Stresses in straight tooth bevel gear by vikas

8
STRESSES IN STRAIGHT TOOTH BEVEL GEAR

Transcript of Stresses in straight tooth bevel gear by vikas

Page 1: Stresses in straight tooth bevel gear by vikas

STRESSES IN STRAIGHT TOOTH BEVEL GEAR

Page 2: Stresses in straight tooth bevel gear by vikas

IntroductionGears: A gear  is a rotating machine part having cut teeth which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source.

Types of gears:1. Spur Gear                                                1.                        2.                              2. Helical Gear                                         1.                    2.                        3.3. Herringbone Gear4. Bevel Gear5. Worm Gear6. Rack and Pinion                                      4.                 5.                       6.7. Internal and External Gear8. Face Gear9. Sprcokets                                                                                                                                                    7.                       8.                            9.

Page 3: Stresses in straight tooth bevel gear by vikas

Bevel gearsSPIRAL BEVEL GEARS• A Spiral Bevel Gear are used to 

transmit power between shafts that are at a 90-degree orientation to each other.

• Since spiral bevel gears are not offset, less sliding occurs within gear teeth. This results in a low temperature operation with more efficient functionality than hypoid gear types.

• since there is a large amount of tooth surface this allows for greater interlocking during the rotation process.

Page 4: Stresses in straight tooth bevel gear by vikas

STRAIGHT BEVEL GEARS

Straight Bevel Gears have a straight tooth geometry, which if extended, would pass through the point of intersection of their axes. Teeth are produced from forged alloy steel for maximum strength and case hardened for increased durability.

Page 5: Stresses in straight tooth bevel gear by vikas

Stresses in straight bevel gear tooth BENDING STRESS :The equation for bevel gear bending stress is the same as for spur gears as shown below:σ = (Ft/bmJ)*Km*Kv*KoWhere,                     Ft =Tangential load in N                    m = module at the large end of the tooth in mm                    b = Face width in mm                    J = Geometry form factor based on virtual number of teeth                     Kv = Velocity factor                      Ko = Overload factor                                            Km= Mounting factor, depending on whether gears are straddle mounted

Page 6: Stresses in straight tooth bevel gear by vikas
Page 7: Stresses in straight tooth bevel gear by vikas
Page 8: Stresses in straight tooth bevel gear by vikas