【摘要】：空間站是人類開發(fā)和利用空間資源的平臺,也是載人航天的重要里程碑。目前空間站阿爾法傳動機構(gòu)采用的是標準漸開線直齒傳動方式,存在負載低速運行狀態(tài)下結(jié)構(gòu)振動、能源系統(tǒng)總重量較重、傳動裝置磨損影響整機壽命、傳動鏈傳動元件抗沖擊和疲勞能力較弱、傳動鏈誤差自適應(yīng)能力較差等問題。因此,開展阿爾法機構(gòu)新型高性能傳動方案研究,對于提高整機傳動性能具有重要的理論意義和工程實用價值。漸開弧面齒輪傳動結(jié)合了漸開線齒輪傳動和圓弧齒輪傳動兩者的優(yōu)點,既具有漸開線齒輪的中心距可分性,還具有圓弧齒輪凸凹接觸強度高的優(yōu)點,其接觸過程為點接觸,近似于純滾動,具有良好的誤差適應(yīng)性。本文在漸開弧面齒輪傳動研究基礎(chǔ)上,針對阿爾法機構(gòu)實際運用需求提出一種新型內(nèi)嚙合漸開弧面齒輪傳動方案,重點開展誤差分析及試驗研究。本文的主要內(nèi)容包括:(1)介紹了空間站阿爾法傳動機構(gòu),分析了目前空間站阿爾法傳動機構(gòu)的缺陷,闡述了內(nèi)嚙合漸開弧面齒輪的推導(dǎo)過程,結(jié)合圖例說明了內(nèi)嚙合漸開弧面齒輪的成形原理,分析了內(nèi)嚙合漸開弧面齒輪的誤差補償能力和不發(fā)生根切的條件。(2)基于阿爾法傳動機構(gòu)的性能指標,設(shè)計了新型傳動方案,并對其中心距補償能力、側(cè)隙及齒面接觸應(yīng)力進行校核計算,結(jié)果均滿足要求。通過有限元進行仿真分析,得到分析結(jié)果與理論計算一致,均表明設(shè)計的新型傳動機構(gòu)達到所需的性能指標。(3)根據(jù)試驗的性能要求,對試驗臺整體結(jié)構(gòu)方案進行了設(shè)計,并對試驗臺關(guān)鍵部分進行了結(jié)構(gòu)分析,選取了試驗各裝置,使其滿足試驗臺性能滿足要求。(4)共進行了兩輪1:2縮比方案誤差補償能力驗證試驗以及疲勞壽命試驗,試驗表明新型傳動方案即漸開弧面齒輪具有中心距誤差補償能力,能夠達到壽命所需要求。
[Abstract]:Space station is a platform for the development and utilization of space resources and an important milestone for manned space flight. At present, the Alpha transmission mechanism of the space station adopts the standard involute straight tooth transmission mode. It has structural vibration under the condition of low speed running load, the total weight of the energy system is heavy, and the wear of the transmission device affects the whole machine's life. Transmission chain transmission components have weak impact and fatigue resistance and poor adaptive ability of transmission chain error. Therefore, it is of great theoretical significance and practical value to study the new high performance transmission scheme of the alpha mechanism for improving the transmission performance of the whole machine. The involute arc gear drive combines the advantages of involute gear transmission and circular arc gear transmission. It not only has the advantages of separating the center distance of involute gear, but also has the advantage of high contact strength between convex and concave of circular arc gear. The contact process of involute gear is point contact. It is similar to pure rolling and has good error adaptability. Based on the study of involute arc gear transmission, a new type of internal meshing involute arc gear transmission scheme is proposed in this paper, which focuses on error analysis and experimental study. The main contents of this paper are as follows: (1) the paper introduces the Alpha transmission mechanism of the space station, analyzes the defects of the Alpha transmission mechanism of the space station at present, and expounds the derivation process of the internal meshing involute arc gear. The forming principle of internal meshing involute arc gear is explained with legend. The error compensation ability of internal meshing involute arc gear and the condition of no root cutting are analyzed. (2) based on the performance index of alpha drive mechanism, A new transmission scheme is designed, and its compensation ability of center distance, clearance and contact stress of tooth surface are checked and calculated, and the results meet the requirements. The simulation results obtained by finite element method are in agreement with the theoretical calculation. The results show that the new transmission mechanism has achieved the required performance index. (3) according to the performance requirements of the test, the overall structure scheme of the test bed is designed. The structure of the key parts of the test bed is analyzed, and the test devices are selected to meet the requirements of the test bench performance. (4) two rounds of error compensation tests and fatigue life tests are carried out. The test results show that the new transmission scheme, I. e., the involute arc gear, has the ability to compensate for the center distance error, and can meet the requirement of service life.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：V476.1

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