In recent years, the construction of urban subways and highway tunnels has entered a peak investment period, and the use of tunnel fans has maintained a rapid growth trend. In our daily life, we can see tunnel fans almost everywhere. Some people still don't know the role of tunnel fans. Let's take a brief look at tunnel fans.
Tunnels and underground railways are tens of meters below the ground surface. Natural wind at the entrance and exit of tunnels and underground railway stations is far from enough. Tunnel fans must be installed to transport and regulate air or remove smoke and dust (exhaust smoke from cars passing through the tunnel). For the needs of staff and passengers.
The tunnel air-supply and exhaust fan is mainly of axial flow type. The requirement is that it can operate automatically according to the concentration of smoke and dust in the tunnel. The adjustable blade is suitable to improve the operation efficiency of the fan, and it can be reversed in the event of a fire to make it fast Exhaust smoke. The underground railroad exhaust fan can be centrifugal or axial, or general tunnel fan. Since it is installed in an underground tunnel, it is best to be small. Since the air supply and exhaust ports are on the ground in the city, the fan noise should be low. Jet or axial fans can be used in short tunnels, long tunnels or underground railways. This fan is used by hanging from the ceiling. Due to the large noise, a muffler cover is needed, and it can be reversed according to the wind direction.
Tunnel fan (jet fan) is a special axial fan, mainly used in the longitudinal ventilation system of highways, railways and subways. Tunnel fans (jet fans) are generally hung on the top or both sides of the tunnel, do not occupy traffic area, do not need to build additional air ducts, and have low soil construction costs; the fans are easy to install, simple to operate and maintain, and are a very economical ventilation method. When the tunnel fan (jet fan) is running, a part of the air in the tunnel is sucked from the end of the fan, accelerated by the impeller, and ejected at a high speed from the other end of the fan. This part of the high-speed airflow with higher kinetic energy transfers energy to other gases in the tunnel, and generates a pressure rise that overcomes the resistance of the tunnel, thereby pushing the air in the tunnel to flow in the direction of the blower jet. When the flow speed decays to a certain extent, the next group of fans continues to work. In this way, the purpose of inhaling fresh air from one end of the tunnel and exhausting dirty air from the other end is achieved.
Tunnels and underground railways are tens of meters below the ground surface. Natural wind at the entrance and exit of tunnels and underground railway stations is far from enough. Tunnel fans must be installed to transport and regulate air or remove smoke and dust (exhaust smoke from cars passing through the tunnel). For the needs of staff and passengers.
The tunnel air-supply and exhaust fan is mainly of axial flow type. The requirement is that it can operate automatically according to the concentration of smoke and dust in the tunnel. The adjustable blade is suitable to improve the operation efficiency of the fan, and it can be reversed in the event of a fire to make it fast Exhaust smoke. The underground railroad exhaust fan can be centrifugal or axial, or general tunnel fan. Since it is installed in an underground tunnel, it is best to be small. Since the air supply and exhaust ports are on the ground in the city, the fan noise should be low. Jet or axial fans can be used in short tunnels, long tunnels or underground railways. This fan is used by hanging from the ceiling. Due to the large noise, a muffler cover is needed, and it can be reversed according to the wind direction.
Tunnel fan (jet fan) is a special axial fan, mainly used in the longitudinal ventilation system of highways, railways and subways. Tunnel fans (jet fans) are generally hung on the top or both sides of the tunnel, do not occupy traffic area, do not need to build additional air ducts, and have low soil construction costs; the fans are easy to install, simple to operate and maintain, and are a very economical ventilation method. When the tunnel fan (jet fan) is running, a part of the air in the tunnel is sucked from the end of the fan, accelerated by the impeller, and ejected at a high speed from the other end of the fan. This part of the high-speed airflow with higher kinetic energy transfers energy to other gases in the tunnel, and generates a pressure rise that overcomes the resistance of the tunnel, thereby pushing the air in the tunnel to flow in the direction of the blower jet. When the flow speed decays to a certain extent, the next group of fans continues to work. In this way, the purpose of inhaling fresh air from one end of the tunnel and exhausting dirty air from the other end is achieved.