The main reasons for the lagging development of idlers are as follows:
1) the design thinking lags behind, and has been following the basic design concept of 50 years ago, without advancing with the times. In the past, belt conveyor was a small and simple concept, but now it is a large and reliable concept, with qualitative differences. It is required that the idea of simplicity, low value and easy consumption should be abandoned in the design of idler.
2) due to the narrow design technology, it is impossible to find a fundamental breakthrough in the field of traditional technology in the industry. Interdisciplinary R & D will find a new world. For example, the waterproof structure design of idler.
3) the manufacturing equipment and technology of idler seriously lags behind the development of the times. Many fields of mechanical manufacturing have entered the era of machining center, while the processing of idler is still far from the era of ordinary special machine tools, and the processing quality can not be guaranteed at all.
Idler is an important neglected part of belt conveyor. There are deep-seated problems and industry limitations in the design and manufacturing technology of idler. It needs to be repositioned with today's economic and technological concepts.