Detailed introduction:

1、 Purpose and standards

10-18 high-pressure centrifugal fan is suitable for production process equipment, iron furnaces, combustion furnaces, and positive pressure in small and medium-sized fertilizer plants

The forced ventilation of fuel boilers can be widely used for material and grain transportation. Transporting air is a non corrosive, non self igniting, and non viscous gas. Unless otherwise specified, the temperature of the medium generally does not exceed 80 ℃, and the dust content of the medium does not exceed 150 mg/m3.

This fan complies with the standard GB/T13275-91 "Technical Conditions for General Purpose Centrifugal Ventilators".

2、 Structural type

The fan is of single suction or double suction type, with a total of 17 machine numbers in the series. The ventilation fan can be made in two types: right-handed and left-handed.

Looking from one end of the motor, if the impeller rotates clockwise, it is called a clockwise cyclone machine, represented by 'clockwise', and counterclockwise, it is called a counterclockwise cyclone machine

'Reverse' represents.

The position of the air outlet of the fan is represented by the angle of the air outlet of the casing, and both 'left' and 'right' can be made at 0 °, 45 °, 90 °, 135 °

There are a total of 6 angles, 180 ° and 225 °. The transmission modes of the fan are A type, D type, and F type.

№ 4~6.3 is mainly composed of impeller, casing, air inlet, bracket, etc., while № 7.1~25 is mainly composed of impeller, casing, air inlet, etc

Composed of mouth, transmission group, etc.

⑴ Impeller: The 10-18 type fan has 6 long blades and 6 short blades. After the impeller is formed, it undergoes dynamic balance correction, resulting in smooth and reliable operation with a long service life.

⑵ Shell: Welded into a snail shell shaped integral structure with ordinary steel plates.

⑶ Air inlet: Made into a convergent streamlined overall structure, fixed to the front cover plate group with bolts.

⑷ Transmission group: composed of main shaft, bearing box, coupling, etc. The main shaft is made of high-quality steel, and the bearing box adopts an integral structure.

The D type bearing box is equipped with an oil level indicator from July 1st to 16th. The lubricating oil used is No. 30 mechanical oil, and the amount of oil added is according to the oil level mark

The requirement of ambition. Type 18~25: F is a double supported two bearing box, using rolling bearings and lubricated with bearing grease.

3、 Performance and Selection

The performance of a fan generally refers to its ability to transport gas under standard conditions. Standard atmospheric pressure pa=101325Pa, gas

Temperature t=20 ℃, relative humidity 50%, air density ρ=1.2 kg/m3.

When the usage state is non-standard, the performance of the non-standard state must be converted to the performance of the standard state, and then the fan should be selected based on the converted performance.

4、 Installation and use of fans
1. Before installation: A comprehensive inspection of all components of the fan should be conducted. Whether the components are complete, whether the rotation direction of the impeller and the casing is consistent, whether the connections of each part are tight, whether the main components such as the impeller, main shaft, and bearings are damaged, and whether the transmission group is flexible. If any problems are found, they should be repaired and adjusted immediately.
2. During installation: Pay attention to checking the casing and strictly prohibit debris and tools from falling or leaving inside the casing. On some bonding surfaces, in order to prevent

To prevent rust and reduce disassembly difficulties, a layer of lubricating grease or mechanical oil should be applied. The joint surface between the fan and the foundation, and the connection of the inlet and outlet air ducts should be naturally aligned, and forced connection is not allowed. It is also not allowed to add the weight of the ducts to the various components of the fan, and attention should be paid to ensuring that the fan is in a stable horizontal position.
3. Installation requirements
After installation, try pulling out the transmission group and check for any tightness or collision with the fixed parts.
(2) After installing the motor, a coupling guard (to be provided by the user) should be installed; If the intake pipe is not connected to the intake port, a protective net (to be provided by the user) should also be added.

.1.

After all installations are completed and the overall inspection is qualified, the fan can be put into trial operation.

4. Trial operation of the fan
To prevent motor overload and burnout, it is necessary to start the fan with no load (close the inlet valve and slightly open the outlet valve). If the operation is good, gradually open the valve until the specified working conditions are met. Strictly control the current during operation and do not exceed the rated value of the motor.

The continuous operation time under rated working conditions shall not be less than 30 minutes for repair, installation, and trial operation, and for newly installed fans

Run for no less than 2 hours.

5. Operation of the fan
Before starting the fan, the following preparations should be made:
a. Close the inlet valve and slightly open the outlet valve.
b. Check the clearance dimensions of each part of the fan, and whether there is any collision or friction between the rotating and fixed parts.
When the fan starts and reaches normal speed, the bearing temperature should be checked regularly during operation to ensure it is normal

When there are no special requirements, the temperature rise of the bearing shall not exceed 40 ℃ of the ambient temperature; Root mean square vibration velocity value of bearing parts

Not exceeding 6.3mm/s. If abnormal phenomena such as severe vibration, impact, and rapid increase in bearing temperature are found in the fan, it is necessary to

Emergency stop.
fiveMaintenance of fans
Precautions for fan maintenance work:
1. Only operate when the fan equipment is completely normal.
2. When the fan equipment is started after maintenance, attention should be paid to whether all parts of the fan are normal.
3. Regularly remove impurities such as dust and dirt inside the fan, and prevent rusting.
4. To ensure personal safety, maintenance of the fan must be carried out while parked.
Precautions for normal operation of the secondary fan
1. If any abnormal phenomenon is found during the driving, parking or operation of the fan, it should be checked immediately. If it is a minor fault, it should be checked immediately

We should promptly identify the cause and try to eliminate it. If a major malfunction is found, the vehicle should be stopped immediately for maintenance.
2. Except for replacing lubricants after each maintenance, lubricants should be replaced or supplemented according to the actual situation under normal circumstances.

sixMain 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 foundation is insufficient or not firm enough.
③ Loose rivets on the impeller or deformation of the impeller.
④ The impeller shaft disc hole and shaft fit are loose.
⑤ Loose connecting bolts between the casing, bearing seat and bracket, and bearing seat and bearing cover.
⑥ Poor installation of the inlet and outlet pipes of the fan leads to resonance.
⑦ There is dust, dirt, and wear on the blades, and the blades are deformed and the shaft is bent, causing the rotor to become unbalanced.
⑧ The fan shaft and motor shaft are not parallel, and the two couplings are misaligned or have no gap.
2. The temperature rise of the bearing is too high
① The bearing box vibrates violently.
② Poor quality, deterioration, insufficient filling, or impurities such as dust, sand, dirt, etc. of lubricants.
③ The tightening force of the connecting bolts between the bearing box cover and seat is too high or too low.
④ The installation of the shaft and rolling bearings is skewed, and the front and rear bearings are not concentric. .2.
⑤ Damaged rolling bearings or bent shafts.
3. Excessive motor current and high temperature rise
① The intake and exhaust pipeline gates were not closed while driving.
② The input voltage of the motor is too low or there is a single-phase power outage.
③ Affected by severe vibration of the bearing box.

④ The spindle speed exceeds the rated value.
sevenOrdering Notice
The scope of supply for a complete set of single machines is: one fan; One matching electric motor; Anchor bolts: Type A transmission 1 pair, Type D

12 sets of transmission, 12 sets of F-type transmission; D. A set of F-type transmission couplings.

When placing an order, it is necessary to specify the fan's machine number, speed, flow rate, total pressure, outlet angle and rotation direction, transmission method, etc

Motor model and power.

8、 10-18 type high-pressure centrifugal tubeFan appearance and installation dimension diagram

Performance and Parts Selection Table of 10-18 High Pressure Centrifugal Fan (Continued 1)

Performance and Parts Selection Table of 10-18 High Pressure Centrifugal Fan (Continued 2)

Performance and Parts Selection Table of 10-18 High Pressure Centrifugal Fan (Continued 3)