毕业设计毕业论文四点接触球轴承的设计.doc

四点接触球轴承的设计、主要加工工艺分析及其对装配误差的影响 摘 要 四点接触球轴承为分离型轴承，是一套可以承受双向轴向字和的角接触球轴承。其内圈和外圈呈桃型截面，在无载荷和纯径向载荷作用时，钢球与套圈呈四点接触，在纯轴向载荷作用下，钢球与套圈为两点接触，可承受双向轴向载荷。该种轴承还可以承受力矩载荷，兼有单列和双列交界处球轴承的功能。此种轴承只有形成两点接触时才能保证正常工作。但一般适用于纯轴向载荷或轴向载荷大的合成载荷下呈两点接触的场合，这种轴承极限转速高，适合高速运转场合。 四点接触球轴承的内圈(或外圈)由两个半圈精确拼配而成，而其整体外围(或内圈)的沟曲率半径较小，使钢球与内、外圈在四个“点”上接触，既加大了径向负荷能力，又能以紧凑的尺寸承受很大的两个方向的轴向负荷，并且有很好的两个方向的轴向限位能力，因为它的轴向游隙相对较小，而其接触角(一般取为35°)又较大．这种轴承的允许转速也很高，并且运转平稳，其双半圈又可从整套轴承中取下分别进行安装，这种轴承多用在发动机中，在较高的转速下承受很大的径向负荷和轴向负荷。 轴承的装配与检验对轴承的性能影响很大，所以，本文对轴承装配的一般工艺过程、轴承零件的检验方法和接触角的测量设备做了分析，并重点分析了接触角的变化对轴承性能的影响。 关键词:设计， 加工, 工艺， 装配, 检验 Four contacts the ball bearing the design 、the main processing craft analysis and to the installation error influence ABSTRACT Four contact ball bearings for the separation-bearing, is a two-way can withstand axial words and the angular contact ball bearings. Its inner and outer rings were peach-shaped, in the absence of pure radial loads and loads, and the ball was four Ring contacts in pure axial load, Ball and Ring of two contacts, affordable two-way axial load. Bearing the species can withstand torque load, both separate and double row ball bearings junction function. Bearing such contacts only form two am to ensure normal work. But generally applicable to the pure axial load or axial load of synthetic load was two contacts occasions, Bearing such high speed limits, suitable for high-speed operation occasions The circle (or the outside lane) matches for but becomes the inner contacting ball axle bearing at 4 oclock from two enclosing a precise partly being ready to risk selfs life, the ditch curvature radius that whose overall outer-ring (or inner marks with a circle) is less but , make steel ball get in touch with the inner , the outside lane in four on , now that have enlarged radial direction load ability, can `bear with compact dimension very axial two direction load, and the axial position-limit ability having very good two direction,Because of its axial end play is relatively less, but the p