purpose
8-09, 9-12 type high pressure centrifugal fan and melt rate as 1, 2, dedicated fan 3, 5, 7t/h cupola supporting, but also can be used as various furnace, forging furnace blast and air transport and non corrosive, non combustion, non sticky material gas, can also be used in other similar properties. But the medium temperature should not exceed 80 degrees, not more than 150mg/m3 dust and hard particles contained in the medium.
Type and structure
1, 8-09, 9-12 type fan for single suction type 8-09 fan, I plant design, machine No. 6.8A, 7.1D, 8D, 8.5D, 9D five, 9-12 fan machine; I plant design, machine No. 6.8A, 7.1A, 7.4D, 7.7A, 8D, 9D six machine no..
2, 8-09, 9-12 fan can be made clockwise or counterclockwise rotation of two types. From one end of the motor face, where the impeller clockwise rotation, the symmetry of the rotating fan, to "Shun", otherwise known as the counter rotating fan, "inverse" means.
3, the outlet position of the fan to the outlet angle of the cabinet, "Shun", "reverse" fan can be made of 0 degrees, 90 degrees, 180 degrees of three angles
4, 8-09, 9-12 fan from the impeller, casing, air inlet, transmission group, seals, base, etc.. For the type 8-09 No. 7.1, 8, 8.5, three for the overall structure of the 9-12 type No. 8, 9, and two kinds of machine 8-09 type No. 9, the local machine assembling structure.
The impeller is designed according to the new high efficiency forward wind turbine theory. After the impeller is formed, the static and dynamic balance is used to correct the overspeed operation.
Housing - 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 spindle is made of high quality steel. For the 8-09 type No. 7.1 and 8 by rolling bearing grease lubrication; for 8-09 type No. 8.5, No. 8, 9 and 9-12 9 by rolling bearing lubricating oil.
Such as the machine number, the above transmission mode, the export angle and the above structure can not meet the production needs of your unit, I have the ability to have the responsibility to re design and manufacture for you until you satisfied.
Performance selection and Application
1, the book performance parameters are listed in the table in the atmospheric temperature t=20, atmospheric pressure Pa=101.3 * 103pa gas density, which is calculated under the condition of =1.2kg/m3. If the use of the above conditions do not meet the requirements, should press type conversion:
(1) change of density, speed n:
(2) changing the rotational speed n, atmospheric pressure Pa, gas temperature:
Type: Q2, P2, N2 refers to the performance of the table full pressure, flow and power.
2, users in the purchase of the fan before the best response to the actual condition of cupola (mainly refers to the pressure coefficient) were determined, and then selected according to the cupola melting rate and required air volume and air pressure, to ensure that the purchase of wind to meet the actual needs.
3, the fan inlet and outlet in the design and installation of valve or gate, you should first close the inlet or outlet valve to start before the start of the normal speed and then gradually open the valve, to adjust the fan performance, we should strictly control the current regulation process, shall not exceed the standard.
4, the outlet of the fan should be set to the outlet of the pressure cylinder that is a square tube. The expansion of taper at 8 degrees - 12 degrees is appropriate, according to the pipeline, pipeline section area and blower outlet section area ratio should be greater than or equal to 2:1.
5, the air transport pipeline should avoid the dead and turn the fan near the exit turn, turn in the diffuser tube after the starting point should be 5 times the pipe diameter, the turning radius is about 3 times the pipe diameter.
6, the bottom and the gas pipeline must not leak, leakage will make the system down, motor overload.
Installation and commissioning
1, before the installation of a comprehensive inspection, with the wind turbine components such as: the work is complete, the direction of rotation of the impeller and the casing are the same, the connection parts is close, impeller, spindle, bearings and other major parts have no injury, whether the flexible transmission group. Problems should be repaired immediately.
2, installation: pay attention to check the chassis, the shell should not fall or left tools or debris, in some combination of surface in order to prevent rust, reduce the difficulty of disassembly, should be coated with grease or oil. The fan and the ground, the wind pipe and import key join fan should be carefully adjusted to fit the nature, shall not be forced to join, more will be allowed to any part of the piping weight fan, and ensure the horizontal position of the shaft.
3, installation requirements:
(1) when the fan is installed, the spindle must be tested to make it conform to 0.20 - 1000mm.
(2) fan impeller inlet seal gap should be strictly controlled, 8-09 No. 7.1, 8 fan clearance is 1 1.5mm, 8-09 No. 8.5, No. 8, 9 and 9 9-12 wind turbine clearance is 1.5 2.0mm.
(3) after installation, try to drive the transmission group, check whether there is too tight or with the fixed part scrape phenomenon, find the wrong place must be adjusted in time.
4, test run:
After the installation of the fan is completed, the test can be carried out before the test is completed.
Before operation, the inlet or outlet gates must be closed, so that the fans can be started under the condition of no load. After the normal speed, if the condition is good, the gate can be opened gradually until the rated condition. In the operation of the process should be strictly controlled current, shall not exceed the standard, after running 20 minutes, check the bearing box temperature rise is normal, that is, the temperature rise shall not exceed room temperature above 40 degrees Celsius, the surface temperature of not more than 70 degrees celsius.
Operation and maintenance
1, before the start of the fan, the following preparations should be carried out:
(1) close the inlet or outlet valve.
(2) check the integrity of each component, the rotating part and the fixed part of the scratch phenomenon.
(3) the outlet direction within 10 meters to the station.
(4) all transmission parts, such as pulley or coupling shall not be exposed, should be covered with protective cover (user owned).
(5) children are prohibited from playing on the scene, no delay, such as: the elderly, the presence of people with disabilities.
2, when the fan start at normal speed, should always check the temperature of the bearing is normal, such as the discovery of fan vibration, impact, bearing temperature rise rapidly, a sudden increase in noise and other anomalies must be an emergency stop.
3, fan maintenance must first stop power, and then construction.
4, regularly check the fan dust, dirt and other impurities, and prevent rust.
5, in addition to the demolition and repair should be replaced by lubricating oil (grease), under normal circumstances can be replaced according to the actual situation of lubricating oil (grease).
Faults and causes
(1) fan vibration:
1, the fan shaft and the motor shaft is not concentric.
2, the shell or air inlet and impeller friction.
3, impeller rivets loose or impeller deformation.
4, impeller shaft hole and shaft with loose.
5, the connection pieces loose.
6, pipe installation bad.
7, leaf ash, dirt or wear serious.
(two) bearing temperature rise too high:
1, bearing box vibration.
2, poor quality oil, deterioration, improper brand, insufficient quantity.
3, bearing box cover, seat bolts tight or too small.
4, before and after the bearing box is not concentric, bearing position tilt, not concentric.
5, rolling bearing damage or shaft bending.
6, the end cover and shaft friction.
(three) the motor current is too high or the temperature is too high:
1, driving, import or export valve is not closed.
2, the actual operating conditions are far more than the selected operating point.
3, the grid voltage is too low or lack of phase operation.
4, affected by the vibration of the bearing box.
5, the medium contains viscous material.
6, medium containing dust and hard particles exceeded.
Single supply range
The whole structure: one fan, one bolt.
Part of the assembly structure: a fan, supporting a motor, a coupling, the anchor bolt.
Ordering instructions
When ordering, the number, speed, air pressure, air volume, outlet angle, direction of rotation, motor type, power, protection grade, installation method, etc..
Fan inlet door shall be selected according to user's requirement, but it must be indicated on the order contract.