Winches for Industrial appliance - haacon - #19

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Text version of the page
75
150
225
300
Power
Power is the ability to deli­ver a certain performance in a certain time.
Speed (V) and load (F) combined, can be ex­pressed in power (P in kW) by a mathematical formula:
P = (V x F) : 6120 PinkW, Vinmeters/min., F in kg (1 kg ~ 10 Newton), 6120 is constant.
The theoretical value can easily be calculated, but in practice we need to install sufficient power to over­come efficiency losses. Cable on sheaves, cable on drum, gearbox, motor electric or hydraulic and the supply lines all create losses.
To overcome these losses we need to install extra power. In the power chart we already accounted for an average loss,
so the power you find in the graph is roughly the instal­led power.
40
420
35
30
360
25
300
20
240
15
180
10
120
5
60
line pull
Tonne
0
5
10
15
20
25
30
35
40
PLANETARY WINCH
Example:
27 tonne pull at 16 m/min speed give 90 kW 90 kW at 186 bar give min. 300 l/min
Air winches
Air pressure 7 bar
Air consumsion 21 l/s per kW
Planetary winch total efficiency 80% Example:
Load (F) 27 Ton, speed (V) 16 meter/min, give 88 kW by calculation. Installed electric motor will be 90 kW
Hydraulic required, with available 300 liter/min, a pressure of 190 bar is needed. Or; When we only have 150 liter/min. available oil flow, we need to go to a pressure over 360 Bar. Please check the available pressure and flow in hydraulic applications and make sure it suits the power chart's requirements.

pageCatalog pdf di En 2012-05-22-30