Recently, the China Machinery Industry Federation organized a strong project acceptance team to listen to the work report of the subject project – “Research and Application of Key Lightweight Technology of Bridge Hoisting Machinery”, organized technical certification on site, and reviewed the lightweight core transmission of hoisting machinery. The equipment reducer has been comprehensively accepted. The acceptance expert group fully affirmed the timely progress of the project, and achieved a number of technological breakthroughs, which provided a complete set of technical support for further promoting the transformation and upgrading of my country’s hoisting machinery in the direction of precision, light weight, green energy saving, and catching up with the international advanced level system.
The project identified: Henan Yuntian Crane Co., Ltd. optimized the structure and transmission system of the hoisting mechanism of the lightweight bridge crane, and proposed the structural form of the unilateral support of the lightweight reducer; parameterization based on the concept of generalization and combination diversity , modular technology to form a series spectrum of bridge crane reducer; based on the optimal hardened layer depth design, residual stress and deformation control of hardened gear precision heat treatment technology, the production process of high power density gears has been formed, and the gear has been improved. and the bearing capacity of the reducer; using dynamic and static combined sealing technology to solve the problem of oil leakage from the reducer; completed the lightweight design and manufacture of 10 prototypes.
According to the requirements of the Ministry of Science and Technology of the People’s Republic of China and the review and approval of the project acceptance group, compared with the JB/T10817 type reducer supporting traditional hoisting machinery, the power density of the lightweight reducer is increased by 41%, the bearing capacity is increased by 30%, and the weight is reduced by 10%. , The noise is reduced by 3dB (decibel), and the material is saved by about 10%, reaching the leading level of similar products in China. The bridge crane using this transmission machinery can reduce the weight of the whole machine by 15%~20%, and reduce the energy consumption by more than 10%. Solid technical foundation.
Through the research of this subject, the series type spectrum of the lightweight reducer for bridge cranes has been formed; the modular design of the lightweight reducer has been realized; the series design scheme of the lightweight reducer has been established; the trial production of five reducer prototypes has been completed. Comprehensive performance test; proposed a three-point support new type of hoisting mechanism transmission system suitable for 5~100t bridge cranes and 125~200t bridge cranes. According to the complete theoretical research of the subject and the comprehensive performance test of the prototype, it is proved that the research results of this subject have all the conditions for the popularization and application of lightweight bridge cranes. Through the research of this project, it has promoted the improvement of the technological innovation ability of the enterprise and the training of the talent team, adapted to the market demand of lightweight cranes, and added a new economic growth point for the enterprise. The successful development of lightweight reducer is of great significance to promote the development of my country’s hoisting machinery to the direction of lightweight, energy-saving, safe and reliable international advanced technologies, to improve my country’s independent innovation capability and technical level, and to enhance the domestic manufacturing industry Core competitiveness will play an important supporting role!
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