limiter vibrations concasseur rotor

2020-07-19T06:07:10+00:00

limiter vibrations concasseur rotor

  • Dynamic characteristics analysis of a rotor system with

      Complicated vibration responses of the rotor system with two types of limiters under different rotating speeds are analyzed by spectrum cascades, rotor orbits, normal rubbing forces, amplitude spectrum, timedomain waveform and stator acceleration The results show that the vibration responses of the rotor under the first type of limiter are

  • Cited by: 32
  • Vibration control of rotor system by ultrasonic excited

      We propose a novel method with an ultrasonically excited structure as a vibration limiter to control the vibration of rotor systems The friction between the rotor and the limiter is significantly reduced by ultrasonic lubrication, thereby preventing the occurrence of rubbinginduced thermal bowing, which is commonly observed in traditional vibration limiters In our study, the friction

  • Cited by: 2
  • Vibration control of rotor system by ultrasonic excited

      Vibration control of rotor system by ultrasonic excited limiter Vibration control of rotor system by ultrasonic excited limiter Yao, Hongliang; Zhao, Qian; Wu, Hao; Wen, Bangchun 00:00:00 We propose a novel method with an ultrasonically excited structure as a vibration limiter to control the vibration of rotor systems

  • Rotor system vibration absorber Bell Helicopter Textron

    The vibration absorber of the present invention can be tuned to reduce the perrev vibration induced by the rotor blades For example, on a four blade system the vibration absorber is tuned to reduce four perrev vibrations and in a three blade system it is tuned to reduce three pererev vibrations

  • Cited by: 58
  • Dynamic characteristics analysis of a rotor system with

    On the basis of Ref Ma et al (2013, Mechanical System and Signal Processing, 38, 137–153), the paper adopts a finite element (FE) method to investigate the complicated dynamic characteristics of a rotor system with two types of limiters under multilateral contact and friction conditions when the rubbing occurs between the rotor and limitersThe current study focuses on the effects of

  • Cited by: 32[PDF]
  • Dynamics analysis and experiment research of vibration

      Dynamics analysis and experiment research of vibration response for dualrotor system under rubbing fault Nanfei Wang1, Dongxiang Jiang1 the rubimpact time is so short that the impact between the rotor and limiter can be treated as a pointpoint contact The master body is defined as the rotor and the slave one is the limiter In the above

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  • Periodic Motion Stability of a DualDisk Rotor System

      Rotor System with RubImpact at Fixed Limiter 21 Dynamical Model of the Rotor System with RubImpact at a Fixed Limiter The schematic plot of the rotor system with rubimpacts is shown in Figure 1(a) The shaft rotates at an angular speed ω, and is supported by two journal bearings There are two rigid disks mounted along the shaft

  • Author: Qingkai Han, Zhiwei Zhang, Changli Liu, Bangchun Wen
  • Steam Turbine Rotor Vibration Failures: Causes and Solutions

      Steam Turbine Rotor Vibration Failures: Causes and Solutions Steam turbine rotors bend during operation, but the bearing and supports are designed to keep the

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  • Dynamic characteristics analysis of a rotor–stator system

      tory systems and analyzed the nonlinear lateral torsional vibration characteristics of a rotor contacting with a viscoelasti cally suspended stator Chu and Lu [16] designed a special structure of stator to simulate rub, and studied the nonlinear vibration of a rub impact rotor system, and observed a variety of periodic and chaotic vibrations

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  • Rotor Integrity; Engine Harmonization Working Group

      consider the tolerances and material properties of blades, overspeed limiter, etc, adversely influencing stress levels in the rotor (f) Failure conditions which are of a sudden transient nature (reference paragraphs 3327(a) (d)) are typified by loss ofload failures, ie, characterized by high

  • Steam Turbine Rotor Vibration Failures: Causes and Solutions

      Steam Turbine Rotor Vibration Failures: Causes and Solutions Steam turbine rotors bend during operation, but the bearing and supports are designed to keep the static and dynamic forces under

  • Rotor system vibration absorber BELL HELICOPTER

    USA4,255,084 discloses a device for damping the vibrations of the rotor of a rotarywing aircraft It comprises a base plate, two or more spring retaining structures, a motion limiter, a mass member encircling the motion limiter and one or more inplane springs positioned betweeen each of said retaining structures and one of said outofplane

  • Rotor system vibration absorber Bell Helicopter Textron

    The vibration absorber of the present invention can be tuned to reduce the perrev vibration induced by the rotor blades For example, on a four blade system the vibration absorber is tuned to reduce four perrev vibrations and in a three blade system it is tuned to reduce three pererev vibrations

  • [PDF]
  • Dynamic characteristics analysis of a rotor–stator system

      tory systems and analyzed the nonlinear lateral torsional vibration characteristics of a rotor contacting with a viscoelasti cally suspended stator Chu and Lu [16] designed a special structure of stator to simulate rub, and studied the nonlinear vibration of a rub impact rotor system, and observed a variety of periodic and chaotic vibrations

  • [PDF] Periodic motions of a dualdisc rotor system with

    Periodic motions of a rotor system with two discs are investigated where rubimpacts occur at fixed limiter for a test rig with dual discs First, a finite element (FE) model of the rotor system is developed Then numerical simulations based on the FE model are conducted to study the rotor transverse vibrations of the rotor system under three typical cases with different rotating speeds, rub

  • Vibration Fault analysis for rotor systems by using

    The paper presents a relative novel timefrequency analysis method which applies in the vibration Fault analysis of rotor systems through Hilbert spectral analysis (HSA), the part of the HilbertHuang transform Using this method we analyze the vibration fault characteristics of the rotor system with rubimpact by compared with nonrubbing rotor system both in experiment and simulation

  • HHT Based Analysis on Experiments of Rotor System with

    Based on the demand of engineering, the motion characteristics and timefrequency properties of rotor system with rubimpact at fixed limiter are studied by experiment Three typical cases at different rotating speeds are chosen from the experiment On the basis of traditional amplitude spectrum and shaft center orbit methods, HilbertHuang transformation is applied to the fault signals analysis

  • Periodic motions of a dualdisc rotor system with rub

      Periodic motions of a rotor system with two discs are investigated where rubimpacts occur at fixed limiter for a test rig with dual discs First, a finite element (FE) model of the rotor

  • [PDF]
  • Equilibrage actif des machines tournates : Application

      relative du rotor dans ses paliers, et sont adaptés pour diminuer les vibrations dues aux balourds Cependant, ce contrôle est coûteux en énergie et présente des risques d'instabilité Contrairement au contrôle passif ou actif, les techniques d'équilibrage réduisent directement la source des vibrations

  • Concasseur Primaire Encresant SPR Group

    CONCASSEUR PRIMAIRE Le concasseur principal utilisé par le groupe SPR, en fonction de son adaptation à l’application et les exigences, est le principal concasseur à axe unique JUPITER, fabriqué par LINDNER Cet équipement combine un puissant

  • [PDF]
  • Dynamic characteristics analysis of a rotor–stator system

      tory systems and analyzed the nonlinear lateral torsional vibration characteristics of a rotor contacting with a viscoelasti cally suspended stator Chu and Lu [16] designed a special structure of stator to simulate rub, and studied the nonlinear vibration of a rub impact rotor system, and observed a variety of periodic and chaotic vibrations

  • [PDF] Periodic motions of a dualdisc rotor system with

    Periodic motions of a rotor system with two discs are investigated where rubimpacts occur at fixed limiter for a test rig with dual discs First, a finite element (FE) model of the rotor system is developed Then numerical simulations based on the FE model are conducted to study the rotor transverse vibrations of the rotor system under three typical cases with different rotating speeds, rub

  • [PDF]
  • Dynamics features of a resonant vibromachine with self

    D YNAMICS FEATURES OF A RESONANT VIBROMACHINE WITH SELFSYNCHRONIZING INERTIAL VIBROEXCITERS IN THE PRESENCE OF VIBRATION LIMITERG RIGORY P ANOVKO, A LEXANDER S HOKHIN 2 JOURNAL OF V IBROENGINEERING excitation mode has been actively carried out One of the problems of using vibromachines with selfsynchronizing inertial vibroexciters in resonan ce modes is the high sensitivity

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  • Helicopter FSTD functions and subjective evaluation flight

      cyclic Also flapping limiter can prevent this and give vibration C Semirigid or ‘teetering’ usually composed of two blades rigidly mounted to the hub Rotor hub is free to tilt • Reaction to control has ‘latency’ to pilots because fuselage reacts slowly (since it hangs like a pendulum), but rotor disc reacts immediately

  • Rotary Dampers Vibration Technology ACE Controls Inc

    ACE rotary dampers provide an invisible yet valuable service as a maintenancefree machine element to allow controlled deceleration of rotary or linear movements They are often necessary to make careful opening and closing of small lids,

  • HHT Based Analysis on Experiments of Rotor System with

    Based on the demand of engineering, the motion characteristics and timefrequency properties of rotor system with rubimpact at fixed limiter are studied by experiment Three typical cases at different rotating speeds are chosen from the experiment On the basis of traditional amplitude spectrum and shaft center orbit methods, HilbertHuang transformation is applied to the fault signals analysis

  • [PDF]
  • Fundamentals of motor control STMicroelectronics

      Torque and load angle The output torque of an electrical motor depends on the intensity of the rotor and stator magnetic fields and on their phase relation: ∝𝐵 𝑜 ∙𝐵 𝑎∙sin(𝜃)∝𝑰𝒑𝒉∙𝐬 (𝜽) The angle θbetween the two magnetic field is named load angle The maximum output torque, and then the maximum efficiency, is obtained when

  • Nonlinear stochastic dynamics of a rubimpact rotor

    The vibration displacement of the lowpressure rotor is collected from the impact experiment performed on a dualrotor test rig The analysis result of simulation is identical with the experiment

  • [PDF]
  • FLEXIBLE COUPLINGS NEUPEX, RUPEX AND NBIPEX

    FLEXIBLE COUPLINGS Catalog FLE 102 Edition 2021 EN Introduction E E Torsionally Rigid Gear Couplings ZAPEX ZW 4 4 ZAPEX ZN 5 5 Torsionally Rigid AllSteel Couplings NARPEX, ARPEX 6 6 Flexible Couplings NEUPEX 7 RUPEX 8 8 NBIPEX 9 9 Highly Flexible Couplings ELPEXB 10 10 ELPEXS 11 11 ELPEX 12 12 Fluid Couplings FLUDEX 13 13 Appendix A A FLENDER STANDARD COUPLINGS

  • ESC32 Current Limiter Calibration AutoQuad

    How the Current Limiter works The job of the current limiter is to limit the maximum current allowed on ESC32 This limit is important to set correctly –overcurrent events can damage motors or make them loose sync leading to a rotor failure The current limiter uses an onboard highprecision shunt to measure the current flow

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