I. Main Uses and Applicable Scope

Mine explosion-proof axial flow main ventilation fans are highly efficient and energy-saving forced mechanical ventilation equipment specially designed for various coal mines, mines, and tunnels, often using an extraction ventilation structure. This series of fans can be designed and manufactured in combination with the ventilation network parameters of large, medium-sized coal mines or mines; the ventilation fan adopts an adjustable installation angle design. In response to changes in the working conditions of the mine ventilation network, the blade installation angle can be adjusted in time, which allows the ventilation fan to always be in high-efficiency and energy-saving operation. And it adopts an integral structure form with the motor and impeller directly connected, eliminating the transmission system, with many advantages such as high efficiency, energy saving, low noise, simple installation and disassembly. This ventilation fan is also suitable for metal mines, chemical mines, and other factories and mines that require the use of forced ventilation.

II. Model and Meaning

The performance curves of the ventilation fans are all obtained through actual simulation experiments on standard pipe networks, and are calculated and drawn under standard conditions of gas temperature t = 20℃, gas density ρ = 1.2kg/m ³ , atmospheric pressure P = 101325Pa.

1. Fan model and representation method

2. Model definition description

Taking FBCDZ№28/2×400 as an example: F—fan; B—explosion-proof; C—extraction type; D—counter-rotating; Z—main ventilation; №28—machine number, represented by the decimeter number of the impeller diameter; 2×400—installed power, 2 means two motors, 400kW power, unit kW.

III. Outline Structure Diagram

FBCDZ (original BDK) series ventilation fan performance parameters and dimensions table

FBCDZ (original BDK) series ventilation fan performance parameters and dimensions table

Note: The parameters in this dimensional drawing are for reference only and are subject to change without notice.

FBCDZ (original BDK) series ventilation fan performance parameters and dimensions table

FBCDZ (original BDK) series ventilation fan performance parameters and dimensions table

Note: The parameters in this dimensional drawing are for reference only and are subject to change without notice.

V. Usage and Maintenance

1. Before starting the fan, it is necessary to check whether there are any foreign objects in the flow passage to prevent the fan impeller from being collided and damaged after starting.

2. Before starting the fan, please read the instruction manuals of the electrical control device, motor, secondary instruments, and fan carefully, and operate the equipment according to the requirements to prevent errors. First, fully open the air valve and start the fan in the order of secondary and then primary levels to ensure normal operation. The general start-up time interval is about 2 minutes. When using variable frequency control for startup, the primary and secondary levels can be started simultaneously.

3. After the fan starts and reaches normal operation, observe whether the operating current of the motor exceeds the rated current of the motor; whether there are any abnormal sounds in the fan flow passage. If problems are found, stop the machine for inspection immediately. After the cause is identified and the fault is eliminated, it can enter normal operation.

4. If the motor has a shutdown heater with a voltage of 220V. If the fan is not used for a long time, the heater should be used to preheat the motor cavity first, and the insulation resistance should meet the requirements before putting it into operation.

5. During the use of the fan, an operation log should be kept to systematically record the operation of the fan, including:

★ The start and stop times of the ventilator, and the reasons for stopping.

★ Ambient temperature, humidity, and atmospheric pressure.

★ Motor operating voltage, operating current, motor bearing temperature, stator temperature.

★ Air pressure and air volume of the fan.

★ Time, quantity, and brand of lubricating grease added to the motor bearings.

★ Regularly check for any abnormalities found during operation.

6. Regularly stop the machine to check whether various components of the ventilator meet the requirements:

★ Check the front and rear bearings of the motor. If problems are found, replace the bearings and lubricating oil according to requirements.

★ Check the impeller part of the ventilator, whether the blades are loose, whether the installation angle of the blades is the same as the setting, and deal with any problems found in time.

★ Check the rivets of the impeller cylinder protective ring every six months for looseness or falling off. If any, notify the manufacturer immediately.

7. During daily operation, it is necessary to frequently check the reliability of the measuring instruments to prevent accidents caused by the failure of thermometers, ammeters, etc.

8. When shutting down for maintenance, if lubricating grease is replaced, the waste grease should be cleaned up, including the waste grease remaining in the oil injection pipe system. If gasoline is used for cleaning, the gasoline should be allowed to evaporate completely before applying new grease. The new grease should be applied to the tracks of the bearing. The first greasing should meet the following requirements: the bearing gap is filled, and the entire bearing chamber is filled to about 75%, and the outer cover cavity is filled to about 30%.

9. The fan is equipped with a lubrication device that allows for lubrication without stopping. Use an oil gun for lubrication. At the start of operation, add 500g of grease every 720 hours; after 2000 hours, add 60g of grease every 1440 hours. If the ambient temperature changes significantly with the seasons, the lubrication time and amount can be divided into two levels according to temperatures ≤25℃ and ≥25℃. When the ambient temperature is high, the lubrication cycle should be shortened accordingly. When lubricating, drain the old grease at the same time. Recommended grease grade: LGWA2, SKF bearing special grease. If there are conflicts between some requirements and the contents of the random instruction manual, the random instruction manual shall prevail.

10. If the fan is shut down for a long time at low temperatures, be sure to check whether the grease has deteriorated before restarting. If the ambient temperature is too low, use a low-temperature resistant grease.

11. Regularly clean dust from the surface of the fan, electrical control system, and secondary instruments.

12. Personnel in the machine room should regularly conduct external inspections of the internal machine operation. If any abnormal sounds, vibrations, or temperature rises are detected, stop the machine immediately and address the issue. Restart only after the fault has been resolved.

VI. Packaging, Transportation, and Storage

1. The fan has been debugged and inspected before leaving the factory and uses simple packaging.

2. Small-sized fans are shipped as complete units, while large-sized fans are shipped in parts, including the main unit diffuser and the diffuser tower. The isolation chamber has undergone rigorous pressure testing. Users should generally not disassemble the isolation chamber from the main unit to avoid damaging the explosion-proof performance of the unit.

3. This series of fans can be transported by rail, road, or water.

4. When the fan is not in use for a long time, it should be placed in a cool, dry, ventilated place free of corrosive gases, and the ambient temperature and relative humidity should meet the technical requirements.

5. The packaging boxes of the motor, fan, and secondary instruments contain product qualification certificates, packing lists, and operation and maintenance instructions. The fan has been inspected and approved before leaving the factory.

The company's main business is the design, research and development, and manufacturing of various ventilators and their supporting products for mines, non-coal mines, and rail transit. Products involve 38 series of fan products, more than 3,000 specifications, including FB(D) series, FBC(D)Z series, FKZ series, rail transit SDS series, tunnel SDF series, etc.; supporting products include shaft, inclined shaft self-resetting explosion-proof doors, louver-type automatic regulating air doors, side-opening (vertical) automatic regulating air doors, butterfly valves, silencers, main ventilator online detection and fault diagnosis systems, non-stop fan reverse systems and intelligent oil injection systems, which can fully meet the ventilation needs of mines and are sold to various domestic fields and international markets such as Russia and Canada.

In recent years, the company has successively won the honorary titles of "Yuncheng Enterprise Technology Center", "Yuncheng Excellent Enterprise", "Yuncheng Intellectual Property Demonstration Enterprise", and "Innovative Small and Medium-sized Enterprise". The company has passed the "ISO9001 Quality Management System Certification", "ISO14001 Environmental Management System Certification", "ISO45001 Occupational Health and Safety Management System Certification", and its products have passed the "China National Compulsory Product Certification". It has also obtained a number of patents. With advanced process equipment, strong technical strength, excellent product quality, and a perfect service system, it has won unanimous recognition and praise from users. In particular, the green, environmentally friendly, and low-noise fans that have been focused on the market in recent years have achieved rapid development, becoming a well-known enterprise in the fan industry with leading technology.