Abstract:
Ein Verfahren zur Montage von Rotorblättern an einer Rotornabe, die mit einer Gondel einer Windenergieanlage verbunden ist, beinhaltet die Schritte: Drehen der Rotornabe in eine vorgegebene erste Position, anbringen eines Rotorblattes (21), drehen der Rotornabe mit Hilfe des Rotorblattes (21) in eine vorgegebene zweite Position und montieren eines zweiten Rotorblattes (22), wobei die Drehung der Rotornabe in Richtung der Schwerkraftwirkung des bereits montierten ersten Rotorblattes (21) erfolgt. Hierdurch kann bei der Montage von Rotorblättern an Windenergieanlagen mit einer relativ grossen Nabenhöhe auch ein Kran verwendet werden, der auch zur Montage der Rotornabe selbst bzw. der Gondel ausreicht. Ferner ist ein zu montierendes Rotorblatt für eine Windenergieanlage gezeigt, wobei das Rotorblatt wenigstens ein Durchgangsloch aufweist.
Abstract:
An impeller includes a shell having a plurality of blades. The shell may also define a cavity. The impeller may further include a backplate that engages at least a portion of the shell. The backplate can include a post which can be coupled to the impeller through a fastener such as a threaded nut. The backplate can be thereafter clamped to the impeller shell. Seals can be provided in the impeller, such as in the backplate. The backplate and impeller shell can be piloted onto each other. In some forms splines can be used to secure the backplate to the impeller shell.
Abstract:
The described embodiments relate generally to optimizing airflow in a computer system. By modifying the external surface of centrifugal cooling fan enclosures the pressure drop associated with airflow moving around the enclosures can be reduced. This is generally accomplished by rounding off hard edges from the outside of the cooling fan enclosure as well as forming cover surfaces rather than simply using flat cover surfaces. In some cases this can also involve modifying the shape of the fan inlet, or even contouring the shape of the cooling fan blades to allow air to flow more easily through the computer enclosure.
Abstract:
Method for manufacturing a composite material impeller of a centrifugal compressor or blower, said impeller being mounted directly on the shaft of an electric motor. The composite material impeller is made using an RTM process, wherein the RTM mold has a core and accurately trimmed fabrics placed therein and forming a structure in such a manner that the fabric layers, or preforms, are pulled onto the core thus achieving a maximally optimized use of materials in the structure.
Abstract:
A method and apparatus for solar attic fan with air flow guide have been disclosed. In one version a solar array provides energy for a fan having an air flow guide within a shroud thereby decreasing back pressure and increasing air flow.
Abstract:
Method and impeller for a turbo-machine. The impeller includes a metallic base (1502) having a central hole, a back surface (1502b) and a front surface (1502a) opposite to the back surface (1502b); plural blades (1504, 1506) extending on the front surface (1502a) of the metallic base (1502); a composite shroud (1508) attached to the plural blades (1504, 1506) such that plural closed paths or vanes are formed by the front surface (1502a) of the metallic base (1502), the plural blades (1504, 1506) and the composite shroud (1508); and connecting means (1510, 1606, 1706, 1806, 1906, 2302, 2410, 2608, 2612, 3002, 3010, 3402, 3510) configured to attach the composite shroud (1508) to the metallic base (1502) or the plural blades (1504, 1506).
Abstract:
An impeller (362) includes a top shroud (390), a bottom shroud (392), and a plurality of vanes (388) extending from the top shroud (390) to the bottom shroud (392). The top and bottom shrouds (390, 392) are generally planar, and a lower edge (388.3) of each vane (388) tapers from an outer edge of the bottom shroud (392) to a transverse tip edge (398) thereof.
Abstract:
The invention relates to a method for mounting rotor blades on a rotor hub, which is connected to a nacelle of a wind turbine. Said method comprises the following steps: rotation of the rotor hub into a predefined first position; mounting of a rotor blade (21); rotation of the rotor hub into a predefined second position with the aid of the mounted rotor blade (21) and mounting of a second rotor blade (22), whereby the rotor hub is rotated in the direction of the gravitational force of the first rotor blade (21) that has already been mounted. A crane, which is sufficient for mounting the rotor hub itself or the nacelle, can also be used to mount rotor blades on wind turbines with a relatively high hub. The invention also relates to a rotor blade that is to be mounted on a wind turbine, said rotor blade having at least one bore.