Pump water-cooled motor

Abstract

The invention discloses and relates to a pump water-cooled motor. a motor shellof the motor is provided with a cooling interlayer. The end of the inner shell is closed and the end of the outer shell is provided with a water outlet. The diversion outlets distributed on the ring cooling interlayer of the pump end of the motor shell are opposite to the diversion outlets of the cover end of the motor. Water from the pump passes through the diversion outlets and into the cooling interlayer of the motor shell, and is discharged from the water outlet. A motor shaft is led out from the pump end. If there is water leakage in mechanical seal, the leakage waterflows out of the pump through a draining chamber and a draining tank between the pump and the motor. A motor line is led out from a side hole of the cover end of the motor. The motor provided by the invention is characterized in that firstly the motor solves the problems of wind noiseand fan energy consumption of an air-cooled motor, greatly improves motor overload capacity, and effectively improves the disadvantages of quick motor bearing wear, fast lead insulation layer aging and burnout caused by super-large flow of a centrifugal pump; secondly the motor solves the disadvantages that water-cooled motor has high damage rate, has complex motor lead process, needs external diversion pipe, is not beautiful, has large size, and has high cost; thirdly the motor has characteristics of beautiful appearance, simple structure and easy production.

Description

technical field [0001] The invention relates to the field of water pump and motor manufacturing, in particular to a pump water-cooled motor, which is suitable for occasions where the water temperature is ≤40°C. Background technique [0002] Most non-submersible water pumps use air-cooled motors. The rapidly blowing wind produces different degrees of noise on the surface of the fan blades and the motor. The rotation of the fan blades consumes energy, and the poor cooling effect limits the overload capacity of the motor. The most widely used Centrifugal pumps often burn out due to motor overload. The motor load of the centrifugal pump increases with the increase of the water output within a large range around the design head. If the water output exceeds a certain range of the design flow, the supporting power margin of the motor will be exhausted. If the water output increases, the motor load will exceed the rated power of the motor, and the temperature of the motor will incr...

AI Technical Summary

Problems solved by technology

If the water output increases, the motor load will exceed the rated power of the motor, and the temperature of the motor will increase. Excessively high temperature will destroy the lubricating oil film of the bearing, resulting in a decrease in lubricating performance and accelerated bearing wear. The temperature of the motor during long-term continuous operation exceeds the heat resistance of the wire insulation layer. Accelerated aging of wire insulation or motor burnout

Many situations will cause super large flow rate of the centrifugal pump, such as: excessive head margin, large and long outlet pipe empty pipe, outlet pipe burst, increased water consumption, changes in the use environment, etc., if the method of increasing the power of the supporting motor is adopted To solve the problems caused by super large flow, the efficiency of the motor will be greatly reduced and the cost will increase significantly

It is a good way to solve or improve the above-mentioned problems by using the water pump to cool the motor. However, due to many disadvantages of the technology, it cannot be popularized. The specific method and its advantages and disadvantages are as follows: One is to use a conduit to introduce part of the water from the pump into the motor. The shell interlayer is returned to the water pump inlet through the conduit. This method solves the wind noise of the air-cooled motor, but there are disadvantages such as energy waste, reduced water pump performance, small cooling water, poor cooling effect, unsightly appearance, and complicated process; The conduit used for the water outlet of the water pump is completely introduced into the interlayer of the motor shell from the side of the motor, and the water is discharged from the other side. This method solves the wind noise of the air-cooled motor and has a good cooling effect, but there are multiple tubes in the elbow, which have large resistance, high production cost, and are not beautiful. , the disadvantages of complicated process; one is to seal the motor in the pipe through the mechanical seal of the pump shaft, and the pumped water flows through the surface of the motor. This method solves the wind noise of the air-cooled motor, and the cooling effect is good and beautiful. The mechanical seal is a vulnerable part that is easy to damage, and the motor will be damaged if it leaks water, so the damage rate is high. The motor wire needs to be drawn out in high-pressure water, and the process is complicated; Internally, due to the thick insulation and waterproof skin of the motor, the performance of the motor is affected, and the efficiency is not high. The sundries in the water can easily scratch the insulation and waterproof skin of the wires, and the motor damage rate is high.

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