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
  • 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
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/06—Engines with means for equalising torque
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
  • F02B75/18—Multi-cylinder engines
  • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement

Definitions

• Torsional vibration damping unit in the driving system of a reciprocating diesel engine.
• the object of the invention is a torsional vibration damping unit in the driving system of a reciprocating diesel engine intended for limiting the amplitude of torsional vibration transferred between the engine main shaft and auxiliary mechanisms such as fuel injection pump, timing gear, oil or water pump, by means of flexible shafts.
• the objective of the invention is a limitation of torsional vibration in particular drive shafts of engine mechanisms while introducing minimum design changes to this engine.
• the basis for the adopted solution was to determine the effect of localised sources of generation and intensification of this vibration on construction elements of the engine.
• the essence of the torsional vibration damping unit in the driving system of a reciprocating diesel engine according to the present invention is, that the vibration damper of the main shaft is fitted on this shaft near the power take-off area, as well as at the same time on the injection pump coupling an additional damper is mounted, mating with the vibration damper of the main shaft.
• the solution is also featured by the fact that the multi-section gear oil pump is provided with oblique teeth gears.
• the known viscous damper is mounted on the engine main shaft, and the known friction damper mounted on the injection pump coupling.
• Such a design of the torsional vibration damping unit in the engine driving system allowed to effectively limit the destructive influence of torsional vibration on the driving transmission of injection pump and on other mechanisms.
• the torsional vibration damper of main shaft mounted on this shaft close to the area of power take-off is located so that the corresponding harmonic of torsional vibration be of the lowest value in the area of power transmission from the main shaft to auxiliary mechanisms. It permitted to eliminate the need for mounting in this area an additional torsional vibration damper.
• Interaction of torsional vibration from another source being a sum of pressure pulses, coming from particular sections ' of gear oil pump, was eliminated by the use as an element of the unit according to the invention, of the gears with oblique teeth, instead of the used before in the said pump, gears having straight teeth.
• a consecutive element of the unit according to the invention is an additional damper mounted on the injection pump coupling, said damper mating with the damper of main shaft vibration which limits torsional vibration. This co-operation is a result of participation in the amplification of this vibration - a flexible shaft connected through a gear transmission to the drive shaft of said fuel injection pump.
• Fig.1 illustrates schematic arrangement in the engine of particular elements of the torsional vibration damping unit in the driving system of a reciprocating diesel engine.
• a torsional vibration damping unit in the driving system of a reciprocating diesei engine is used on an engine, in which the drive of auxiliary mechanisms such as the fuel injection pump, timing gear, oil pump 1 or water pump is performed through flexible shafts 2.
• the mechanism of oil pump for this engine is a multi-section gear oil pump 1.
• a torsional vibration damping unit in the driving system of the engine is constructed of three, suitably arranged on the engine, structural members of this unit, accomplishing a common purpose which is damping said torsional vibration in the driving system of the engine.
• the first element of the unit according to the present invention is a torsional vibration damper 3 of the main shaft 4, that is mounted on the shaft 4 near the area of power take-off 5.
• the vibration damper 3 has been located at the same time close to the area of maximum amplitude of the determined form of this torsional vibration on the main shaft 4 of the engine.
• a torsional vibration damper 3 the known viscous damper has been employed.
• the second element of the unit according to the invention is the use in the multi-section gear oil pump 1 of gears having oblique teeth, instead of the used until now gears with straight teeth.
• the third element of the unit is an additional damper 6 which is mounted on the injection pump coupling 7 and which is co-operating with the vibration damper 3 of the main shaft 4.
• a known friction damper is used as an additional damper 6 in an advantageous embodiment of the invention.
• the first element of the unit according to the invention performs the limitation of torsional vibration amplitude of the engine main shaft 4 in the area of bifurcation 8 of engine auxiliary drives.
• the second element limits torsional vibration caused by periodical summing of pressure pulses coming from the particular sections of the gear oil pump 1.
• the third element reduces to a minimum the amplitude of torsional vibration, taken- over in the area of bifurcation 8 of engine auxiliary drives and then transferred by intermediary of flexible shaft 2 to the drive shaft 9 of injection pump transmission.
• the co-operation of the said three structural elements of the torsional vibration damping unit according to the invention reduced to a safe level the amplitudes of torsional vibration in the engine driving system, and particularly in the area of the injection pump drive and thus allowed to achieve the assumed working parameters of the engine.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Aviation & Aerospace Engineering (AREA)
• High-Pressure Fuel Injection Pump Control (AREA)
• Fuel-Injection Apparatus (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

Family

ID=20076695

Family Applications (1)

Country Status (6)

Cited By (2)

Citations (4)

• 2000
  • 2000-05-24 PL PL00340314A patent/PL340314A1/xx not_active IP Right Cessation
  • 2000-08-22 YU YU82902A patent/YU82902A/sh unknown
  • 2000-08-22 CZ CZ20024152A patent/CZ294215B6/cs not_active IP Right Cessation
  • 2000-08-22 SK SK1828-2002A patent/SK283959B6/sk unknown
  • 2000-08-22 WO PCT/PL2000/000056 patent/WO2001090545A1/en active IP Right Grant
  • 2000-08-22 AU AU2000264849A patent/AU2000264849A1/en not_active Abandoned

Patent Citations (4)

Non-Patent Citations (1)

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