Rigid rotor test bench system

function

The rigid rotor vibration test bench can be used for teaching demonstrations and also for dynamic testing research. It should have the characteristics of compact structure, small volume, easy operation, multiple experimental projects, and advanced testing methods. Combined with testing software, the following experiments can be conducted:

1. Acceleration sensor vibration measurement experiment;

2. Vibration measurement experiment of speed sensor;

3. Magnetic electric sensor speed measurement;

4. Measurement of rotational speed using photoelectric sensors;

5. Calculation of rotor dynamic balance parameters;

6. Axis trajectory measurement;

7. Measurement of dynamic balance weight.

Experimental bench parameters

1. Motor: Type: DC brushless; Speed: 0-4000 revolutions per minute; Quantity: 1 unit.

2. Shaft: Material: 40GR; Specification: Step shaft with a total length of 510mm; Quantity: 1 piece.

3. Bearing seat: Material: 45 steel; Support form: flexible support; Quantity: 2 sets.

4. Rotor: Material: Stainless iron; Size: φ 100mm × 22mm; Quantity: 3 sets.

5. Base: Material: 45 steel; Structure: T-shaped groove with self positioning design; Surface treatment: plating; Quantity: 1 unit.

6. Protective cover: Material: PVC; Overall protection; Quantity: 1.

7. Sensor: Eddy current displacement sensor, quantity: 2 pieces; Photoelectric sensor, quantity: 1 piece.

4、 Control system

Composed of a 4.3-inch touch LCD screen, driver, power supply, controller, etc; Manual speed regulation: potentiometer controls the speed; Automatic speed regulation: set time, set speed, and automatically increase speed; Connect to the motor through an aviation plug.

5、 Data collector

1. Number of channels: 4 analog channels+4 phase channels.

2. Sampling frequency: 4-channel maximum synchronous sampling frequency204.8kHzSynchronous continuous sampling frequency0.128Hz.

3. Input voltage range: ±10V.

4. Dynamic range: 140dB.

6. Frequency accuracy: better than0.001%.

7. Data transmission and power supply interface: USB interface for data transmission and power supply.

8. Phase channel input:4The phase input channel is used to test the frequency modulation part signal in the frequency modulation signal; Dynamic signal of vibrating wire strain sensor; Vibration analysis and torsional vibration analysis of rotating machinery; Gear fault diagnosis, etc. sampling frequency156.25MHzEnsure phase accuracy. Phase channel adaptability:TTLPhase signals from eddy current sensors, photoelectric sensors, encoders, Hall speed sensors, magneto electric speed sensors, etc. The collector comes with functions such as shaping, amplification, and protection.

9. Protection function: USB port: 3500V voltage ESD protection; Analog channel and phase channel: Each channel should have a surge protection of no less than 500A and a voltage protection of 30V.

6、 On site dynamic balancing software

1. Using influence coefficients for on-site rotor dynamic balancing, single-sided balancing and double-sided balancing can be performed, using acceleration sensors, velocity sensors, displacement sensors, residual vibration testing, and balance report output.

2. Dynamic balance calculator:

（1) Keyless phase dynamic balance calculator (amplitude measurement balance method, low-speed resonance method);

（2) Rigid rotor phase balancing calculator (high-speed phase dynamic balancing method);

（3) Flexible rotor modal analysis and harmonic component method calculator;

（4) Flexible rotor vibration mode influence coefficient method calculator;

（5) Multi support rotor dynamic balancing (least squares algorithm) calculator.