【正文】 refers to the process with the leak occurred in the system, such as hydraulic pistoncylinder on both sides of the leakage, the control valve spool and valve body, such as between the leakage. Although no internal leakage of hydra ulic fluid loss, but due to leakage, the control of the established movements may be affected until the cause system failures. Outside means the occurrence of leakage in the system and the leakage between the external environment. Direct leakage of hydraulic oil into the environment, in addition to the system will affect the working environment, not enough pressure will cause the system to trigger a fault. 7 Leakage into the enviro nment of the hydraulic oil was also the danger of fire. Solution: the use of better quality seals to improve the machining accuracy of equipment. 泄漏 液壓系統(tǒng)的泄漏分為內(nèi)泄漏和外泄漏。液壓系統(tǒng)用于升降機(jī)，挖掘機(jī)，泵站，強(qiáng)夯機(jī)，起重機(jī)，等等大型工業(yè)，建筑，工廠，企業(yè)，還有升降機(jī)，升降平臺(tái)，登車橋等等行業(yè)。 Pneumatic Industry: 氣動(dòng)行業(yè)： 8 Products to small size, light weight, low power consumption, integrated portfolio of development, the implementation of the various types of ponents, pact structure, high positioning accuracy of the direction of development。 （ 5）發(fā)展具有節(jié)能、儲(chǔ)能功能的高效系統(tǒng)； (6) to further reduce the noise。 （ 3）進(jìn)一步改善調(diào)節(jié)性能，提高動(dòng)力傳動(dòng)系統(tǒng)的效率； (4) development and mechanical, hydraulic, power transmission of the posite portfolio adjustment gear。 hydraulic torque converter to the development of highpower products, parts and ponents to improve the manufacturing process tech nology to improve reliability, promote puteraided technology, the development of hydraulic torque con verter and power shift transmission technology supporting the use of 。解決辦法：采用質(zhì)量較好的密封件，提高設(shè)備的加工精度。避免頻繁改變液流方向，無法避免時(shí)應(yīng)做好減 振措施。溫 度升高將導(dǎo)致內(nèi)外泄漏增大，降低其機(jī)械效率。外漏會(huì)造成工作介質(zhì)的浪費(fèi)，污染機(jī)器和環(huán)境，甚至 引起機(jī)械操作失靈及設(shè)備人身事故。如果處理不當(dāng)，泄露不僅污染場(chǎng)地，而且還可能引起火災(zāi)和爆炸事故。 這種方法特別適用于復(fù)雜液壓控制系統(tǒng)，每個(gè)控制回路都與其系統(tǒng)編號(hào)相對(duì)應(yīng) With mechanical transmission, electrical transmission pared to the hydraulic drive has the following advantages: 與機(jī)械傳動(dòng)、電氣傳動(dòng)相比，液壓傳動(dòng)具有以下優(yōu)點(diǎn)： 1, a variety of hydraulic ponents, can easily and flexibly to layout. 液壓傳動(dòng)的各種元件，可以根據(jù)需要方便、靈活地來布置。 對(duì)于執(zhí)行元件和控制元件，演示文稿都是基于相應(yīng)回路圖符號(hào)，這也為介紹回路圖符號(hào)作了準(zhǔn)備。 Hydraulic system and hydraulic power control signal is posed of two parts, the signal control of some parts of the hydraulic power used to drive the control valve movement. 液壓系統(tǒng)由信號(hào)控制和液壓動(dòng)力兩部分組成，信號(hào)控制部分用于驅(qū)動(dòng)液壓動(dòng)力部分中的控制閥動(dòng)作。 directional control valve includes a oneway valve , oneway fluid control valve, shuttle valve, valve and so on. Under the control of different ways, can be divided into the hydraulic valve control switch valve, control valve and set the value of the ratio control valve. 控制元件 (即各種液壓閥 )在液壓系統(tǒng)中控制和調(diào)節(jié)液體的壓力、流量和方向。 special antenna technology giant with control devices, measu rement buoys, movements such as rotating stage。在 1955 年前后 , 日本迅速發(fā)展液壓傳動(dòng) ,1956 年成立了“液壓工業(yè)會(huì)”。液壓元件大約在 19 世紀(jì)末 20 世紀(jì)初的 20 年間，才開始進(jìn)入正規(guī)的工業(yè)生產(chǎn)階段。s principle of hydrostatic pressure to drive the development of an emerging technology, the United Kingdom in 1795 ? Braman Joseph (Joseph Braman ,17491814), in London water as a medium to form hydraulic press used in industry, the birth of the world39。1910 年對(duì)液力傳動(dòng) (液力聯(lián)軸節(jié)、液力變矩器等 )方面的貢獻(xiàn)，使這兩方面領(lǐng)域得到了發(fā)展。 operating machinery engineering machinery, construction machinery, agricultural machinery, automobiles, etc.。 The role of dynamic ponents of the original motive fluid into mechanical energy to the pressure that the hydraulic system of pumps, it is to power the entire hydraulic system. The structure of the form of hydra ulic pump gears are generally pump, vane pump and piston pump. 動(dòng)力元件的作用是將原動(dòng)機(jī)的機(jī)械能轉(zhuǎn)換成 液體的壓力能，指液壓系統(tǒng)中的油泵，它向整個(gè)液壓系統(tǒng)提供動(dòng)力。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。 operative or hydraulic cylinder with hydraulic motors, according to the actual requirements of their choice. 液壓動(dòng)力部分采用回路圖方式表示，以表明不同功能元件之間的相互關(guān)系。如果與執(zhí)行元件伸出相對(duì)應(yīng)的元件標(biāo)識(shí)符為偶數(shù)，則與執(zhí)行元件回縮相對(duì)應(yīng)的元件標(biāo)識(shí)符則為奇數(shù)。 4, to achieve ove