How to install tapered roller bearings?
Before the bearing is installed, it should be cleaned with gasoline or kerosene, used after drying, and ensure good lubrication. The bearing is generally lubricated with grease, but also can be lubricated with oil. When using grease lubrication, the grease with high performance such as no impurities, anti-oxidation, anti-rust and extreme pressure should be used. The grease filling should be 30%-60% of the bearing and bearing housing volume, and should not be too much. The double row tapered roller bearing with sealed structure and the water pump shaft bearing have been filled with grease, which can be used directly by the user and cannot be cleaned again.
When the bearing is installed, an equal pressure must be applied on the circumference of the end face of the ferrule to press the ferrule in. Do not directly hit the end face of the bearing with tools such as a hoe to avoid damage to the bearing. In the case of small interference, the end face of the bearing ring can be pressed with a sleeve at normal temperature, the sleeve can be hit with a hoe, and the ring can be pressed in evenly through the sleeve. If a large number of
When installing, a hydraulic press can be used. When pressing in, it should be ensured that the end face of the outer ring and the end face of the shoulder of the shell, and the end face of the inner ring and the end face of the shaft shoulder are pressed tightly, and no gap is allowed.
When the interference is large, it can be installed by oil bath heating or inductor heating bearing method. The heating temperature range is 80C-100C, and the maximum cannot exceed 120C. At the same time, tighten the bearing with nuts or other appropriate methods to prevent the bearing from shrinking in the width direction after cooling and causing a gap between the ring and the shaft shoulder.
The clearance adjustment should be carried out at the end of the installation of the single row tapered roller bearing. The clearance value should be determined according to different operating conditions and the size of the interference. When necessary, tests should be carried out to determine. The double-row tapered roller bearing and the water pump shaft bearing have been adjusted for clearance at the factory, and do not need to be adjusted during installation.
After the bearing is installed, a rotation test should be carried out. First, rotate the shaft or bearing box by hand. If there is no abnormality, run it with power without load and at low speed, and then gradually increase the rotation speed and load according to the operating conditions, and detect noise, vibration and temperature rise. , If any abnormality is found, the operation should be stopped and checked. After the running test is normal, it will be delivered to use.
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