XQItypeXQIIIntroduction to High Pressure Centrifugal Ventilation Fan with Type Slant Slot

1、 Overview
XQType IXQType II high-pressure centrifugal fan is a skewed fan designed specifically for cement kiln systems. This fan can also be used as a blower for various iron furnaces, melting furnaces, and forging furnaces, and is also suitable for conveying air and gases that are non corrosive, unnatural, and do not contain viscous substances. The temperature of the conveying medium shall not exceed80℃, the dust and hard particles contained in the medium shall not exceed150mg/m3.

2、 Type
This type of fan hasXQⅠ№4.8A、XQⅠ№5.4A、XQⅡ№4.7AThere are a total of three machine numbers.
The wind mechanism is single suction, with two types of rotation: clockwise rotation and counterclockwise rotation. From one end of the motor, when the impeller rotates clockwise, it is called a clockwise rotating fan, represented by "clockwise". When the impeller rotates counterclockwise, it is called a counterclockwise rotating fan, represented by "counterclockwise". The outlet position of the fan is represented by the angle of the casing outlet, and both "forward" and "reverse" fans can be made0°45°90°135° 180Five angles.
The transmission mode of this type of fan isADirect coupled transmission of electric motors.
3、 Structural characteristics
XQType IXQThe Type II fan is mainly composed of components such as the casing group, impeller group, air inlet group, front cover plate group, machine base, and electric motor.
1Shell assembly: Welded into a snail shaped shell using ordinary carbon structural steel.
2Impeller group: The blades are forward curved blades, and after the impeller is formed, it undergoes static and dynamic balance correction, so it runs smoothly and reliably.
3Air inlet: Made of ordinary carbon structural steel into a convergent streamlined overall structure with good flow performance.
4、 Performance and Selection
The performance of a fan generally refers to its ability to transport gas under standard conditions.XQType IXQThe performance parameters in the Type II fan performance table are based on temperaturet=20℃, atmospheric pressureP=101300Pa, air density ρ=1.2kg/m3Calculated in a state. If the usage conditions do not meet the above conditions, the performance parameters should be calculated according to the relevant formulas.
5、 Installation and Debugging
1. Before installation, a comprehensive inspection of all components of the fan should be carried out to ensure that the parts are complete, the connections between each part are tight, the rotation direction of the impeller and the casing is consistent, the main parts are not damaged, and the transmission is flexible. If any problems are found, they should be repaired and adjusted immediately.
2. During installation, pay attention to checking that there are no tools or debris that have fallen or been left inside the casing. On some joint surfaces, in order to prevent rust and reduce disassembly difficulties, some lubricating grease or mechanical oil should be applied. The joint surface between the fan base and the foundation, as well as the connection of the inlet and outlet pipes, should be adjusted to fit naturally. Forced connection is not allowed, and the weight of the pipes should not be added to the various components of the fan. Attention should be paid to ensuring the horizontal position of the fan.3. After installing the fan, try to move the impeller by hand or lever to check for any tightness or collision with the fixed parts. If any tightness or collision is found, it must be adjusted properly.

4. Trial operation of the fan
After all installations are completed and the overall inspection is qualified, the fan test run can be carried out. In order to prevent the motor from burning out due to overload, the fan must be started and tested under no-load conditions (with the inlet valve closed and the outlet valve slightly open). If the situation is good, gradually open the valve until the specified working conditions are met. If no abnormal phenomena occur, it can be officially used.

The power selected for the ventilation fan refers to the specific operating conditions, such as mechanical losses and the required reserve capacity. Strictly control the current during operation and do not exceed the rated value of the motor, otherwise it may burn out the motor.

6、 Maintenance and upkeep of fans
In order to avoid human malfunctions caused by improper maintenance, prevent natural failures of fans and motors, ensure the normal operation of fans, fully utilize equipment efficiency, and extend the service life of fans, it is necessary to strengthen the maintenance of fans.

1. Precautions for maintenance work
(1)Only when the fan equipment is completely normal can it operate.
(2)If the fan equipment is started after maintenance, attention should be paid to whether all parts of the fan are normal.
(3)Regularly remove dust, dirt, and other impurities inside the fan and gas delivery pipeline, and prevent rusting.

(4)To ensure personal safety, maintenance of the fan must be carried out while parked.

2. Precautions for normal operation of the fan
(1)If any abnormal phenomenon is found during the driving, parking or operation of the fan, it should be checked immediately.

(2)For minor faults discovered during inspection, the cause should be promptly identified and efforts should be made to eliminate or handle them. If minor faults cannot be eliminated or major faults are discovered, the vehicle should be stopped immediately for maintenance.

7、 Main faults and causes of the fan

1. The fan vibrates violently
(1)Friction between the casing or air inlet and the impeller;
(2)The stiffness of the machine base is insufficient or not firm enough;
(3)Loose rivets on the impeller or deformation of the shaft disc;
(4)Loose fit between impeller shaft disc hole and shaft;
(5)Loose connection bolts between the casing and the machine base;
(6)Poor installation of fan inlet and outlet pipelines, resulting in resonance;
(7)Blade wear, dust and dirt accumulation on the blades, and shaft bending cause rotor imbalance.

2. Excessive motor current and high temperature rise
(1)When driving, the valve in the intake pipe was not tightly closed, resulting in a load start;
(2)The flow rate exceeds the specified value, or the air duct leaks;
(3)The gas density input by the fan is too high or the temperature is too low, resulting in excessive pressure;
(4)The input voltage of the motor is too low or there is a single-phase power outage;

8、 Ordering Notice
When placing an order, the model, machine number, speed, flow rate, pressure, outlet angle, rotation direction, motor model, and power of the fan must be specified.
The inlet regulating door of the fan can be optionally selected according to the actual needs of the user, but it must be specified in the purchase contract

9、 Fan Performance Table

10、 Appearance and installation dimensions