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Technical Data |
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Efficiency is an important parameter of reducer ,and lies on the design and friction of the worm and worm wheels drive units.
The mesh data table on page 9 shows dynamic efficiency (n1=1400) and static efficiency values.
Remember that these values are only achieved after the unit has been run in.
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DYNAMIC IRREVERSIBILITY |
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Dynamic irreversibility is achieved when the output shaft stops instantly when drive is no longer transmitted
through the worm shaft. This condition requires a dynamic efficiency of ηd < 0.4 |
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STATIC IRREVERSIBILITY |
Static irreversibility is achieved when with the gear reducer at a standstill, the application of load to the output shaft can’t drive the worm shaft. This condition requires a static efficiency of ηs < 0.5 |
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ηd |
DYNAMIC IRREVERSIBILITY |
>0.6 |
dynamic reversibility |
0.5-0.6 |
low dynamic reversibility |
0.4-0.5 |
good dynamic irreversibility |
<0.4 |
dynamic irreversibility |
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ηs |
STATIC IRREVERSIBILITY |
>0.55 |
static reversibility |
0.5-0.55 |
low static reversibility |
<0.5 |
static irreversibility |
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The table shows approximate irreversibility classes. Vibrations and shocks can affect a gear reducer’s irreversibility.
For the irreversibility conditions of a combined geared units, we must consider that the efficiency of the group is given by the product of the efficiencies of each reducer,
I.e ηd = ηd1xηd2. |