안녕하십니까?
ks b 6321배수용 수중 모터펌프의 규격을 보다가 궁금한 것이 있어 질문 합니다. 전동기을 형,식,극수,주파수,송출방식등에 의해 구분하고 있는데, 여기서 "식 "을 건식 유봉식 캔드식 수봉식으로 나누워놓았더군요..
이 항목들이 이해가 되지 않습니다. 모터의 냉각방식을 말하는 것 같기도 하고..??
그리고 모터에 절연유를 사용하는 경우 이 절연유에 의해 모터실 내부에 특별한 장치가 필요한지도 궁금합니다.
dmmb님의 글
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안녕하십니까?
ks b 6321배수용 수중 모터펌프의 규격을 보다가 궁금한 것이 있어 질문 합니다. 전동기을 형,식,극수,주파수,송출방식등에 의해 구분하고 있는데, 여기서 "식 "을 건식 유봉식 캔드식 수봉식으로 나누워놓았더군요..
이 항목들이 이해가 되지 않습니다. 모터의 냉각방식을 말하는 것 같기도 하고..??
그리고 모터에 절연유를 사용하는 경우 이 절연유에 의해 모터실 내부에 특별한 장치가 필요한지도 궁금합니다.
----------------- [답 변] -------------------
설명을 하려니 아는게 짧아서 남의 글을 인용합니다. (http://geoheat.oit.edu/bulletin/bull19-1/art58/art58.htm)
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There are three basic types of submersible pump motors: wet winding(수봉식), oil filled(유봉식), and hermetically sealed(캔드식). 건식은 말그대로 건식임.
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In the wet winding motor, the motor is filled with water. Water proofing is achieved by special insulation on the stator winding wire, usually plastic, and because the wire and its insulation are bulkier, the motors are larger for a given rating. The motor is carefully filled at the surface to ensure there are no air bubbles and a filter installed in the fill port to ensure that the motor operates in clean water. Some brands are pre-filled and have an expansion diaphragm to allow for expansion and contraction of the filling solution and motor. Rotating seals and a sand slinger at the upper end prevent free circulation of well fluid in and out of the motor and reduce seal and spline wear by abrasive particles. Bearings are water lubricated.
Oil filled motors are prefilled with a dielectric oil. A rotating shaft seal (with sand slinger) is utilized to keep the oil in and water out. Because water has a higher density than oil, the motors have an oil reservoir with expansion bladder at the bottom. Any water that leaks through the seal in time migrates to the bottom of the reservoir. However, if the seal leaks there is probably always a small amount of water mixed with the oil surrounding the windings. Bearings are oil lubricated giving them higher capacity.
Hermetically sealed motors have the winding encased in a welded can, usually stainless steel. The windings may be similar to a surface motor with air inside the can but usually are embedded in a thermo-setting resin to provide better heat dissipation and reduce the possibility of water leaking in. The rest of the motor is similar to the wet type described above with the bearings water lubricated.
dmmb
------------------------------------
안녕하십니까?
ks b 6321배수용 수중 모터펌프의 규격을 보다가 궁금한 것이 있어 질문 합니다. 전동기을 형,식,극수,주파수,송출방식등에 의해 구분하고 있는데, 여기서 "식 "을 건식 유봉식 캔드식 수봉식으로 나누워놓았더군요..
이 항목들이 이해가 되지 않습니다. 모터의 냉각방식을 말하는 것 같기도 하고..??
그리고 모터에 절연유를 사용하는 경우 이 절연유에 의해 모터실 내부에 특별한 장치가 필요한지도 궁금합니다.
----------------- [답 변] -------------------
설명을 하려니 아는게 짧아서 남의 글을 인용합니다. (http://geoheat.oit.edu/bulletin/bull19-1/art58/art58.htm)
---------------------------------------------------------------------
There are three basic types of submersible pump motors: wet winding(수봉식), oil filled(유봉식), and hermetically sealed(캔드식). 건식은 말그대로 건식임.
---------------------------------------------------------------------
In the wet winding motor, the motor is filled with water. Water proofing is achieved by special insulation on the stator winding wire, usually plastic, and because the wire and its insulation are bulkier, the motors are larger for a given rating. The motor is carefully filled at the surface to ensure there are no air bubbles and a filter installed in the fill port to ensure that the motor operates in clean water. Some brands are pre-filled and have an expansion diaphragm to allow for expansion and contraction of the filling solution and motor. Rotating seals and a sand slinger at the upper end prevent free circulation of well fluid in and out of the motor and reduce seal and spline wear by abrasive particles. Bearings are water lubricated.
Oil filled motors are prefilled with a dielectric oil. A rotating shaft seal (with sand slinger) is utilized to keep the oil in and water out. Because water has a higher density than oil, the motors have an oil reservoir with expansion bladder at the bottom. Any water that leaks through the seal in time migrates to the bottom of the reservoir. However, if the seal leaks there is probably always a small amount of water mixed with the oil surrounding the windings. Bearings are oil lubricated giving them higher capacity.
Hermetically sealed motors have the winding encased in a welded can, usually stainless steel. The windings may be similar to a surface motor with air inside the can but usually are embedded in a thermo-setting resin to provide better heat dissipation and reduce the possibility of water leaking in. The rest of the motor is similar to the wet type described above with the bearings water lubricated.
Have a good day