中文摘要：

以游梁式抽油机皮带减速箱传动系统为研究对象,综合考虑皮带与减速箱传动系统的弹性,建立游梁式抽油机皮带减速箱传动系统有阻尼多自由度扭转受迫振动的力学与数学模型及各振动元件参数的计算模型;以传动系统扭转振动仿真结果为基础,建立皮带减速箱及皮带瞬时传动效率的仿真模型.分析影响皮带减速箱传动效率的因素.仿真结果表明：传动系统的扭转振动对系统的运动规律与动态参数有显著影响;系统瞬时传动效率并非常数,受曲柄扭矩影响较大,特别是在正负扭矩换向点附近瞬时效率显著降低;传动系统的扭转振动降低了皮带减速箱的传动效率.皮带减速箱平均传动效率的仿真结果为70％ ～ 82％,与实际测试结果吻合.

英文摘要：

Taking account of the elasticity of belt and gearbox transmission system, the mechanical and mathematical modelsof damping and multi-degree of freedom torsion vibration system were established for the case of the belt and gearbox trans-mission system of beam pumping unit. The computing models of the oscillatory components were developed. The instantane-ous efficiency of the belt and gearbox system was established on the basis of the simulation result of the torsion vibration. Theaffecting factors of the efficiency of the belt and gearbox system were analyzed. The simulation results show that the motionlaw and dynamic parameters of the system are significantly influenced by the torsional vibration of the driving systems. Theinstantaneous transmission efficiency of system is not a constant, which is influenced by the load torque. The instantaneousefficiency decreases significantly particularly in the area where the direction of load torque changes under the action of bi-di-rectional alternating load. The efficiency of the belt and gearbox transmission system is reduced by the torsional vibration ofthe driving system. The simulated mean transmission efficiencies of the belt and gearbox transmission system are from 70% to 82%, which agree well with the test results.