Hydraulic Tank Design, Task & Type.

Processes in hydraulic tank

Fig. 10 Processes in hydraulic tank
Fig. 10 Processes in hydraulic tank

The return-line filter first cleans dust particles from the recycled hydraulic fluid. The liquid still has a strong current upon entering the re-circulation area. The calming baffle suppresses the flow’s motion and prevents it from spreading to the suction area. Any air bubbles that might be present rise to the surface of the liquid and escape into the tank. Excess air escapes from the tank to the outside via breather (ventilation and exhaust). The liquid flows into the suction area through openings in the calming baffle’s floor area. The liquid dissipates heat to the outer air over the hydraulic tank’s entire surface, thereby cooling it.

Types of hydraulic tank or reservoir

Pressure in suction line

(Fig. 11)  Atmospheric tank
(Fig. 11) Atmospheric tank

For proper function of a pump, pump needs a continue feed of fluid. And therefore, pressure at suction line must be great enough. When tank is full, pressure at the inlet will be great enough (liquid pressure + atmospheric pressure). That is why much fluid is available for suction but if the fluid is just above the the inlet then pressure will be less enough and cause less fluid available for suction which can create cavity in pump.

In this way we can categories hydraulic into two types.

  1. Atmospheric tank
  2. Pressure tank.

Atmospheric Tank: Because of atmospheric tank is open with atmosphere via breather so, pressure on suction line depends only on the liquid level. Hence, we can not increase pressure any more. The total pressure will be the sum of pressure due to liquid level and atmospheric pressure

(Fig. 12) Pressure Tank
(Fig. 12) Pressure Tank

Pressure tank: In a pressure tank firstly, pressurised air is fed from external to maintain the require pressure and the second thing pressure regulator is added for regularising the pressure. As a result if pressure exceeds the required pressure a spring loaded check valve release the pressure and if pressure is lowered below atmospheric second check valve will allow atmospheric air into the tank.

We have completed all the basic od hydraulic tank and there types. Hope you learned something and will come soon for another interesting article. Till then bye bye. Thank you.

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