ESSOM COMPANY LIMITED Appendix
23
APPENDIX 2: Mechanical Brake Dynamometer
MECHANICAL BRAKE DYNAMOMETER
A dynamometer is equipment for measurement of output power of a prime mover such as water, steam, hot gas or
wind turbine or other engine
.
The torque measuring unit may be electric, water or mechanical brake
.
The mechanical brake is the most simple and less
expensive and is widely used for measurement of torque for small prime mover
.
The device uses friction of a belt or a
rope to generate torque
.
Various types of mechanical brake used for small equipment are as per below
:
1
.
Two Coil Springs
Load adjustment knob
Friction belt
Spring balances
Prime mover
(e.g.turbine)
Pulley
r
F
1
F
2
Load adjustment
Brake drum
Belt
Spring balance
Torque
= (
F
1
-
F
2
)
r
Figure 1
:
Two coil spring Brake
Figure 2
:
Diagram
2
.
A Coil Springs and Calibrated Weights
Brake drum
Spring balance
Load adjustment
(Calibrated
weights)
Rope
r
F
W
Calibrated weight
for load adjustment
Brake drum
Belt or rope
Spring balance
Torque
= (
F
-
W
)
r
Figure 3
:
Coil Spring and Calibrated Weights
Figure 4
:
Diagram
