The Roots blower itself does not have direct explosion-proof function, but its explosion-proof performance can be improved through various measures. The core points are as follows:
1、 Measures to improve explosion-proof performance
Explosion proof motor and electrical configuration
Choose explosion-proof motors that meet national standards as power sources to avoid sparks or high temperatures during motor operation.
Supporting explosion-proof electrical appliances, explosion-proof switches and other accessories to enhance the overall explosion-proof level of the system.
Structural and material optimization
The key components of the equipment are manufactured using explosion-proof materials, such as the contact area between the shaft sleeve and the sealing jacket, which is designed with an arc bottom serrated labyrinth seal to form a dynamic seal and gradually reduce the pressure of the leaking medium.
The lower part of the wall panel is equipped with a sewage outlet, which is connected to the atmosphere to prevent the accumulation of trace leaked gases.
Install an oil seal at the rear of the supporting bearing seat to prevent gas leakage from entering the oil tank and contaminating the lubricating oil.
Sealing system reinforcement
Combination sealing design: The combination of arc bottom serrated labyrinth seal and formed packing seal reduces the pressure of leaked gas through step-by-step pressure reduction.
Dynamic sealing and static sealing coordination: An O-ring is installed between the shaft sleeve and the main shaft to form a static seal, cutting off the path of lubricating oil leakage; The external oil seal of the shaft sleeve is matched with the sealing cover to form a mechanical seal structure.
Adaptability to high-pressure conditions: When the pressure rises to high pressure (>30kPa), a combination of labyrinth seal and mechanical seal is used. The drain hole at the bottom of the wall panel is closed and filled with high-pressure nitrogen gas to form an air seal, preventing medium leakage.
2、 Application scenarios and security requirements
Typical application areas
Transportation and pressurization of flammable and explosive gases in industries such as petroleum, chemical, coal mining, natural gas, pharmaceuticals, metallurgy, etc.
Sewage treatment aeration device: Inject air or oxygen into the sewage to increase the dissolved oxygen content. It is important to note that explosion-proof measures may be required for specific wastewater treatments.
Safety operation standards
Regularly check the sealing of equipment, bearing temperature (≤ 75 ℃), vibration value (≤ 4.5mm/s), and ventilation situation.
Ensure that the equipment is well grounded to prevent static electricity accumulation from causing fires or explosions.
It is strictly prohibited to carry out open flame operations near the fan, and flammable and explosive materials are prohibited from approaching the equipment.
In case of malfunction or abnormality, immediately stop the machine and have it inspected by professional personnel.
3、 Selection and maintenance points
Selection criteria
Choose explosion-proof models based on gas properties, delivery capacity, pressure requirements, and working environment.
Confirm that the equipment meets safety standards and has obtained CCC mandatory certification and explosion-proof qualification certificate.
Maintenance
Regularly clean up accumulated dust and debris, and maintain good ventilation.
Check the wear of seals, bearings, and other components, and replace damaged parts in a timely manner.
Monitor the quality of lubricating oil to prevent oil contamination caused by medium leakage.
