The installation accuracy of WSBC Bearing is directly correlated with performance and life. Before installation, ensure that the shaft hole fit tolerance is maintained within H7/k6 (transition fit). For WSBC cylindrical roller bearing N310 with a bore size of 100 mm, the recommended interference is 0.03-0.05 mm. If interference error is over ± 0.01mm, the deviation of axial clearance is ±20%, and effective vibration velocity increases by 3 times. For example, when installing high-speed rail gear box, CRRC Group measured journal roundness (error ≤ 0.8μm) by laser interferometer, thus extending L10 life of WSBC bearings from 800,000 km to 1.2 million km, and saving 35% in maintenance.
Heating installation is the most critical to avoid mechanical damage. When induction heating is used, the WSBC Bearing needs to be heated evenly to 80-110 ° C (strictly prohibited to exceed 120 ° C), and the temperature gradient should be controlled within 5 ° C /min. The actual measurement of the wind power company shows that the heating temperature deviation of 15℃ will make the expansion difference of the ring be 0.02 mm, the radial runout after installing the bearing increase to 0.05 mm from 0.01 mm, and the friction torque be 40% greater. The SKF TIH series heater heats WSBC alters roller bearing 22224CA/W33 to a temperature of 95 ° C ±3 ° C, reducing the risk of damage during installation by 90%.
The axial preload needs to be calculated with accuracy. For pairs of WSBC angular contact ball bearing 7208BECBP, the preload must be established at 200-300 N, while the overload to 500 N will raise the temperature rise rate by 2.5 times and reduce the life by 60 %. During spindle installation of the CNC machine tool, the hydraulic nut is gradually pressurized (5 MPa→10 MPa→15 MPa) so that the axial backlash is stably controlled at 5-8 μm, and the radial vibration value of the spindle is reduced to 1.2 μm (1/3 of the ISO 1940-1 standard). The machining accuracy increased by 18%.
Lubrication and sealing treatment cannot be ignored. At the installation of WSBC Bearing, the bearing chamber has to be filled with grease (e.g., Mobil Polyrex EM) 30% of the volume of the bearing chamber, and overfilling to more than 50% will raise the operating temperature by 20-30℃. In Tangshan Port ore conveyor case, the bearing without WSBC special dust cover (IP65 protection level), with 150 mg/m³ environment dust concentration, channel wear (0.1 mm depth) was discovered after being operated for only 3 months, and normal installation of bearing life of 24 months.
Intelligent tools improve installation efficiency. The use of WSBC patent alignment gauge (accuracy 0.01mm /m) will reduce the shafting deviation to below 0.03mm /m. The actual measurement of an auto maker shows that when after deviation correction from 0.1mm /m to 0.02mm /m, the noise level of the drive motor bearing is reduced by 7dB (A). Annual failure rate decreased by 73%. In Baosteel hot continuous rolling production line, torque control technique is applied to install WSBC four-row tapered roller bearings (model FC4054320), which are increased by three times to 1,200 N·m, thus raising the uniformity of raceway contact stress by 45%, and reducing the fluctuation range of rolling force to ±1.5%.
Dynamic clearance adjustment determines operating stability. For WSBC thrust ball bearing 51134, the original clearance should be adjusted as 0.08-0.12mm, and thermal expansion compensation after operation should be calculated by the formula Δ=α·D·ΔT (α=11×10⁻⁶/℃, D=170 mm, ΔT=50℃), and 0.09mm expansion allowance should be reserved. In the course of installation of a unit of a hydropower plant, the thermal expansion reserve without reservation resulted in zero axial clearance, and the cage cracked after running for 500 hours, causing direct loss of 2.2 million yuan, while the WSBC bearing installed according to standards operated continuously for 10,000 hours with nothing unusual.
Checking and verification after installation are required. When WSBC vibration analyzer with sampling frequency 50 kHz is used for the bearings’ monitoring, the effective value of vibration velocity must be less than 2.8 mm/s (ISO 10816-3 standard), and the amplitude of fault frequency in acceleration envelope spectrum must be less than 0.5 m/s². According to Goldwind Technology’s records, specification installation of capable WSBC spindle bearings reduced the average annual failure downtime of the fan from 72 hours to 8 hours, increased the power output by 15%, and reduced the payback period for investments by 2.3 years. These figures confirm specification installation as the secret to unleashing WSBC Bearing performance potential.