Hoisting machinery is an important infrastructure for the start-up process of production, transportation, hoisting and storage in all walks of life of the national economy. It is widely used in warehouses, ports, wharfs, factories and storage sites. For a long time, with the vigorous development of the national economy, China's steel, metallurgy, electricity, building materials, petroleum, chemical industry, new energy industry, River and sea tunnel and road and bridge construction and other fields of crane demand and drive, so that China's crane industry has achieved a high growth of more than 30% annually. At present, the annual output of domestic hoisting machinery and equipment is more than 40,000 units, the output value is more than 17 billion yuan, and the annual consumption of medium and high-grade steel products exceeds 1.7 million tons. In the components of lifting machinery, reducer is the core equipment of all kinds of components. The performance and structure of reducer not only affect and determine the speed, efficiency and stability of lifting machinery, but also are closely related and complementary to the structural connection of main components such as box, transmission system and motor, coupling, brake and drum of crane.
Yin Aiguo, general manager of Tailong reducer company, introduced that QG series products developed in 1980s are widely used in bridge cranes in China. The corresponding reducers are ZQ series, QJ series, QY series and other products. Their structures are generally large in size, low in precision, single in interface form, heavy in model, poor in gear accuracy, low in power density and high in noise. Such malpractices seriously restrict the upgrading and modernization of China's lifting machinery. It is necessary for the development of modern industry to carry out lightweight manufacturing of lifting machinery through upgrading of reducer products. It is also an inevitable choice for the special planning from the 12th Five-Year Plan to the 13th Five-Year Plan and the medium and long-term development of science and technology in China.
Through the research of this subject, the series spectrum of lightweight reducer of bridge crane has been formed; the modular design of lightweight reducer has been realized; the series design scheme of lightweight reducer has been established; the trial production and comprehensive performance test of five kinds of reducer prototypes have been completed; the new lifting mechanism with three-point support suitable for 5-100t Bridge crane and 125-200t bridge crane has been put forward. Dynamic system. According to the complete theoretical research and comprehensive performance test of the prototype, it is proved that the research results of this subject have all the conditions for popularization and application of lightweight bridge crane. Through the research of this project, it promotes the upgrading of technological innovation ability and the training of talent team, adapts to the market demand of lightweight crane, and adds a new economic growth point to the enterprise. The successful development of lightweight reducer is of great significance to promote the development of China's lifting machinery towards lightweight, energy-saving, safe and reliable international advanced technology. It will play an important supporting role in improving China's independent innovation ability and technology level, and enhancing the core competitiveness of domestic manufacturing industry.
Docking "Made in China 2025" to Promote International Modernization Level
Reducer is the core component to ensure the safety and reliability of crane operation. Its overall structure must adapt to the joint operation of crane under no-load and load conditions. Through intelligent design, the operation system can strictly follow the given lifting speed, greatly improve work efficiency, save operation time and reduce energy consumption. This project supports the lightweight R&D and manufacture of 5-200T bridge crane, and gives the economic and social benefits that must be achieved. This project belongs to a multi-disciplinary project, which combines technology research with engineering application. At present, the project has made a breakthrough in the aspects of independent intellectual property rights, scientific and technological personnel training and industrial base construction. The enterprise standard of crane two-fulcrum reducer has been studied and formulated, and the industrial standard of crane two-fulcrum reducer has been drafted for approval. Three international papers, one domestic paper and two national patents have been published. The sponsors and four co-sponsors of this project have 58 participants, including 9 doctoral students and graduate students. The research and manufacture time of this project has reached 408 person-times/month. A large number of scientific research and design personnel with professional quality have been trained. A research and development team in parameter modular design and structure modular manufacture has been established, which has laid a solid foundation for the design and manufacture of modular series products in China. Talents and technological bases have created industrial development bases.
Yin Genzhang, chairman of China Variable Speed Reduction Industry Association and Jiangsu Tailong Machinery Group Company, introduced to our reporter that lightweight bridge crane is the future development direction of our country. At present, there are more than 100,000 traditional cranes in the market of our country. The industry scale is huge and the application prospect is broad. The development of lightweight reducer can reduce the weight of bridge crane by 15%~20%, and save 100,000~150,000 tons of medium and high grade steel annually. With the advancement of the strategy of "Made in China 2025" and the demand of scientific and Technological Development and national economic construction at the present stage in China, the application of lightweight cranes can greatly reduce the height of major buildings and transform the structure of buildings to the direction of lightweight, precision, energy-saving and energy-saving. This will promote the transformation of China's manufacturing industry from big to strong, enhance the core competitiveness of equipment manufacturing industry and promote it. China's equipment manufacturing industry catches up with the international advanced level, will play an important supporting role and have a positive and far-reaching impact!
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