【正文】 按公式式中：p——關(guān)內(nèi)最高工作壓力（MPa） d——油管內(nèi)徑（㎜）[бp]——油管材料許用應力對于鋼管，[бp]=бb/n（бb為材料的抗拉強度，n為安全系數(shù)）當p≦，n為6；當p≧，n=4代入數(shù)據(jù)得壓力油管路：p=28MPa，n=4，δ≧㎜回油管路：p=，n=6，δ≧㎜控制油管路：p=，n=6，δ≧㎜（3） 油管安裝要求由于系統(tǒng)對油液的精度要求較高，全部管路應進行一次安裝、一次安裝后拆下管道，清洗后干燥，涂油以及進行壓力試驗。在盡量小的閥塊上通過打最少的孔達到最優(yōu)的結(jié)構(gòu)，這是閥塊的設(shè)計的指導思想。閥塊上的兩個電磁換向閥控制著激振器前的液控單向閥。(1)計算左右支撐立板尺寸由所選激振器液壓缸的尺寸以及考慮到試驗臺所測試的液壓阻尼器的尺寸初步擬定立板的側(cè)面為A＝lh＝1400840＝106mm2。由于螺柱材料是塑性的，可根據(jù)第四強度理論，求出螺栓預緊狀態(tài)下的計算應力為：故螺栓危險截面的拉伸強度條件為：式中，F(xiàn)0—為螺栓所受的預緊力，單位為N；　　　d1—螺栓危險截面的直徑，mm； ［σ］— 螺栓材料許用應力，MPa。加長桿做成一系列的不同的長度，然后根據(jù)試驗要求通過增加或減少各種加長桿來達到試驗所需的長度。對其進行彎曲校核，由于當兩滑板都位于中間時，軸承受的彎曲應力最大，故設(shè)兩滑板質(zhì)量都集中于軸中間，軸同時還承受拉應力，故為拉彎組合。液壓油源控制采用可編程控制器實現(xiàn)液壓站的各種邏輯控制功能，各種檢測及控制信號通過輸入繼電器將各部分相關(guān)信息送入ＰＬＣ，經(jīng)ＰＬＣ中控制程序進行邏輯處理后，由輸出繼電器去完成泵組啟停 、故障指示、報警及保護等相關(guān)控制操作。油泵電機控制每臺泵電機均可以單獨啟動或停止；也可以事先選定電機后按程序邏輯設(shè)置自動順序啟動。動靜態(tài)試驗油路切換控制動靜態(tài)試驗通過一個電液換向閥、兩個電磁換向閥和4個液控單向閥的切換來完成。當發(fā)現(xiàn)濾油器堵塞后，停機后更換濾芯。偏差信號經(jīng)過整流、放大后輸入伺服閥的控制端，控制伺服閥產(chǎn)生旨在減小偏差信號的運動，從而使系統(tǒng)的位置與指令信號期望的位置趨于一致。卜老師專業(yè)知識淵博，治學態(tài)度嚴謹，精益求精的工作作風，誨人不倦的高尚師德，嚴以律己、寬以待人的崇高風范，對我產(chǎn)生了深遠的影響。 (2), the settops for a board to replace the sophisticated irrigation valves, such as the electrohydraulic servo valve。YR Position Control of An Electro Hydraulic ServoCylinder, Vibration, Control Engineering, Engineering of Industry, 1991，34 (3)： 370376.[21] Fitch, E. C., I. T. Hong, “Computerized Hydraulic System Design and Analysis,” BarDyne, Inc., 1996.[22] Fu K S. Learning Control SystemReview and Outlook. IEEE Trans. . 外文資料 How to ensure that the normal functioning of the hydraulic systemWith the continuous development of science and technology, industrial production increased degree of automation, hydraulic and mechanical control as a professional in an independent disciplines also need to continue with the development and updating. Hyundai Heavy Industries in the hydraulic equipment widely used in largescale production lines and special operations equipment is particularly reflected in the full, hydraulic transmission technology has its unparalleled advantages, this is it to be the main reason for the rapid development, but with this At the same time, hydraulic transmission equipment has its vulnerable side, which is a prominent antipollution low capacity weaknesses, according to the information recorded, hydraulic failure 70% to 80% by the oil pollution caused. To ensure the normal hydraulic system, reliable operation, we must keep the system clean. On the proper use and maintenance of the hydraulic system to ensure that the clean oil is daytoday maintenance of equipment and use of an important work. The hydraulic system of pollution control throughout the hydraulic system for the design, manufacture, installation, use and maintenance of the entire process, the basic content and purpose primarily through pollution prevention and control measures, allowing the system to maintain the degree of pollution in the system of key Pressure ponents within the tolerance of pollution, to achieve a reasonable balance to ensure that the work of the hydraulic system reliability and service life of ponents. The hydraulic system of pollutants equivalent to the total pollutants out the existing system with less invasive system to eliminate pollutants out of pollutants Thus, the hydraulic system of the Oil Pollution Control There are two main measures: First, to prevent pollutants invasive system, two of the oil filter purification system. First, oil pollution on the main hazards are as follows: 1. Wear ponents of the oil pollution of all kinds of pollutants from various forms of wear ponents, solid particles into the gap in the movement of the surface of cutting parts wear or fatigue wear. Highspeed flow of solid particles on the surface ponents of the impact caused erosion. Oil in water and oil degeneration of oxide product ponents to the corrosive effect. In addition, the oil gas in the air caused erosion, leading to erosion and destruction of the surface ponents. 2. Plug the card ponents and solid particles bear failure of the hydraulic valve plug the gaps and holes, and obstruction caused spool cards bear, affecting work performance, or even lead to serious accidents. 3. Oil accelerated the deterioration of oil in the water and air for its thermal oxide is the main condition for oil and oil in the oil on the metal oxide particles play an important catalytic role, in addition, oil suspended in water and bubbles Significantly reduce the movement of the strength of Film, lubricating properties decreased. Second, the source of pollutants: Oil system in the way the source of major pollutants in the following areas: Invasion of pollutants: external invasion is the main pollutants in the atmosphere sand or dust, often pore through the fuel tank, the fuel tank of the shaft closures, pumps and motors, and other invasive system the shaft. Is the use of environmental impact. Internal pollutants: ponents in the processing, assembly, testing, packaging, storage, transportation and installation, and other aspects of the residue of pollutants, of course, these processes can not be avoided, but can be reduced to a minimum, some special ponents in the assembly and debugging The need to clean room or clean Taiwan39。謝辭經(jīng)過12周的，本次設(shè)計和論文能圓滿完成。差動式位移傳感器和激振器的活塞軸的運動同步，將位移信號轉(zhuǎn)換成電信號。油箱液位控制與安全保護當油箱中液位高度高于或低于高低液位計的設(shè)定值，泵電機停止工作，操作面板上指示燈亮，并發(fā)出報警信號，泵組停止工作。當液壓系統(tǒng)壓力異常時，電控能進行保護和顯示?？筛鶕?jù)具體要求完成其它控制。隨著控制技術(shù)發(fā)展的不斷發(fā)展，液壓油源控制系統(tǒng)多采用可編程控制器作為控制系統(tǒng)核心，以達到簡化控制系統(tǒng)的構(gòu)成，提高可靠性。由于本實驗為動態(tài)脈沖應力，故不能按常規(guī)計算，查機械設(shè)計手冊得其基本許用應力為。左側(cè)滑板固定兩個位移傳感器，右側(cè)滑板凸臺放置力傳感器。(2)支撐板與座連接設(shè)計支撐板與底座采用雙頭螺柱連接，由受載分布情況，采用8個雙頭螺柱沿中心線對稱布置，以保證連接接合而受力比較均勻。： 液壓阻尼器試驗臺架試驗臺架主要由安裝平臺、左右支撐立板、左右滑動板、兩根導向軸、液壓激振器、位移傳感器、拉壓（力）傳感器、長度調(diào)節(jié)桿、液壓閥塊C等組成。閥塊B安裝在油箱頂部，其上有兩個電磁換向閥和一個減壓閥。系統(tǒng)中各閥集成到一起也便于安裝、調(diào)試和操作。v=3m/s得d=22mm回油管路：q1=530L/min。在泵站的裝配中，主要使用焊接時管接頭連接。液壓系統(tǒng)中，金屬管之間，金屬管與元件之間的連接，可采用焊接連接，法蘭連接和管接頭連接。 冷卻器分為水冷式和風冷式，設(shè)計中選用的時水冷式，水冷式又分為多管式，板式，片式，選用的是較常用的多管式。系統(tǒng)散熱情況與環(huán)境溫度有很大關(guān)系，與季節(jié)，地區(qū)，工作環(huán)境等都有很大關(guān)系。⑤ 磁性過濾器在油箱中如果放置幾塊磁鐵，可以吸附油液中一些磁性顆粒，特別是對吸附那些用其他手段無法濾除的微小磁性顆粒十分有效。