轴承载荷计算.pdfVIP

Technical Data 6. Bearing Load Calculation 6.1 Loads acting on shafts To compute bearing loads, the forces which act on the shaft Because the actual gear load also contains vibrations and being supported by the bearing must be determined. These shock loads as well, the theoretical load obtained by the above forces include the inherent dead weight of the rotating body formula should also be adjusted by the gear factor fz as shown (the weight of the shafts and components themselves), loads in Table 6.1. generated by the working forces of the machine, and loads Table 6.1 Gear factor f arising from transmitted power. z It is possible to calculate theoretical values for these loads; Gear type fz however, there are many instances where the load acting on Precision ground gears the bearing is usually determined by the nature of the load (Pitch and tooth profile errors of less 1.05~1.1 acting on the main power transmission shaft. than 0.02 mm) 6.1.1. Gear load Ordinary machined gears The loads operating on gears can be divided into three main (Pitch and tooth profile errors of less 1.1~1.3 types according to the direction in which the load is applied; than 0.1 mm) i.e. tangential (K ), radial (K ), and axial (K ). The magnitude t s a and direction of these loads differ according to the types of gears involved. The load calculation methods given herein are for two general-use gear and shaft arrangements: parallel shaft gears, and cross s