The circular duct fan is an ideal ventilator with perfect combination of performance and appearance. The clever cooperation between the newly designed casing and the backward inclined centrifugal impeller will make the hydrodynamics of the gas to the extreme, and its shape is small and practical. It is easy to install, light weight, and low noise. Next Xiaobian introduced round pipe fan installation procedures and circular pipe fan features.
Circular duct fan installation procedure
1, check the foundation
First check the outer dimensions of the foundation and the center size of each reserved void; the dimensional deviation of the foundation should be in the range of ±20mm and the center size deviation of each reserved void should be within ±10mm; the base line should be the main building construction base point. Or boiler vertical and horizontal center line as the benchmark.
2, chisel foundation and coarse positioning
Place the anchor bolts and the horns to be placed under the thick horns. The horn should be placed on the main force platen of the equipment and the stand frames of the machine frame or on both sides of the anchor bolts. Of course, the horns should be as close as possible without affecting the secondary grouting. Anchor bolt holes; note that the manufacturer's installation markings are usually one "A" and "B" number, and attention should be paid to the relationship between the inlet and outlet ducts and the direction of rotation of the impeller.
3, fixed anchor bolts
After the collector bell is inserted into the impeller and fixed with wire, the entire rotating group is lifted into a predetermined position; when the anchor bolt is installed, the bending degree of the anchor bolt should be ≤ L/100 (L is the length of the anchor bolt). The bottom of the bolt should not touch the hole bottom or hole wall. The anchor bolts should be evenly distributed and the bolts should be exposed to 2 to 3 buckles; then, loosen the wire to fix the lower part of the collector and the lower half of the housing with bolts to initially adjust the gap between the impeller and the bell mouth.
4, fan rotation group
The verticality between the fan main shaft and the bearing seat is determined by the following method: the magnetic seat is affixed to the main shaft, and the dial indicator head is directed to the outer ring of the bearing or the elastic surface of the bearing seat (both the upper cover working surface); At this time, the reading of the hands of the rotating spindle for more than one week is not more than 0.15mm, and the reading value is the vertical condition of the bearing housing and the main shaft.
Adjust the coaxiality of the fan and the motor shaft (both shaft coupling leveling). With three dial gauges to find positive, axial two, a radial; each axis 90 degrees, record the data, measure the readings of its up and down, adjust the coaxiality to make the error ≤0.05mm; and two backrests There should be a 10mm gap between the wheels. After correcting, review the shaft center height and other data and make a record.
5, install the air box
Install the air inlet box and inlet adjustment baffle door and the rest of the fan, adjust the baffle to rotate flexibly, otherwise it should be lubricated and rotated until flexible to install; the leaf plate should be fixed securely during installation and have sufficient expansion gap with the shell. Adjust the operating device should be flexible and correct, consistent action, opening instructions marked in line with the actual; should pay attention to the opening direction, can not be loaded reverse, the direction of the inlet and impeller rotation direction is the same.
Round pipe fan features
1. The control parameters of the duct fan are air volume, full pressure, efficiency, noise, motor power and so on.
2, according to the physical and chemical properties of the gas being transported, choose different uses of the fan. Such as the transmission of clean air, should choose the general fan; transport flammable, explosive gas, should choose explosion-proof fan; transport corrosive gas, corrosion resistant fan should be used.
3. When choosing the type of ventilator, consider the leakage loss of the pipe system, the calculation error, and the negative deviation between the actual air volume and the air pressure of the ventilator. Generally, the air volume is 1.05 to 1.1 and the air pressure is 1.10 to 1.15. However, it is not too large to prevent the ventilator from operating in the low-efficiency zone for a long period of time.
4. Note the matching relationship between the resistance characteristics of the pipe network and the characteristics of the fan. For stable operation of the ventilator, the ventilator should be operated near its highest efficiency point. The operating point of the ventilator is located on the right side of the full pressure peak point of the performance curve (ie, the high volume side, and is generally located at 80% of the full pressure peak). ).
5. For the ventilation system with silencing requirements, first select the fan with high efficiency and low impeller peripheral speed, and make it work near the highest efficiency point. The noise and vibration propagation methods of the ventilation system should also be adopted to take appropriate measures for noise reduction and vibration reduction.
6, the pipe ventilator is through the change of the shape of the blade, so that after the airflow enters the fan, there is part of the axial flow, but also a part of the centrifugal effect, so its performance is between the axial fan and the centrifugal fan.
7. The duct fan can provide the medium pressure and moderate air volume. The ventilation system used in high-rise civil buildings is suitable.
Editor's summary: The circular fan installation steps and circular duct fan features are introduced here. I hope to be helpful to everyone. If you want to know more related information, you can pay attention to this website information.
Pipeline circular fan
In light of the defect existing in the artificial Chemical Dosing System in Jinzhou Oil Production Plant,the automatic chemical dosing system was developed.The control task of the system mainly deals with the adding of two chemicals.The different control schemes are adopted to control two piston pumps and one salt-feeding electric motor.It is characterized by high reliability,flexible structure,friendly interface and easy operation.The system hardware mainly consists of host computer,slave computer and field instruments.The field application shows that the system has solved the defect of artificial chemical dosing,achieved automatic management and saved large amounts of manpower.The chemical dosing volume fraction of the injected water is completely in agreement with the design requirement and the development efficiency of water injection is thus ensured.
Chemical Dosing System For Oilfield
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