Click here to sign up. Download Free PDF. A short summary of this paper. Download Download PDF. Translate PDF. Gears are mainly typed like spur gears, helical gears, double helical gears, bevel gears, crown gears, hypoid gears, worm gears, rack and pinion, epi cyclic gears etc. This paper presents the stress analysis of mating teeth of spur gear to find maximum contact stress in the gear teeth.
The spur gears are designed in the Creo Parametric and the. The results show that the maximum contact stresses and induced bending stresses obtained from Finite Element Analysis are very less and well under the safe limit. The deformation patterns of 15NiCr1Mo15 and SCM gears depict that the difference in their deformation is negligible.
International Journal of Mechanical Engineering and Technology, 7 6 , , pp. The reduction in weight has many advantages like better stability, increased fuel economy, better aesthetics and automobile field is no different than another field in this scenario.
The reduction in the weight of vehicle not only results in saving energy, minimising brake and tyre wear but also in cutting down the emissions which are perhaps the most welcomed aspect of weight reduction.
This reduction in the weight can be achieved by eliminating the differential from the rear wheel drive vehicle. The differential is a mechanical device whose core purpose is to provide constant torque to both the half shafts and different angular velocities to the same during turning. But a vehicle can run without differential also if high acceleration during straight course or turns and reduction in weight of the vehicle is kept at priority during designing.
As spur gears are the simplest type of gears in which the teeth are cut parallel to the axis of the shaft on which the gear is mounted. Furthermore, the differential in the gearbox assembly is replaced by the automatic locker or spool which is used to connect the crown gear to the half shafts. The final drive gear assembly provides the final stage of gear reduction in order to decrease the RPM and increase the rotational torque and thus, the wheels never spin as fast as the engine in almost all applications even when the transmission is in overdrive gear.
The final drive assembly is connected to the differential. In front-wheel drive applications, the differential assembly and final drive are located inside the transmission or transaxle case. In a typical rear-wheel drive application, the engine and transmission are mounted in the front and the final drive and differential assembly sit in the rear of the vehicle and rotational torque from the transmission is received through a drive shaft.
To learn more, view our Privacy Policy. To browse Academia. Log in with Facebook Log in with Google. Remember me on this computer. Enter the email address you signed up with and we'll email you a reset link. Need an account? Click here to sign up. Download Free PDF. Abhilash L Khedkar. A short summary of this paper. Spur gear is most basic gear used to transmit power between parallel shafts. Spur gear generally fails by bending failure or contact failure.
This paper analyses the bending stresses characteristics of an involute spur gear tooth under static loading conditions. The stresses at the tooth root are evaluated analytically using existing theoretical models. The theoretical and FEM results are compared. The results obtained theoretically are in good agreement with those obtained from software.
Also an attempt is made to introduce Stress and displacement characteristics of tooth under dynamic loading conditions.
International Journal of Mechanical Engineering and Technology, 7 5 , , pp. Because of the high degree of reliability and compactness gears dominates the field of mechanical power transmission. Gearbox is used to convert the input provided by a prime mover into an output required by end application. Due to increasing demand for quiet and long-term power transmission in machines, vehicles, elevators and generators, people are looking for a more precise analysis method of the gear systems.
It requires the better analysis methods for designing highly loaded spur gears for power transmission systems that are both strong and quiet. Due to development of computers people are using numerical approach for the analysis purpose as it can give more accurate analysis results.
The finite element method is capable of providing information on contact and bending stresses in gears, along with transmission errors, which can be done easily in ANSYS software. Gear analysis in the past was done by using analytical methods which requires complicated calculations.
Now with the use of FEA we can calculate the bending stresses in the gear tooth for given loading condition and we can compare the FEA results with existing models to decide the accuracy.
Also static as well as dynamic, both loading conditions of gear can be easily analyzed in Ansys which is not the case with Analytical method. Any problem can be solved by following same procedure. Question The Following data is given for a spur gear pair made of steel and transmitting 5KW power from an electric motor running at rpm to a machine: No. Hence it is necessary to design the gear for bending. Even today, the Lewis equation is considered as the basic equation in the design of gears [1].
This parabola shown by dotted line is a beam of uniform strength. In the current analysis of spur gear we follow the Lewis assumptions and equation. So we directly find the deflection of the parabolic teeth with minor errors with actual deflection [2, 3]. The theory applies to both linear and rotational deflections. Analytical Results 3.
Using basic values for various parameters. Analysis by using Ansys 3. Ansys Procedure The entire analysis is done on the single gear tooth in Ansys
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