Use of fan
The G4-73 and Y4-73 type boiler pass and draft fan are suitable for use in the 2-670 / t steam boiler in the thermal power plant. In the absence of other special requirements, G4-73 can also be used for mine ventilation and general ventilation. The medium of the fan is air. The maximum temperature shall not exceed 80 DEG C: the medium of the induced draft fan is the flue gas, and the maximum temperature shall not exceed the temperature of 250 DEG C. The dust removal device must be installed before the draft fan to ensure that the dust in the flue gas entering the fan is less. According to the general use of power plants, dust removal efficiency shall not be less than 85%. The type of fan 1 fan into the wind mechanism into a single suction machine No. No8-29.5 each of the 13 machines. 2, each fan can be made into left or right rotation of two forms. From one end of the motor face, according to the clockwise rotation of the impeller, known as the right rotating fan, to the "right" means, such as the impeller rotating counterclockwise, known as the left rotating fan, to "left". .3, the outlet position of the fan, the outlet angle of the cabinet, see the installation diagram. 4, fan transmission is D type, the motor and the fan are connected with the use of elastic coupling direct drive. 5, the product name is as follows: G4-73-11No18D right 90 degrees. Y4-73-11No.18D G.Y said: the left 0 degree fan and boiler pressure ventilation respectively, apply the highest efficiency point is 0.437, 10 times of the whole (4), compared with the traditional number 73, 11 said that the first single suction design, no.18 impeller diameter 1800mm. The main structure of fan is composed of impeller, casing, air inlet, adjusting door and transmission parts. 1, impeller blades by 12 wing beveled cone arc welded to the front plate to plate after plate. Due to the adoption of the wing shaped blade, the utility model has the advantages of high efficiency, low noise and high intensity of the fan, and at the same time, the impeller is adjusted dynamically and statically. The fan wheel structure of the same machine number is identical with that of the draught fan. 2, the shell: the shell is welded with steel plate into the cochlea. A single suction fan into three different forms: No..8-12 chassis made the overall structure, not on the open, no.14-17 case into two open, no.18-29.5 case into three open, to lead the volute plate fan, made the appropriate thickening to prevent grinding. 3, the air inlet: the wind inlet of the wind turbine is made into an integral structure and is fixed on the inlet side of the fan by bolts. 4, adjust the door: used to adjust the flow of the fan device, axial installed in front of the air inlet. Adjustment range from 90 degrees (full closed) to 0 degrees (fully open). Adjustment of the door plate to the location, from the air inlet direction, on the right, a right rotary fan, pull from down to up by close to full direction, a left rotating, pull down by the pull is close to full direction. In order to adjust the normal work of each department, must be very good lubrication. To regulate the fan door, the use of calcium sodium grease lubrication. For the induced draft fan, due to the high temperature of the gas, the grease is made up of three Mo Mo high temperature (260 DEG C) grease. No more than.16 fan with the dry oil plug office. 5, the transmission part: the transmission part is mainly made of high quality steel, the fans are using rolling bearing. The bearing box has two forms: No..8-16 with cylinder type bearing box, two independent pillow bearing box with no.18-29.5, the bearing box is equipped with a thermometer and level indicator. Only the fan lubricating oil is made up of No. 30 mechanical oil. No..8-16 integrated cylinder type bearing box such as the use of our oil, should add oil retaining plate on one side of the ball bearing box, the fixed slot has been made, fan reservoir water cooling device, therefore, require the installation of water pipes, water consumption increased as the temperature varies, generally considered as O.5-1m3//h.