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Power density is the amount of power (time rate of energy transfer) per unit volume. In case of planetary gears the load is shared by several planets instead of single gear like in other types of gearing,
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BENEFITS OF PLANETARY GEARBOX Top Gear Transmission
High power density • Power density is the amount of power (time rate of energy transfer) per unit volume. In case of planetary gears the load is shared by several planets instead of single gear like in other types of gearing, More the planets more the sharing of load and more the power density. • As a result of which planetary gear box provide high power density in comparison to standard parallel axis gearboxes.
Compact Size • Due to high power density and coaxial shaft arrangement, the planetary gearboxes are more compact. • In case of planetary gear system, driving member and driven member are concentric and therefore driving and driven equipments could be installed in same line which will result space saving.
High Efficiency • Less power losses (upto 3% each stage) results in to high efficiency of planetary gearboxes. • The gearing arrangement of planetary gears tends to transfer maximum of input energy to desired output, due to which efficiency as high as up to 97% can be achieved for first stage of planetary gearbox.
Highly Stable • The planetary gear box is highly stable due to an even distribution of mass and increased rotational stiffness. • Torque applied radially onto the gears of a planetary gear box is transferred radially by the gear, without lateral pressure on the gear teeth.
Light Weight • High power density and compact size results into very light weight, due to which for same gear ratio or torque the planetary gearbox is more lighter as compared to other traditional (parallel shaft) kind of gearbox.
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