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Numerical study on a rotational hydraulic damper with variable damping coefficient.

Huiyong Zhao1, Baohua Wang2, Genfu Chen3

  • 1School of Automotive Engineering, Hubei University of Automotive Technology, Shiyan, China. zhohiyong@qq.com.

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|November 19, 2021
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Summary
This summary is machine-generated.

This study introduces a novel adjustable hydraulic rotational damper. Its damping coefficient can be tuned by altering the valve angle based on rotor shaft speed, enhancing rotational machine control.

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Area of Science:

  • Mechanical Engineering
  • Fluid Dynamics
  • Control Systems

Background:

  • Rotational hydraulic dampers offer benefits for designing and controlling rotational machinery.
  • Existing designs may lack adaptability in damping characteristics.

Purpose of the Study:

  • To present a novel hydraulic rotational damper with an adjustable damping coefficient.
  • To analyze the factors influencing the damping coefficient and establish a predictive model.

Main Methods:

  • Dynamic analysis was employed to establish the damping coefficient model.
  • Numerical simulations were conducted to validate the model and assess parameter impacts.
  • A new cam ring slot design was implemented to reduce friction.

Main Results:

  • The damping coefficient is primarily influenced by angular velocity and valve angle.
  • Frictional resistance showed minimal impact on the damping coefficient under most conditions.
  • The adjustable valve mechanism allows for effective control over damping.

Conclusions:

  • The novel hydraulic damper effectively adjusts its damping coefficient via valve angle modification.
  • This adjustability enhances the potential for precise control in rotational machines.
  • The cam ring slot design improves efficiency by reducing friction.