Mobile adjustable depot fan 1

The main purpose of the special grain depot type centrifugal fan for indoor ventilation in general factories and large buildings or the air transport and other non flammable, explosive, volatile, gas harmless and non corrosive to steel. However, the transport of gas shall not contain viscous substances, dust and hard particles containing not more than 150mg/m3, the gas temperature shall not exceed 80 degrees C.
The special grain depot type centrifugal fan fan is first used in China, but also the use of the most common fan, from high-rise buildings to the underground railway, air blast from the boiler to the plant, from the northern border to the South China Sea, from the west to the east side of the vertical plateau, everywhere.
Type
From one end of the motor face, where the impeller clockwise rotation are known as "right whirlwind machine" to "right", otherwise it is called "left whirlwind machine" to the left.
The fan outlet position in said casing outlet angle, the No2.8~6 type wind turbine special grain depot are made of a type in the factory, the use of units according to the requirements to install into the desired position, in order to indicate. Where: No2.8 outlet position adjustment range is 0 DEG ~225 DEG, interval is 45 degrees; No3.2~6 outlet adjustment range is 0 DEG ~225 DEG, interval is 22.5 degrees; No8~12 outlet adjustment range is 0 DEG ~225 DEG, interval is 45 degrees; No16, the 20 air outlet angle made fixed 0 degree and 90 three degrees and 180 degrees, can not be adjusted, specify when ordering.
The transmission mode of the fan is A, B, C, D four: No2.8~5 uses A type transmission, No6 both A transmission and C transmission, No8~12 using C, D type of two transmission mode, No16~20 using B transmission.
If the machine number, transmission mode, outlet angle can not meet the needs of your production, I plant the ability to transform or design for you until you are satisfied.
Structure
The fan No2.8A~6A mainly by the impeller, casing, air inlet, motor and other parts, No6C and No8~20 in addition to the above structure, as well as the transmission part.
The impeller is composed of 10 blades, a curved wheel cover and a flat rear plate. The utility model has the advantages of high efficiency, stable and reliable operation and good air performance through the static and dynamic balance correction and overspeed operation.
Case - welded with ordinary steel plate into a whole.
The air inlet is made into an integral structure, and is arranged on one side of the fan, and the cross section parallel to the axial direction is a curved shape.
Driven by spindle, bearing box, rolling bearing, pulley or coupling.
Installation and use
Before installation should be ready to install the required materials and tools to conduct a comprehensive inspection of the wind turbine parts, should be especially careful examination of the impeller, casing, shaft and bearings and other parts, such as damage, repair should be found, and then cleaning with kerosene bearing box.
The following three points must be noted in the process of installation:
1, in some joints, in order to prevent rust, reduce the difficulty of disassembly, should be coated with a layer of lubricating oil or machinery
Oil.
2, on the top of the joint bolt, if the positioning pin should be a good pin, and then tighten the bolt.
3, check the chassis and other shell inside, should not fall and left tools or debris.
Installation requirements:
1, the installation of the fan, the weight of the gas pipeline should not be added to the cabinet, according to the drawings to adjust the air inlet and impeller
Axial and radial clearance dimensions, and the horizontal position of the shaft.
2, the installation of air inlet duct, can be directly used by the inlet itself bolt connection, at this time the air inlet
It must be three countersunk screws.
3, the air outlet is installed into a certain angle, after the appropriate rotation of the disk so that the label in the horizontal position, which No8-12
Angle flange should be kept horizontal.
4, the installation of No8-12D type fan, using a micrometer and measuring feeler, coaxial fan shaft and the motor shaft
The degree of parallelism of the two ends of the shaft coupling, the tolerance of the two axis coaxiality is 0.05mm, and the tolerance of the parallelism of the coupling end face is 0.1mm.
5, after the installation of the fan, with the hand to try to dial the rotor, check whether there is too tight or scratch rub phenomenon, wiring is correct,
Other insurance facilities are perfect, the rotation part or in and out of the direction whether the person has left, to ensure the safety of the trial run.
6, after the installation of the motor, the installation of pulley or coupling protective cover, such as the air inlet is not connected to the pipeline, also need to add
Protective net or other safety devices (provided by the user), other parts are installed according to the drawing.
As the fan spindle speed n and the internal rate of N has the following relations:
=
Therefore, when the motor capacity does not change, the spindle speed should not be changed, if the spindle speed increases, the motor has
Risk of being burned.
The power of the motor supplied by the blower means that the power consumption, the mechanical loss and the proper storage
In terms of quantity, not full air outlet power required. If the wind turbine outlet or inlet is not connected to the pipeline or without external resistance and idle, the motor also has the risk of burning. For the sake of safety, the valve should be added in the fan exit or entrance pipeline, will start its operation after the closure, the valve gradually opens slowly, until the prescribed conditions, and pay attention to the current of the motor is exceed the standard.
Maintain
1, regular removal of the fan and gas pipeline dust, dirt and water and other impurities, and prevent rust.
2, the fan must be repaired when the power off, absolutely not allowed in the operation, the switch should be
Custody, in case of power transmission.
3, the thermometer and the sensitivity of the oil should be regularly checked.
4, in addition to the demolition and repair should be replaced after the lubricating oil, but also regular replacement of lubricating oil.
5, should be carefully recorded before and after each maintenance
And the number of raw materials, in order to prevent forgetting
Inside the fan and piping.
6, fan test import and export direction within ten meters to the station.
7, installation, maintenance and commissioning personnel are strictly prohibited presence of onlookers.
Faults and causes
The main fault of fan:
First, the bearing box vibration.
1, the wind shaft and the motor shaft is not concentric, coupling skew.
2, the shell or air inlet and impeller friction.
3, the stiffness of the foundation is not strong enough.
4, impeller rivets loose or wheel deformation.
5, impeller shaft and shaft loose, coupling bolt loosening.
6, shell and bracket, bearing box and bracket, bearing box and seat and other connection bolts loose.
7, fan inlet and outlet pipe installation is bad, produce vibration.
8, rotor imbalance.
In 9, too small, the wind speed is too fast.
Two, bearing temperature rise too high.
1, bearing box vibration.
2, poor quality of lubricating grease, modification or filling too much, containing dust, sand, dirt and other impurities.
3, bearing box cover, seat bolts tight or too small.
4, the shaft and rolling bearing installation skew, before and after the two bearings are not concentric.
5, rolling bearing damage.
Three, motor current is too large and too high temperature rise.
1, when the intake valve or throttle valve is not closed strict.
2, the flow exceeds the specified value or pipe leakage.
3, the fan transport of gas containing viscous substances or temperature is too low, the gas density is too large.
4, the motor input voltage is too low or power single-phase power off.
5, coupling is not correct, too tight or uneven gap.
6, affected by the vibration of the bearing box.
7, by the parallel fan working condition deterioration or failure.
Four, belt slide
Two pulley should be opposite to the groove is not right.
Five, belt beat
Two the pulley is close or the belt is too long.
Ordering instructions
When ordering, the number of the fan, the air volume, the pressure, the outlet angle, the direction of rotation, the type and the speed of the motor must be indicated.