Research And Analysis Of The Horizontal Directional Drill's Part

Trenchless Technology began in 1970's in the western countries. It used the petro technology in city building. It is a new high-tech practical technology that can laid, repairs and replace all kinds of underground pipeline in the smallest trench surface. The Trenchless Technology has gotten wide application and rapid development , because it doesn't destroy the road and environment ,but has high economic efficiency. In all the trenchless machineries, horizontal direction drilling is the most popular and widely in the user, because of its rapid construction, small environmental pollution and high economic performance.Horizontal Directional Drill's part's primary includes: chassis, drill frame, pipe auto load, power head, anchor, engine, cover, electric, hydraulic, mud, mud mixing, operation platform, cab, adapt crane, air condition etc.In the chassis design, because we have the perfect system of design in the track chassis. So it is relatively simple in design chassis. It's main work is that depend on the weight of the machine. Then choose the right track and gearbox. Make sure that it can work well in the condition of the worst conditions. In this process, we should calculate the pressure of soil, travel speed, origin place swerve, track puff etc.Drill frame is one of the main part of the machine. When it work, the max force and torque pass through the drill frame. Traditional drill frame's intension and rigidity calculate depend on material mechanics. Because the model isn't exactitude, it has been carried through plenty of predigest. So it's calculation result isn't exactitude. We often use analogy in designing the drill frame: consult the coequality of the machine. And the same time, because we lack of particular calculation, we must increase the safety modulus. So we waste the material. Along with the development of the computer, especially the finite element analysis program predigest, make it more suppleness to mechanics analysis. In this article, author put up by using ANSYS, using the Pro/E to building modules. Utilize this kind of software, we can process element compartmentalize, module obligation and add force. It can also save result. Depend on the result, we change the thickness of material, and do it again. At last, we get what we want.The power of the engine is the source of the machine. All the actions depend on it. The power depend on the work conditions. Because in construction, the condition of machine is very complex, it will waster if we choose the engine by the worst work conditions. In our country, we chose engine by analogy method. According the author attitude, we have a good way of chose the engine.The power head is another main part of the machine. The machine can work well depend on the power head. It's main parameter is the torque. Representative power head has two way: rapid speed and low speed. Low speed use the low speed motor qua drive. Rapid speed use the rapid motor, it drive the gearbox to reduce it speed. The main difference between them is that the set isn't same.There are three methods in power head moving. One is gear transmission, another is chain wheel transmission, and the third one is cylinder-chain transmission. There are difference characteristic. gear transmission can impress more force, circulate placidity, but it manufacture hard, especially machining difficulty. cylinder-chain transmission is the cheapest way to produce the machine, it has the best high efficiency in transmission. For it has no gearbox and motor, it moving depend on the cylinder, so it has the best efficient. But it has some disadvantage such as it is difficult to fit and repair. Especially the chain is in crustily condition. Chain wheel transmission advantage and disadvantage between then.In the design of domestic horizontal direction drilling, without the scientific calculation method, designers find the inadequacy of the structure form by analogy method, especially in the design of agencies intensity and rigidity. High safety coefficient brings a lot of waste, increases the weight of the drilling and improves the manufacturing and transports cost. With many years of experience, this article expounds the horizontal direction drilling operating system detailed, simulate and analyze the drilling frame and power head using the Finite Element Analysis and research the hydraulic system effectively.Based on the study of the structure design of horizontal direction drilling, this article provides the principle and methods of the pilot hole design, chassis design, power system design and hydraulic system design in the horizontal direction drilling design, at the same time, this article offers the scientific computing methods of the drilling frame design, in order to provide the theory computational basis of the reasonable design of the horizontal direction drilling.