液壓畢業(yè)設(shè)計外文翻譯-液壓系統(tǒng)-文庫吧在線文庫
【正文】 齒輪泵的概念是很簡單的，即它的最基本形式就是兩個尺寸相同的齒輪在一個緊密配合的殼體內(nèi)相互嚙合旋轉(zhuǎn)，這個殼體的內(nèi)部類似 “8” 字形，兩個齒輪裝在里面，齒輪的外徑及兩側(cè)與殼體緊密配合。 20 世紀初康斯坦丁 ?尼斯克 (G?Constantimsco)對能量波動傳遞 2 所進行的理論及實際研究 。大活塞所受到的壓強必然也等于 P。根據(jù)控制方式不同，液壓閥可分為開關(guān)式控制閥、定值控制閥和比例控制閥。 1 什么是液壓？ 一個完整的液壓系統(tǒng)由五個部分組成，即動力元件、執(zhí)行元件、控制元件、無件和液壓油。輔助元件包括油箱、濾油器、油管及管接頭、密封圈、壓力表、油位油溫計等。若大活塞的橫截面積是 S2，壓強 P在大活塞上所產(chǎn)生的向上的壓力 F2=PxS2 截面積是小活塞橫截面積的倍數(shù)。1910 年對液力傳動 (液力聯(lián)軸節(jié)、液力變矩器等 )方面的貢獻，使這兩方面領(lǐng)域得到了發(fā)展。來自于擠出機的物料在吸入口進入兩個齒輪中間，并充滿這一空間，隨著齒的旋轉(zhuǎn)沿殼體運動，最后在兩齒嚙合時排出。 對于粘度或密度在工 藝中有變化的流體，這種泵不會受到太多影響。 “D”型軸承結(jié)合了強制潤滑機理，使聚合物經(jīng)軸承表面，并返回到泵的進口側(cè)，以確保旋轉(zhuǎn)軸的有效潤滑。與泵體內(nèi)加熱方式不同，這些元件的損壞只限于一個板子上 ，與整個泵無關(guān)。s law, small piston to the pressure of the pressure through the liquid passed to the large piston, piston top will go a long way to go. Based crosssectional area of the small piston is S1, plus a small piston in the downward pressure on the F1. Thus, a small piston on the liquid pressure to P = F1/SI, Can be the same size in all directions to the transmission of liquid. By the large piston is also equivalent to the inevitable pressure P. If the large piston is the crosssectional area S2, the pressure P on the piston in the upward pressure generated F2 = PxS2 Crosssectional area is a small multiple of the piston crosssectional area. From the type known to add in a small piston of a smaller force, the piston will be in great force, for which 5 the hydraulic machine used to suppress plywood, oil, extract heavy objects, such as fing steel. History of the development of hydraulic And air pressure drive hydraulic fluid as the transmission is made according to the 17th century, Pascal39。 civil water projects with flood control the dam gates and devices, bed lifts installations, bridges and other manipulation of institutions。 ship deck crane (winch), the bow doors, bulkhead valves, such as the stern thruster 。s first hydraulic press. Media work in 1905 will be replaced by oilwater and further improved. World War I (19141918) after the extensive application of hydraulic transmission, especially after 1920, more rapid development. Hydraulic ponents in the late 19th century about the early 20th century, 20 years, only started to enter the formal phase of industrial production. 1925 Vickers (F. Vikers) the invention of the pressure balanced vane pump, hydraulic ponents for the modern industrial or hydraulic transmission of the gradual establishment of the foundation. The early 20th century Constantine (G ? Constantimsco) fluctuations of the energy carried out by passing theoretical and practical research。在齒輪泵出口處的壓力脈動可以控制在 1％以內(nèi)。精密加工的泵體可使 “D”型軸承與齒輪軸精確配合， 確保齒輪軸不偏心，以防齒輪磨損。如果這個阻尼器在工作中變化，亦即如果濾網(wǎng)變臟、堵塞了，或限制器的背壓升高了，則泵仍將 3 保持恒定的流量，直至達到裝置中最弱的部件的機械極限 (通常裝有一個扭矩限制器 )。因為液體是不可壓縮的，所以液體和齒就不能在同一時間占據(jù)同一空間 ，這樣，液體就被排除了。應(yīng)該指出 ,日本液壓傳動的發(fā)展較歐美等國家晚了近 20 多年。 液壓傳動的發(fā)展史 液壓傳動和 氣壓
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