Abstract: Provided is a floating ring type mechanical seal in which a floating ring is pinched and held between a rotary ring provided in a rotary shaft and a stationary ring provided in a seal casing to be movable in an axial direction while being urged toward the rotary ring so that a relative rotation of the floating ring with respect to the stationary ring is inhibited. The rotary ring is made of a sintered compact of SiC or cemented carbide. A diamond film is formed on a sealing surface sliding on the floating ring in the rotary ring. A diamond film continuous to the diamond film of the sealing surface is formed on an outer peripheral surface of the rotary ring and a rear surface, which is a surface opposite to the sealing surface, in the rotary ring.

Abstract: The present disclosure relates generally to a sliding seal between two components. The sliding seal includes a first seal section and an uncoupled second seal section which allows the first and second seal sections to move relative to one another during relative movement between the two components. A wave spring disposed between the first and second seal sections biases the first and second seal sections away from one another. A compliant seal is carried by the second seal section. Other combinations of seal sections, wave springs, and compliant seals are also disclosed.

Abstract: A slide ring includes a main body composed of grey cast iron, wherein at least a partial region of a functional surface has a ledeburitic microstructure at the surface. A method for producing such a slide ring includes heating a functional surface of the slide ring by irradiating with high-energy radiation, wherein the irradiation is carried out so that at least a partial region of the irradiated surface is remelted, wherein the parameters of the irradiation are selected so that at least a partial region of the functional surface has a ledeburitic microstructure after cooling.

Abstract: A packing seal is provided for a system for sealing the shaft of a primary motor-driven pump unit of a nuclear reactor, intended to ensure sealing between the primary circuit and the atmosphere. The packing seal includes a rotary active surface and a floating active surface, and a face of the floating active surface and/or the rotary active surface is covered by a protective layer made from a material having surface energy greater than 30 mJ/m2 and an electron donor component less than 15 mJ/m2.

Abstract: A seal assembly for a rotary machine which includes a rotor assembly having a rotatable rotor shaft is disclosed. The seal assembly may comprise a spacer, a seal plate, a ring seal, and a ring seal midplate. The spacer, the seal plate, and the ring seal midplate may be rotatable with the shaft and extend outwardly from the shaft. The ring seal is free and provides a seal for a bearing compartment of the rotary machine. The ring seal midplate is not attached to the spacer or the seal plate during a hardface process which is applied to any component of the seal assembly. The ring seal midplate may be longitudinally located between the spacer and the seal plate and be radially spaced between the ring seal and the shaft.

Abstract: The present invention refers to a seal ring for a mechanical seal, comprising a base body (2), a first layer (3) applied to a first face side (2a) of a base body (2), and a second layer (4) applied to a second face side (2b) of the base body (2), wherein at least one of the layers (3) is configured as a slide surface of the seal ring. Furthermore, the present invention refers to a method for producing such a seal ring.

Abstract: A drill tool includes a bit body, at least one bearing shaft extending from the bit body and a cone mounted for rotation on the bearing shaft. A mechanical seal is disposed between the bearing shaft and the cone in a seal gland. The mechanical seal includes a rigid seal ring having a dynamic sealing surface with the cone and another non-sealing surface exposed to an aperture in the seal gland. The mechanical seal further includes at least one cooling channel formed in the another non-sealing surface of the rigid seal ring, the cooling channel having an open end in fluid communication with the aperture in the seal gland.

Abstract: A seal assembly for a rotary machine which includes a rotor assembly having a rotatable rotor shaft is disclosed. The seal assembly may comprise a spacer, a seal plate, a ring seal, and a ring seal midplate. The spacer, the seal plate, and the ring seal midplate may be rotatable with the shaft and extend outwardly from the shaft. The ring seal is free and provides a seal for a bearing compartment of the rotary machine. The ring seal midplate is not attached to the spacer or the seal plate during a hardface process which is applied to any component of the seal assembly. The ring seal midplate may be longitudinally located between the spacer and the seal plate and be radially spaced between the ring seal and the shaft.

Abstract: The invention relates to a high-temperature seal (1) with a sealing ring (5) and a counter-ring (6), characterized by the sealing ring (5) and counter-ring (6) being made of metal. As a result, good contact is achieved with good sealing effect, also at high temperatures. It is an advantage if the sealing ring (5) is made of a high-grade steel and/or the counter-ring (6) is made of a CuNi alloy.

Abstract: A flexible edge seal is provided for a vacuum insulating glazing unit having a first glass pane and a second glass pane spaced-apart from the first. The edge seal comprises a seal member formed of a hermetically bondable material and having a first end, a second end and a center section disposed therebetween. The first end is hermetically bondable to a first glass pane. The second end is hermetically bondable to a second glass pane. The center section comprises a plurality of convolutes.

Abstract: The present invention discloses a mating ring, a primary ring, and associated mechanical seal having superior heat transfer and wear characteristics. According to an exemplary embodiment of the present invention, one or more dimples are formed onto the cylindrical outer surface of a mating ring sidewall and/or a primary ring sidewall. A stationary mating ring for a mechanical seal assembly is disclosed. Such a mating ring comprises an annular body having a central axis and a sealing face, wherein a plurality of dimples are formed into the outer circumferential surface of the annular body such that the exposed circumferential surface area of the annular body is increased. The texture added to the sidewall of the mating ring yields superior heat transfer and wear characteristics.

Abstract: A flexible edge seal for a vacuum insulating glazing unit. The flexible edge seal comprises an elongate first edge seal portion having a substantially constant first cross-section and including a bonding flange at one end, a weld surface at the other end and a first center portion therebetween. An elongate second edge seal portion has a substantially constant second cross-section and includes a bonding flange at one end, a weld surface at the other end and a second center portion therebetween. Each bonding flange includes a substantially flat portion adapted for hermetic bonding to a surface of a different one of a pair of glass panes. The weld surfaces are hermetically joined to one another forming a hermetic seal therebetween. At least one of the first center portion and the second center portion has a convolute cross-section and is asymmetrical to the other center portion.

Abstract: A method of refurbishing a seal land on a transition piece of a turbomachine includes applying a wear strip to a wall surface of the seal land, and covering the wear strip with a slot protector.

Abstract: Mechanical face seal rings having a metallurgically bonded wear-resistant coating on the wear surfaces thereof and methods for forming such coated components is taught herein. The face seal rings, which can be formed of a relatively inexpensive base metal or alloy, have a hard metal alloy slurry disposed on the wear surfaces and then fused to form a metallurgical bond with the iron-based alloy. The wear-resistant coating comprises a fused, metal alloy comprising at least 60% iron, cobalt, nickel, or alloys thereof.

Abstract: A compliant foil seal comprises a bottom foil configured to be located circumferentially around at least a portion of a rotor, and one or more upper foils configured to cooperate with a stator to position the bottom foil to compliantly face the rotor and be located between the stator and the rotor. A compliant foil seal assembly and a rotary machine are also presented.

Abstract: A seal, comprising a sealing element and an L-shaped support body that has an annular element and a disc-shaped flange, wherein the flange has an end face on the side facing away from the element, and wherein the sealing element is located on the end face.

Abstract: Process for producing sliding and/or mating rings which can be used for a sliding-ring seal, by manufacturing sliding and/or mating rings by casting from a grey cast iron material with a high thermal conductivity, by machining at least in the subsequent sealing zone and finally by laser-hardening the surface of the respective sealing zone. It is preferable to use a grey iron having the composition (%) C: 3.4-3.9, Si: 2.2-3.2, Mn: 0.5-1, Cr: 0.1-0.4, V: max, 0.15, Cu: 0.1-0.7, P: 0.3-0.6, S: max. 0.13, remainder Fe and inevitable impurities.

Abstract: A device and method for dynamically sealing between rotatable members such as a rolling cone of a rock bit. The assembly includes a seal ring having a facing surface of a relatively hard material, such as hardened steel or tungsten carbide, and a second seal ring of a softer material, the softer material being harder, however, than typical elastomers. Suitable materials for the relatively soft seal ring include tin, copper, aluminum, magnesium, lead and alloys thereof, as well as non-metallic materials such as nylon-zytel, acetal, and polypropylene. The relatively soft seal ring may be affixed to a third seal ring or maybe affixed directly to the cone steel, for example. The seal assembly provides potential for longer life relative to elastomeric seals and requires less axial space along the journal surfaces than certain conventional metal seal assemblies.

Abstract: Nut that screws together with pinion gear, and bearing that is arranged on the inner circumferential side of the nut, are provided on the front of a spinning-reel rotor. Pressing member is mounted on the front faces of the nut and bearing, such that it abuts on outer race of bearing. Pressing member is installed so as to be rotatable with respect to spool shaft, which is a rod element. Pressing member is water-repellency treated over all its surfaces, including the face that forms a clearance with spool shaft. The present invention prevents invasion of water droplets into rotatory-component clearances in a water-sealing component assembly composed of a relatively rotatable plurality of components, while sustaining rotational efficiency of the rotatory components.

Abstract: According to a preferred embodiment, a mechanical face seal assembly comprises four generally ring-shaped members and plural spring devices. The first ring-shaped member is directly fastened (e.g., bolted) to the flanged structural section located at the end of the shaft sleeve. The first and second ring-shaped members are coaxially aligned and rotatively communicative at respective radial surfaces. The first ring-shaped member is made of a metal (or ceramic) matrix composite material. The second ring-shaped member is made of a polymer matrix composite material. The second and third ring-shaped members are mated via radial openings (in the second ring-shaped member) and corresponding radial projections (in the third ring-shaped member). The third ring-shaped member has axial projections and is thereby directly fastened (e.g., bolted) to the fourth ring-shaped member, which clampingly secures the third ring-shaped member with respect to the shaft.

Abstract: To provide a corrosion-resisting and wear resisting alloy including cobalt, nickel or iron as a base used for a sliding part or a valve seat for a machine, and restraining erosion and corrosion caused by eutectic carbide constituting the alloy in an atmosphere with dissolved oxygen.

Abstract: A seal assembly having a first seal ring of a generally annular shape and defining radial and circumferential directions, and a second seal ring positioned in facing relation to the first seal ring. One of the first seal ring and the second seal ring includes a plurality of hydropads. Each hydropad has an inner edge oriented substantially circumferentially, an outer edge oriented substantially circumferentially and spaced radially outward from the inner edge, a leading edge interconnecting the inner edge with the outer edge, and a trailing edge interconnecting the inner edge with the outer edge. Both the leading edge and the trailing edge are substantially straight and are positioned at the same angle relative to a radial axis passing through a mid-point of each edge, respectively.

Abstract: The present invention is a self adjusting, volume balanced, single energizer rigid face seal for rolling cutter drill bits with floating journal bearings. Volume balancing is accomplished by utilizing a floating static seal between the rigid face seal ring and the bearing shaft. This floating static seal ring is moved axially within a annular groove by the volume pulses caused by the axial play of the cutter when in operation. At one end of the annular groove the geometry of the rigid seal ring and bearing shaft are set such that the seal assembly achieves volume balance when the bearing is running on its OD. If the bearing is running on its OD, the floating static seal will move from where ever it is in the annular groove by the volume pulses until it reaches the balance volume position.

Abstract: A method for designing bearings, of improved performance, the load-bearing surfaces of which feature micropores about 2 to 10 microns deep and, preferably, aspect ratios on the order of 7 to 20. The hydrodynamic pressure distribution of a suite of bearing surfaces with different micropore geometries and densities is modeled numerically. The load-bearing surfaces of the bearings are fabricated with micropores having the optimal density and geometry determined by the numerical modeling. Conical micropores may be created by single laser pulses, with the pore size and shape controlled by controlling the laser beam profile, the laser beam power, and the optical parameters of the focusing system.

Abstract: In a slide ring seal assembly having slide rings comprised of a casting material for running gears of track-laying vehicles and construction machinery, the improvement being slide rings composed of a gray cast iron alloy having a pearlitic matrix structure having lamellar separation of graphite therein, having a hardness value of at least 110 HRB, and being composed of:2.99 weight percent of carbon;4.61 weight percent of silicon;0.77 weight percent of manganese;0.53 weight percent of phosphorus;0.039 weight percent of sulfur;1.7 weight percent of chromium;0.81 weight percent of vanadium;1.86 weight percent of copper; andiron as remainder.