Motor bearing temperature detection and control

Motor bearing temperature detection and control, 2020 - 12 - Motor bearing temperature is a very key performance parameters, the use of different operating mode to the requirement of bearing temperature have certain difference. There are many factors which can affect the bearing temperature, in addition to the factors of bearing system itself, and motor running environment and winding temperature rise are directly related. Bearing temperature exceeds a certain degree, grease degradation failure may appear, lead to adverse until the consequences of burning bearing lubrication, so should closely monitor the bearing temperature changes. Bearing temperature thermometer available method or embedded thermometry meter method to measure. When measured, should guarantee the thermometry meter with good heat transfer between measured parts, for example, all the air gap should with thermal conductive paint filler. Measuring location should be as much as possible close to the measuring point as described in the table. Between points and with bearing the most hot spots, and temperature difference between its value related to the bearing size. For pressure into the bearing sleeve bearing and the diameter of less than 150 mm ball bearings, or roller bearings, general rules between the measuring point temperature is neglected, but for larger bearings, by measuring point temperature difference is bigger. Motor knowledge development, 1 for bearing the provisions of the measuring point location according to the difference of bearing type, the position of the measuring point is different, in order to facilitate communication, we put the two measuring points specified in the test specification fine rei to point A and B respectively. Two points on different bearing the corresponding position of the specific provisions for: low ball bearing and ball bearing point A is located in the bearing interior, away from the bearing outer ring no more than 10 mm; Point B is located in the bearing surface of outdoor, as close as possible to the bearing outer ring. Low sliding bearing point A is located in the bearing pressure area, from between the oil film is not more than 10 mm; Point B is located in other parts of the bearing. 2, each measuring point location selection rule for external rotor motor, A point is located in the stationary part of the bearing inner ring is less than 10 mm, point B is located in the outer surface of the stationary part, as close as possible to the bearing inner ring. Low point away from the bearing outer ring or oil film clearance distance from the thermometer or embedded thermometry meter recently counted up. Low bearing shell is supporting bushing material components, to press the bush people or with other methods for indoor bearings, pressure area is under the rotor weight and radial load ( For example, the belt drive produced) Comprehensive strength of circular section. Value of 3, bearing temperature when using this point A measurement, the bearing temperature allowed value is: low rolling bearing ( The environment temperature & lt; 40 ℃) ：95℃。 Low sliding bearing: 80 ℃, and at the same time for the oil temperature & le; 65℃。 （ Article source: motor technology, refs)