On the market there are ready-made sound insulation window for sale, but these sound insulation window structure is complex, expensive, high installation requirements, construction is not convenient. According to the arrangement of the window of the fan room, we designed two rows of double layer sound insulation window as shown in figure 2. The sound insulation and sound insulation window is made of glass, the thickness of glass layers, each layer between the air layer thickness, the window sash and the window frame sealing structure, sound insulation window installation and construction technology and other related factors. Theoretically, the thicker the glass, the more layers of the glass window, the thicker the air layer, the better the soundproof effect of the soundproof window. But at the same time with 3 to create a complex insulation window, high cost, construction difficulties and a series of problems. In order to meet the requirements of noise reduction and lower cost, in order to achieve the sound insulation capacity 40dB (A) or above, the design of the double layer structure of the sound insulation window. According to the spectrum characteristics of fan noise, different thickness of glass. Two layers of glass are used to eliminate the influence of resonance on sound insulation. The thickness of the air layer between layers is determined according to the noise spectrum and the required sound insulation. The contact part of the glass and the window frame, the window frame and the wall surface with special blankets and other sealing structure between the layers is designed muffler structure.

Sound insulation window fan inlet noise control we opened a door in the south wall of the fan room, in order to solve the problem of SJ-11K1, SJ-12K1 two intake fan. In order to make the fan noise radiates from the door, we installed a muffler in the doorway.

The muffler design air volume 30000m3Ph. to make the muffler pressure loss is small, large amount of noise, specially designed for impedance composite structure. The air intake passage design of muffler special form, which can eliminate the low-frequency noise produced by the blower, and can eliminate the high frequency noise generated by the centrifugal fan. In order to facilitate the operation of the workers out of fan room inspection equipment operation, the muffler is installed on the side face a convenient door switch.

The design of the fan cooling system is very important in the case of sound insulation door and sound insulation window. If this problem can not be solved well, there will be a heat storage in the fan room, and the fan will not be able to run normally.

We consider the design as follows: the use of SJ-11K1, SJ-12K1 two Typhoon aircraft needs to inhale the air characteristic from the fan room, inlet position design in the most need of cooling SJ-11K1 Ronaldo upstream blower, the blower room wall at the door. With the cooling air temperature of the indoor environment of the same design of wind speed and direction (511mPs), SJ-12K1 SJ-11K2, SJ-11K1 blow to the three wind turbines, cooling air to absorb heat into hot air after inhalation by SJ-11K1 and SJ-12K1 two blower inlet, into the system. By controlling the flow direction of the cooling air, the temperature field in the fan room as far as possible to meet the design requirements, avoid local regenerative phenomenon inside the room, cooling air is continuously sent to the wind room, according to the calculation of heat transfer design, cooling air is 27000m3Ph, the number of ventilation fan room to reach 58 Ph, far greater than the cooling needs can be to ensure the safe operation of the blower. After 5 days of construction, the noise control results have been completed and installed in the fan room noise control system (in the case of normal production). Compared with the sound absorption method, the noise comprehensive control scheme should save about 60% of the cost. A comprehensive test of noise in the client requirements examination, although the test of sulfonated Workshop on exhaust noise of 7315dB air traffic control (A), the influence of noise on the assessment point of great, but the point is still the noise assessment all meet the design requirements, control effect is very good. Generally, the noise reduction of fan should be integrated, and different methods should be adopted according to the actual situation. We design the sound insulation door, sound insulation window, air intake muffler is simple to manufacture, low price, noise reduction effect is very obvious, the use of sound insulation door, sound insulation window, muffler is a good way to control the noise of the fan room.