Weifang 250 kw generator bearing temperature too high knowledge of the reason and repair method, the bearing

Weifang 250 kw generator bearing temperature is too high the reason and repair method 1, lubricating oil is not clean in the face of the method: change the lubricating oil. 2, shaft bending, the center line is not allowed. Approach: find center again. 3, in the ball or roller bearing damage. Response: replace new bearing. 4, base screw loose. Response: tighten the foundation screw. 5, lubricating oil use time is too long, not replaced. Response: wash bearing, oil change. Diesel generator set with the bearing can be roughly classified into three kinds, namely: bearing is analyzed. studying yaw bearings, bearings, transmission system, Spindle and gearbox bearing) 。 A, materials. The current standard is analyzed. studying yaw, material selection of bearing ring 42 crmo, heat treatment using overall conditioning treatment, after tempering hardness is 229 hb - 269 hb, raceway part adopts surface quenching, quenching hardness of 55 HRC - 62HRC. Due to the force of the wind turbine yaw, is analyzed. studying bearing is complex, and the impact of the bearing and the vibration is larger, therefore, request bearing can withstand the impact, and can bear larger load. This bearing ring matrix hardness of hb - 229 269 hb, able to withstand shocks without plastic deformation, and part of raceway surface quenching hardness of HRC - 55 62 HRC, can increase the contact fatigue life, so as to ensure the use requirement of bearing long life. Second, the impact energy at low temperature. Current standards for yaw, paddle wheel bearing ring low-temperature impact energy requirements: - 20 ℃ Akv should not less than 27 j, under the cold Akv value can be negotiated with the user. Generator may work in extremely cold area, the bearing under the condition of low temperature must be able to bear the impact load of big, therefore, request of bearing ring material after the tempering process must be low temperature impact test, take the part of the bearing ring to make sample or is the same as the ring the same performance and heat treatment under the condition of sample. Third, bearing ring gear. As a result of the diesel generator set, the transmission accuracy is not high, and the gear ring diameter is larger, module of gear is bigger, therefore, the general requirements of gear precision grade according to GB/T10095. 2 - — The magnitude 9 or 10, 2001. But due to the work condition between pinion and ring gear bearing impact, therefore, bearing ring gear tooth surface quenching, small gear tooth surface hardness is generally in the 60 HRC, considering the life such as design, big gear tooth surface quenching hardness for not less than 45 HRC. 4, anticorrosive processing. Generator equipment work in the field, and yaw, part of the blade bearing is exposed outside, will be affected by air pollution and high humidity environment may also be corrosion bearing matrix, therefore, bare outside of yaw and change the blade bearing parts of the requirements for surface anti-corrosion treatment, generally USES galvanized processing. According to the needs, on the outside of the zinc coating to brush paint protection. More than 15 kw diesel generator set electric ball mostly adopted by the single bearing. Generator bearing front because of its high load, high speed is generally adopted a large single row deep groove ball bearings and double row deep groove ball bearing, the back-end using single row deep groove ball bearings.