1905-10 October Electrical Worker.pdf - International Brotherhood of ...
1905-10 October Electrical Worker.pdf - International Brotherhood of ...
1905-10 October Electrical Worker.pdf - International Brotherhood of ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
8 THE ELECTRlCAL WORKER<br />
parts. They thus lessen heating, waste <strong>of</strong><br />
power, and wear. To prevent direct COlltact<br />
the lubricants must be sufficiently viscous<br />
to withstand pressure on the bearings.<br />
The temperature is naturally higher at the<br />
points where oil is most needed, and with'<br />
increasing temperature the viscosity <strong>of</strong> most<br />
oils diminish very rapidly. Different oils<br />
have also widely differing internal frictional<br />
resistances, which are greatly affecJed<br />
. by the temperature and velocity <strong>of</strong> the -rubbing<br />
surfaces. Internal friction resistance<br />
increases the amount <strong>of</strong> heat generated by<br />
the friction in the bearings; hence oils' with<br />
supporting layer between the rubbing surfaces<br />
will be maintained in spite <strong>of</strong> the high<br />
pressure on the bearings; for in this case<br />
th
Change language