Brake Wheels for Hydraulic Brakes
Wheel
Diameter
in.
|
Weight
(approx.)
lbs.
|
Maximum
Speed
R.P.M.
|
Energy
Dissipation
(ft. lb./hr)*
|
6
8
10
14
18
|
18
22
48
115
227
|
4800
4500
3300
2500
1900
|
1,000,000
1,200,000
2,500,000
5,000,000
9,000,000
|
|
* Energy Dissipation: Brake energy ratings are
normally given in foot pounds per hour (ft. lb./hr) for
repetitive braking. The above energy dissipation figures
are maximums based on reasonably even spaced stops with
free air flow for cooling around the outer surface of the
brake wheel. These figures assume an ambient temperature
of approximately 68 degrees F (20 degrees C).
Energy dissipation (kinetic energy) on overhead crane
applications can be calculated as follows:
|
|
Brake Wheels for Electric Brakes
Wheel
Diameter
in.
|
Weight
(approx.)
lbs.
|
Maximum
Speed
R.P.M.
|
Energy
Dissipation
(ft. lb./hr)*
|
4.5
5.5
7.0
8.0
10
13
16
19
23
30
|
20
25
25
28
35
90
145
215
310
940
|
5800
5500
5000
4200
3300
2900
2400
1900
1600
1100
|
500,000
730,000
1,000,000
1,250,000
2,200,000
4,200,000
6,100,000
9,400,000
14,600,000
21,000,000
|
Where:
|
KE
N
232
WE
WL
VE
VL
|
=
=
=
=
=
=
=
|
Kinetic Energy (Ft. Lb./Hr.)
Number of stops per hour
Constant
Empty crane weight (tons)
Loaded crane weight (tons)
Empty crane speed (Ft./Min.)
Loaded crane speed (Ft./Min.)
|
|
