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Author of the application of SEW reduction motors in the sewage treatment industry: SEW Transmission Equipment (Tianjin) Co., Ltd. Zhao Guowei Today, environmental protection is the guarantee for sustainable social and economic development. This view is recognized by people. * * and * * We have also promulgated laws and taken measures to prevent and control pollution sources in a phased and step-by-step manner so that our country's ecological environment can be maintained better. Especially in several large water source pollution areas (such as the Huaihe River Basin, Tai Lake Basin, Yangtze River Basin, etc.), the treatment of urban domestic sewage in the basins has become increasingly difficult. * * Plans have also been made to proceed in stages to ensure that the discharge of urban sewage also meets standards within the deadline. Therefore, everywhere * * , enterprises invest in the construction of sewage treatment facilities of corresponding scale, so as to effectively improve the water quality and ecological environment of rivers and lakes in the basin. Sewage treatment technology uses various facilities, equipment and process technologies to separate and remove pollutants contained in sewage from the water, converting harmful substances into harmless and useful substances, so that the water is purified and resources are fully utilized. Currently, the widely used sewage treatment processes include oxidation ditch process and SBR process, among which oxidation ditch process is the most common. The main equipment used by SEW reducer in the oxidation ditch process of rotating disk aerator is aerator, scraper and suction machine, etc. The aerator is divided into rotating brush aeration and rotating disc aeration. It is a special equipment for the oxidation ditch process. The key technology is the design of the new rotating brush and rotating disc, the structure of the flexible coupling, the three-dimensional adjustable traveling bearing support, the performance, design and processing of the new reduction gearbox, the processing of the long axis and the starting performance of the supporting motor. As the most important mechanical equipment in the oxidation ditch treatment process, aeration equipment is one of the keys that affects the efficiency, energy consumption and stability of the oxidation ditch treatment. It not only has the functions of oxygenating, pushing, and mixing, but also determines the floor space and infrastructure investment of the oxidation ditch. As the oxidation ditch treatment process has higher and higher requirements for aeration equipment, and energy resources are becoming increasingly tight, the research on new high-efficiency and low-energy consumption aeration equipment has become an important factor in promoting the development of oxidation ditch treatment technology and energy saving and consumption reduction. SEW's K series reduction motors are widely used in aerators. In order to ensure sufficient oxygen supply, the reduction motor is required to run continuously for 24 hours, which can save energy and reduce consumption with extremely high efficiency. At the same time, the reducer and motor are integrated into one machine to save installation space. In response to the different requirements of rotating discs and rotating brushes, SEW has prepared corresponding models for them. For corrosive environments, the reduction motors have been treated with anti-corrosion treatment. The rapid rotation of the aerator can easily splash sludge onto the gear motor. Over time, the breather valve of the reducer may become clogged, and it is difficult to maintain a gear motor that is filled with sludge. To this end, SEW has specially configured an extended breather pipe and oil injection pipe for the reduction motor of the aerator, which not only prevents the breather valve from clogging but also facilitates maintenance. SEW reducer is used for scraper and suction machine. The scraper and suction machine is a special equipment for sludge concentration tank and sedimentation tank. According to the transmission mode, it is divided into two types: central transmission and peripheral transmission. Technical key: Bridge structural design and force calculation ； Bridge processing and cross frame and scraper material selection and processing ； Determination of driving power ； The arrangement of vertical bars and the arrangement of scrapers on the bottom of the pool ； Processing of reduction mechanism ； Over-torque protection and automatic alarm, parking and PLC automatic control of the whole machine. Main technical parameters: Outer edge line speed: 1m/min～2m/min ； Motor power: 0.37kW～3.0kW ； Chi Jing: 6.0m～55m.． In response to the requirements of low speed and large speed ratio of the scraper and suction machine, SEW reduction motor cleverly connects two-stage reducers in series through modular combination, so that the total reduction ratio can reach about 10,000. If you don't pay attention, you can hardly notice the movement of the scraper and suction machine. For the requirements of over-torque protection and automatic alarm, SEW reduction motor can provide a torque limiter, which can set the limited torque on the basis of meeting the driving requirements, which can effectively protect the reduction motor and scraper and suction machine. The SEW torque limiter is used in conjunction with the control circuit to achieve automatic alarm and power-off protection. F series reduction motors are used for scrapers and suction machines. Company profile: The German SEW company was founded in 1931 and is headquartered in Brussels, Baden-Württemberg, Germany. So far, it has 9 manufacturing plants, 56 assembly plants and more than 200 sales and service offices worldwide, covering five continents and almost all industries in the world. * * . With more than 10,000 employees worldwide, its production technology and market share are among the world's leaders, and it is world-famous in the field of international power transmission. SEW products are transmission equipment in basic industries, including reducers, reducers and frequency converters. SEW's products use a new "module combination" concept to provide a broader space for the development of mechanical and electronic integration. They are used in various mechanical equipment, including steel, metallurgy, cement, mining, infrastructure, building materials, environmental protection, papermaking, ports, airports, petrochemicals, light industry, food and beverages, warehousing and logistics, etc. exist * * SEW's products are widely used in key engineering projects, such as major domestic ports, Capital Airport and major domestic airports, Capital Theater, Beijing Great Hall of the People's large and small auditorium renovation projects, Changchun FAW, Shanghai General Motors, Volkswagen, Shanghai Maglev Train Engineering Cheng, major sewage treatment projects such as Gaobeidian sewage treatment plant, Chenming Paper sewage treatment plant, Tianjin Dongjiao sewage treatment plant, Langfang sewage treatment plant, etc., as well as the famous China Millennium Monument, Three Gorges Water Conservancy Project, etc., all of which explain to people the entrepreneurial spirit of SEW: Pursue excellence and strive for excellence. SEW's investment projects in China are long-term investments. Currently, SEW Group has 5 wholly-owned manufacturing and assembly companies in Tianjin, Suzhou and Guangzhou, China. The Tianjin manufacturing plant is the only manufacturing center in the Asia-Pacific region. At the same time, the head office in China is also located in Tianjin, namely SEW Transmission (China) Investment Co., Ltd. Since SEW was registered in Tianjin in 1994, it has developed rapidly in China in just a few years and has become the largest manufacturer of high-quality reducers and motors in the Chinese market.