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RISNonlinear Identification of Mechanical Parameters in a Squeeze Film Damper With Integral Mechanical Seal
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: End seals in squeeze film dampers (SFDs) aid to increase their damping capability while maintaining low lubricant flow rates and reducing the severity of air ingestion. This paper presents ...
Identification of Force Coefficients in a Squeeze Film Damper With a Mechanical End Seal—Centered Circular Orbit Tests
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The damping capability of squeeze film dampers (SFDs) relies on adequate end sealing to prevent air ingestion and entrapment. The paper presents the parameter identification procedure and force ...
A Model for Improved Prediction of Force Coefficients in Grooved Squeeze Film Dampers and Oil Seal Rings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Squeeze film damper (SFD) designs typically implement supply grooves to ensure adequate lubricant flow into the film lands. Oil seal rings, of land film clearance c, also incorporate short and ...
Identification of Force Coefficients in a Squeeze Film Damper With a Mechanical Seal: Large Contact Force
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Squeeze film dampers (SFDs) aid to reduce excessive vibration levels due to rotor imbalance and to raise stability thresholds in rotor-bearing systems. SFDs commonly include end seals to increase ...
Identification of Structural Stiffness and Damping Coefficients of a Shoed-Brush Seal
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The multiple-shoe brush seal, a variation of a standard brush seal, accommodates arcuate pads at the bristles’ free ends. This novel design allows reverse shaft rotation operation and reduces ...
Identification of Squeeze Film Damper Force Coefficients From Multiple-Frequency Noncircular Journal Motions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In rotor-bearing systems, squeeze film dampers (SFDs) provide structural isolation, reduce amplitudes of rotor response to imbalance, and in some instances, increase the system threshold speed of ...
Identification of Force Coefficients in a Squeeze Film Damper With a Mechanical End Seal—Part I: Unidirectional Load Tests
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Squeeze film dampers (SFDs) with low levels of external pressurization and poor end sealing are prone to air entrapment, thus not generating enough damping capability. Single frequency, unidirectional ...
Squeeze Film Damper With a Mechanical End Seal: Experimental Force Coefficients Derived From Circular Centered Orbits
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The paper presents parameter identification measurements conducted on a squeeze film damper (SFD) featuring a nonrotating mechanical seal that effectively eliminates lubricant side leakage. The ...
A Novel Bulk-Flow Model for Improved Predictions of Force Coefficients in Grooved Oil Seals Operating Eccentrically
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Oil seals in centrifugal compressors reduce leakage of the process gas into the support bearings and ambient. Under certain operating conditions of speed and pressure, oil seals lock, becoming ...
Measurements of Leakage and Power Loss in a Hybrid Brush Seal
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Simplicity, low cost, and easy replacement make labyrinth seals the primary seal type in gas turbines. However, excessive leakage and potential for rotordynamic instability are well known issues. ...