耦合作用下涡旋动盘形变与应力的仿真分析

运用有限元分析软件ANSYS,分析了在特定气体载荷与温度载荷耦合作用下涡旋齿的形变与应力的变化,并在气体、温度载荷变化的情况下,研究其形变的变化规律。被压缩的气体对涡旋齿产生气体力载荷,由气体被压缩、动静盘间的摩擦产生的温度载荷,会引起动盘的热变形与热应力。分析结果表明,温度载荷是影响涡旋齿变形的主要因素。由于涡旋齿头部位受到气体力最大、温度最高,耦合作用下涡旋齿最大变形发生在涡旋齿头顶部;由于主轴对轴承孔内壁的约束作用,最大应力发生在主轴承孔内壁与底盘接触的部位。

Deformation and Stress Simulated Analysis of Orbiting Scroll Under the Coupling Function

The stress and strain of orbiting scroll under the both specific and different coupling field of temperature and gas forces are simulated by using ANSYS software. The change rule of stress and stain is obtained. The compressed gas force on the scroll wrap. By the temperature force produced by the compressed gas and the scroll plates friction, it can cause the thermal deformation and thermal stress of the orbiting scroll. It indicated that the stress and strain of orbiting scroll are mainly affected by the temperature field. The greatest deformation occurs in the tooth head of scroll wrap because of the largest gas forces and the highest temperature on tooth head of scroll wrap. Due to the effect of constraint of the main shaft of bearing hole wall, the max stress focuses on the bottom of tooth head of scroll wrap and the inter rim of bearing.