Class / Patent application number | Description | Number of patent applications / Date published |
277418000 | Formed by plural grooves or projections on opposing surfaces | 19 |
20090160135 | LABYRINTH SEAL WITH REDUCED LEAKAGE FLOW BY GROOVES AND TEETH SYNERGISTIC ACTION - A labyrinth seal is disclosed having a stator, a plurality of teeth extending from the stator, each teeth having an end portion, and a rotor having an outside surface disposed next to the end portions of the plurality of teeth of the stator. The rotor further includes a plurality of grooves on the outside surface thereof, each groove is disposed between adjacent teeth of the stator, and a cavity formed between adjacent teeth and the each groove is configured to induce a vortex motion to a leakage flow from the high-pressure side to the low-pressure side of the seal so as to reduce a flow rate of the leakage flow. Methods of reducing a leakage flow in labyrinth seal are also disclosed. | 06-25-2009 |
20100052264 | COMPACT RESTRICTIVE SEAL FOR BEARING HOUSINGS - This invention relates to a restrictive seal of the labyrinth type of reduced external size. The invention has an inner deflector which is capable of retaining the lubricating oil within the bearing housing with great efficiency, and a highly accurate system for adjusting and aligning the elements of the labyrinths, ensuring an infinite service life. Because it has very much smaller external dimensions it can be applied as a replacement to the lip seals commonly in use without causing problems to accessory equipment connected to a pump. | 03-04-2010 |
20100225065 | Compact restictive seal for bearing housings - This invention relates to a restrictive seal of the labyrinth type of reduced external size. The invention has an inner deflector which is capable of retaining the lubricating oil within the bearing housing with great efficiency, and a highly accurate system for adjusting and aligning the elements of the labyrinths, ensuring an infinite service life. Because it has very much smaller external dimensions it can be applied as a replacement to the lip seals commonly in use without causing problems to accessory equipment connected to a pump. | 09-09-2010 |
20110156359 | TURBINE ENGINE SEALS - A seal in a turbine engine for preventing axial leakage through a radial gap between a stationary structure and a rotating structure, wherein the radial gap is defined by an inner radial surface that opposes an outer radial surface across the radial gap, the seal including: a first groove disposed on one of the inner radial surface and the outer radial surface; and a first tooth that projects radially from the other of the inner radial surface and the outer radial surface; wherein the first groove, at an upstream end, comprises a gradual slope that slopes away from the surface on which the first tooth is located and, at a downstream end, comprises a steep slope; and wherein the first tooth comprises an axial position that is approximately just upstream of the axial position of the upstream end of the groove. | 06-30-2011 |
20120126486 | SEALING ASSEMBLY FOR USE IN TURBOMACHINES AND METHODS OF ASSEMBLING SAME - A method of assembling a sealing assembly for use in a turbomachine includes providing a rotatable element that includes an end portion with a plurality of grooves partially extending circumferentially about a portion of an outer surface of the end portion of the rotatable element. The method also includes providing a stationary portion that includes an upper section and a lower section. The method further includes inserting at least a portion of the end portion of the rotatable element into the lower section. The method also includes coupling the upper section to the lower section, thereby defining a rotor shaft cavity. The end portion of the rotatable element at least partially extends through the rotor shaft cavity, thereby defining a clearance between the end portion of the rotatable element and the stationary portion. | 05-24-2012 |
20130154195 | SHAFT SEAL MECHANISM AND ROTARY MACHINE PROVIDED WITH SAME - A shaft seal structure capable of preventing a seal body of the shaft seal structure of a rotation body from being held in an inclined posture even when the seal body is inclined is provided. It includes, an accommodation body ( | 06-20-2013 |
20140175754 | SEAL DEVICE - A seal device including: three ring-shaped first vertical wall portions ( | 06-26-2014 |
20140232071 | Shaft Seal Assembly - An illustrative embodiment of porous media shaft seal assembly may include a stator and a rotor. The rotor may be configured to rotate with a shaft, and the stator may be engaged with a housing. Porous media may be applied and/or engaged with a portion of the stator, and a seal fluid may be communicated to the porous media. A biasing member may be employed to urge a portion of the rotor toward a portion of the stator, and seal fluid exiting the porous media may counteract the force of the biasing member. | 08-21-2014 |
20140246833 | Non-Contact Labyrinth Seal Assembly - A non-contact labyrinth seal assembly includes a carrier having cylindrical outer flange with an annular leg extending inwardly therefrom. An elastomeric body is attached to the leg. The body has a first pair of seal lips extending radially inwardly in diverging relation from one another and a second pair of seal lips spaced radially outwardly from the first pair of seal lips. The second pair of seal lips includes radially outermost and a radially innermost seal lips. The radially outermost seal lip has a cylindrical inner surface and an inner surface of the radially innermost seal lip has a first portion extending substantially parallel to the cylindrical inner surface to form an annular channel and a second portion extending radially outwardly to an innermost lip free end that is radially aligned with the cylindrical inner surface to form an annular opening having a width less than a width of the channel. A sleeve has an annular barrier extending radially outwardly to an annular flange that extends axially through the opening into the channel. | 09-04-2014 |
20140252721 | SLOTTED LABYRINTH SEAL - A seal for use in a machine, such as a machine with rotating members, includes a labyrinth seal with multiple fins. The seal is slotted and is designed to limit fluid flow to the desired amount from the high pressure side of the seal to the low pressure side of the seal inside partially or exclusively radially extending cavities between two rotating members. The rotating members may operate at different speeds with a common axis of rotation. The seal remains effective when the rotating members move axially in relation to one another despite the fins having a component parallel to the axis of rotation. | 09-11-2014 |
20160061265 | Seal Arrangement for non-contact sealing of anti-friction bearings - In summary, the invention relates to a seal arrangement for non-contact sealing of anti-friction bearings, in particular for sealing anti-friction bearings in conveyors, machine tools, pumps, electric motors and the like. More specifically, the invention relates to an improvement of the arrangement of non-contact fluid-collecting labyrinth seals which perform a sealing function, such that firstly no lubricating oil can escape from the anti-friction bearing side and secondly no water and contaminant can enter from the atmosphere side. The seal arrangement of the invention consists of a three-piece pre-assembled labyrinth seal, of which at least one sealing element is arranged together with the surrounding, stationary machine part and at least one sealing element is arranged on a rotatable machine part. One core advantage of this invention consists in that, if the seal arrangement according to the invention is used, a satisfactory and effective sealing result is achieved despite somewhat severe surging flooding to the sealing elements which occurs. | 03-03-2016 |
277419000 | Interfitting or overlapping | 8 |
20090058013 | Labyrinth compression seal and turbine incorporating the same - A uniquely configured rotating seal tooth is used in conjunction with commonly used labyrinth-type seals that provide a seal between a rotating component and a stationary component. The uniquely configured rotating seal tooth produces a compression mechanism to counter leakage flow through the labyrinth of seal teeth, thereby lessening the pressure gradient that drives leakage and reversing the direction of some of the leakage flow. | 03-05-2009 |
20100276892 | PACKING SEAL ROTOR LANDS - In one embodiment, a packing seal has a plurality of lands that align with annular teeth. Each land has opposite axial sides relative to a rotational axis of a rotary component. Each land also has a recess in at least one of the opposite sides. | 11-04-2010 |
20110068540 | STAGGERED SEAL ASSEMBLY - An improved staggered seal assembly uses a static element and a rotating element to create a seal. The static element surrounds the rotating element and has at least one fin. The rotating element has at least one long fin and a set of shorter fins. A third component has a staggered fin. The fins create a leakage flow path which throttles the leakage across the seal from a high pressure zone into a low pressure zone. | 03-24-2011 |
20110272893 | Labyrinth Seal For A Turbomachine - Labyrinth seal for a turbomachine having a plurality of elongated seal blades arranged along a longitudinal direction of the labyrinth seal next to one another and at a distance from one another so that a chamber is formed between adjacent seal blades. The seal blades each have a free end and at least one seal wall extending in longitudinal direction of the labyrinth seal. A seal gap is formed between each free end and the seal wall, adjacent chambers being in fluid communication with one another by the seal gap so that a working fluid impinging on the labyrinth seal can flow through the labyrinth seal in a throttled manner in a throttling direction proceeding from a first seal blade to a final seal blade. A fluid discharge device is provided that is arranged to bring about a continuous reduction in a specific enthalpy of the working fluid by discharging working fluid from the labyrinth seal along the throttling direction. | 11-10-2011 |
277420000 | And axially oriented | 4 |
20080309019 | SEALING ASSEMBLY FOR ROTARY MACHINES - A sealing assembly is provided. The sealing assembly includes a foil disposed circumferentially around a rotating component and configured to provide primary sealing to the rotating component between high pressure and low pressure sides and a spring system disposed adjacent to the foil. The spring system includes a plurality of features to facilitate foil surface to follow excursions of the rotating component, wherein the plurality of features provide secondary sealing from the high pressure to the low pressure sides between the foil and a stationary component. | 12-18-2008 |
20100090414 | ROTARY SEAL - The invention relates to a rotary seal that comprises first ( | 04-15-2010 |
20120091662 | LABYRINTH SEAL SYSTEM - A labyrinth seal system is disclosed, including a stationary component having a plurality of radially inwardly projecting, axially spaced teeth extending therefrom; and a rotor having a plurality of radially outwardly projecting, axially spaced protrusions, each protrusion having a low pressure side and a high pressure side, wherein the low pressure side of at least one protrusion extends farther in a radial direction than the high pressure side. | 04-19-2012 |
20160161003 | SEALING ELEMENT WITH ADDITIONAL RING - A sealing element for sealing a cylindrical inner surface of a first machine component and a cylindrical outer surface of a second machine component includes an inner ring, an additional ring arranged coaxially to the inner ring, the additional ring being connected to a part of an outside lateral face of the inner ring, an outer ring arranged coaxially to the inner ring, and a sealing gap, which is formed by an external lateral face of the inner ring, an internal lateral face of the outer ring and an external lateral face and an end face of the additional ring and which in axial section through the common axis of the inner ring, the outer ring and the additional ring has a meandering profile. | 06-09-2016 |