Sealed hydraulic tank system for mining shovel

摘要

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.

主权项

1. 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 a plurality of baffles partitioning the upper tank into a plurality of compartments, wherein a first baffle includes a first aperture formed within the first baffle and a second baffle includes a second aperture formed within the second baffle, wherein the first and second apertures are configured to direct a flow of fluid through the upper tank, wherein the second baffle extends perpendicular to the first baffle and is positioned downstream of the first baffle such that the first and second apertures form a serpentine flow path having a substantially right angle turn, and wherein the first and second baffles are configured to direct the flow of hydraulic fluid through the serpentine flow path to filter contaminants from and de-aerate the hydraulic fluid; a lower tank coupled to the upper tank by a transfer pipe; 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.