G4-73 centrifugal fan

G4-73 centrifugal fan selection according to the first part of the number of revolutions determined ratio, to select the fan model and determine whether its corresponding point in the high zone, as in the high zone, then according to the corresponding flow coefficient and pressure coefficient to preliminary calculations fan machine number. Here, G4-73 end of the second part of the centrifugal fan selection, check the ratio of the number of revolutions, choose efficient fan model, crude computer number is the key to this section. Effect of G4-73 centrifugal fan selection compressible gas. [1] indicates that: "In the fan, if the flow velocity at any point are less than 100m / s, ie Mach number M <0.3, you can ignore compressibility effects, as incompressible fluid treatment, Ventilator, Since M is generally less than 0.3, so the subsonic low-speed zone. " See from, fans do not consider compressibility can be. But the literature [1] and that "sometimes in order to improve the accuracy of the calculation, the Mach number M> 0.2, you need to consider changes in the density of computing power and other effective correction." Visible if the Mach number M> 0.2 may be considered for amendment G4-73 centrifugal fan performance. When the actual fan calculation process, some big machine number, high speed, high pressure centrifugal fan considering compressibility of gases, such as 9-28№18.5D fan, which reduces the half gauge number, 9-28 №18D can meet the conditions required. But I think the fan actual operation, when the field operating conditions can also be adjusted by adjusting means, and consider changes in compression performance, machine number of fans around is not large, so the impact of the centrifugal fan gas compression can be ignored Excluding. According to the known density, speed, model, and the rough calculation over G4-73 centrifugal fan machine number round, taking advantage of the software point mapping function can express the fans are dimensionless performance curve, while the fan calibration work operating point. There may also be listed dimensional performance table, the location of the operating point calibration. Further according to the actual operating conditions performance is obtained within the power of the fan. Here, G4-73 centrifugal fan selection process completed, calculate the fan shaft power and select the drive means is omitted here. It is worth mentioning that the same conditions the performance of different manufacturers, the results of different techniques may not be the same person elected. This is usually caused by daily selection of experienced technical personnel and decisions based on their own business most of the existing models may elect good fan. The fan bidding, who selected the most fan efficiency, energy saving, simple process and low cost will come exclusive advantages. Structure G4-73 G4-73 centrifugal fan centrifugal fan is mainly composed of impeller, housing, air inlet, adjust the doors and transmission parts. 1, the impeller --12 backward wing blades welded to the cone-shaped chamfered curved front plate and the plate after the plate in the middle. As a result of the wing-shaped leaves, to ensure that the main fan efficiency, low noise, high strength. Impeller static and dynamic balance correction and overdrive test, it is smooth and reliable. The same machine number of pass, the induced draft fan impeller, the same structure, but different materials, general election fan A3, induced draft fan selected 16Mn. 2, the case - by ordinary steel plate welded into a snail shape. Single suction fan casing made of three different forms (№8-12 cabinet made the overall structure, can not open, №14-16 made two open chassis, №18-29.5 cabinet made three open-style). Of the induced draft fan, snail-shaped plate made properly thickened, to prevent wear. 3, air inlet - Convergence, streamlined inlet into the overall structure, bolted to the fan inlet side. 4, adjust the door - a device that regulates the flow, the axial inlet in before installing. Adjustment range from 0 degrees (full) to 90 degrees (fully closed). Adjust the door to move the position: as viewed from the air inlet on the right side of the right-hand fan, move the push from bottom to top is fully closed to fully open direction of L-blower to move on to pull down the whole by closed to fully open direction. 5, the drive - spindle drive section made of high quality steel, this wind turbine are made of rolling bearings. There are two forms bearing box: №8-16 cylinder with integral bearing housing; №18-29.5 two separate pillow bearing housing. Equipped with a thermometer and the bearing housing oil level indicator (cited only fan). Lubricants with 30 machine oil, the amount of fuel oil level labeling requirements. №8-16 overall cartridge bearing box as dry oil, in the ball bearing housing side baffle plate should be added, to have it fixed tank system. Induced draft fan with water cooling device, therefore, be added pipes, water consumption varies with the temperature varies, generally by 0.5-1m3 / h considered. Model gauge total pressure (Pa) Flow (m3 / h) with motor model (KW) single price impeller price G4-73 14D 6541-6272 86586-120740 4-280 5975-4333 131940-166100 4-315 2831-2819 57326-64735 6-75 2789-1883 72534-109970 6-90 1630-1491 43591-66425 8-37 1391-1086 72059-83624 8-45 16D 3709-2465 85571-164150 6-185 2133-1420 65096-124820 8 -75 1343-895 51699-99178 10-45 18D 4518-3126 169910-233730 6-310 4710-4639 121830-154160 6-280 2705-1800 92648-17730 8-132 1702-1133 73610-141210 8-75 20D 5837 -3870 167130-320610 6-380 3347-3211 127080-177230 8-220 3060-2225 193660-243800 8-250 2104-2018 100970-140810 10-110 1924-1400 153860-193700 10-132 22D 6865 233000 650 6865 261000 6806796-6375 7805963-4864 376000-434000 290000-348000 850 Tel: 13806434669,13806436986 Contact: Wang QQ: 475662603 E-mail: hengdingfengji@126.com Fax 0533-6069989 Website: www.fengji.so