-09 2018-09-18 Westinghouse Air Brake Technologies Corporation Radially configured oil-free compressor
AU2015255672B2 (en) * 2014-05-09 2019-03-07 Westinghouse Air Brake Technologies Corporation Radially configured oil-free compressor

Also Published As

Publication number Publication date
ITBO960511A0 (it) 1996-10-11
DE69721928D1 (de) 2003-06-18
ATE240458T1 (de) 2003-05-15
ITBO960511A1 (it) 1998-04-11
IT1299095B1 (it) 2000-02-07
EP0836004B1 (de) 2003-05-14
EP0836004A3 (de) 1999-02-10

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