Established by the Ministry of Science and Technology of the People's Republic of China and organized and implemented by the China Machinery Industry Federation, a key project of the national science and technology support plan spanning the "Twelfth Five-Year Plan" and "Thirteenth Five-Year Plan" --- "Research on Key Technologies for Lightweight Bridge Cranes" The subject of "Application and Application" has achieved a breakthrough after two years of joint promotion by the project organizer and co-organizers. Recently, the China Machinery Industry Federation has successively organized a capable scientific research and technical team to pass the comprehensive inspection and mid-term inspection and review of the reducer of the core transmission equipment of the hoisting machinery. Deeply promote the transformation and upgrading of my country's hoisting machinery to the direction of precision, lightweight, green and energy-saving, and provide a complete set of advanced technology support system to catch up with the international advanced level. Beijing Lifting and Transportation Machinery Design and Research Institute took the lead and undertook the scientific and technological support project spanning the two five-year plans of the "Twelfth Five-Year Plan" and "Thirteenth Five-Year Plan" issued by the Ministry of Science and Technology——"Key Technologies for Lightweight Bridge Cranes" Research and Application" development research topic. The core equipment and independent project of the project "Key Technology Research and Application of Lightweight Reducer for Bridge Cranes" is clearly undertaken by Jiangsu Tailong Reducer Co., Ltd. The Heavy Transportation Machinery Design and Research Institute, Zhengzhou Machinery Research Institute, Chongqing University and Jiangsu University of Science and Technology formed an industry-university-research consortium. From January 2015 to the end of December 2017, the research and project promotion of this topic were jointly carried out by level and by topic. . Yin Aiguo, general manager of Jiangsu Tailong Reducer Company, introduced that over the past two years since the beginning of 2015, Tailong Reducer Company and four co-organizers have formed a scientific research and technology alliance to implement technological innovation and development of lightweight reducer transmission equipment for cranes. . According to the spirit of "Optimization Design Report" and "Mechanical Analysis Report" of bridge cranes, the "Type Spectrum of Lightweight Reducer for Bridge Cranes", "Structure Optimization Design Report of Lightweight Reducer", "Application of New Materials for Lightweight Reducer" were completed. "Report" and other technical documents, by means of parameterization, modular design and noise reduction design, etc., the research and development of dynamic analysis of lightweight reducers, key parts manufacturing, quality control, testing and application have been well implemented. Project research and product manufacturing have achieved phased results. According to the on-the-spot investigation of experts from the inspection and evaluation team, Tailong Reducer Company has completed the prototype manufacturing of two specifications of QQY315 and QQY400 lightweight reducers, and the overall design and manufacture of three specifications of QQY450, QQY630 and QQY710 products Equipment drawings, and completed the design and manufacture of test benches for new reducers and the setup of special testing equipment.

Compared with the JB/T10817 type reducer for traditional hoisting machinery, the lightweight reducer has achieved the technical requirements of a 20% increase in power density, a 10% reduction in weight, and a 3dB reduction in noise. The bridge crane equipped with this transmission machinery can reduce the weight of the whole machine by 15%~20%, and reduce the energy consumption by more than 10%, which has laid a solid foundation for my country's hoisting machinery to climb the international advanced level and realize lightweight, intelligent and green manufacturing. Solid technical foundation.

The core of the innovation and transformation of the lightweight bridge crane developed by this subject is to optimize the structure of the reducer as the main body, and implement the transformation and upgrading of the crane. The main structure of the lightweight crane adopts "I"-shaped beams to replace the bulky overall installation platform of traditional products; the supporting point of the reducer passes through the drum bearing seat and the reducer support, and the semi-European type is set between the wheel beams of the crane; the reducer The spline output shaft of the hoist is connected to the reel flange through a steel tapered joint; the transmission motor of the hoist is fixed on the box of the reducer through the flange; the braking device of the hoist is installed on the high-speed shaft of the reducer At one end, the base is fixed on the box of the reducer... so that the crane greatly shortens the cantilever length of the motor, adapts to large torque transmission, and bears huge radial loads. Its support form is scientific, and the force layout is reasonable, endowing the new crane with the unique function of high-precision and high-power operation.

Yin Genzhang, chairman of China Reducer and Transmission Industry Association and chairman of Jiangsu Tailong Machinery Group Co., Ltd., introduced to our reporter that lightweight bridge cranes are the direction of my country's future development. At present, my country's traditional crane market has a total of 100,000 units. The industrial scale is huge and the application prospect is broad. The development and development of lightweight reducers can reduce the weight of bridge cranes by 15% to 20%, and save 100,000 to 150,000 tons of high-grade steel materials annually. With the advancement of the "Made in China 2025" strategy and the needs of my country's current technological development and national economic construction, the application of lightweight cranes can greatly reduce the height of major buildings, and the building structure is correspondingly lightweight, precise, and energy-saving. The transition to the economical direction will play an important supporting role in promoting the transformation of China's manufacturing industry from large to strong, enhancing the core competitiveness of the equipment manufacturing industry, and promoting my country's equipment manufacturing industry to catch up with the international advanced level, and will have a positive and far-reaching impact.

Excerpted from: China Machinery Network