英文原文The vertical Boom-type Roadheader design1 IntroductionMechanical 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 Boom-type roadheader (the roadheader) to the overall design of the merits of complete machine play a decisive role, and the decision of the assembly, the system, coordination between the various components of the unity and match, to obtain the high-end performance and overall better economic efficiency technology.Roadheader design, including the following:1)According to design project description choice type and various cellular construction pattern2) Decides the complete 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 complete machine system composition 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 components and structural type, drive, and the overall layout of the reasonableIn 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.2.1 the selected modelsAccording 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 semi-Coal Lane, the compressive strength of coal and rock one-way (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 one-way compressive strength, the type of selected models.2.2 the structure of the various components, the way the driver identifiedRoadheader 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 components.1) Cutting agencies. Cutting the drive from AC motor-driven, in the transmission system located in the general profile coupling with no mechanical overload protection device, the two planets reducer driven spindle front of the cutting head.Some sections of the working bodies boring machine has cut chain, disc-milling and cutting-such as cantilever. Cantilever due to the cutting-boring 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 Cutting-and has become 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 line-cutting head of the advantages are: Transmission convenient, compact and can be cut to any shape of the profile, easy access to the formation of a cross-section 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 shortcomings: 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 components. They were driven or focus may be linked, either by AC motor drive, can also be used hydraulic motor drive.Trailing claw-is 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 rake-wheel-claw simple, high intensity, reliable, but with less bulk materials.Loading agency programme is not only the installati