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? May. 28, 2008 - none
| Where K = Ci × k, k for the ideal state of the friction coefficient, K =
(1 ~ 5) × 10-8 [mm / (N/mm2 m
/ min hr): 1, Ci = C0 × Cl × C2 × C32, bearing the pressure P usually refers to
the so-called load bearing pressure to bear load, the maximum load bearing
support area divided by pressure, the so-called pressure area, when the
cylindrical bearings, bearings from contact with some of the load The direction
of the projection area. 3, V bearing the speed of heat, mainly due to the role
of the friction bearings caused by the light of experience available, the
friction surface temperature rise, the impact of sliding speed V P much greater
than the impact of bearing pressure. This shows that the life span of the main
bearings from the value of P × V decision. At the same time bearing PV value is
determined by the heat. When the bearings operation, bearing temperature of the
heat generated by friction and heat affected distributed, Ceramic Bearing Electrical Insulating Bearing Self Lubricating Knuckle Bearing usually to a certain
temperature stabilized, if the ongoing operation in the invasion of impurities,
the performance of lubricating oil will be reduced, and because of the impact
of friction powder, Of fatigue, then the friction surface deformation that is
changing, increase the friction coefficient, bearing the temperature rise,
causing friction surface damage, resulting in charred, based on such a case, the
bearings, the lower operating temperature, that is, the use of low value of the
PV , Bearing the load of good, life extension, in the design, as far as
possible the use of the lower value of PV. Second, the design axis: (1), under
normal circumstances axis of material selection more than 35 # quality carbon
steel structure, may also join the alloying elements heat treatment improve
their performance, the transfer of materials, surface treatment, such as
hardening, the hardness of more than bearing hardness To receive more
satisfactory results when a hard object penetrated, the hard object can be
embedded in the bearings, shaft without injury, or else the shaft will reduce
fatigue life. (2), the surface roughness larger shaft, the shaft bushings and
the processes of the oil film will be cut off, resulting in direct contact with
the two. Therefore, improving the shaft surface roughness, as far as possible,
narrow the gap Film, to close lubricating fluid state, this can improve the
life of bushings, under normal circumstances axis of surface roughness in Ral.
6 above. (3), do not bear the load of alternating shaft plating, not only can
improve its corrosion resistance, and can effectively prevent the rough wear
and improve lubrication performance.
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