Research On Motivity Matching Of QUY100 Crawler Crane

As a new domain at home, the industry of crawler crane has experienced a great development in the passed 5 years. Not only an increase of 50 percent in the output, but also a span in the tonnage annually. Up to the year of 2010, the maximal tonnage of crawler crane has got to 2,000 tons at home, and the performance can compare beauty with the foreign products at the same level in tonnage. But the research on intelligentizing technology of energy saving is still at low level. As high-power engine should be matched for the crawler crane, also a great consumption in the energy, it is very necessary to research the Motivity matching.Based on QUY100 crawler crane, this study makes a research on scientific theory and experiment for engine-flameout when traveling after the substitution for Rexroth constant-power and variable-pump system using Linder load-sensing system. Using the tool of AMESim, software for hydraulic simulation and data collection, the study gives a comprehensive analysis of two kinds of power system and also a systemic test and evaluation. By analyzing, we know that the power we needed has exceeded the capability of the engine when running at low speed in Linder load-sensing system and then the engine is falling short of energy. After finding the reason for the engine-flameout, we give a series of means to solve the problem, including reducing the pressure of the flowing-control valve of the LS pump, restricting the displacement of the control valve, importing the speed signal of the engine and changing the characteristic of the feedback, and a simple validation for the improvement scheme. And applying the research conclusion on reasonable matching for the pump and engine, we get an expectable effect in efficient working and energy-saving, as what we want.The energy saving method in the thesis is efficient, and provides asolid infrastructure for the design of following produets.