Design Essentials of Hydraulic Tank

Design Essentials of Hydraulic Tank

Hydraulic pump station nominal capacity of the fuel tank series (JB / T7938-1995), see Table 1.
Table 1 tank capacity JB / T7938-1995 (L)

4 6.3 10 25 40 63 100 160
250 315 400 500 630 800 1000 1250
1600 2000 3150 4000 5000 6300

Fuel tank capacity and the flow of the system, the general capacity desirable maximum flow of 3 to 5 times. In addition, the size of the tank capacity can be designed from the perspective of heat dissipation iron punching machine. Calculate the system heat and heat, and then consider the cooler cooling, from the thermal equilibrium point of view to calculate the fuel tank capacity. No cooling device, the natural environment to calculate the capacity of the tank cooling method is as follows.

angle bending machine

1) system heat calculation In the hydraulic system, where the loss of the system are turned into heat dissipation. Each cycle, each case its efficiency is different, so the loss is also different. The power of a cycle heat calculation drill machine formula
Where H – the average heating power of one cycle (W);
T – a cycle time (s);
Ni – input power (i) for the i-th case;
Ηi – the efficiency of the i-th case;
Ti – duration of the i-th case (s).
2) heat calculation When ignoring other parts of the system heat, only consider the tank cooling, it is clear that the total heating power of the system H to consider all the heat from the tank. At this time the tank cooling area A formula
Where A – tank cooling area (m2);
H – the thermal power (W) required to cool the tank;
△ t – temperature (generally 55 ℃ to consider) and the ambient temperature temperature difference (℃);
K – heat dissipation factor. K = 8 ~ 9; X = 15 ~ 17.5 in good condition; K = 20 ~ 23 in forced cooling of the fan; K = 110 ~ 175 in forced water cooling.
3) Calculation of the tank capacity Let the length, width and height ratio of the fuel tank drilling stainless steel be α: b: c, then the length of the tank is αl, bl, cl (see Fig.1)
Where A – heat dissipation area (m2).
Hydraulic system operating temperature is generally expected to remain in the range of 30 ~ 50 ° C, the maximum not exceeding 65 ° C, the minimum not less than 15 ° C, if the hydraulic system by natural cooling can not make the oil temperature control within the above range , You must install the cooler; the other hand, if the ambient temperature is too low, can not make the pump start or normal operation, you must install the heater.

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