The development process of speed reducer
In the 1970s and 1980s, there was a great deal of speed reducer in the world, and it was closely integrated with the new skills revolution. The trend of general motors is as follows:
High level and high performance. The cylindrical gears can be made of carburized quenching and grinding teeth, and the bearing capacity can be more than four times, small size, light weight, low noise, high power and high reliability. Modular assembly planning. The basic parameters are selected with priority number, standard scale standard, and the versatility and interchangeability of parts. The series is simple extension and variety renovation, which is conducive to the arrangement of batch production and cost reduction.
The type is diversified, the variation plan is much. Equipment to get rid of the traditional single base, added a hollow shaft hanging, floating bearing base, motor and reducer, one-piece connection surface multi-azimuth equipment such as different types, expand the use range.
The main
factors that promote the progress of decelerator are:
The theoretical
knowledge is becoming more and more perfect, which is more closely based
on practice (such as gear strength accounting method, repair skill,
deformation accounting, optimization planning method, root oil slip
transition, new layout, etc.).
With good data, all kinds of high quality alloy steel forgings, data and heat treatment quality control can be improved.
The layout plan is more reasonable. The machining accuracy has been improved to the ISO 5-6 level. The quality of the bearing and the progress of longevity. Improve the quality of lubricant.
Since 20
century 60 times, China has successively developed JB1130-70 the
cylindrical gear reducer, a batch of universal standard reducer, in
addition to supporting forms a cheap use, also formed a batch of reducer
professional production factory. At present, there are a few hundred
companies producing speed reducers nationwide, with a yearly output of
about 250, 000 engine reducers, and dedicated to the development of
Chinese mechanical products.
20 centuries 60
time reducer are mostly refer to the skills of the Soviet union in the
20th century 40-50 times, though they have carried out later, but limited
to planning, technological level, and equipped with conditions at that
time, and its overall level and international level has great distance.
Since China's reform and opening up, China introduced a number of leading processing, after introducing, digesting and absorbing foreign leading skills and scientific research, and gradually mastered all kinds of high-speed and low-speed gears equipment planning construction skills. Materials and heat treatment quality and have significant progress, the gear machining accuracy of general production precision cylindrical gears are available from JB179-60 8-9 grade progress to level 6 GB10095-88, production of high-speed gear accuracy can be stable in 4-5. Some slowdown after the pause in the hard tooth face, significantly reduce the volume and quality, bearing ability, using the full, transmission power had great progress, to host the overall level of energy saving and progress have very big effect.
The power of China's self-planning high-speed gear reduction (increase) speed device has reached 42000kW, with the speed of the gears reaching 150m/s. However, most of China's decelerator skills are not high enough, and old goods cannot be replaced immediately, and the transition of old and new goods will be a long time.