EP0569790A1 - Circuit de lubrification pour moteurs à vilebrequin - Google Patents

Circuit de lubrification pour moteurs à vilebrequin Download PDF

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Publication number
EP0569790A1
EP0569790A1 EP93106979A EP93106979A EP0569790A1 EP 0569790 A1 EP0569790 A1 EP 0569790A1 EP 93106979 A EP93106979 A EP 93106979A EP 93106979 A EP93106979 A EP 93106979A EP 0569790 A1 EP0569790 A1 EP 0569790A1
Authority
EP
European Patent Office
Prior art keywords
lubrication
crosshead
connecting rod
crankcase
journal
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
EP93106979A
Other languages
German (de)
English (en)
Other versions
EP0569790B1 (fr
Inventor
Pavel Dipl.Ing. Hrncir
Petr Dipl.Ing. Koukal
Viktor Dipl.Ing. Langer
Miloslav Nepala
Karel Dipl.Ing. Skop
Petr Dipl.Ing. Tomecka
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.)
KUNZ HRANICE AS
Original Assignee
KUNZ HRANICE AS
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 KUNZ HRANICE AS filed Critical KUNZ HRANICE AS
Publication of EP0569790A1 publication Critical patent/EP0569790A1/fr
Application granted granted Critical
Publication of EP0569790B1 publication Critical patent/EP0569790B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity

Definitions

  • the invention relates to a lubrication circuit of machines with a crank mechanism, in particular plunger and piston pumps for the high-pressure delivery of working media, of the type specified in the preamble of claim 1.
  • a lubrication system is known from CS-A-212 094, in which the pressure lubricant is supplied via a separate branch of the lubrication circuit to the outer circumference of the cross head provided with grooves for the piston rings on its edges.
  • the crosshead has a longitudinal groove on its outer circumference, which is connected to the transverse opening for the crosshead pin.
  • the disadvantages of the known lubrication circuit systems include the difficult machining of the lubrication openings in the crankshaft and the need for an additional distribution of the lubricant to the crossheads.
  • Another problem is the cyclically interrupted supply of the lubricant into the joint of the cross-head journal bearing due to the arrangement of the lubrication paths between the rotating crankshaft and the bore in the connecting rod for the supply of the lubricant. Since the most stressed assembly of the cross-head journal bearing at the end of the lubrication paths lies in the area of the greatest pressure losses, the risk of malfunctions of the crank mechanism increases.
  • the object of the invention is to provide a lubrication system for machines with a crank mechanism, which eliminates the disadvantages mentioned above.
  • the lubrication circuit according to the invention is for machines with a crank mechanism, in particular of plunger and piston pumps, in which at least one cross head provided with a cross head pin and a connecting rod is slidably mounted in the crosshead guide in the crankcase.
  • the connecting rod is connected to the crankshaft in the crankcase in main bearings via a connecting rod bearing.
  • the essence of the invention is that a single continuous lubrication channel is formed in the crankcase at the central position of the crosshead pin perpendicular to the longitudinal axis of the crosshead guide, with supply line lubrication channels for the main bearings in the crosshead guide of the crankcase, in the connecting rod connecting rod lubrication channels and in Cross head journals are provided.
  • the central lubrication channel is provided with a flow regulator of the lubricant.
  • the lubrication circuit according to the invention enables reliable pressure lubrication of the crossheads with the lubricant, which is then conveyed under pressure to the next lubrication points and spaces via simplified, shortened and generously dimensioned lubrication paths.
  • the construction according to the invention enables the bearing gap of the cross-head journal to be constantly filled with lubricant without interruptions and pressure pulsations during the rotation of the crankshaft.
  • the supply of the lubricant to all pressure lubrication points is carried out by a single central lubrication channel, the crankshaft being not interrupted by any lubrication holes, which considerably simplifies their manufacture and processing.
  • a plurality of crosshead guides 101 are formed in a crankcase 1 provided with a trough 2, in which a plurality of crossheads 3 of the crank mechanism are slidably guided and on the end parts of which a crankshaft 4 is rotatably mounted in main bearings 41.
  • Each crosshead 3, which is fixedly connected to a piston rod, has two lateral projections which delimit a central cutout for receiving a connecting rod head 52.
  • a high bearing journal 31 is fixed in aligned transverse bores of the two approaches, on the central part of which the connecting rod head 52 is mounted via a slide bearing 32.
  • Each connecting rod is rotatably supported in a bearing 51 on the crankshaft 4.
  • a continuous central lubrication channel 6 is formed in the crankcase 1 perpendicular to the longitudinal axis of the crosshead guides 101, which passes through the intermediate walls of the crosshead guides 101 and to a lubricant source 7 arranged outside the crankcase 1, z. B. is connected via a pressure pump 7 and a filter 8.
  • a controller 9 for controlling the lubricating oil flow, for. B. with an overflow valve provided.
  • supply line lubrication channels 61 to the main bearings 41 of the crankshaft 4 are formed in the crosshead guides 101, lubrication channels 62 to the connecting rod bearings 51 in the connecting rods 5 and 31 lubrication channels 63 to the connecting rod bearings 32 in the crosshead pins 31.
  • the inlets and outlets of the sections of the central lubrication channel 6 in the crosshead guides 101 are, for. B. expanded by semi-closed semicircular grooves 102, which are shown in Fig. 2.
  • pressure oil is passed from the source 7 via the filter 8 into the central lubrication channel 6 and from here via the corresponding vertical lubrication channels 61, 62, 63 to the individual lubrication points of the crank mechanism.
  • the flow controller 9 is set so that a constant and uninterrupted supply of lubricant to both the exposed coupling points of the connecting rod 5 with the crosshead 3 as well as to the main bearing 41 of the crankshaft 4 and the connecting rod bearing 51 is ensured.
  • the recorded execution is not the only possible solution according to the invention.
  • the formation of a semi-closed semicircular groove 103 is unnecessary in each layer phase of the crosshead 3.
  • the central lubrication channel 6 can also have an elongated cross section in order to ensure sufficient overlaps even with longer stroke lengths of the pistons.
  • a plurality of axial bores can also be formed in the bearing journal 31, which communicate with the lubrication channels 62 and 63.
  • the bearing journals 31 can also expediently - as shown - be slightly shorter than the transverse bores in the cross heads 3 of the pistons, which results in end-side inlet and outlet chambers for the lubricating oil in and out of the cavities 311.
  • the regulator 9 with its overflow valve can be replaced by another type of fitting or by an exchangeable or adjustable throttle.
  • the lubrication circuit according to the invention can be used in all crank drives in which a constant and uninterrupted supply of the pressure lubricant to all lubrication points must be ensured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
EP19930106979 1992-05-13 1993-04-29 Circuit de lubrification pour moteurs à vilebrequin Expired - Lifetime EP0569790B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ142792 1992-05-13
CS921427A CZ142792A3 (en) 1992-05-13 1992-05-13 lubrication circuit of machines with crank mechanism

Publications (2)

Publication Number Publication Date
EP0569790A1 true EP0569790A1 (fr) 1993-11-18
EP0569790B1 EP0569790B1 (fr) 1996-09-18

Family

ID=5348624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930106979 Expired - Lifetime EP0569790B1 (fr) 1992-05-13 1993-04-29 Circuit de lubrification pour moteurs à vilebrequin

Country Status (4)

Country Link
EP (1) EP0569790B1 (fr)
CZ (1) CZ142792A3 (fr)
DE (1) DE59303814D1 (fr)
SK (1) SK278221B6 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109386341A (zh) * 2017-08-02 2019-02-26 曼卡车和巴士股份公司 用于润滑内燃机的装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB503007A (en) * 1937-10-18 1939-03-29 Sulzer Ag Improvements in or relating to reciprocating engines having a crosshead between a piston rod and a connecting rod
GB2006390A (en) * 1977-10-25 1979-05-02 Balcke Duerr Ag Lubricating Crank Drives
GB2146700A (en) * 1983-09-20 1985-04-24 Porsche Ag I.C. engine cylinder head lubricant bores
GB2156450A (en) * 1984-03-27 1985-10-09 Honda Motor Co Ltd Lubrication system in internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB503007A (en) * 1937-10-18 1939-03-29 Sulzer Ag Improvements in or relating to reciprocating engines having a crosshead between a piston rod and a connecting rod
GB2006390A (en) * 1977-10-25 1979-05-02 Balcke Duerr Ag Lubricating Crank Drives
GB2146700A (en) * 1983-09-20 1985-04-24 Porsche Ag I.C. engine cylinder head lubricant bores
GB2156450A (en) * 1984-03-27 1985-10-09 Honda Motor Co Ltd Lubrication system in internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109386341A (zh) * 2017-08-02 2019-02-26 曼卡车和巴士股份公司 用于润滑内燃机的装置
CN109386341B (zh) * 2017-08-02 2022-03-08 曼卡车和巴士股份公司 用于润滑内燃机的装置
US11572812B2 (en) 2017-08-02 2023-02-07 Man Truck & Bus Ag Device for lubricating an internal combustion engine

Also Published As

Publication number Publication date
SK278221B6 (en) 1996-04-03
EP0569790B1 (fr) 1996-09-18
CZ278114B6 (en) 1993-08-11
DE59303814D1 (de) 1996-10-24
CZ142792A3 (en) 1993-08-11

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