What are the forms of the front disk of the centrifugal fan impeller? What are the characteristics of each?
The test method of impeller blade l 61 "test, it makes up for the vortex fluid equipment of high speed wind tunnel will not work under pressure generation and reaction - vacuum, analyze the influence of eddy current detection, point source, surface, direction, flow pattern and conventional fluid disturbance: electromagnetic traction performance improvement of motor armature up to 360 degrees, eccentric magnetic traction
A steel joint survey, the average efficiency of ventilators only about 40%. The maximum operating efficiency of a boiler drum blower in a power plant is only 67.5%, with a minimum of 45.2%. LYJN (61 energy-saving) fan (formerly called "LiSi" fan) can be traced back to 1992. It was successfully manufactured in 2002 and marketed in 2004. The main features are: l for the design of non dimensional radial fan theory were corrected by other advanced hydrodynamic theory, high speed high pressure impeller trimming, become out of high efficiency impeller streamlined, wide and smooth, we call the "61 fan impeller theory";
In 50s of last century, our country took the Western technology as the model, imitated and tried to produce the first generation fan. It was improved in 70s, and now it uses the meridian design theory, the dynamic balance and the wind tunnel to carry on the inspection. In theory, the efficiency can reach about 70%, the highest 86%, but in fact, the efficiency of production can reach 50~70% in general. According to the survey of 148 main ventilators by a coal company, the operation efficiency is above 70%, accounting for about 10%. The operating efficiency is less than 55%, accounting for 59%.
