WO2011012625A1 - Bielle - Google Patents

Bielle Download PDF

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Publication number
WO2011012625A1
WO2011012625A1 PCT/EP2010/060900 EP2010060900W WO2011012625A1 WO 2011012625 A1 WO2011012625 A1 WO 2011012625A1 EP 2010060900 W EP2010060900 W EP 2010060900W WO 2011012625 A1 WO2011012625 A1 WO 2011012625A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting rod
eye
opening
contour
shaft
Prior art date
Application number
PCT/EP2010/060900
Other languages
German (de)
English (en)
Inventor
Alfred Schweighofer
Peter SCHÖLLAUF
Original Assignee
Acc Austria 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 Acc Austria Gmbh filed Critical Acc Austria Gmbh
Publication of WO2011012625A1 publication Critical patent/WO2011012625A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J7/00—Piston-rods

Definitions

  • the present invention relates to a connecting rod, in particular for use in refrigerant compressors, comprising a first connecting rod eye for connecting the connecting rod to a guided inside a cylinder piston, and a second connecting rod eye for connecting the connecting rod to a crank pin of a crankshaft, wherein the two connecting rod through a connecting rod shaft are connected to each other, which has at least one opening, which is arranged closer to the second connecting rod than the first connecting rod and wherein the opening to the second connecting rod substantially extends and the contour of the connecting rod substantially tangentially into the outer periphery of the second connecting rod passes over.
  • Piston / cylinder arrangements which drive a crankshaft by means of a connecting rod, are already sufficiently known from internal combustion engine and compressor technology.
  • the connecting rod of a reciprocating compressor transmits the rotating force components of the crankshaft to the linearly moving working piston for generating the compression.
  • Such a connecting rod has two each provided with a circular opening or a "connecting rod” end portions, wherein the first end portion and the first, usually smaller, connecting rod (also called connecting rod) by means of a piston pin on the piston is articulated, while the second end portion and the second, usually larger, connecting rod eye (also referred to as a connecting rod) is connected to the crankshaft or hinged to a corresponding crankpin of the crankshaft.
  • the diameter of the crankshaft side second connecting rod then corresponds substantially to the diameter of Hubzapfens, so that the crank pin is encompassed by the second connecting rod eye on all sides.
  • the two connecting rod eyes are connected by the connecting rod shaft, which is designed as an I-shaped standard (see FIG. 1).
  • the width of the connecting rod shaft is also generally smaller than the diameter of the second, larger connecting rod, it is about only one third of the outer diameter of the second connecting rod.
  • EP 1 015 777 B1 discloses a connecting rod having a circular or oval recess near the larger connecting rod eye, the ratio between the area of the recess and the area of the opening of the bearing of the larger connecting rod eye being 0.1 to 5%. Due to the shape of the recess and the connecting rod in the region of the recess, such a connecting rod only allows a slight improvement in the surface pressure at the larger connecting rod eye.
  • a connecting rod according to claim 1 by the breakthrough is surrounded along its entire contour of the connecting rod, the breakthrough has substantially the shape of an isosceles triangle and the connecting rod is made by sintering.
  • the - seen in the longitudinal direction of the connecting rod - located behind the opening area of the second connecting rod is thereby relieved. This is further enhanced by the substantially tangential transition of the connecting rod shaft to the second connecting rod eye.
  • substantially expanded expresses that for manufacturing reasons in a relatively small area of the opening, a small reduction in the width of the opening to the second connecting rod eye may also occur, for example because the corners of the opening must be rounded off Circular or oval breakthroughs do not fall under the term “substantially expanded", because they narrow again half of their length to the second connecting rod eye.
  • the breakthrough is surrounded along its entire contour of the connecting rod shank (and that not, as in DE 83 30 799 Ul, the contour is partially formed by the connecting rod), it is ensured that the connecting rod can be made by sintering.
  • the execution of the breakthrough in the form of an isosceles triangle contributes to the fact that the connecting rod can be easily shaped.
  • the base of the triangle points to the second connecting rod eye, the apex of the triangle to the first connecting rod eye.
  • the symmetry axis will - for reasons of symmetry - usually coincide with the longitudinal axis of the connecting rod.
  • the term "substantially the shape of an isosceles triangle" expresses that for manufacturing and strength reasons, the corners of the triangle must be rounded more or less so that the ideal shape of a triangle with sharp corners is lost.
  • the opening angle of the triangle ie the angle between the legs of equal length, is about 6-36 °.
  • connecting rod of the breakthrough is preferably arranged symmetrically to the longitudinal axis of the connecting rod shaft.
  • the width of a remaining connecting rod measured in the plane of the connecting rod, between the contour of the connecting rod shaft and the longitudinal contour of the aperture between 10% and 100%, in particular between 30% and 60%, of the total width of the connecting rod shaft at the point of its smallest width.
  • a geometrically simple design of the connecting rod is that the contour of the connecting rod shaft in the region of the opening and to the second connecting rod eye is straight. This leads to a weight saving, also affects the connecting rod shaft in this area then as a push rod in the direction of force. Equally geometrically simple is the execution, where the
  • Transverse contour of the breakthrough is essentially straight, as is the case with the base of an isosceles triangle.
  • the further breakthrough itself extended substantially to the first connecting rod end and / or if the further opening is surrounded along its entire contour by the connecting rod shaft and / or if the further opening is arranged symmetrically to the longitudinal axis of the connecting rod shaft and / or if the further opening substantially the shape of an isosceles triangle and / or the contour of the connecting rod shaft extends in the region of the further opening parallel to the longitudinal contour of the opening.
  • the connecting rod could also be designed as a so-called built connecting rod, so be composed of several separately manufactured components.
  • Circumference is less than at the inner circumference.
  • Connecting rod eye is characterized less stiff at the outer periphery, it is at the second connecting rod a deformation in the
  • the chamfer can have a straight contour, but also a concave, convex or any contour
  • the thickness of the second connecting rod on the outer circumference by a step normal to the plane of the connecting rod, by a subsequent bevel and a subsequent vertical step that ends at the connecting rod shaft, can be reduced.
  • the bevel is thus limited by two sections that meet at a normal angle to the sintering tool or the connecting rod shank.
  • a web extending at least around the second connecting rod eye is provided, the thickness of which is smaller than the thickness of the second connecting rod eye.
  • the web is dimensioned so that it has a width of 105-150%, in particular of 110% -140%, of the diameter of the second connecting rod eye.
  • the width of the web is to be understood here as the diameter of the connecting rod plus web.
  • a corresponding web around the first connecting rod eye is also possible.
  • the connecting rod according to the invention not only the maximum occurring surface pressure in the second (larger) connecting rod eye or its bearings can be reduced, it can also be increased, the carrying capacity of the second connecting rod.
  • the position of the stresses in and thus the elastic deformation of the second connecting rod can be changed or controlled. The breakthrough ultimately causes a material and weight savings.
  • Fig. 1 is a connecting rod according to the prior art with I-shaped
  • FIG. 2 shows the surface pressure in the second (larger) connecting rod eye from FIG. 1
  • Fig. 3 is a connecting rod with a circular breakthrough in the second
  • FIG. 4 shows the surface pressure in the second (larger) connecting rod eye from FIG. 3
  • Fig. 5 shows an inventive connecting rod with triangular
  • Breakthrough and equally wide connecting rods 6 shows the surface pressure in the second (larger) connecting rod eye from FIG. 5
  • Fig. 7 shows a connecting rod according to the invention with a small triangular
  • FIG. 10 shows the surface pressure in the second (larger) connecting rod eye from FIG. 11
  • a standard connecting rod according to the prior art with I-shaped connecting rod shaft 3 is shown without breakthrough.
  • the width of the connecting rod shaft 3 is approximately only one third of the outer diameter of the second (larger) Pleuelauges 2 or about half the diameter of the first (smaller) Pleuelauges 1.
  • the connecting rod shaft 3 widens only slightly, if in the second (larger ) Connecting rod eye 2 passes. As a result, there occur at the transition very high surface pressures, which can lead to a pushing of the web of the second connecting rod 2 and in any case stress the bearing in the second connecting rod 2 strong.
  • the surface pressure in the second (larger) connecting rod eye of Fig. 1 is shown in Fig. 2.
  • the normalized to 1 width of the second connecting rod 2 is shown (from 0% to 100%), which is measured along the projected into the plane (bearing) surface of the second connecting rod 2.
  • the force distribution along that half inner circumference of the second connecting rod 2, which faces the connecting rod shaft 3, is measured.
  • On the vertical axis is normalized to 1 height or Thickness of the second connecting rod 2 shown (from 0% to 100%), which is measured along the projected into the plane (bearing) surface of the second connecting rod 2.
  • the value "x" represents a predetermined value of the surface pressure
  • the lines marked "x" or fractions of "x” represent lines of equal surface pressure.
  • a connecting rod is shown, which has a small circular aperture 4 near the second connecting rod 2 and another opening 7 near the first connecting rod 1.
  • the opening 4 is not formed according to the invention, the tangential transition of the connecting rod 3 in the second connecting rod 2, however, already.
  • the second connecting rod 2 is enclosed by a web 10 whose thickness that of the
  • Connecting rod 3 corresponds and this about the same
  • FIG. 4 the surface pressure in the second (larger) connecting rod 2 is shown in FIG. 3, wherein the type of representation corresponds to that in Fig. 2.
  • the area of highest surface pressure in this case 6/8 x, has already become considerably smaller in terms of area than in FIG. 2.
  • the areas of decreasing surface pressure surround the area of highest surface pressure in the form of approximately concentric rectangles. The area of maximum surface pressure could therefore already be significantly reduced with the small round opening 4 and the tangential transition of the connecting rod shaft 3 into the second connecting rod eye 2.
  • Fig. 5 an inventive connecting rod with a triangular opening 4 and equal width connecting rods 11 is shown.
  • the aperture 4 has a length of 15-200% (here about 110%), the diameter of the bearing bore of the second connecting rod 2, the transverse contour 6 has a length of 20-150% (75% here) of the diameter of the bearing bore of the second Pleuelauges 2, the opening angle of the triangle is 6-50 ° (here about 30 °).
  • the corners of the opening 4 are rounded.
  • the connecting rods 11 have a width (normal distance between the contour of the connecting rod shaft 3 and the longitudinal contour 5 of the opening 4) of 10-100%, in particular between 30-60%, (here about 50%) of the total width of the connecting rod shaft 3 in the region of the lowest Width.
  • the width of the connecting rod first decreases in the direction of the second connecting rod eye 2 and reaches its smallest width after about one third of the total length of the connecting rod. Then, the connecting rod shank 3 extends linearly until it is substantially tangential to the outer periphery of the second connecting rod 2, more precisely, at the annular web 10, followed.
  • the connecting rod also has a further opening 7 at the first connecting rod eye 1, which also extends linearly towards the first connecting rod eye 1 and is completed by a semicircular contour. He has a length of 20-200% (here about 65%) of the diameter of the bearing bore of the first connecting rod 1 and at its widest point the width of 20-150% (here about 40%) of the diameter of the bearing bore of the first connecting rod 1. It is surrounded by the connecting rod shank 3 and has for the first connecting rod 1 about a distance from the thickness of the first connecting rod 1. In a deteriorated version, which can bring manufacturing advantages in very small bearing diameters, this breakthrough can also be circular.
  • FIG. 6 shows the surface pressure in the second (larger) connecting rod eye 2 from FIG.
  • FIG. 7 shows a connecting rod according to the invention with a small triangular aperture 4 and connecting rods 11 of equal width.
  • the aperture 4 here only has a length of approximately 50% of the diameter of the bearing bore of the second connecting rod 2
  • the transverse contour 6 has a length of approximately 50 % of the diameter of the bearing bore of the second connecting rod 2
  • the opening angle of the triangle is about 45 °, that is greater than that in Fig. 5.
  • the corners of the opening 4 are rounded.
  • the connecting rods 11 have a width (normal distance between the contour of the connecting rod shaft 3 and the longitudinal contour 5 of the opening 4) of 10-100%, in particular between 30-60%, (here about 50%) of the total width of the connecting rod shaft 3 in the region of the lowest Width.
  • the width of the connecting rod first decreases in the direction of the second connecting rod eye 2 and reaches its smallest width after about one third of the total length of the connecting rod and retains it to about half the length of the connecting rod. Only then does the connecting rod shank 3 expand linearly until it adjoins tangentially on the outer circumference of the second connecting rod eye 2, more precisely on its annular web 10.
  • the connecting rod also has a further opening 7 at the first connecting rod eye 1, which is formed as in FIG. 5.
  • FIG. 8 shows the surface pressure in the second (larger) connecting rod eye 2 from FIG. 7, the type of representation corresponding to that in FIG. 2.
  • the values of the surface pressure are again given in relation to the highest surface pressure x in FIG.
  • the largest occurring value of the surface pressure is also 4 / 8x, so about half of the value in Fig. 2, that is the same size as in Fig. 6.
  • the largest value of the surface pressure is 4 / 8x, ie half of the highest value x of FIG. 2.
  • the load of the second connecting rod 2 in the region of the longitudinal axis of the connecting rod could be reduced by 50%.
  • FIG. 9 shows the side view of a second (larger) connecting rod eye 2 according to the invention with chamfer 8 and steps 9. If one goes radially outwards from the inner periphery of the second connecting rod eye 2, the thickness of the connecting rod eye 2 remains constant for the time being, then decreases due to a first right-angled one vertical step 9 (at about 75% of the outer radius of the connecting rod 2) both at the top and at the bottom of the connecting rod, goes over into a 45 ° bevel 8, which in turn merges with a vertical step 9, the normal the plane of the connecting rod 3 or the web 10 hits. On the outer circumference of the Pleuelauges 2 this has thus only a thickness of about half of the inner circumference, since up and down has ever been removed about a quarter of the thickness.
  • this reduction in thickness can be achieved only by a single chamfer whose angle does not necessarily have to be 45 °, or by several rectangular steps or combinations of chamfers and steps.
  • the Rejuvenation could also be performed as a concave, convex or other curve.
  • FIG. 10 shows the surface pressure in the second (larger) connecting rod eye 2 from FIG. 9, the type of representation corresponding to that in FIG. 2.
  • Fig. 11 shows in comparison to the surface pressure in the second (larger) connecting rod 2 without chamfer 8 and stages 9, so if the thickness of the connecting rod 2 between the inner and outer periphery remains constant.
  • the illustrated lines limit areas of the same surface pressure, particularly close to each other lines indicate a high local change in the surface pressure.
  • a maximum of surface pressure at the lower end of the connecting rod 2 can be seen.
  • Typical dimensions of a connecting rod according to the invention are:
  • Distance of the connecting rod eyes from 20mm to 100mm, especially from 25mm to 50mm
  • Inner diameter of the first and second connecting rod from 7mm to 20mm, especially from 9mm to 14mm.
  • Typical thickness of the connecting rod shaft from 1.5mm to 8mm, especially from 2.5mm to 5mm
  • Typical thickness of the connecting rod eyes from 4mm to 16mm, especially from 6mm to 11mm

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

L'invention concerne une bielle, en particulier destinée à être utilisée dans les compresseurs frigorifiques, comprenant une tête de bielle (1) et un pied de bielle (2), la tête et le pied de bielle (1, 2) étant reliés par une tige de bielle (3) qui comprend au moins une traversée (4) qui est disposée plus près du pied de bielle (2) que de la tête de bielle (1). La traversée (4) s'élargit sensiblement dans la direction du pied de bielle (2) et le contour de la tige de bielle (3) effectue une transition sensiblement tangentielle avec le contour extérieur du pied de bielle (2). Afin de réduire la pression surfacique sur le pied de bielle (2), plus grand, ou encore sur son palier, au niveau de l'axe longitudinal de la tige de bielle, et pour permettre la fabrication par frittage il est prévu que la traversée (4) soit entourée sur tout son contour (5, 6) par la tige de bielle (3), que la traversée (4) ait sensiblement la forme d'un triangle isocèle et que la bielle soit fabriquée par frittage.
PCT/EP2010/060900 2009-07-28 2010-07-27 Bielle WO2011012625A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0047909U AT11501U1 (de) 2009-07-28 2009-07-28 Pleuel
ATGM479/2009 2009-07-28

Publications (1)

Publication Number Publication Date
WO2011012625A1 true WO2011012625A1 (fr) 2011-02-03

Family

ID=42676746

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/060900 WO2011012625A1 (fr) 2009-07-28 2010-07-27 Bielle

Country Status (2)

Country Link
AT (1) AT11501U1 (fr)
WO (1) WO2011012625A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103917411A (zh) * 2011-11-03 2014-07-09 罗伯特·博世有限公司 用于分组照明单元的方法和设备
CN104321512A (zh) * 2012-05-17 2015-01-28 博格华纳公司 热绝缘vtg杠杆以及连杆机构
WO2015149872A1 (fr) * 2014-04-04 2015-10-08 Howden Thomassen Compressors Bv Bielle à extrémité modifiée

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015215553A1 (de) * 2015-08-14 2017-02-16 Bayerische Motoren Werke Aktiengesellschaft Pleuel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8330799U1 (de) 1983-10-27 1985-10-17 Adam Opel AG, 6090 Rüsselsheim Pleuelstange für Brennkraftmaschinen
EP1015777A1 (fr) * 1997-09-19 2000-07-05 DANFOSS COMPRESSORS GmbH Bielle de couplage d'un compresseur frigorifique hermetique
WO2002027200A1 (fr) * 2000-09-26 2002-04-04 Miba Sintermetall Aktiengesellschaft Bielle frittee pour un moteur a combustion interne
DE202005021279U1 (de) 2005-10-20 2007-09-13 Neander Motors Ag Pleuel für eine Kolbenarbeitsmaschine
DE102007000762A1 (de) * 2006-09-29 2008-04-24 Toyota Jidosha Kabushiki Kaisha, Toyota Verbindungsstange für eine Brennkraftmaschine
JP2009148792A (ja) * 2007-12-20 2009-07-09 Toyota Motor Corp コンロッドの製造方法及びコンロッド鍛造用金型

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8330799U1 (de) 1983-10-27 1985-10-17 Adam Opel AG, 6090 Rüsselsheim Pleuelstange für Brennkraftmaschinen
EP1015777A1 (fr) * 1997-09-19 2000-07-05 DANFOSS COMPRESSORS GmbH Bielle de couplage d'un compresseur frigorifique hermetique
EP1015777B1 (fr) 1997-09-19 2004-04-21 DANFOSS COMPRESSORS GmbH Bielle de couplage d'un compresseur frigorifique hermetique
WO2002027200A1 (fr) * 2000-09-26 2002-04-04 Miba Sintermetall Aktiengesellschaft Bielle frittee pour un moteur a combustion interne
DE202005021279U1 (de) 2005-10-20 2007-09-13 Neander Motors Ag Pleuel für eine Kolbenarbeitsmaschine
DE102007000762A1 (de) * 2006-09-29 2008-04-24 Toyota Jidosha Kabushiki Kaisha, Toyota Verbindungsstange für eine Brennkraftmaschine
JP2009148792A (ja) * 2007-12-20 2009-07-09 Toyota Motor Corp コンロッドの製造方法及びコンロッド鍛造用金型

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103917411A (zh) * 2011-11-03 2014-07-09 罗伯特·博世有限公司 用于分组照明单元的方法和设备
CN104321512A (zh) * 2012-05-17 2015-01-28 博格华纳公司 热绝缘vtg杠杆以及连杆机构
KR20150013681A (ko) * 2012-05-17 2015-02-05 보르그워너 인코퍼레이티드 단열 vtg 레버 및 연결장치
US10359078B2 (en) 2012-05-17 2019-07-23 Borgwarner Inc. Heat isolating VTG lever and linkage
KR102023463B1 (ko) * 2012-05-17 2019-09-20 보르그워너 인코퍼레이티드 단열 vtg 레버 및 연결장치
WO2015149872A1 (fr) * 2014-04-04 2015-10-08 Howden Thomassen Compressors Bv Bielle à extrémité modifiée
CN106164544A (zh) * 2014-04-04 2016-11-23 豪顿托马森压缩机有限责任公司 具有改进端的连杆
KR20160142353A (ko) * 2014-04-04 2016-12-12 호우덴 토마쎈 컴프레셔스 비브이 변형된 단부를 갖는 연결 로드
JP2017512962A (ja) * 2014-04-04 2017-05-25 ホーデン トマセン コンプレッサーズ ビーブイ 改良端部を有する連接ロッド
KR101902092B1 (ko) * 2014-04-04 2018-11-02 호우덴 토마쎈 컴프레셔스 비브이 변형된 단부를 갖는 연결 로드
US10215167B2 (en) 2014-04-04 2019-02-26 Howden Thomassen Compressors Bv Connecting rod with modified end

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