车辆制动装置VehicleBrakingDevice44课.pptx

车辆制动装置VehicleBrakingDevice任务六120型控制阀TASK6120TYPECONTROLVALVE主讲人李西安ZHENGZHOURAILWAYVOCATIONALTECHNICALCOLLEGESpeakerLiXi’an

120型控制阀的特点Thecharacteristicsof120typecontrolvalve一在紧急放风阀中设有先导阀结构。Apilotvalvestructureisprovidedintheemergencyventvalve.在120/120-1型空气控制阀的主阀中增设加速缓解阀，与增加的一个加速缓解风缸相配合，Anaccelerationreliefvalveisaddedtothemainvalveofthe120/120-1typeaircontrolvalve,whichiscombinedwithanadditionalaccelerationreliefaircylinder.120型空气控制阀仍采用二压力机构，直接作用方式，主控机构仍采用橡胶膜板和金属滑阀结构。120/120-1typeaircontrolvalvestilladoptstwopressuremechanismanddirectactionmode,andthemaincontrolmechanismstilladoptsrubberfilmplateandmetalslidevalvestructure.适应压力保持操纵。Adjusttopressuretomaintaincontrol.120/120-1型空气控制阀在主阀作用部的滑阀上设了一个φ0.2的眼泪孔（呼吸孔），使控制阀在常用制动以后的保压位时，沟通制动管和副风缸，这样可在长大下坡道上配合机车对制动管漏泄有自动补风（压力保持）功能。120/120-1typeaircontrolvalveisprovidedwithadiameter0.2tearhole(breathinghole)ontheslidevalveofthemainvalveactionpart,sothatthecontrolvalvecancommunicatethebraketubeandtheauxiliaryaircylinderwhenthepressureismaintainedafterthecommonbraking.Inthisway,thelocomotivecanuseabrakecontrolonthelongdownhillroadandthelocomotivehasanautomaticair(pressuremaintenance)functionforthebraketubeleakagewhenthebrakepressureismaintained.设置半自动缓解阀。Setthesemi-automaticreliefvalve.12345

120型控制阀构造120typecontrolvalvestructure二120阀由中间体Intermediate主阀Mainvalve半自动缓解阀（以下简称缓解阀）semi-automaticreliefvalve(hereinafterreferredtoasreliefvalve)紧急阀Emergencyvalve等四部分组成。The120valveiscomposedoffoursections:intermediate,mainvalve,semi-automaticreliefvalve(hereinafterreferredtoasreliefvalve)andemergencyvalve.

120型控制阀构造120typecontrolvalvestructure二还起到连通制动主管、副风缸、制动缸、加速缓解风缸与主阀和紧急阀的各个气路作用。Italsoplaystheroleofconnectingthebrakemain,auxiliaryaircylinder,brakecylinder,acceleratingandrelievingtheaircylinderandthemainvalve