The time interval of complement in the operation of the rolling bearing grease

The expected life of the grease is affected by many factors. Such as the type, rotation speed and temperature of the bearing grease, dust and corrosive gas in the working environment, the design of the sealing device and practical situation of the role play, etc. For small sealed or bearing, bearing itself and one of the two grease decide the life of a bearing. Don't need to also can't be on the way to add or replace the grease. According to the experience, the influence of temperature on the added grease interval is: when the temperature ( In the temperature of the bearing outer ring measured) Every increase more than 40 ℃, 15 ℃, supplement the grease will shorten the half time interval. For open bearing, add the time interval of the grease may refer to below. Given above is subject to a carp base containing oxidant grease under normal working conditions of a fixed horizontal axis in the mechanical bearings, the supplement of the grease interval ( The ordinate Y axis to complement intervals TF, the unit is working hours, abscissa X axis for the bearing rotating speed n, unit for r/min, d for bearing inner diameter, the unit is mm) 。 Among them a, coordinates of radial bearing. B coordinates for cylindrical roller and needle bearing; C coordinates of spherical roller bearing, tapered roller and thrust ball. If for full roller cylindrical roller bearing, the interval for the coordinate of the corresponding value 115 b; For cylindrical roller thrust bearing, needle roller thrust bearing, spherical roller thrust bearing, the interval for c corresponding coordinate value is 1/2. Now, for example, is as follows: a deep groove ball bearing, its inner diameter d = lOOmm, run speed n = lOOOr/min, the working temperature range of 60 ~ 70 ℃. Please be sure to supplement the time interval of the grease for how long. On the X axis of above n = lOOOr/min to do a straight line parallel to the Y axis, and the curve of the diameter d = lOOmm intersection of the Y coordinates (a. Suitable for radial bearing - Deep groove ball bearing) The value is about 1. 2 x 10 to the fourth power. This example complement the time interval of the grease work for 12000 hours. The experience curve chart for bearing in oil cycle ( Apply to the motor, if used with other equipment, need to be revised) , which can be used as a reference. Figure of Kf coefficient for bearing structure types, see table; N for the bearing rotating speed, the unit for the r/s; Dm for bearing average diameter, the unit is mm.