A gantry-type positioning device includes a planar base parallel to first and second directions. Two first linear axes are arranged in the first direction, each having a first linear drive. A frame held by the first linear axes is movable in the first direction, and comprises two transverse and two longitudinal beams. The transverse beams carry second linear axes with second linear drives parallel to the second direction, so that a movable element arranged between the transverse beams is movably held by the second linear actuators. The frame is flexibly constructed such that the movable element is rotatable about a third direction which is perpendicular to the first and second directions. With respect to the third direction, the movable element is guidable by a guide surface of only one of the transverse beams serving as a guide beam for the movable element.

A linear electromagnetic machine includes a stator, a translator, and a bearing system. The bearing system maintains alignment against lateral displacement of the translator relative to the stator, as the translator reciprocates axially. More particularly, the bearing system maintains a motor air gap between the stator and a magnetic section of the translator. The stator includes a plurality of stator teeth and windings, which form a plurality of phases. The stator teeth and windings are arranged using a hoop stack with spines to form a stator bore and define the motor air gap. The bearing system can include bearing housings that are configured to form a bearing interface with a surface of the translator. The bearing interface can include a contact bearing or a non-contact bearing, such as a gas bearing. Current is controlled in the phases to convert between electrical energy and kinetic energy of the translator.

Systems, methods, and apparatuses are disclosed for external mobility systems for heavy machinery and equipment. In one embodiment, an example system may include a first module, a second module coupled to the first module, and a third module coupled to the first module and the second module. Systems may include an air bearing system disposed under the third module, where the air bearing system is configured to apply an upward force on the third module, and an air supply coupled to the air bearing system. The upward force on the third module may reduce a static friction of the third module with respect to a floor surface by at least 90%, such that the third module can slide from a default position to an expanded position.

The present disclosure provides a split-type swing angle adjustable aerostatic bearing device for rotor static balance and an air flotation support device for static balance of rotating ring-shaped parts, the split-type swing angle adjustable aerostatic bearing device for rotor static balance and an air flotation support device for static balance of rotating ring-shaped parts belong to a field of static balance detection, and aims to solve a problem of low measurement precision of rotor and realize static balance of rotating ring-shaped parts. A gas mold, having a certain bearing capacity, is formed between an outer surface of the air flotation support cover under the bearing base and a concave surface of the upper base, so that the bearing base is floated to realize an automatic centering of the rotor static balancing device.

The present disclosure is directed to a gas-lubricated bearing assembly for a gas turbine engine and method of damping same. The bearing assembly includes a bearing pad for supporting a rotary component and a bearing housing attached to or formed integrally with the bearing pad. The bearing housing includes a first fluid damper cavity, a second fluid damper cavity in restrictive flow communication with the first fluid damper cavity via a restrictive channel configured as a clearance gap, and a damper fluid configured within the first and second fluid damper cavities. More specifically, the damper fluid of the present disclosure is configured to withstand the high temperature environment of the engine. Thus, the bearing housing is configured to transfer the damper fluid from the first fluid damper cavity to the second fluid damper cavity via the restrictive channel in response to a force acting on the bearing pad.

An aerostatic bearing includes a base having a foundation layer and a plurality of ventilation bodies protruding from the foundation layer, the ventilation bodies being made of a porous material; and a sealing layer covering the base and revealing at least one of the ventilation bodies.

A rotation system (10) is disclosed having at least one axial gas bearing, containing: a housing (11), a shaft (12) that can be rotated relative to the housing (11), at least one bearing plate (13) attached to the shaft (12), and at least one bearing assembly (14) which supports the bearing plate (13) relative to the housing (11), via an axial gas bearing. The bearing assembly (14) has, from inside to outside, a radially inner region (15) supporting the bearing plate (13), a radially central region (16) and a radially outer region (17) held by the housing (11). The radially inner region (15) contains at least one axial bearing element (19) and at least one retention element (20). The bearing plate (13) is supported by the axial bearing element (19), and the retention element (20) holds the axial bearing element (19) in the axial direction.

A vibration isolation system including a support, a forward actuator and a return device. The support is for supporting the body on a base. The support has a body engaging surface and a base engaging surface. The base engaging surface is arranged to couple to the base. The support couples the body engaging surface to the body in a coupled state. The support uncouples the body engaging surface from the body in an uncoupled state. The forward actuator moves the body and the body engaging surface together relatively to the base in a first direction from a first initial position to an end position in the coupled state. The return device is configured to move the body engaging surface relatively to the body opposite to the first direction from the end position to a second initial position in the uncoupled state.

Provided is a contactless vertical transfer device using a linear motor. The contactless vertical transfer device using a linear motor includes: a transfer unit for picking up an article; and a linear motor located on a side portion of the transfer unit to move the transfer unit, wherein the linear motor comprises at least one driving unit that is located on a side portion of the transfer unit and provided with a mover which a coil is wound; and a rail unit that is located apart from the mover by a predetermined distance in a lateral direction and provided with a plurality of magnet portions disposed in a transfer direction of the transfer unit. The transfer unit is moved along the rail unit by a thrust force of the mover and the magnet portion.

Aircraft cabin blower systems and methods of operating aircraft cabin blower systems are provided. One aircraft cabin blower system comprises: a cabin blower compressor having a contactless bearing arrangement; a transmission having a transmission output arranged to drive the cabin blower compressor, a first transmission input arranged to receive mechanical power from a gas turbine engine, and a second transmission input; a reversible variator arranged to receive power from the gas turbine engine and to output mechanical power to the second transmission input, the reversible variator operable to output in both forward and reverse directions of rotation; and a controller configured to control an output speed and direction of rotation of the reversible variator.