Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
|
Power transmitted |
A. P = 2πTN , kW B. P = 2πTN /33,000 , HP |
|
|
Formula for Total force transmitted |
F = T/r = T / Dc/2 |
|
|
Formula for force transmitted per bolt |
Fb = F/n Where: n= no. of belts Dc = bolt circle diameter |
|
|
Formula for shearing of bolts |
Ss = fb / (π/4)d² |
|
|
Formula for compressive stress on bolts and flange |
Sc = fb /td |
|
|
What is coupling? |
is a mechanical device which is used to connect length of shafts permanently. |
|
|
What is rigid? |
coupling that do not allow angular, or rotational flexibility and used with collinear shafts. |
|
|
What is flange coupling ? |
What type coupling which consist of two halves of flanges connected by each other by bolts. |
|
|
What is flexible couplings? |
coupling which allows angularity to take care of misalignment of the shafts. |
|
|
1. Flanged bolt coupling has ten (10) steel 25.4 mm diameter bolts evenly tighten around a 415 mm bolt circle. Determine the torque capacity of the connection if the allowable shearing stress in the bolt is 50 MN/m² |
52.6 kN.m |
|
|
(prob.2) A flange bolt coupling consist of eight 20 mm diameter steel bolts space evenly around a bolt circle 300 mm in diameter. If the coupling is subjected to a torque of 15.1 kN-m, determine the maximum shearing stress in the bolts? |
40.04 Mpa |
|
|
(prob.3) A flange coupling having 180 mm bolt circle and 19 mm thick uses 8 bolts, 16 mm diameter to connect two shafts. It is use to transmit 60 kW at 180 rpm. Determine the factor of safety in bearing if yield point in compression is 448 Mpa. |
30.8 |
|
|
(prob.4) A turbine is connected to a generator by means of flange coupling that has a bolt circle diameter of 500 mm. The generator output is 40 MW, 3600 rpm and 90% efficiency. If there are 16 bolts, determine the force acting on each bolt. |
29.47 kN |
|
|
(prob.5) A 75 mm diameter shaft is transmitting 300 kW at 600 rpm. A solid coupling has 6 bolt each 18 mm in diameter. Find the required bolt circle diameter if shearing stress in bolts is 27.5 Mpa. |
227.40 mm |
|
|
(prob.6) The total force of 125 kN is required of flange coupling that has 5 bolts has also shearing stress of 30 Mpa for bolt. Determine the required diameter of bolt. |
32.57 mm |
|
|
(prob.7) A flange coupling with bolt circle diameter of 250 mm uses 8 bolts, 25 mm diameter. The torque transmitted is 15 kN-m and compressive stress of bolt is 15 Mpa. Determine the required flange thickness. |
40 mm |
