| ABB Turbo Systems AG Patent applications |
| Patent application number | Title | Published |
|---|
| 20120128479 | DIFFUSOR - The guide device for the diffusor at the compressor impeller outlet of a radial compressor has guide blades with stepped inlet edges. The step is implemented by setting back the hub-side inlet edge. This meridional stepping divides the guide blades into two component blades, of which the first component blade is made longer than the second component blade. The set-back of the inlet edge of the hub-side component blade and the associated superposition of the noise fields which are produced on the front and rear inlet edge of the diffusor leads to improvement of the acoustic properties of the compressor. | 05-24-2012 |
| 20110318164 | EXHAUST GAS TURBOCHARGER - The means of sealing the compressor wheel with respect to the bearing housing includes an annular sealing element which forms a sealing boundary face with a shaft edge and to which a spring force is applied in the direction of the shaft edge. The external spring force neither compensates or amplifies the pressure forces acting on the sealing element, irrespective of the direction of the difference in pressure. As a result, the sealing of the oil space in the bearing housing of the exhaust gas turbocharger with respect to the shaft is not influenced, or is influenced only to a small degree, by the pressure fluctuations in the wheel back space of the compressor. | 12-29-2011 |
| 20110250067 | SHAFT SEAL - A shaft seal of the rotating wheel shaft of a turbomachine includes a rotating wheel-side seal and a bearing-side seal between the bearing housing and the shaft. An oil outlet chamber is arranged between the rotating wheel-side seal and the bearing-side seal. The oil outlet chamber is delimited by a third seal between the bearing housing and the shaft, and a gas discharge chamber is arranged between the third seal and the rotating wheel-side seal. The construction is actively cooled by means of at least one splash oil bore in the region of the oil drain channel, as a result of which coking of the shaft seal can be prevented. The third seal separates the oil issuing from the oil outlet chamber from the gas issuing from the gas discharge chamber. | 10-13-2011 |
| 20110223010 | DEVICE FOR SEALING A BEARING HOUSING OF AN EXHAUST GAS TURBOCHARGER - A device for sealing a bearing housing, which holds lubricating oil, from which a rotor supported inside the housing of an exhaust gas turbocharger is guided into a compressor housing, loadable by a mass flow of a charger. The device includes a fixed partition with a wall extension, a sealing disk fastened on a shaft of the rotor, a separating gap arranged between the sealing disk and the wall extension, and a drip device connected to an oil-collecting channel and directs lubricating oil collected in the oil-collecting channel into an oil drain by gravity. The drip device includes a drain-off surface for lubricating oil, which has a large axial distance from a rotating sealing disk which delimits the separating gap. Lubricating oil which can penetrate into the separating gap is guided into an oil drain of the bearing housing without interacting with the sealing disk. | 09-15-2011 |
| 20110162359 | DEVICE FOR SEALING A BEARING HOUSING OF AN EXHAUST-GAS TURBOCHARGER - The device serves for sealing a bearing housing of an exhaust-gas turbocharger, from which a rotor is led into a chamber of the turbocharger subjected to a mass flow. The device includes a sealing ring arranged in a groove of the rotor, a seat, arranged on the bearing housing and on which a pre-stressed sealing ring is secured by an outward-facing circumferential surface, and a radially extending separation gap, which leads annularly around the axis of rotation of the rotor and is defined by two superimposed sliding surfaces, the first of which is arranged on a first face of the sealing ring and the second of which is arranged on a first flank of the groove. In order to reduce a heat input into the sealing ring caused by lapping of the sealing ring during operation of the exhaust-gas turbocharger, a depression annularly around the axis is formed into the second flank of the groove. The depression is defined radially outwards by an annular body formed into the rotor. The annular body forms a portion of an external face of the rotor. The annular body includes a radially oriented annular edge, which adjoins the external face and which serves to reduce the size of a lapping face, which is produced as the sealing ring strikes against the second groove flank. | 07-07-2011 |
| 20100278651 | GUIDE DEVICE - The fastening for an attachment of a guide device to a gas outlet housing is positioned in a region radially outside guide blades. In this way, a circumferential position of the guide blades may be freely selected within predefined angles. Collisions are avoided between the guide blades and fasteners. | 11-04-2010 |
| 20100202875 | COMPRESSOR-SIDE SHAFT SEAL OF AN EXHAUST-GAS TURBOCHARGER - The piston ring sealing points of a sealing apparatus between the rotor and the housing of a continuous-flow machine each have a piston ring, a cylindrical contact surface, which is directed radially inward, on the housing, as well as an axial stop on the rotor. In this case, the piston ring of the outer piston ring sealing point has a larger external radius and a smaller internal radius than the piston ring of the inner piston ring sealing point. At the same time, the outer piston ring sealing point has a smaller internal radius than the inner piston ring sealing point. Because of the V-shaped arrangement concept, there is no need for a steel ring, shrunk onto the rotor, between the piston ring sealing points. | 08-12-2010 |
| 20100192570 | BURSTING PROTECTION - A compressor casing includes a casing insert with a flexible element in the force flux between the insert wall contour and the outer compressor casing. The flexible element is assembled from a support ring and ribs, wherein the ribs axially in front of the support ring and the ribs axially behind the support ring are arranged in an offset manner in relation to each other. Due to the arrangement of the ribs in an offset manner, the axial force flux between the insert wall contour and the outer compressor casing is deflected twice, and an axially compliant flexible construction is achieved. | 08-05-2010 |
| 20100150709 | DIFFUSER FOR CENTRIFUGAL COMPRESSOR - A discharge region of a centrifugal compressor is provided. A scroll casing is asymmetrically formed in a circumferential direction and configured to be positioned in different angular positions in the circumferential direction. A vaned diffuser is configured to be positioned in different angular positions in the circumferential direction. The vaned diffuser includes a plurality of guide elements configured to be arranged in a distributed manner in the circumferential direction. Means are provided for positioning the vaned diffuser with regard to an angular position of the asymmetrically formed scroll casing. An angular spacing of two guide elements which are arranged adjacently to each other differs from an angular spacing of two other guide elements which are arranged adjacently to each other. By varying the angular spacings between two adjacent guide vanes of a diffuser along the circumference, the resonance vibration of the compressor can be reduced. | 06-17-2010 |
| 20100143111 | COMPRESSOR STABILIZER - An annular circulation chamber is arranged in an interior of a compressor housing, which circulation chamber radially surrounds a main flow duct and extends from an intake region to an encircling circulation opening in a region of rotor blades of the compressor wheel. Between the circulation openings, the circulation chamber is delimited from the main flow duct by an annular contoured wall. The contoured wall is connected to the inner compressor housing by plural struts which are spaced apart from one another to different extents in the circumferential direction. As a result of the irregular distribution of the struts in the circumferential direction, generation of undesired vibration excitations can be reduced and/or eliminated. | 06-10-2010 |
| 20090185897 | PARTICLE VIBRATION DAMPER - Numerous cavities exist in a turbocharger for reasons of construction. If such cavities are filled with particles, inexpensive particle vibration dampers can be realized. Moreover, advantages with regard to additional containment security result in the case of possible bursting of the compressor wheel, and also with regard to noise suppression. | 07-23-2009 |
| 20080260521 | Sealing arrangement - A sealing assembly comprises a bore in a housing, a plurality of seal rings and a shaft. The bore comprises a plurality of seats disposed at different seat radius for the seal rings. The bore comprises for each pair of adjacent seats axially inward of an inner end of the outward seat and proximate to the inward seat a chamfer extending radially inwardly over an inward axial distance. The chamfer between each pair of seats allows for the radial contraction of the seal rings upon assembly. | 10-23-2008 |
| 20080210264 | Turbine Cleaning - Depending on the actual operating situation and the composition of the fuels used for driving the internal combustion engine, contamination of the moving blades, of the guide device and of the turbine casing parts occurs sooner or later in the exhaust gas turbine. According to the invention, a small quantity of cleaning fluid is fed continuously or cyclically into the exhaust gas flow of an exhaust gas turbine and is directed onto the components to be cleaned. The small quantity of cleaning fluid can be fed in with unchanged operation of the internal combustion engine, such that the exhaust gas turbine can be cleaned or kept clean within the entire operating range of the internal combustion engine. Fluctuations in the power output of the internal combustion engine on account of requisite cleaning of the exhaust gas turbine therefore do not occur. Furthermore, the formation of thermostress cracks in the critical turbine casing parts is largely avoided. | 09-04-2008 |
