In order to acquire in-depth knowledge of various vibration symptoms of machinery failure, a controlled experiment is necessary using a real machine-like device. It is advantageous to analyze only through a single machine fault, and it is also necessary to understand the correlation between dynamic stiffness, resonance and speed in order to analyze the actual vibration spectrum. MVS has been developed to refine the expertise needed to diagnose industrial machine problems with well controlled experiments.

Detailed Description

Assembling all possible parts, defective and normal, together in one structure the replacement work is minimized and very easy. It adopts the special pillow block on which defective and normal bearing installed together so that these are easily switched to be engaged in and out separately. This innovative design allows users to save a lot of time and effort and focus on vibration measurement and analysis.

One pulse per revolution tacho signal output is provided for learning rotor balancing, and the rotor disk has two rows of 18 M6 tabs to allow the mass to be inserted into any position.

In addition the Automatic Unbalance Rotor(AUR) installed on the left side is designed to change unbalance mass during operation. So, the trend of increasing unbalance fault occurring in the actual rotating machine in long time can be simulated in a short time.

Misalignment fault also can be easily generated by turning jack bolt, and very precise adjustment is possible by using equipped dial gauge. So you can make long term trend of misalignment fault in a short time very easily.

Study of vibration spectrum for various defects and learning of defect detection method

  • Angular misalignment / Parallel misalignment
  • Unbalance (single / multi plane, center hung / overhung)
  • Bearing defects(BPFO, BPFI, BSF, FTF)
  • Eccentric rotor
  • Rubbing
  • Mechanical looseness
  • Soft foot
  • Gearbox problems

Learning of machine condition monitoring and predictive maintenance concepts

  • Vibration due to unbalance change during operation
  • Vibration due to misalignment during operation
  • Resonance / Critical speed analysis technique and method of controlling it
  • Root-cause analysis
  • Sensor installation technology and optimal measurement location
  • Shaft alignment method
  • Phase measurement technique
  • Use of proximity sensors and accelerometers
  • Low speed machine monitoring procedure
  • Analysis of motor current signal

Analysis methods for various applications

  • Mechanical Foundation Design
  • Coast-down and start-up tests
  • ODS and modal testing during operation
  • Correlation between vibration and motor current spectrum
  • Troubleshooting machine problems
  • Identification of predictive maintenance strategies and procedures
  • Modeling of rotor dynamics and its effect on vibration spectrum
Electrical Specifications

  • Motor : ½ Hp 3-phase AC Motor, Siemens
  • Controller : Delta VFD-M Inverter
  • Maximum motor RPM : 10,000 (for short time)
  • Speed ​​Range : 0 ~ 10,000 rpm Variable
  • Display 1 : RPM in 7 Segment LED display, up to 20 times/second
  • Display 2 : Velocity vibration of inboard bearing
  • Display 3 : Velocity vibration of outboard bearing (option)
  • Output 1 :  Velocity signal output for inboard bearing
  • Output 2 :  Velocity signal output for outboard bearing (optional)
  • Output 3 :  Tacho signal output, one pulse per revolution, 6V TTL
  • Gap sensor (optional) : 2 sensors installed at 90 °, 2 demodulators, 2 displays
  • RUN/STOP switch : On/Off switch, when ON operates at the same rotational speed as previously set
  • Power : 230 VAC, single phase, 50/60 Hz

Mechanical Specifications

  • Shaft : 20mm diameter, steel
  • Bearings : 2 normal bearings, 1 inner race defect bearing, 1 outer race defect bearing
  • Pedestal : 2 pillow blocks with three bearing mounting holes for bearing movement

                            Built-in accelerometer in inboard pedestal

                            Built-in accelerometer in outboard pedestal (optional)

  • Rotor Disk : 2 pieces of 150Փ aluminum rotors with 63 holes in 5 rows of M8 screw
  • Automatic Unbalance Rotor(AUR) : 162Փ aluminum rotor with 18 M8 holes at 150mm dia, 40gr unbalance mass is moving 15mm for 40 second
  • Gearbox : Spur gear with 64 teeth and 100 teeth, with magnetic brake
  • Alignment Mechanism : – Sufficient height (270mm) to allow 360 ° rotation of alignment zig

                                                 – Motor has soft foot (0.6, 0.4, 0.2, 0.2mm)

                                                 – Knob Screws for horizontal movement

  • Magnetic Brake : Manual adjustment, 0.06-1.20 Nm(0.5-10.6 lb-in), weight: 1.6 kg
  • Base : aluminum, 10mm thickness
  • Safety cover : Lockable transparent plastic cover has interlock switch that stops the motor when the cover is open

Physical Specifications

  • Weight : Approximately 60kg
  • Size : Length = 830mm, Width = 400mm, Height = 370mm (with safety cover)