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Torque transmission assembly for superconducting rotating machines

Torque transmission assembly for superconducting rotating machines
IPC classes for russian patent Torque transmission assembly for superconducting rotating machines (RU 2418352):
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FIELD: electricity.

SUBSTANCE: proposed rotor assembly includes superconducting winding assembly located in cryogenic zone of rotor assembly. The above rotor assembly includes torque transmission assembly which according to this invention includes the first and the second pipes which are located with a radial gap outside the assembly of superconducting winding and which pass along longitudinal axis of rotor assembly. Besides, superconducting rotating machine containing such torque transmission assembly is proposed.

EFFECT: improved operational characteristics.

18 cl, 5 dwg, 2 app

 

References to related applications

This patent application claims the priority of patent application U.S. No. 11/533,595, filed September 20, 2006, the contents of which in full is included here by reference.

The incorporation by reference

In this application incorporated by reference the following applications: patent application U.S. No. 09/415,626, filed October 12, 1999, the patent application U.S. No. 09/480,430, filed January 11, 2000, the patent application U.S. No. 09/480,397, filed January 11, 2000; patent application U.S. No. 09/481,483, filed January 11, 2000; patent application U.S. No. 09/481,480, filed January 11, 2000; patent application U.S. No. 09/481,484, filed January 11, 2000, the patent application U.S. No. 09/480,396 filed January 11, 2000, and patent application U.S. No. 09/909,412, filed on July 19, 2001

Background of the invention

The invention relates to the construction and operation of superconducting rotating machines and, in particular, to assemblies torque transfer in superconducting rotating machines.

Superconducting electric machines have been developed since the early 1960-ies. The use of superconducting windings in these machines has led to a significant increase in the magnetomotive force generated by the windings, and to increase the density of magnetic flux in the machine. However, for proper operation of the superconducting coils require cryogenic those is the temperature. Thus, were developed superconducting motors and generators, including mechanisms for transmission of torque between the rotor Assembly and output shaft with simultaneous limitation of heat transfer in cryogenic area of the machine.

The invention

The invention relates to assemblies of the rotor, and rotating machines (e.g., motor or generator), with such Assembly of the rotor. The rotor Assembly is of a type that is configured to rotate in the Assembly of a stator of a rotating machine and having a shaft located in a non-cryogenic zone of the rotor Assembly.

According to one aspect of the invention, the rotor Assembly includes the Assembly of the superconducting winding, located in the cryogenic area of the rotor Assembly. During operation, the Assembly of the superconducting coil generates a magnetic flux penetrating the stator Assembly. The rotor Assembly also includes an Assembly torque transfer, which includes two tubes, which are arranged with a radial gap outside the Assembly of the superconducting winding and along the longitudinal axis of the rotor Assembly.

Embodiments of this aspect of the invention may include one or more of the following characteristics. Assembly torque transmission can be mechanically connected with the Assembly of the superconducting what bmode and can be carried out between non-cryogenic zone, cryogenically area of the rotor Assembly. The rotor Assembly may include a flange, and the Assembly torque is transmitted axially extends from the flange and the section of the Assembly of the superconducting winding. The lengths of the two pipes can be sufficient to provide thermal insulation Assembly of the superconducting winding. Assembly torque transmission may include a ring for mechanical connection with the Assembly of the superconducting winding. For example, the first ring may mechanically connect the first pipe with the Assembly of the superconducting winding, and the second ring may mechanically connect the second pipe with the Assembly of the superconducting winding. The flanges can also be mechanically bonded to the tubes. For example, one tube may be mechanically connected with one flange and walk through the land Assembly of the superconducting winding, and another pipe can be mechanically connected with the other flange and pass on to another site Assembly of the superconducting winding. The length of the pipe can be the same or different. The gap between the pipe may be sufficient to provide substantial insulation Assembly of the superconducting winding. The gap may also be sufficient to provide support for the Assembly of the superconducting winding. Pipes can be made of various materials, such as thermally conductive materials (e.g., Inconel). The rotor Assembly also may include the spokes, each spoke can mechanically locking the Assembly of the superconducting winding to the shaft. One of the tubes can be mechanically connected with a ring welded connection. The Assembly of the superconducting winding may include a high-temperature superconductor. The Assembly of the superconducting winding may also include supporting tube. The Assembly of the rotor can be used in a relatively high-speed applications. For example, you can use at speeds of at least 3000 rpm/min

According to one aspect of the invention a rotating machine includes a shaft located in a non-cryogenic zone of the rotating machine, and the stator Assembly. Rotating machine also includes an Assembly of a rotor surrounded by the stator Assembly. The rotor Assembly includes the Assembly of the superconducting winding, located in the cryogenic area of the rotor Assembly. During operation, the Assembly of the superconducting coil generates a magnetic flux penetrating the stator Assembly. The rotor Assembly also includes an Assembly torque transfer, which includes two tubes, which are arranged with a radial gap outside the Assembly of the superconducting winding and along the longitudinal axis of the rotor Assembly.

Embodiments of this aspect of the invention may include one or more of the following PR the characters. The rotor Assembly may include a flange, and therefore the Assembly torque is transmitted axially extends from the flange and the section of the Assembly of the superconducting winding. The length of the pipe may be sufficient to provide substantial insulation Assembly of the superconducting winding. The gap between the pipe may also provide thermal insulation Assembly of the superconducting winding. The gap between the pipe may also be sufficient to provide support for the Assembly of the superconducting winding. Assembly torque transmission may include one ring for mechanical connection of the first pipe with the Assembly of the superconducting winding and the other ring for mechanical connection of the second pipe with the Assembly of the superconducting winding. The first tube can be mechanically connected with the first flange and axially pass through the Assembly section of the superconducting coil, and the second tube can be mechanically connected with the second flange and axially pass through another portion of the Assembly of the superconducting winding. Pipes may contain one or more types of thermally conductive materials (e.g., Inconel) and composite materials.

The details of one or more embodiments of the invention shown in the accompanying drawings and the following description. Other characteristics, objectives and advantages of the invention will become evident is from the description and drawings, and from the claims.

Brief description of drawings

Figure 1 is a perspective view in section of the rotor Assembly.

Figa enlarged view in terms of plot, shown in figure 1.

Figure 2 - two-dimensional view in section of a variant of implementation of the rotor Assembly.

Figure 3 - two-dimensional view in section of another embodiment of the assembled rotor.

Figa configuration of the spokes of the rotor Assembly shown in Figure 3.

Detailed description

Figures 1 and 1A shows the Assembly 10 of the superconducting rotor of the synchronous machine. In this view, in perspective, a portion of the electromagnetic screen 12 removed to reveal the internal components of the Assembly 10 of the rotor. For example, shaft 14, which runs along the longitudinal axis 16 of the rotor Assembly 10. Superconducting coil 18 during operation, generates a magnetic flux penetrating the stator Assembly (not shown). In some examples, the superconducting coil may have one or more topologies configuration to create an electrical poles (for example, a six-pole topology). Superconducting coil 18 may have a shape (e.g. oval) for efficient generation of the magnetic flux, as provided (in conjunction with other components of the structure) in the patent application U.S. No. 09/359,497, which is incorporated here by reference. The Assembly 10 of the rotor also includes about otcu excitation (not shown), examples of which are described in more detail in the patent application U.S. No. 09/480,430, which is incorporated here by reference.

The Assembly 10 of the rotor includes a control winding pipe 20, which is maintained at cryogenic temperatures and are made of high-strength and ductile material (such as stainless steel, Inconel, Nickel, steel grades 9, Nickel steel grade 12 and so on). The creation of the support pipe 20 winding of Nickel steel grade 9 or Nickel steel grade 12 has the advantage, due to its ferromagnetic properties, which help to strengthen the magnetic field in the flow path penetrating the stator Assembly. Cryogenic cooler (not shown), external to the Assembly 10 of the rotor provides a coolant, such as helium, the Assembly of the rotor. As will be described in more detail below, the Assembly 10 of the rotor and its components have characteristics that allow to improve the overall performance of the generator, especially at relatively high speeds (e.g., speeds above 3000 rpm) under conditions of high or low torque. However, specifications and characteristics of the rotor Assembly 10 can also be used in low-speed implementations, in conditions of high or low torque.

In particular, the Assembly 10 of the rotor includes two tubes 22, 24 torque transmission rotator is s efforts created by the Assembly of the rotor shaft 14. In this configuration, the respective flanges 26, 28 are attached to the pipes 22, 24 torque transmission from the Assembly 10 of the rotor shaft 14. The shaft 14 transmits rotational energy, for example, the propeller, the transmitting system or similar device or system. The shaft 14 is usually made of steel and is not cooled (i.e. remains at ambient temperature). In some examples, the shaft 14 by itself or together with the surrounding casing (not shown) may be made of a ferromagnetic material such as magnetic steel or iron to reduce the magnetic resistance and thus increase the magnitude of the magnetic flux through the flow path penetrating the stator Assembly.

Support pipe winding 20 provides support for the superconducting winding 18, through which the coil retains its shape coil (for example, an oval shape). For relatively high-speed applications superconducting coil 18 is mounted inside the supporting pipe 20 windings. In this case, the support pipe 20 of the winding is located in a radial position farther from the longitudinal axis 16 than the superconducting coil 18. At high speeds the centrifugal forces can repel the coil radially from the axis of rotation. Due to the fact that the superconducting winding 18 is covered with the support pipe 20, winding, essentially stays in place, keeping its shape.

Pipes 22 and 24 torque are radially outside of the support pipe 20 for winding relatively high speed applications Assembly 10 of the rotor. Specified figure 1 is a plot of rotor Assembly 10 is shown in an enlarged view Figa. From Figa can be seen that the tube 22 torque is situated between the supporting tube winding 20 and the electromagnetic screen 12 and runs along the longitudinal axis 16 of the rotor Assembly 10. Although not shown, the pipe 24 torque is approximately the same radial position between the supporting tube winding 20 and the electromagnetic screen 12.

For transmission of rotational effort from the Assembly 10 of the rotor while minimizing heat transfer between the warm and cold components of the pipe end 22 of the torque is mechanically connected (e.g., welded) on its circumference with a flange 26, which passes radially from the shaft 14. Similarly, the flange 28 (shown in Fig.1) at the opposite end of the Assembly 10 of the rotor is connected with the pipe 24 torque. Pipes 22 and 24 of the torque along the longitudinal axis 16, covering the ends of the support pipe 20 of the coil and the superconducting winding 18.

In addition to the transmission of torque and mechanical support of the superconducting winding 18 of the tubes 22, 24 torque also provide insulation between about odoi, at cryogenic temperatures, and the parts of the Assembly 10 of the rotor which is at ambient temperature, for example, the shaft 14. To provide mechanical support and insulation, one or both of the pipes 22, 24 torque can be made of a material of high strength and low thermal conductivity, such as Inconel (for example, Inconel 718), titanium alloy (for example, Ti6A14V, etc. or other similar metallic material. Tubes 22, 24 torque can also be made of composite material or a combination of metal and composite materials to provide structural and thermal properties.

Since the pipes 22, 24 torque produced from high-strength material, the length of the pipe torque along the longitudinal axis 16 can be relatively large even for the operating conditions of the Assembly 10 of the rotor at relatively high speeds. The length of the pipes 22 and 24 torque in combination with their low thermal conductivity reduces heat transfer from the warm components to the cold components (e.g., superconducting winding 18, the support pipe 20 winding), at the same time effectively transmitting torque from the winding shaft 14. As discussed below, the length of the pipe torque can be adjusted to provide the desired support and insulation.

Support pipe 20 obmotchikom to downsize due to maintenance at cryogenic temperatures. For example, the support pipe 20 of the winding can be shortened due to low temperatures. Tubes 22, 24 torque usually have a higher stiffness in shear than the support pipe 20 windings. For example, the dynamic stiffness of the pipes 22, 24 torque can be significantly lower dynamic stiffness of the support pipe 20 windings. Since the pipes 22, 24 torque significantly less flexible pipe torque experiencing less stress. Additionally, the low thermal conductivity of the pipes torque provides a low thermal resistance between the cryogenic area and the area of the ambient temperature of the Assembly 10 of the rotor.

Figure 2 two-dimensional view in section of the Assembly 10 shows the rotor Assembly 30 of the superconducting winding, which is maintained at cryogenic temperatures and includes components such as a superconducting coil 18 and the support pipe 20 windings. Due to the radial symmetry of the rotor Assembly 10 is described here only the upper portion of the Assembly, however, the description also corresponds to the lower portion of the Assembly. The Assembly 10 of the rotor also includes an Assembly 32 of the torque transmission, which includes components, such as two pipes 22, 24 torque, which respectively transmit torque to the shaft 14 through the two flanges 26, 28. The Assembly 32 of the torque transmission provides th the isolation Assembly 30 superconducting winding from sections of the Assembly 10 of the rotor, at ambient temperature.

In this configuration, the respective ends of each of the pipes 22, 24 of torque attached to the rings 34, 36, which are located radially outside of the support pipe 20 windings. For example, one end of the torsion tube 22 is mechanically connected (e.g. welded) with the ring 34, and one end of the tube 24 of the torque associated with the ring 36. Pipe torque separated by a distance along the longitudinal axis 16 of the rotor Assembly 10. Expressed by the distance "X1"the separation of the pipes 22, 24 of the torque depends on the length of pipe, the length of the Assembly 10 of the rotor and the provisions of the rings 34, 36 along the longitudinal axis 16.

In this example, each of the torsion tubes 22, 24 passes through the area of the support pipe 20 windings. For example, tube 22 torque passes through the area of the support pipe 20 of the coil, which has a length "XOL1"and the pipe 24 torque passes through the opposite area of the support pipe winding, indicated by the length "XOL2". Overlapping the supporting tube winding 20, the pipes 22, 24 torque can pass on considerable length without increasing the length of the Assembly 10 of the rotor along the longitudinal axis 16. This would not be possible if the pipes 22, 24 of the torque is parallel (at the same radial distance from the longitudinal axis) of the support tube 20 windings.

With increasing dinitro 22, 24 torque and, thus, reducing separation distances "X1" tension on the Assembly 10, the transmission torque is reduced. Additionally, due to the low thermal conductivity of the pipe material torque with increasing lengths of the heat load due to conduction pipe torque decreases. For example, in Appendix A presents the analysis of the torque Assembly 10 of the rotor shown in figure 2. In this analysis, the separation distance "X1" set to 22.5 inches. From calculations (presented in MathCad programming language developed by Mathsoft Corporation of Needham, MA) in pipes torque, tension is about 53 ksi, and the heat load due to conduction pipe torque is about 39 watts. As described below, by reducing the distance of separation voltage can be reduced together with the heat load. Decreasing the separation distance to zero, you can minimize the stress and heat load. However, at zero separation of the two rings 34, 36 will be placed side by side to form a single point of contact with the supporting tube winding 20, which may reduce the mechanical stability. Therefore, the distance of separation usually has a non-zero value.

In some configurations, the supporting pipe 20 of the exchange rate the weave is made of a metal material, for example, stainless steel or non-metallic material, such as composite material. Similarly, one or both of the rings 34, 36 may be made of a metal material (e.g., Inconel), or composite material, or a combination of metal and composite materials.

Figure 3 shows a two-dimensional view in section of another embodiment of the exercise Assembly 10 of the rotor. In this example, two pipes 22 and 24 torque longer than pipes torque, shown in figure 2. Accordingly, the separation distance "X2" between the two pipes torque is less than the separation distance "X1" figure 2. By reducing the distance of separation between the tubes 22, 24 torque tension in the pipe torque is reduced together with thermal load due to the conductivity of tube torsion. For example, since the stiffness coefficient of each of the torsion tube 22, 24 is less than the stiffness coefficient of the support pipe 20 windings, each pipe torque may be compressed significantly less than the support pipe coil. For example, tube 22 torque may be compressed to half the length, which is compressed support pipe 20 of the winding.

Appendix B presents the analysis of the torque tubes 22, 24 torque for reduced distances the division "X 2"equal to 7.5 inches. The analysis shows that the voltage is about 44 ksi, which is considerably less than the voltage on the tubes of torque, separated by a distance "X1(i.e. 53 ksi). The analysis also shows that the heat load due to conduction pipe is about 33 watts, which is less than the heat load experienced when the separation distance "X1(i.e. 39 watt). Thus, by increasing the lengths of the pipes 22, 24 of the torque and, accordingly, decrease the distance separating the tension in the pipe torque is reduced together with the heat load.

In the illustrative Assembly of the rotor shown in figure 2 and Figure 3, both pipes 22, 24 torque are of equal length, however, in some configurations, pipe torque can have different lengths. In addition, the Assembly 10 of the rotor both pipes 22, 24 torque are located symmetrically about the midpoint of the distance of separation (for example, X1or X2). However, in some configurations, pipe torque can be located asymmetrically relative to the average point distance of separation.

You can provide additional support for the support pipe 20 of the winding, for example, when the Assembly 10 of the rotor part of the generator operating at relatively high speeds. For example, SP is s 38 (shown in Fig.3) can be included in the composition of the Assembly 10 of the rotor to provide additional support for the support pipe 20 of the winding in the radial direction. According Figa spokes 38 can be evenly distributed (for example, with an interval of 45°), however, in some configurations, the spokes may be distributed unevenly. Spokes 38 may also be located to provide support to other components of the Assembly 10 of the rotor. For example, the spokes 38 may be located between the shaft 14 and the pipe 22 torque. Along with the gaps between the spokes you can change the number of spokes depending on the required support. In addition, the spokes 38 can be made of a material of high strength and low thermal conductivity, such as Inconel 718, titanium alloy (for example, Ti6A14V) or composite material to reduce heat transfer between the shaft 14, which is at ambient temperature, and cold components of the Assembly 10 of the rotor.

Other embodiments of meet the scope of the claims. For example, although the rotor Assembly shown in Figure 3, includes one set of spokes 38 connecting the shaft 14 with the supporting tube 20 windings, one or more additional sets of spokes can be placed to provide support at the opposite end of the support pipe winding.

1. The Assembly of the rotor is configured to rotate in the Assembly of a stator of a rotating machine having a shaft located in a non-cryogenic zone with the orcs of the rotor, the rotor Assembly contains
the Assembly of the superconducting winding, located in the cryogenic area of the rotor Assembly, and the Assembly of the superconducting winding, during operation, generates a magnetic flux penetrating the stator Assembly, and
Assembly torque transmission comprising first and second tubes, which are arranged with a radial gap outside the Assembly of the superconducting winding and along the longitudinal axis of the rotor Assembly.

2. The rotor Assembly according to claim 1, in which the Assembly transmit torque mechanically connected with the Assembly of the superconducting winding and passes between non-cryogenic zone, cryogenically area of the rotor Assembly.

3. The rotor Assembly according to claim 1, additionally containing a flange, and the Assembly torque is transmitted axially extends from the flange and the section of the Assembly of the superconducting winding.

4. The rotor Assembly according to claim 1, in which the length of the first and second pipes sufficient to provide substantial insulation Assembly of the superconducting winding.

5. The rotor Assembly according to claim 1, in which the Assembly of the torque transmission includes a ring for mechanical connection with the Assembly of the superconducting winding.

6. The rotor Assembly according to claim 1, in which the Assembly of the torque transmission includes a first ring for mechanical connection of the first pipe with the Assembly of the superconducting winding and the / establishment, which ring for mechanical connection of the second pipe with the Assembly of the superconducting winding.

7. The rotor Assembly according to claim 1, in which the first pipe is mechanically connected with the first flange and axially passes through the Assembly section of the superconducting winding, the second pipe is mechanically connected with the second flange and axially passes through another portion of the Assembly of the superconducting winding.

8. The rotor Assembly according to claim 1, in which the length of the first pipe and the second pipe are different.

9. The rotor Assembly according to claim 1, in which the gap between the first pipe and the second pipe is sufficient to provide substantial insulation Assembly of the superconducting winding.

10. The rotor Assembly according to claim 1, in which the length of the first and second pipes sufficient to provide support for the Assembly of the superconducting winding.

11. The rotor Assembly according to claim 1, in which the first pipe includes a heat-conductive material.

12. The rotor Assembly according to claim 11, in which thermally conductive material includes Inconel.

13. The rotor Assembly according to claim 1, additionally containing a set of spokes, each spoke mechanically radially fixes the Assembly of the superconducting winding on the shaft.

14. The rotor Assembly according to claim 1, in which the first pipe is mechanically connected with the ring by means of a welded connection.

15. The rotor Assembly according to claim 1, in which the Assembly of the superconducting coil includes a high temperature superconductor.

16. The rotor Assembly according to claim 1, in which the Assembly of the superconducting winding and includes a support pipe.

17. The rotor Assembly according to claim 1, configured to rotate with a speed of at least 3000 rpm/min

18. Rotary machine containing a shaft located in a non-cryogenic zone of a rotating machine,
the Assembly of the stator,
the Assembly of the rotor surrounded by a stator Assembly and including
the Assembly of the superconducting winding, located in the cryogenic area
the rotor Assembly, and the Assembly of the superconducting winding, during operation, generates a magnetic flux penetrating the Assembly
stator, and
Assembly torque transmission comprising first and second tubes, which are arranged with a radial gap outside the Assembly of the superconducting winding and along the longitudinal axis of the rotor Assembly.

19. Rotating machine p, in which the rotor Assembly includes a flange, the Assembly torque is transmitted axially extends from the flange and the section of the Assembly of the superconducting winding.

20. Rotating machine p, in which the length of the first and second pipes sufficient to provide substantial insulation Assembly of the superconducting winding.

21. Rotating machine p, in which the gap between the first pipe and the second pipe is sufficient to provide substantial insulation Assembly of the superconducting winding.

22. Rotating machine p, in which the interval between the first TRU is Oh and the second pipe is sufficient to provide support for the Assembly of the superconducting winding.

23. Rotating machine p, in which the Assembly of the torque transmission includes a first ring for mechanical connection of the first pipe with the Assembly of the superconducting winding and the second ring for mechanical connection of the second pipe with the Assembly of the superconducting winding.

24. Rotating machine p, in which the first pipe is mechanically connected with the first flange and axially passes through the Assembly section of the superconducting winding, the second pipe is mechanically connected with the second flange and axially passes through another portion of the Assembly of the superconducting winding.

25. Rotating machine p, in which the first tube contains Inconel.

 

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