Silent diesel generator sets significantly reduce the operating noise by utilizing advanced sound insulation technology and noise elimination equipment, playing a crucial role in various fields. The following will introduce it from aspects such as working principles, structural features, performance parameters, and application scenarios.
Working Principles
Power Conversion It uses an internal combustion engine as the power source to drive the generator for power conversion. Diesel fuel burns fully within the cylinder, generating a powerful thrust that pushes the piston downward, driving the crankshaft to rotate. The generator rotor, which is coaxially installed with the crankshaft, then rotates accordingly. Based on the principle of electromagnetic induction, the generator outputs an induced electromotive force, and an electric current is formed in the closed load circuit, continuously outputting electrical power.
Noise Reduction Principle A variety of noise reduction measures are comprehensively applied. For example, a multi-layered shielding impedance mismatch type sound insulation cover is used, effectively blocking the outward propagation of noise. An efficient noise reduction type multi-channel intake and exhaust passage is created to reduce the noise generated by gas flow. A large-scale impedance composite muffler is equipped to significantly reduce the noise of exhaust gas emissions. At the same time, the engine is carefully optimized in design, and shock absorption devices are installed to reduce the generation and propagation of vibration and noise from the source.
Structural Features
Vibration Damping Facilities High-performance shock absorbers are installed between the diesel engine, the generator, and the bridge frame. These shock absorbers can greatly reduce the vibration generated during operation, thereby decreasing the noise caused by the vibration.
Sound Insulation Cover It is usually composed of four to five layers of sound-absorbing materials, which have excellent sound-absorbing and sound-insulating effects. The structure of the sound insulation cover door is similar. The windows are made of double-layer glass, and the doors, windows, and the sound insulation cover are tightly sealed to prevent noise from leaking out in all directions.
Intake and Exhaust Muffling Bodies Both are of a labyrinth structure made of three layers of sound-absorbing materials. While ensuring smooth intake and exhaust, they effectively seal the noise and maintain good noise reduction performance.
Exhaust Muffler An impedance composite muffler is selected, which effectively reduces the noise during exhaust gas emissions, ensuring that the emissions meet strict national standards.
Others The power cable connection adopts a fixed junction box structure, which is directly connected outside the box body, making it convenient for operation and maintenance. A large-capacity fuel tank is installed inside the box body to ensure long-term power supply requirements. An observation window is also provided for real-time monitoring of the unit's operation status, and an emergency shutdown button for malfunctions is installed to enable quick shutdown in case of emergencies.
Performance Parameters
| Item | Details |
|---|---|
| Engine Model | Weichai WP 6D 167E 200 |
| Power | 150kW |
| Motor Model | LY274G |
| Noise Level | At a distance of 6 meter from the unit, the noise limit is usually 75dB(A) or 80dB(A) |
| Voltage Regulation Rate | Steady-state voltage regulation rate ≤ ±1% or ≤ ±0.5%; Transient voltage regulation rate ≤ +20% or +15% |
| Frequency Regulation Rate | Steady-state frequency regulation rate ≤ 5%, Transient frequency regulation rate ≤ ±10% |
| Rated Voltage | Commonly 400V |
| Rated Speed | Generally 1500r/min |
| Rated Frequency | 50Hz |
| Rated Power Factor | 0.8 (lagging) |
Application Scenarios
Commercial Field Places such as shopping malls, hotels, and office buildings have extremely high requirements for the business environment and customer experience. When there is a power outage, the silent diesel generator set can quickly start working and provide stable backup power. At the same time, its low noise characteristics will not interfere with the normal business order, ensuring the smooth progress of commercial activities.
Medical Field All kinds of medical equipment in hospitals have extremely strict requirements for the stability of power supply. In the event of a power grid failure, the silent diesel generator set can reliably ensure the continuous operation of medical equipment and will not interfere with the medical environment due to noise, safeguarding the lives of patients and the orderly conduct of medical work.
Educational Field Schools require a quiet teaching environment. During a power outage, the silent diesel generator set can supply power to teaching buildings, laboratories, and other areas, ensuring that teaching activities are not affected and maintaining the normal teaching order.
Industrial Field The production equipment in factories may suffer serious losses in case of a power outage. As a backup power source, the silent diesel generator set can maintain the operation of production equipment at critical moments, reducing the economic losses caused by power outages.
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