井下涡轮发电机轴系减振阻尼器设计与分析

TE921; 提出一种新型阻尼器以减小基础激励下发电机的轴承力,该阻尼器由周向油膜的挤压效应与端面节流流道的节流效应协同产生阻尼,端面节流流道采用特斯拉阀结构,具有一定单向导通性,既可产生正向阻尼,又可减小油液反流阻力,缓解油膜空化问题;采用内置密封储油腔,整体结构紧凑.对阻尼器结构进行设计,采用数值方法研究阻尼特性及减振性能.结果表明:阻尼系数总体上具有一定非线性,但在低速低频区具有良好的线性度;阻尼器显著减小基础摆动产生的惯性载荷,与未安装阻尼器的对照组相比,径向轴承力下降至 53.51%,支撑刚性下降至 0.038倍,轴系径向振动位移和速度增长至 14.63 倍,但二者之积仍小于 1,说...

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Published in中国石油大学学报（自然科学版） Vol. 48; no. 2; pp. 186 - 193
Main Authors 姚本春, 张仕民, 谈建平, 张金泽, 田朕, 范进朝
Format Journal Article
LanguageChinese
Published 中国石油大学(北京)克拉玛依校区工学院,新疆克拉玛依 834000%中国石油大学(北京)机械与储运工程学院,北京 102249%中国石油大学(北京)克拉玛依校区工学院,新疆克拉玛依 834000%中国石油集团工程技术研究院有限公司,北京 102206 01.04.2024
中国石油大学(北京)机械与储运工程学院,北京 102249
Subjects
vibration attenuation
Tesla valve
downhole turbine generator
单向导通性
damper
阻尼器
one-way conductivity
减振
井下涡轮发电机
特斯拉阀
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Abstract TE921; 提出一种新型阻尼器以减小基础激励下发电机的轴承力,该阻尼器由周向油膜的挤压效应与端面节流流道的节流效应协同产生阻尼,端面节流流道采用特斯拉阀结构,具有一定单向导通性,既可产生正向阻尼,又可减小油液反流阻力,缓解油膜空化问题;采用内置密封储油腔,整体结构紧凑.对阻尼器结构进行设计,采用数值方法研究阻尼特性及减振性能.结果表明:阻尼系数总体上具有一定非线性,但在低速低频区具有良好的线性度;阻尼器显著减小基础摆动产生的惯性载荷,与未安装阻尼器的对照组相比,径向轴承力下降至 53.51%,支撑刚性下降至 0.038倍,轴系径向振动位移和速度增长至 14.63 倍,但二者之积仍小于 1,说明支撑刚性下降导致的轴系振动位移增长趋势被抑制,轴系得以有效减振.
AbstractList TE921; 提出一种新型阻尼器以减小基础激励下发电机的轴承力,该阻尼器由周向油膜的挤压效应与端面节流流道的节流效应协同产生阻尼,端面节流流道采用特斯拉阀结构,具有一定单向导通性,既可产生正向阻尼,又可减小油液反流阻力,缓解油膜空化问题;采用内置密封储油腔,整体结构紧凑.对阻尼器结构进行设计,采用数值方法研究阻尼特性及减振性能.结果表明:阻尼系数总体上具有一定非线性,但在低速低频区具有良好的线性度;阻尼器显著减小基础摆动产生的惯性载荷,与未安装阻尼器的对照组相比,径向轴承力下降至 53.51%,支撑刚性下降至 0.038倍,轴系径向振动位移和速度增长至 14.63 倍,但二者之积仍小于 1,说明支撑刚性下降导致的轴系振动位移增长趋势被抑制,轴系得以有效减振.
Abstract_FL A new type of damper was proposed to reduce the bearing force of the generator under the basic excitation,in which the damping is generated by the squeeze film effect of the circumferential oil film and the throttling effect of the end throttling flow channel.The end throttling flow channel adopted the Tesla valve structure,which has a certain one-way con-ductivity.It can not only generate forward flow damping,but also reduce the oil reflux resistance and alleviate the cavitation of oil film.Meanwhile,the damper employed a built-in sealed oil storage chamber,and made the overall structure compact.A damper model was designed and numerical simulation was carried out to study the damping characteristics and the vibration reduction performance.It shows that the damping coefficient is generally nonlinear,but the damping force has good linearity in the low speed and low frequency region.The damper significantly reduces the inertial load generated by the base swing.Compared with the control group without the damper,the radial bearing force decreases to 53.51%,the support stiffness de-creases to 0.038 times,and the radial vibration displacement and speed of the shafting increase to 14.63 times.However,the product of the two is still less than 1,indicating that the growth trend of the shafting vibration displacement caused by the decrease of the support stiffness is suppressed,and the shafting can be effectively reduced.
Author 谈建平
范进朝
张仕民
张金泽
田朕
姚本春
AuthorAffiliation 中国石油大学(北京)机械与储运工程学院,北京 102249;中国石油大学(北京)克拉玛依校区工学院,新疆克拉玛依 834000%中国石油大学(北京)机械与储运工程学院,北京 102249%中国石油大学(北京)克拉玛依校区工学院,新疆克拉玛依 834000%中国石油集团工程技术研究院有限公司,北京 102206
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ZHANG Jinze
TAN Jianping
TIAN Zhen
YAO Benchun
ZHANG Shimin
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DocumentTitle_FL Design and analysis of a damper for vibration attenuation of rotor-bearing system in downhole turbine generator
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Keywords vibration attenuation
Tesla valve
downhole turbine generator
单向导通性
damper
阻尼器
one-way conductivity
减振
井下涡轮发电机
特斯拉阀
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PublicationTitle 中国石油大学学报（自然科学版）
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Title 井下涡轮发电机轴系减振阻尼器设计与分析
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