中英文文獻(xiàn)翻譯

1、The working principle of gear pumpBy into the internal gear pump a pair of gear, gear of two side have cover, shell, cover and gear of each tooth formed many seal groove between work cavity. When gear as shown on the right direction rotates, oil absorption cavity due to mesh with each other in engag

2、ement gradually withdraw, seal volume increase gradually, vacuum forming part of the oil in the tank, so outside the atmospheric pressure, the function of the oil absorption, oil absorption into the cavity, the gear, and as full of slot between gear rotating, put the oil to the left pressure oil lum

3、en. In one side, because gear oil pressure here into meshing, seal gradually working chamber volume will decrease, the oil will be out, from pressure oil chamber pressure is sent to the in pipeline. In the working process of the gear pump, as long as two gear direction of rotation unchanged, its to

4、absorb the soot, the position of the cavity is sure the same. Here the meshing point tooth contact line has been space high and low voltage cavity with two plays a role in the gear pump oil, so do not need set up special assignment institutions, this is it and other types of volumetric hydraulic pum

5、p differences. The concept of the gear pump is very simple, that is, it is the most basic form of two dimensions of the same gear in a closely in the shell, the shell rotating mesh with each other the internal similar 8 glyph, two gear, gear inside the outer diameter and shell on both sides and clos

6、ely. From the extruder materials in the suction into two gear, and full of the middle space, with the rotation of the teeth, and the last in the shell movement along the two teeth mesh eduction.I n terms of speaking, the gear pump also called positive displacement device, that is like a cylinder pis

7、ton, when in a tooth into another tooth fluid, liquid space by mechanical discharged. To squeeze Because liquids as incompressible, so the liquid and tooth can occupy the same space at the same time, such, liquid was ruled out. Because of the constant mesh, this phenomenon is in continuous occur, th

8、us also in the pump export provides a continuous removal amount, pump every around, the amount of discharge are the same. Along with the drive shaft rotation incessantly, the pump is also not a break from fluid. The flow rate of the pump and the speed of the pump directly about.In fact, there were a

9、 small amount of the pump fluid loss, which make the pump efficiency cant reach 100%, because these fluid is used to lubricating bearings and gear, and on both sides of the pump body cant without clearance fit, so cant make fluid from export 100% from a small amount of fluid loss, so is inevitable.

10、However pump can still operating well, for most extrusion material, it can still reach 93% 98% of efficiency. For viscosity or density in the process of change, this pump is not fluid too much influence. If there is a damper, such as in the row export side put a screen or a limitation for the device

11、, the pump will promote the fluid through them. If the damper in work, that is, if the mesh changes become dirty, blocked, or the limit of back pressure increased, the pump will remain constant flow, until it reaches the weakest part of the device of mechanical limit (usually equipped with a torque

12、limit device).For a pump rotation speed, in fact, there is a limit, it mainly depends on process flow, if the transfer of oil, it can pump is at high speed rotating, but when the fluid is a kind of high viscosity polymer melt, the restrictions will be significantly reduced. Promote high sticky fluid

13、 into the suction side of the two tooth space is very important, if the space did not fill, it cant pump discharge accurate flow, so the PV value (pressure x velocity is also a) a limiting factor, and its a process variables. Because these restrictions, the gear pump manufacturers will provide a ser

14、ies of products, i.e., different specifications and displacement (every turn a week does quantity). The pump will and the concrete application process, in order to make the system combined capacity and price to achieve optimal.齒輪泵的工作原理輪泵由裝在殼體內(nèi)的一對齒輪所組成，齒輪兩側(cè)有端蓋，殼體、端蓋和齒輪的各 個齒間槽組成了許多密封工作腔。當(dāng)齒輪按圖示方向旋轉(zhuǎn)時，右側(cè)

15、吸油腔由于相互嚙 合的輪齒逐漸脫開，密封工作容積逐漸增大，形成部分真空，因此油箱中的油液在外 界大氣壓力的作用下，經(jīng)吸油管進(jìn)入吸油腔，將齒間槽充滿，并隨著齒輪旋轉(zhuǎn)，把油 液帶到左側(cè)壓油腔內(nèi)。在壓油區(qū)一側(cè)，由于輪齒在這里逐漸進(jìn)入嚙合，密封工作腔容 積不斷減小，油液便被擠出去，從壓油腔輸送到壓力管路中去。在齒輪泵的工作過程 中，只要兩齒輪的旋轉(zhuǎn)方向不變，其吸、排油腔的位置也就確定不變。這里嚙合點(diǎn)處 的齒面接觸線一直分隔高、低壓兩腔起著配油作用，因此在齒輪泵中不需要設(shè)置專門 的配流機(jī)構(gòu)，這是它和其它類型容積式液壓泵的不同之處。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

16、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。來自于擠出機(jī)的物料在吸入口進(jìn)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(yùn)動，最后在兩齒嚙合時排出。在術(shù)語上講，齒輪泵也叫正排量裝置，即像一個缸筒內(nèi)的活塞，當(dāng)一個齒進(jìn)入另 一個齒的流體空間時，液體就被機(jī)械性地擠排出來。因?yàn)橐后w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。由于齒的不斷嚙合， 這一現(xiàn)象就連續(xù)在發(fā)生，因而也就在泵的出口提供了一個連續(xù)排除量，泵每轉(zhuǎn)一轉(zhuǎn)， 排出的量是一樣的。隨著驅(qū)動軸的不間斷地旋轉(zhuǎn)，泵也就不間斷地排出流體。泵的流 量直接與泵的轉(zhuǎn)速有關(guān)。實(shí)際上，在泵內(nèi)有很少量的流體損失，這使泵的運(yùn)行效率不能達(dá)到100%，因?yàn)?這些流體被用來潤滑軸承及齒輪兩側(cè)，而泵體也絕不可能無間隙配合，故不能使流體 100%地從出口排出，所以少量的流體損失是必然的。然而泵還是可以良好地運(yùn)行， 對大多數(shù)擠出物料來說，仍可以達(dá)到93%98%的效率。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。如果有一個阻尼器，比如在排出口側(cè)放一個 濾網(wǎng)或一個限制器，泵則會推動流體通過它們。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，則泵仍將保持恒定的流量，直至達(dá) 到裝置