General Electric Company

Other

Edward H Miller

Kenneth Elmer Robbins

Norman J Lipstein

Markus A Eggenberger

James V Eats

Platforms are described for positioning a patient's knee for X-ray evaluation. The basic platform comprises upper and lower leg supports which are angled relative to each other at a fixed angle of 40 deg. The patient lies in a supine position with his leg flexed by the platform. Means are provided for positioning an X-ray film cassette generally parallel with a plane intersecting the bisecting the apex of the supports. An alternate platform provides means for tilting the platform, as well as a removable insert in the lower leg support, to facilitate X-ray examination of children and other person of short stature. The second platform also provides means for restraining the patient's lower leg to enable X-ray examination of the knee joint with the patient's quadrecepts muscles tensioned. A third platform is provided with a hinge connection between the upper and lower leg supports to enable X-ray evaluation of a knee at variable angles of flexion.

Platforms for X-ray examination of knee joints

Ventilation apparatus for creating a fluid flow through the interhub spacing between the hubs of adjacent turbine wheels which are not integral with the rotor of the turbine includes an outward radial extension of the hub of the downstream wheel and/or a roundoff of the hub of the upstream wheel and/or a displacement of the axis of the hub of the upstream wheel from the axis of the hub of the downstream wheel for increasing the static pressure over a first predetermined arcuate portion of the interhub spacing in an ancillary fluid flow between the hubs and a seal circumferentially surrounding the hubs. Also, either alone or in combination with the static pressure increasing devices, static pressure reduction apparatus includes an outward radial extension of the hub of the upstream wheel and/or a roundoff of the hub of the downstream wheel and/or a displacement of the axis of the hub of the upstream wheel from the axis of the hub of the downstream wheel for decreasing the static pressure over a second predetermined arcuate portion of the interhub spacing in the ancillary flow. Preferably, the first predetermined arcuate portion is disposed diametrically opposite to the second predetermined arcuate portion.

Ventilation of turbine components

In a steam turbine having a wheel secured to a rotatable shaft by a key and cooperating keyway, a passageway provides steam flow communication between an axial end of the keyway and a first location on an axial end of the wheel. A channel provides steam flow communication between the other axial end of the keyway and a second location on the axial end of the wheel. The first and second location are preferably diametrically opposed. Steam may be directed to enter the passageway at the first location, flow along the keyway and channel and exit at the second location, thereby ventilating the key and keyway.

Turbine wheel key and keyway ventilation

A baffle for improving coolant gas flow distribution in the gap region of a gas cooled dynamoelectric comprises a perforate member defining at least one gas flow path therethrough. The baffle preferably is spaced from the arcuately surrounds the rotor of the generator, wherein the gas flow path provides communication between the end space region and gap region of the generator. The member may define a plurality of gas flow paths disposed in a predetermined array. Gas exiting the gas flow paths may be directed from substantially parallel to the axis of rotation of the generator to an outwardly radial angle of about 30.degree. with respect to the axis of rotation. The size, spacing and disposition of the gas flow paths are coordinated with circumferential gas flow paths around the baffle to provide rapidly radially diffused coolant gas flow downstream the baffle, thus ensuring adequate coolant gas flow to stator core coolant ducts of the generator.

Baffle for improving coolant gas flow distribution in the gap region of

Labyrinth sealing apparatus to prevent rotational instability in the rotor of a steam turbine wherein such instability is of the type induced by steam whirl within the labyrinth seals. In a preferred form, the apparatus includes a plurality of fixed, spaced-apart annular teeth surrounding the shaft of a steam turbine whereby each tooth has a radially inner edge in very close proximity to the rotor surface, and further includes a fixed circumferential row of spaced-apart flow directing vanes encircling the rotor on the upstream side of the annular teeth. Each vane of the row extends radially inward to within very close proximity of a raised annular land on the shaft surface just opposite the vane row. The row of flow directing vanes and the raised land cause substantially the entire quantity of steam which enters the seal to pass through the row of flow directing vanes. Steam flow within the seal is caused to have a retrograde component counter to the direction of shaft rotation. This produces stabilizing forces on the rotor to neutralize destabilizing forces.

Rotor stabilizing labyrinth seals for steam turbines

A moisture separator reheater combination includes specially located perforated baffles which function to reduce components of steam fluid velocity flow which are substantially parallel to the cylindrical axis of the moisture separator vessel. These baffles counteract the effects of transverse vortices which produce local pressure variations and adversely affect the efficiency of the moisture separator elements. The use of the baffles of the present invention improves the uniformity of steam flow through the moisture separator elements.

Baffled moisture separator

In a steam turbine, the presence of water slugs can have an adverse effect on certain turbine parts. One particular area of concern is the low-pressure end of the turbine wherein excess moisture is more likely to occur. Another source of moisture is an extraction line interconnecting a turbine stage with a feedwater heater. It is possible for wet steam and/or water slugs to travel from the feedwater heater to the turbine and vice-versa. The present invention provides a monitoring device for a steam conduit which detects the presence of water slugs or wet steam in a steam conduit and will further indicate a reverse direction of flow in the steam conduit.

Growing community of inventors

Rexford, NY, United States of America

Edward H Miller