基于实际间隙与布尔运算的变螺距转子建模及其平衡

Modeling and Balancing of Variable Pitch Screw Rotor Based on Actual Clearance and Boolean Operation

变螺距转子计算得到的理论允许最小间隙,利用SolidWorks软件的布尔运算功能,对转子的每个面单独做切削处理,建立了含有实际间隙的变螺距转子的三维模型。在此基础上,在变螺距转子的进、排气端面内部与转子的外圆端面去重处理,消除转子高速运转中的动不平衡效应,得到了可用于加工的实际变螺距转子。对导程小导致齿厚较薄的转子,在SolidWorks软件中将其凹面与齿根面相交处的小圆角增大至设备可加工的数值并保证其间隙合理,不会卡死。

The minimum clearance is calculated based on the theory of variable pitch rotor, and each face of the rotor is separately cut using the Boolean operation function of SolidWorks software.A 3 D model of variable pitch rotor with actual clearance is established.Based on this model, the rotor inlet and exhaust end faces and the rotor external round faces are reprocessed to eliminate the dynamic unbalance effect of the rotor in high-speed operation.For rotors with small lead resulting in thin teeth, the small round angle at the intersection of the concave surface and the tooth root surface is increased to the machined value of the equipment in the SolidWorks software to ensure that the clearance is reasonable, and rotors will not get stuck.