초록 ▼

An oscillating pneumatodynamic bearing takes the form of a laminated transducer disk cooperating with a flat surface or a tubular transducer cooperating with a rod or an enclosing tube. Such bearings are also known as squeeze bearings. At least one piezoelectric, magnetostrictive or electrostrictive

An oscillating pneumatodynamic bearing takes the form of a laminated transducer disk cooperating with a flat surface or a tubular transducer cooperating with a rod or an enclosing tube. Such bearings are also known as squeeze bearings. At least one piezoelectric, magnetostrictive or electrostrictive material is laminated with another material to provide oscillation of the transducer portion of the bearing so that the transducer portion is able to fly above a bearing surface on a fluid which is usually ambient air compressed by the mechanical oscillation of the transducer portion at an ultrasonic frequency. The disk or the tube is connected mechanically to supports and to its electrical sources of energy or signals at points along the loci of zero oscillation or minimal oscillation. With a laminated disk, a nodal circle is the locus of zero oscillation. In the case of the tube, a number of parallel strips of reversed polarity transducer material are alternately connected together by an interdigitated electrode design of spacing grooves between an enveloping conductive layer which overlies the piezoelectric layer laminated to a metallic base. Bearings for armatures of linear motor types of actuators for reciprocating magnetic recording heads within magnetic recording disk files can employ a set of disk type bearings or a combination of a tubular bearing with at least one disk type bearing.

대표청구항 ▼

A low friction fluid bearing assembly including in combination, a supporting surface, a squeeze bearing cooperating with said supporting surface to fly on said supporting surface, an object carried upon said bearing for frictionless movement upon said support, said squeeze bearing including a transd

A low friction fluid bearing assembly including in combination, a supporting surface, a squeeze bearing cooperating with said supporting surface to fly on said supporting surface, an object carried upon said bearing for frictionless movement upon said support, said squeeze bearing including a transducer adapted for flexing of said bearing to produce fluid pressure to generate a positive supporting fluid force for a load to be carried on said squeeze bearing, and transducer material selected from magnetostrictive, electrostrictive, and piezoelectric materials included in said bearing, said squeeze bearing comprising at least one said transducer material laminated and bonded with another material to form a transducer for said bearing, said bearing flexing and unflexing in response to the frequency of excitation applied to said bearing, said flexing and unflexing of said bearing compressing ambient air by the mechanical oscillation of said transducer as it flexes and unflexes to cause said squeeze bearing to fly on said compressed air on said supporting surface, said bearing having mechanical nodes of flexing and unflexing.