Development trend of universal decelerator
In twentieth Century the 70-80's world reductionear technologies have made great progress, tightly combined with the development of new technology revolution. The development trend of the universal decelerator is as follows:
1, high level and high performance: cylindrical gears are generally carburized, Quenched and grind. The carrying capacity is increased by more than 4 times. The volume is small, the weight is light, the noise is low, the efficiency is high, and the reliability is high.
2, the building block design: basic parameters by priority number, size regular, versatility and interchangeability of parts, a series of easy expansion and retrofit, conducive to mass production and reduce costs;
3, the type is diversified, variant design is more: get rid of the traditional single base installation mode, add hollow shaft suspension type, floating supporting base, motor and reducer together, and multifaceted installation surface and so on, expand the scope of application.
The main factors to improve the speed reducer are as follows:
1, the gradual improvement of theoretical knowledge is closer to reality, such as gear strength calculation method, modification technology, deformation calculation, optimization design method, smooth transition of root and new structure.
2. With good materials, all kinds of high quality alloy steel forgings are generally adopted, and the quality control of materials and heat treatment is improved.
3, the structure design is more reasonable;
4, to improve machining accuracy of grade 3-6;
5, the quality and life of the bearing are improved.
6, improve the quality of lubricating oil.
Since 1960s, Chinese has developed a standard speed reducer JB113070 "cylindrical gear reducer" and a number of GM, in addition to the host plant supporting the use of self-made, also formed a group of reducer factory specializing in the production of. There are hundreds of enterprises producing decelerator in China, which have made a contribution to the development of China's mechanical products by about 250 thousand sets of universal decelerator.
The reducer is mostly made with reference to the Soviet Union in 1960s twentieth Century the 40s-50s technology, although some development, but due to the limited level of technology and equipment conditions at the time of design, the overall level and international level gap. Since the reform and opening up, China has introduced a number of advanced processing equipment, and gradually introduced all kinds of high-speed and low-speed heavy-duty gear design and manufacturing technologies by introducing, digesting and absorbing advanced technology and research. Material and heat treatment quality and machining accuracy are improved, manufacturing precision and general cylindrical gear can be increased to the level JB17960 from 8 to 9 GB1009588 level 6, the manufacture precision of the high-speed gear can be stabilized at 5 level. After the hard gear surface is applied to some reducer, the volume and quality are obviously reduced, and the bearing capacity, service life and transmission efficiency have been greatly improved, which plays a great role in saving energy and improving the overall level of the main engine.