Shangyu Juli Manufacturer Direct Shipping Double directional SDS-10 Tunnel Jet Fan

Shangyu Juli manufacturer's direct bi-directional SDS-10 tunnel jet fan has significantly better efficiency than conventional axial flow fans. The tunnel jet fan product has various performance indicators, corrosion resistance, high temperature resistance, reliability and other technical requirements that are suitable for use in various subways and tunnels, optimizing the system engineering supporting equipment products.

The shell of the tunnel jet fan is formed by imported machine tool spinning and flanging, which ensures the coaxiality and strength of the shell, as well as the radial clearance of the blades. The surface is treated with spray coating, which has a beautiful appearance and excellent anti-corrosion performance.

The fan blades and hub are molded from high-pressure casting machine aluminum alloy, with high product strength and good consistency, ensuring smooth operation of the fan. The fan is equipped with a fully enclosed squirrel cage motor, with insulation level of H and anti-corrosion level of IP55, suitable for various tunnel environments.

Shangyu Juli Manufacturer Direct Shipping Double directional SDS-10 Tunnel Jet FanThere are two specifications: one with muffler and one without muffler [with inlet and outlet collector (diffuser)], and two ventilation forms: one-way jet fan (SDS) and reversible (two-way) jet fan [SDS (R)]. The forward and reverse switching time of reversible jet fans is extremely important in emergency situations. SDS (R) reversible jet fans have two switching methods: electronic and mechanical, which can switch to the rated speed of the fan in 30 seconds.

The specifications of SDS tunnel jet fans range from Ø 630mm to Ø 1600mm, with a high thrust of 3500N. The air volume can be met by changing the number and angle of blades, and suitable fans can be selected for any load and working condition.

SDSSeries tunnel jet fan

1、 Product Introduction

1Purpose:

The SDS series tunnel jet fan is mainly used for longitudinal jet ventilation in transportation tunnels such as highways and railways. The high-speed jet airflow generated by the jet fan is used to push the air in the tunnel to move in the direction of the jet, thereby achieving ventilation and air exchange. However, in the event of a fire in the tunnel, smoke exhaust can be achieved. The medium conveyed by the jet fan is air, and the operating ambient temperature is-25℃~50Between ℃, the dust content and other solid impurities in the medium should not exceed 1%50mg/m³There is no sticky or fibrous substance. When a fire occurs in a tunnel, the ambient temperature isIt can operate continuously for two hours at a high temperature of 280 ℃.

2. The main features of this fan are:

① Corrosion resistance, high temperature resistance, no fracture, no oxidation, fast outlet wind speed, high air volume, low noise.

② Smooth operation, easy maintenance, beautiful appearance, and convenient use.

③ Reversible jet fan can achieve bidirectional ventilation, and when ventilated in reverse, it can reach and exceed 9% of the forward ventilation volume8%To ensure that the tunnel is filled with fresh air.

④ The S produced by our companyDSJet fans can be equipped with high-efficiency impellers developed by our company or imported fan impellers from abroad according to user needs. Dual speed motors can also be used according to user needs, respectively for forced exhaust (smoke) or low-speed ventilation to maintain energy-saving operation.

2、 Technical process

1Fan impeller strength

This series of fans has the characteristics of low noise, corrosion resistance, and high temperature resistance. The fan blades and hub are both made of aluminum alloy material, and the metal mold is die cast as a whole. After metallographic analysis andX-ray inspection is conducted to ensure the strength of the blades and hub. The impeller adopts adjustable blades, which facilitate the adjustment of the fan's air volume and meet the requirements of different working conditions. Our company has digested and absorbed technology from foreign companies, adopting the "secondary calculation method". This technology can calculate and determine the stress at the dangerous section of the impeller, providing strong support for the smooth and reliable operation of the fan rotor.

2. Analysis of fan flow rate and velocity

By software calculation and analysis, the air volume and flow rate of the fan are detected, and the on-site conditions are simulated to ensure that the required parameters are met, thereby achieving the desired on-site conditions.

3. Fan structure

3.1Collector: The collector is streamlined, which can make the airflow entering the fan uniform and smooth, improve the operating efficiency of the fan, and reduce the noise of the fan.

3.2Muffler: Both ends of the fan are equipped with silencers filled with special waterproof and sound-absorbing materials, which greatly reduce the operating noise of the fan and meet environmental protection requirements. Our company determines the required amount of noise reduction for designing sound absorbers and fluid channels based on actual testing of various types of fan operating noise sources and the obtained characteristic data. At the same time, we use narrow rectangular channels with large sound-absorbing material finishes to enhance the sound absorption effect. At the maximum sound level of the noise source of the fan, there are more than one characteristic, and for different characteristics, the requirements for noise reduction are also different. Therefore, the fan adopts an impedance acoustic flow pattern, using a resistive structure for high and medium noise absorption and noise reduction, and an impedance structure for medium and low noise reduction and noise reduction. At the same time, two types of sound-absorbing and noise reducing zones, high and low, are used in the resistive channel to maximize the width of the sound-absorbing cords and achieve noise reduction effects. The muffler is a two-layer cylindrical structure made of galvanized perforated sheet (can also be used according to requirements)1cr13The stainless steel material is used to improve the corrosion resistance and rust removal level of the fan. The inner cylinder is covered with high-efficiency sound-absorbing material, and the outer cylinder is made of high-quality galvanized steel plate. The various components are connected by stainless steel rivets and screws, avoiding damage to the galvanized layer caused by welding, ensuring a beautiful and square appearance, and effectively controlling the airflow dynamic noise and radiation noise. Noise testing range: aligned with the axis of the fan outlet45Angle, distance 10Measure it at a distance of metersA sound level and less than 75dB（A）。

1DMuffler: The length of the muffler at both ends of the fan is equal to the diameter of the fan impeller1 times (without special instructions or requirements, the factory configuration of the fan is 1)DSilencer).

2DMuffler: The length of the muffler at both ends of the fan is equal to the diameter of the fan impeller2When the noise index requirement is high, it can be selected2DSilencers can effectively reduce noise levels.

3.3Impeller: The wing shaped blades and hub are made of aluminum alloy casting, and the stationary blades of the blades can be adjusted to adjust the fan airflow according to the tunnel conditions. Among them, the wheel hub adoptsZG230-450Made of cast steel, with blades made ofZL104Precision casting of aluminum silicon alloy. Its installation angle is adjusted according to different performance requirements of users, and it has undergone strict process manufacturing and strict static and dynamic balance correction. It has undergone over speed testing, reliable operation balance, and balance accuracy can reachG2.0Level (vibration value)≤2.0mm/s）。 High anti wind efficiency, with a reverse flow rate ≥ 9% of the forward flow rate8%The maximum power-off time for the fan to switch from full speed forward to full speed reverse, or from full speed reverse to full speed forward, is 30s. At any time, when the temperature of the air flowing through the fan is 280 ℃, 15Min can change the air 4 times.

3.4Shell: High quality carbon steel is bent and welded, and CNC laser cutting is used to ensure the processing size and appearance are beautiful. The motor is supported inside. The steel structures such as brackets and shells are hot-dip galvanized, and the host is treated with anti-corrosion spray coating, which can be used inRun for two hours in an environment of 280 ℃ without emitting smoke or toxic gases, meeting the needs of tunnel ventilation.

3.5Electric motor: It adopts a jet fan dedicated fan, which is a squirrel cage fully enclosed type, directly connected to the wheel hub, and has a working voltage380V, frequency50Hz， Insulation level F (or H), protection level IP54(orIP55）The cable led out from the motor can be connected to the junction box on the casing of the fan body. The motor is equipped with a lubricating grease nozzle, and the external conduit is connected to the lubricating grease nozzle on the casing of the fan body. The motor can be-30℃~50Operating in an environment of ℃, suitable for an altitude of 3500The operating requirements for the M work are that the bearings are lubricated with sealed grease, capable of withstanding bi-directional thrust, and can operate continuously for a long time. When a fire occurs in a tunnel, the ambient temperature is 2 degrees Celsius80It can operate continuously for two hours at high temperatures of ℃. If you need to use it in high-altitude areas, please let us know when placing an order. If equipped with a dual speed motor, low speed can be used in well ventilated conditions, while high speed can be used in polluted air or in case of fire to achieve energy-saving purposes.

3、 Balance correction

Due to various factors such as uneven material or blank defects, errors in processing and assembly, and even asymmetric geometric shapes during design, the centrifugal inertia force generated by each small particle on the rotating body in engineering cannot cancel each other out. The centrifugal inertia force acts on the machinery and its foundation through bearings, causing vibration, noise, accelerating bearing wear, shortening mechanical life, and in severe cases, causing destructive accidents. Therefore, it is necessary to balance the rotor to achieve the allowable balance accuracy level, so that the amplitude of the resulting mechanical vibration is reduced within the allowable range.

Our company owns20KGto50000KGVarious models and specifications of dynamic balancing machines and on-site dynamic balancing equipment can conduct precise dynamic balancing experiments on the entire series of fans. Its balance accuracy level is controlled withinG2.0mm/s， Superior to mechanical standards (JB/T9101-1999）The prescribed6.3mm/s， Improved the dynamic balance accuracy of the fan rotor, ensuring smooth operation of the fan.

4、 Precautions for fan operation

1Before installation and operation, it is necessary to carefully read these precautions; The installation, maintenance, and repair of fans must be carried out by dedicated personnel.

2Before operation, check whether the motor is grounded. It is strictly prohibited for the motor to run with missing items, leakage, overload, and whether the insulation resistance meets the requirements.

3The motor wiring must be operated by a professional electrician, and the power supply must be cut off during the installation, maintenance, and repair of the fan. It is strictly prohibited to perform maintenance and repair on the fan while it is in operation.

4During the installation of the fan, it is not allowed to damage the fan by collision or welding.

5The installation of jet fans should not only meet the requirements of tunnel design, but also ensure that the axis of the fan is parallel to the centerline of the tunnel, otherwise it will increase wind speed loss.

6When multiple wind turbines are used, in order to reduce the impact on the power grid, they should be started one by one. If they are started directly, they should be started at regular intervals120S.

7When the jet fan switches between forward and reverse directions, it should wait for the impeller to stop before starting the reverse operation.

8The rotation direction and air outlet direction of the unidirectional jet fan shall be indicated on the nameplate.

9For bidirectional jet fans, the rotation direction and outlet direction indicated on the nameplate are the forward direction.