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G4-73； Y4-73 D boiler centrifugal drum induced draft fan
G4-73 and Y4-73 boiler ventilation and induced draft fans are suitable for ventilation and induced draft fan systems of 2-670t/h steam boilers in ther
Product details
purpose
G4-73、Y4-73Boiler ventilation and induced draft fan are suitable for use in thermal power plants2~670t/hThe ventilation and induced draft fan system of steam boilers. When there are no other special requirements,G4-73It can also be used for mine ventilation and general ventilation.
The medium conveyed by the ventilation fan is air, and the maximum temperature shall not exceed80℃The medium conveyed by the induced draft fan is flue gas, and the maximum temperature shall not exceed250℃.
Before the induced draft fan, a dust removal device must be installed to minimize the dust content of the flue gas entering the fan as much as possible. According to the general usage of power plants, the dust removal efficiency shall not be lower than85%.
form
(1)The ventilation fan and induced draft mechanism form a single suction system, each with its own characteristicsNo.8—28common12Individual machine number.
(2)The fan is made in two directions of rotation, left and right. When viewed from one end of the motor and the impeller rotates clockwise, it is called a right cyclone fan“the right side”express; The counterclockwise rotation of the impeller is called a left cyclone“the left side”express.
(3)The outlet position of the fan is represented by the angle of the air outlet of the casing.
(4)The transmission mode of the fan isDAll of them are driven by elastic couplings.
Structural characteristics
The fan is mainly composed of an impeller, a casing, an air inlet, a regulating door, and a transmission part.
(1)impeller——cause12The angled blades of a backward sloping wing are welded between the conical front plate and the flat rear plate. Due to the use of wing shaped blades, the fan ensures high efficiency, low noise, and high strength. The impeller has undergone static and dynamic balance correction, ensuring smooth operation. The impeller structure of the ventilation and induced draft fans with the same machine number is the same.
(2)Shell——It is a snail shaped body welded from ordinary steel plates. The casing of a single suction fan is made in three different forms(No.8-12The casing is made into a complete structure and cannot be disassembled,No.14~1 6The casing is made into two open types,No.18—28The casing is made into a three open type)The induced draft fan and volute plate have been appropriately thickened to prevent wear.
(3)Air inlet——The converging and streamlined air inlet is made into a whole structure and fixed on the inlet side of the fan with bolts.
(4)damper——The device used to adjust the flow rate of the fan is installed axially in front of the air inlet. The adjustment range is determined by0°(Fully open) to90°(full cut-off)Adjust the position of the door lever, looking from the air inlet direction on the right side, and push the lever of the right cyclone machine from bottom to top in the direction from fully closed to fully open; For the left cyclone machine, the direction of pulling the lever from up to down is from fully closed to fully open.
(5)drive——The main shaft of the transmission part is made of high-quality barium, and this fan uses rolling bearings. There are two forms of bearing housingsNo.8—16Using an integral cylindrical bearing box,No.8—28Use two independent pillow type bearing housings. The bearing box is equipped with a thermometer and an oil level indicator(Only induced draft fan)The lubricating oil adopts a full loss system oilL—AN46Add oil according to the requirements of the oil level mark.No.8-16If lubricating grease is used for the integral cylindrical bearing box, an oil baffle should be added on one side of the ball inside the bearing box, and its fixing groove has been prefabricated. The induced draft fan is equipped with a water cooling device, therefore, a water supply pipe needs to be installed. The water consumption varies with the temperature, generally according to0.5~1m3/hconsider.
G4-73、Y4-73Boiler ventilation and induced draft fan are suitable for use in thermal power plants2~670t/hThe ventilation and induced draft fan system of steam boilers. When there are no other special requirements,G4-73It can also be used for mine ventilation and general ventilation.
The medium conveyed by the ventilation fan is air, and the maximum temperature shall not exceed80℃The medium conveyed by the induced draft fan is flue gas, and the maximum temperature shall not exceed250℃.
Before the induced draft fan, a dust removal device must be installed to minimize the dust content of the flue gas entering the fan as much as possible. According to the general usage of power plants, the dust removal efficiency shall not be lower than85%.
form
(1)The ventilation fan and induced draft mechanism form a single suction system, each with its own characteristicsNo.8—28common12Individual machine number.
(2)The fan is made in two directions of rotation, left and right. When viewed from one end of the motor and the impeller rotates clockwise, it is called a right cyclone fan“the right side”express; The counterclockwise rotation of the impeller is called a left cyclone“the left side”express.
(3)The outlet position of the fan is represented by the angle of the air outlet of the casing.
(4)The transmission mode of the fan isDAll of them are driven by elastic couplings.
Structural characteristics
The fan is mainly composed of an impeller, a casing, an air inlet, a regulating door, and a transmission part.
(1)impeller——cause12The angled blades of a backward sloping wing are welded between the conical front plate and the flat rear plate. Due to the use of wing shaped blades, the fan ensures high efficiency, low noise, and high strength. The impeller has undergone static and dynamic balance correction, ensuring smooth operation. The impeller structure of the ventilation and induced draft fans with the same machine number is the same.
(2)Shell——It is a snail shaped body welded from ordinary steel plates. The casing of a single suction fan is made in three different forms(No.8-12The casing is made into a complete structure and cannot be disassembled,No.14~1 6The casing is made into two open types,No.18—28The casing is made into a three open type)The induced draft fan and volute plate have been appropriately thickened to prevent wear.
(3)Air inlet——The converging and streamlined air inlet is made into a whole structure and fixed on the inlet side of the fan with bolts.
(4)damper——The device used to adjust the flow rate of the fan is installed axially in front of the air inlet. The adjustment range is determined by0°(Fully open) to90°(full cut-off)Adjust the position of the door lever, looking from the air inlet direction on the right side, and push the lever of the right cyclone machine from bottom to top in the direction from fully closed to fully open; For the left cyclone machine, the direction of pulling the lever from up to down is from fully closed to fully open.
(5)drive——The main shaft of the transmission part is made of high-quality barium, and this fan uses rolling bearings. There are two forms of bearing housingsNo.8—16Using an integral cylindrical bearing box,No.8—28Use two independent pillow type bearing housings. The bearing box is equipped with a thermometer and an oil level indicator(Only induced draft fan)The lubricating oil adopts a full loss system oilL—AN46Add oil according to the requirements of the oil level mark.No.8-16If lubricating grease is used for the integral cylindrical bearing box, an oil baffle should be added on one side of the ball inside the bearing box, and its fixing groove has been prefabricated. The induced draft fan is equipped with a water cooling device, therefore, a water supply pipe needs to be installed. The water consumption varies with the temperature, generally according to0.5~1m3/hconsider.
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