1. The No.1 belt conveyor of Majialiang Coal Preparation Plant of Datong Coal Mine Group suffered from severe vibration. To address the vibration issue, a WF-CT550280 permanent magnet coupler was installed on the belt conveyor. The installation was completed from November 3 to 5, 2020, and the equipment has been in operation ever since. The vibration value is less than 2.4mm/S with stable operation and remarkable effect. Relevant experience is summarized as follows.

1. For the stacker-reclaimer at Guizhou Qianbei Power Plant, the frequent oil leakage issue of the hydraulic coupling has been resolved. A WF-CT400090 permanent magnet coupling was adopted, which was installed and put into operation on September 15, 2020 and has been running ever since with remarkable results. Relevant experience is summarized as follows.

In cement production enterprises, a large number of equipment such as belt conveyors and stacker-reclaimers are widely used, and these devices adopt traditional fluid couplings. A fluid coupling is a hydrodynamic transmission device that transfers energy relying on the kinetic energy of its internal oil. It takes liquid oil as the working medium, converts mechanical energy and liquid kinetic energy into each other through the pump impeller and turbine, so as to connect the prime mover and working machinery to realize power transmission. However, during operation, it has disadvantages including complicated installation and disassembly, high requirements for alignment accuracy, and large vibration values, which bring many inconveniences to daily operation and maintenance. In particular, for fluid couplings equipped with brake wheels, the middle elastic spider is extremely prone to damage, and each replacement is laborious and time-consuming.

Wolfer Permanent Magnet Technology Co., Ltd. is a national high-tech enterprise and provincial-level specialized, sophisticated, unique and innovative enterprise integrating scientific research, design, production and sales. Founded in November 2010, the company has focused on permanent magnet transmission for nearly a decade, with subsidiaries and offices established in more than 30 key cities across the country including Beijing, Shanghai, Hefei, Nanjing and Ningbo. Relying on its professional expertise and mature technologies in the field of permanent magnet transmission, the company has risen rapidly in the industrial sector and gradually grown into an industry leader. On the basis of fully introducing and absorbing advanced foreign technologies, we keep pursuing development and innovation, and have successfully developed a variety of permanent magnet product series. These products are widely applied to motor energy-saving technological transformation in numerous sectors such as electric power, metallurgy, chemical industry, cement, coal, iron and steel, and military industry, with over 1,000 application cases. The energy-saving rate of governors generally reaches 20-50%, and the company maintains a leading position in the industry in terms of market share, R&D strength and product quality of high-power permanent magnet governors.

A CT450132 permanent magnetic coupler installed on a 132kW/1480rpm belt conveyor of the coal handling system for the 2×1,000,000 kW generating units in the Phase III Project of Huainan Pingwei Power Plant has successfully passed the 168-hour trial operation. The relevant experience is summarized as follows.