WO2006066833A1 - Compresseur fonctionnant a sec - Google Patents

Compresseur fonctionnant a sec Download PDF

Info

Publication number
WO2006066833A1
WO2006066833A1 PCT/EP2005/013607 EP2005013607W WO2006066833A1 WO 2006066833 A1 WO2006066833 A1 WO 2006066833A1 EP 2005013607 W EP2005013607 W EP 2005013607W WO 2006066833 A1 WO2006066833 A1 WO 2006066833A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
connecting rod
dry
piston
piston compressor
Prior art date
Application number
PCT/EP2005/013607
Other languages
German (de)
English (en)
Inventor
Michael Hartl
Original Assignee
Knorr-Bremse Systeme für Schienenfahrzeuge GmbH
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 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH filed Critical Knorr-Bremse Systeme für Schienenfahrzeuge GmbH
Priority to CA002591491A priority Critical patent/CA2591491A1/fr
Priority to MX2007007237A priority patent/MX2007007237A/es
Priority to JP2007545969A priority patent/JP2008524483A/ja
Publication of WO2006066833A1 publication Critical patent/WO2006066833A1/fr

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
    • 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
    • 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

Definitions

  • the present invention relates to a dry-running piston compressor with a crankcase, on which at least one pot-like cylinder is arranged with an associated inner piston which is connected by means of a connecting rod with a crankshaft rotatably mounted in the crankcase, wherein the crankshaft-side end of the connecting rod via a like Rolling bearing executed connecting rod bearing is mounted on the crankshaft.
  • the field of application of the present invention extends primarily to the commercial and rail vehicle sector.
  • reciprocating compressors for the production of compressed air used which are needed in particular for the operation of the compressed air brake system.
  • the present invention relates to dry-running, that is oil-free piston compressor, which are particularly suitable for use in commercial and rail vehicle.
  • oil lubrication has the consequence that the compressed air is oily.
  • the condensate which accumulates in the subsequent air drying, must be collected because of the oil content for environmental reasons in heated containers and drained at regular intervals for disposal. This leads to an increased maintenance and disposal costs.
  • the dry running piston compressor has a crankcase for a crankshaft rotatably mounted therein. On the outside of the crankcase a plurality of pot-like cylinders are provided, each with associated inner piston, wherein the crankshaft via a connecting rod bearing as the first bearing with one end of the connecting rod is in communication to the rotational movement of the crankshaft in a linear movement for the at the other end of the connecting rod to convert a piston pin bearing stored as a second bearing piston.
  • the dry running piston compressor works without a lubricating oil in the crankcase. Instead, the lubrication on the piston barrel is replaced by a particularly low-friction dynamic seal assembly.
  • All rotating components are also roller bearings.
  • the encapsulated rolling bearings are provided with a temperature-resistant, long-lasting grease filling. In the valve area, sliding components are largely avoided.
  • an oil lubrication in the piston compressor dispensable Consequently, for example, the risk of a deterioration of the compressed air generated by the piston compressor can be excluded.
  • the conrod bearing designed as a rolling bearing in an oil-free piston compressor was always dimensioned according to the regulations of the prior art. Such a regulation is contained in the publication "FAG Rolling Bearings, WL 41 520/3 DB Catalog Edition 1999.”
  • the classical bearing dimensioning for the present case of a connecting rod bearing is determined by determining the maximum piston force, which is multiplied by the piston area with the maximum on the piston surface For the life-time design of rolling bearings, the relationship becomes
  • C dynamic load rating
  • P bearing load
  • p lifetime exponent.
  • the bearing selection is ultimately based on the resulting from this formula load capacity by appropriate mathematical forming steps.
  • Basic load ratings of rolling bearings are standardized and are based on DIN ISO 281 and DIN ISO 76.
  • the dynamic load rating C is defined as the load of invariable size and direction in which a sufficiently large quantity of identical bearings achieves a nominal service life of 1 million revolutions.
  • crankshaft and in particular the width of the same would exclude any use in a commercial vehicle at a technically appropriate location.
  • the invention includes the technical teaching that the construction space critical conrod bearing on the part of the crankshaft has a load index Bpi eue i in a range of 2 to 6, which results from the following formula:
  • the ratio between the oscillating mass m osz of the crank mechanism consisting of piston, piston ring, piston pin bearing and the oscillating part of the connecting rod and the effective area of the piston A ⁇ o should be in the range of 10 to 20.
  • a ⁇ oiben in cm 2 and iriosz in g must be stated here.
  • a particularly minimal bearing load is created, which additionally contributes to the service life extension. Said ratio brings the benefit of the invention, especially in the field of the use of particularly heavy pistons. This would be in this case then pay attention.
  • the conical bearing to be formed in the manner of a roller bearing should preferably be designed in the form of at least one ball bearing.
  • the connecting rod bearing is designed as a double-row ball bearing, which causes a corresponding broadening of the space required for the connecting rod bearing;
  • the critical in terms of a minimal space dimension of the bearing diameter can be kept very low thereby.
  • For a double-row ball bearing has a smaller outer diameter compared to a comparable single-row ball bearing.
  • the connecting rod bearing should be equipped with a grease filling for permanent lubrication. This measure also contributes to maximizing the service life.
  • the dry-running piston compressor according to the invention can be designed as a single-cylinder or multi-cylinder compressor. Likewise, in the case of multi-cylinder compressors, multi-stage compression with at least one low-pressure stage and at least one high-pressure stage is possible.
  • Figure 1 shows an arrangement of a dry-running piston compressor in one
  • Figure 2 shows an arrangement of a dry-running piston compressor in a commercial vehicle with inventive design of the connecting rod bearing.
  • a reciprocating compressor 1 is arranged within a payload or rail vehicle between a motor 2 for driving the vehicle and a support frame 3, not shown here.
  • the motor 2 for driving the vehicle also serves to drive the reciprocating compressor. 1
  • the reciprocating compressor 1 has a crankcase 4, to which a pot-like cylinder 5 is attached via a - not visible here - screw.
  • the pot-shaped cylinder 5 is provided with a cylinder head 6, through which - in a conventional manner - the intake of air from the atmosphere and the exhaust of the compressed air generated in the cylinder 5 via a valve assembly integrated therein.
  • a valve assembly integrated therein.
  • back and forth movable piston 7 is provided for generating compressed air in the cylinder 5 .
  • the piston 7 is pivotally mounted on a connecting rod 8 and is at the opposite end via a connecting rod bearing 9 with the crankshaft 10 in connection.
  • the limiting circle K illustrates that in this conventional selection of the
  • Connecting rod bearing 9 of the space between the engine 2 of the commercial vehicle and the support frame 3 would not be enough to accommodate this dry-running piston compressor here.
  • the prevailing space conditions are given by commercial vehicle manufacturers, however, as structural boundary conditions and normally provided for the installation of comparatively small-scale oil lubricated piston compressor, which, however, cause the problems described above.
  • FIG. 2 the space conditions in a dry-running reciprocating compressor designed according to the invention are illustrated by comparison.
  • the crankcase 4 of this piston compressor 1 ' may have smaller outer dimensions, so that this fits into the limited space between the engine 2 and support frame 3 of the commercial vehicle.
  • the reason for this are the comparatively smaller connecting rod bearings 9, the diameter of which determines the construction space.
  • the bearing load P is 8860 N.

Landscapes

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

Abstract

L'invention concerne un compresseur fonctionnant à sec, qui comprend un carter de vilebrequin (4) sur lequel est monté au moins un cylindre de type pot (5) avec un piston (7) associé qui se situe dedans, ledit piston étant relié au moyen d'une bielle (8) à un vilebrequin (10) logé rotatif dans le carter de vilebrequin (4). L'extrémité de la bielle (8), côté vilebrequin, est logée sur le vilebrequin (10), par l'intermédiaire d'un coussinet de bielle (9) conçu sous forme de palier à roulement. Le coussinet de bielle (9) présente un indice de sollicitation Bbielle de l'ordre de 2 à 6, qui résulte de la formule : Bbielle = Cdyn.[N]/(Apiston[mm2].pcompresseur[N/mm2], Cdyn. désignant la charge nominale dynamique du palier, Apiston désignant la surface du piston et pcompresseur désignant la pression de travail nominale.
PCT/EP2005/013607 2004-12-17 2005-12-16 Compresseur fonctionnant a sec WO2006066833A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002591491A CA2591491A1 (fr) 2004-12-17 2005-12-16 Compresseur fonctionnant a sec
MX2007007237A MX2007007237A (es) 2004-12-17 2005-12-16 Compresor con embolo seco.
JP2007545969A JP2008524483A (ja) 2004-12-17 2005-12-16 乾式ピストン圧縮機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04029955.4 2004-12-17
EP04029955A EP1674726A1 (fr) 2004-12-17 2004-12-17 Compresseur à piston à fonctionemment à sec

Publications (1)

Publication Number Publication Date
WO2006066833A1 true WO2006066833A1 (fr) 2006-06-29

Family

ID=34927824

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/013607 WO2006066833A1 (fr) 2004-12-17 2005-12-16 Compresseur fonctionnant a sec

Country Status (6)

Country Link
EP (1) EP1674726A1 (fr)
JP (1) JP2008524483A (fr)
CN (1) CN101111678A (fr)
CA (1) CA2591491A1 (fr)
MX (1) MX2007007237A (fr)
WO (1) WO2006066833A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008153087A1 (fr) * 2007-06-15 2008-12-18 Semiconductor Energy Laboratory Co., Ltd. Dispositif d'affichage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112240275A (zh) * 2020-08-27 2021-01-19 蚌埠翔云压缩机制造有限公司 一种具有良好除湿性的天然气压缩机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152677A (en) * 1990-04-18 1992-10-06 Bauer Kompressoren Gmbh Dry-running reciprocating compressor
DE10042212A1 (de) * 2000-08-28 2002-03-14 Knorr Bremse Systeme Schwingungsarmer Kolbenkompressor für Fahrzeuge
DE10109514C1 (de) * 2001-02-28 2002-07-11 Knorr Bremse Systeme Trockenlaufender Kolbenverdichter (Kurbeltriebschmierung)
US20030180161A1 (en) * 2002-03-25 2003-09-25 I-Min Hsiao Oil-free air compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152677A (en) * 1990-04-18 1992-10-06 Bauer Kompressoren Gmbh Dry-running reciprocating compressor
DE10042212A1 (de) * 2000-08-28 2002-03-14 Knorr Bremse Systeme Schwingungsarmer Kolbenkompressor für Fahrzeuge
DE10109514C1 (de) * 2001-02-28 2002-07-11 Knorr Bremse Systeme Trockenlaufender Kolbenverdichter (Kurbeltriebschmierung)
US20030180161A1 (en) * 2002-03-25 2003-09-25 I-Min Hsiao Oil-free air compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008153087A1 (fr) * 2007-06-15 2008-12-18 Semiconductor Energy Laboratory Co., Ltd. Dispositif d'affichage

Also Published As

Publication number Publication date
CA2591491A1 (fr) 2006-06-29
MX2007007237A (es) 2007-08-14
CN101111678A (zh) 2008-01-23
JP2008524483A (ja) 2008-07-10
EP1674726A1 (fr) 2006-06-28

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