Worm Gear: Merits and demeritsterminology. Thermal capacity, materials-forces and stresses, efficiency, estimating the size of the worm gear pair. Cross helical: Terminology-helix angles-Estimating the size of the pair of cross helical gears.
Geometric progression — Standard step ratio — Ray diagram, kinematics layout -Design of sliding mesh gear box — Design of multi speed gear box for machine tool applications — Constant mesh gear box — Speed reducer unit. Cam Design: Types-pressure angle and under cutting base circle determination-forces and surface stresses. Design of pulleys and sprockets. Estimating the size of the helical gears. Estimating the dimensions of pair of straight bevel gears.
Cross helical: Terminology-helix angles-Estimating the size of the pair of cross helical gears. Geometric progression — Standard step ratio — Ray diagram, kinematics layout -Design of sliding mesh gear box — Design of multi speed gear box for machine tool applications — Constant mesh gear box — Speed reducer unit.
Cam Design: Types-pressure angle and under cutting base circle determination-forces and surface stresses. Design of plate clutches —axial clutches-cone clutches-internal expanding rim clutches- Electromagnetic clutches. Band and Block brakes — external shoe brakes — Internal expanding shoe brake. Question Papers. Question Banks. Thank you for visiting my thread. Hope this post is helpful to you. Have a great day! Kindly share this post with your friends to make this exclusive release more useful.
Notify me of follow-up comments by email. Notify me of new posts by email. Welcome to EasyEngineering, One of the trusted educational blog. Check your Email after Joining and Confirm your mail id to get updates alerts. Mech Mechanical 6th Semester. Translate PDF. Name the four types of belts used for transmission of power. What is wiping? How it can be avoided in belt drive? What are the materials used for V grooved pulleys?
When do you prefer a wire rope drive? Write any four wire rope applications. How are wire ropes designated? List out the various stresses induced in the wire ropes. While designing a wire rope drive, always, a larger sleeve diameter is preferred justify the statement?
Give any three applications of chain drives? What is backsliding in chain drives? Marks Questions Part B Questions The motor runs at rpm and the compressor is to run at rpm. Belt specifications2.
If the mass of1m3 of leather is 1mg and the stress in the belt is not to exceed 2. It is required to select a flat belt drive for a fan running at rpm. The belt drive is open type and space available for a center distance of 2m approximately. The diameter of a driven pulley is mm. Design a belt drive to transmit20kw at rpm aluminium rolling machine, the speed ratio being 3. The distance between the pulley is3m. The driving sprocket runs at rpm and driven sprocket at rpm with center distance of approximately mm.
Select the roller chain. The weight of the hook etc. Calculate the diameter of the wire rope. The rope diameter may be taken as 30 times the diameter of the rope.
The cross-sectional area of the wire rope may be taken as 0. The minimum centre distance is mm. The chain tension may be adjusted by shifting the motor 16 17 Design a chain drive to actuate a compressor from a 12 kW electric motor at rpm, the compressor begins rpm. Minimum centre distance should be mm, the chain tension may be adjusted by shifting the motor on rails.
The centrifugal pump is located at mm form the motor. Design a chain drive. Design the rope drive. Define module? What are the advantages of toothed gears over the types of transmission system? In a pair of spur gears, the module is 6mm. Determine the circular pitch and the diametral pitch? What are the standard interchangeable tooth profiles?
Why is pinion made harder than gear? What are the main types of gear tooth failure? What are the assumptions made in deriving lewis equation? When do you use non-metallic gears? Define pitch circle with reference to spur gears?
What are the common forms of fear tooth profile? How can you over come that difficulty? State its application. Powered By www. With a speed reduction ratio 2. If the pinion has 24 teeth, determine the necessary module for full depths the teeth. Assume 15Ni 2Cr 1 Mo 15 material for both pinion and wheel. Design a spur gear drive required to transmit 45 Kw at pinion speed of rpm.
The velocity ratio 3. The teeth are 20 full depths involute with 18 teeth on the pinion.
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