Inverted umbrella aerators I. Introduction inverted umbrella-type surface aerator is a new sewage treatment equipment, plug-flow ability, high oxygenation capacity, large mixing effect, is widely used in petroleum, chemical, printing and dyeing, tanning , industrial wastewater and municipal sewage treatment pharmaceutical, paper, food, gas and other industries. The device is not only suitable for activated sludge wastewater aeration, also applies to rivers and lagoons aeration, especially suitable for use (multiple parallel oxidation ditch) in the Carrousel oxidation ditch. Second, the principle of sewage in advance of the impeller rotation, since the impeller thrown edge, forming water curtain, wrapped into a lot of air; impeller by the expanding cone was up, up and down the circular flow of sewage, sewage mixing, liquid constantly being updated; impeller bottom and the back flow of water due to a negative pressure of the intake air, so water can be mixed with a large area of ??air, oxygen dissolved in water quickly, the complete oxygenation of sewage purification effect until then. At the same time, a strong impetus to drive a lot of water flow, enabling plug-flow effect. Third, the structural characteristics of inverted umbrella-type surface aerator mainly consists of motor, gear box, lubrication systems, lifting platforms, inverted umbrellas, umbrella down part of the impeller, electronic control systems and other components. Machine for the vertical structure, small footprint, less susceptible to erosion by water splashing. 1. Motor:? Y series three-phase asynchronous motors, outdoor type, high efficiency, low noise, vertical moisture structure, mounted on top of the gearbox, the higher the position, less susceptible to erosion splash sewage and waste. Meanwhile, in order to achieve optimal oxygenation power efficiency, can be equipped with variable frequency inverter device, and automatically controlled by computers. ? 2. Gear: Vertical structure, three helical gear. After the high-quality heat-treated gears grinding forming, hardened, high precision, smooth operation, high transmission efficiency, small vibration, low noise, easy to leak, the design life of more than ten years, especially due to the output shaft can be both positive and negative both directions of rotation, so a gearbox also equivalent to two to use. Motor and gearbox connection through the motor coupling on the seat and join, no field adjustment, high transmission efficiency, non-impact, low noise. ? 3. Lubrication system: Forced circulation, natural cooling and lubrication systems. Lubrication of the gear pump is mounted directly on the gearbox output shaft parts, good lubrication, structural safety and reliability. 4. lifting platform:? Lifting structure flatbed, gear box on the home, the second line of the impeller shaft, supported by six screws stand workbench. Fixed by adjusting the six bolts nuts, you can change the height of the lifting platform, thereby regulating the impeller immersion depth to obtain the amount of oxygenation process requirements. Impeller lift stroke of ± 100mm. 5. inverted umbrella Block:? Casing using inverted umbrella shaft structure coupling shaft and gearbox, automatic alignment, easy removal. And because of the axial force from the gearbox, but also to avoid hydraulic unbalance vibration caused by the eccentric rotation of the impeller when caused and noise. ? 6. inverted umbrella Impeller: Straight blade structure, using high-quality carbon steel welded shape, and balance correction, stereotypes, rust, push the radial flow capacity, wide area completely mixed, high power efficiency, and oxygenation capacity, do not hang dirty, non-blocking, good self-cleaning properties, can rotate both directions. ? 7. The electronic control system: Constant type inverted umbrella surface aerators with buck starter, variable speed surface aerators inverted umbrella with frequency control cabinet, stepless speed range, simple operation, automation a high degree of energy-saving effect; at the same time, you can configure the PLC interface according to user requirements. Another: The user can also configure separate control cabinet according to their own needs or to configure dual-speed motor to adjust the rotor speed to obtain the amount of oxygenation process requirements, save energy.