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QTZ-200塔机是QT4-10塔机的改型产品,它设计于七十年代初,是国内第一代自升塔式起重机。在使用中QTZ-200塔机也暴露出了一些问题,针对国内塔机一般使用年限较长更新换代慢的特点,我们把在生产和使用中发现的主要问题整理介绍,以供生产单位和使用部门参考。一、制造方面 1.集电环 QTZ-200塔机共使用两只集电环。使用结果发现,该机的两只集电环经常发生滑环表面烧坏现象,滑环表面有许多烧结斑点,拆卸检查发现,主要是装配集电环时,没有进行足够的跑合,碳刷与滑环表面实际接触面积过小;滑环表面光洁度不好;有异物及电刷在使用中发生移位造成接触不实;遇强电流冲击等原因造成电刷与滑环之间打火放电致使滑
The QTZ-200 tower crane is a modified product of the QT4-10 tower crane. It was designed in the early 1970s and is the first generation of self-elevating tower cranes in China. In use, the QTZ-200 tower crane has also exposed some problems. In view of the fact that the domestic tower crane has a long service life and a long service life, we have introduced the main problems found in production and use for production units and use. Department reference. First, the manufacturing aspects 1. Collector rings QTZ-200 tower cranes use a total of two collector rings. The results show that the surface of the slip rings on the two collector rings of the machine is often burned out. There are many sinter spots on the surface of the slip rings. The demolition inspection revealed that there are not enough running and brushing when assembling the collector rings. The actual contact area with the surface of the slip ring is too small; the smooth surface of the slip ring is not good; foreign matter and brushes are displaced in use and cause false contact; in case of strong current impact, etc., spark discharge occurs between the brush and the slip ring Slippery