Bevel-helical gear reducer B4 ear units vertical mounting position Types B B an B4-SV28-B

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

sus frequency and pinion speed. Resonant frequencies are represented as vertical lines; the ascending lines indicate excitation by the gear and the electric motors. These frequencies rise in proportion with the increase in rotation speed from 3 minto 5,0 min. The Campbell diagrams for gear set are characterized by excitations from the drive motor and the bevel gear stage, along with their harmonics. Predominant for gear set , on the other hand, is the vibrational excitation of the gear. The Campbell diagrams demonstrate clearly that assessment of acoustic behavior on the basis of structure-borne and air-borne noise makes sense only at higher speeds. The meshing frequency harmonics are, likewise, strongly marked at higher speeds. By comparison, the spectra at the constant operating points, as shown in Fig. 5.3, exhibit virtually no harmonics of the meshing frequency. Fig. 5.3 Speed run-up: structure-borne noise at the output bearing with torque load of 5 Nm5.4 Dynamic Noise Excitation 2 comparison of the Campbell diagrams for gear sets and shows that gear set produces higher noise emission. Air-borne and structure-borne noise are not analysed at individual operating points, but necessarily over the entire operating range. However, it is sufcient to examine the excitation behavior by means of the transmission error at small number of static operating points. References [BAGH7] Bagh, .: ber die Zahnfutragfa higkeit spiralverzahnter Kegelra der. Dissertation, RWTH Aachen ( [BECK9] Becker, .: Analyse und Optimierung des Lauf- und Gera uschverhaltens bogenverzahnter Kegelra der. Dissertation, RWTH Aachen ( [BOSC6] Bosch, .: ber das dynamische Verhalten von Stirnrad-getrieben unter besonderer Berucksichtigung der Verzahnungsgenauigkeit. Dissertation, RWTH Aachen ( [BREC0a] Brecher, ., Gacka, .: Simulationsmodell zur Abbildung des dynamischen Verhaltens von Kegelradgetrieben Beru cksichtigung weiterer Anregungsme- chanismen. Tagungsband zur 4. Arbeitst