Introduce

YE3 series explosion-proof low voltage three-phase asynchronous motor

Frame number: H80-450

Capacity: 0.55~1000kW

Number of poles: 2-12P

Voltage: 1000v and below

 

Common reasons for submersible pump to burn motor

  1. The water pump is not installed properly

The installer does not lower the pump through the pull ring on the pump body, but puts the pump into the water through the pull cable. Because the submersible sewage pump is completely closed, if you pull the cable, there will be damage to the seal at the cable line, so that water enters the pump body, causing the motor to burn;

  1. Excessive liquid impurities, fibers, and large debris.

Because the submersible sewage pump is to play sewage, but can not transport sludge and debris. Because sludge, debris will make the pump body clogged, resulting in burning motor;

  1. Pump idling

Because the submersible sewage pump is cooled by liquid, if the liquid level in the pool is lower than 2/3 of the pump body, it will burn the motor because the pump body temperature is too high;

  1. Overcurrent

If the pump is used when the overcurrent will cause the pump to burn the motor, the common overcurrent situation is: the actual head of the pump is much larger or much smaller than the head of the selected model, the liquid concentration is too large, and the three-phase current is unbalanced.

The above points are the main reasons for the submersible pump burning motor, the user can view the photolayout during the installation and use of whether there is non-standard behavior and timely correction, so as not to cause unnecessary losses.

 

FAQ

  1. According to what selection of mechanical seal friction pair material?

A: It should be selected according to the nature of the medium, working pressure, temperature, sliding speed and other factors, and sometimes the ability to withstand short time dry friction when starting or liquid film damage is considered.

  1. What are the effective ways of labyrinth sealing to increase the resistance of the medium?

A: 1) Reduce the gap, 2) strengthen the vortex, 3) increase the number of sealing teeth, 4) try to convert the kinetic energy of the air into heat energy

  1. What is the working principle of floating ring seal?

A: The floating ring seal is based on the throttling effect generated in the narrow gap between the shaft and the floating ring, and the sealing oil higher than the gas pressure is injected in the gap to achieve the purpose of sealing the gas.

  1. What is the cause of the increased leakage of the floating ring seal?

A: 1) The floating ring is used for a long time, normal wear, so that the gap increases; 2) The bushing surface of the floating ring hole is rough, the precision is low, and the gap increases due to short time wear; 3) Improper assembly causes deflection, and the fitting accessories fall off, so that the oil flows out from other gaps, and the leakage increases;

  1. What is the role of the oil baffle? How to measure and adjust the oil barrier gap?

A: 1) The role of the oil stop is to prevent the bearing lubricating oil from flowing along the journal to the outside of the bearing, and the installation position of the oil stop has two kinds: one is on the bearing seat, and the other is on the bearing bush; 2) The oil barrier gap can be measured with a ruler when the oil barrier is disassembled or assembled. For the bearing in the oil barrier gap can be appropriately relaxed, in the face of the oil barrier gap requirements on the bearing seat is more strict, the general requirements of the lower part is 0.05-0.10mm, both sides are 0.10-0.20mm, the upper part is 0.20-0.25mm.