采煤机截割部设计论文答辩

我国薄煤层资源丰富，可采储量约占总可采储量的19%，而且分布广、煤质好。薄煤层采煤机用于采高低于130mm的煤层。由于有些煤层的厚度太低普通采煤机难以进行正常开采，影响采煤的效率。对一些薄、厚煤层并存的煤矿,由于薄煤层开采速度缓慢,使其下部的中厚煤层长期得不到及时开采,以至影响工作面的正常接替,而有的就只能被迫丢失一些薄煤层资源。随着大批煤矿中、厚煤层的资源开采比较多,使得资源越来越少,所以薄煤层的开采已列入日程。研制适合的薄煤层采煤机,以适应不同的煤层结构,提高薄煤层采煤的工作效率是当务之急。 虽然薄煤层采煤机的型号、规格有许多,但它的各主要组成部分大同小异，合理选择薄煤层采煤机的截割部的参数，可以改善其工作性能和减少采煤比能耗。选择这个题目就是要进一步熟悉薄煤层采煤机各部分的工作原理，对其进行更好的改进，并对它的截割部减速器进行细致分析设计，使其耐用并且省时省力容易装修，使其在工作中能够有更好的经济效益。在参考国内外有关薄煤层采煤机的情况下，完成了截割电机功率为180KW总装机功率为450KW的截割式滚筒液压牵引采煤机的整机方案设计及对采煤机截割部进行了重点设计。主机身采用整体结构形式，取消了长螺柱及传统意义上的螺栓联接；此结构简单、可靠，且尺寸小，大大的降低了采煤机的机身高度。截割部采用四级传动前三级为直齿传动，第四级为行星传动。在前三级的直齿传动利用直齿传动设计的一般原理，设计出适合截割部的齿轮传动依次分为截一轴系，惰一轴系，截二轴系，截三轴系，，惰二轴系；采用了两个惰轴系是本设计的创新点，它即满足了传动强度的要求又满足了截割高度对截割部长度的要求。在第四级行星传动中，用运2KH行星减速器设计的原理，设计出适合截割部的一级2KH型行星减速器，并将它和滚筒直接联结，大大简化了截割部的设计，节省了材料、空间。此外对截割部上的其它部分如离合器，内喷雾系统也进行了详细设计及校合。关键词： 采煤机； 截割机构； 薄煤层采煤机； 减速器。 Thin seam of our abundant resources, recoverable reserves total recoverable reserves of 19%, but widely distributed, a good coal. Shearer for thin seam mining of coal seam height is less than 130mm. As some of the thickness of coal seam shearer too difficult to carry out normal general mining, the impact of the efficiency of coal mining. A number of thin, thick coal seam of coal co-exist, as a result of the slow pace of thin coal seam to the bottom of thick coal seam in the long-term lack of timely and mining, as well as the impact of the normal face to succeed, while others will be forced to lose some thin seam of resources. With the large number of coal mines, the thick coal seam mining more resources so that fewer and fewer resources, so thin seam mining has been included in the agenda. The development of suitable thin seam shearer in order to adapt to different coal structure and improve the thin seam coal mining efficiency is a priority.    Although the thin coal seam shearer models, specifications there are many, but it is the major component of the more or less the same, a reasonable choice of thin coal seam shearer cutting unit of the parameters, can improve their work performance and reduce energy consumption than coal. Choice of this topic is to become more familiar with the various parts of thin coal seam shearer working principle, its better to improve, and cutting it to carry out a detailed analysis of the Department of reducer design, and durability make it easy to save time and manpower on the decoration, to work to have a better cost-effectiveness. In reference of the thin coal seam shearer at home and abroad, the completion of cutting the total electric power installed capacity of 180KW to 450KW of power cutting roller-type hydraulic traction coal cutter design and the whole program of shearer cutting the focus of the design department. The overall structure of the host body form, the abolition of the long stud and bolt the traditional sense of the connection; this structure is simple, reliable, and small, greatly reducing the height of Shearer's body. Cutting unit transmission using the first three to four straight-tooth drive, the fourth-level for the planetary transmission. The former three straight straight-tooth gear drive transmission designed to use the general principles for the design of cutting unit gear drive shaft in turn is divided into a cut-off, a shaft lazy, cut-off the second shaft, the shaft cut-off c,, Second idler shaft; uses two idler shaft design innovation is the point, it is met the requirements of transmission intensity and cutting to meet the cutting height on the request of the Minister of degrees. Drive in the fourth class of planets, planetary reducer with 2KH Yun design principle, the design of cutting unit for a planetary reducer 2KH type, and its direct link roller, greatly simplifies the design of cutting unit, savings of materials, space. In addition to cutting other parts of the Department such as the clutch, with the spray system is also carried out a detailed design and school together. Keywords: shearer; cutting institutions; thin seam shearer; reducer.