Abstract: A micro gas turbine equipped with a valve mechanism by means of which the operation of the micro gas turbine can be influenced and optimized, particularly by regulating a supply of hot gas from the cabinet and/or the exhaust of the micro gas turbine to an inlet side of the compressor. When the temperature of ambient air is relatively low, thermal output and thermal efficiency of a micro gas turbine decrease. The present micro gas turbine compensates for the loss of thermal efficiency.

Abstract: A heat exchanger suitable to be used as a recuperator in a micro gas turbine including a stack of cells. Each of the cells includes a pair of mutually spaced-apart plates and layers including heat exchange elements arranged at the outer surfaces of the plates and between the plates. Each of the layers including heat exchange elements can include at least one discrete spatial component incorporating a number of elements. Both a supply header and a discharge header of the heat exchanger can be made of only two components at the position of the stack of cells. Compensating for heat expansion effects can be via a bellows-shaped pipe portion of a supply conduit.

Abstract: A heat exchanger suitable to be used as a recuperator in a micro gas turbine including a stack of cells. Each of the cells includes a pair of mutually spaced-apart plates and layers including heat exchange elements arranged at the outer surfaces of the plates and between the plates. Each of the layers including heat exchange elements can include at least one discrete spatial component incorporating a number of elements. Both a supply header and a discharge header of the heat exchanger can be made of only two components at the position of the stack of cells. Compensating for heat expansion effects can be via a bellows-shaped pipe portion of a supply conduit.

Abstract: A micro gas turbine equipped with a valve mechanism by means of which the operation of the micro gas turbine can be influenced and optimized, particularly by regulating a supply of hot gas from the cabinet and/or the exhaust of the micro gas turbine to an inlet side of the compressor. When the temperature of ambient air is relatively low, thermal output and thermal efficiency of a micro gas turbine decrease. The present micro gas turbine compensates for the loss of thermal efficiency.

Abstract: A shaft joint has an inverse conical stopper. The joint is a combination of interconnected shafts, with one shaft being inserted into the other. The interface between the two shafts can be of any type: press-fit, thermally shrank, threaded, etc. Besides, the shaft-to-shaft interface can be also either bonded or non-bonded.

Abstract: A shaft joint has an inverse conical stopper. The joint is a combination of interconnected shafts, with one shaft being inserted into the other. The interface between the two shafts can be of any type: press-fit, thermally shrank, threaded, etc. Besides, the shaft-to-shaft interface can be also either bonded or non-bonded.

Abstract: A method for manufacturing an inexpensive micro gas turbine has an existing compressor-turbine unit divided into two separate parts being a compressor and a turbine. The compressor and turbine shafts are joined. Two existing bearing units are taken, wherein one of them may belong to the existing compressor-turbine unit. The rotor of an existing generator is mounted on the joined shaft. A generator housing is manufactured and connected to the bearing units. The stator of an existing generator is mounted into the generator housing. Energy input into the working cycle of the gas turbine can be implemented by adding either an internal burner or external burner with a heat exchanger. By using inexpensive and often mass produced off-the-shelf components, a cost effective micro gas turbine can be derived.

Abstract: This patent presents the invention of a shaft joint with an Inverse Conical Stopper. The joint is a combination of interconnected shafts. The joint is between two shafts. In the joint, one shaft is inserted into the other. The interface between the two shafts can be of any type: press-fit, thermally shrank, threaded, etc. The Inverse Conical Stopper: Prevents swelling of the joint; Enforces concentric alignment of the two shafts; and Pre-stresses the interface. Besides, the shaft-to-shaft interface can be also either bonded or non-bonded. In the former case, the Inverse Conical Stopper also prevents failure of the bond by: Reducing loads on the bond by using the pre-stress to (partly) compensate for the centrifugal load. The Inverse Conical Stopper makes the joint particularly suitable for high centrifugal loads and high rotation speeds.

Abstract: The invention relates to a method for manufacturing an inexpensive micro gas turbine 1. According to this method, an existing compressor-turbine unit is divided into two separate parts being a compressor 3 and a turbine 5. The compressor and turbine shafts are joined. Two existing bearing units (11 and 17) are taken, wherein one of them may belong to the existing compressor-turbine unit. The rotor 25 of an existing generator 7 is mounted on the joined shaft. A generator housing 21 is manufactured and connected to the bearing units. The stator 23 of an existing generator 7 is mounted into the generator housing. Energy input into the working cycle of the gas turbine can be implemented by adding either an internal burner or external burner with a heat exchanger. By using inexpensive and often mass produced off-the-shelf components, a cost effective micro gas turbine can be derived.

Abstract: Belt for use in a continuous variable transmission, comprising an endless carrier for taking op tensile forces, and a plurality of transverse elements moveable in the longitudinal direction along the carrier. The elements are provided with at least one saddle surface for contacting the carrier. The saddle surface defines an ultimate mutual position of the carrier and the elements relative to each other within the belt in radial direction, with a tapered lower element part including a rocking edge and an upper part extending radially beyond the carrier, when the carrier and surface are in mutual contact. Each axial end of the surface is adjoined by a limb extending predominantly in radial outward direction, thereby defining a recess open to the radial outer end of the element allowing free insertion of the carrier in the recess.

Abstract: Belt for a continuous variable transmission, comprises an endless carrier for taking up tensile forces, and a plurality of transverse elements moveable in the longitudinal direction along the carrier. The elements are provided with at least one saddle surface for contacting the carrier. The saddle surface defines an ultimate mutual position of the carrier and the elements relative to each other within the belt in radial direction, with a tapered lower part including a rocking edge and an upper part extending radially above the edge and beyond the carrier, when the carrier and surface are in mutual contact. A thickness of the upper part of a majority of the elements in the longitudinal direction is larger than a largest thickness of the tapered lower part, such that an array of elements pushed against one another within the belt when mutually contacting through their upper parts assumes an arc-like shape.

Abstract: A continuously variable transmission, provided with two adjustable pulleys, each pulley comprising a pair of mutually displaceable essentially frusto-conical pulley sheaves having a radial dimension provided on a pulley shaft, each sheave having a sheave face, whereby the sheave faces of a pulley are mutually oriented at a pulley angle, and with an endless flexible belt for transmitting torque comprising two lateral side faces, which are mutually oriented at a belt angle (alpha) such that the flexible belt tapers radially inwardly and which are intended for interacting with the sheave faces of a pulley under the influence of a clamping force to be exerted on the flexible belt by the sheaves. The belt angle is marginally, but notionally, larger than the pulley angle (beta) of at least one pulley for at least a substantial part of the radial dimension of the pulley sheaves.

Abstract: Belt (3) for use in a continuous variable transmission, comprising an endless carrier (4) for taking op tensile forces within said belt (3), and a plurality of transverse elements (5) provided moveable in the longitudinal direction along said carrier (4), which elements (5) are provided with at least one saddle surface (8) for contacting the carrier (4), which saddle surface (8) defines an ultimate mutual position of the said carrier (4) and the said elements (5) relative to each other within the belt (3) in radial direction, with a tapered lower element part including a rocking edge (9) and with an upper element part (10, 11) extending radially beyond the carrier (4), at least when the carrier (4) and the saddle surface (8) are in mutual contact.

Abstract: Belt (3) for use in a continuous variable transmission, comprising an endless carrier (4) for taking op tensile forces within said belt (3), and a plurality of transverse elements (5) provided moveable in the longitudinal direction along, said carrier (4), which elements (5) are provided with at least one saddle surface (8) for contacting the carrier (4), which saddle surface (8) defines an ultimate mutual position of the said carrier (4) and the said elements (5) relative to each other within the belt (3) in radial direction, with a tapered lower element part including a rocking edge (9) and with an upper element part (10, 11; 14) extending radially above the said rocking edge (9) and beyond the carrier (4), at least when the carrier (4) and the saddle surface (8) are in mutual contact.

Abstract: Belt for use in a continuous variable transmission, including an endless carrier for taking up tensile forces within the belt, and a plurality of transverse elements provided moveable in the longitudinal direction along the carrier, the elements provided with at least one saddle surface for contacting the carrier, the saddle surface defining an ultimate mutual position of the carrier and the elements relative to each other within the belt in a radial direction, with a tapered lower element part including a rocking edge and with an upper element part extending radially above the rocking edge and beyond the carrier, at least when the carrier and the saddle surface are in mutual contact.

Abstract: A continuously variable transmission, provided with two adjustable pulleys, each pulley comprising a pair of mutually displaceable essentially frusto-conical pulley sheaves having a radial dimension provided on a pulley shaft, each sheave having a sheave face, whereby the sheave faces of a pulley are mutually oriented at a pulley angle, and with an endless flexible belt for transmitting torque comprising two lateral side faces, which are mutually oriented at a belt angle ( alpha ) such that the flexible belt tapers radially inwardly and which are intended for interacting with the sheave faces of a pulley under the influence of a clamping force to be exerted on the flexible belt by the sheaves. The belt angle is marginally, but notionally, larger than the pulley angle (beta) of at least one pulley for at least a substantial part of the radial dimension of the pulley sheaves.

Abstract: Belt (3) for use in a continuous variable transmission, comprising an endless carrier (4) for taking op tensile forces within said belt (3), and a plurality of transverse elements (5) provided moveable in the longitudinal direction along said carrier (4), which elements (5) are provided with at least one saddle surface (8) for contacting the carrier (4), which saddle surface (8) defines an ultimate mutual position of the said carrier (4) and the said elements (5) relative to each other within the belt (3) in radial direction, with a tapered lower element part including a rocking edge (9) and with an upper element part (10, 11; 14) extending radially above the said rocking edge (9) and beyond the carrier (4), at least when the carrier (4) and the saddle surface (8) are in mutual contact.

Abstract: Drive belt (10) for a continuously variable transmission, as for use in motor vehicles, having transverse elements (20) and at least one endless carrier. The transverse elements (20) are each provided with a recess (21), which extends between a first and a second main face (22 and 23, respectively) of a transverse element (20), which main faces are oriented transversely to the intended direction of movement (C) of the drive belt (10). The recess (21) offers accommodation for the carrier (30) and at least is bounded by an abutting face (24), intended to come into contact with a main face (30′) of the carrier (30), and a boundary face (25), which is oriented transversely thereto and restricts the freedom of movement of the carrier (30) in the axial direction. The boundary face (25) merges into the first main face (22) and into the second main face (23) via transition edges (27, 27′), characterised in that the radius of curvature (R) of at least one transition edge (27) is less than 0.2 mm.

Abstract: A drive belt for use in a continuously variable transmission includes a plurality of transverse elements carried by at least one endless carrier with at least one endless band, received in a receiving shot provided for the band in the element, the slot allowing relative axial play Pa between the element and the band relative to the predominant longitudinal direction of the belt, wherein the axial play is of a value between 0.2 and 0.95 times the maximum amount of misalignment defined for the belt, indicated in maximum amount of lateral displacement.

Abstract: A drive belt for a continuously variable transmission having belt discs having an at least partially conical contact surface for enclosing a drive belt between pairs of said discs, which drive belt to this end comprises one or more transverse elements provided with converging side faces intended to come into contact with the contact surface of a belt disc and wherein one or more side faces possess a surface which has protuberances providing a profile, which surface has therein contact faces, defined by the protuberances, for coming into contact with the contact surface of a belt disc, wherein the profile is shaped such that on cross-sectioning parallel to the side face concerned, or after wear of the profile at or down to a level which is located at least thirty percent and at most seventy percent of the profile height beneath the initial profile height, the surface area effectively available for coming into contact with the contact surface of a belt disc lies within the range of forty to sixty percent with r