Spiral hollow-core armature stator of superconducting excitation motor and assembly method thereof

Abstract

The present invention discloses a spiral hollow armature stator of a superconducting excitation motor and an assembly method thereof. The spiral hollow armature stator of the superconducting excitation motor comprises a stator core and an armature winding, wherein the armature winding is installed in the stator core, and the spiral hollow armature stator comprises an outer insulating support frame, an inner insulating support frame and an inner tube of the support frame, wherein a plurality of first armature winding installation grooves are arranged along a circumferential spiral on the inner circumferential surface of the outer insulating support frame, and a plurality of second armature winding installation grooves are arranged along a circumferential spiral on the inner circumferential surface of the inner insulating support frame, wherein the armature winding is installed in the first armature winding installation groove and the second armature winding installation groove, wherein a plurality of first spiral teeth matching with the plurality of first armature winding installation grooves are arranged on the outer circumferential surface of the inner insulating support frame, and a plurality of second spiral teeth matching with the plurality of second armature winding installation grooves are arranged on the outer circumferential surface of the inner tube of the support frame. The present application improves the insulation withstand voltage performance of the stator and can realize good support for the armature winding.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a spiral hollow-core armature stator of a superconducting excitation motor and an assembly method thereof. Background Art

[0002] A superconducting excitation motor refers to a motor whose rotor excitation winding is made of superconducting materials and is wound with wires that can carry high-density currents under strong magnetic fields. The armature winding can generate a strong magnetic field that saturates the stator teeth. The air-gap armature structure without magnetic teeth increases the upper limit of the number of turns per phase, further increasing the voltage level of the armature winding. However, as the voltage increases, the insulation thickness of the winding gradually increases, which poses a challenge to the cooling of the motor, especially the cooling of the winding ends. Therefore, many armature windings in the prior art adopt a spiral armature winding structure to increase the heat dissipation area of ​​the armature winding.

[0003] In terms of insulation, the traditional spiral winding wraps each turn of the winding with relative insulation, thus omitting a series of complex insulation designs. However, in a high-voltage environment, the cooling of the winding needs to be completed within the insulation layer due to the thick insulation, which greatly increases the difficulty of engineering implementation. In terms of fixed support, the traditional spiral winding mostly adopts the method of binding and stator core extension. Binding is to use two layers of armature windings with opposite spiral directions to bind and fix them at the intersection of the windings. However, this binding will form a diamond grid, which means that this binding scheme cannot provide a stable support effect, so a large number of rectangular support columns need to be extended inward from the stator core. These rectangular support columns pass through the diamond holes of the winding to provide lateral support for the surrounding windings. However, the spiral armature winding will be subject to radial electromagnetic forces, so a radial support structure also needs to be designed. At the same time, since the support column is made of ferromagnetic material, the winding in contact with it must be relatively wrapped with insulating material. Summary of the invention

[0004] To address the deficiencies of the prior art, the purpose of the present application is to provide a spiral hollow-core armature stator and an assembly method thereof for a superconducting excitation motor, which can improve the insulation and withstand voltage performance of the stator core and can provide good support for the armature winding.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] The spiral hollow-core armature stator of the superconducting excitation motor includes a stator core and an armature winding, wherein the stator core is formed by stacking silicon steel sheets; the armature winding is installed in the stator core; the spiral hollow-core armature stator also includes an outer insulating support frame, an inner insulating support frame and an inner tube of the support frame, wherein the stator core, the outer insulating support frame, the inner insulating support frame and the inner tube of the support frame are all in the shape of a circular ring column, the stator core is sleeved on the outer periphery of the outer insulating support frame, the inner side of the stator core is matched and fixed with the outer side of the outer insulating support frame, the outer insulating support frame is sleeved on the outer periphery of the inner insulating support frame, the inner side of the outer insulating support frame is matched and fixed with the outer side of the inner insulating support frame, the inner insulating support frame is sleeved on the outer periphery of the inner tube of the support frame, and the inner side of the inner insulating support frame is matched and fixed with the outer side of the inner tube of the support frame; a plurality of first armature winding installation grooves are opened on the inner side of the outer insulating support frame, and the plurality of first armature winding installation grooves are arranged in a spiral along the circumference of the outer insulating support frame. The notch of the first armature winding mounting groove is located on the inner circumferential surface of the outer insulating support frame, and a plurality of second armature winding mounting grooves are opened on the inner side of the inner insulating support frame. The plurality of second armature winding mounting grooves are arranged in a circumferential spiral along the inner insulating support frame, and the notch of the second armature winding mounting groove is located on the inner circumferential surface of the inner insulating support frame. The spiral direction of the first armature winding mounting groove is opposite to that of the second armature winding mounting groove, and an armature winding is installed in each first armature winding mounting groove and each second armature winding mounting groove; the outer side of the inner insulating support frame is provided with a plurality of first spiral teeth matching with the plurality of first armature winding mounting grooves, and the extension direction of the first spiral teeth is consistent with the extension direction of the first armature winding mounting groove, and the outer side of the inner tube of the support frame is provided with a plurality of second spiral teeth matching with the plurality of second armature winding mounting grooves, and the extension direction of the second spiral teeth is consistent with the extension direction of the second armature winding mounting groove.

[0007] As a preferred technical solution, the side wall surface of the first armature winding mounting groove is recessed inward to form a first armature winding cooling channel, the first armature winding cooling channel extends along the extension direction of the first armature winding mounting groove, and both ends of the first armature winding cooling channel pass through the outer insulating support frame; the side wall surface of the second armature winding mounting groove is recessed inward to form a second armature winding cooling channel, the second armature winding cooling channel extends along the extension direction of the second armature winding mounting groove, and both ends of the second armature winding cooling channel pass through the inner insulating support frame.

[0008] As a preferred technical solution, a plurality of support frame mounting grooves are provided on the inner side of the stator core, the plurality of support frame mounting grooves are arranged at intervals along the circumference of the stator core, the support frame mounting grooves extend along the axial direction of the stator core, the groove openings of the support frame mounting grooves are located on the inner circumferential surface of the stator core, and a plurality of support frame mounting protrusions corresponding to the plurality of support frame mounting grooves are provided on the outer side of the external insulating support frame, the support frame mounting protrusions are at least partially located in the support frame mounting grooves and are clamped with the support frame mounting grooves.

[0009] As a preferred technical solution, a cross-sectional plane perpendicular to the axial direction of the stator core is defined, and the cross-sections of the support frame mounting protrusion and the support frame mounting groove cut by the cross-sectional plane are both trapezoidal. The spiral hollow armature stator includes a first elastic insulating gasket, which is arranged on both sides of the support frame mounting protrusion and between the support frame mounting groove.

[0010] As a preferred technical solution, the spiral hollow-core armature stator of the superconducting excitation motor also includes two end pressure plates arranged at opposite axial ends of the spiral hollow-core armature stator, a plurality of first pressure plate mounting grooves are provided at both ends of the inner tube of the support frame, and the plurality of first pressure plate mounting grooves are arranged at intervals along the circumferential direction of the inner tube of the support frame at the end of the inner tube of the support frame, a plurality of first clamping protrusions matching with the plurality of first pressure plate mounting grooves are provided on one side of the end pressure plate close to the inner tube of the support frame, and a plurality of through holes are provided on the end pressure plate for allowing the armature winding to extend and connecting the first armature winding cooling channel and the second armature winding cooling channel.

[0011] As a preferred technical solution, the spiral hollow armature stator of the superconducting excitation motor also includes two end pressure plates arranged at opposite axial ends of the spiral hollow armature stator, a plurality of second pressure plate mounting grooves are provided at both ends of the outer insulating support frame, and the plurality of second pressure plate mounting grooves are arranged at the ends of the inner circumferential surface of the outer insulating support frame at circumferential intervals of the outer insulating support frame, and the end pressure plates are provided with a plurality of second clamping protrusions matching with the plurality of second pressure plate mounting grooves; a plurality of third pressure plate mounting grooves are provided at both ends of the inner insulating support frame, and the plurality of third pressure plate mounting grooves are arranged at the ends of the outer circumferential surface of the inner insulating support frame at circumferential intervals of the inner insulating support frame, the notches of the third pressure plate mounting grooves are arranged toward the notches of the second pressure plate mounting grooves, and the end pressure plates are provided with a plurality of third clamping protrusions matching with the plurality of third pressure plate mounting grooves.

[0012] As a preferred technical solution, the spiral hollow-core armature stator of the superconducting excitation motor also includes two end pressure plates arranged at opposite axial ends of the spiral hollow-core armature stator, and a plurality of pressure plate mounting grooves are respectively arranged at intervals along the circumferential direction at both ends of the stator core, and the two end pressure plates are respectively installed in cooperation with the plurality of pressure plate mounting grooves at both ends of the stator core; the spiral hollow-core armature stator of the superconducting excitation motor also includes a plurality of fixing frames, and the plurality of fixing frames are arranged on the outer periphery of the stator core along the circumferential direction of the stator core, and the fixing frames extend along the axial direction of the stator core, and press-fitting fixing parts for press-fitting the end pressure plates and the stator core are provided at both ends of the fixing frames, and the press-fitting fixing parts of each fixing frame are respectively arranged at a pressure plate mounting groove, and the press-fitting fixing parts at both ends of the fixing frame respectively press the two end pressure plates toward the stator core along the axial direction of the stator core.

[0013] As a preferred technical solution, the spiral hollow armature stator of the superconducting excitation motor further includes a second elastic insulating gasket, which is arranged on both sides of each pressure plate mounting groove of the stator core and between the end pressure plates.

[0014] As a preferred technical solution, the spiral hollow armature stator of the superconducting excitation motor also includes a stator outer tube and a stator inner tube. The stator outer tube is mounted outside a plurality of fixing frames, and a stator core cooling channel is formed between two opposite side walls of two adjacent fixing frames, an inner wall surface of the stator outer tube, and an outer wall surface of the stator core. The stator inner tube is mounted inside an inner tube of a support frame, and a cooling medium accommodating space is formed between the stator inner tube and the stator outer tube.

[0015] The present application also provides a method for assembling a spiral hollow-core armature stator of a superconducting excitation motor, comprising the following steps:

[0016] Assemble the armature windings from the inner circumference of the outer insulating support frame one by one into the first armature winding mounting grooves of the outer insulating support frame; insert the first helical teeth on the outer circumference of the inner insulating support frame into the corresponding first armature winding mounting grooves on the inner circumference of the outer insulating support frame, so that the inner insulating support frame is screwed into the outer insulating support frame; assemble the armature windings from the inner circumference of the inner insulating support frame one by one into the second armature winding mounting grooves of the inner insulating support frame; insert the second helical teeth on the outer circumference of the inner tube of the support frame into the corresponding second armature winding mounting grooves on the inner circumference of the inner insulating support frame, so that the inner tube of the support frame is screwed into the inner insulating support frame. The outer insulating support frame is inserted into the stator core along the axial direction; the two end pressure plates are respectively installed in the pressure plate installation grooves at the two ends of the stator core, and the first clamping protrusion of the end pressure plate is matched with the first pressure plate installation groove on the inner tube of the support frame, and the second clamping protrusion of the end pressure plate is matched with the second pressure plate installation groove on the outer insulating support frame and the inner insulating support frame; each fixing frame is installed to the outer periphery of the stator core, so that each fixing frame clamps the stator core and the end pressure plates at the two ends of the stator core; the stator outer tube is sleeved outside each fixing frame, and the stator inner tube is sleeved into the inner tube of the support frame.

[0017] The present application adopts an outer insulating support frame and an inner insulating support frame to fix and support the armature winding, and serves as the insulating material for the slot insulation, layer insulation and main insulation of the armature winding. Therefore, the present application simultaneously realizes the fixed support and reliable insulation of the armature winding. At this time, the armature winding does not need to be wrapped with thick insulating material, so that the surface of the armature winding can directly contact with the cooling medium, realizing the rapid cooling and heat dissipation of the armature winding.

[0018] In addition, the present application elementizes the armature winding support structure, screws the inner insulating support frame into the outer insulating support frame, and can press and fix each armature winding in each first armature winding installation groove; screws the inner tube of the support frame into the inner insulating support frame, and can press and fix each armature winding in each second armature winding installation groove; presses the outer insulating support frame into the stator core, and can realize the fixed assembly of the stator core and the armature winding. Therefore, the present application can conveniently realize the assembly of the stator core and the armature winding of the spiral air-core armature stator of the superconducting excitation motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a spiral hollow-core armature stator of a superconducting excitation motor of the present application;

[0020] Figure 2 An exploded view of a spiral hollow-core armature stator of a superconducting excitation motor of the present application;

[0021] Figure 3 This is a schematic structural diagram of an outer insulating support frame of a spiral hollow-core armature stator of a superconducting excitation motor of the present application;

[0022] Figure 4 This is a schematic structural diagram of an inner insulating support frame of a spiral hollow-core armature stator of a superconducting excitation motor of the present application;

[0023] Figure 5 This is a schematic diagram of the structure of the inner tube of the support frame of the spiral hollow armature stator of the superconducting excitation motor of the present application;

[0024] Figure 6 A cross-sectional view of a spiral hollow-core armature stator of a superconducting excitation motor of the present application cut by a cutting plane defined in a specific embodiment;

[0025] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0026] Figure 8 This is a schematic structural diagram of the spiral hollow-core armature stator structure of the superconducting excitation motor of the present application;

[0027] Fig. 9 for Figure 8 A partial enlarged view of point B in the middle;

[0028] Fig.10 This is a schematic structural diagram of the end pressure plate of the spiral hollow-core armature stator of the superconducting excitation motor of the present application. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the specific implementation manner of the present application will be clearly and completely described below in conjunction with the drawings in the implementation manner of the present application.

[0030] It should be noted that the words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantitative limitation, but indicate the existence of at least one. "Multiple" or "several" means at least two. Unless otherwise specified, words such as "front", "back", "left", "right", "bottom" and / or "top" are only for the convenience of description and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0031] The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] like Figure 1 and Figure 2 As shown, the present application provides a spiral hollow armature stator 100 of a superconducting excitation motor, and the spiral hollow armature stator 100 of the superconducting excitation motor includes a stator core 1 and an armature winding 24. The stator core 1 is a component of the magnetic circuit of the spiral hollow armature stator 100 of the superconducting excitation motor, and the stator core 1 is formed by stacking silicon steel sheets. The armature winding 24 is installed in the stator core 1, and the armature winding 24 can generate a magnetic field.

[0033] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the spiral hollow armature stator 100 of the superconducting excitation motor further includes an armature winding support component 2, and the armature winding support component 2 includes an outer insulating support frame 21, an inner insulating support frame 22 and a support frame inner cylinder 23. In order to clearly show the structure of the spiral hollow armature stator 100, Figure 2Only one set of armature windings 24 is shown, and the set of armature windings 24 includes one armature winding 24 arranged in the outer insulating support frame 21 and one armature winding 24 arranged in the inner insulating support frame 22 .

[0034] The stator core 1, the outer insulating support frame 21, the inner insulating support frame 22 and the support frame inner tube 23 are all in the shape of an annular column. Since the rotor rotates around its own axis when the spiral hollow armature stator 100 of the superconducting excitation motor is working, the stator core 1 needs to be set in the shape of an annular column to form a circumferentially uniform magnetic field. At the same time, each armature winding 24 also needs to be evenly arranged around the circumference of the rotor. Therefore, the outer insulating support frame 21, the inner insulating support frame 22 and the support frame inner tube 23 are set in the shape of an annular column, which can facilitate the uniform arrangement of the armature winding 24 around the circumference of the rotor. In addition, the outer insulating support frame 21, the inner insulating support frame 22 and the support frame inner tube 23 set in the shape of an annular column also facilitate the matching installation between the stator core 1, the outer insulating support frame 21, the inner insulating support frame 22 and the support frame inner tube 23.

[0035] like Figure 1 and Figure 2 As shown, the stator core 1 is sleeved on the outer periphery of the outer insulating support frame 21, and the inner side of the stator core 1 is fixedly matched with the outer side of the outer insulating support frame 21. The outer insulating support frame 21 is sleeved on the outer periphery of the inner insulating support frame 22, and the inner side of the outer insulating support frame 21 is fixedly matched with the outer side of the inner insulating support frame 22. The inner insulating support frame 22 is sleeved on the outer periphery of the support frame inner tube 23, and the inner side of the inner insulating support frame 22 is fixedly matched with the outer side of the support frame inner tube 23. Among them, the inner side of the stator core 1 refers to the side away from the inner circumference of the stator core 1 to its outer circumference; the outer side of the outer insulating support frame 21 refers to the side away from the outer circumference of the outer insulating support frame 21 to its inner circumference, the inner side of the outer insulating support frame 21 refers to the side away from the inner circumference of the outer insulating support frame 21 to its outer circumference, and the outer periphery of the outer insulating support frame 21 refers to the outer circumference of the outer insulating support frame 21; the outer side of the inner insulating support frame 22 refers to the side away from the outer circumference of the inner insulating support frame 22 to its inner circumference, the inner side of the inner insulating support frame 22 refers to the side away from the inner circumference of the inner insulating support frame 22 to its outer circumference, and the outer periphery of the inner insulating support frame 22 refers to the outer circumference of the inner insulating support frame 22; the outer side of the support frame inner tube 23 refers to the side away from the outer circumference of the support frame inner tube 23 to its inner circumference, and the outer periphery of the support frame inner tube 23 refers to the outer circumference of the support frame inner tube 23.

[0036] like Figure 2 and Figure 3 As shown, the outer insulating support frame 21 is provided with a plurality of first armature winding installation grooves 211, and the plurality of first armature winding installation grooves 211 are arranged spirally along the circumference of the outer insulating support frame 21. The notches of the first armature winding installation grooves 211 are located on the inner circumference of the outer insulating support frame 21. Figure 2and Figure 4 As shown, the inner insulating support frame 22 is provided with a plurality of second armature winding installation grooves 221, and the plurality of second armature winding installation grooves 221 are arranged in a spiral along the circumference of the inner insulating support frame 22. The notch of the second armature winding installation groove 221 is located on the inner circumferential surface of the inner insulating support frame 22. The spiral direction of the first armature winding installation groove 211 is opposite to that of the second armature winding installation groove 221. In the present application, the first armature winding installation groove 211 is arranged in a counterclockwise spiral (left-handed); the second armature winding installation groove 221 is arranged in a clockwise spiral (right-handed). An armature winding 24 is installed in each first armature winding installation groove 211 and each second armature winding installation groove 221.

[0037] In the present application, the parts of several armature windings 24 extending out of the outer insulating support frame 21 / inner insulating support frame 22 are in the form of straight segments, and several armature windings 24 are arranged in the form of Robel transposition. The so-called "transposition" means that the multiple strands of wire inside the armature winding 24 are cross-transposed in the straight segment of the armature winding 24. By changing the spatial position of the wire, the magnetic flux of each strand of wire is as balanced as possible, and a basically equal induced potential is generated to eliminate the internal circulation in the armature winding 24 and reduce the loss of the armature winding 24. It can be seen that each strand of wire constituting the armature winding 24 is not a straight line with the same length as the armature winding 24, but each strand of wire is slightly longer than the length of the armature winding 24, because it is necessary to braid and transpose in the straight segment of the armature winding 24. This armature winding 24 that has been braided and transposed is called a Robel wire rod, that is, a braided wire rod. Robel transposition is a prior art and will not be repeated in this application.

[0038] After the armature winding 24 is installed, the armature windings 24 installed on the outer insulating support frame 21 form an outer spiral winding layer, and the armature windings 24 installed on the inner insulating support frame 22 form an inner spiral winding layer. Since the adjacent armature windings 24 in the outer spiral winding layer are separated by the outer insulating support frame 21, and the adjacent armature windings 24 in the inner spiral winding layer are separated by the inner insulating support frame 22, the outer insulating support frame 21 and the inner insulating support frame 22 realize the inter-slot insulation (phase insulation) of the armature windings 24 installed in the first armature winding installation groove 211 and the second armature winding installation groove 221. Since the outer spiral winding layer and the inner spiral winding layer are separated by the inner insulating support frame 22, the inner insulating support frame 22 realizes the inter-layer insulation between the inner and outer spiral winding layers. Since the surface of the armature winding 24 in the first armature winding installation slot 211 is wrapped by the outer insulating support frame 21 and the inner insulating support frame 22, and the surface of the armature winding 24 in the second armature winding installation slot 221 is wrapped by the inner insulating support frame 22 and the support frame inner tube 23, the outer insulating support frame 21, the inner insulating support frame 22 and the support frame inner tube 23 realize the main insulation of the armature winding 24. The main insulation of the armature winding 24 refers to the insulation between the armature winding 24 and the stator core 1, and between different armature windings 24. In the prior art, it is generally achieved by using thick insulating materials wrapped on the surface of the armature winding 24 wire strands.

[0039] In the present application, the outer insulating support frame 21, the inner insulating support frame 22 and the support frame inner tube 23 are made of materials such as glass fiber reinforced plastics and EPGC (epoxy glass cloth) laminates. Glass fiber reinforced plastics and EPGC laminates have high strength and high pressure resistance, and provide fixed support for the inner and outer spiral winding layers, and serve as insulating materials for the inter-slot insulation, inter-layer insulation and main insulation of the armature winding 24. Therefore, the present application simultaneously achieves fixed support and reliable insulation of the armature winding 24.

[0040] like Figure 2 and Figure 4 As shown, a plurality of first helical teeth 222 matching with the plurality of first armature winding mounting grooves 211 are provided on the outer circumferential surface of the inner insulating support frame 22, and the extension direction of the first helical teeth 222 is consistent with the extension direction of the first armature winding mounting grooves 211. By inserting the plurality of first helical teeth 222 on the inner insulating support frame 22 into the plurality of first armature winding mounting grooves 211 on the outer insulating support frame 21 one by one, the inner insulating support frame 22 can be screwed into the outer insulating support frame 21, and at this time, the first helical teeth 222 fix and press the armature winding 24 in the first armature winding mounting groove 211 into the first armature winding mounting groove 211.

[0041] like Figure 2 and Figure 5As shown, a plurality of second helical teeth 231 matching with the plurality of second armature winding mounting grooves 221 are provided on the outer circumferential surface of the support frame inner cylinder 23, and the extension direction of the second helical teeth 231 is consistent with the extension direction of the second armature winding mounting grooves 221. By inserting the plurality of second helical teeth 231 on the support frame inner cylinder 23 into the plurality of second armature winding mounting grooves 221 on the inner insulating support frame 22 one by one, the support frame inner cylinder 23 can be screwed into the inner insulating support frame 22, and at this time, the second helical teeth 231 fix and press the armature winding 24 of the second armature winding mounting groove 221 into the second armature winding mounting groove 221.

[0042] Specifically, a third elastic insulating gasket 91 is provided between adjacent first spiral teeth 222 on the outer circumferential surface of the inner insulating support frame 22. After the outer insulating support frame 21 and the inner insulating support frame 22 are assembled, the third elastic insulating gasket 91 is provided between the outer insulating support frame 21 and the inner insulating support frame 22 to achieve elastic fastening between the outer insulating support frame 21 and the inner insulating support frame 22. The third elastic insulating gasket 91 also achieves inter-turn insulation and inter-strand insulation of each armature winding 24 in the outer insulating support frame 21.

[0043] A fourth elastic insulating gasket 10 is provided between adjacent second spiral teeth 231 on the outer circumferential surface of the support frame inner cylinder 23. After the support frame inner cylinder 23 and the inner insulating support frame 22 are assembled, the fourth elastic insulating gasket 10 is provided between the support frame inner cylinder 23 and the inner insulating support frame 22 to achieve elastic fastening between the support frame inner cylinder 23 and the inner insulating support frame 22. The fourth elastic insulating gasket 10 also achieves inter-turn insulation and inter-strand insulation of each armature winding 24 in the inner insulating support frame 22.

[0044] As a way to achieve this, Figure 3 , Figure 6 and Figure 7 As shown, the side wall of the first armature winding installation slot 211 is recessed inward to form a first armature winding cooling channel 212, and the first armature winding cooling channel 212 extends along the extension direction of the first armature winding installation slot 211, and both ends of the first armature winding cooling channel 212 pass through the outer insulating support frame 21. Figure 4 , Figure 6 and Figure 7As shown, the side wall surface of the second armature winding installation groove 221 is recessed inward to form a second armature winding cooling channel 223, and the second armature winding cooling channel 223 extends along the extension direction of the second armature winding installation groove 221, and both ends of the second armature winding cooling channel 223 penetrate the inner insulating support frame 22. After the cooling medium passes through the first armature winding cooling channel 212 and the second armature winding cooling channel 223, since the cooling medium is in direct contact with the surface of the armature winding 24, it can take away the surface heat of the armature winding 24, thereby cooling the armature winding 24. The cooling medium passing through the first armature winding cooling channel 212 and the second armature winding cooling channel 223 can be insulating cooling oil or air, etc. Since the first armature winding cooling channel 212 is formed by the inward depression of the side wall surface of the first armature winding mounting groove 211, it is possible to avoid the armature winding 24 in the first armature winding mounting groove 211 blocking the first armature winding cooling channel 212, thereby improving the cooling effect; since the second armature winding cooling channel 223 is formed by the inward depression of the side wall surface of the second armature winding mounting groove 221, it is possible to avoid the armature winding 24 in the second armature winding mounting groove 221 blocking the second armature winding cooling channel 223, thereby improving the cooling effect.

[0045] The armature winding 24 of the present application does not need to be wrapped with thick insulating material, so that the surface of the armature winding 24 can directly contact the cooling medium in the first armature winding cooling channel 212 or the second armature winding cooling channel 223, so as to achieve rapid cooling and heat dissipation of the armature winding 24, thereby improving the cooling effect. As an implementation method, Figure 2 As shown, the stator core 1 is provided with a plurality of support frame mounting grooves 11, and the plurality of support frame mounting grooves 11 are arranged at intervals along the circumference of the stator core 1. The support frame mounting grooves 11 extend along the axial direction of the stator core 1, and the notches of the support frame mounting grooves 11 are located on the inner circumference of the stator core 1. The outer side surface of the outer insulating support frame 21 is provided with a plurality of support frame mounting protrusions 213 corresponding to the plurality of support frame mounting grooves 11, and the support frame mounting protrusions 213 are at least partially located in the support frame mounting grooves 11 and are engaged with the support frame mounting grooves 11. The outer insulating support frame 21 is inserted into the stator core 1 so that the support frame mounting protrusions 213 are engaged with the support frame mounting grooves 11, thereby realizing the circumferential displacement constraint of the outer insulating support frame 21 and the stator core 1.

[0046] Specifically, Figure 2 , Figure 6 and Figure 7As shown, a cross-sectional plane perpendicular to the axial direction of the stator core 1 is defined, and the cross-sections of the support frame mounting protrusion 213 and the support frame mounting groove 11 cut by the cross-sectional plane are both trapezoidal. The cross-sections of the support frame mounting protrusion 213 and the support frame mounting groove 11 cut by the cross-sectional plane are set to be trapezoidal, so that the pressure on the stator core 1 on the side of the support frame mounting groove 11 is dispersed into two forces along the tangent and radial directions of the stator core 1. Similarly, the pressure on the side of the support frame mounting protrusion 213 of the outer insulating support frame 21 is dispersed into two forces along the tangent and radial directions of the outer insulating support frame 21, thereby avoiding the stator core 1 at the support frame mounting groove 11 and the outer insulating support frame 21 at the support frame mounting protrusion 213 from being crushed.

[0047] As another optional implementation, the cross-sections of the support frame mounting protrusion 213 and the support frame mounting groove 11 cut by the above-mentioned cutting plane can also be semicircular or other shapes.

[0048] The spiral hollow armature stator 100 includes a first elastic insulating gasket 3, which is arranged between the two sides of the support frame mounting protrusion 213 and the support frame mounting groove 11. During the operation of the spiral hollow armature stator 100 of the superconducting excitation motor, the stator core 1 is easily expanded due to heat, and the thermal expansion of the stator core 1 is likely to cause the structure between the stator core 1 and the external insulating support frame 21 to become loose. In the present application, since the first elastic insulating gasket 3 is provided, after the stator core 1 thermally expands, the first elastic insulating gasket 3 itself undergoes elastic deformation and expands, thereby avoiding the structural loosening caused by the thermal expansion of the stator core 1.

[0049] As a way to achieve this, Figure 1 , Figure 2 and Fig.10As shown, the spiral hollow armature stator 100 of the superconducting excitation motor also includes two end pressure plates 4, which are arranged at opposite axial ends of the spiral hollow armature stator 100 of the superconducting excitation motor and are used to constrain the axial displacement of the stator core 1 and the armature winding support component 2. The axial displacement constraint of the armature winding 2 by the end pressure plate 4 includes the axial displacement constraint of the external insulating support frame 21, the internal insulating support frame 22 and the support frame inner cylinder 23. The end pressure plate 4 is provided with a plurality of through holes 44 for the armature winding 24 to extend and connect the first armature winding cooling channel 212 and the second armature winding cooling channel 223. In the present application, the through hole 44 includes a rectangular hole 441 and a plurality of semicircular holes 442 arranged on both sides of the rectangular hole 441. Each semicircular hole 442 is connected to each first armature winding cooling channel 212 and the second armature winding cooling channel 223 respectively. The shape of the semicircular hole 442 is adapted to the cross-sectional shape of the first armature winding cooling channel 212 and the second armature winding cooling channel 223 cut by the above-mentioned cutting plane. In the present application, the cross-sectional shape of the first armature winding cooling channel 212 and the second armature winding cooling channel 223 cut by the above-mentioned cutting plane is a semicircular shape. It can be understood that when the cross-sectional shape of the first armature winding cooling channel 212 and the second armature winding cooling channel 223 cut by the above-mentioned cutting plane is a trapezoid or other shape, the semicircular hole 442 can be adaptively set to a trapezoid or other shape.

[0050] Specifically, Figure 8 , Fig. 9 and Fig.10 As shown, a plurality of pressure plate installation grooves 12 are respectively provided at both ends of the stator core 1 along the circumference of the stator core 1, and two end pressure plates 4 are respectively installed in cooperation with the plurality of pressure plate installation grooves 12 at both ends of the stator core 1. After the end pressure plates 4 are installed in the plurality of pressure plate installation grooves 12 at the ends of the stator core 1, the circumferential displacement of the stator core 1 and the end pressure plates 4 is constrained.

[0051] More specifically, the spiral hollow armature stator 100 of the superconducting excitation motor further includes a second elastic insulating gasket 5, which is disposed between the two sides of each pressure plate mounting groove 12 of the stator core 1 and the end pressure plate 4. During the operation of the spiral hollow armature stator 100 of the superconducting excitation motor, the stator core 1 is prone to expansion due to heat, and the thermal expansion of the stator core 1 is prone to cause the end pressure plate 4 to be compressed and ruptured. Since the second elastic insulating gasket 5 is provided in the present application, after the stator core 1 is thermally expanded, the second elastic insulating gasket 5 is compressed, which can prevent the end pressure plate 4 from being compressed and ruptured due to the thermal expansion of the stator core 1.

[0052] In the present application, the first elastic insulating gasket 3 and the second elastic insulating gasket 5 are made of materials such as polyimide film, low-resistance anti-corona tape and high-resistance anti-corona tape to meet the following requirements: good insulation performance, strong plasticity, high elasticity, and insoluble in grease.

[0053] As a way to achieve this, Figure 1 and Figure 2 As shown, the spiral hollow armature stator 100 of the superconducting excitation motor also includes a plurality of fixing frames 6, which are arranged on the outer periphery of the stator core 1 along the circumferential direction of the stator core 1, and the fixing frames 6 extend along the axial direction of the stator core 1. Press-fit fixing portions 61 are provided at both ends of the fixing frames 6, and the press-fit fixing portions 61 are used to press-fit the end pressure plates 4 and the stator core 1, and the press-fit fixing portions 61 of each fixing frame 6 are respectively arranged at a pressure plate mounting groove 12. The fixing frames 6 press-fit the two end pressure plates 4 on the two ends of the stator core 1 and the armature winding support component 2, respectively, to realize the axial displacement constraint of the end pressure plates 4 and the stator core 1, the outer insulating support frame 21, the inner insulating support frame 22, and the support frame inner cylinder 23.

[0054] As a way to achieve this, Figure 5 , Figure 8 , Fig. 9 and Fig.10 As shown, a plurality of first pressing plate mounting grooves 232 are provided at both ends of the support frame inner tube 23, and the plurality of first pressing plate mounting grooves 232 are arranged at the ends of the support frame inner tube 23 along the circumference of the support frame inner tube 23. A plurality of first clamping protrusions 41 matching with the plurality of first pressing plate mounting grooves 232 are provided on one side of the end pressing plate 4 close to the support frame inner tube 23. After the end pressing plate 4 is installed, the first clamping protrusions 41 on the end pressing plate 4 match with the first pressing plate mounting grooves 232 on the support frame inner tube 23, so as to realize the circumferential displacement constraint of the end pressing plate 4 and the support frame inner tube 23.

[0055] As a way to achieve this, Figure 3 , Figure 8 , Fig. 9 and Fig.10 As shown, a plurality of second pressing plate mounting slots 214 are provided at both ends of the outer insulating support frame 21, and the plurality of second pressing plate mounting slots 214 are arranged at the ends of the inner circumference of the outer insulating support frame 21 along the circumference of the outer insulating support frame 21. A plurality of second clamping protrusions 42 matching with the plurality of second pressing plate mounting slots 214 are provided on the end pressing plate 4. After the end pressing plate 4 is installed, the second clamping protrusions 42 on the end pressing plate 4 match with the second pressing plate mounting slots 214 on the outer insulating support frame 21, so as to realize the circumferential displacement constraint of the end pressing plate 4 and the outer insulating support frame 21.

[0056] As a way to achieve this, Figure 4 , Figure 8 , Fig. 9 and Fig.10As shown, a plurality of third pressure plate mounting slots 224 are provided at both ends of the inner insulating support frame 22, and the plurality of third pressure plate mounting slots 224 are arranged at the ends of the outer peripheral surface of the inner insulating support frame 22 along the circumference of the inner insulating support frame 22. The notches of the third pressure plate mounting slots 224 are arranged toward the notches of the second pressure plate mounting slots 214. The end pressure plate 4 is provided with a plurality of third clamping protrusions 43 that match the plurality of third pressure plate mounting slots 224. After the end pressure plate 4 is installed, the third clamping protrusions 43 on the end pressure plate 4 match the third pressure plate mounting slots 224 on the outer insulating support frame 21, so as to realize the circumferential displacement constraint of the end pressure plate 4 and the inner insulating support frame 22. And because the slot of the third pressure plate mounting slot 224 is arranged toward the slot of the second pressure plate mounting slot 214, the corresponding second clamping protrusion 42 and third clamping protrusion 43 on the end pressure plate 4 are subjected to radial forces in opposite directions, so that the end pressure plate 4 is better clamped to the outer insulating support frame 21 and the inner insulating support frame 22.

[0057] As a way to achieve this, Figure 1 , Figure 2 and Figure 7 As shown, the spiral hollow armature stator 100 of the superconducting excitation motor also includes a stator outer cylinder 7. The stator outer cylinder 7 is mounted outside a plurality of fixing frames 6, and a stator core cooling channel 9 is formed between two opposite side walls 601 of two adjacent fixing frames 6, an inner wall surface 701 of the stator outer cylinder 7, and an outer wall surface 101 of the stator core 1. After the cooling medium passes through the stator core cooling channel 9, since the cooling medium is in direct contact with the outer wall surface 101 of the stator core 1, the heat of the outer wall surface 101 of the stator core 1 can be taken away, thereby cooling the stator core 1. The cooling medium passing through the stator core cooling channel 9 can be insulating cooling oil or air.

[0058] Specifically, the spiral hollow armature stator 100 of the superconducting excitation motor further includes a stator inner cylinder 8. The stator inner cylinder 8 is sleeved in the support frame inner cylinder 23, and a cooling medium accommodating space is formed between the stator inner cylinder 8 and the stator outer cylinder 7. The stator inner cylinder 8 and the stator outer cylinder 7 wrap the stator core 1 and the armature winding 24, and insulating cooling oil or air is passed into the cooling medium accommodating space to achieve cooling and heat dissipation of the stator core 1 and the armature winding 24.

[0059] Through the above technical solution, the spiral hollow armature stator 100 of the superconducting excitation motor of the present application can achieve the following beneficial effects:

[0060] 1. The insulation requirements of the spiral air-core armature stator 100 armature winding of the superconducting excitation motor are met.

[0061] In order to meet the high voltage insulation requirements of the spiral hollow armature stator 100 of the superconducting excitation motor, the present application adopts insulating support materials such as glass fiber reinforced plastics and EPGC laminates to replace the traditional soft insulating materials. For the spiral armature winding, the areas that mainly require thick insulation include the armature winding 24, between the armature winding 24 and the stator core 1, between the inner and outer spiral winding layers, and between the ends of the armature winding 24. The corresponding insulation measures are as follows:

[0062] 1.1, the insulation between the armature windings 24, i.e., the inter-slot insulation, needs to withstand the voltage of the multi-turn armature windings. This part of the insulation is achieved by the first helical teeth 222, the second helical teeth 231, and the insulating cooling oil in the first armature winding mounting slot 211 and the second armature winding mounting slot 221.

[0063] 1.2. The insulation between the armature winding 24 and the stator core 1 is ground insulation, and needs to withstand the voltage relative to the ground. This part of the insulation is achieved by the external insulating support frame 21.

[0064] 1.3. The rotation directions of the inner and outer spiral winding layers are opposite. Each armature winding 24 of the outer spiral winding layer can cross all the armature windings 24 of the inner spiral winding layer. Therefore, the insulation between the inner and outer spiral winding layers needs to withstand the relative phase voltage, that is, the line voltage. This part of the insulation requires about 2 times the relative insulation thickness. This part of the insulation is realized by the inner insulating support frame 22.

[0065] 1.4. The insulation between the ends of the armature winding 24 is mainly inter-slot insulation, which is achieved by the end pressure plate 4.

[0066] 1.5. The insulation in the slot mainly includes inter-turn insulation and inter-strand insulation.

[0067] 2. The fixed support of the inner and outer spiral winding layers of the armature winding 24 is achieved.

[0068] In order to ensure the stability of the armature winding after being stressed, it is necessary to design sufficiently reliable fixing and positioning elements for the armature winding 24. The main difficulty is that the rotation directions of the inner and outer spiral winding layers are opposite, and the same support cannot be used to fix the inner and outer spiral winding layers. In addition, the positioning of the armature winding relative to the stator core 1 is also particularly important, otherwise the rotation offset of the armature winding relative to the stator core 1 will cause problems in the control of the spiral hollow armature stator 100 of the superconducting excitation motor. Therefore, the present application adopts the following technical solutions to achieve the fixed support of the inner and outer spiral winding layers of the armature winding 24:

[0069] 2.1, the inner armature winding 24 rotates clockwise, and the second armature winding mounting groove 221 rotating clockwise is used to constrain its tangential displacement, and the inner armature winding 24 is constrained in radial displacement by the inner tube 23 of the support frame. The inner tube 23 of the support frame and the inner insulating support frame 22 are assembled with each other by the second armature winding mounting groove 221 rotating clockwise.

[0070] 2.2, the outer armature winding 24 rotates counterclockwise, and a counterclockwise rotating first armature winding mounting groove 211 is used to constrain its tangential displacement, and an inner insulating support frame 22 is used to constrain the radial displacement of the outer armature winding 24, and the inner insulating support frame 22 and the outer insulating support frame 21 are assembled with each other by the counterclockwise first armature winding mounting groove 211.

[0071] 2.3, the outer insulating support frame 21 and the stator core 1 are matched with the support frame mounting protrusion 213 and the support frame mounting groove 11 to realize the positioning of the spiral armature winding relative to the stator core 1, and the first elastic insulating gasket 3 is added between the two to tighten and prevent the structure from loosening.

[0072] 2.4, the stator core 1 and the end pressure plate 4 are interlocked with each other, and the two are fastened with a second elastic insulating gasket 5, and finally fixed with a fixing member 6. The end pressure plate 4 is used to realize the axial displacement constraint of the armature winding support component 2, and at the same time, the first clamping protrusion 41 on the end pressure plate 4 and the first pressure plate installation groove 232 on the inner tube 23 of the support frame are inserted and matched to realize the circumferential displacement constraint of the armature winding support component 2.

[0073] 3. Improved cooling effect of the spiral hollow armature stator 100 of the superconducting excitation motor

[0074] The present application designs corresponding cooling channels according to the heat source distribution of the spiral armature winding, and adopts oil or ventilation for cooling:

[0075] 3.1. For the spiral armature winding 24, the first armature winding cooling channel 212 or the second armature winding cooling channel 223 is directly distributed on both sides of each armature winding 24. The armature winding 24 is in direct contact with the cooling medium, and the cooling effect is good.

[0076] 3.2. For the stator core 1, ventilation or oil cooling is adopted in the stator core cooling channel 9.

[0077] 3.3, the stator core cooling channel 9 needs to coordinate pressure and flow rate with the first armature winding cooling channel 212 and the second armature winding cooling channel 223 to avoid the cooling medium flowing too slowly in one of the channels.

[0078] The method for assembling the spiral hollow armature stator 100 of the superconducting excitation motor comprises the following steps:

[0079] Step 1, assembling the armature windings 24 from the inner circumference of the outer insulating support frame 21 into the first armature winding installation grooves 211 of each outer insulating support frame 21 one by one;

[0080] Step 2, adding a third elastic insulating gasket 91 between every two adjacent first helical teeth 222 on the outer circumferential surface of the inner insulating support frame 22, inserting the first helical teeth 222 on the outer circumferential surface of the inner insulating support frame 22 into the corresponding first armature winding mounting groove 211 on the inner circumferential surface of the outer insulating support frame 21, so that the inner insulating support frame 22 is screwed into the outer insulating support frame 21;

[0081] Step 3, assembling the armature windings 24 from the inner circumference of the inner insulating support frame 22 into the second armature winding installation grooves 221 of the inner insulating support frame 22 one by one;

[0082] Step 4, add a fourth elastic insulating gasket 10 between every two adjacent second helical teeth 231 on the outer circumference of the support frame inner tube 23, insert the second helical teeth 231 on the outer circumference of the support frame inner tube 23 into the corresponding second armature winding mounting groove 221 on the inner circumference of the inner insulating support frame 22, so that the support frame inner tube 23 is screwed into the inner insulating support frame 22;

[0083] Step 5, press the outer insulating support frame 21 into the stator core 1 along the axial direction;

[0084] Step 6, respectively install the two end pressure plates 4 into the pressure plate installation grooves 12 at both ends of the stator core 1, and make the first clamping protrusion 41 of the end pressure plate 4 match with the first pressure plate installation groove 232 on the support frame inner tube 23, make the second clamping protrusion 42 on the end pressure plate 4 match with the second pressure plate installation groove 214 on the outer insulating support frame 21, and make the third clamping protrusion 43 on the end pressure plate 4 match with the third pressure plate installation groove 224 on the outer insulating support frame 21;

[0085] Step 7, installing each fixing frame 6 to the outer periphery of the stator core 1, so that each fixing frame 6 clamps the stator core 1 and the end pressure plates 4 at both ends of the stator core 1;

[0086] Step 8: insert the stator outer cylinder 7 onto the outside of each fixing frame 6 , and insert the stator inner cylinder 8 into the support frame inner cylinder 23 .

[0087] It should be noted that the order of step 3, step 4 and step 1, step 2 can be reversed, that is, step 3, step 4 can be performed first, and then step 1, step 2.

[0088] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A spiral hollow armature stator of a superconducting excitation motor, comprising: A stator core, wherein the stator core is formed by laminating silicon steel sheets; An armature winding, the armature winding being installed in the stator core; It is characterized in that The spiral hollow armature stator also includes an outer insulating support frame, an inner insulating support frame and an inner tube of the support frame. The stator core, the outer insulating support frame, the inner insulating support frame and the inner tube of the support frame are all in the shape of a circular column. The stator core is sleeved on the outer periphery of the outer insulating support frame, the inner side of the stator core is matched and fixed with the outer side of the outer insulating support frame, the outer insulating support frame is sleeved on the outer periphery of the inner insulating support frame, the inner side of the outer insulating support frame is matched and fixed with the outer side of the inner insulating support frame, the inner insulating support frame is sleeved on the outer periphery of the inner tube of the support frame, and the inner side of the inner insulating support frame is matched and fixed with the outer side of the inner tube of the support frame; A plurality of first armature winding mounting grooves are provided on the inner side of the outer insulating support frame, the plurality of first armature winding mounting grooves are arranged in a circumferential spiral direction of the outer insulating support frame, and the notches of the first armature winding mounting grooves are located on the inner circumferential surface of the outer insulating support frame; a plurality of second armature winding mounting grooves are provided on the inner side of the inner insulating support frame, the plurality of second armature winding mounting grooves are arranged in a circumferential spiral direction of the inner insulating support frame, and the notches of the second armature winding mounting grooves are located on the inner circumferential surface of the inner insulating support frame; the spiral directions of the first armature winding mounting groove and the second armature winding mounting groove are opposite, and one armature winding is installed in each of the first armature winding mounting grooves and each of the second armature winding mounting grooves; The outer side of the inner insulating support frame is provided with a plurality of first helical teeth matching with the plurality of first armature winding mounting grooves, and the extension direction of the first helical teeth is consistent with the extension direction of the first armature winding mounting grooves. The outer side of the inner tube of the support frame is provided with a plurality of second helical teeth matching with the plurality of second armature winding mounting grooves, and the extension direction of the second helical teeth is consistent with the extension direction of the second armature winding mounting grooves.

2. The spiral hollow armature stator of the superconducting excitation motor according to claim 1, characterized in that: The side wall surface of the first armature winding mounting groove is recessed inward to form a first armature winding cooling channel, the first armature winding cooling channel extends along the extension direction of the first armature winding mounting groove, and both ends of the first armature winding cooling channel pass through the outer insulating support frame; the side wall surface of the second armature winding mounting groove is recessed inward to form a second armature winding cooling channel, the second armature winding cooling channel extends along the extension direction of the second armature winding mounting groove, and both ends of the second armature winding cooling channel pass through the inner insulating support frame.

3. The spiral hollow armature stator of the superconducting excitation motor according to claim 1, characterized in that: A plurality of support frame mounting grooves are provided on the inner side of the stator core, the plurality of support frame mounting grooves are arranged at intervals along the circumference of the stator core, the support frame mounting grooves extend along the axial direction of the stator core, the notches of the support frame mounting grooves are located on the inner circumferential surface of the stator core, and a plurality of support frame mounting protrusions corresponding to the plurality of support frame mounting grooves are provided on the outer side of the external insulating support frame, the support frame mounting protrusions are at least partially located in the support frame mounting grooves and are clamped with the support frame mounting grooves.

4. The spiral hollow armature stator of the superconducting excitation motor according to claim 3, characterized in that: A cross-sectional plane perpendicular to the axial direction of the stator core is defined, and the cross-sections of the support frame mounting protrusion and the support frame mounting groove cut by the cross-sectional plane are both trapezoidal, and the spiral hollow armature stator includes a first elastic insulating gasket, which is arranged on both sides of the support frame mounting protrusion and between the support frame mounting groove.

5. The spiral hollow armature stator of the superconducting excitation motor according to claim 1, characterized in that: The spiral hollow-core armature stator of the superconducting excitation motor also includes two end pressure plates arranged at opposite axial ends of the spiral hollow-core armature stator, and a plurality of first pressure plate mounting grooves are provided at both ends of the support frame inner tube, and the plurality of first pressure plate mounting grooves are arranged at intervals along the circumferential direction of the support frame inner tube at the end of the support frame inner tube, and a plurality of first clamping protrusions matching with the plurality of first pressure plate mounting grooves are provided on the side of the end pressure plate close to the support frame inner tube, and a plurality of through holes are provided on the end pressure plate for the armature winding to extend and connect the first armature winding cooling channel and the second armature winding cooling channel.

6. The spiral hollow armature stator of the superconducting excitation motor according to claim 1, characterized in that: The spiral hollow-core armature stator of the superconducting excitation motor also includes two end pressure plates arranged at opposite axial ends of the spiral hollow-core armature stator, and a plurality of second pressure plate mounting grooves are provided at both ends of the outer insulating support frame, and the plurality of second pressure plate mounting grooves are arranged at the ends of the inner circumferential surface of the outer insulating support frame along the circumferential intervals of the outer insulating support frame, and the end pressure plates are provided with a plurality of second clamping protrusions matching with the plurality of second pressure plate mounting grooves; a plurality of third pressure plate mounting grooves are provided at both ends of the inner insulating support frame, and the plurality of third pressure plate mounting grooves are arranged at the ends of the outer circumferential surface of the inner insulating support frame along the circumferential intervals of the inner insulating support frame, and the notches of the third pressure plate mounting grooves are arranged toward the notches of the second pressure plate mounting grooves, and the end pressure plates are provided with a plurality of third clamping protrusions matching with the plurality of third pressure plate mounting grooves.

7. The spiral hollow armature stator of the superconducting excitation motor according to claim 1, characterized in that: The spiral hollow-core armature stator of the superconducting excitation motor also includes two end pressure plates arranged at opposite axial ends of the spiral hollow-core armature stator, and a plurality of pressure plate mounting grooves are respectively arranged at intervals along the circumferential direction at both ends of the stator core, and the two end pressure plates are respectively installed in cooperation with the plurality of pressure plate mounting grooves at both ends of the stator core; the spiral hollow-core armature stator of the superconducting excitation motor also includes a plurality of fixing frames, and the plurality of fixing frames are arranged on the outer periphery of the stator core along the circumferential direction of the stator core, and the fixing frames extend along the axial direction of the stator core, and press-fitting fixing parts for press-fitting the end pressure plates and the stator core are provided at both ends of the fixing frames, and the press-fitting fixing parts of each fixing frame are respectively arranged at one of the pressure plate mounting grooves, and the press-fitting fixing parts at both ends of the fixing frame respectively press the two end pressure plates toward the stator core along the axial direction of the stator core.

8. The spiral hollow armature stator of the superconducting excitation motor according to claim 7, characterized in that: The spiral hollow armature stator of the superconducting excitation motor further comprises a second elastic insulating gasket, which is arranged on both sides of each of the pressure plate mounting grooves of the stator core and between the end pressure plates.

9. The spiral hollow armature stator of the superconducting excitation motor according to claim 7, characterized in that: The spiral hollow armature stator of the superconducting excitation motor also includes a stator outer cylinder and a stator inner cylinder. The stator outer cylinder is sleeved outside the plurality of fixing frames, and a stator core cooling channel is formed between two opposite side walls of two adjacent fixing frames, an inner wall surface of the stator outer cylinder, and an outer wall surface of the stator core. The stator inner cylinder is sleeved inside the inner cylinder of the support frame, and a cooling medium accommodating space is formed between the stator inner cylinder and the stator outer cylinder.

10. A method for assembling a spiral hollow-core armature stator of a superconducting excitation motor, characterized in that: The following steps are involved: Assemble the armature windings one by one from the inner circumference of the outer insulating support frame into the first armature winding installation grooves of the outer insulating support frame; Insert the first helical teeth on the outer circumferential surface of the inner insulating support frame into the corresponding first armature winding mounting groove on the inner circumferential surface of the outer insulating support frame, so that the inner insulating support frame is screwed into the outer insulating support frame; Assemble the armature windings one by one from the inner circumference of the inner insulating support frame into the second armature winding installation grooves of the inner insulating support frame; Insert the second helical teeth on the outer circumference of the inner tube of the support frame into the corresponding second armature winding installation groove on the inner circumference of the inner insulating support frame, so that the inner tube of the support frame is screwed into the inner insulating support frame; Press the outer insulating support frame into the stator core along the axial direction; Install the two end pressure plates into the pressure plate installation grooves at both ends of the stator core respectively, and make the first clamping protrusion of the end pressure plate match with the first pressure plate installation groove on the inner tube of the support frame, and make the second clamping protrusion of the end pressure plate match with the second pressure plate installation groove on the outer insulating support frame and the inner insulating support frame; Install each fixing frame to the outer periphery of the stator core so that each fixing frame clamps the stator core and the end pressure plates at both ends of the stator core; The stator outer cylinder is mounted on the outside of each fixing frame, and the stator inner cylinder is mounted on the inner cylinder of the supporting frame.

Images