VB-326-W Vibration Motor

VB-326-W Vibration Motor General specification:

Model Type	VB
Phase	3 phase
Vibratory Force	3 KN
Rated Power	0.25 KW
Speed	950 RPM
Installation dimension	140*100 MM
Rated Voltage	220/380V/400V/660V
Duty	Continuous S1
Frequency	50/60 HZ
Protection Class	IP54/IP55
Insulation Class	B/F/H

 

Systematic Noise Reduction Measures for Vibration Motors
(From Design and Installation to Maintenance)

Noise control follows the "Source – Path – Receiver" principle:
control the source first, then block the transmission path, and finally protect the operator.

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A. Source Control (Most fundamental and effective)

Optimize bearing selection and assembly:

Use special bearings for vibration motors, such as roller bearings with C4 or larger clearance (e.g. VA405, VA408), designed to withstand impact loads.

Ensure precision assembly with correct tolerances; use thermal fitting and avoid hammering.

Apply proper lubrication: use high-speed, high-temperature grease (e.g. lithium-based). Follow specified quantity and intervals, as over-greasing causes heat and noise.

Optimize eccentric block design:

Dynamic balancing of the rotor with eccentric blocks before delivery to reduce unbalance forces.

Anti-loosening design: use high-strength bolts, disc spring washers, and thread-locking adhesive.

Motor structural design:

Increase rigidity: thicker housing and end covers to raise natural frequency well above operating frequency (typically >1.25×) to avoid resonance.

Add damping: apply damping coatings inside the housing to absorb vibration energy.

Low-noise fan: use backward-curved blades and streamlined fan covers.

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B. Transmission Path Control (Installation & system measures)

Optimize mounting structure and foundation:

Increase equipment stiffness: reinforce screens, chutes, and frames to prevent panel resonance.

Use elastic elements: install rubber or composite springs between equipment and foundation to isolate vibration, much more effective than steel springs.

Heavy foundation: for large machines, use a thick concrete foundation with mass much greater than the equipment to absorb vibration.

Apply damping panels:

Bond constrained-layer damping sheets on side plates and covers to reduce vibration radiation noise.

Install sound barriers or enclosures:

Local enclosures: removable metal covers lined with sound-absorbing materials (glass wool, rock wool + perforated metal).

Sound barriers: protect operator areas around the machine.

Note: Enclosures must ensure proper ventilation and cooling with silenced air ducts.

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C. Operation and Maintenance (Lowest cost, quick results)

Regular tightening:

Periodically tighten all bolts, especially motor mounting bolts, eccentric block bolts, and structural connections, using a torque wrench.

Condition monitoring and timely maintenance:

Listening checks for bearing noise changes.

Temperature monitoring of bearing housings.

Vibration analysis using portable instruments to detect abnormal trends early.

Process parameter optimization:

When possible, reduce vibration amplitude and frequency (by adjusting eccentric block angle or using a VFD), which directly reduces excitation force and noise.

 

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