摘要:
A compressor includes a housing, a shaft that is rotated relative to the housing to compress a working fluid, and a foil bearing that supports the shaft. The foil bearing includes a top foil. The foil bearing is a foil gas bearing that is backed up by a ball bearing, or a mesh foil bearing with an actuator to compress a wire mesh dampener. A heat transfer circuit includes a compressor and a working fluid. The compressor includes a shaft that is rotated to compress the working fluid, and a foil bearing for supporting the shaft as it rotates.
摘要:
Coast-down bearing apparatus and methods are provided. The coast-down bearing includes a plurality of segments each having a radius of curvature substantially equal to an outer radius of a shaft and spaced radially therefrom to define a clearance, with the plurality of segments being configured to receive the shaft when a magnetic bearing drops the shaft. The coast-down bearing also includes a plurality of slots disposed between adjacent ones of the plurality of segments.
摘要:
Disclosed herein are a rotary atomizer and an air bearing protection system for the rotary atomizer. The structure of the system is simplified to reduce the manufacturing cost. An air bearing is used to enable high-speed rotation along with savings in the maintenance and repair cost. Compressed air can be temporarily supplied at emergency such as interruption of the compressed air. Thus the stability and durability of the entire system are improved, such as prevention of air bearing failure.
摘要:
The device for temporary repair of auger carrier bearings is an assembly used to serve as a temporary to semi-permanent replacement for the carrier bearings of auger rotary shafts. The assembly comprises a U-bolt having threaded legs and a flat strap having two openings that are aligned with the threaded legs of the U-bolt. The points of contact between the auger rotary shaft and the assembly are the middle of the strap and the arch of the U-bolt. To these points are attached pads of self-lubricating plastic to provide a low friction interface between the assembly and the auger rotary shaft. The device for temporary repair of auger carrier bearings hangs from a plate that spans the tray of the auger and has two openings that correspond to the legs of the U-bolt.
摘要:
A bearing arrangement which is to be used for supporting a rotatable shaft used in a system employing a pressurized medium at a pressure which is partially dependent on the speed of rotation of the shaft includes a main bearing sleeve mounted on a support and surrounding the shaft. The working medium is supplied between the shaft and the bearing sleeve to fully support the shaft in the bearing sleeve when the pressure of the working medium exceeds a predetermined value. The bearing arrangement further includes at least one, but possibly more than one, auxiliary bearing including a split bearing ring which has a conical outer circumferential surface and a stationary outer bearing ring surrounding the split bearing ring and having a conical inner ramp surface. A resilient spring acts on the split bearing ring in one axial direction of the shaft against pressure forces of working medium to cause the contact surface to slide on the ramp surface with an attendent reduction in the transverse dimensions of the split bearing ring to bring the inner surface of the split bearing ring into supporting contact with the shaft for the auxiliary bearing to furnish at least a portion of the required supporting effect when the pressure of the working medium is below the predetermined value.
摘要:
A water lubricated bearing assembly having a plurality of circumferentially spaced first set of bearing elements with substantially flat surfaces and water courses therebetween supporting a shaft for rotation. Certain ones or all of such bearing elements support a second set of bearing elements that are moveable radially into supporting engagement with the shaft such that either the first set or the second set of bearing elements are the prime supports for the shaft and wherein such first and second set of bearing elements have different coefficient of friction.
摘要:
A containing bearing for supercritical rotors surrounding the rotor and operating to stabilize the rotor in the presence of radial rotor vibrations. A gap is present between the containing bearing and the rotor and is of a size equal to or larger than the maximum amplitude of vibration of the rotor in normal operation. An outer race of the containing bearing is supported by an oblong, resilient sleeve which extends coaxially to and in extension of the rotor which at its far end is fixed to prevent rotation.
摘要:
A bearing for supporting at least first and second members for movement relative to one another comprising a rolling bearing assembly including at least a pair of spaced apart rings having confronting raceways and a plurality of rolling elements in the annular space between said rings, one of said rings being mounted on one of said members, and a hydrostatic bearing assembly cooperatively associated with said rolling bearing assembly and including an element mounted on said other member having a surface confronting said other ring, means defining at least one chamber for a fluid medium under pressure formed by at least one pocket in said surface of said hydrostatic bearing element and the outer surface of said other ring whereby in operation of the bearing under applied load, when said chamber is pressurized, pressurization of said chamber operates to produce a force acting in a line containing the rings and rolling elements and in a direction to counterbalance the applied load and the rings rotate at substantially the same angular rate due to the fact that the friction in the rolling bearing is higher than in said hydrostatic bearing and said other ring engages the surface of said hydrostatic bearing when said chamber is not pressurized whereby said rings rotate relative to one another.
摘要:
A bearing for substantially vertical shafts rotated at high speeds by electric motors or the like utilizes a spherical thrust bearing at the lower end of the shaft with an elastic radial bearing mounted on the upper portion of the shaft. The upper radial bearing comprises a magnetic radial bearing having a plurality of polarly magnetized annular or disc-like inner rings mounted adjacent to each other on the shaft and a plurality of polarly magnetized annular or disc-like outer rings separated from the inner rings by an air gap. The inner and outer rings are magnetically so disposed that they repel each other and thereby stabilize the shaft in the radial direction. An annular bearing member is also provided to cooperate with the magnetic radial bearing to prevent damage to the magnetic bearing because of excessive deflection of the shaft from its vertical position during the initial start up of the shaft.