Standard for performance determination of main ventilators in coal mines

Standard for performance determination of main ventilators in coal mines: All test instruments and equipment shall meet the requirements of this standard.

Relevant certificates of main ventilators and accessories should be complete, such as safety sign license, explosion-proof certificate, friction spark safety inspection certificate, flame retardant and antistatic inspection report of polymer products, etc. Due to the different structure, purchase or service life, the relevant certificates of main ventilators will be different, but they should comply with the relevant regulations of the state. On-site inspection of fan parts should be complete, fasteners at all connection parts of main fan should be firm, and braking device should be flexible and reliable.

The lubrication system should work normally, the shell or internal structure of the main ventilator should not be deformed or damaged abnormally, and the nameplate, steering sign and airflow sign of the main ventilator should be complete. The running power of the motor of the main ventilator should not exceed the rated power, and the protection and related facilities of the main ventilator system should be fully produced and should comply with the provisions of the Coal Mine Safety Regulations.

Working principle of ventilator

The working principle of ventilator is basically the same as that of turbocompressor, except that the gas velocity is low and the pressure changes little, so it is generally unnecessary to consider the change of gas specific volume, that is, treat gas as incompressible fluid. Fan is the customary abbreviation of gas compression and gas conveying machinery in China. Usually, fans include ventilators, blowers, compressors and Roots blowers, but do not include positive displacement blowers and compressors, such as piston compressors.

Fan is a product type of fan, but people usually call it a cylindrical fan, which is another name of fan. The performance parameters of ventilator mainly include flow, pressure, power, efficiency and speed. In addition, noise and vibration are also the main technical indicators of the ventilator.