An assembly for a compartment of a gas turbine engine that includes a housing, a gear, and a baffle disposed about the gear. The baffle includes an upstream portion and a downstream portion. The upstream portion includes an upstream inner wall and an upstream outer wall separated from the gear. The upstream inner wall is positioned between the upstream outer wall and the gear. An upstream flow channel is formed between the upstream inner wall and the upstream outer wall. The downstream portion of the baffle includes a downstream inner wall and a downstream outer wall separated from the gear. The downstream inner wall is positioned between the downstream outer wall and the gear. A downstream flow channel is formed between the downstream outer wall and the downstream inner wall.

There is disclosed an arrangement for separating an air-oil mixture in an oil distribution system of an engine. The arrangement comprises a distribution channel of the system, which defines a fluid flowpath suitable for receiving the air-oil mixture, and an ultrasonic transducer configured to insonate the fluid flowpath.

A hydraulic tank for a machine is disclosed herein. The hydraulic tank includes a casing defining an interior space and having an outer surface, an inner surface opposite the inner surface, and a return hydraulic fluid inlet extending through the casing. A first concave member is connected to the inner surface of the casing to form a passage. The passage is positioned and shaped to transport hydraulic fluid from the return hydraulic fluid inlet to another location within the hydraulic tank.

A gas and liquid separation system could be said to have a passage with an inlet connected to receive a mixed gas and liquid flow. An air separation tube extends into the passage at a location downstream of where the inlet is connected with an upstream tube end upstream in the passage relative to a downstream tube end. The upstream tube end provides an obstruction to the mixed gas and liquid flow, to cause separation of the gas from the mixed gas and liquid flow. A liquid tube is connected to the passage at a location downstream of the air separation tube.

An air bleeder includes a branch, a lubricant supply conduit, and a return conduit. Lubricant stored in a tank is to be supplied to a valve provided in a machine tool via the lubricant supply conduit. The lubricant supply conduit includes a first supply conduit, and a second supply conduit. The first supply conduit connects the branch and the tank. The second supply conduit connects the branch at a first connecting position and the valve. The return conduit connects the tank and the branch at a second connecting position higher than the first connecting position in a height direction along a height of the air bleeder to return lubricant to the tank and to remove air from lubricant in the lubricant supply conduit.

An oil tank assembly for a gas turbine engine may include an oil tank having an upper compartment and a lower compartment. A baffle may separate the upper compartment of the oil tank from the lower compartment of the oil tank. A de-aerator may be included, where the de-aerator includes an oil inlet, a de-aerator outlet, and an air vent. The de-aerator may be configured to separate air from oil in an air-oil mixture such that the oil flows through the de-aerator outlet and such that the air flow through the vent. Further, the de-aerator may include a fill port for receiving oil.

A vehicle driveline component with a housing, a rotary power transmission system, a lubricant and a lubrication de-aerator. The housing defines a cavity and a sump. The rotary power transmission system is received in the cavity and includes a plurality of gears that are in meshing engagement. The lubricant is received in the sump and is employed to lubricate the rotary power transmission system. The lubrication de-aerator is received in the housing and has at least one matrix of de-aeration cells that extend between an upper surface and a lower surface. Each of the de-aeration cells has a cell inlet, which is formed through the upper surface, and a cell outlet that is formed through the lower surface. Each of the de-aeration cells tapers between its cell inlet and its cell outlet.

An oil scavenge system for a gas turbine engine comprising an oil tank and at least one bearing chamber. The oil scavenge system comprises at least one primary scavenge pump, a manifold, a secondary scavenge pump, a deaerator and a filter unit. The at least one primary scavenge pump is configured to pump oil from the at least one bearing chamber to the manifold whilst raising the pressure of the oil from a starting pressure to a first pressure elevated with respect to the starting pressure. The manifold is pressurised to substantially maintain the oil at said first pressure. The secondary scavenge pump is configured to pump oil from the manifold at the first pressure and to raise the pressure of the oil to a second pressure elevated with respect to the first pressure before pumping the oil to the deaerator and through the filter unit to the oil tank.

An oil distribution system uses an oil storage container to contain an air/oil separation unit, a heat exchanger, and an oil reservoir. The functions of oil storage, air/oil separation, and cooling are integrated in the container. Hot aerated oil enters the container at an air/oil separation unit. The air/oil separator deposits hot de-aerated oil into the oil reservoir. The oil reservoir transfers hot de-aerated oil to conduits in a heat exchanger. The heat exchanger uses fuel to cool the oil and warm the fuel. Cooled de-aerated oil is provided to a mechanical device for lubrication and warmed fuel is provided to power an engine. The container may alternatively receive hot aerated oil into the conduits in the heat exchanger. Cooled aerated oil is delivered to the air/oil separation unit to deposit cooled de-aerated oil into the reservoir. Cooled de-aerated oil is pumped to a mechanical device to provide lubrication.

An oil tank system (100) for a gas turbine engine is provided. The oil tank system (100) includes an oil tank (102) having an upper tank portion (112) and a lower tank portion (114), a waisted section (118) being provided between the upper tank portion (112) and the lower tank portion (114). Oil is received by a de-aerator (104) of the system (100) which supplies de-aerated oil to the upper tank portion (112). The waisted section (118) includes an upper face (119) configured to catch oil drips from above the waisted section (118) and to guide oil to a lower face (121) of the waisted section (118).