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MLS_3—170型采煤机是我国对西德EDW—170L 型采煤机测绘的基础上研制的。它已成为我国目前中厚煤层的主要采煤机械。MLS_3—170型采煤机主要特点之一是牵引部采用了两套自动调速装置,即液压自动调速装置和电机恒功率自动调速装置。从而可使采煤机在安全可靠的前提下,充分发挥采煤机的最高效能。然而,目前国内在使用该机过程中,液压自动调速装置不起作用,本文试对其原因和改进作一些初步探讨。一、调速特性分析MLS_3—170型采煤机牵引部设液压自动调速装置的目的是:当牵引部本身负载(牵引阻力)变化时进行自动调节牵引速
MLS_3-170 Shearer is developed on the basis of the surveying and mapping of West Germany EDW-170L Shearer. It has become the main coal mining machinery of medium and thick coal seam in our country. One of the main features of the MLS_3-170 shearer is that the towing unit adopts two sets of automatic speed regulating devices, namely the hydraulic automatic speed regulating device and the motor constant power automatic speed regulating device. So that shearer can be safe and reliable in the premise, give full play to the highest performance shearer. However, the current domestic use of the aircraft in the process, the hydraulic automatic speed control device does not work, this paper tries to make some preliminary discussion of the reasons and improvements. First, the governor characteristics analysis MLS_3-170 Shearer hydraulic control unit is equipped with automatic speed device is intended to: When the traction part of the load (traction resistance) changes automatically when the traction speed