YAHDG3 series centrifugal fan is a high-efficiency, large-flow, low-noise centrifugal fan. The fan adopts advanced gas-solid two-phase flow theory, impeller designed with fluid mechanics theory, logarithmic spiral casing, adjustable speed motor and control system. Cone-shaped air inlet and other components. It has novel structure, small vibration, large air volume, high pressure, low noise and high efficiency. 1 Purpose: As the indoor ventilation of general factories and buildings. It can be used as input gas or output gas. The conveying gas types are air and other gases that are not spontaneously combustible, harmless to the human body, and non-corrosive to copper and iron materials. No sticky substances are allowed in the gas, the dust and hard particles contained are not more than 150mg/m3, and the temperature of the gas must not exceed 80°C.
Forms: There are three main installation forms of the YAHDG3 centrifugal fan, type A, type C, and type D. Among them, Type A is direct motor connection, and the temperature of the conveyed medium can reach up to 180C; Type C is belt drive, and the temperature of the conveyed medium can reach up to 800C; Type D is coupling drive and cantilever installation.
This series of fans can now be made into two types of right-handed fans and left-handed fans. When viewed from one end of the motor, the impeller rotates in a clockwise direction, which is called a right-handed fan. It is represented by "right" and rotates counterclockwise, which is called a left-handed fan. Fan, indicated by "left".
The outlet position of the fan, expressed by the angle of the air outlet of the casing, can be made into three kinds of activities: 0°, 90°, and 180°, which can be adjusted. If there is a special angle, it must be noted when ordering.
Structural features: YAHDG3 centrifugal fan is mainly composed of impeller, casing, air inlet, motor and motor base. Models above No. 7 have transmission parts in addition to the above parts.
1) The impeller is made of 16 arc thin plate blades, curved front disc and flat back disc welded together. It is made of steel plate or stainless steel, and has undergone static and dynamic balance correction. It has good air performance, high efficiency and low noise. The vibration is small and the operation is stable.
2) The casing is welded by steel plates, and the whole adopts a welded structure, which is easy to install. At the same time, the casing is interchangeable for easy installation and use. No2.8~No.12 housings are made as a whole and cannot be disassembled; No13~No.15 housings are made up and down, divided into two halves along the horizontal plane of the center, and connected by bolts.
3) The air inlet is installed at the front side plate of the fan, and the section parallel to the main shaft is a streamlined section, which can make the air flow smoothly into the impeller with minimal loss.
4) The stator of the motor is fixed and the impeller is installed on the main shaft extending from the rotor. The rotor of the motor rotates to drive the impeller installed on the main shaft to rotate. The soft start method can be used when the motor is started to evenly adjust the fan speed to meet the changing requirements of the system load.
5) The transmission part is composed of the main shaft, bearing box, rolling bearing, pulley, etc. The main shaft is made of high-quality steel quenched and tempered, and the bearing box adopts rolling bearings. Products from NSK, SKF and other companies can be selected according to needs, and the new structure of the shaft end seal is adopted. , To ensure that the lubricating oil does not leak and keep the operating environment clean. .
6) Protection. The exposed rotating part of the ventilator is covered with a protective cover to play a protective role. All C-type and D-type fans have belt covers outside the pulleys for protection. Observation windows and heat dissipation holes are reserved on the belt covers to facilitate belt heat dissipation. At the same time, the observation windows are convenient for observing the rotation direction of the fan.
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