A lubrication system for a gas turbine engine is disclosed. The lubrication system is configured to provide pressurized air and lubricant to a bearing sump of the gas turbine engine to cool and lubricate a bearing included in the bearing sump.

A system for harvesting energy from a lubrication event includes a fluid pump, a fluid injector, an energy harvesting device, a wireless transmitter, and a controller unit. The fluid injector receives fluid from the fluid pump. The fluid injector is connected to the energy harvesting device, which is configured to produce electrical energy in response to a firing of the fluid injector. Electrical energy produced by the energy harvesting device powers the wireless transmitter, which is configured to transmit a wireless signal. The wireless signal indicates that the fluid injector fired. The wireless signal is received by the controller unit, which controls the fluid pump.

A gas turbine engine includes a fan, a compressor, a combustor, a turbine, a bypass duct, and a bearing compartment assembly. The bearing compartment assembly includes a fluid pump, a compartment, a fluid line between the fluid pump and the compartment, and a damper check valve located in the fluid line. The damper check valve is a unitary, monolithic component that is configured to restrict a reverse flow from the compartment to the fluid pump substantially more than the damper check valve restricts a standard flow from the fluid pump to the compartment.

A changeover valve for a single line parallel lubrication system includes a base housing, a first housing, and a second housing, which are distinct and separable units arranged to provide direct fluid communication between base housing, first housing, and second housing fluid channels. The base housing includes a plurality of fluid channels. The first and second housings each include a spool mounted in a cylindrical bore and hydraulically displaceable between ends of the cylindrical bore and a plurality of fluid channels fluidly connected to the cylindrical bore. The first and second housings are configured to mate with the base housing in a fluid seal. At least one of the base housing, first housing, and second housing includes and a relief valve in fluid communication with one or more of the plurality of base housing, first housing, and second housing fluid channels.

An autofill shutoff valve includes a valve body mounted to a lubricant reservoir and secured to a fill tube extending into the reservoir. The autofill shutoff valve has a valve stem extending through the valve body and into the lubricant reservoir. The valve stem is actuated by a plate disposed within the reservoir from a first position, wherein lubricant flows from a lubricant inlet to a lubricant outlet through the valve body, to a second position, wherein the valve stem blocks the flow of lubricant through the valve body. The autofill shutoff valve provides lubricant directly to the reservoir, thereby eliminating external plumbing and the autofill shutoff valve also prevents overfill of the reservoir by cutting off the flow when the reservoir is full.

A generator includes a stator with a stator winding, a rotor with a field winding supported for rotation relative to the stator, and a housing enclosing the stator and the rotor. The housing has an independent system port that is connected to a shared system port by a selector. The selector fluidly couples the stator and one of the independent system port and the shared system port. The selector also fluidly separates the stator from the other of the independent system port and the shared system port. Generator arrangements and methods of making generators are also described.

A vent valve for an actuator disposed in a lubricant reservoir includes a bore extending through the plate, a seal disposed within the bore proximate a top surface of the plate, a retaining member extending about a lower opening of the bore, and a ball disposed within the bore between the seal and the retaining member. The vent valve is configured to allow air to pass from a lower portion of a lubricant reservoir as lubricant fills the lower portion. The vent valve also allows air to pass to the lower portion of the lubricant reservoir as lubricant is dispensed from the reservoir. The vent valve closes when the lubricant level reaches the vent valve, thereby preventing lubricant from flowing through the vent valve. The sealed vent valve allows the actuator to rise in response to a rising lubricant level.

The current invention includes manifold having multiple outputs and at least one input for lubricant to be pumped at high pressure from a skid or trailer to a particular frac valve when the valve requires lubrication. Generally such frac valves require lubrication on an hourly schedule or less. Each output port on the manifold is fitted with an on/off valve that allows remote operation such as pneumatic, hydraulic, electro-pneumatic operation, or other known remote operation system. The pump or pumps are also configured for remote operation. A controller is then provided so that each circuit allows, upon command, lubricant to be pumped from the lubricant reservoir, through the pump, to the manifold, through each remotely operable valve, via each output port, through an appropriate rated hose, then to the lubrication or other port on each frac valve. Generally, once connected each frac valve remains connected to the system to allow the operator to cause lubricant to flow to each valve upon command. The controller may also provide a safety cutout so that the system will only provide pressurized lubricant with the controller in the operator's possession while the operator continuously actuates the appropriate switch.

The current invention includes manifold having multiple outputs and at least one input for lubricant to be pumped at high pressure from a skid or trailer to a particular frac valve when the valve requires lubrication. Generally, such frac valves require lubrication on an hourly schedule or less. Each output port on the manifold is fitted with an on/off valve that allows remote operation such as pneumatic, hydraulic, electro-pneumatic operation, or other known remote operation system. The pump or pumps are also configured for remote operation. A controller is then provided so that each circuit allows, upon command, lubricant to be pumped from the lubricant reservoir, through the pump, to the manifold, through each remotely operable valve, via each output port, through an appropriate rated hose, then to the lubrication or other port on each frac valve. Generally, once connected each frac valve remains connected to the system to allow the operator to cause lubricant to flow to each valve upon command. The controller may also provide a safety cutout so that the system will only provide pressurized lubricant with the controller in the operator's possession while the operator continuously actuates the appropriate switch.

A centerfill assembly for a lubricant reservoir includes a hollow tube for receiving lubricant from the top of the reservoir and loading the lubricant into the reservoir near the bottom of the reservoir. Loading the lubricant near the bottom of the reservoir introduces lubricant near where the stirring paddles mix the lubricant and near where the lubricant is loaded to the lubricant pump. Adding the lubricant near where the pumps load and near the stirring paddles helps to eliminate air pockets in the lubricant. In addition, having the centerfill rod minimizes exterior plumbing and allows for the mounting of valves on the fill line.