英文原文Winch brake system on large-scale design of the bestRed Phosphorus Technical Institute of the Chinese Red Phosphorus Muroran Institute of Technology Muroran Japan Hitachi Machinery Motorcycle laboratory Tsugaru Strait JapanAbstract In order to adapt like the tower molding machine, makes the winch as far as possible small and light is very important. Therefore, this article reported braking systems optimum design. Because of braking systems precise controllability and so on, the disposition braking systems can improve the systems operation the security. The author studied one kind to install on the 1000kw winch brake discs pliers disc brake, this kind of winch had the 10m/s fluctuation speed.Preface:In order to do as much as possible to winch the small and light is very important. In this area of a hoist are usually equipped with disc brakes. However, in order to achieve this objective by trying to improve the braking system, particularly the improved allocation of a brake winch safety of the operation. Winch is connected with a traditional brake disc brakes. Spring-friction with the pressure in the brake disc, and pressure on the size of the device installed in the braking pressure on the hydraulic cylinder control. If any oil hydraulic cylinder seals broken, the film will be exposed to the friction in the mist. This will result in a dangerous results - reduce the pressure on the brake. To avoid this potential danger, the author of the study indicative of a new type of brake, people from the maintainability of the view to study this new type of brake agencies. As brake institutions should also be very small, 20 MPA is considered the work pressure. In order to find the best system for us to study the characteristics of system dynamics.Braking SystemWe take a typical winch (1000 kw) as a study example. There are two brake disc and four groups of institutions targeted in the brake disc. The maximum torque is when the emergencies occurs, is also when the maximum braking torque needs to drop, the maximum braking torque expresses the equality (1)In the formula = revolving components moment of inertia () = components quality () = winch spool diameter () = velocity of whirl () = when loading ropes pulling force () = when unloading ropes pulling force ()In this case, when winchs power is 1000 speeds is 100, the equilibrium value is not 100, therefore, biggest braking torque =250 has the following research institute to decide.Pliers disc brakeThe demonstration such new style braking system has a pair of clamp. The clamp clamps the brake disc with the brake pad. A on hydraulic cylinder uses for located at side the brake pad opposition to control installs in the above spring pressure. When eight braking mechanisms simultaneously affect on winchs time, equates affects a 32knm braking torque which in the brake pad center 29kn produces, if friction coefficient =0.4.Can see two pair of pliers plates separately by the pin seal in and the feather piece is fixed together on the winch. Ten helical springs place in the together spring assembly can exert 24kn the strength. The strength can through establish adjusts in the above screw rod, in order to on many kinds of specification winchs braking system as far as possible widespread application. Through controls hydraulic cylinders flowing tubing head pressure as a priming hydraulic cylinder to control the braking torque. Because braking torques hysteresis (is opposite in control signal) is because rubs causes, Therefore priming by very precise design so that eliminates pistons resistance. The elastomer material is placed together between each brake pad and the pliers plate, the goal is obtains the same contact force. A group of pliers plate brake is placed nearby brake discs two. Their relations can look. Looks like such which in the chart demonstrated that is loaded with the new style pliers plate brake and the winch has the very good union.Control systemThe braking mechanism adjusts under the safe premise, with the aim of using fully from hydraulic cylinders pressure oil applies the brake. Two brake valve connects on the hydraulic cylinder; One is a safety valve, one treadons the valve.Because in the worldwide scale must increase the work load, winchs power and the winch movements speed is getting quicker and quicker. Under this kind of environment, to maintain winchs security, braking mechanisms characteristic should improve. We had already studied control systems dynamics.Control systems dynamic simulationThe input signal gives the magnet coil controlling spring impels the pressure control valve by this (service brake) pressure F1. Valves output P2 and driving influence F1 is becomes the proportion under the steady state, achieves the steady state through negative feedback P2 and the pressure F1 inverse proportion relations. One with the negative feedback connections accumulat