DESIGN OF FLANGE COUPLING
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This document outlines the 7 step process for designing a rigid flange coupling to transmit power between two shafts. The steps include: 1) calculating the shaft diameter based on the torque to be transmitted, 2) selecting a coupling based on the shaft diameter, 3) checking the shear strength of the coupling bolts, 4) checking the bearing strength of the bolts, 5) drawing a sketch of the coupling with dimensions, 6) comparing the allowable and actual torques and increasing key dimensions if needed, and 7) drawing a final sketch if all strength requirements are satisfied.
![Step:
3
Based on the diameter of shaft calculated select the
coupling and Note down its dimensions.
Step:
4
CHECKING FOR SHEAR STRENGTH OF THE BOLT.
4.1) Calculate Ft- Refer P.7.106 use equation Ft=2Mt/D2
4.2) Calculate [Ft] use equation Ft
Use equation [Ft] = n x d2/4 x [] ; Where [] is
allowable shear stress of shaft material.
4.3) Compare Ft and [Ft]
For safer Design Ft [Ft] ; If Ft >[Ft] select Next
higher coupling and repeat the procedure from step
3 until Ft [Ft]](https://image.slidesharecdn.com/md-iippt-151212092154/85/DESIGN-OF-FLANGE-COUPLING-5-320.jpg)
![Step:
5
CHECKING FOR BEARING STRENGTH OF THE BOLT
5.1) Note down the value of (b)
5.2) Calculate (Ft) ; use the equation [Ft] = nd2 b [b]
5.3) Compare Ft & (Ft)
For safer design F (Ft)
If Ft> (Ft) select Next higher coupling and repeat
the Step 3 & Step 5 Ft [Ft]
Step:
6
Draw a neat sketch of the coupling with dimensions.
2. Compare the allowable torque (Mt) with the
actual torque Mt
For safer design Mt [Mt]
If Mt [Mt] then increase the width & thickness or
length of the key to Next higher standard values
and repeat from Step 10.1 until Mt [Mt]
Step:7 Draw a neat sketch of the coupling with dimensions.
If flange coupling satisfies all the strength
requirements, then it is selected for the
application.](https://image.slidesharecdn.com/md-iippt-151212092154/85/DESIGN-OF-FLANGE-COUPLING-6-320.jpg)
DESIGN OF FLANGE COUPLING
- 1. Department of Mechanical Engineering Session: 2015-16 Design of flange coupling Submitted by: Tushar.Pillai Roll no.55-BProf. S.S. Kumbhalkar
- 2. A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power.
- 3. Flange coupling. This type of coupling has pins and it works with coupling bolts. The rubber or leather bushes are used over the pins.
- 4. Steps of design Rigid flang coupling Step:1 Calculate the diameter torque to be transmitted –Mt- use the equation. Step: 2 Calculate the diameter of the shaft-d-use the equation (Assume di=0) Round off the shaft diameter to R20 series.
- 5. Step: 3 Based on the diameter of shaft calculated select the coupling and Note down its dimensions. Step: 4 CHECKING FOR SHEAR STRENGTH OF THE BOLT. 4.1) Calculate Ft- Refer P.7.106 use equation Ft=2Mt/D2 4.2) Calculate [Ft] use equation Ft Use equation [Ft] = n x d2/4 x [] ; Where [] is allowable shear stress of shaft material. 4.3) Compare Ft and [Ft] For safer Design Ft [Ft] ; If Ft >[Ft] select Next higher coupling and repeat the procedure from step 3 until Ft [Ft]
- 6. Step: 5 CHECKING FOR BEARING STRENGTH OF THE BOLT 5.1) Note down the value of (b) 5.2) Calculate (Ft) ; use the equation [Ft] = nd2 b [b] 5.3) Compare Ft & (Ft) For safer design F (Ft) If Ft> (Ft) select Next higher coupling and repeat the Step 3 & Step 5 Ft [Ft] Step: 6 Draw a neat sketch of the coupling with dimensions. 2. Compare the allowable torque (Mt) with the actual torque Mt For safer design Mt [Mt] If Mt [Mt] then increase the width & thickness or length of the key to Next higher standard values and repeat from Step 10.1 until Mt [Mt] Step:7 Draw a neat sketch of the coupling with dimensions. If flange coupling satisfies all the strength requirements, then it is selected for the application.