摘要
采用理论分析与有限元模拟相结合的方法对预应力钢丝缠绕液压缸关键技术参数进行了研究。将钢丝层简化为单层厚壁圆筒,建立1/4双层圆筒的平面应力轴对称有限元模型,钢丝层施加不同预紧力,得到外压随钢丝层厚度变化的曲线,可确定缠绕应力和钢丝层厚度。建立了参数化6层钢丝缠绕缸筒的1/4平面轴对称应力有限元模型,以不同预紧力递减增量进行遍历计算,以最终钢丝层对缸筒外壁压力的设计值为依据选择合适的钢丝层初始缠绕应力和预应力递减增量。最终确定了预应力钢丝缠绕缸筒关键技术参数,根据这些技术参数设计制造了内压为80 MPa的50 MN液压缸。
The key technical parameters of prestressed steel wire wound hydraulic cylinder were studied by theoretical analysis and finite element method. Then,a single layer thick wall cylinder was simplified as the steel wires,and 1 /4 of the double cylinders plane stress xisymmetric finite element model was established. Therefore,the curves of changing thickness of the steel wire layers were obtained through applying different pre-tightening forces in the steel wire,and the wound stress and thickness of the steel wire layers were confirmed. Furthermore,1 /4 axisymmetric parametric plane stress finite element model of six layers steel wires wound cylinder was built,and the right initial wound stress and prestress reduction increments were chosen by traversal calculation in the reduction of different pre-tightening force increments and the final pressure setting on the external wall of the cylinder which generated by pre-tightening steel wires. At last,the key technology parameters of prestressed steel wire wound cylinder were determined,and the hydraulic cylinder 50 MN with internal pressure80 MPa was designed and manufactured according to the above technical parameters.
出处
《锻压技术》
CAS
CSCD
北大核心
2017年第2期93-99,共7页
Forging & Stamping Technology
关键词
预应力钢丝缠绕液压缸
缸筒
重型液压机
超高压
切向应力
预紧力
prestress
steel wire wound
hydraulic cylinder
cylinder
heavy hydraulic press
ultrahigh pressure
tangential stress
