As an electromechanical device that converts the chemical energy of fuel into electrical energy, diesel generator sets are gradually improving in modernization today, especially with the booming development of networks and communication industries. The reliability requirements for power supply equipment are also increasing. Here, we will focus on introducing the causes and solutions of noise generated by diesel generator sets.

When a diesel generator set is running at a speed of 1500rpm, it will produce a noise of 105 decibels at a distance of one meter from the diesel generator set. To prevent the noise from spreading out of the machine room, the noise reduction project should include the following steps.

1、 The treatment of sound absorption and insulation for the entrance and exit of the computer room.

2、 Silencing air ducts designed for the intake and exhaust systems as well as the exhaust gas discharge system.

3、 Wrap the exhaust pipe for sound insulation.

This can not only reduce the heat dissipation of the diesel generator set into the machine room, but also reduce the vibration of the unit during operation, thereby achieving the goal of reducing noise.

The noise of diesel generators can be divided into three parts: mechanical noise, combustion noise, and aerodynamic noise.

Part 1: Mechanical noise is mainly generated by the collision and friction between the moving parts of components such as crankshafts, connecting rods, and gears. The control of mechanical noise should be taken measures during the design phase. For example, reducing the cylinder diameter, increasing the stroke cylinder diameter ratio, reducing the calibrated speed, and developing low-noise diesel generators.

Part 2: Combustion noise from direct injection combustion chambers often becomes the main source of noise in diesel generators. Measures such as changing the advance angle of the nozzle can effectively reduce combustion noise.

Part Three: Aerodynamic noise can be divided into exhaust, intake, and fan noise, with exhaust noise being the main type. The sound level can reach 115-128dBA at a distance of 0.5 meters from the exhaust outlet. The most effective way to deal with this noise is to use a muffler. Silencers can be used in combination with filters.