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Rolling bearing temperature
Source: China Bearing Network Time: 2013-10-30
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1. Bearing load; 2. Bearing speed; 3. The conflicting moment of the bearing; 4. The type and viscosity of the smoothing agent and the amount of smoothing agent; Bearing installation / bearing housing depiction; 6. Working environment system temperature:
Cooling speed › T ‹ heating speed?
Most bearing applications; temperature levels are relatively low; because:
1. Lighter load / lower speed ------- lower heat rate 2 . The air around the bearing is active; the metal between the collars has a satisfactory heat transfer ------- the ability to conduct heat:
Conflict power consumption: Hf=1.047X10-4nM (M collision torque)
About high-speed bearings; partial heat generation rate of sliding in each touch zone: Hfj=(∫vkdFkj)/J
(J unit conversion coefficient (Nm/s→W) vk is the sliding speed weight in the direction of the conflicting torque increment dFk. The heat generation rate of each rolling body and the inner and outer road spins: Hfj=(∫ωsjdMsj)/J
Rolling bearing conflicts Rolling bearing conflicts:
1. The elastic lag 2 in the roll. The slip of the tumbler raceway touch caused by a few shapes of the touch surface. Sliding 4 caused by deformation of the touch body. Adhere to the sliding between the frame and the roll; and the support frame for the rim guide; and the slide between the frame and the ferrule. The rollover conflicts with the stickiness of the smoothing agent on the shelf. Sliding between the end faces of the rollers and the ribs of the inner and outer rings. Seal conflicts clarify:
1. The elasticity lags behind the force data and the unit load on the touch surface. Rolling and deformation---the front part of the touch area is arched; the rear part is collapsed; additional tangential force is required to overcome the resistance of the arching data. Persistence of the guiding method: the inner ring rib guides the IRLR, the ball guides the BR, and the outer ring rim guides the ORLR
4. The conflicting force of the bearing seal is generally significantly greater than the other types of conflict force sum and the frame dynamics:
Under high speed or large acceleration conditions; the magnitude of the transient effect of the frame will be large; it needs to be accounted for:
1. Adhere to the impact and collision forces on the interaction surface between the frame and the roll. Adhere to the normal force and the conflicting force of the ferrule and the ferrule to guide the rim touch surface (the rib guide)
3. Stick to the force caused by the unbalanced mass center. Gravity 5. Stick to the inertial force of 6. Other forces (adhere to the smoothing agent's viscous conflict force and smooth grease mixing force)
The moment of friction of the bearing is the moment caused by the applied load M1=f1 Fβ dm
Where f1 = z(C0/Cs)|y during which x, y and bearing type; nominal touch angle is related to viscous collision moment Mv=10|-7f0(v0n)|1.5dm|3 v0n>=2000
Mv=160*10|-7f0dm|3 v0n>=2000
F0 bearing type; smooth method for k0 smooth grease base oil kinematic viscosity roller bearing roller and rib collision torque Mf = ff Fa dm
Therefore: Total conflict torque M=M1+Mv+Mf
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