An oiling device includes a passage system that circulates and feeds oil to an oiling object. A control unit includes a storage unit that has stored therein a first abnormality pressure set value that differs according to oiling temperature; the first abnormality pressure set value is set to a lower pressure as the oiling temperature is higher. The control unit executes an abnormal stop of the oiling object when an oiling pressure detected by an oiling pressure detecting unit is equal to or lower than the first abnormality pressure set value corresponding to an oiling temperature detected by an oiling temperature detecting unit.

A method for axial support of a pump or compressor rotor shaft during start-up or shut-down of a vertical fluid displacement module for subsea operation including a motor and a pump or compressor. Lubrication fluid is momentarily supplied for hydrostatic operation of hydrodynamic thrust bearing(s) from a topside or land-based fluid supply via a flow control module arranged in conjunction with a subsea pressure control unit configured for controlling the supply and discharge of barrier and lubrication fluids to/from the fluid displacement module.

A pump system, method of manufacturing same, and vehicle includes: a housing with a pump and an electric motor; a pump inlet; a pump outlet; and a drive shaft driven by the motor, for driving the pump to pressurize fluid. An intermediate housing wall is positioned between the pump and motor, covers a motor cavity, and has a return port. An auxiliary circuit directs a portion of fluid flow to the motor cavity. A fill level control plate is positioned between the wall and the motor cavity, forming an overflow region therebetween, and includes an overflow opening for flow from the motor cavity to the overflow region. The plate causes a liquid level within the motor cavity to rise and a return path directs fluid through the overflow opening in the plate and relatively down the overflow region, to return back to the pump via the return port.