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Research on Powder Metallurgy GearLifting Fire Tanker Performance

Apoorva TikkuReg. No. 113027

Authors:

XIE Hai-donga

YAO Hao-weib

ZHANG Liangc

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O Abstract:

O Powder metallurgy helical gear:

low manufacturing cost excellent mechanical properties

good wear resistance

high temperature

corrosion resistance. enhance the power transmission capability.

o In this article the powder metallurgy helical gear is applied on

power take off

o Characteristic of the transmission gear are analyzed.

o The transmission efficiency experiment has been done to

prove that powder metallurgy gear transmission has high

efficiency,

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IntroductionO Fire tanker is the main weapon of fire fighting and disaster relief, rescuing

O The power take off is used to transmit output power of the engine to the fire apparatus.

O Function of the power take off affects the whole fire engine performance.

O Powder metallurgy gear has low manufacturing cost, high precision, better wear resistance, and fatigue

resistance, good resistance to high temperature and corrosion resistance than common alloy gears.

O Finite element method is used on analysis of the characteristic of the transmission gear.

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Fire tanker power take-off mode

O Power take off is a power transmission device through gear.

O According to the installation position and the role, fire vehicle power take-

off power mode is roughly divided into five categories:

Forcing from transmission cover,

Transmission countershaft of power,

Taking full power

Forcing from driving shaft

Lateral forcing.

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Principle:

the force taken directly from the

transmission shaft, and the input

shaft directly

outputting the first power source to

the vehicle transmission, at the same

time the axis through an intermediate

gear drives the output shaft to rotate

and output power to second fire

apparatus. This form of force taking Taking ful l power

device has the advantage of

lubrication convenient, full

power output , high transmission efficiency and easy realization of fire

vehicle double function, can realize the edgerunning edge water-jet, applicable to large tonnage tank fire engine

and mixed-type firefighting vehicle

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Powder metallurgy helical gear performance and finiteelement analysis

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Experimental study on transmission efficiency

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Conclusion:O Fire tanker power take-off performance depends on the gear

transmission performance.

O The possible resonance frequency mode has been calculated to

provide reference for optimization design.

O Transmission efficiency test has proved that the powder metallurgy

helical gear is a kind of high performance gear. In the same

condition, its efficiency 14% more than that of the alloy helical gear

and the maximum transmission efficiency can be over 99%.

O It has more stable transmission, longer service life, enhances the

power performance.

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Experiments on the relationship between the

dynamic transmission error and the dynamicstress factor of spur gear pairs

Authors:

O M.A. Hotait, American University of Sharjah,

O A. Kahraman, The Ohio State University,

Columbus

O Apoorva Tikku

113027

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Abstract