What is the reason for the sluggish movement of the shaft disc in the LSY type liquid chlorine submersible pump, as well as its automatic shutdown after the motor starts?
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The shaft disc of the LSY type liquid chlorine submersible pump does not rotate smoothly; after the motor starts (with frequency conversion and automatic protection devices), the pointer of the ammeter does not move, and the motor stops operating immediately. After switching to the backup line, the pump was started; the pointer moved, the current level was high, and the pump stopped operating automatically. What could be the reason?
If the rotation is not smooth, the motor should not be started; there must be a reason for this. After disassembling and inspecting it, it will be clear what the issue is. :lol
High current, overheat protection – of course, the machine shuts down. Let’s fix the pump first. Focus on checking the bearings, and secondly, whether the impeller is loose and in contact with the pump casing.
Not long ago, the submersed long-axis section was lifted out, and the sliding bearings and shaft sleeves were replaced. The bushing is made of graphite; it seems to contain other components as well, because the old sliding bearing, once removed, can expand and deform. May I ask, how is the assembly clearance between this type of bearing and the sleeve specified, and what are the requirements for calculations?
Change it to: The bearing is made of graphite