Fan of an electrolytic aluminum production line9-19 -9-26

Use
9-19, 9-26 type high pressure centrifugal fan, generally used for forging furnace and high-pressure forced ventilation, can be widely used for conveying materials, air and non corrosive, non combustion, explosive, easy to volatile gas does not contain viscous substances. Medium temperature is generally not more than 50 degrees Celsius (up to no more than 80 degrees Celsius), the dust and hard particles in the media content is not greater than 150mg/m3.
Type
The fan of the single suction, there is usually no 4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2, 12.5, 13, 14, 16 A total of 14 machine no..
The fan is usually made of two types of right and left, from one end of the motor face, the clockwise rotation of the impeller, said the right cyclone, to "right", said the counter clockwise rotation of the left cyclone, to "left".
The outlet position of the fan is expressed as the outlet angle of the casing. "Left" and "right" can be made into 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, a total of six angles.
The transmission mode of fan is divided into A type (No. 4 ~ 6.3 D), and C (No. 7.1 - 16) three.
When the machine number, the direction of rotation, the wind angle and transmission mode can not meet your needs, we have the ability to order your design, until you are satisfied.
Structure
No. 4 ~ 6.3 by the impeller, casing, air inlet, a support frame; no 7.1 ~ 16 by the impeller, casing, air inlet, transmission group etc..
Impeller - 9-19 fan blades for 12, 9-26 fan blades for the 16, are the former bend. The outer circumference of the impeller diffuser is higher than 140m/s. After the formation of the impeller static and dynamic balance correction and overspeed operation, it is stable and reliable operation.
Case - welded with ordinary steel plate into a whole.
The air inlet is made into a convergent streamline integral structure, and is fixed on the front cover plate by bolts.
Transmission group - composed of spindle, bearing box, coupling, etc.. The main shaft is made of high quality steel, the overall structure of the bearing box, the use of rolling bearings, bearing grease lubrication.
Installation and use
Before the installation of a comprehensive inspection with the wind turbine components, work is complete, the direction of rotation of the impeller and the casing are the same, the connection is close, impeller, shaft, bearings and other major parts have no injury, whether the flexible transmission group.
Installation: pay attention to check the chassis, the shell should not fall into or left of the tools or debris, in some combination of surface in order to prevent rust, reduce the difficulty of disassembly, should be coated with a layer of grease or mechanical oil. The fan and the foundation with surface and fan and inlet and outlet pipeline connecting surface were carefully adjusted to fit the nature, shall not be forced to join, more will be allowed to add the weight of pipes to the wind turbine components, and ensure the fan in the horizontal position.
Installation requirements:
(1) to install the position and dimensions shown in the drawing, in order to ensure the high efficiency, in particular, to ensure that the air inlet and impeller axial and radial gap size.
(2) after installation, try to drive the transmission group to check whether it is too tight or with the fixed part of the phenomenon such as rub.
(3) after the installation is completed, the trial operation of the fan can be carried out after the total inspection is qualified.
In order to prevent motor overload burned in when a fan must in no load (inlet valve closed, outlet valve slightly open) of cases, such as in good condition, and then gradually open the valve, until a predetermined condition. In the operation of the process should be strictly controlled, shall not exceed.
Fan operation:
Prior to the start of the fan, the following preparations shall be carried out:
A, the intake valve is closed, the outlet valve slightly open.
B, "point car" to view the fan and its system has no noise, smell, vibration, if there should be excluded,
If not, the point of the car gradually extended until the normal operation.
C, fan start to achieve normal speed, should be in the running process often check the bearing temperature
Normally, when the bearing temperature has no special requirements, the bearing temperature rise shall not exceed the ambient temperature of 40 DEG C; bearing part of the root mean square vibration velocity value shall not be greater than 6.3m/s. If the fan is found to have violent vibration, impact, bearing temperature rise rapidly, and so on, it must be emergency stop.
Maintain
Fan and its system is not allowed to run sick.
The fan should be kept by hand and used by others.
Regularly remove dust, dirt and other impurities inside the fan, and prevent rust.
The maintenance of the fan must be carried out when the power is cut off.
Fan maintenance, test ban children and unrelated personnel and the presence of the presence of the crowd.
The fan test station, in the fan direction within ten meters to import and export.
Before and after the wind machine maintenance shall be counted tools and other products, to prevent the left in the fan and the internal pipeline.
In addition to the time it should be changed after the lubricant, under normal circumstances, according to the actual situation of the replacement of lubricants.
Faults and causes
1, fan violent vibration
The fan shaft is not concentric with the motor shaft;
Casing and impeller or air inlet and impeller friction;
The stiffness of the foundation is not strong enough;
Impeller rivet loose or impeller deformation;
Impeller shaft hole and shaft loose;
The casing and the bearing seat and the bracket, the bearing seat and the bearing cap bolt loosening;
The inlet and outlet pipe installation, bad fan, resonance;
The leaves are dust, dirt, blade wear, impeller, shaft bending deformation due to rotor imbalance.
2, bearing temperature rise too high
Bearing box vibration;
The quality of the lubricant is bad, bad or contains impurities such as dust, sand, dirt and so on;
The clamping force of the bearing box cover and the connecting bolt is too large or too small;
4.