【正文】 路，或檢查實(shí)驗(yàn)臺(tái)上搭建的液壓回 路是否正確（各接管連接部分是否插接牢固）。 2．該實(shí)驗(yàn)占總實(shí)驗(yàn)成績(jī) 25%（按所做過(guò)的實(shí)驗(yàn)抽簽選作）。 通過(guò)實(shí)驗(yàn)了解利用回油節(jié)流調(diào)速回路控制液壓系統(tǒng)中執(zhí)行元件運(yùn)動(dòng)速度的有效性及其這種回路的優(yōu)、缺點(diǎn)。 四、實(shí)驗(yàn)原理及步驟 １．實(shí)驗(yàn)原理 ? 將調(diào)速閥串聯(lián)在液壓缸的回路上，即可構(gòu)成回油節(jié)流調(diào)速回路。如上圖為利用兩個(gè)直動(dòng)式溢流閥分別控制兩級(jí)壓力的二級(jí)壓力控制回路。 （ 3）緩慢調(diào)節(jié)節(jié)流閥或調(diào)速閥調(diào)節(jié)旋鈕，以使節(jié)流口逐漸增大（其調(diào)節(jié)量以速度傳感器的測(cè)速精度相適應(yīng)），測(cè)定并記錄工作液壓缸活塞的運(yùn)動(dòng)速度以及調(diào)節(jié)量。 2） 接通電源，將二位四通電磁換向閥接入電氣控制面板的插座中，啟動(dòng)電氣控制面板上的開關(guān)。熟悉這些基本回路，對(duì)于了解整個(gè)液壓系統(tǒng)會(huì)有較大的幫助。 實(shí)驗(yàn)四 多缸順序控制回路 （設(shè)計(jì)型） 一、實(shí)驗(yàn)?zāi)康? 熟悉多個(gè)執(zhí)行元件的順序控制回路設(shè)計(jì)； 熟悉壓力順序閥的作用 認(rèn)識(shí)元件及組裝回路。 ? 壓力控制順序動(dòng)作回路：是利用液壓回路中壓力的差別，如順序閥、壓力繼電器等動(dòng)作發(fā)出控制信 號(hào)，使執(zhí)行元件按預(yù)定順序動(dòng)作。左行到終點(diǎn)，缸 A 活塞的擋鐵壓下行程開關(guān) 3CK，電磁鐵 2DT斷電，壓力油又進(jìn)入缸 B 的左腔，活塞也返回，缸 B 實(shí)現(xiàn)動(dòng)作 4，完成一個(gè)自動(dòng)循環(huán)，活塞均退回原位，為下一循環(huán)作好準(zhǔn)備。見圖 2 壓力繼電器的順序動(dòng)作回路 （ 2）實(shí)驗(yàn)步驟 檢查 在實(shí)驗(yàn)臺(tái)上搭建的液壓回路是否正確。 四、實(shí)驗(yàn)結(jié)果分析及實(shí)驗(yàn)報(bào)告要求 ： 畫出所設(shè)計(jì)的液壓回路（畫出多種并符合要求 的建議評(píng)定成績(jī)考慮加分）。 （英文版 ） Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of prehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen innerparty supervision of major initiatives. The two regulations supporting each other, the code adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard。 the fourth part on how to grasp the implementation of the two regulations of the party. code and Regulations revised the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and Chinese Communist Party discipline and Punishment Regulations column 1 by 2020 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation。s eighteen years prehensive strictly practice. (a) revised two regulations of the party need of the ICAC guidelines in in 1997 Leaders as members of the Communist Party of China clean politics certain criteria (Trial) based on revised, the promulgation and implementation of January 2020, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too plicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice。 two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of misconduct lack necessary and serious responsibility to pursue。s eighteen years strict political discipline and political rules, anization and discipline and to implement the central eight provisions of the spirit against the four winds and other requirements into Disciplinary provisions. Not one pace reachs the designated position, focusing on in line with reality, pragmatic and effective. After the revision of major changes, major changes in the code and rule modified and needs to grasp several key problems (a) code code adhere to according to regulations governing the party and party with morals in bination, for at the present stage, the leadership of the party members and cadres and Party members in existing main problems of selfdiscipline, put forward principles, requirements and specifications, showing Communists noble moral pursuit, reflected at all times and in all over the world ethics from high from low 5 mon requirements. One is closely linked to the selfdiscipline, removal and no direct relation to the provisions of . the second is adhere to a positive advocate, eight prohibition 52 are not allowed to about the content of the negative list moved into synchronization amendment cases . Three is for all the party members, will apply object from the leadership of the party members and cadres to expand to all Party members, fully embodies the prehensive strictly required. The fourth is prominent key minority, seize the leadership of the party members and cadres is the key, and put forward higher requirements than the ordinary Party members. Five is to simplify, and strive to achieve concise, easy to understand, easy to remember. The revised code is the ruling Party since the first insists on a positive advocate forAll Party members and the selfdiscipline norms, moral declaration issued to all members of the party and the National People39。s several generation of leaders, especially Xi Jinping, general secretary of the important discussion, refer to the three discipline and eight points for attention statements, and reference some embody the Chinese nation excellent traditional culture essence of epigrams. (2) the revised regulations, the main changes in the revised Regulations to fully adapt to the strictly requirements, reflects the according to the regulations governing the law of recognition of deepening, the realization of the discipline construction and Jin Ju. rule is party a ruler, members of the basic line and follow. And the majority of Party members and cadres of Party anizations at all levels should adhere to the bottom line of thinking, fear discipline, hold the bottom line, as a preventive measure, to keep the party39。s discipline, die van ply with national laws and regulations。s purpose. 8 of these regulations, a total of three series, Chapter 15, 178, more than 24000 words, after the revision of the regulations a total of 3 series, Cha