A health and condition monitoring system of an elastomeric component comprising an actuator, a sensor, and a processing unit. The sensor and the actuator need to be attached directly or indirectly to the elastomeric component. The actuator induces an impulse, or possibly a chirp, into the elastomeric component. The sensor senses the response, the impulse response function. The processing unit analyzes the impulse response function and determines a health and condition indicator. This is repeated and when enough indicators have been determined, then a health and condition marker can be determined, covering if the elastomeric component is in a start period of usage, in a main usage period or in a final period of usage.

A bearing support assembly includes a bearing assembly, a housing, and a centering spring. The centering spring is coupled to the bearing assembly and the housing. The centering spring includes a plurality of spiral beams. A first of the plurality of spiral beams is defined by a first end and a second end. The first end and the second end correspond to a first circumferential location that is defined relative to a longitudinal centerline of the bearing support assembly.

A bearing support assembly includes a bearing assembly, a housing, and a centering spring. The centering spring is coupled to the bearing assembly and the housing. The centering spring includes a plurality of spiral beams. A first of the plurality of spiral beams is defined by a first end and a second end. The first end and the second end correspond to a first circumferential location that is defined relative to a longitudinal centerline of the bearing support assembly.

In one embodiment, a rotor hub comprises a hub plate, a yoke for attaching a plurality of rotor blades, a plurality of yoke support bearings, and a plurality of cushioned damper bearings for attaching a plurality of dampers.

In one embodiment, a rotor hub comprises a hub plate, a yoke for attaching a plurality of rotor blades, a plurality of yoke support bearings, and a plurality of cushioned damper bearings for attaching a plurality of dampers.

A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a compressor with a gas bearing supplied with compressed gas and a controller. The controller is configured to determine an inlet pressure and outlet pressure of the gas bearing, determine a maximum speed limit based on the inlet pressure and the outlet pressure, and prevent the compressor from operating at a speed that is greater than the maximum speed limit A method of controlling a compressor includes calculating a maximum speed limit based on an inlet pressure and an outlet pressure of the gas bearing. The method also includes in response to determining that a speed setting is greater than the maximum speed limit, adjusting operation of the compressor such that a speed of the compressor is at or below the maximum speed limit.

An oil seal structure includes: a bearing unit for a shaft, being provided in a housing hole of a bearing housing; a damper positioned outside the bearing unit in a radial direction of the shaft to absorb vibration of the shaft; a seal body portion facing the damper through a gap in an axial direction of the shaft; a partition wall positioned between the damper and the seal body portion to divide the gap into a first space on the damper side and a second space on the seal body portion side; and a guide portion provided in the partition wall to be closer to an oil drain port than the shaft and having: an inner side in the radial direction of the shaft, being positioned on the first space side; and an outer side in the radial direction of the shaft, being positioned on the second space side.

An oil seal structure includes: a bearing unit for a shaft, being provided in a housing hole of a bearing housing; a damper positioned outside the bearing unit in a radial direction of the shaft to absorb vibration of the shaft; a seal body portion facing the damper through a gap in an axial direction of the shaft; a partition wall positioned between the damper and the seal body portion to divide the gap into a first space on the damper side and a second space on the seal body portion side; and a guide portion provided in the partition wall to be closer to an oil drain port than the shaft and having: an inner side in the radial direction of the shaft, being positioned on the first space side; and an outer side in the radial direction of the shaft, being positioned on the second space side.

A bearing assembly for supporting a unit of a motor vehicle on a structural component of the motor vehicle includes four bearings with an elastic center. The four bearings are arranged on the structural component of the motor vehicle such that the elastic centers of the bearings together define a two-dimensional surface on which the center of mass of the unit to be supported is located.

A bearing assembly for supporting a unit of a motor vehicle on a structural component of the motor vehicle includes four bearings with an elastic center. The four bearings are arranged on the structural component of the motor vehicle such that the elastic centers of the bearings together define a two-dimensional surface on which the center of mass of the unit to be supported is located.