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G4-68； Y4-68 boiler centrifugal drum induced draft fan
G4-68 and Y4-68 centrifugal ventilation and induced draft fans are suitable for ventilation and induced draft matching of steam boilers below 230t/h i
Product details
purpose
G4-68，Y4-68Centrifugal ventilation and induced draft fans are suitable for use in thermal power plants230t/hThe ventilation and induced draft matching of the following steam boilers. When there are no other special requirements,G4-68Type 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 efficiency of no less than must be installed85%The dust removal device reduces the dust content of the flue gas entering the fan to improve the service life of the fan.
Both types of fans have the advantages of high efficiency, low noise, and high intensity
form
(1)The ventilation fan and induced draft fan are both made into single suction units, each with its ownNo.8~16common7Individual machine number.
(2)Each type of fan can be made into two types: right rotation or left rotation. When the fan is viewed from one end of the motor and the impeller rotates clockwise, it is called a right cyclone fan“the right side”The counterclockwise rotation of the impeller is called a left cyclone machine“the left side”express.
(3)The outlet position of the fan is represented by the angle of the air outlet of the casing,“the right side” “the left side”Fans can produce salt0°、45°、90°、135°、180°、225°common6From a certain angle.
(4)The transmission mode of the fan isDThe motor is connected to the fan using an elastic coupling for direct transmission.
Structural characteristics
The fan is mainly composed of an impeller, a casing, an air inlet, a regulating door, and a transmission part.
(1)impeller——cause12A rear inclined wing shaped blade is welded between the curved wheel cover and the flat plate disc. Due to the use of wing shaped blades, the high efficiency, low noise, and high strength of the fan are ensured. The impeller runs smoothly after static and dynamic balance correction. The impeller structure of the ventilation and induced draft fans with the same machine number is the same.
(2)Shell——The casing is a snail shaped body welded from ordinary steel plates. The casing of the fan is made into an integral structure. For the induced draft fan, there is a dust cleaning door on the volute plate, and it is appropriately thickened to prevent cigarette ash wear and extend its service life.
(3)Air inlet——The overall structure of the convergent streamline is fixed on the inlet side of the casing with bolts.
(4)damper——A device used to adjust the flow rate of a fan,№8-12.5cause11Composed of petal shaped leaves,№14-16cause13Composed of braided blades, all installed axially in front of the air inlet. Due to the use of an external transmission structure, the rotation is flexible and convenient. The adjustment range is determined by90°(full cut-off)arrive0°(fully open)Adjust the lever position of the door, looking from the direction of the air inlet, on the right side. For the right cyclone machine, pushing the lever from bottom to top is the direction from fully closed to fully open; For the left cyclone machine, pulling the lever from top to bottom is the direction from fully closed to fully open. In order to ensure the normal operation of various parts of the regulating door, it is necessary to lubricate them well. The regulating door of the ventilation fan is lubricated with calcium sodium based grease. For the induced draft fan, due to the high gas temperature, molybdenum disulfide high-temperature lubricant is used(260℃)Lubricating grease can ensure lubrication during high temperature operation.
(5)transmission group——Composed of spindle, bearing box, coupling, etc. The spindle is made of high-quality steel. Adopting a rolling bearing water-cooled integrated bearing box. Therefore, it is necessary to install water pipes, and the water consumption varies depending on the ambient temperature, generally according to0.5~1m3／hconsider. The bearing box is equipped with a thermometer and an oil level indicator. The lubricating oil adopts a full loss system oilL-AN46The requirement for adding fuel level markings to the fuel gauge.
G4-68，Y4-68Centrifugal ventilation and induced draft fans are suitable for use in thermal power plants230t/hThe ventilation and induced draft matching of the following steam boilers. When there are no other special requirements,G4-68Type 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 efficiency of no less than must be installed85%The dust removal device reduces the dust content of the flue gas entering the fan to improve the service life of the fan.
Both types of fans have the advantages of high efficiency, low noise, and high intensity
form
(1)The ventilation fan and induced draft fan are both made into single suction units, each with its ownNo.8~16common7Individual machine number.
(2)Each type of fan can be made into two types: right rotation or left rotation. When the fan is viewed from one end of the motor and the impeller rotates clockwise, it is called a right cyclone fan“the right side”The counterclockwise rotation of the impeller is called a left cyclone machine“the left side”express.
(3)The outlet position of the fan is represented by the angle of the air outlet of the casing,“the right side” “the left side”Fans can produce salt0°、45°、90°、135°、180°、225°common6From a certain angle.
(4)The transmission mode of the fan isDThe motor is connected to the fan using an elastic coupling for direct transmission.
Structural characteristics
The fan is mainly composed of an impeller, a casing, an air inlet, a regulating door, and a transmission part.
(1)impeller——cause12A rear inclined wing shaped blade is welded between the curved wheel cover and the flat plate disc. Due to the use of wing shaped blades, the high efficiency, low noise, and high strength of the fan are ensured. The impeller runs smoothly after static and dynamic balance correction. The impeller structure of the ventilation and induced draft fans with the same machine number is the same.
(2)Shell——The casing is a snail shaped body welded from ordinary steel plates. The casing of the fan is made into an integral structure. For the induced draft fan, there is a dust cleaning door on the volute plate, and it is appropriately thickened to prevent cigarette ash wear and extend its service life.
(3)Air inlet——The overall structure of the convergent streamline is fixed on the inlet side of the casing with bolts.
(4)damper——A device used to adjust the flow rate of a fan,№8-12.5cause11Composed of petal shaped leaves,№14-16cause13Composed of braided blades, all installed axially in front of the air inlet. Due to the use of an external transmission structure, the rotation is flexible and convenient. The adjustment range is determined by90°(full cut-off)arrive0°(fully open)Adjust the lever position of the door, looking from the direction of the air inlet, on the right side. For the right cyclone machine, pushing the lever from bottom to top is the direction from fully closed to fully open; For the left cyclone machine, pulling the lever from top to bottom is the direction from fully closed to fully open. In order to ensure the normal operation of various parts of the regulating door, it is necessary to lubricate them well. The regulating door of the ventilation fan is lubricated with calcium sodium based grease. For the induced draft fan, due to the high gas temperature, molybdenum disulfide high-temperature lubricant is used(260℃)Lubricating grease can ensure lubrication during high temperature operation.
(5)transmission group——Composed of spindle, bearing box, coupling, etc. The spindle is made of high-quality steel. Adopting a rolling bearing water-cooled integrated bearing box. Therefore, it is necessary to install water pipes, and the water consumption varies depending on the ambient temperature, generally according to0.5~1m3／hconsider. The bearing box is equipped with a thermometer and an oil level indicator. The lubricating oil adopts a full loss system oilL-AN46The requirement for adding fuel level markings to the fuel gauge.
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