CAJ | 학술논문

电磁阀自激振动将造成气动系统工作不稳定,同时也是系统的主要噪声源之一.为了获得电磁阀在不同工作条件下自激振动特性,对气动先导式电磁阀自激振动进行数值与试验研究.建立电磁阀阀芯振动与流体流动相耦合的动力学模型,模型得到试验验证.获得不同工作压力、工作流量时电磁阀工作状态,讨论电磁阀结构参数对自激振动的影响.结果表明,当工作压力、工作流量较小时,系统平衡点不稳定,电磁阀在经受任意微小扰动时就将产生"软自激振动".随着工作压力、工作流量的增加,电磁阀将依次出现软自激振动、硬自激振动、稳定工作三种状态.增加电磁阀阀口直径d_b、降低阀口直径d_a、弹簧预压缩量z_0和阀芯半锥角(将提高电磁阀的抗扰动能力,扩大电磁阀的稳定工作范围.
전자벌자격진동장조성기동계통공작불은정,동시야시계통적주요조성원지일.위료획득전자벌재불동공작조건하자격진동특성,대기동선도식전자벌자격진동진행수치여시험연구.건립전자벌벌심진동여류체류동상우합적동역학모형,모형득도시험험증.획득불동공작압력、공작류량시전자벌공작상태,토론전자벌결구삼수대자격진동적영향.결과표명,당공작압력、공작류량교소시,계통평형점불은정,전자벌재경수임의미소우동시취장산생"연자격진동".수착공작압력、공작류량적증가,전자벌장의차출현연자격진동、경자격진동、은정공작삼충상태.증가전자벌벌구직경d_b、강저벌구직경d_a、탄황예압축량z_0화벌심반추각(장제고전자벌적항우동능력,확대전자벌적은정공작범위.
Self-excited vibration in solenoid valve is one of the noise sources and it will cause unstable working of pneumatic system. In order to study self-excited vibration in solenoid valve under different working conditions, the vibration is studied numerically and experimentally. A dynamic model coupling vibration of solenoid valve with fluid flow in valve is developed. The model is validated by experimental results. Working state of the system, effects of structural parameters are discussed. A review of the numerical results obtained indicates that for low working pressure and small working flow rate, the equilibrium point of the system is unstable, "soft self-excited vibration" occurs due to infinitesimal disturbances. The solenoid valve undergoes soft self-excited vibration, hard self-excited vibration, with the increase of supply pressure or supply flow rate leading to stable working. Increase in d_b and decrease in d_a, z_0, ( will improve anti-disturbance capacity and enlarge stable working region of the solenoid valve.