Jiaxing bearing group co. , LTD. : rolling bearing temperature rise influence factors

There is rotational, have HRB bearing ( ) Jiaxing bearing group co. , LTD. : rolling bearing temperature rise influence factors. Jiaxing bearing group sales co. , LTD. ( The company) Is bearing group co. , LTD. Established in jiaxing spot sales window, specializing in HRB brand bearings, existing stocks of 50 million yuan, covers the whole bearing, have very strong cash supply ability. 1 introduction in the process of the rolling bearing operation temperature is one of the important index to measure the quality of bearing, this article on the analysis of the influence factors of temperature rise are discussed in this paper, for readers reference. Structure design to the influence of the temperature rise of 2. Rolling body shape and the number is usually 1 ball bearings operating temperature lower than that of roller bearings, but the greater the ball bearing load, the higher the temperature, the operation temperature of the roller bearing is not sensitive to load increase. The same conditions, less number of roller temperature rises high, this is because the same load, the small roller, roller load increases, the contact surface elastic deformation increases, the increase in the amount of friction torque. The greater the load, this tendency is more significant. 2. 2 keep frame shape and material cage shape which stirring lubricant. Bearing high temperature, related to the amount of lubricant, lubrication dose had no effect on youth. Without cage bearing operating temperature is higher than commonly have cage bearing, speed, the higher the stronger this tendency. No cage prone to rolling element bearing the irregular movement, but if guarantee clearance, also can be the same as the general with the bearing cage speed. Stamping shape maintains a generally guided by rolling body, often operating temperature is lower than that of the car maintains a ring made type guide, frame system to keep the weight of the heavier than punching cage, thus lead to the sliding friction is big, high temperature rise. Ring the guided the cage form, usually led by the outer ring than the inner ring of guide bearing temperature rise is low, this is due to the high speed under the action of centrifugal force, the lubricant into outer raceway, outer surface, the inner ring guide surface in boundary condition. The lighter car made form cage materials, the lower the temperature rise. Polymer materials keep than brass keep operating temperature is low. Maintains a temperature rise of copper alloy is lower, this is due to the copper alloy running-in and sliding surface is very difficult to appear off the oil. In addition the plating maintains a low operating temperature, it can reduce the guide surface sliding friction, very suitable for high-speed bearing. 3 installed on the influence of the temperature rise of 3. 1 preloaded positioning preloaded tapered roller bearing, due to the guard and the end of the roller running-in decrease preload, so bearing running one period of time, the temperature fell accordingly. Preloaded increase when the temperature rising sharply preloaded, the greater the amount of roller and guard running-in caused by temperature drop is particularly significant. The surface roughness is coarse, running-in caused preloaded to decrease more. Constant pressure preload, even produce running-in, bearing clearance, Preloaded) And the actual level of axial load and no change, therefore, bearing temperature being constant. 3. 2 clearance, when the rolling bearing starts early temperature is quite high, after reaching a certain value, gradually reduce and stabilize the temperature, because the bearing inner ring friction heat when we started running higher than outer ring, inner ring expansion speed is faster than outer, running clearance is smaller than the residual clearance. To continue operation due to the heat dissipation effect makes the temperature of the inner and outer ring is relatively stable, running clearance is stable, for the most part bearing movement in the first 5 min ~ 6 min can judge whether there are abnormal temperature rise. With the decrease of the running clearance, rolling bearing operating temperature drop and low, when the clearance to further reduce the negative clearance ( Preloaded state) When the temperature will be increased dramatically. Running clearance increases when temperature increases, this tendency is due to the load to reduce the number of roller, roller rolling contact area increases, the increased contact surface sliding friction. Besides running clearance is big, easy to produce irregular movement increase rolling element and cage sliding friction, thus produce the bearing temperature rise. 3. 3 lubrication in general use, mainly affect the use of the rolling bearing temperature range is lubricants and lubrication way, no matter how, lubricant, lubrication way will form the necessary lubrication film on surface of the movement, and is the main factor of forming oil film viscosity, light load operation of high-speed bearings should choose low viscosity of lubricant, the occasion of low speed and heavy loading should choose high viscosity of the lubricants. It is because of the low viscosity of lubricant, can not be formed in the contact region enough oil film thickness, lubricant viscosity high will produce sharp temperature rise due to internal friction. Too little lubricant cause insufficient lubrication, overheating, lead to keep early wear, ring raceway and rolling body annealing and damage; Too much lubricant can produce eddy current, ambassador rapid temperature rise due to friction. 4 conclusion along with the rapid development of science and technology, the dn value of rolling bearings is improved, and improve the rolling bearing at work is the key to improve the speed of temperature rise, therefore whether bearing manufacturing enterprise, or the application of bearing unit, should according to different product structure, the use of different operating mode, from the key factors that affect temperature rise, to improve the service life of bearing. 24-hour customer service hotline: if you are more interested in jiaxing bearing group company introduces industry information or have any questions, please click on contact us page on the right side of the online customer service, or call:, you close the way of jiaxing bearing purchasing advisors. - - - - - - Editor: HRB bearing company sourcing consultant LTD. 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