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The torsional vibration of reciprocating compressor crankshaft system can cause major problems such as burnt bearings and shaft fracture. In order to understand the torsional vibration response of the compressor rotor system, a torsional vibration mechanics solution method for the flexible rotor system of the compressor considering the bushing-pin collision clearance and the oil film clearance of the crankshaft-bearing was proposed, which provided a new idea and method to avoid the natural frequency of the crankshaft system. Based on the multi-body dynamics and Hertz contact theory,the torsional dynamic response of the crankshaft system with collision clearance was solved. The results show that the torsional vibration amplitude of the 4th column crank pin is the largest, the torsional angular displacement amplitude is 0.051°, and the dynamic angular velocity peak value is 156.026 rad/s. Based on this, the crankshaft-bearing oil film clearance was considered, the oil film pressure of sliding bearings was calculated by the finite difference method and the over-relaxation iterative method, and the dynamic characteristic coefficients of bearings were solved according to pressure perturbation method. The effects of the bushing-pin collision clearance and the crankshaft-bearing oil film clearance on the dynamic response of the crankshaft system were comprehensively considered in the modal analysis of the crankshaft system under preload. The resonance of the crankshaft with and without oil film clearances was compared. The results show that the natural frequencies of the 3rd and 8th orders of the crankshaft system decreases by 44.64% and 21.23%, and when considering the reduction of the resonant speed point of the crankshaft with comprehensive clearance in the same speed range, the 2nd order critical speed is reduced by 38.55%, and the probability of resonance increases.
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往复式压缩机曲轴系扭振会引起烧瓦及轴系断裂等重大问题,为掌握压缩机转子系统扭振响应,提出了一种考虑衬套-销轴碰撞间隙、曲轴-轴承油膜间隙的压缩机柔性转子系统扭振动力学求解方法,为避开曲轴系固有频率提供了一种新的思路及方法。基于多体动力学理论以及Hertz接触理论,求解了含碰撞间隙下曲轴系扭振动力学响应,分析表明,曲轴系第4列曲柄销的扭振幅值最大,扭转角位移幅值为0.051°,动态角速度峰值为156.026 rad/s。基于此,考虑了曲轴-轴承油膜间隙,利用有限差分法及超松弛迭代法计算滑动轴承油膜压力,并通过压力扰动法求解轴承动态特性系数,综合考虑衬套-销轴碰撞间隙和曲轴-轴承油膜间隙对曲轴系动态响应的影响,开展了考虑预应力下的曲轴系模态分析,并对比分析了考虑油膜间隙和不考虑油膜间隙下曲轴系的共振情况。结果表明,考虑油膜间隙后曲轴系第3、8阶固有频率分别降低了44.64%、21.23%,且在同一转速范围带内,考虑综合间隙下曲轴系共振转速点减少,2阶临界转速降低了38.55%,共振的概率增大。
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, authorsList=黄志强, 王杰, 李涛, 李刚, 王硕, 母德全)}, authors=[Author(id=1241038871924887854, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=huangzq@swpu.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1241038872285598003, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, authorId=1241038871924887854, language=EN, stringName=Zhiqiang HUANG, firstName=Zhiqiang, middleName=null, lastName=HUANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu 610500, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241038872503701815, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, authorId=1241038871924887854, language=CN, stringName=黄志强, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=西南石油大学 机电工程学院,成都 610500, bio={"content":"
黄志强,男,1968年生,四川眉山人,博士,教授;主要研究方向为石油装备振动分析与控制研究等;E-mail:huangzq@swpu.edu.cn。
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黄志强,男,1968年生,四川眉山人,博士,教授;主要研究方向为石油装备振动分析与控制研究等;E-mail:huangzq@swpu.edu.cn。
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2019,
233(4):803-812., articleTitle=Solution for the torsional vibration of the compressor shaft system with flexible coupling based on a sensitivity study, refAbstract=null), Reference(id=1241038902186791705, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, doi=null, pmid=null, pmcid=null, year=2007, volume=null, issue=null, pageStart=13, pageEnd=14, url=null, language=null, rfNumber=[40], rfOrder=65, authorNames=American Petroleum Institute, journalName=null, refType=null, unstructuredReference=American Petroleum Institute. Reciprocating compressors for petroleum,chemical,and gas industry services:API 618-2007[S].5th ed. Washington D. C.:American Petroleum Institute,
2007:13-14., articleTitle=null, refAbstract=null)], funds=[Fund(id=1241038884696543881, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, awardId=22GJHZ0284, language=EN, fundingSource=Science and Technology Program of Sichuan Province(22GJHZ0284), fundOrder=null, country=null), Fund(id=1241038884927230605, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, awardId=22GJHZ0284, language=CN, fundingSource=四川省科技计划项目(22GJHZ0284), fundOrder=null, country=null), Fund(id=1241038885065642641, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, awardId=SXHZ048, language=EN, fundingSource=Nanchong City & Southwest Petroleum University Science and Technology Strategic Cooperation Special Fund(SXHZ048), fundOrder=null, country=null), Fund(id=1241038885141140118, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, awardId=SXHZ048, language=CN, fundingSource=南充市与西南石油大学科技战略合作专项基金项目(SXHZ048), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241038871358656804, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, xref=null, ext=[AuthorCompanyExt(id=1241038871362851109, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, companyId=1241038871358656804, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu 610500, China), AuthorCompanyExt(id=1241038871367045414, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, companyId=1241038871358656804, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=西南石油大学 机电工程学院,成都 610500)])], figs=[ArticleFig(id=1241038877511700956, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.1, caption=
Reciprocating compressor engine, figureFileSmall=beF9i50zhCjuvgDQLSIpIQ==, figureFileBig=hvkq6phnMy2/oDOT87E+RQ==, tableContent=null), ArticleFig(id=1241038877658501605, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图1, caption=
往复式压缩机, figureFileSmall=beF9i50zhCjuvgDQLSIpIQ==, figureFileBig=hvkq6phnMy2/oDOT87E+RQ==, tableContent=null), ArticleFig(id=1241038877855633904, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.2, caption=
Vector diagram of the revolute joint clearance, figureFileSmall=lg+q5azKWOuMCfBVR6D2Qg==, figureFileBig=rXHakxs8811OwuUJY7N0iA==, tableContent=null), ArticleFig(id=1241038878065349109, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图2, caption=
转动副间隙矢量图, figureFileSmall=lg+q5azKWOuMCfBVR6D2Qg==, figureFileBig=rXHakxs8811OwuUJY7N0iA==, tableContent=null), ArticleFig(id=1241038878241509882, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.3, caption=
Dynamics model of the sliding bearing, figureFileSmall=a6m1t2Z9/2MtbYVmcVGbJg==, figureFileBig=AEQGbq7pzSdespD5Gcj4bg==, tableContent=null), ArticleFig(id=1241038878463808003, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图3, caption=
滑动轴承动力学模型, figureFileSmall=a6m1t2Z9/2MtbYVmcVGbJg==, figureFileBig=AEQGbq7pzSdespD5Gcj4bg==, tableContent=null), ArticleFig(id=1241038878556082694, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.4, caption=
Model of the crankshaft system, figureFileSmall=RL2zOaTbFMbs14GjiMOcgg==, figureFileBig=Z72O5441sm0PCSpyq/8MOQ==, tableContent=null), ArticleFig(id=1241038878665134603, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图4, caption=
曲轴系模型, figureFileSmall=RL2zOaTbFMbs14GjiMOcgg==, figureFileBig=Z72O5441sm0PCSpyq/8MOQ==, tableContent=null), ArticleFig(id=1241038878845489682, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.5, caption=
Motion characteristics of the piston, figureFileSmall=9D9MMx6ZBgI2qEFIZdIjpA==, figureFileBig=aAE/sIXdIQG608JxABLLUw==, tableContent=null), ArticleFig(id=1241038879025844756, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图5, caption=
活塞运动特性, figureFileSmall=9D9MMx6ZBgI2qEFIZdIjpA==, figureFileBig=aAE/sIXdIQG608JxABLLUw==, tableContent=null), ArticleFig(id=1241038879118119449, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.6, caption=
Centroid trajectory of bushings, figureFileSmall=NsR6+Mzt6YIrwcfGtDT8MA==, figureFileBig=biR7mUvjtsX/LnDNRBHCZQ==, tableContent=null), ArticleFig(id=1241038879193616924, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图6, caption=
衬套质心轨迹, figureFileSmall=NsR6+Mzt6YIrwcfGtDT8MA==, figureFileBig=biR7mUvjtsX/LnDNRBHCZQ==, tableContent=null), ArticleFig(id=1241038879386554916, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.7, caption=
Torsional angular displacement response of the crankshaft section, figureFileSmall=n+B75Lis3SwZlzRkt6UK8Q==, figureFileBig=buoOgLXhsdoo0EPPgK02Ag==, tableContent=null), ArticleFig(id=1241038879550132776, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图7, caption=
曲轴段扭转角位移响应, figureFileSmall=n+B75Lis3SwZlzRkt6UK8Q==, figureFileBig=buoOgLXhsdoo0EPPgK02Ag==, tableContent=null), ArticleFig(id=1241038879877288494, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.8, caption=
Response of angular velocity fluctuation of crankshaft section, figureFileSmall=HzF4WmXvcZs54giZqO4Xxg==, figureFileBig=8rjor8BwxsB/bgtC4H7sGw==, tableContent=null), ArticleFig(id=1241038880586125876, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图8, caption=
曲轴段角速度波动响应, figureFileSmall=HzF4WmXvcZs54giZqO4Xxg==, figureFileBig=8rjor8BwxsB/bgtC4H7sGw==, tableContent=null), ArticleFig(id=1241038880670011960, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.9, caption=
Natural frequency and vibration mode of the crankshaft system under the prestress considering the oil film clearance, figureFileSmall=UgrV0K6PMJifIRzdBPyqFw==, figureFileBig=BnOLU5MnLnR54e2Snwt5jw==, tableContent=null), ArticleFig(id=1241038880967807549, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图9, caption=
考虑油膜间隙的预应力下曲轴系固有频率及振型, figureFileSmall=UgrV0K6PMJifIRzdBPyqFw==, figureFileBig=BnOLU5MnLnR54e2Snwt5jw==, tableContent=null), ArticleFig(id=1241038881131385409, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.10, caption=
Comparison of natural frequencies of the crankshaft system, figureFileSmall=BsL+H/k6InNXF2KtyhHBaA==, figureFileBig=G+xBIA/+dB7imrwIBOgzMg==, tableContent=null), ArticleFig(id=1241038881211077192, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图10, caption=
曲轴系固有频率对比, figureFileSmall=BsL+H/k6InNXF2KtyhHBaA==, figureFileBig=G+xBIA/+dB7imrwIBOgzMg==, tableContent=null), ArticleFig(id=1241038881311740491, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.11, caption=
Campbell diagram of the prestress crankshaft system without the oil film clearance, figureFileSmall=aBYF0vck9z+xkn1AgBg6SA==, figureFileBig=OvawTjtkcxuyQ4g6dhn9kw==, tableContent=null), ArticleFig(id=1241038881542427216, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图11, caption=
不考虑油膜间隙下有预应力的曲轴系Campbell图, figureFileSmall=aBYF0vck9z+xkn1AgBg6SA==, figureFileBig=OvawTjtkcxuyQ4g6dhn9kw==, tableContent=null), ArticleFig(id=1241038881693422164, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Fig.12, caption=
Campbell diagram of the prestress crankshaft system with the oil film clearance, figureFileSmall=ev5EUrvOnLwCAeHjJ1EU2Q==, figureFileBig=GBCyjLKi3dRC7kTeBE5o5w==, tableContent=null), ArticleFig(id=1241038881802474071, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=图12, caption=
考虑油膜间隙下有预应力的曲轴系Campbell图, figureFileSmall=ev5EUrvOnLwCAeHjJ1EU2Q==, figureFileBig=GBCyjLKi3dRC7kTeBE5o5w==, tableContent=null), ArticleFig(id=1241038881857000027, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Tab.1, caption=
Technical parameters of the compressor
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 角速度 Angular velocity ω/(r/min) | 1 486 |
| 活塞行程 Piston stroke x0/mm | 88.9 |
| 进-排气压力 Intake-exhaust pressure p/MPa | 4.0~7.5 |
| 轴功率 Shaft power P/kW | 485 |
| 碰撞间隙 Collision clearance c1/mm | 0.04 |
), ArticleFig(id=1241038882070909537, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=表1, caption=
压缩机技术参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 角速度 Angular velocity ω/(r/min) | 1 486 |
| 活塞行程 Piston stroke x0/mm | 88.9 |
| 进-排气压力 Intake-exhaust pressure p/MPa | 4.0~7.5 |
| 轴功率 Shaft power P/kW | 485 |
| 碰撞间隙 Collision clearance c1/mm | 0.04 |
), ArticleFig(id=1241038882330956392, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Tab.2, caption=
Material properties of crankshaft components
, figureFileSmall=null, figureFileBig=null, tableContent=
| 零部件 Parts | 密度 Density ρ/(kg/m3) | 泊松比 Poisson’s ratio ν | 弹性模量 Elastic modulus E/GPa |
|---|
| 轴承 Bearing | 8 700 | 0.37 | 110 |
| 曲轴 Crankshaft、连杆 Connecting rod | 7 850 | 0.28 | 212 |
| 衬套 Bushing | 8 760 | 0.32 | 95 |
| 十字头销 Crosshead pin | 7 870 | 0.254 | 207 |
| 电动机轴 Motor shaft | 7 890 | 0.269 | 209 |
| 联轴器 Coupler | 7 860 | 0.28 | 211 |
| 其余 Others | 7 850 | 0.3 | 200 |
), ArticleFig(id=1241038882494534252, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=表2, caption=
曲轴系关键零部件材料属性
, figureFileSmall=null, figureFileBig=null, tableContent=
| 零部件 Parts | 密度 Density ρ/(kg/m3) | 泊松比 Poisson’s ratio ν | 弹性模量 Elastic modulus E/GPa |
|---|
| 轴承 Bearing | 8 700 | 0.37 | 110 |
| 曲轴 Crankshaft、连杆 Connecting rod | 7 850 | 0.28 | 212 |
| 衬套 Bushing | 8 760 | 0.32 | 95 |
| 十字头销 Crosshead pin | 7 870 | 0.254 | 207 |
| 电动机轴 Motor shaft | 7 890 | 0.269 | 209 |
| 联轴器 Coupler | 7 860 | 0.28 | 211 |
| 其余 Others | 7 850 | 0.3 | 200 |
), ArticleFig(id=1241038882641334898, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Tab.3, caption=
Parameters of sliding bearings
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 轴承宽度 Bearing width L/mm | 48.2 |
| 轴承内径Bearing inner diameter D/mm | 89 |
| 偏心率Eccentricity εe | 0.6 |
| 间隙Clearance c'/mm | 0.05 |
| 轴颈转速Neck speed n/(r/min) | 1 486 |
| 润滑油黏度Lubricating oil viscosity η/(Pa·s) | 0.018 |
| 轴承载荷 Bearing load W/kN | 280 |
), ArticleFig(id=1241038882754581108, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=表3, caption=
滑动轴承参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 轴承宽度 Bearing width L/mm | 48.2 |
| 轴承内径Bearing inner diameter D/mm | 89 |
| 偏心率Eccentricity εe | 0.6 |
| 间隙Clearance c'/mm | 0.05 |
| 轴颈转速Neck speed n/(r/min) | 1 486 |
| 润滑油黏度Lubricating oil viscosity η/(Pa·s) | 0.018 |
| 轴承载荷 Bearing load W/kN | 280 |
), ArticleFig(id=1241038882892993142, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Tab.4, caption=
Dynamic characteristic coefficient of sliding bearing
, figureFileSmall=null, figureFileBig=null, tableContent=
无量纲油膜刚度 Dimensionaless oil film stiffness Kij | 值 Value | 无量纲油膜阻尼 Dimensionaless oil film damping Cij | 值 Value |
|---|
| Kxx | 1.213 | Cxx | 2.469 |
| Kxy | -2.700 | Cxy | 2.138 |
| Kyx | 1.090 | Cyx | 2.257 |
| Kyy | 3.556 | Cyy | 6.297 |
), ArticleFig(id=1241038883194983033, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=表4, caption=
滑动轴承动态特性系数
, figureFileSmall=null, figureFileBig=null, tableContent=
无量纲油膜刚度 Dimensionaless oil film stiffness Kij | 值 Value | 无量纲油膜阻尼 Dimensionaless oil film damping Cij | 值 Value |
|---|
| Kxx | 1.213 | Cxx | 2.469 |
| Kxy | -2.700 | Cxy | 2.138 |
| Kyx | 1.090 | Cyx | 2.257 |
| Kyy | 3.556 | Cyy | 6.297 |
), ArticleFig(id=1241038883308229245, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Tab.5, caption=
Equivalent parameters of components
, figureFileSmall=null, figureFileBig=null, tableContent=
等效部件 Equivalent part | 等效质量 Equivalent mass/kg | 等效转动惯量 Equivalent moment of inertia/(kg·m2) |
|---|
| 平衡环 Balance ring | 9 | 0.24 |
旋转部件 Rotating parts | 挡风圈 Windshield ring | 14.9 | 0.4 |
外风扇 External fan | 23 | 0.7 |
| 内风扇 Inner fan | 28.2 | 1.1 |
连杆大头 Rod big-end | 5.77 | 0.011 4 |
| 连杆小头 Rod small-end | 2.89 | |
往复部件 Reciprocation parts | 活塞组件 Piston assembly | 15.92 | 0.028 3 |
十字头 Crosshead | 7.33 |
十字头销 Crosshead pin | 2.45 | |
), ArticleFig(id=1241038883442446978, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=表5, caption=
部件等效参数
, figureFileSmall=null, figureFileBig=null, tableContent=
等效部件 Equivalent part | 等效质量 Equivalent mass/kg | 等效转动惯量 Equivalent moment of inertia/(kg·m2) |
|---|
| 平衡环 Balance ring | 9 | 0.24 |
旋转部件 Rotating parts | 挡风圈 Windshield ring | 14.9 | 0.4 |
外风扇 External fan | 23 | 0.7 |
| 内风扇 Inner fan | 28.2 | 1.1 |
连杆大头 Rod big-end | 5.77 | 0.011 4 |
| 连杆小头 Rod small-end | 2.89 | |
往复部件 Reciprocation parts | 活塞组件 Piston assembly | 15.92 | 0.028 3 |
十字头 Crosshead | 7.33 |
十字头销 Crosshead pin | 2.45 | |
), ArticleFig(id=1241038883769602692, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=EN, label=Tab.6, caption=
Resonance frequency range
, figureFileSmall=null, figureFileBig=null, tableContent=
阶次 Order | 固有频率 Natural frequency f0/Hz | 驱动频率 Driving frequency f1/Hz | ±5%范围 ±5% range/Hz |
|---|
| 1 | 63.57 | 24.77 | 23.53~26.01 |
| 2 | 90.20 | 49.53 | 47.06~52.02 |
| 3 | 90.20 | 74.3 | 70.59~78.26 |
| 4 | 148.92 | 99.07 | 94.13~104.03 |
| 5 | 148.93 | 123.83 | 117.66~130.04 |
| 6 | 183.5 | 148.6 | 141.17~156.03 |
| 7 | 183.5 | 173.37 | 164.72~182.06 |
| 8 | 264.18 | 198.13 | 188.25~208.07 |
| 9 | — | 222.9 | 211.78~234.08 |
| 10 | — | 247.77 | 235.32~260.09 |
), ArticleFig(id=1241038884461662855, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241038857601339393, language=CN, label=表6, caption=
共振频率范围
, figureFileSmall=null, figureFileBig=null, tableContent=
阶次 Order | 固有频率 Natural frequency f0/Hz | 驱动频率 Driving frequency f1/Hz | ±5%范围 ±5% range/Hz |
|---|
| 1 | 63.57 | 24.77 | 23.53~26.01 |
| 2 | 90.20 | 49.53 | 47.06~52.02 |
| 3 | 90.20 | 74.3 | 70.59~78.26 |
| 4 | 148.92 | 99.07 | 94.13~104.03 |
| 5 | 148.93 | 123.83 | 117.66~130.04 |
| 6 | 183.5 | 148.6 | 141.17~156.03 |
| 7 | 183.5 | 173.37 | 164.72~182.06 |
| 8 | 264.18 | 198.13 | 188.25~208.07 |
| 9 | — | 222.9 | 211.78~234.08 |
| 10 | — | 247.77 | 235.32~260.09 |
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