The effectiveness of the bearing contact seal and seal between the physical contact

Bearing - Comfortable and durable - Self-aligning roller bearing electricity department author on July 18, for you to explain: the effectiveness of the bearing contact seal and seal between the physical contact, which are made of synthetic rubber, synthetic resin, felt, synthetic rubber oil seal lips are most often used. （ 1) Many types of oil seal oil seal to prevent lubricant from leakage and prevent dirt, water and other foreign material into the spherical roller bearing this kind of oil seal is a standard according to the type and size. Because a lot of oil seal with a circumferential spring keep sufficient contact force, oil seal can follow axial uneven rotation movement to a certain extent, the sealing lip usually includes nitrile synthetic rubber material, acrylic ester, fluorine and silicone. Four fluorine also use ethylene. Maximum allowable working temperature rise of each of the same order. Synthetic rubber oil seal may cause the fault overheating, wear and seizures, unless there is a membrane between the oil sealing lip on the shaft. So some lubricant should apply to the sealing lip seal installation. Lubricant is ideal inside a house scatter point sliding surface. Oil seal allows circumferential speed according to the type of shaft, smooth finish and change surface, sealing liquid, temperature, eccentric shaft, etc. Oil seal in the temperature range for the lipstick. Approximate circular surface velocity and temperature in the favorable conditions, listed in the table. The effectiveness of the bearing contact seal and seal between the physical contact: when the circumferential surface at high speed or high when using the oil seal shaft under the pressure of contact surface must be smooth completion, shaft eccentricity ratio should be less than 0. 02 to 0. 05mm。 Axis of the contact surface should be through the heat treatment hardness is higher than HRC40 or hard chromium plating for wear resistance. If possible, hardness is greater than the HRC. Contact surface finish approximation degree need several axial circular surface. （ 2) Felt seal feel seal is one of the simplest and most common. Seal for drive shaft, etc, however, due to the permeability of oil and oil leak if use, is inevitable, can only use this type of seal for grease lubrication, mainly to prevent dust and other foreign material into the. Mat mat is not suitable for circumferential surface at a faster rate than 4 m/SEC; Therefore, it is better to replace them synthetic rubber seal depends on the application. Bearing comfortable and durable, )