Vibration test apparatus and bearing therefor
AssigneeKimball Industries, Inc.
InventorDavid V. Kimball
Life of this patent
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Abstract
Hydrostatic bearing vibration test apparatus in which the pillow block housing is opertively coupled to the workpiece by an oil film while the carriage blocks are fixed to the workpiece and the bearing shaft, the housing being supported on flexible bolts permitting two degrees of freedom in the bearing appartus.
Claims53
Vibration test apparatus having an extended stroke and improved stiffness for use with a plate mounting a test article for vibration testing, comprising a hydrostatic journal bearing plate guide having a housing mounted on a base, a shaft shiftable axially in said housing, carriage block means for connecting said shaft to said plate for movement relative to said housing in a plane including said shaft axis, and oil film means for operatively coupling said plate and a surface of said housing in vibration damping relation.
Vibration test apparatus having an extended stroke and improved stiffness for use with a plate mounting a test article for vibration testing, comprising a hydrostatic journal bearing plate guide having a housing mounted on a base, a shaft shiftable axially in said housing, carriage block means for connecting said shaft to said plate for movement relative to said housing parallel to said shaft axis, and oil film means including a pressurized oil supply and a housing oil flow passage from said supply to a surface of said housing opposite said plate whereby said surface is operatively coupled to said plate in vibration damping relation.
Hydrostatic journal bearing adapted for supporting a test article-carrying slip plate in guiding relation, said bearing comprising a pressurized oil supply, a pillow block housing having an oil pressurizable bore and an oil film-covered surface opposed to said slip plate, a shaft journaled in said bore, and carriage block means for carrying said slip plate, said carriage block means being mounted on said shaft and fixed to said slip plate, said pillow block housing being movable relative to said slip plate and operatively coupled therewith through said oil film covering said pillow block housing surface in vibration damping relation.
Vibration test apparatus comprising an apertured granite block adapted to support a slip plate in oil-damped relation, and a hydrostatic journal bearing within the block aperture operatively coupled to said slip plate by an oil film, whereby the block non-damped portions of said slip plate corresponding to the apertured areas of said block are damped by said housing oil film, whereby the nondamped area of said slip plate is smaller than the area of said block aperture.
Vibration test apparatus comprising a granite block having at least one journal bearing receiving aperture and a smooth surface surrounding said aperture, said surface being adapted to support a slip plate in sliding relation coupled to a vibration source, a base supporting said granite block, at least one hydrostatic journal bearing in an aperature of said granite, said hydrostatic journal bearing being smaller than said aperture to define therewith an aperture clearance and comprising a pillow block housing defining a bore and a surface opposite said slip plate, a shaft journaled in said bore, an oil supply adapted to supply oil under pressure to said bore, an oil passage through said housing between said bore and said housing surface, said passage being adapted to convey oil at reduced rates of flow from said bore to said housing surface;
- carriage blocks at either side of said housing fixed to said shaft at a predetermined combined clearance relative to said housing of not less than 2.5 inches, said carriage blocks being fixed to said slip plate in a manner elevating said slip plate slightly above said granite block, said housing surface being lower than the height of said slip plate to damp said slip plate vibration at said housing surface, a pair of oil transferring webs carried by said housing in sliding contact with said granite block opposite said slip plate for transferring oil flowing on said housing surface across said aperture clearance to said granite surface in slip plate movement facilitating relation, longitudinally extended trough means in said housing surface, grooving in said slip plate surface, said trough and grooving being continuously in registration for movement of flowing oil from said trough to said slip plate grooving in web supported relation across said aperture clearance to damp said slip plate beyond said apertures;
- said housing being mounted to said base in spaced relation to said slip plate by a series of mounting bolts adapted to adjust said gap width, said mounting bolts being flexible over their exposed length between housing and base to permit transverse shifting of said housing within said aperture as well as axial motion of said shaft within said aperture, whereby said bearing has two degrees of freedom, and means to tension said bolts.
Method of vibration testing a test article, including supporting the article for vibratory motion on a plate, connecting said plate to a hydrostatic journal bearing in supporting and guiding relation, forming an oil film on a plate-opposing surface of a hydrostatic bearing housing, coupling a pair of carriage blocks between the hydrostatic bearing shaft and said plate in a manner defining a gap between said plate and said housing surface, and movably supporting the plate on said oil film, whereby the vibration induced in said plate is damped by said housing surface oil film.
Dependencies are inferred from the claim text.