eccentric angle 中文意思是什麼
eccentric angle
解釋
【數學】離心角，偏心角。-
We have been closely cooperated with beijing institute of technology, one of the most prestigious university in china, and co - developed ion vacuum plating technique, multi - arc tin coating technique and twin - eccentric automatic fuel supply advancer in the recent years successively, and acquired many patents. the sag and scda series fuel supply advancer manufactured in one of our branch company : has adopted the advanced twin - eccentric blocks structure, thoroughly changed the traditional structurearc block, sliding block. the angle of advance is very accurate and precise, also perfect at position resume
由本總公司提前器廠生產的sag scdm兩大系列供油角度自動提前器，改變了目前提前器市場上的傳統結構，用先進的雙偏心式結構，代替了二十年一貫制的弧形塊滑塊式結構，具有提前角特別靈敏，恢復性好，怠速運轉無噪音等優點，克服了提前器擺動大漏油等常見缺陷。 -
Along with the progress of drilling technology, many new types of bha such as steering motor assembly, dropping assembly with eccentric bend sub, dropping assembly with flexible connection are developed based on common building, dropping and holding assemblies. for using these bha, a new mathematical model is put forward for 3d static analysis of these types of bha under small deflection. and its weighted residual solution is given. the mathematical model includes ( 1 ) differential equations ; ( 2 ) boundary conditions at drill bit, stabilizer, bend angle, diameter change, tangential point and borehole wall ; ( 3 ) lateral forces and deflection angles of bit. the software based upon this method runs well
為了更好地應用各種新鉆具，建立了適用於對普通下部鉆具、導向鉆具、帶偏心彎接頭和柔性接頭的下部鉆具進行三維小撓度靜力學分析的數學模型，包括（ 1 ）微分方程； （ 2 ）鉆頭、穩定器、彎角、變截面、切點和井壁的邊界條件； （ 3 ）鉆頭的側向力和鉆頭轉角.給出了該模型的加權余量解.用該方法編寫的軟體應用效果良好 -
Field application result shows that for eccentric screw stabilizer, there exist errors of calculated outside diameters and measured diameters, the upper stabilizer has severe influence on side force of drilling bits, and it can be optimally designed, while the bending angle of screw also has severe influence on bit side force, and it should be rationally used
現場使用結果表明，螺桿本體穩定器採用偏心式時計算外徑與丈量直徑存在偏差；上穩定器對鉆頭側向力具有較大的影響，可以優化設計；螺桿彎角對鉆頭側向力影響較大，需合理使用。 -
The paper deduced the seal torque of the tri - eccentric butterfly valve and gave it a qualitative analysis. the results indicated : for the tri - eccentric butterfly valve with the same caliber, theseal torque would decrease with the butterfly disc thickness increasing ; the seal torque would increase with the radial eccentricity increasing ; however, the axis eccentricity effected on the seal torque minutely ; the seal torque would increase with the half cone angle increasing appreciably of the cone which the butterfly disc belonged to
本文還對三偏心蝶閥的密封力矩作了推導並進行了定性的分析，結果表明，對于同一口徑的三偏心蝶閥，密封力矩與蝶板的厚度近似成反比；與徑向偏心距近似成正比，變化也很明顯；而軸向偏心距對密封力矩的影響不是很大；密封力矩隨著蝶板所在的圓錐半錐角的增大而有所增加。 -
If applied experiential formula mechanically to calculate the dynamic moment of the tri - eccentric butterfly vavle, its errors for the results would be larger. the paper, by virtue of the postulate of flow with fixed constant, eddiless of ideal liquid, calculated laplace equation by finite difference method in rectangular coordinates, gained pressure distribution on the butterfly disc section, thereby figured out its dynamic moment under each opening angle and the method was feasible for calculating dynamic moment of symmetry or not, designed the program and described the curve of dynamic moment. finally, the paper infered their laws
採用經驗公式來計算三偏心蝶閥的動水力矩，誤差比較大，本文根據三偏心蝶閥的結構特點，利用理想流體的定常、無旋流動的假定，用有限差分法在直角坐標系中求解拉普拉斯方程，得到蝶板截面上的壓力分佈，從而計算出蝶板在各個開度下的動水力矩，設計出了求解的程序，給出了程序運行的結果並進行了數據處理從而得到了動水力矩曲線，總結了它的變化規律。
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