需要金幣:![]() ![]() |
資料包括:完整論文 | ![]() |
![]() |
轉(zhuǎn)換比率:金額 X 10=金幣數(shù)量, 例100元=1000金幣 | 論文字?jǐn)?shù):9941 | ![]() | |
折扣與優(yōu)惠:團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式:Word格式(*.doc) | ![]() |
摘要:顎式破碎機(jī)是一種常見的破碎機(jī)械,主要破碎不同硬度和性質(zhì)的物料。當(dāng)遇到被壓物料的抗壓強(qiáng)度不均勻時(shí),可能出現(xiàn)由于物料太硬而導(dǎo)致無法壓碎。在這種過載的場合,鄂式破碎機(jī)需要良好自我保護(hù)系統(tǒng),讓不能壓碎的硬物料順利通過鄂板,且顎式破碎機(jī)又能迅速恢復(fù)正常的工作狀態(tài),避免出現(xiàn)鄂板損傷和機(jī)構(gòu)破壞等嚴(yán)重后果。 現(xiàn)有的過載保護(hù)裝置中,液壓過載保護(hù)有明顯的優(yōu)越性,具體表現(xiàn)為過載后能可靠保護(hù)、自動(dòng)排除故障、較快復(fù)位以恢復(fù)正常生產(chǎn),無需更換零部件,同時(shí)便于微機(jī)操作和控制,易于實(shí)現(xiàn)破碎過程自動(dòng)化等優(yōu)點(diǎn)。因此液壓保護(hù)裝置也越來越得到廣泛的應(yīng)用,也是顎式破碎機(jī)發(fā)展趨勢之一。 本設(shè)計(jì)主要研究了關(guān)于顎式破碎機(jī)的液壓過載保護(hù),通過調(diào)定幾個(gè)壓力開關(guān)的開啟壓力,對(duì)液壓缸充、卸油壓,使液壓缸活塞呈剛性支承或可收縮狀態(tài),進(jìn)而實(shí)現(xiàn)破碎和過載保護(hù)的功能。設(shè)計(jì)中采用了PLC控制電磁鐵的順序動(dòng)作,實(shí)現(xiàn)各個(gè)液壓閥處于不同的工作位置,控制過程安全可靠且易于操作,反應(yīng)快速,自動(dòng)化程度高。 關(guān)鍵字:顎式破碎機(jī) 過載保護(hù) 液壓 排障
ABSTRACT:Jaw crusher is a common crushing machinery, the main crushing different hardness and the nature of the material. When subjected to a compressive strength of crushed material uneven, may appear that material is too hard to crush. In place of the overload, mandibles crusher need good self-protection system to let can not crush the hard material through hubei board, and jaw crusher can quickly return to normal working condition, avoiding damage serious consequences such as hubei board damage and institutions. Current overload protection device, the hydraulic overload protection has obvious superiority, reliable after embodied in overload protection, automatic troubleshooting, fast reset to restore the normal production, need to replace parts, at the same time facilitate microcomputer operation and control, easy to implement crushing process automation, etc. So the hydraulic protection also more and more widely used, it is also one of development trend of jaw crusher This design is mainly studied about the jaw crusher of hydraulic overload protection, through the opening pressure setting for pressure switch, oil pressure of hydraulic cylinder charge and discharge to the hydraulic cylinder piston is rigid support or contracting, thus can realize the function of broken and overload protection. PLC control is adopted in the design of the order of the electromagnet action, realize the all hydraulic valve in different working position, the control process is safe and reliable and easy to operate, fast response, high degree of automation. Keywords: Jaw crusher;overload protection;hydraulic;discharging barrier
顎式破碎機(jī)已經(jīng)有百余年的發(fā)展歷史,廣泛運(yùn)用于煤炭、電力、冶金、化工等行業(yè)。因其能破碎各種不同硬度、不同性質(zhì)的物料,且結(jié)構(gòu)簡單,造價(jià)低,以上幾種優(yōu)點(diǎn)決定了它在破碎作業(yè)中的主導(dǎo)作用。其中又分為簡擺式和復(fù)擺式兩種,鑒于復(fù)擺式較簡擺式具有生產(chǎn)效率高、重量輕和設(shè)備成本低等突出優(yōu)點(diǎn),所以現(xiàn)代破碎機(jī)正逐漸向復(fù)擺式顎式破碎機(jī)方向發(fā)展。當(dāng)然由于破碎機(jī)工作環(huán)境非常惡劣,負(fù)荷波動(dòng)大等原因,破碎機(jī)在工作過程中常常因?yàn)榱险希ㄈ肓喜痪鶆蚧蛘咚胛锪蠟闃O硬極強(qiáng)的不可破碎物)而出現(xiàn)大幅的過載現(xiàn)象,因此顎式破碎機(jī)都需要專門的過載保護(hù)措施,目前主要有以下幾種方法:肘板折斷法、飛輪限矩保護(hù)以及液壓過載保護(hù),其中液壓過載保護(hù)是一種新型的保護(hù)方式,它較前兩種傳統(tǒng)方法更可靠且事故狀態(tài)下不需停機(jī)可直接處理,使強(qiáng)度大的物料能自動(dòng)落入落料包,且顎式破碎機(jī)又能迅速的恢復(fù)正常的工作。因此它更能適應(yīng)生產(chǎn)的需要,可以最大限度地保證機(jī)器連續(xù)平穩(wěn)地運(yùn)行,以此可以保證破碎機(jī)的生產(chǎn)效率和破碎質(zhì)量,所以顎式破碎機(jī)液壓過載保護(hù)是迄今最合適也是最應(yīng)該深入研究的破碎機(jī)保護(hù)措施。
|