'Seven characters to prevent rolling bearing internal damage test'

Prevent rolling bearing test 'and' seven words 2018 - internal damage 08 - 28 no railway wagon axle box double row tapered roller rolling bearing is an important part of a railway vehicle and the vehicle in use, because of the high speed, big load, conditions and alternating stress, makes some parts of the rolling bearing abrasion, looseness, deformation, corrosion crack happens, wreck wait for a phenomenon. The failure will directly endanger the train running safety, light person can cause delays and midway uncouple, the person that weigh can cause vehicle derailment and train subversion and other major fault, the country and people's life and property losses. Early detection in the use of rolling bearing failure, properly handle, in order to ensure the safety of train operation. Through the appearance of the rolling bearing internal serious breakage phenomenon, train the inspectors induces the appearance of five kinds of common characteristics. Through five appearance characteristics found in rolling bearing no temperature, infrared hot box without serious breakage under the condition of internal fault checking method, namely 'hear, see, touch, twist, turn, diagnosis, guide' seven words check method. 1, listen to: enter the part inspection car on the train, in train to facial Angle into the direction of the car (on both sides With the rail & 45 deg; ） To squat down depending on the car. Listen carefully wheel with or without vibration and rolling bearing any abnormal sound, the wheel vibration and rolling bearing is different when the sound of the vehicle as a skill check. Especially when the train stopped again and again to pull to the wheel to the vibration appearance have dumped oil phenomenon of bearing or bearing, hear carefully whether bearing internal roller bearing binding or smashed into each other's voice sound of friction. If the rear part inspection car found the front of the train vehicle vibration, bearing a different sound, to contact team train attendant. Train team attendant, promptly notify the relevant section inspection car. Part 2, see: inspection car on the train for technical checking, to check whether there is any scratch on the wheel, stripping, owe loss or paste. Anything that fault of rolling bearing the wheel vehicles will not easily let go. At the same time bearing appearance check carefully. The shaft end bolt looseness, missing, seal cover and the bearing cover before or after the block have dumped oil, jilt whether the oil in the car floor bolsters and side frames, and the wheels on a board, oil is a blond, whether a dot. 3, touch: the wheel tread defective or dumped oil, and other appearance has a different shape of rolling bearings bearings must fingerprint coat check whether normal temperature, high temperature check point temperature meter was used to measure. 4, twist: to have dumped oil phenomenon of rolling bearing, to hand twist oil state. Bearing internal damage failure, throw the grease in silver. Hand twist grease granular metal powder. This is the important basis of judgment rolling bearing internal serious damage. 5, turn: 'hear, see, touch, turn a rolling bearing fault features, must be originally drafted in 360 & deg; Positive and negative rotation, listen carefully in the process of turning bearing internal presence of abnormal sound, feel any abnormal vibration, have positive and negative rotation without card lag phenomenon. Especially for bearing internal have abnormal sound to hear carefully whether between roller and roller in the sound in the process of rotation. Early when cage damaged window beam damage is less, in the process of the rotational bearings only have roller sound in a certain place, and the sound is when moving to the highest roller, the cage positioning mechanism after the voice of the whereabouts of the impact roller. If there is the phenomenon that the bearing cage broken serious breakage or broken roller rolling bearing internal fault. 6, diagnosis: for rolling bearings with different shape, must pass inspection car, foreman collective consultation and related professional technical management personnel to judge, consultation within the bearing fault can be located, inform team train attendant buckle car processing, inspection workshop has no right to open check. Gentlemen: 7, buckle after repair vehicles rolling bearing internal serious damage, workshop to inform operation department, organized by engineering department to check. Deciding whether to open check at the same time, open the wheel must change of rolling bearing, wheel processing, to confirm the internal decomposition of the rolling bearing has serious damage identification, determine its damaged parts and damage degree, and make appraisal record. Using the 'seven words test check the judgment internal fault rolling bearing, the key to do:' hear, see, twist and turn ' 'to' is wheel with or without vibration of rolling bearings, bearing the first step to have no sound, is found ahead of rolling bearing fault symptoms of serious breakage internal necessary method. 'look at' is the basis of the serious breakage found rolling bearing internal fault, through inspection car part examined to find the appearance of the rolling bearing bush in internal damage anomaly. 'twist' oil check is whether bearing internal important method, there are serious damage hand twist oil containing iron powder, which is bearing the important basis of internal damage. 'turn' is the validation of rolling bearing failure extent of internal damage, the most effective method by rotating bearing check, if there is a roller in the roller between the impact of abnormal sound or card lag phenomenon, further explained the rolling bearing is internal fault, if the roller and roller impact at more then keep the damage on the window frame beam. By 'hear, see, twist and turn found the obvious appearance of the rolling bearing internal damage symptoms, is an important way to prevent rolling bearing of internal damage.