Pneumatic stability analysis of single-pad aerostatic thrust bearing with pocketed orifice
The pneumatic hammer phenomenon and pneumatic stability of a single-pad aerostatic thrust bearing with pocked orifice were investigated numerically. A time-dependent dynamic model for pneumatic stability analysis of the bearing was established with taking the pocket volume and the mass flow differen...
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| Veröffentlicht in: | Proceedings of the Institution of Mechanical Engineers. Part J, Journal of engineering tribology Journal of engineering tribology, 2020-12, Vol.234 (12), p.1857-1866 |
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| container_title | Proceedings of the Institution of Mechanical Engineers. Part J, Journal of engineering tribology |
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| creator | Zheng, Yueqing Yang, Guangwei Cui, Hailong Hou, Yu |
| description | The pneumatic hammer phenomenon and pneumatic stability of a single-pad aerostatic thrust bearing with pocked orifice were investigated numerically. A time-dependent dynamic model for pneumatic stability analysis of the bearing was established with taking the pocket volume and the mass flow difference between the pocket inlet and outlet into account. The numerical prediction indicates that the delay effect is an important reason for the pneumatic hammer phenomenon. With considering the delay effect, an in-depth explanation for the pneumatic hammer phenomenon is proposed in this paper. The air compressibility combined with the volume effect in the aerostatic bearing could lead to the delay of pocket pressure change, then resulting in the delay of bearing force change at larger film thickness region. The delay of the bearing force change at larger film thickness region causes the bearing damping to become negative at larger film thickness. The negative damping provides some energy into the aerostatic bearing system at larger film thickness and maintains vibration, which leads to the pneumatic hammer phenomenon. |
| doi_str_mv | 10.1177/1350650119894168 |
| format | Article |
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A time-dependent dynamic model for pneumatic stability analysis of the bearing was established with taking the pocket volume and the mass flow difference between the pocket inlet and outlet into account. The numerical prediction indicates that the delay effect is an important reason for the pneumatic hammer phenomenon. With considering the delay effect, an in-depth explanation for the pneumatic hammer phenomenon is proposed in this paper. The air compressibility combined with the volume effect in the aerostatic bearing could lead to the delay of pocket pressure change, then resulting in the delay of bearing force change at larger film thickness region. The delay of the bearing force change at larger film thickness region causes the bearing damping to become negative at larger film thickness. The negative damping provides some energy into the aerostatic bearing system at larger film thickness and maintains vibration, which leads to the pneumatic hammer phenomenon.</description><identifier>ISSN: 1350-6501</identifier><identifier>EISSN: 2041-305X</identifier><identifier>DOI: 10.1177/1350650119894168</identifier><language>eng</language><publisher>London, England: SAGE Publications</publisher><subject>Aerostatic bearings ; Aerostatics ; Compressibility ; Damping ; Delay ; Dynamic models ; Dynamic stability ; Film thickness ; Mass flow ; Mechanical engineering ; Numerical prediction ; Orifices ; Stability analysis ; Thrust bearings ; Time dependence</subject><ispartof>Proceedings of the Institution of Mechanical Engineers. 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Part J, Journal of engineering tribology</title><description>The pneumatic hammer phenomenon and pneumatic stability of a single-pad aerostatic thrust bearing with pocked orifice were investigated numerically. A time-dependent dynamic model for pneumatic stability analysis of the bearing was established with taking the pocket volume and the mass flow difference between the pocket inlet and outlet into account. The numerical prediction indicates that the delay effect is an important reason for the pneumatic hammer phenomenon. With considering the delay effect, an in-depth explanation for the pneumatic hammer phenomenon is proposed in this paper. The air compressibility combined with the volume effect in the aerostatic bearing could lead to the delay of pocket pressure change, then resulting in the delay of bearing force change at larger film thickness region. The delay of the bearing force change at larger film thickness region causes the bearing damping to become negative at larger film thickness. The negative damping provides some energy into the aerostatic bearing system at larger film thickness and maintains vibration, which leads to the pneumatic hammer phenomenon.</description><subject>Aerostatic bearings</subject><subject>Aerostatics</subject><subject>Compressibility</subject><subject>Damping</subject><subject>Delay</subject><subject>Dynamic models</subject><subject>Dynamic stability</subject><subject>Film thickness</subject><subject>Mass flow</subject><subject>Mechanical engineering</subject><subject>Numerical prediction</subject><subject>Orifices</subject><subject>Stability analysis</subject><subject>Thrust bearings</subject><subject>Time dependence</subject><issn>1350-6501</issn><issn>2041-305X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kM1LxDAQxYMouK7ePQY8V2eaTdIeZfELBD0oiJeSppPdrN3tmqTI_ve2rCAIwsAc3u89eI-xc4RLRK2vUEhQEhDLopyhKg7YJIcZZgLk2yGbjHI26sfsJMYVAKAWxYS9P2-oX5vkLY_J1L71acfNxrS76CPvHI9-s2gp25qGGwrdAI1sWoY-Jl6TCYPOv3xa8m1nPyhRw7vgnbd0yo6caSOd_fwpe729eZnfZ49Pdw_z68fMCihTphopZT0c5FSjNpIaa0Bj7pxFgQgGcp3XjTKNIFW4vNRIljQI5QqhCjFlF_vcbeg-e4qpWnV9GCrEKp8JJaQutRgo2FN2KBEDuWob_NqEXYVQjQtWfxccLNneEs2CfkP_5b8Bwdpw-g</recordid><startdate>202012</startdate><enddate>202012</enddate><creator>Zheng, Yueqing</creator><creator>Yang, Guangwei</creator><creator>Cui, Hailong</creator><creator>Hou, Yu</creator><general>SAGE Publications</general><general>SAGE PUBLICATIONS, INC</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-2114-0155</orcidid><orcidid>https://orcid.org/0000-0002-9069-9753</orcidid></search><sort><creationdate>202012</creationdate><title>Pneumatic stability analysis of single-pad aerostatic thrust bearing with pocketed orifice</title><author>Zheng, Yueqing ; Yang, Guangwei ; Cui, Hailong ; Hou, Yu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c309t-6d555b55b02eb17a5edca0712ffc13110a0272bd6ad3e68f2971ece7036f83683</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aerostatic bearings</topic><topic>Aerostatics</topic><topic>Compressibility</topic><topic>Damping</topic><topic>Delay</topic><topic>Dynamic models</topic><topic>Dynamic stability</topic><topic>Film thickness</topic><topic>Mass flow</topic><topic>Mechanical engineering</topic><topic>Numerical prediction</topic><topic>Orifices</topic><topic>Stability analysis</topic><topic>Thrust bearings</topic><topic>Time dependence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zheng, Yueqing</creatorcontrib><creatorcontrib>Yang, Guangwei</creatorcontrib><creatorcontrib>Cui, Hailong</creatorcontrib><creatorcontrib>Hou, Yu</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Proceedings of the Institution of Mechanical Engineers. Part J, Journal of engineering tribology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zheng, Yueqing</au><au>Yang, Guangwei</au><au>Cui, Hailong</au><au>Hou, Yu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pneumatic stability analysis of single-pad aerostatic thrust bearing with pocketed orifice</atitle><jtitle>Proceedings of the Institution of Mechanical Engineers. Part J, Journal of engineering tribology</jtitle><date>2020-12</date><risdate>2020</risdate><volume>234</volume><issue>12</issue><spage>1857</spage><epage>1866</epage><pages>1857-1866</pages><issn>1350-6501</issn><eissn>2041-305X</eissn><abstract>The pneumatic hammer phenomenon and pneumatic stability of a single-pad aerostatic thrust bearing with pocked orifice were investigated numerically. A time-dependent dynamic model for pneumatic stability analysis of the bearing was established with taking the pocket volume and the mass flow difference between the pocket inlet and outlet into account. The numerical prediction indicates that the delay effect is an important reason for the pneumatic hammer phenomenon. With considering the delay effect, an in-depth explanation for the pneumatic hammer phenomenon is proposed in this paper. The air compressibility combined with the volume effect in the aerostatic bearing could lead to the delay of pocket pressure change, then resulting in the delay of bearing force change at larger film thickness region. The delay of the bearing force change at larger film thickness region causes the bearing damping to become negative at larger film thickness. The negative damping provides some energy into the aerostatic bearing system at larger film thickness and maintains vibration, which leads to the pneumatic hammer phenomenon.</abstract><cop>London, England</cop><pub>SAGE Publications</pub><doi>10.1177/1350650119894168</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0002-2114-0155</orcidid><orcidid>https://orcid.org/0000-0002-9069-9753</orcidid></addata></record> |
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| ispartof | Proceedings of the Institution of Mechanical Engineers. Part J, Journal of engineering tribology, 2020-12, Vol.234 (12), p.1857-1866 |
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| source | SAGE Complete A-Z List |
| subjects | Aerostatic bearings Aerostatics Compressibility Damping Delay Dynamic models Dynamic stability Film thickness Mass flow Mechanical engineering Numerical prediction Orifices Stability analysis Thrust bearings Time dependence |
| title | Pneumatic stability analysis of single-pad aerostatic thrust bearing with pocketed orifice |
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