摘要:
A magnetic liquid seal retains a magnetic liquid by means of the magnetic force applied thereto from a magnet. The magnet is constituted by a magnetized deformable member.
摘要:
A device for holding an object by electrostatic force includes a body made of a dielectric of a low resistivity, such as SiC, and an electrode provided on that surface of the device body facing away from a holder surface, so that a potential difference is produced between the object and the holder surface. A change-over switch for grounding the device body to an earth potential of an ambient environment is provided, so that the dielectric can be rapidly brought into a potential equal to the earth potential.
摘要:
A device for mounting magnetic discs on a spindle of a magnetic disc file assembly has a disc transfer mechanism provided with a disc supporting surface operative to support a disc in non-contacting and relatively movable relationship with a fluid film formed therebetween. The thus supported disc is axialy aligned, by a positioning mechanism, with the spindle and then released into engagement with the spindle. The floating support of the disc allows the disc to be moved relative to the disc supporting surface first into alignment and then into engagement with the spindle without any mechanical contact and friction between the disc supporting surface and the disc to thereby prevent the production of dusty material otherwise produced by mechanical contact between the disc and the supporting surface.
摘要:
A thrust bearing has a plurality of bearing pads each provided on its back side with a pivot, and a support on which the pads are disposed in the circumferential direction. An integral carrier is mounted on the support. The carrier has leg portions and a resilient portion and definies a squeeze film damper portion between the rear surface thereof and the opposing surface of the support. The pads are carried tiltably by the carrier through the pivots.
摘要:
A semiconductor cooling unit for directly jetting a cooling medium against surfaces of semiconductor devices for use in a high-speed computer or the like to effectively remove heat from the semiconductor devices, in which partition members for partitioning a space into regions where semiconductor devices are placed. Each partitioned region has an opening at its ceiling side, and a pipe for supplying or discharging the cooling medium through the opening is disposed so as to project toward a central portion of the back surface of each semiconductor device. This pipe is utilized to also section a cooling medium supply header or a cooling medium return header so that bubbles generated from the semiconductor device surfaces can be smoothly removed, and so that the cooling medium can flow smoothly onto the semiconductor devices.
摘要:
In a mechanical seal for the rotary shaft of a rotary machine wherein the pressure difference between the internal and external liquids acting on the mechanical seal changes from positive to negative, and vice versa, a ring and a seat ring are formed with mating seal faces which coact to seal between the internal and exterior liquid present externally and internally, respectively, of the retainer; the seat ring is securely and liquid-tightly mounted on the rotary shaft for rotation therewith in a casing; the ring is fitted over a retainer axially movably, but nonrotationally and is normally pressed against the seat ring under the force of a bias spring which provides the sealing force for maintaining the seal between the seal faces when the external liquid pressure exceeds the internal liquid pressure, but the pressure difference is relatively small; the retainer in turn is mounted in the casing nonrotationally but axially movably due to the difference in pressure between the internal and external liquids, whereby regardless of the difference in pressure between the internal and external liquids, the seal may be maintained securely.
摘要:
A fluid-tight closure apparatus for providing a fluid-tight seal between the inner peripheral surface of the cylindrical bore in an enclosure receiving therein a high-pressure fluid and the outer peripheral surface of an end closure wall held in the cylindrical bore. The apparatus has a pressurizing ring fitted around the outer peripheral surface at the inner end portion of the end closure wall for a small axial displacement. The pressurizing ring is adapted to derive the required sealing pressure from the internal fluid pressure in the enclosure. The apparatus further has a seal ring disposed between the pressurizing ring and the inner peripheral surface of the cylindrical bore and/or between the pressurizing ring and the end closure wall, and a bolt screwed through the end wall member into the pressurizing ring for imparing an initial sealing surface pressure to sealing areas, through the axial displacement of the pressurizing ring toward the end closure wall.
摘要:
A mechanical seal for use with shafts of rotary machines is of unitary construction for ease in handling. It can be attached to, and detached from, the sealing portion of the shaft accurately and readily. The attachment and detachment of the seal are expedited by the combination of a protuberance or protuberances of a shaft sleeve which is mounted on the shaft and carries a rotating seal element, and circumferential and axial grooves formed on the inner surface of a retainer which holds a stationary seal element.
摘要:
An electronic computer cooling system having a cooling apparatus to cool an electronic computer and cooling members for thermally connecting semiconductor devices whose operating speeds are raised by cooling to a low temperature source of the cooling apparatus. Circuit boards onto which the semiconductor devices and the like constructing the electronic computer are mounted and the cooling apparatus such as a refrigerating apparatus and the like are compactly enclosed in a single casing. Or, the circuit boards and the cooling apparatus are compactly enclosed in separate detachable casings, respectively. Thus, a structure in which desired semiconductor devices can be certainly cooled by using the cooling members is obtained.
摘要:
An active noise cancellation apparatus of an MRI apparatus, including a detector for detecting vibration of a bobbin or a driving signal of a magnetism generator as a noise source signal, error signal detectors for detecting actual noise near the ears of a patient, a circuit for generating a noise cancellation signal having an opposite phase to a phase of a noise signal generated by an MRI apparatus and having an amplitude proportional to the output of the error signal detectors, from the detected noise source signal and the output of the error signal detectors, and a sound generator for generating a sound wave by the noise cancellation signal.