Sealed hydraulic tank system for mining shovel
AssigneeBycyrus International Inc.
InventorsCarl D. Gilmore, Robert Weber, Perry DeCuir
Life of this patent
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Abstract
A sealed hydraulic tank system for a mining shovel (10) includes an upper tank (68) and a lower tank (70). An air bladder (69) system is coupled to the upper tank to exchange air between the tank system and the bladder. The tanks include baffles (100,102,104,106,108) which filter the hydraulic fluid and which direct fluid flow along an elongated path to allow for de-aeration of the oil in the tank.
Claims18
A tank system defining a fluid chamber for retaining hydraulic fluid used to control one or more hydraulic cylinder in a mining shovel, the tank system comprising:
- an upper tank;
- a lower tank, coupled to the upper tank by a transfer tube;
- and
- an expansion bladder, the expansion bladder coupled to the upper tank through an air transfer tube located exterior to the upper tank, wherein air is exchanged between the tank system and the bladder when the cylinder is activated.
A tank system defining a fluid chamber for retaining hydraulic fluid used to control one or more hydraulic cylinder in a mining shovel, the tank system comprising:
- an upper tank comprising an inlet, an outlet, and a plurality of baffles dividing the tank into compartments between the inlet and the outlet, wherein at least one of the baffles comprises an aperture for directing a flow of hydraulic fluid between the inlet and the outlet;
- a lower tank, fluidly coupled to the upper tank and including an inlet, an outlet, and a plurality of baffles dividing the tank into compartments between the inlet and the outlet, wherein at least one of the baffles comprises an aperture for directing a flow of hydraulic fluid between the inlet and the outlet;
- and
- an expansion bladder, the expansion bladder coupled to the upper tank, wherein air is exchanged between the tank system and the bladder when the cylinder is activated.
A tank system defining a fluid chamber for retaining hydraulic fluid used to control one or more hydraulic cylinder in a mining shovel, the tank system comprising:
- an upper tank;
- a lower tank, coupled to the upper tank by a transfer tube;
- and
- a cooler system connected between the upper and lower tanks, wherein when the hydraulic cylinders are activated, hot oil is returned to the upper tank and is transmitted through the cooler system and to the lower tank.
Dependencies are inferred from the claim text.