During operation, diesel generator sets typically produce noise levels ranging from 70 to 110 dB, which can cause environmental noise pollution and potentially harm the hearing health of operators. In noise-sensitive environments such as hospitals, schools, residential areas, hotels, and office buildings, high-noise generator sets are clearly unsuitable.
Therefore, silent (soundproof) design has become an essential part of modern diesel generator manufacturing.
Below are the core technologies used to reduce noise in diesel generator sets:
1. Soundproof Canopy: The “Shield” Against Noise
The soundproof canopy is the central component of silent design.
It is typically constructed with multi-layer acoustic insulation materials that absorb, block, reflect, and scatter sound waves, effectively reducing noise transmission.
Structural design also plays a crucial role:
· Labyrinth-style air intake and exhaust channels allow adequate airflow while maximizing noise attenuation.
· Reinforced panel construction prevents vibration-induced noise leakage.
2. Silencers: The “Noise Eliminators”
Silencers are another major noise-reduction component.
· Air intake and exhaust silencers use a three-layer acoustic absorption labyrinth design that reduces noise while ensuring adequate airflow.
· Exhaust silencers adopt an impedance-compound structure, dramatically reducing noise generated during exhaust discharge and meeting national noise emission standards.
3. Anti-Vibration Measures: The “Shock Absorbers”
Vibration is a significant source of noise in diesel generator sets.
By installing high-performance vibration isolators between the diesel engine, alternator, and base frame, vibration-induced noise can be effectively minimized.
4. Optimized Canopy Structure: Balancing Space and Functionality
A soundproof canopy must provide effective noise reduction while ensuring accessibility for operation and maintenance.
Key design principles include:
· A rectangular enclosure suitable for indoor and outdoor use
· Structural strength for transport and installation
· Proper internal spacing to house all components without making the canopy unnecessarily large
5. Dustproof & Weatherproof Design: Protection from the Environment
For outdoor applications, generator sets require dustproof and weatherproof capabilities:
· Louver-type air intake and exhaust openings prevent dust, rain, and snow from entering the enclosure.
· Rain canopies and rubber door seals protect the interior from water ingress and further reduce noise leakage.
6. Internal Component Layout: Smart “Space Planning”
A logical internal layout is essential for acoustic performance:
· All components (engine, alternator, radiator, battery, etc.) must be arranged to leave adequate space for airflow and acoustic treatment.
· High-temperature components (turbocharger, exhaust pipe) must be positioned away from sound-absorbing materials to prevent heat damage.
Conclusion
With a comprehensive silent design, diesel generator sets can achieve noise levels below 75 dB(A), fully meeting environmental protection requirements. This significantly enhances their suitability for noise-sensitive locations and improves user comfort.
When selecting a diesel generator set, silent design is a critical factor. It affects not only operational performance and service life but also the health and comfort of users.
If you need any customized silent solutions, feel free to contact the Voltgent team at info@voltgent.com.
