1. If there are sliding bearing problems in the design and manufacture of explosion-proof motors
The common sliding bearing oil leakage of high-voltage explosion-proof motors mainly occurs at the bearing interface, inlet and outlet, and sealing parts. The leakage of these parts is often due to the neglect of important parameters such as structure and strength during the design process of high-voltage explosion-proof motors. In the manufacture of bearings, there is no need to strengthen the leak-prone parts such as the oil inlet and outlet ports, the inlet and outlet of electronic components, and the seals that need to be airtight, resulting in oil leakage of high-voltage explosion-proof motors under high-speed operation or long-term operation. question. For such problems, we should first start from the design point of view. In the design process of high-voltage explosion-proof motors, the structural strength and size of sliding bearings should be scientifically designed to ensure a reasonable fit between bearing supports and bearing bushes. At the same time, it is necessary to choose a more airtight structure and device to reduce the possibility of oil leakage from the structure. During the manufacturing process of sliding bearings, the possibility of oil leakage in castings should be avoided. In the manufacturing process of sliding bearings, problems such as cracks and trachomas in castings should be avoided to improve the anti-leakage ability of bearings and explosion-proof motors. In addition, sealing parts are key components. In the process of design and production, it is necessary to choose sealing materials with high sealing quality, anti-aging, and anti-deformation. In particular, the material, size and quality control of floating sealing rings should be strengthened to achieve design and production. Oil leakage control of sliding bearings in the manufacturing process, and then achieve the production goal of high-voltage explosion-proof motors.

2. Quality problems of sliding bearings in the assembly process
In the structure of large and medium-sized high-voltage explosion-proof motors, the sealing method used for sliding bearings generally adopts floating seal rings. This material belongs to organic polymer polyimide materials. Damage often occurs in the bearing, and the oil leakage problem caused by the damage of the floating seal ring accounts for more than 50% of the failure of the entire sliding bearing. For this kind of problem, prevention and control should be carried out in combination with the sliding bearing process. It is necessary to avoid problems such as forced extrusion and irregular operation of the sliding bearing during assembly, to achieve careful assembly, to avoid damage to the floating sealing ring, and to improve the assembly quality. On the basis of this, the resistance of the sliding bearing to leakage is improved.