【摘要】：高速滑動(dòng)電接觸是一種動(dòng)態(tài)電接觸，，在高速電氣化鐵路系統(tǒng)、航空航天等領(lǐng)域有著廣泛的應(yīng)用。在動(dòng)態(tài)電接觸中，發(fā)生在接觸區(qū)域的機(jī)械電氣等物理現(xiàn)象極其復(fù)雜，接觸表面溫度作為描述滑動(dòng)電接觸狀態(tài)的重要參數(shù)之一，對(duì)電接觸性能及接觸元件的摩擦磨損等有很大的影響。本文以高速滑動(dòng)電接觸為研究對(duì)象，針對(duì)電接觸中的大電流、電磁場(chǎng)環(huán)境，重點(diǎn)研究了電接觸表面的溫度效應(yīng)及基于紅外輻射原理的瞬態(tài)高溫測(cè)量技術(shù)，并利用高速滑動(dòng)電接觸試驗(yàn)機(jī)進(jìn)行相關(guān)實(shí)驗(yàn)研究，根據(jù)實(shí)驗(yàn)結(jié)果，對(duì)接觸表面進(jìn)行熱分析。 本文針對(duì)高速滑動(dòng)電接觸中接觸面溫度效應(yīng)問(wèn)題，重點(diǎn)分析電流、摩擦及電弧對(duì)接觸區(qū)域的熱效應(yīng)，并建立相關(guān)的數(shù)學(xué)模型。在此模型的基礎(chǔ)上，對(duì)不同電流載荷下以及不同滑動(dòng)距離下的溫度信息進(jìn)行了模擬仿真。探討瞬態(tài)電流載荷對(duì)接觸面溫度效應(yīng)的影響。對(duì)高速滑動(dòng)過(guò)程中的電接觸元件的高溫狀態(tài)進(jìn)行了有限元仿真，給出了滑塊與滑軌接觸面的動(dòng)態(tài)溫度分布。在此基礎(chǔ)上，基于熱傳導(dǎo)原理，對(duì)滑軌和滑塊元件表面不同位置的溫度場(chǎng)進(jìn)行熱分析，找出了接觸面瞬態(tài)溫度對(duì)接觸元件的影響。 本文針對(duì)高速滑動(dòng)電接觸中的電磁場(chǎng)環(huán)境，設(shè)計(jì)基于紅外輻射原理的高溫測(cè)量系統(tǒng)實(shí)現(xiàn)非接觸測(cè)量，采用隔離轉(zhuǎn)換技術(shù)，設(shè)計(jì)高速采集單元，實(shí)現(xiàn)瞬態(tài)信號(hào)的采集，增強(qiáng)系統(tǒng)的抗干擾能力�？紤]高速滑動(dòng)電接觸中接觸面溫升可能的影響因素，制定相應(yīng)的實(shí)驗(yàn)方案，并在高速滑動(dòng)電接觸試驗(yàn)機(jī)上進(jìn)行電接觸實(shí)驗(yàn)研究。對(duì)不同實(shí)驗(yàn)條件下的溫度數(shù)據(jù)進(jìn)行深入分析，表征了滑動(dòng)電接觸區(qū)域在瞬態(tài)大電流載荷下的溫度特性。
[Abstract]:High speed sliding contact is a kind of dynamic electric contact, which is widely used in high-speed electrified railway system, aerospace and other fields. In dynamic electrical contact, the mechanical and electrical phenomena occurring in the contact area are very complicated, and the contact surface temperature is one of the important parameters to describe the sliding electrical contact state. It has great influence on electrical contact performance and friction and wear of contact elements. In this paper, the high speed sliding electric contact is taken as the research object. The temperature effect of the electric contact surface and the transient high temperature measurement technology based on the infrared radiation principle are mainly studied in view of the high current and electromagnetic field environment in the electrical contact. According to the experimental results, the thermal analysis of the contact surface is carried out by using the high speed sliding electric contact tester. In this paper, the thermal effects of current, friction and arc on the contact area in high speed sliding electric contact are analyzed, and the related mathematical models are established. On the basis of the model, the temperature information under different current load and sliding distance is simulated. The effect of transient current load on the temperature effect of contact surface is discussed. The high temperature state of electrical contact element during high speed sliding is simulated by finite element method, and the dynamic temperature distribution of the interface between slider and rail is given. On this basis, based on the heat conduction principle, the thermal analysis of the temperature field at different positions on the surface of the sliding rail and slider element is carried out, and the influence of the transient temperature of the contact surface on the contact element is found out. In this paper, a high temperature measurement system based on infrared radiation principle is designed to realize non-contact measurement in the electromagnetic field environment of high speed sliding electric contact. The high speed acquisition unit is designed by using isolation and conversion technology to realize the acquisition of transient signals. Enhance the anti-interference ability of the system. Considering the possible factors affecting the temperature rise of the contact surface in the high speed sliding electric contact, the corresponding experimental scheme is worked out, and the electrical contact experimental research is carried out on the high speed sliding electric contact tester. The temperature data under different experimental conditions are analyzed in depth to characterize the temperature characteristics of the sliding electric contact region under the transient high current load.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM501.3

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