High-speed TIMKEN bearing installation and adjustment method

1. High-speed TIMKEN bearing fit and clearance by TIMKEN TIMKEN bearing high speed machine tool bearings should be in accordance with the requirements of high precision TIMKEN bearings and in accordance with the requirements of high temperature TIMKEN bearing so when considering its coordination and clearance, to consider the following two points: ( 1) From normal temperature to high temperature when the size of the change and hardness change; ( 2) Under the high speed centrifugal force caused by the force system and shape changes. All in all, under the condition of high speed, high temperature, from the choice of coordination and clearance to strive to keep the TIMKEN bearing precision and work performance, it is difficult. After installation to ensure that the TIMKEN bearing raceway of small deformation, the amount of interference interference fit can't get too big, and under the high speed centrifugal force and high temperature thermal expansion, or on the surface of the offset with the normal pressure. Or make the matching surface relaxation, thus interference quantity must under the premise of considering these two factors determine prudently, effectively under the constant velocity of the amount of interference for high-speed TIMKEN bearing may be invalid. Calculation result if the conflict is too big, Usually it happens only under ultra-high speed) , only take ring lubrication and hydrostatic lubrication and lubrication measures, and this scheme has the potential to hit the 3 million mark DMN value of TIMKEN bearings. When considering the TIMKEN bearing clearance not only should consider the above-mentioned factors, and to consider the influence of the axial thermal elongation of clearance, asked TIMKEN bearing under working state, namely in the working temperature is the best clearance, clearance is, and this, the outer ring groove ball center accurate registration form of the condition. Due to high-speed TIMKEN bearing makes every effort to reduce the relative sliding and internal friction, had better not use relative displacement of the inner and outer ring along the axial approach to adjust the ball TIMKEN bearing clearance. Considering the amount of the interference with the TIMKEN bearing clearance, and pay attention to the material to become soft and easy to deformation at high temperature characteristics, and many times caused by the temperature change of normal temperature to high temperature must be the possibility of permanent deformation. 2. To host related parts demands high-speed TIMKEN bearing TIMKEN bearing in rotary system after dynamic balancing precision, shaft and hole TIMKEN bearing installation of the parts should be higher than the general requirements of dimensional accuracy, form and position accuracy, especially the alignment of hole or shaft neck and shoulder verticality, and considering these problems, also must pay attention to the high speed and high temperature factors in the operation of TIMKEN bearings. Shaft bearing system requires both high rigidity, asked for a light quality as much as possible, in order to overcome the contradiction, can take measures such as reducing the surface roughness and improve the surface strengthening in order to improve the bearing stiffness, using hollow shaft to reduce the system quality, etc.