本文選題：采煤機(jī) + 截割阻力矩�。� 參考：《重慶大學(xué)》2015年碩士論文

【摘要】：作為煤炭綜采工作面的一種主要采掘設(shè)備,采煤機(jī)被廣泛應(yīng)用于各大小煤礦,其功能是割煤和裝煤。采煤機(jī)的割煤主要是利用滾筒上的截齒與煤巖進(jìn)行沖擊和碰撞,從而達(dá)到實(shí)現(xiàn)煤巖脫落的目的。采煤機(jī)的裝煤主要是通過滾筒螺旋葉片的螺旋面實(shí)現(xiàn)的,因此截割部的性能直接決定了采煤機(jī)工作性能。由于當(dāng)前采煤機(jī)的滾筒轉(zhuǎn)速是恒定的,都是通過調(diào)節(jié)牽引速度以適應(yīng)煤層變化,導(dǎo)致粉塵大、塊煤率低、工作環(huán)境惡劣等問題,對(duì)采煤機(jī)截割性能的提高產(chǎn)生極大的局限性。為此本文以傳統(tǒng)采煤機(jī)為基礎(chǔ)進(jìn)行了分析研究,設(shè)計(jì)了一種可以實(shí)現(xiàn)滾筒轉(zhuǎn)速調(diào)節(jié)的采煤機(jī)截割傳動(dòng)系統(tǒng),使采煤機(jī)在各種煤層條件下都有較好地適應(yīng)性。①對(duì)采煤機(jī)的結(jié)構(gòu)、煤巖的物理機(jī)械特性、切削厚度和滾筒負(fù)載特性進(jìn)行了分析,得出牽引速度與滾筒轉(zhuǎn)速對(duì)切削厚度和滾筒負(fù)載的影響,最終分析得出滾筒轉(zhuǎn)速調(diào)節(jié)的必要性。②在分析采煤機(jī)工作過程和行星齒輪機(jī)構(gòu)的基礎(chǔ)之上,進(jìn)行了不同傳動(dòng)方案的選擇,最終,在傳統(tǒng)采煤機(jī)截割系統(tǒng)的基礎(chǔ)上,設(shè)計(jì)了一種可以實(shí)現(xiàn)滾筒轉(zhuǎn)速調(diào)節(jié)的液壓混合動(dòng)力截割傳動(dòng)系統(tǒng),其中,差動(dòng)行星齒輪的輸入端分別傳遞截割電機(jī)和液壓馬達(dá)的動(dòng)力,液壓馬達(dá)的動(dòng)力則來自于調(diào)高系統(tǒng)的液壓功率。其利用了行星齒輪差動(dòng)動(dòng)力耦合功能,通過改變液壓泵的排量可以實(shí)現(xiàn)滾筒轉(zhuǎn)速的調(diào)節(jié)。此外,還進(jìn)行了機(jī)械傳動(dòng)系統(tǒng)和液壓傳動(dòng)系統(tǒng)的參數(shù)匹配。③建立了行星齒輪、液壓泵、液壓馬達(dá)等系統(tǒng)主要部件的數(shù)學(xué)模型,基于AMESim和MATLAB/Simulink軟件平臺(tái)進(jìn)行了主要部件仿真模型、系統(tǒng)仿真模型、負(fù)載模型和PID控制模型的建立。進(jìn)行了AMESim-Simulink聯(lián)合仿真,對(duì)液壓馬達(dá)轉(zhuǎn)速和滾筒轉(zhuǎn)速的跟蹤性能、動(dòng)態(tài)響應(yīng)及緩沖性能進(jìn)行了仿真分析。驗(yàn)證了所設(shè)計(jì)液壓混合動(dòng)力截割傳動(dòng)系統(tǒng)的可行性。結(jié)果表明,液壓馬達(dá)轉(zhuǎn)速及滾筒轉(zhuǎn)速具有較好的跟蹤性能和動(dòng)態(tài)響應(yīng),液壓系統(tǒng)可以緩和負(fù)載突變產(chǎn)生的沖擊。
[Abstract]:As one of the main mining equipment in fully mechanized coal mining face, the shearer is widely used in all kinds of coal mines, and its function is to cut and load coal. The coal cutting of shearer is mainly to impact and collide with coal and rock by means of cutting teeth on the drum, so as to achieve the purpose of coal and rock shedding. The coal loading of the shearer is mainly realized by the helical surface of the spiral blade of the drum, so the performance of the cutting part directly determines the working performance of the shearer. At present, the rotary speed of the shearer is constant, which is caused by adjusting the traction speed to adapt to the change of coal seam, which leads to the problems of large dust, low lump coal rate and bad working environment, which has great limitations on the improvement of cutting performance of shearer. In this paper, based on the analysis of traditional shearer, a cutting drive system of shearer is designed, which can adjust the rotational speed of drum, so that the shearer has better adaptability to shearer structure under various coal seam conditions. The physical and mechanical characteristics of coal and rock, cutting thickness and roller load characteristics are analyzed, and the influence of traction speed and drum speed on cutting thickness and cylinder load is obtained. Finally, it is concluded that the necessity of drum speed regulation .2 on the basis of analyzing the working process of shearer and planetary gear mechanism, different transmission schemes are selected. Finally, on the basis of cutting system of traditional shearer, A hydraulic hybrid power cutting drive system which can adjust the rotational speed of the cylinder is designed, in which the input end of the differential planetary gear transfers the power of the cutting motor and the hydraulic motor, respectively. The power of the hydraulic motor comes from the hydraulic power of the system. By using the differential dynamic coupling function of planetary gear, the rotary speed of the cylinder can be adjusted by changing the displacement of the hydraulic pump. In addition, the mathematical models of the main components of the planetary gear, hydraulic pump and hydraulic motor are established by matching the parameters of the mechanical transmission system and the hydraulic transmission system. The simulation model of the main components is carried out based on the software platform of AMESim and MATLAB/Simulink. System simulation model, load model and PID control model. The tracking performance, dynamic response and buffer performance of hydraulic motor and drum speed are simulated and analyzed by AMESim-Simulink simulation. The feasibility of the hydraulic hybrid power cutting drive system is verified. The results show that the hydraulic motor speed and drum speed have better tracking performance and dynamic response, and the hydraulic system can mitigate the shock caused by the sudden change of load.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD421.6

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