Systematic Design of Cylinder Heads for Reciprocating Compressors

The dC$ign of reciprocating compressor cylinder heads consi.Us of thr= main tasks: 1) calculation methods to determine !he aclual SUCS$C$, 2) dctctmination of the factors of safety given thC$C stresscs, 3) validation of these SlrCSSC$ with strain gage dala. This paper will address the first of thC$C tasks, namely, the calculalion of cylinder head Stn=ssCS. A gcncnlized procedure calculating stresses in rccipnx:aling compressor cylinder heads, indcpcndcnt of PEA, is dcscr:ibcd. This method can be used for the prclilllinary design method prior to a costly FEA. It can also be used as a design tool for designers that may not have ac;:ess to FEA software. M,,. ........... .. Q,.. .. ......... .. M~a ............ . Q,. ........... .. RIIOLT ............ . p<IASKI!I'""'""""''" Mu ............ . Qu ........... .. Mlc Q,., Pa.u F.,,. F ... FSlll F.,., eMIA Wp,uA eQIA WQIA ........ .,,,. e-SICI!I"--........ .. wrGASa!f .......... .. e .. , .............. . WniA eM,. WMIB eQIB WQII e .... WFStD ·····•······· eP<'lASIB•-......... . NOMENCLATURE Intmlal moment on clement • A· at juncture 1, figure 2. Intema.l shear force on clement ·A· at juncture 1, figure 2. Internal moment on element "B" at junctum 1, figure 2. Internal shear force on clement "B • at juncture 1, figure 2. &tmlal bolt force. Extmnal gaskl:t pressure. Internal moment on clement "B" at juncture 2, figure 2. Internal shear forte on clement "B" at junctutc 2, figure 2. Internal moment on element ·c• at juncture 2, figure 2. Intemal sl:car force on element •c• at juncture 2, figure 2. Extemal gas pressure. Intcmal axial load on element • A • at juncture I, figure 2. Intemal axial1oad on element "B" at juncture I, figure 2. Internal axial load on clement "B" at juncture 2, figure 2. Intcmai axial load on element ·c· at juncture 2, figure 2. Rotation of =!ement • A • at juncture I, due to M,,.. Radial displacement of element ·A· at juncture 1, due to M, ... Rotation of =lemcnt • A • at juncture 1, due to Q, ... Radial displacement of =lcment • A" at juncture 1, due to Q, ... Rotation of element • A" at juncture I, due to P<IASlCl!T· Radial displal:ement of clement • A • at juncture 1, due to P <IASKI!I"· Rotation of element • A" at juncture 1, due to F51A. Radial displacement of element • A • at juncture I, due to F.,,.. Rotation of element "B" at juncture 1, due to M18• Radial displa.:cment of element "B" at junerure 1, due to M, •. Rotation of element "B" at juncture I, due to Q, •. Radial displacement of element "B" at juncture I, due to Q18• Rotation of dement "B" at juncture I, due to F.,8• Radial displacement of element "B" at juncture I, due to F., 8 • Rotation of element "B" at juncture I, due to PGAS•