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Turntable bearing installation and maintenance
Each set of turntable bearings should be fitted prior to installation of the host plane should be accompanied by the necessary checks required in addition to supporting the bearing parts should have sufficient rigidity, the connection surface should be machined and remove surface debris and wool Slash. The technical requirements for the connection surfaces of the supporting parts shall be in accordance with Table 1. Technical requirements for the bearing surface of the bearing parts Bearing accuracy grade for the user provided turntable bearing ring surface quenching soft zone location mark symbol "S", the user should be installed so that the location of the soft-loading zone or non-load area Frequently load zone (stuffing plug is always located at the soft zone). The implementation of the installation should first radial positioning of the turntable bearings, cross-tighten the mounting bolts, and check the bearing rotation. To ensure smooth bearing transmission, the gear should be meshed before the mounting bolts are not fully tightened. Tighten the bolt should have sufficient preload, the preload should be 70% of the yield limit of the bolt material. Mounting bolts should be equipped with tempered flat washers and the use of spring washers is prohibited. Turntable bearing installation of its fastening bolts must meet the required preload, a variety of different bolt diameter preload under the provisions of Table 2. Maintenance of turntable bearings Turntable bearings installed and put into operation after a continuous operation of 100 hours, should be a comprehensive examination of the preload torque mounting bolts to meet the requirements, after every 500 hours of continuous operation to repeat the inspection time. Turntable bearing installation should be filled with the appropriate amount of grease, and should be filled while rotating bearings to make the grease evenly distributed. Turntable bearings in the work period of time, will inevitably lose part of the grease, so the turntable in normal operation every 50-100 hours after the interval should be added grease grease, high temperature environment or dust conditions Working turntable bearings, the cycle should be appropriate shorter. When the machine stops running for a long time, it must also be filled with enough grease.