Shaft bearing parts on the shaft connection technology

Even bearing parts on the shaft axis connection technology in the ultra-high speed motorized spindle, because of the progress of speed, so dynamic balance for shaft parts request is very high. Bearing and spindle unfavorable choose thread connecting the positioning of the component, the motor rotor and spindle is unfavorable choose key cohesion, and throughout with detachable ladder interference. This kind of cohesion and screw thread connection is more has the significant advantages: (1) not twists and turns and changes in the axis stress, has no effect on the axis of rotation accuracy. (2) easy to ensure parts with straight axis positioning end degrees, when bearing preload will not affect the bearing to bearing uneven stature; (3) interference set of uniform quality, the spindle dynamic balance is easy to get to ensure; (4) usually use hot device based on the set of method and way to open it in written to the pressure oil, spindle no harm; (5) positioning, can advance the spindle stiffness. Conclude that ladder set the fundamental interference quantity, in addition to outside interference quantity according to the load calculation, also need to consider the following elements across full cohesion strength: the influence of the roughness of cooperation appearance; (2) to connect a work temperature and the temperature difference between the installation, as well as the main shaft and a full set of data the difference between the linear expansion coefficient; (3) high-speed spindle rotates, interference by the centrifugal force will cause interference of inner hole enlargement, causing interference quantity reduction, when the main shaft data and interference of mooring Song ratio and elastic modulus and density were similar, the amount of interference is proportional to the square of the revised and the spindle speed, for example, when a cooperation a diameter of 66 mm, the spindle hole is 25 mm, interference of outside diameter for 134. 2 mm, torque of 85 nm, the speed of 1000 r/min, the rolling code SKF bearing the structure of the centrifugal force caused by interference quantity value is only 0. 096? 吗? m； And when the rotating speed of 18000 r/min, the value can be up to 31. 199? 吗? m； (4) the repeated loading and unloading will cause interference quantity decrease; (5) LianXiMian form, the influence of the public servants to over surplus quantity, etc. Interference fit set of completion of the over surplus quantity of the ladder there are two ways: (1) the use of public servants to complete cooperation, on the basis of the calculated value of the fundamental interference quantity and nominal scale for cooperation, and check the relevant manual chart, the interference of the cooperation; (2) use the ladder cooperation nominal scale difference to complete, and choose the transition of H4 / H4 cooperation, this method is simple manipulation and ensure that the amount of the actual interference of cooperation, cooperation and is suitable for high precision parts standardization, seriation production. On a: auto water pump shaft bearings how to remove the next article: how auto water pump work? Auto water pump bearing manufacturer for you to solve related tags: shaft bearing, axis bearing, axis related news even bearing fault even how to recognize the pump shaft bearing radial clearance original water pump bearing vest in non-standard axle even even bearing shaft bearings is to simplify the bearing of double bearing even auto water pump shaft bearing is an important part related products