张紧轮基础知识入门学习

1、张紧轮基础知识（入门学习）标准化文件发布号：（9556EUATWKMWUBWUNNINNULDDQTYKII张紧轮入门知识1.张紧轮的组成摩擦单元、扭簧、轴承、皮带轮及一些构件。2 张紧轮的若干结构型式9图311同步齿形带张紧机构压缩弹簧倾紧式枢轴板张紧器（Volvo汽牟）（b）张紧弹簧预紧式枢轴板张紧湍（Toyota汽午）（c）扭簧侦紧式枢轴板张紧器（Ford汽车（d）偏心轴套调整式张紧器（VW汽车）1 一枢轴板2压缩弹簧3导向销4一反力柱5 枢轴6张紧轮7锁紧螺母8-同步齿形带9一扭簧10反力柱销11-偏心轴套12固紧螺柱和锁紧螺母13滚珠轴承内外座圈14 一张紧弹簧15狭长的调整孔b)图

2、3-12同步齿形带张紧机构a）压缩弹簧滑板式张紧器（Ford汽车）b）凸轮滑板式张紧器（Peugeot汽车）1 一张紧轮轴承2轴承 支柱3滑动板4张紧轮5同步齿形带6一预紧的压缩弹簧7一方头凸轮心轴8凸轮9、13锁7紧螺母10_凸轮反力片11弹簧座12狭长调整孔Hydraulic lensionersDual Ifensioner SystemTight Side TensionerIntegrated Tensioner/Bracket Assemblies and Modules3.张紧轮的作用及安装(1)増大主动轮和从动轮之间的包角，増大三角带与带轮的接触面积，获得最大摩擦力，改善皮带的

3、使用条件，同时使传动平稳；(2)张紧轮均要装在松边，紧边的皮带会打滑，松边则不会打滑，减小动弧角度,増大静弧角度。4.张紧轮的性能测试应用凸轮驱动：& =比+%sin(2劝) :幅值f :驱动频率tensioner mounting plate8base platestiffening braceFigure 1. Arrangement of test fadlityTHf 'i1I L j /7wM» 1 1 1 111o experimental point fitted curve0.050.10.150.20.25030.350.4time (s)一二二二二

4、二扌二三-1O o o o o o o o8 6 4 2 0 8 6/1V/X/V/J/、ZX11119991111i0.050.10.150.20.250.30.350.4time (s)098765432 4 3 3 3 3 3 3 3 3 3406 . < 4to <»VAaFo o>0313233343536373839angular displacement (degree)o o8 61i 1A40200080609Figure 6. Tensioner #4 Cam 1 Test 1 300 rpm T = 119.8 F性能测试:Normal dur

5、ability test:Amplitude: +/ 2.5 degFrequency: 33HzTemperature: room temperatureDuration: 300hHysreresisnewHysreresisAfter test疲劳测试:Long time durability test:Amplitude: +/ 2mmFrequency: 33HzTemperature: room temperatureDuration: 850hnewAfter test11iWMirM* ir crwjr fc：- n*x ff 14 ft*、IL.KJ*foHrkuiGen.M

6、MM to M5. SAE的测试内容Variation:尸 Freque ncy> Oscillaiion Ambient temperature> LoadAnalysis; Wear over life time Torque over life time Damping over life timeComponent durability rig testingCompone nts才 Spring> Pulley> Bearing> Damping systemp Spring case13Resistance to environmental media

7、;p Hydraulic Oil> Water Cleaner Fuel> Oil< Salt SprayResult: Resistance to corrosion Funbon and characteristics of tensionw maintainedEncapsulated bearing and damping system is less susceptible to environmental agentsContamination TextCorrosion TestHot/Cold Cycling TestCold Box TestHot Box TestLife lug Test6.计算分