 Grooved pumping seal |
| Thus, it is an object of the present invention to create an improved seal for a hydrodynamic ... |
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| Both ends open fluid dynamic bearing having a journal in combination with a conical bearing |
| Thus, it is an object of the present invention to create an improved hydrodynamic fluid bearing ... |
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| Motor including hydrodynamic bearings with pair of thrust plates |
| An object of the present invention is to increase the usable life span of hydrodynamic-bearing-... |
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| In-hub spindle motor with separate fluid dynamic bearings |
| Thus, it is an object of the present invention to create an improved hydrodynamic bearing which is ... |
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| Damper support assembly for a supercritical drive shaft |
| What is claimed is: 1. A support system for a rotating shaft, comprising: a fixed bracket; a ... |
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| Miniaturized fan for printed circuit boards |
| In accordance with the present invention, the above noted problems of the prior art are minimized ... |
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| Miniature fan assembly for outputting air in a certain direction |
| It is an object of the present invention to provide a miniature fan assembly which may output air ... |
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| Flat resistors for automotive blower motor speed control or other service |
| One object of the present invention is to provide a new and improved flat package resistor unit ... |
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| Miniature heat dissipating fans with minimized thickness |
| It is a primary object of the present invention to provide an improved miniature heat dissipating ... |
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Machine device having superconducting winding and thermosiphon cooling of winding
| Details |
Inventors: Frank, Michael; Kuhn, Adolf; van Hasselt, Peter;
Assignee: Siemens Aktiengesellschaft (Munich, DE)
Primary Examiner: Schuberg; Darren
Assistant Examiner: Pham; Leda T.
Attorney, Agent or Firm: Staas & Halsey LLP
A superconducting device has a rotor rotatable about an axis of rotation and a superconducting winding in a heat conducting winding carrier. The winding carrier has a central cooling agent cavity with a lateral cavity leading out of the winding carrier connected thereto. A cold head associated with a cooling unit is connected to a condenser unit which condenses the cooling agent. A fixed heat tube guiding the cooling agent is coupled to the condenser unit, protruding axially into the co-rotating lateral cavity and is sealed in relation thereto. |
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DETAILED DESCRIPTION An aspect of the present invention is to design a machine device having the features mentioned initially such that at least the accumulation of refrigerant, as mentioned, in the central rotor cavity on the refrigerant entry end is prevented in the standby state of the machine.
This aspect is accomplished by rotating the rotor in the non-operating state, where the central rotor cavity for the refrigerant has at least one helical or spiral feed path running from the entry end of the refrigerant into the rotor cavity axially toward the opposite end.
The term non-operating state is understood in this case to mean any state of the machine in which a desired rotational speed of the rotor is not provided and, in particular, a standby operating mode/disconnected mode is provided.
The advantages associated with this refinement of the machine device are, in particular, that, even in the case of its machine having a skew in the unfavorable direction depicted, the refrigerant still remains in the entire central interior of the rotor.
This is because, when the machine is in the non-operating state (or standby mode), the rotor rotates slowly (so-called "turn") with the aid of a rotation mechanism.
Owing to the helical or spiral design of the refrigerant feed path, in this case the refrigerant is fed from the refrigerant entry end to the opposite end and is thus kept in the entire interior of the rotor cavity.
This also makes it possible to control the standby losses, thus making standby operation possible.
One precondition for classifying the machine as a main generator is thus fulfilled.
Further, the device may have a hollow-cylindrical, central rotor cavity having a single- or multi-start feed screw, in particular in the form of an Archimedes screw.
Such a screw can easily be installed in the rotor cavity.
Instead, the hollow-cylindrical, central rotor cavity may also have a groove-like feed path on its radially outer inner wall.
When the rotor is rotating slowly in the non-operating state, in this case the refrigerant flows in the groove toward the axially opposite side
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Generators or Motors 
