首页|工况对双螺杆混输泵振动特性影响实验

工况对双螺杆混输泵振动特性影响实验

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  • 国家科技期刊平台
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为研究工况对双螺杆混输泵振动特性的影响,搭建双螺杆混输泵多通道振动测试系统,测试并分析不同含气率、转速及出口压力下混输泵振动参数.结果表明:排液开始时排液腔瞬时打开诱发射流,射流向竖直向的泵出口偏转从而产生压力脉动并诱发振动,导致泵竖直方向振动加速度有效值高于水平方向和轴向;含气率为7.5%时振动加速度有效值为纯液工况时的1.88倍,随着含气率进一步升高测量值降低;而含气率大于20%时,振动有效值继续升高.在转速为1 450 r/min时y方向振动加速度有效值是850 r/min时的2.95倍;振动加速度有效值随出口压力变化较小.当转速由850 r/min升高至1 450 r/min时,径向垂直方向振动加速度主频由75fn移动至50fn.研究可为提高双螺杆混输泵运行稳定性提供指导.
Experiment on the Influence of Operation Conditions on the Vibration Characteristic of a Twin-screw Multiphase Pump
In order to study the influence of operating conditions on the vibration characteristic of the twin-screw multi-phase pump,a multi-channel vibration test system is established to test and analyze the vibration parameters of the pump un-der different inlet gas volume fraction(IGVF),rotational speed and outlet pressure.The results show that at the starting of discharge,the transient opening of the discharge chamber causes the jet flow,and then the jet flow deflects toward the verti-cal direction,which produce pressure pulsation and vibration.This process makes the effective value of vibration accelera-tion in the vertical direction of the multiphase pump higher than that in the horizontal and axial directions.For the IGVF of 7.5%,the effective value of the vibration acceleration is 1.88 times of the pure liquid condition.As the IGVF increases,the effective value of the vibration acceleration decreases.When the IGVF is greater than 20%,the vibration acceleration in-creases continuously with the increase of IGVF.The effective vibration acceleration value in the y-direction at speed of 1 450 r/min is 2.95 times of that at 850 r/min.The effective value of vibration acceleration changes little with the outlet pres-sure variation.When the rotational speed increases from 850 r/min to 1 450 r/min,the main frequency in the radial vertical direction shifts from 75fn to 50fn.This study provides a guidance for improving the operation stability of the twin-screw mul-tiphase pump.

vibration and wavetwin-screw multiphase pumpoperating conditionsvibration parametervibration ac-celerationfrequency domain analysis

孙帅辉、武鹏波、南海鹏

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西安理工大学 西北旱区生态水利国家重点实验室,西安 710048

振动与波 双螺杆混输泵 运行工况 振动参数 振动加速度 频域分析

国家自然科学基金陕西省自然科学基础研究计划联合基金清洁能源与生态水利工程研究中心项目陕西省高等学校青年创新团队项目

518390102021JLM-55ONZX-2019-052020-29

2024

10.3969/j.issn.1006-1355.2024.03.046

噪声与振动控制
中国声学学会

噪声与振动控制

CSTPCD北大核心
影响因子：0.622
ISSN：1006-1355
年,卷(期)：2024.44(3)
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