Consider the helical gear supported by bearing A and B shown in the figure below. (length...

 

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Consider the helical gear supported by bearing A and B shown in the figure below. (length is in mm units) The motor shaft is rotating at constant speed of 1500rpm. driven shaft is rotating at constant speed of 666.67 rpm power: 5.5kW Z1= 20, Z2=45 pressure angle: 20 normal module : 2 twist angle: 25 degree gear forces at the center. tangential force : 1586.5N total radial force 1709.66N axial force: 739.8 N : Bearing A takes only radial loads, Bearing B takes both thrust and radial loads. investigate which bearing is more critical and then you're going to install the identical bearings on both A, B. (* Think about the reaction forces on each bearings.) Use this formula: XVFr+ YFa (dynamic equivalent load) apply X-0.56, V=1, Y-1.55 I think Fr should be total radial load/2, and Fa should be Fa/2 or just Fa (I am not sure which is desirable) goal bearing life hours: more than 90,000 hrs select the best bearing number(select the least value.) a. bearing number: 6304 (dynamic load capacity: 13kN b. bearing number: 6305 (dynamic load capacity: 17kN) c. bearing number: 6306 (dynamic load capacity: 22kN) d. bearing number: 6307 (dynamic load capacity : 26kN) e. bearing number: 6308 (dynamic load capacity : 32kN) your answer: option_ Motor A ☐ 500 1000 Z₁ Z₂ B Consider the helical gear supported by bearing A and B shown in the figure below. (length is in mm units) The motor shaft is rotating at constant speed of 1500rpm. driven shaft is rotating at constant speed of 666.67 rpm power: 5.5kW Z1= 20, Z2=45 pressure angle: 20 normal module : 2 twist angle: 25 degree gear forces at the center. tangential force : 1586.5N total radial force 1709.66N axial force: 739.8 N : Bearing A takes only radial loads, Bearing B takes both thrust and radial loads. investigate which bearing is more critical and then you're going to install the identical bearings on both A, B. (* Think about the reaction forces on each bearings.) Use this formula: XVFr+ YFa (dynamic equivalent load) apply X-0.56, V=1, Y-1.55 I think Fr should be total radial load/2, and Fa should be Fa/2 or just Fa (I am not sure which is desirable) goal bearing life hours: more than 90,000 hrs select the best bearing number(select the least value.) a. bearing number: 6304 (dynamic load capacity: 13kN b. bearing number: 6305 (dynamic load capacity: 17kN) c. bearing number: 6306 (dynamic load capacity: 22kN) d. bearing number: 6307 (dynamic load capacity : 26kN) e. bearing number: 6308 (dynamic load capacity : 32kN) your answer: option_ Motor A ☐ 500 1000 Z₁ Z₂ B

Answer rating: 100% (QA)

The provided text and figures outline a scenario involving a helical gear mechanism supported by bearings A and B each subject to different loads The goal is to determine the best bearing for both loc... View the full answer