Passenger: The 300L fuel tank needs to be lowered from 90 degrees to 45 degrees. ISO VGA 46 oil is used for crushing machinery. Is it possible to lower it in 30 minutes? ？ Which hydraulic air cooler is used
? Ambient temperature: 25 ~ 35 ℃
If the ambient temperature is selected according to the summer temperature of 35 ℃. Then, it is very normal for the working oil temperature of the crusher hydraulic oil to be below 60 ° C. The hydraulic oil temperature is not as low as possible. This is a common misconception. The oil temperature is low, and the working efficiency of the liquid system is also affected. The most suitable range is 40 ~ 55 ℃.
This is a very typical working example of air cooler for construction machinery. It is best to calculate the oil temperature at 50 ℃.
Yes, 50 ° C is ideal.
The fuel in the fuel tank will not be full, calculated as 280L.
Then, the heating power Pv = 0.85 × 280 × 2.15 × (90-50) /30×60=11.37KW
Temperature difference △ T = 50-35 = 15 ℃
Equivalent cooling power = 11.37 ÷ 15 = 0.76Kw / ℃
Add 10% safety margin 0.76 × 1.1 = 0.84Kw / ℃
When the oil return flow is below 150L / min, HD2095 is the most suitable, and the temperature can be controlled below 50 ° C.