Research On The Testing System Of The Light Automobile's Transmission Life-span

一.Introduction 20 centuries is the ages that car industry develops soon, the automobile'industry became many nations to pay the pillar industry gradually, for thesake of the control automobile product quality strictly, the quality of theexaltation automobile, as to it's certanly will always become and zeropartses put forward a higher and stricter request. The automobile gearbox isthe importance that the automobile spreads to move system to constitutepart, the good and bad of its function influences directly to spread function ofmove the system, relate to to the whole quality of car. Extend continuouslyalong with the automobile market, the request of the automobile professionto gearbox increases continuously, requesting to be high also and more andmore to the quality of the automobile gearbox, this will beg since have tohave the process of high technology means, and then have to have theexamination equipments of the high quality. As a result, develop theautomobile gearbox of a set of in general use economy energy type toexperiment set seem to be extremely and urgently with the importance. That topic is FAW CAR Co.,Ltd for the sake of the development anddemand of the orientation market, further exaltation long spring wheel gearfactory automobile become soon the product quality of the box, facing to amarket to grow the spring wheel gear factory invitation to bid for a the vaporcar incorporated company of horizontal development item.二,System constitue totally The whole system is three parts that they are machine to move part andlubricate the cooling system and calculator to control system.Among them,the machine spreads to move part include two wheel boxes,main testingmachine, accompanying testing machine, machine bring to bear load,sensorof torque and speed, transmission shaft and transducer motor so on.Owing to user's request, also for lowering a manufacturing cost, wedesigned by oneself a kind of internal force type machine add to load:Theturbine and worm system adds to load, The concrete principle is as follows:The loading gear box have two stalks inside the outside,inside and outsideshalks connect diffrently torque and worm. When the worm revolves certainangle, .The shalk of torque and worm come into being contrary moment .Asthe same time the moment of worm effect output part through active wheelcar ,passive wheel car,transmission shaft,gear-box,the moment of input andoutput is the same ,constrary way.chart 1 The system machine constitutes frame diagramDescend diagram is the control system to constitute principle frame diagramfor computerchart 2system of computer control diagramThe lubricant temperature adoption the outside of the shut type cools off acontrol method circularly. The whole suit place conclude circular oilpump,the tube type heat exchanger,water pump,the temperature spread thefeeling machine and fuel tank . Circulating the oil pump sample the engineoil of the lubricant road system to the tube type heat exchanger, thecalculator control device passes to import of the temperature spread the oiltemperature of the feeling machine diagraph oil road system, according tocollect to of the engine oil temperature value auto control was small tochange the transmission electrical engineering to turn to regulate watercurrent quantity soon and thus, making to cool off a water to pass tube typeto spread the hot machine and engine oil to carry on hot commutation,making thus the temperature that the engine oil temperature of the lubricantroad system nears to or attains enactment.The diagram is the system constitutes principle:Chart 3 lubracate cooling system三,Computer system control principlethe diagram is the computer system control principle:1)Temperature control of gear-box and wheel box: When the on trialtemperature of the testing is higher than the actual temperature of thesystem, apply procedure to collect the signal that the temperature spreadsthe feeling machine continuously, and convert the temperature value.Thetemperature value and the on trial temperature comparison of the enactmentwill measure physically, decide to cool off the start of the device through itsbad value, carry out thus accurate,attain the enactment temperature ofthework condition quickly.chart 4 computer control princplethe text adopted PID control and Fuzzy control to test andanalysis,Compare with two kinds of way,we decided to adopt temperaturefuzzy control.the result of testing express that precision and reliability offuzzy contron can satisfy the require of testing in the meantime.2)mesure and display of lubricate oil temperature: The system procedurecollects the signal that the temperature of the lubricant spreads the feelingmachine, and show its temperature, in the meantime when control thetemperature not agree with to match on trial temperature to request,the oiltemperature undulated big hour can report to alarm.3)Transmission control: The system procedure passes to collect to turn soonsignal of spread the feeling machine, change the transmission through acontrol thus to controling the speed of the electrical engineering to combineand can show the speed value in the meantime, in addition, being to turn toundulate soon can report to the police and shut down automatically greatly.4)Messure and display of testing machine's speed and torque: The systemspeedInsustrycomputerSensor of speed and CB2000catorquevibrate Accelaration ShiftA/Dcardpressur Pressure sensor ShiftI/OVibrate alarmPressure alarmGear-box Tem ShiftWheel box Tem ShiftTemperatureTemperatureprocedure collects the singal of speed and torque sensor, and in theinterface of the applied procedure namely.The value that hour measurewhen display.While turning soon or twisting the scope or safe scope thatspeed and torque set exceed, the procedure can judge automatically andreport to alarm.5)Inspect of gear-box vibration: In the gear-box life span experiment, Thegear-box is placed in over a long period of time under high burden circulate,Break the dentition is to usually take place. Special at new productdevelopment the process appear more multifarious ,we add the gear-boxbody up set out three vibration accelerations sensors, chase themrespectively set out in the I stalk,II stalk and the in the center axial bearingsabove. Because the vibration of the wheel gear will spread to bearingsthrough stalk, the bearings spreads to again the gearbox a body up, so thevibration acceleration sensor can pick up useful signal.Pass the vibrationsignal monitor gearbox wheel gear circumstance, if appear a problem tothen adopt to correspond measure.四,Experiment result and analysisOriginally experiment data analysis adoption in fixed time bobtailexperiment method.The gear-box life span that experiments the equipmentsas this development experiments system, experimenting sample for produceflowing water on-line sample random of qualified article;Experiment the oiltemperature as 85 ±2oC;walk to match to divide circularly 10 times to carryon;Then adopt gear to circulate an on trial method to carry on the wholeburden operation to experiment, each gearbox again carry on 10 experimentcirculation, each time on starting in from the low file circularly, gradually toupscale conversion, went forward file to complete 10 experiment circulationafter, pour file to revolve for two hours.Check the damage circumstance of the gearbox after completing the totalcirculation number of times of the above-mentioned provision, and havealready corresponded a record in the applied procedure, Be design andinvestigate the product quality of importance basis.Also can make 23analysis for distribute that the gearbox life span distribute, can draw agearbox life span to distribute curve.Make one quantitative analysis to thelife span of the gearbox from another angle.