車輛工程外文翻譯外文翻譯--一種新型液壓千斤頂?shù)难芯?其他專業(yè)-在線瀏覽
2025-03-24 01:44本頁面
【正文】 the big cylinder and small cylinder to return the original position. 11 Figure 3 Appearance of sample jack This new type of hydraulic jack have solved both the structure problem and operation problem, the innovation is embodied below :(1)Internal procedure hydraulic pressure linkage: the oilinput pipeline of big pump is linked directly with the oilreturn pipeline of both the big cylinder and the small cylinder, the sequence value is not only the oilinput valve of the big cylinder and big pump, also the returning valve of the small cylinder and the big cylinder, the oilleave pipeline is also the oilenter pipeline ,the oilleave valve of the big pump is also the oilenter valve of small pump, namely a valve has multipurpose. (2) It make the seedchange system highly integrates that the big pump and small pump plus big cylinder and small cylinder. (3) The closed cycle is highly effective and reliable: the oil enters the oil cylinder directly without any medial part, so the jack has a small friction drag and very few energy loses and a flexible movement. (4) The structure is simple: the system is concise, the pipeline is short, the kind of loses is reduced, the number of parts is small. We have pared our sample jack with a traditional jack. The new jack and the traditional jack both have the same lifting capacity of 12, the moving speed of jack’s handle is , the traditional jack has a constant speed of about 5mm/s, but this new the sample jack’s speed can automatically change between return stroke, the sample jack can return to the original position automatically at a high speed(the only thing needed is turning the handle of the sequence valve),but for the traditional jack, only pushes the piston of the oil cylinder can it return to its original position. 12 4 Concluding remarks This new type of manual multispeed hydraulic jack originally use a closedcycle system which has a internal procedure hydraulic pressure linkage and use the big pump as the oil tank, it can automatically change speed by selfreturning oil flowing direction of the sequence valve. This kind of speedchange has no hydraulic loss, mechanic loss, volumetric efficiency loss and energy loss. This new type of jack ingeniously solved the condition between speed and force, the design theory can also be used for other kind of manual instrument such as vices, etc. References [1] . Research and development new type of manual instrument based on coordination with strength and speed. Master Thesis. Central South University,Changsha,Hunan,2021. [2] AIWU HU,AILUN WANG..The innovation design for clamp according to unification of force and speed. Development amp。 參考文獻(xiàn) [1] and development new type of manual instrument based on coordination with strength and speed. Master South University， Changsha， Hunan,2021. [2] AIWU HU,AILUN WANG..The innovation design for clamp according to unification of force and amp。這種速度幾乎沒有壓力損失、機(jī)械損失、機(jī)械損失、容積效率損失和能量損失。在回程過程中，僅僅需要轉(zhuǎn)動(dòng)順序閥的手柄，該千斤頂能 以高速返回到原來的位置，但是對(duì)于傳統(tǒng)千斤頂，只有推動(dòng)油缸的活塞才能回到原來的位置。 假設(shè) 千斤頂手柄在工作行程中的移動(dòng)速度是 ，傳統(tǒng)千斤頂具有大約 5mm/s 的速度。 我們已將傳統(tǒng)千斤頂與我們的樣品千斤頂相比較。（ 3） 封閉循環(huán)是相當(dāng)?shù)母咝Ш涂煽浚河鸵哼M(jìn)入油缸沒有任何其它中間部分，所以這種千斤頂摩擦阻力小、很少的能量損失和靈活的運(yùn)動(dòng)。 圖 3 樣品千斤頂外觀 5 這種新型液壓千斤頂已經(jīng)解決了結(jié)構(gòu)和操作的問題，其創(chuàng)新如下： (1)內(nèi)部產(chǎn)生液壓聯(lián)動(dòng)：大油泵輸油管線 與大小油缸的回油管線直接連接，順序閥不僅僅是大油缸和大油泵的進(jìn)油閥，也是小油缸和大油缸的回油閥，卸油管道也是進(jìn)油管道，大油泵的排油閥也
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