TAILIEUCHUNG - SKF Reliability Maintenance Institute phần 4

Giám sát điều kiện tất cả các chuyên gia, kỹ sư, và giám sát viên chịu trách nhiệm về cải thiện hiệu suất và độ tin cậy của máy móc. Những người tìm kiếm các kỹ năng thực tế trong việc cân bằng máy móc xoay đến mức độ chính xác, cả trong lĩnh vực này và trong các cửa hàng. | Field and Shop Balancing PRM 805 Recommended for All condition monitoring specialists engineers and supervisors responsible for improving machinery performance and reliability. Those seeking strong practical skills in balancing rotating machinery to precision levels both in the field and in the shop. Course Objective To be able to successfully balance common machinery in the field. This includes proper diagnosis of unbalance assessment of balancing requirements methods data acquisition and balancing procedures and special considerations for overhung rotors unusual configurations and influences of other machinery. Course Description This course emphasizes hands-on balancing exercises using tabletop rotor kits and instruments using optical laser and strobe light accessories for phase reference. Proper vibration analysis techniques are reviewed to differentiate imbalance from other problems such as misalignment and resonance. Analysis techniques include typical unbalance signatures FFT with phase bump test run-up and coast-down tests and time waveform. Precision balancing techniques can be applied to save balancing time in the field or in a shop-balancing machine. Case histories are presented to illustrate single plane static two-plane dynamic and the static and couple approach to balancing rotors of all types. Vibration analysis - the first step in field balancing Fourteen votes that confirm unbalance Resonance misalignment and other problems that might look like Unbalance - what balancing technique will be successful Single plane two-plane or static and couple approach Use amplitude and phase measurements to determine approach L D ratio rotor response to trial weight can confirm Amount and location of trial weight and balancing in one run Rotor response calibration factor and lag angle Single plane static balancing Vector diagram solution to help understand single plane technique Balancing without phase - 3 and 4 circle methods Instrument and calculator computer .

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