【正文】 式運行阻力較小，履帶架底部與履帶 鏈相接觸磨損小。履帶架底部裝設 的支重輪，每個承載力應不小于機重 50％，間距一般為履帶板節(jié)距的 倍。 系統(tǒng)的額定工作壓力不 宜高于 20~25MPa。選用泵和馬達的安裕度應為 左右。 5)電控系統(tǒng)主要技術參數(shù)的確定 電控系統(tǒng)的供電電壓應按掘進機機型大小來確定壓等級，特輕型、輕型機應 選 660V，中、重型機 型應選 660V/1140V。 6)其他輔助系統(tǒng) 1)外噴霧系統(tǒng)，噴嘴設置在截割機構懸臂的前端水壓為 MPa。對截割巖石的情況下應適當提高水壓和水量。 4．進行必要的總體計算及系統(tǒng)圖等 在掘進機總體設計和總體布置完成之后， 整機的各個系統(tǒng)和主要部件的主要 結構、技術參數(shù)己基本確定，對整機應進行必要的總體計算及系統(tǒng)圖等。 2）各部件傳動系統(tǒng)和液壓電控系統(tǒng)的功率計算。 4）繪制傳動、液壓、電控系統(tǒng)圖。 5. 結語 掘進機的總體設計是掘進機設計工程中技術設計的 個組成部分。 本文所述掘進機的總體設計仍然是以傳統(tǒng)設計為基礎，在動力學、運動學、 受力計算等方面應廣泛應用現(xiàn)代設計方法，如概念設計、三維設計運動學、動力 學仿真技術、有限元設計、優(yōu)化設計等。 The vertical Boomtype Roadheader design 1 Introduction Mechanical design is in the process of product design and an important part of the main links, it is followed in programme design after the design work. The vertical Boomtype roadheader (the roadheader) to the overall design of the merits of plete machine play a decisive role, and the decision of the assembly, the system, coordination between the various ponents of the unity and match, to obtain the highend performance and overall better economic efficiency technology. Roadheader design, including the following: 1)According to design project description choice type and various cellular construction pattern 2) Decides the plete machine the main technical performance parameter, Including size parameter, heavy parameter, the parameter of movement and the technical economy refer parameter, 3) According to system design performance requirement, definite plete machine system position and between them match as well as each part main technical senate parameter, 4) The necessary whole, and the mapping of transmission, hydraulic, electronic control systems, and other plans. 2 the selected models and various ponents and structural type, drive, and the overall layout of the reasonable In determining the content, first task should be designed to meet the contents, especially the users of the main demands of the investigation, the two sides exchanged views repeatedly, to satisfy both users (or superior) conditions, can better meet the product development of the overall plan. the selected models According to roadheader use, for the coal mine tunnel boring or used for other sectors of the works, roadheader working conditions for cutting coal roadway or semiCoal Lane, the pressive strength of coal and rock oneway (or the value of platts coefficient f) and the rock abrasion factor. At the same time the control line should be superscript MT138 ~ 1995 cantilevered Roadheader types and parameters, according to cutting coal and rock the biggest oneway pressive strength, the type of selected models. the structure of the various ponents, the way the driver identified Roadheader by cutting general agencies, shipping agencies, walking, hydraulic system, electronic control systems and auxiliary devices (such as dust removal devices, security devices, remote monitoring devices) and other ponents. 1) Cutting agencies. Cutting the drive from AC motordriven, in the transmission system located in the general profile coupling with no mechanical overload protection device, the two plas reducer driven spindle front of the cutting head. Some sections of the working bodies boring machine has cut chain, discmilling and cuttingsuch as cantilever. Cantilever due to the cuttingboring machine body flexible, relatively small, can cut a variety of shapes and sections of the roadway, and to achieve selective cutting, but cutting good effect, a higher rate of boring, so now used mainly cantilever Cuttingand has bee boring machine working body of a basic pattern. By cutting head of the layout, is divided into horizontal and vertical axis of the two. The linecutting head of the advantages are: Transmission convenient, pact and can be cut to any shape of the profile, easy access to the formation of a crosssection and is conducive to expansion in the use of cantilever, or ditch digging, in Waterloo. Cutting head the shape of a cylindrical, cone and the cone and cylindrical, as the latter two cutting head to drilling, and the cutting surface than the formation, use it more. This is the work of the shortings: As the longitudinal axis of cutting head in the horizontal swing at the cutting reaction force is not passed machine centres, with cantilevered form of torque to boring machine have a greater vibration, stability is poor. Therefore, the coal roadway excavation, the need to increase the body weight or support the installation of auxiliary equipment. At present, such a boring machine in some sections of the use of more boring machine. 2) Shipment of bodies. It generally from the middle loading and conveyor ponents. They were driven or focus may be linked, either by AC motor drive, can also be used hydraulic motor drive. Trailing clawis to use a turn moves the rake claws to continue to rake materials and in a reprint from transport operators. This structure is simple, reliable, small form factor, loading good effect, the application is widespread. However, such institutions loading width restricted (because boring machine running track when agencies generally do not arouse). To expand the loading width, will shovel the entire harrow board, together with the claw agencies in the level of swing, or design dual rake claws, to expand the scope of loading. Institutions than the rakewheelclaw simple, high intensity, reliable, but with less bulk materials. Loading agency programme is not only the installation of the clawrakewheel can also be installed, the two can be used interchangeably. Usually, the choice rake clawloaded, but considering loading width of the problem, may choose to double rake claws, can also be designed to rake clawround interchangeable with the loading mechanism. Some sections b