第1个回答 2009-03-10
1, uses:
This fan is equipped with economizer apply (preheater) and Smoke and dust removal device 0.5 ~ 35t / h industrial boiler selection. Where intake is similar to the conditions, performance can also adapt to those selected, with the maximum intake air temperature should not exceed 250 ° C.
Induced draft fan at the former must pretend collection efficiency of not less than 85% of the dust removal device has been lowered into the dust concentration in flue gas blower, not only reduced the environmental pollution caused by smoke and soot reduces the wear and tear on the blower, and therefore enhance fan life.
2, the form of:
1) The fan made of a single inhalation, there is machine No. № 4, № 4.5, № 5, № 5.6, № 6.3, № 7.1, № 8, № 9, № 10, № 11.2, № 12.5, № 14, № 16 13 kinds.
2) The fan can be made clockwise or counterclockwise rotation in two forms, from the Department to face up to fan drive. Such as a clockwise rotation as the impeller fan clockwise to clockwise express; impeller counterclockwise rotation counterclockwise rotation as the fans to express anti-clockwise.
3) the export position of fans to the case of exports, said Kok. Clockwise rotating fan, fan anti-clockwise rotation can be made of 0 °, 45 °, 90 °, 135 °, 180 °, 225 ° angle of the six.
3, structural characteristics:
By the impeller fan, chassis, inlets, transmission group, such as door-conditioning components.
1) Impeller Materials for Q345 (16Mn), the length of phase prior to the bending leaf. After forming the impeller static and dynamic balance correction, so smooth and reliable operation.
2) the case with steel plate welded into a snail shell-shaped overall. There is at snail's on-board cleaning door open. Facilitate the removal of leaves and fouling within the chassis to ensure the smooth impeller and qigong performance.
3) made inlets Convergent streamline the overall structure, using bolts with a fixed plate.
4) Transmission by the spindle, water-cooled bearing box, coupling, etc.; spindle made from high quality steel. The use of rolling bearings, bearing box and there is a whole part of type two forms.
№ 4 ~ № 6.3 using integrated bearing box; № 7.1 ~ № 16 used some type bearing box. Bearing box should be on two pass cooling water. Water consumption due to operating temperature and the ambient temperature varies, generally based on 0.5 ~ 1m3 / h to consider.
Bearing box is equipped with a thermometer and oil level indicator, the bearings inside the lubricating oil system-wide loss-axis with L-AN46, add oil in accordance with the requirements of the oil level mark.
5) regulating the blower door is used to adjust the size of the flow device. Adjustment for the door leaf petal-shaped, axial inlets installed in the front. As a result of the external drive structure, rotational flexibility. Adjustment range from 90 ° (full-closed) to 0 ° (full). Adjustment of the door plate to the location of the direction from the inlets look, at the right side plate of the fan right from the bottom-up push is close to full-direction; left rotating fans, plate from the pull down on the whole are close to wide-open direction. In order to adjust the various parts of the normal work of door must be well lubricated, grease with high temperature (260 °) of expansive soil resin, so that when the fan running at high temperature to maintain lubrication.
4, performance of the selection and application of
1) Design and use of units required based on the volume and total pressure, in terms of performance identified in the selected suction fan of the machine number, specific performance and distribution have to use the motor from the table to choose from, can also choose other types of motors, but the power, Speed should be appropriate, and specify when ordering.
2) the performance table is attached to the performance of table when ordering prevail.
3) fan manufactured goods qualified performance at the rated flow capacity are under the total pressure value does not exceed ± 6%.
4) Performance Table Selection table № 4 ~ 6.3 by the gas temperature t = 220 ° C, 200 ° C, atmospheric pressure Pa = 101325Pa, gas density ρ = 0.713Kg/m3, 0.745Kg/m3 calculation of flue gas medium. № 7.1 gas temperature by more than t = 200 ° C, 175 ° C, atmospheric pressure Pa = 101325Pa, gas density ρ = 0.745Kg/m3, 0.784Kg/m3 calculation of flue gas medium. Fan belt adjusted throttle curve and performance curve selection and performance tables are referring to adjust for the wide-open door leaf (0 ° C) when the parameters.
5) such as fan and conditions of use does not match the given conditions, the performance should be related to the conversion formula