【摘要】：作為超深礦井提升的關鍵設備之一,纏繞式提升機依靠鋼絲繩在滾筒上卷繞來保證其安全可靠運行,鋼絲繩在滾筒上多層纏繞過程中層間接觸摩擦副的摩擦特性直接影響其服役壽命。本課題在國家重點基礎研究發(fā)展規(guī)劃項目的資助下,開展了纏繞提升鋼絲繩沖擊摩擦特性研究,旨在能夠掌握纏繞提升鋼絲繩層間摩擦特性及損傷機理,為超深礦井纏繞提升機纏繞層數(shù)設計和保障纏繞提升鋼絲繩安全運行提供基礎數(shù)據(jù)。首先,理論分析了提升鋼絲繩在滾筒上卷繞運動,掌握了鋼絲繩多層卷繞排列形式、導向規(guī)律及鋼絲繩間受力特征,得到了鋼絲繩繞入沖擊問題產生的原因。其次,針對纏繞提升鋼絲繩層間沖擊摩擦工況,研發(fā)了纏繞提升鋼絲繩沖擊摩擦試驗臺,先開展了鋼絲繩無沖擊摩擦試驗,分析了干摩擦和油水混合介質潤滑狀態(tài)下鋼絲繩摩擦因數(shù)、摩擦溫升以及表面磨損形貌隨載荷、相對滑移速度的變化規(guī)律,隨后進行了層間鋼絲繩沖擊摩擦試驗,對比分析了干摩擦和潤滑狀態(tài)下沖擊摩擦因數(shù)和表面磨損形貌隨沖擊載荷、沖擊速度和滑移速度的變化規(guī)律;結合鋼絲繩接觸區(qū)域表面磨損形貌,掌握了鋼絲繩沖擊摩擦損傷機理。最后,結合滾筒上纏繞提升鋼絲繩間接觸受力狀態(tài)和材料屬性,建立鋼絲繩靜力拉伸有限元模型,進行鋼絲繩靜力拉伸有限元仿真,掌握了鋼絲繩應力應變分布規(guī)律;建立層間鋼絲繩沖擊有限元模型,對鋼絲繩間沖擊行為進行仿真,掌握了繩間沖擊過程中鋼絲繩等效應力和能量變化規(guī)律以及塑性應變情況;建立鋼絲繩相對滑動有限元模型,對層間鋼絲繩三維螺旋接觸行為進行熱-應力有限元仿真,掌握了鋼絲繩滑動過程摩擦表面溫升和等效應力變化規(guī)律;將試驗結果與仿真結果進行對比分析,驗證了有限元模型的合理性。
[Abstract]:As one of the key equipment of the ultra-deep mine hoist, the winding hoist relies on the wire rope to coil on the drum to ensure its safe and reliable operation. The friction characteristics of wire rope in multi-layer winding process directly affect its service life. With the aid of the national key basic research and development program, the research on the impact friction characteristics of winding hoisting rope is carried out in order to master the friction characteristics and damage mechanism of winding hoist rope layer. It provides the basic data for the design of winding layer number of super deep mine winding hoist and the safe operation of winding hoist wire rope. Firstly, the winding motion of hoisting wire rope on the drum is analyzed theoretically, and the multi-layer winding arrangement, the guiding law and the force characteristics between the wire ropes are mastered, and the causes of the impact problem of the wire rope winding are obtained. Secondly, according to the interlayer impact friction condition of winding hoist rope, the impact friction test rig of winding hoist rope is developed, and the non-impact friction test of wire rope is carried out first. Under the condition of dry friction and oil-water mixed medium lubrication, the friction coefficient, friction temperature rise and surface wear morphology of steel wire rope with load and relative slip velocity are analyzed, and then the impact friction test of interlaminar wire rope is carried out. The changes of impact friction coefficient and surface wear morphology with impact load, impact velocity and slip velocity under dry friction and lubrication were compared and analyzed. The mechanism of impact friction damage of wire rope is mastered. Finally, the finite element model of wire rope static tension is established, and the stress and strain distribution law of wire rope is grasped by finite element simulation of wire rope static tension, combined with the contact force state and material property of hoisting rope on roller. The finite element model of interlayer wire rope impact is established, and the impact behavior of wire rope is simulated. The law of equivalent stress, energy change and plastic strain of wire rope during the process of interlayer impact are grasped, and the relative sliding finite element model of wire rope is established. The three-dimensional spiral contact behavior of interlayer wire rope was simulated by thermo-stress finite element method, and the law of temperature rise and equivalent stress of friction surface during the sliding process of wire rope was mastered, and the results of test and simulation were compared and analyzed. The rationality of the finite element model is verified.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD532

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本文編號：2276171