GB2263328A - A balanced oscillating mechanism - Google Patents

A balanced oscillating mechanism Download PDF

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Publication number
GB2263328A
GB2263328A GB9126614A GB9126614A GB2263328A GB 2263328 A GB2263328 A GB 2263328A GB 9126614 A GB9126614 A GB 9126614A GB 9126614 A GB9126614 A GB 9126614A GB 2263328 A GB2263328 A GB 2263328A
Authority
GB
United Kingdom
Prior art keywords
connecting rod
oscillating mechanism
gudgeon pin
pin
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.)
Withdrawn
Application number
GB9126614A
Other versions
GB9126614D0 (en
Inventor
Michael Victor Rodrigues
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9126614A priority Critical patent/GB2263328A/en
Publication of GB9126614D0 publication Critical patent/GB9126614D0/en
Priority to AU30931/92A priority patent/AU3093192A/en
Priority to PCT/GB1992/002315 priority patent/WO1993012326A1/en
Publication of GB2263328A publication Critical patent/GB2263328A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/003—Systems for the equilibration of forces acting on the elements of the machine
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/22—Compensation of inertia forces
    • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/807—Balance weight, counterweight

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

A balanced Oscillating Mechanism comprising a crankshaft (1), crank pin (2), connecting rod (3), gudgeon pin (4), oscillator (5), wherein the connecting rod (3) embodies at least one balance weight (6) to counterbalance the connecting rod (3), about the axis (2a) of the crank pin (2), and wherein the crankshaft (1) embodies at least one balance weight (7) to counterbalance the combined weight of the connecting rod (2), the connecting rod balance weight (6), and the crank pin (2) about the axis (1a) of the crankshaft (1). The counterbalancing of the combined weight includes the mass of the gudgeon pin (4) and additionally the mass of gudgeon pin bearing (8). The connecting rod (3) and the gudgeon pin (4) are integral and the gudgeon pin bearing (8) is embodied within the oscillator (5). A plurality of balanced oscillating mechanisms is provided for multiple crankshaft operation as, for example, in a multipower unit ganged oscillating piston engine.

Description

A BALANCED OSCILLATING MECHANISM This invention relates to an improved balanced Oscillating mechanism (for use in engines, pumps, compressors, motors and other machines).
The importance of good balance in such machines cannot be over emphasized. Out of balance results in vibration being transmitted to the vehicle or installation and could lead to many problems such as premature break-down, due to nuts and bolts working themselves loose, fatigue failure of the machine components, as well as discomfort"injury to the user.
DISCOMFORT AT SEA Discomfort due to unbalanced engine vibration is particularly noticeable on large ocean going Motor Vessels using reciprocating diesel engines. The vibratory throb produced by the unbalanced reciprocating components is often a greater discomfort than the pitching and rolling of the ship at sea.
DISCOMFORT WITH HAND HELD TOOLS In engine driven hand held power tools, such as chain saws and strimmers, this discomfort is not only noticeable but serious: it can leave the user with jangled nerves in the hands, wrists and arms, and in extreme cases, have been known to cause permanent damage to long-term users of such equipment.
PRIOR ART Oscillating mechanisms have existed for years and in one case (PCT W091/15663, claims 27 to 29) full balance achieved at all speeds. However, the embodiments (in claim 28) is for "a balance weight to counter balance the connecting rod about the axis of the gudgeon pin" and also (in claim 29) "a balance weight to counter balance the combined masses of the said gudgeon pin, said connecting rod, said connecting rod bearings and said connecting rod balance weight about the axis of oscillation of the said oscillator flange".
The disadvantages of these embodiments is an increase in the weight (and Mass Moment of Inertia) of the oscillator, resulting in increased loads and stresses on the connecting rod, the bearings, gudgeon pin, crank pin and attendant parts, which limits the maximum speed and increases oscillatory motion transmitted to the stator.
The object of the present invention is to minimise the weight (and Mass Moment of Inertia) of the Oscillator by embodying the counter balance weight of the connecting rod about the axis of the crankpin (instead of the axis of the gudgeon pin) and by embodying the counter balance weight (of the connecting rod, gudgeon pin and connecting rod balance weight) about the axis of the crankshaft (instead of the axis of the Oscillator).
The advantages of the present invention are: 1. Reduced weight (and Mass Moment of Inertia) of Oscillator.
2. Lower stresses in gudgeon pin, connecting rod, bearings and attendant parts.
3. Higher engine speed limits with reduced failure rate.
4. Reduced Oscillating Motion transmitted to Stator.
5. Reduced Flywheel weight and Mass Moment of Inertia.
6. Simpler, Cheaper and more Robust Design.
DESCRIPTION A specific embodiment of the Invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 is a sectional view of a general arrangement showing the main embodiments of the oscillating mechanism, with the flywheel and flywheel housing on the left hand side.
Figure 2 is an end view of an oscillating mechanism viewed from the flywheel side.
Figure 3 shows three views of the crank pin balanced connecting rod with integral gudgeon pin.
Referring to the drawings, there is provided a balanced Oscillating mechanism comprising a crankshaft, 1, crank pin, 2, connecting rod, 3, gudgeon pin, 4, and oscillator, 5, wherein the connecting rod, 3, embodies at least one balance weight, 6, to counter balance the connecting rod, 3, about the axis, 2a, of the crank pin, 2, and wherein the crankshaft, 1, embodies at least one balance weight, 7, to counter balance the combined weight of the connecting rod, 2, the connecting rod balance weight, 6, and the crank pin, 2, about the axis, la, of the crankshaft, 1.
Preferably the said counter balancing of the connecting rod, 3, and the counter balancing of the said combined weight also includes the mass of the gudgeon pin, 4, and additionally the mass of gudgeon pin bearing, 8.
Preferably the said connecting rod, 3, and said gudgeon pin. 4, are integral and preferably the said gudgeon pin bearing, 8, is embodied within the said oscillator, 5.
A plurality of said balanced mechanisms is provided for multiple crankshaft operation as for example in a multi-power unit ganged oscillating piston engine.

Claims (6)

CLAIMS:
1. A Balanced Oscillating Mechanism for use in engines, pumps, compressors, motors and other machines, comprising a crankshaft, connecting rod, gudgeon pin and oscillator, wherein said connecting rod embodies at least one balance weight to counter balance the connecting rod about the axis of crank pin, and wherein the crank shaft embodies at least one balance weight to counter balance the combined weight of the said connecting rod, said connecting rod balance weight and the said crank pin about the axis of the said crankshaft.
2. A Balanced Oscillating Mechanism as in claim 1, wherein said counter balancing of said connecting rod and said counter balancing of said combined weight also includes the mass of the said gudgeon pin.
3. A Balanced Oscillating Mechanism as in claim 2, whrein the said connecting rod and said gudgeon pin are integral and wherein the said gudgeon pin bearing is embodied within the said oscillator.
4. A Balanced Oscillating Mechanism as in claims 1, 2, or 3 provided for multiple crank shaft operation.
5. A Balanced Oscillating Mechanism as in claim 4, comprising a plurality of balanced oscillating mechanisms as in a multi-power unit ganged oscillating piston engine.
6. A Balanced Oscillating Mechanism substantially as described herein with reference to and as illustrated in the accompanying drawings.
GB9126614A 1991-12-14 1991-12-14 A balanced oscillating mechanism Withdrawn GB2263328A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9126614A GB2263328A (en) 1991-12-14 1991-12-14 A balanced oscillating mechanism
AU30931/92A AU3093192A (en) 1991-12-14 1992-12-14 A balanced oscillating mechanism
PCT/GB1992/002315 WO1993012326A1 (en) 1991-12-14 1992-12-14 A balanced oscillating mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9126614A GB2263328A (en) 1991-12-14 1991-12-14 A balanced oscillating mechanism

Publications (2)

Publication Number Publication Date
GB9126614D0 GB9126614D0 (en) 1992-02-12
GB2263328A true GB2263328A (en) 1993-07-21

Family

ID=10706304

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9126614A Withdrawn GB2263328A (en) 1991-12-14 1991-12-14 A balanced oscillating mechanism

Country Status (3)

Country Link
AU (1) AU3093192A (en)
GB (1) GB2263328A (en)
WO (1) WO1993012326A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5458557A (en) * 1992-10-26 1995-10-17 Heidelberger Druckmaschinen Ag Quarter fold folding device having a balancing system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899933A (en) * 1974-01-02 1975-08-19 White Westinghouse Corp Transmission with antibacklash means
GB2191822A (en) * 1986-06-17 1987-12-23 Ford Motor Co Dynamic balancing of piston and connecting rod assemblies
WO1991015633A1 (en) * 1990-04-06 1991-10-17 Norbert Kille Barrier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242706B (en) * 1990-04-07 1994-02-16 Michael Victor Rodrigues Oscillating piston engine or machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899933A (en) * 1974-01-02 1975-08-19 White Westinghouse Corp Transmission with antibacklash means
GB2191822A (en) * 1986-06-17 1987-12-23 Ford Motor Co Dynamic balancing of piston and connecting rod assemblies
WO1991015633A1 (en) * 1990-04-06 1991-10-17 Norbert Kille Barrier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5458557A (en) * 1992-10-26 1995-10-17 Heidelberger Druckmaschinen Ag Quarter fold folding device having a balancing system

Also Published As

Publication number Publication date
WO1993012326A1 (en) 1993-06-24
GB9126614D0 (en) 1992-02-12
AU3093192A (en) 1993-07-19

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)