Overview of the development process of China's speed reducer


Date:

2023-08-09

China's own design and manufacture of high-speed gear reducer (booster) speed reducer power has reached 42000kW, gear circumferential speed of 150m/s or more. However, most of the technical level of China's speed reducer is not high, the old product can not be replaced immediately, the transition of the old and new products coexist will experience a long period of time.

       In the 1970s and 1980s, there was a great development of speed reducer technology in the world, and it was closely integrated with the development of the new technological revolution. The development trend of general-purpose speed reducer is as follows:
  ① High level and high performance. Cylindrical gears generally use carburizing quenching, grinding teeth, load capacity increased by more than 4 times, small size, light weight, low noise, high efficiency, high reliability.
  ② Block combination design. The basic parameters of the number of priorities, size specifications neat, universal and interchangeable parts, series easy to expand and renovate the pattern, conducive to the organization of mass production and reduce costs.
  ③Type diversification, variant design. Get rid of the traditional single base installation, adding a hollow shaft suspension, floating support base, motor and reducer integrated coupling, multi-directional mounting surface and other different types to expand the scope of use.
  The main factors contributing to the improvement of the level of reducer are:
  ① Theoretical knowledge of the increasingly perfect, closer to reality (such as gear strength calculation methods, repair technology, deformation calculation, optimization design methods, tooth root smooth transition, new structures, etc.).
  ② the use of good materials, the widespread use of a variety of high-quality alloy steel forgings, materials and heat treatment quality control level.
  ③ Structure design is more reasonable.
  ④ The machining accuracy is improved to ISO5-6 level.
  ⑤ The quality and life of bearings are improved.
  ⑥ The quality of lubricating oil has been improved.
  Since the 1960s, China has formulated JB1130-70 "Cylindrical Gear Reducer" and a number of general-purpose reducer standard, in addition to the host plant to support the use of homemade, but also formed a number of professional reducer production plants. At present, there are hundreds of enterprises producing reducers, with an annual output of about 250,000 sets of general-purpose reducers, contributing to the development of China's machinery products. 1960s reducers are mostly manufactured with reference to the Soviet Union's technology in the 1940s and 1950s, and later developed, but limited to the design, technology and equipment conditions, the overall level of its international level of a large gap.
  Since the reform and opening up, China introduced a number of advanced processing equipment, through the introduction, digestion, absorption of foreign advanced technology and scientific research, and gradually mastered a variety of high-speed and low-speed heavy-duty gear device design and manufacturing technology. The quality of materials and heat treatment and gear processing accuracy have been greatly improved, general cylindrical gear manufacturing accuracy can be increased from JB179-60 8-9 to GB10095-88 6, high-speed gear manufacturing accuracy can be stabilized at 4-5. Part of the gear reducer using hardened gear surface, the volume and quality is significantly reduced, bearing capacity, service life, transmission efficiency has improved, energy saving and improve the overall level of the host plays a great role.
  China's own design and manufacture of high-speed gear reducer (booster) speed reducer power has reached 42000kW, gear circumferential speed of 150m/s or more. However, most of the technical level of China's speed reducer is not high, the old product can not be replaced immediately, the transition of the old and new products coexist will experience a long period of time.

Keywords:

high speed,effect,container

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