ࡱ> Y` R`bjbj!    888(D90: ^k;T>:>>>}B=E Fhjjjjjjj$Dmho\ji IB|}BIIj  >>k^^^I  >^ >j^Ij^^:mc, @ c>; 0Ji18Uc d.k0^kc.pS\Hpcp$p$ cFL7G6^mG,G(qFBF$Fjj=^FFF^kIIII *8 8         -NVwl'Yf[NSN kNe bl:g0WbRg f[uY TsIQ f[ S02021736 NNs~wl] z2002-7s c[Ye^ _SfQ 2006t^6g22e Xd 9hnc8nh_bl:gVޏFg:ggvQUOsQ|TЏRyrp ^zN8nhvFdRe zv^|nx{Q8nh_bl:g`pЏRSpeQbl:gIQFgY}wT`'`}wSЏR:ggv͑RT`'``Q ^zNbl:g|~v[fgvI{HeRRf[!jWv^BlQwQ gRs^ayr_vfgtQmbw9hncbl:gv&^ ORyrpTRf[Rg ^zNNy{Ovv&^ ORHes{!jW :NRgbl:gwe]\OSpecONt/ec͑e[INNhTg}w|pe{P5uR:g[Rsv^N8^ĉ8nh_bl:g0_Sw_bl:g:NO QN{:g z^ [sN͑Spev{ ~6RNsQ.f~ 1udkk_QNbl:gvOp0e-N؏[vQNbl:gۏLN{N~0 sQ.͋^R^mbwhTg}w|pe_Sw_ ABSTRACT Based on the unique geometry and mechanical movement of beam pumping unit, we have presented a simple swing equation and computed motorial parameter; meanwhile under the conditions of the static load and inertial load of the polished-rod of a conventional pumping unit, we have also presented on equivalent dynamic model of the pumping unit system and the type-curves of net torque of the crankshaft with the characteristic of inertial counterbalance have been computed; Based on features and mechanical analysis of belt a simple model for calculating belt transmission efficiency is developed the model can provide a theoretical base for study on the other transient variable of beam pumping unit; The cyclic loading coefficients is defined once and compute the nominal Power of the motor; at last we compare the beam pumping unit and the adjustable diameter and changeable toque pumping unit, based on this a program have been finished and we also introduce other power saving pumping units. Keywords: velocity; acceleration; toque; the cyclic loading coefficients; adjustable diameter and changeable toque pumping unit v U_ ,{1z MR& & & & & & & & & & & & & & & & & & & & & & & & & & 1 11 VQYl0ubl:gvsr& & & & & & & & & & & & & & & & & & 1 12 8nh_bl:gvel& & & & & & & & & & & & & & & & & & 1 ,{2z 8nh_bl:g0WbRg& & & & & & & & & & & & & & & & 2 21 8nh_bl:g& & & & & & & & & & & & & & & & & & & & & & & 2 22 bl:g`pЏRĉ_& & & & & & & & & & & & & & & & & & & & 3 221 8nhFdRe zv^z & & & & & & & & & & & & & & & & & 3 ,{3z 0WbRgoNv6RN^(u& & & & & & & & & & & & & & 5 31 lNpenc& & & & & & & & & & & & & & & & & & & & & & & & & 5 32 0WbYpenc& & & & & & & & & & & & & & & & & & & & & & & 5 ,{4z ~& & & & & & & & & & & & & & & & & & & & & & & & & & 7 "& & & & & & & & & & & & & & & & & & & & & & & & & & & & & & 8 Se.s& & & & & & & & & & & & & & & & & & & & & & & & & & & & 9 DU_& & & & & & & & & & & & & & & & & & & & & & & & & & & & & 10 ,{1z MR 1.1 VQYl0ubl:gvsr bl:gR:N8nh_bl:gTe8nh_bl:g$Ny08nh_bl:gwQ g~g{US06R [f0S`'`ؚ0]\OcEN0^]QagN}YI{Op (WǑl]NSU\vRg'Yϑv^(u;FO8nh_bl:g_NX[(W NKNY YHesNO N0(u5ub,gؚI{:p0e8nh_bl:g gQ ze8nhbl:gI{ [wQ gRsVpeؚ0HesؚI{Op @bNbl:gvSU\eT/fe8nh_bl:g[1]0 1.2 8nh_bl:gvel _w8nh_bl:g5u:g}HesNOvSV;N gN NQ*Neb: (1)8nh_bl:gv5u:g/f&^}wR VdkwRe@bvwR5uAm_'Y RsVpe_NO [5uR:gvRsBlk'Y0 (2)8nh_bl:gvQRs/fhTg'`SSv V vQqR5u:gv5uAm_N/fhTg'`SSv0(W b5uR:ge :NNO NǏAQv)n^ 5u:gv[5uAmS5u:gЏLǏ z-Nvg'Y

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