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Study on the characteristics of the slider coupling fault

Slider coupling due to various reasons the centroid or principal axis of inertia and added to misalignment, when in operation will produce the unbalanced centrifugal inertia force, centrifugal inertia coupling force and deflection ( vibration ) phenomenon, known as the rotor imbalance, the imbalance cause shafting vibration, thus affecting the the machine's normal work and life, so its must be paid attention to. The degree of imbalance ( unbalance U ) usually use the rotor mass m and centroid to rotary axis distance r product MR to express, known as the mass-radius product . There are also used in mass units of mass radius product to express, known as the eccentric distance E ( not the geometry meaning of the eccentric mass-radius product. ) MR is the one with the rotor mass relative weight, and the eccentric distance E is a rotor with quality independent absolute quantity. The former more intuitive, commonly used in the given rotor balance operation, which is used to measure the rotor balance. Or detecting balance accuracy, coupling balance grade standard which is based on e to evaluation for flexible rotor with the vibration eccentricity ( n mode ) en=Un/mn, Un, Mn respectively for n modes and modal mass