Introduction of new type diaphragm rubber coupling and standardization development of my country's hoisting machinery industry

　　[XNUMX] Introduction to the new diaphragm rubber coupling

　　The elastic coupling can compensate for the axial offset, radial offset or angular offset of the shafting axis during operation, and the operation of the shafting equipment.

　　Due to the extensive implementation of flexible installations such as main engines, the current ship power system has higher and higher requirements for the performance of the elastic coupling in the shafting. It is not only required that the elastic coupling can compensate for the increasing axis offset and the shafting The additional reaction force of the equipment is getting smaller and smaller, and the vibration damping function that the elastic coupling can achieve is also required.

　　In order to meet the requirements of large offset compensation and low stiffness (especially low radial stiffness) of quincunx elastic coupling in marine power system, a new type of diaphragm rubber coupling structure was studied.Since the outer dimensions (diameter D and length L) have been given when designing the coupling structure, it is necessary to optimize the structure as much as possible under this constraint, and reduce the stiffness of the coupling, especially the radial stiffness, to Meet the requirements of the system for equipment.

　　The diaphragm rubber coupling is mainly composed of metal diaphragm groups at both ends, connecting flanges, rubber blocks, etc.It transmits the power output by the main machine to the shafting system through the metal diaphragm group and the rubber block, and compensates the axis deviation between the main machine and the shafting system by means of the elastic deformation of the diaphragm group and the rubber block.In order to reduce the impact of the additional reaction force generated by the elastic deformation on the shafting equipment, the system requires the rigidity of the coupling, especially the radial rigidity to be reduced as much as possible.

　　In terms of structural design, for the stiffness characteristics of the diaphragm rubber coupling, especially the radial stiffness characteristics, the comparison approach is to increase the length and diameter of the coupling and optimize its internal structural parameters.The length and diameter parameters have been given, if the stiffness characteristics are required, the only way to optimize the structure of the two sets of metal diaphragms and the rubber block between them.

　　Hoisting machinery is widely used in various sectors of the national economy due to its working characteristics of clearance movement, variable load, frequent forward and reverse, alternate dynamic load, short-term repetition, and cycle cycle. It is an important link in realizing the modernization and automation of industrial processes.Plum blossom couplings are widely used because of their compact structure, maintenance-free, vibration absorption, compensation of radial and angular deviations, etc., which can cause damage to structural parts caused by resonance during frequent lifting and braking of lifting machinery. .In engineering practice, designers often determine the relevant parameters of plum couplings based on past experience or related standards, and the coefficients are generally larger, causing material waste.Therefore, there are stress characteristics analysis and structural optimization of the plum blossom coupling.

　　[XNUMX] New thinking on the standardization development of my country's hoisting machinery industry

　　1. Standardization development of my country's crane industry

　　At present, hoisting machinery standards and industry standards include "Crane Design Specification" (GB/T3811-1983), "Lifting Machinery Regulations" (GB6067-1985, revised edition), etc., with more than 200 items, drum gear couplings The content of its standard composition mainly includes foundation, products, hygiene, management and methods.On this basis, more than a hundred standards have been adopted.According to the existing and hoisting machinery standards and industry standards, combining with the actual development of my country's hoisting machinery industry, referring to the developed experience, and actively participating in standardization activities, establishing a sound and perfect hoisting machinery standard system to help my country's machinery The heavy industry is gradually moving towards the level.

　　2. The development trend of my country's crane industry

　　Tonnage polarization and intelligence are the development trend of my country's crane industry in the future.The "polarization" development of cranes refers to "large-scale" and "miniature" respectively.my country's crane industry has made great breakthroughs in the development of equipment "large-scale", and "miniature" will become a brand new development opportunity.Increasing investment, multi-functional "mini" cranes are widely used in the production and manufacturing of various industries, which undoubtedly expands a large market space for my country's lifting machinery industry.

　　The intelligent development of hoisting machinery has increased its skills so that it can be suitable for work in various types of space environments to expand the application fields of cranes.The introduced technology is considered from the perspective of humanization, further the functions of cranes, and product innovations are tried, which brings brand new opportunities for the development of my country's lifting machinery industry.

　　In addition, the standardized development of the crane industry is aimed at sustainable development in order to seek high economic benefits.On the basis of the traditional profit model, the e-commerce platform is used to help crane machinery manufacturers reduce costs, while obtaining high economic benefits, realizing resource optimization, and tapping new market potential.Judging from the current practice, its effect is considerable, which has opened up a new path for the standardization development of my country's lifting machinery industry.

　　As one of the important industries of the national economy, my country's lifting machinery industry is facing huge opportunities and challenges. This requires a clear understanding of the current development situation, understanding of its own strengths and weaknesses, and timely improvements and upgrades.Under the comprehensive standard system of lifting machinery, the standardized development of the lifting machinery industry has improved the degree of production of lifting machinery in my country, and expanded its broad development space. It is positive for the development of the lifting machinery industry and even the national economy. Meaning.