nt coupling halve sizes can be combined with each B4-CH-17B Bevel-helical gear boxes B4

Flender/Flender Gear Units/Bevel-helical gear boxes B4

the transmission ratio into account, the total transmission error can then be determinedfor the mechanical model. The load-free transmission error, as function of therotation angle and of the vertical, horizontal and axial position of the pinion inrelation to the wheel, is subtracted from the total transmission error, yielding the load-dependent transmission error. The tooth pair stiffness and the related tooth force is then analysed as function of the current roll position, the load-dependenttransmission error and the displacement of the pinion in relation to the wheel. 5.4.3 Test Rig for Rear Axle Gears Acoustic measurements of gearboxes are usually performed in specialized noisetest rigs. In many cases, these test rigs have special acoustic properties, allowingstructure-borne noise as well as air-borne noise to be measured. The goal in the acoustic measurement of gearboxes is to analyse noise behavior objectively. Measurements of air-borne and structure-borne noise serve to determine the initial state, clarify the causes of noise, plan noise reduction measures and demonstrate the improvements achieved wide variety of methods and instruments are available to measure gear noise. These range from simple manual sound level meters to processor-controlled mea-suring stations. In general purpose gear test rig, it is possible to perform tests on both the load capacity and the acoustics of gear assemblies. An acoustic measuring room sur-rounding the specimen is used for air-borne noise measurements [ BREC0b ]. Apart from the classic acoustic measurements of air-borne and structure-borne noise, measuring systems for such variables as transmission error and angularacceleration are employed. Such measuring systems can be used for both input toand output from gear assemblies. The test array can additionally be subjected to excitation from drive and braking motors. Elements with low stiffness and large damping effect therefore need to beinterposed between the power out