Views: 1 Author: WeiGao Transmission Publish Time: 2021-09-29 Origin: WeiGao Transmission
The reducer has a wide range of applications, and its products and services involve metallurgy, nonferrous metals, coal, building materials, shipbuilding, water conservancy, electric power, construction machinery, petrochemical and other industries. With the innovation of science and technology, great progress has also been made in reducer technology. Since the 1960s, China has successively formulated a number of standards for general reducers such as jb1130-70 cylindrical gear reducer. In addition to the self-made and supporting use of the main engine factory, a number of professional reducers have also been formed. There are hundreds of enterprises producing speed reducers in China, with an annual output of about 250000 universal speed reducers, which has contributed to the development of China's mechanical products.
The future technical development trend of reducer is as follows:
1. High level and high performance: cylindrical gears are generally carburized, Quenched and ground, the bearing capacity is increased by more than 4 times, small volume, light weight, low noise, high efficiency and high reliability;
2. Building block combination design: the basic parameters adopt priority number, the dimensions and specifications are neat, the parts have strong universality and interchangeability, and the series is easy to expand and renovate, which is conducive to organizing mass production and reducing costs;
3. Diversified types and many variant designs: it gets rid of the traditional single base installation mode, and adds different types such as hollow shaft suspension, floating support base, integrated connection between motor and reducer, multi-directional installation surface and so on, so as to expand the scope of use.
The main factors that promote the improvement of reducer level are:
1. The theoretical knowledge is becoming more and more perfect and closer to reality (such as gear strength calculation method, modification technology, deformation calculation, optimization design method, smooth transition of tooth root, new structure, etc.);
2. Good materials and various high-quality alloy steel forgings are widely used, and the quality control level of materials and heat treatment is improved;
3. More reasonable structural design;
4. The machining accuracy is improved to iso5-6;
5. Improve bearing quality and service life;
6. The quality of lubricating oil is improved.
In addition, since the reform and opening up, China has introduced a number of advanced processing equipment. Through the introduction, digestion and absorption of foreign advanced technology and scientific research, China has gradually mastered the design and manufacturing technology of various high-speed and low-speed heavy-duty gear devices. The quality of materials, heat treatment and gear machining accuracy are greatly improved. The manufacturing accuracy of general cylindrical gears can be improved from grade 8-9 of jb179-60 to grade 6 of gb10095-88, and the manufacturing accuracy of high-speed gears can be stabilized at grade 4-5. After some reducers adopt hard tooth surfaces, the volume and mass are significantly reduced, and the bearing capacity, service life and transmission efficiency are greatly improved, which plays a great role in saving energy and improving the overall level of the main engine.
The power of the high-speed gear reducer (accelerator) designed and manufactured by China has reached 42000kw, and the gear circumferential speed has reached more than 150m / s. However, the technical level of most speed reducers in China is not high, and the old products cannot be replaced immediately. The coexistence and transition of new and old products will take a long time.