Hybrid power system

Abstract

To accurately detect a rotation parameter of a rotating shaft in a rotating electric machine system that constitutes a compound power system, and facilitate the maintenance of a rotation parameter detector.SOLUTION: A rotating electric machine system 10 constituting a compound power system 300 includes a rotating electric machine 12, a rotating electric machine housing 14 that houses the rotating electric machine 12, and a rotation parameter detector (140) that detects a rotation parameter of a rotating shaft 40 that constitutes the rotating electrical machine. The rotating shaft 40 includes a first end and a second end, and a first bearing 92 and a second bearing 94 are provided between the housing 14 and the first end and the second end. Here, the first end includes a protruding tip 104 that passes through the first bearing 92 and protrudes outside the housing 14. The protruding tip is provided with the rotation parameter detector.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a hybrid power system in which a rotating electrical machine and an internal combustion engine are integrally configured.

Background Art

[0002] Patent Document 1 discloses a hybrid power system in which a rotating electrical machine and a gas turbine engine, which is a type of internal combustion engine, are combined and integrated. In this case, the rotating shaft of the rotor constituting the rotating electrical machine and the output shaft of the gas turbine engine are connected on the same axis, and both shafts rotate integrally. As shown in FIG. 1 of Patent Document 1, the rotating shaft is rotatably supported via bearings with respect to a housing for a rotating electrical machine that houses a stator.

[0003] A connector for electrically connecting an external device that exchanges power with the rotating electrical machine is provided in the housing for the rotating electrical machine (see Patent Document 2). When current flows through the electromagnetic coil and the terminals in the connector, they generate heat. Due to this heat, the conversion efficiency from electrical energy to heat energy or vice versa decreases. Patent Document 2 proposes a cooling structure for avoiding such inconveniences.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, a rotating electrical machine is provided with a rotation parameter detector for detecting rotation parameters such as the rotation speed, rotation angle, and number of rotations of the rotation shaft. When the rotor constituting the rotating electrical machine rotates, vibration occurs. If this vibration affects the rotation parameter detector, there is a concern that the detection result of the rotation parameter may become inaccurate.

[0006] The present invention has been made to solve the above-described problems, and an object thereof is to provide a composite power system including a rotating electrical machine system capable of accurately detecting the rotation parameters of a rotation shaft and facilitating maintenance of the rotation parameter detector.

Means for Solving the Problems

[0007] In order to achieve the above object, according to an embodiment of the present invention, there is provided a rotating electrical machine system having a rotating electrical machine and a housing for the rotating electrical machine that rotatably supports the rotation shaft of the rotating electrical machine, an internal combustion engine having an output shaft that rotates integrally with the rotation shaft, a composite power system comprising: the rotation shaft has a first end portion and a second end portion, and a first bearing and a second bearing are respectively provided between the housing for the rotating electrical machine and the first end portion and the second end portion, whereby the rotation shaft is rotatably supported by the housing for the rotating electrical machine via the first bearing and the second bearing, the first end portion includes a protruding tip that passes through the first bearing and protrudes outside the housing for the rotating electrical machine, a composite power system is provided, in which a rotation parameter detector for detecting the rotation parameters of the rotation shaft is provided at the protruding tip.

[0008] Note that the "rotation parameter detector" is defined as a device that detects parameters related to rotation such as the rotation angle, the number of rotations, and the rotation speed. For example, it may be a device that directly detects the number of rotations or the rotation angle, or a device that obtains the number of rotations by calculation after detecting the rotation angle.

Effects of the Invention

[0009] According to the present invention, a rotational parameter detector for detecting the rotational parameters of a rotating shaft constituting a rotating electrical machine is provided at a protruding tip of the rotating shaft that protrudes from a housing for the rotating electrical machine. In other words, the rotational parameter detector is provided outside the housing that houses the rotating electrical machine. Therefore, it is difficult for the rotational parameter detector to be affected by vibrations generated as the rotating shaft rotates. Therefore, the rotational parameter detector can accurately detect the rotational parameters of the rotating shaft.

[0010] Moreover, since the rotational parameter detector is disposed outside the housing for the rotating electrical machine, maintenance of the rotational parameter detector becomes easier compared to the case where the rotational parameter detector is disposed inside the housing for the rotating electrical machine.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0012] Hereinafter, preferred embodiments of the hybrid power system according to the present invention will be given and described in detail with reference to the accompanying drawings. In the following, "left", "right", "lower", and "upper" refer to the left, right, lower, and upper sides in FIGS. 3 to 5, FIGS. 8, and 9 in particular. This is for the sake of simplicity of explanation and easy understanding, and does not specify the posture when the hybrid power system is actually used.

[0013] FIG. 1 is a schematic overall perspective view of a hybrid power system 300 according to the present embodiment. This hybrid power system 300 includes a rotating electrical machine system 10 and a gas turbine engine 200 which is an internal combustion engine. The gas turbine engine 200 is disposed on the right side in the axial direction of the rotating electrical machine system 10. Also, the axis extending along the longitudinal direction (axial direction) passing through the diameter center of the rotating electrical machine system 10 coincides with the axis extending along the longitudinal direction (axial direction) passing through the diameter center of the gas turbine engine 200.

[0014] In other words, the rotating electrical machine system 10 and the gas turbine engine 200 are arranged in parallel on the same axis. The hybrid power system 300 having such a configuration can be used, for example, as a power source for propulsion in a flying object such as a drone, a ship, an automobile, etc., or as a power source for an auxiliary power supply in an aircraft, a ship, a building, etc. When the hybrid power system 300 is mounted on a flying object such as a multicopter, it functions as a power drive source for rotating and urging a motor constituting a lift generating device such as a propeller or a ducted fan. Also, when mounted on a ship, it functions as a rotational force generating device for a screw, and when mounted on an automobile, it functions as a power drive source for rotating and urging a motor constituting an engine. In addition, it is also possible to apply the hybrid power system 300 to a gas turbine power generation facility. In the present embodiment, the gas turbine engine 200 also serves as a gas supply source for supplying compressed air (gas) described later.

[0015] First, the rotating electrical machine system 10 will be described. FIGS. 2 and 3 are a schematic overall perspective view and a schematic side cross-sectional view of the rotating electrical machine system 10, respectively. This rotating electrical machine system 10 includes a rotating electrical machine 12 (for example, a generator) and a housing 14 for the rotating electrical machine that houses the rotating electrical machine 12. The housing 14 for the rotating electrical machine has a substantially cylindrical shape and includes a main housing 16 with open ends at both the left and right ends, a first sub-housing 18 connected to the left end of the main housing 16, and a second sub-housing 20 connected to the right end.

[0016] The main housing 16 has a substantially cylindrical shape with thick side walls extending along the left-right direction. Inside the side walls, a cooling jacket 21 through which a cooling medium flows is formed. As a specific example of the cooling medium, cooling water can be mentioned. In this case, the cooling jacket 21 is a water jacket. Further, on the outer surface (outer side wall) of the side wall of the main housing 16, near the left end, a terminal casing 22 and a measuring instrument casing 24 are integrally provided with the main housing 16.

[0017] Furthermore, on the outer wall of the side wall of the main housing 16, hollow pipe portions 158a to 158c extending along the longitudinal direction of the main housing 16 (the left-right direction in FIG. 3) are provided. The hollow interiors of the hollow pipe portions 158a to 158c are flow paths for compressed air through which curtain air flows. Also, a detector holding member for holding a rotation parameter detector is connected to the first sub-housing 18. In the present embodiment, a resolver 140 is exemplified as the rotation parameter detector. Therefore, hereinafter, the detector holding member connected to the first sub-housing 18 will be referred to as the "resolver holder 26". A cap cover 28 is screwed onto this resolver holder 26. This will be described in detail later.

[0018] The rotating electrical machine 12 includes a rotor 30 and a stator 32 that surrounds the outer peripheral side of the rotor 30.

[0019] The rotor 30 includes a rotating shaft 40 configured such that the inner shaft 34 is inserted into the outer shaft 36 having a hollow cylindrical shape so as to be insertable and removable. Specifically, the outer shaft 36 is a hollow body having a substantially cylindrical shape, and both ends thereof are open ends. That is, the outer shaft 36 has a left open end 42a (see FIG. 4) and a right open end 42b (see FIG. 5).

[0020] On the other hand, the inner shaft 34 is longer than the outer shaft 36 and has a cylindrical portion 44 with the smallest diameter, a left end portion 46a (see FIG. 4) that is continuous to the left of the cylindrical portion 44 and has a larger diameter than the cylindrical portion 44, and a right end portion 46b (see FIG. 5) that is continuous to the right of the cylindrical portion 44, has a larger diameter than the cylindrical portion 44, and has a smaller diameter than the left end portion 46a. A part of the left end portion 46a of this is projected and exposed from the left open end 42a of the outer shaft 36 and becomes a protruding tip 104 described later. In the illustrated example, the right end portion 46b and the right open end 42b of the outer shaft 36 are flush, but the right end portion 46b may be located slightly deeper from the right open end 42b.

[0021] As shown in detail in FIG. 4, a first external thread portion 48, a flange portion 50, a stopper portion 52, and a second external thread portion 54 are provided in this order from left to right on the left end portion 46a of the inner shaft 34. The outer diameters of the first external thread portion 48, the flange portion 50, the stopper portion 52, and the second external thread portion 54 increase in this order. The outer diameter of the second external thread portion 54 is set to be larger than the inner diameter of the outer shaft 36. Therefore, the right end of the second external thread portion 54 is blocked by the edge of the left open end 42a of the outer shaft 36. As a result, the left side of the inner shaft 34 from the second external thread portion 54 is prevented from being inserted into the outer shaft 36.

[0022] The resolver rotor 56 is mounted on the flange portion 50, and the small cap nut 58 is screwed onto the first external thread portion 48. The resolver rotor 56 is positioned and fixed to the flange portion 50 by having its right end blocked by the stopper portion 52 and its left end pressed by the small cap nut 58. Also, a large cap nut 60 is screwed onto the second external thread portion 54. The skirt portion 61 of the large cap nut 60 covers the outer peripheral wall of the left opening end 42a of the outer shaft 36. Thereby, the left end portion 46a of the inner shaft 34 is restrained by the left opening end 42a of the outer shaft 36. Note that both the first external thread portion 48 and the second external thread portion 54 are so-called reverse threads. Therefore, the small cap nut 58 and the large cap nut 60 are rotated counterclockwise when being screwed. Also, by deforming a part of the threads of the small cap nut 58 and the large cap nut 60, it is prevented that the small cap nut 58 and the large cap nut 60 become looser than when being screwed.

[0023] As shown in FIG. 5, on the right end portion 46b of the inner shaft 34, a shaft connection hole 62 is formed so as to extend toward the left end portion 46a side. A female thread portion 64 is engraved on the inner peripheral wall of the shaft connection hole 62. Also, on the outer peripheral wall of the right opening end 42b of the outer shaft 36, a first inner peripheral side spline 66 (inner peripheral side engaging portion) extending along the left - right direction is formed.

[0024] The second sub - housing 20 having a substantially disc shape is connected to the main housing 16 via bolts (not shown). The center of the second sub - housing 20 is a thick - walled cylindrical portion, and a large - diameter insertion hole 68 is formed in the cylindrical portion. A second bearing 94 (described later) is inserted into this insertion hole 68. The second bearing 94 is positioned and fixed while being sandwiched between an inner stopper 70 and an outer stopper 71.

[0025] As shown in Fig. 2, an annular recess 72 is formed on the end face of the second sub-housing 20 facing the gas turbine engine 200, and an annular collecting flow path 74 is formed in the annular recess 72. As will be described later, a part of the compressed air generated in the gas turbine engine 200 is diverted and flows through the collecting flow path 74. Three upstream communication holes 76 are formed in the bottom wall of the annular recess 72.

[0026] Also, a relay connection passage 78 shown in Fig. 6 is provided inside the second sub-housing 20. The relay connection passage 78 extends radially along the diameter direction of the second sub-housing 20 and communicates with the collecting flow path 74 through the upstream communication holes 76 on the outer side in the diameter direction. Further, three downstream communication holes 80a to 80c are formed on the end face of the second sub-housing 20 facing the rotating electric machine 12. The downstream communication holes 80a to 80c are the downstream openings of the relay connection passage 78. The three downstream communication holes 80a to 80c individually open into the respective hollow pipe portions 158a to 158c. As can be understood from this, the relay connection passage 78 communicates the collecting flow path 74 with the hollow interiors (compressed air flow paths) of the hollow pipe portions 158a to 158c. A distribution path is formed by the collecting flow path 74 and the relay connection passage 78.

[0027] As shown in Fig. 5, a rectifying member 82 is connected to the end face (one end portion in the axial direction) of the second sub-housing 20 on the side facing the gas turbine engine 200 so as to protrude toward the gas turbine engine 200 side. The rectifying member 82 is formed of a mountain-shaped body or a bottomless cup-shaped body having an annular shape with a large diameter and a thin wall at the skirt facing the second sub-housing 20 side and an annular shape with a small diameter and a thick wall at the top facing the gas turbine engine 200. And the side peripheral wall 83 between the skirt and the top is a smooth surface with a small surface roughness.

[0028] Also, the diameter (opening diameter) of the insertion hole 84 on the top side is set to be larger than the outer diameter of the outer stopper 71. For this reason, the right end of the outer stopper 71 that has entered the insertion hole 84 does not interfere with the inner wall of the insertion hole 84. In other words, a gap is formed between the outer peripheral wall of the outer stopper 71 and the inner wall of the insertion hole 84.

[0029]

[0029] The left end of the output shaft 250 is inserted into the shaft coupling hole 62 formed in the inner shaft 34. The output shaft 250 is coupled to the inner shaft 34 by screwing as will be described later. Note that the output shaft 250 supports the compressor wheel 230 and the turbine wheel 232 that constitute the gas turbine engine 200 (see FIG. 8).

[0030] As shown in FIG. 3, the substantially middle portion in the longitudinal direction of the outer shaft 36 has the maximum outer diameter, and a plurality of permanent magnets 88 are held by a magnet holder 90 at this large-diameter portion. Adjacent permanent magnets 88 are arranged adjacent to each other, and adjacent ones have different polarities facing the outer peripheral side. Each permanent magnet 88 orbits around the rotation center of the rotation shaft 40 as the rotation shaft 40 rotates.

[0031] The left end (first end portion) of the rotation shaft 40 is rotatably supported by the first sub-housing 18 via the first bearing 92. Also, the right end (second end portion) of the rotation shaft 40 is rotatably supported by the second sub-housing 20 via the second bearing 94. Here, as shown in FIG. 3, in the present embodiment, the first bearing 92 is interposed between the outer shaft 36 and the first sub-housing 18. Also, the second bearing 94 is interposed between the outer shaft 36 and the second sub-housing 20 via the inner stopper 70.

[0032] That is, the first sub-housing 18 has a columnar protrusion 96 that protrudes toward the main housing 16 and has a substantially cylindrical shape, and a first shaft insertion hole 98 is formed in the columnar protrusion 96. The first bearing 92 is provided in the first shaft insertion hole 98.

[0033] The left opening of the first shaft insertion hole 98 is closed by a disk member 102 in which a second shaft insertion hole 100 connected to the first shaft insertion hole 98 is formed. Although detailed illustration is omitted, the outer peripheral wall of the left opening end 42a of the outer shaft 36 and the inner peripheral walls of the first shaft insertion hole 98 and the second shaft insertion hole 100 are slightly spaced apart from each other. Further, the skirt portion 61 of the large cap nut 60 is slightly spaced from the left end surface of the disk member 102.

[0034] The tip of the left end portion of the rotating shaft 40 is passed through the inner hole of the first bearing 92, passes through the first shaft insertion hole 98 and the second shaft insertion hole 100, and is exposed so as to protrude outside the first sub-housing 18. Hereinafter, the portion of the rotating shaft 40 protruding from the left end of the first bearing 92 is referred to as a protruding tip, and its reference numeral is 104. The protruding tip 104 includes a first external thread portion 48, a flange portion 50, a stopper portion 52, and a second external thread portion 54 in the left end portion 46a of the inner shaft 34 (see FIG. 4). On the other hand, the right end of the rotating shaft 40 is passed through the inner hole of the second bearing 94 and protrudes together with the outer stopper 71 from the insertion hole 68 formed in the second sub-housing 20 (see FIG. 5).

[0035] As shown in FIG. 3, the first shaft insertion hole 98 and the circulation hole 106 formed in the inner stopper 70 communicate with a storage chamber 114 (described later) which is an internal space of the main housing 16. For this reason, the first bearing 92 and the second bearing 94 are exposed to the storage chamber 114. Needless to say, the second shaft insertion hole 100 communicates with the storage chamber 114 via the first shaft insertion hole 98.

[0036] In the present embodiment, the first bearing 92 and the second bearing 94 are of a so-called jet lubrication type that is lubricated and cooled by lubricating oil supplied in a jet flow state. Note that the present invention is not particularly limited thereto, and a spray lubrication type in which oil mist is sprayed or a circulation lubrication type may be used. Such a lubrication method bearing is known, and therefore, detailed illustration and description are omitted.

[0037] The stator 32 that constitutes the rotating electrical machine 12 together with the rotor 30 described above has an electromagnetic coil 116 and a plurality of insulating base materials 118 around which the electromagnetic coil 116 is wound. The electromagnetic coil 116 among these has three types: a U-phase coil, a V-phase coil, and a W-phase coil. That is, when the rotating electrical machine 12 is a generator, the rotating electrical machine 12 is a so-called three-phase power source. Note that the plurality of insulating base materials 118 are arranged in an annular shape, and thereby, an inner hole is formed in the stator 32.

[0038] The stator 32 is housed in a housing chamber 114 formed in the main housing 16. Here, the second sub-housing 20 serves as a stator holder. That is, the insulating base material 118 that constitutes the stator 32 is engaged with an annular recess 122 formed in the second sub-housing 20. By this engagement, the stator 32 is positioned and fixed. Further, the cylindrical protrusion 96 enters the inner hole of the stator 32 from its left opening.

[0039] Although detailed illustration is omitted, the inner wall of the housing chamber 114 and the electromagnetic coil 116 are slightly separated. Due to this separation, the main housing 16 and the electromagnetic coil 116 are electrically insulated.

[0040] Note that a clearance is formed between the outer peripheral wall of the cylindrical protrusion 96 and the insulating base material 118, and between the outer wall of the permanent magnet 88 and the inner wall of the electromagnetic coil 116 by a slight separation between the two. As will be described later, this clearance becomes a part of a flow path through which curtain air, which is a gas, flows.

[0041] As shown in FIG. 4, the first sub-housing 18 has an annular convex portion 124 that protrudes in an annular shape. The inner side of the annular convex portion 124 is a hollow recess 126. The protruding tip 104 that constitutes the left end portion 46a of the inner shaft 34 enters the hollow recess 126.

[0042] The annular convex portion 124 is provided with a resolver holder 26 that holds the resolver stator 130. This resolver holder 26 has a flange-shaped stopper 132 that protrudes outward in the diameter direction. This flange-shaped stopper 132 is set to have a larger diameter than the inner diameter of the annular convex portion 124. Therefore, the resolver holder 26 is positioned when the flange-shaped stopper 132 abuts against the annular convex portion 124. In this state, the resolver holder 26 is connected to the first sub-housing 18 via, for example, mounting bolts (not shown).

[0043] The resolver holder 26 is provided with a small cylindrical portion 134 facing leftward and a large cylindrical portion 136 facing rightward and having a larger diameter than the small cylindrical portion 134 with the flange-shaped stopper 132 as a boundary. A holding hole 138 is formed in the resolver holder 26, and the resolver stator 130 is held by fitting the right end thereof into the holding hole 138. When the large cylindrical portion 136 enters the hollow recess 126 and the flange-shaped stopper 132 abuts against the annular convex portion 124, a resolver rotor 56 held by the flange portion 50 at the left end portion 46a of the inner shaft 34 is positioned in the inner hole of the resolver stator 130. These resolver stator 130 and resolver rotor 56 constitute a resolver 140 as a rotation parameter detector. In the present embodiment, a case where the rotation angle is detected by the resolver 140 is illustrated.

[0044] A receiver connector 144 is fitted into a fitting hole 142 formed in the flange-shaped stopper 132. The resolver stator 130 and the receiver connector 144 are electrically connected via a signal line 146. A receiver-side connector of a receiver (not shown) that receives the signal emitted by the resolver 140 is inserted into the receiver connector 144. The resolver 140 and the receiver are electrically connected via the receiver connector 144 and the receiver-side connector.

[0045] The small cylindrical portion 134 is provided with a plurality of tab portions 148 (omitted in FIG. 1). One of them is shown in FIG. 3. Further, the small cylindrical portion 134 is covered with a cap cover 28 that closes the left opening of the small cylindrical portion 134 and shields the left end portion 46a of the inner shaft 34. The cap cover 28 is connected to the tab portion 148 via a connecting bolt 150.

[0046] As described above, a terminal casing 22 and a measuring instrument casing 24 are integrally provided on the side wall near the left end of the main housing 16. Among them, a thermistor 152, which is a temperature measuring instrument, is housed in the measuring instrument casing 24. Although not particularly shown, the measurement terminals of the thermistor 152 are drawn out from the measuring instrument casing 24 and connected to the electromagnetic coil 116. A harness 154 connected to the thermistor 152 is drawn out from the measuring instrument casing 24 to the outside.

[0047] The terminal casing 22 adjacent to the measuring instrument casing 24 houses a U-phase terminal 156a, a V-phase terminal 156b, and a W-phase terminal 156c that are electrically connected to the ends of the U-phase coil, V-phase coil, and W-phase coil, respectively. In other words, the terminal casing 22 is an external device connection connector to which a battery 170 (see FIG. 7), which is an external power source electrically connected to the rotating electric machine 12, is electrically connected, and the U-phase terminal 156a, the V-phase terminal 156b, and the W-phase terminal 156c are electrical terminal portions that supply power to the battery 170. The internal space of the measuring instrument casing 24 and the internal space of the terminal casing 22 communicate with each other through a casing-to-casing communication hole (not shown).

[0048] As shown in FIG. 2, the hollow tube portions 158a to 158c provided on the outer surface of the side wall of the main housing 16 are located outside the cooling jacket 21 formed inside the side wall of the main housing 16. That is, the hollow tube portions 158a to 158c are adjacent to the cooling jacket 21, for example. Here, in the present embodiment, the case where three hollow tube portions 158a to 158c are provided is illustrated, but the number of hollow tube portions is appropriately set according to the required flow rate and flow velocity of the air for the curtain. That is, the number of hollow tube portions is not particularly limited to three. Also, the cross-sectional area of the hollow tube portion may be similarly set appropriately according to the required flow rate and flow velocity of the air for the curtain.

[0049] Here, the right ends of the hollow tube portions 158a to 158c individually overlap with three downstream communication holes 80a to 80c (see FIG. 6) formed in the second sub-housing 20. That is, the collective flow path 74 communicates with the hollow interiors of the hollow tube portions 158a to 158c via the upstream communication hole 76, the relay communication path 78, and the downstream communication holes 80a to 80c. On the other hand, the left end of the hollow tube portion 158a communicates with the hollow interior of the casing 24 for the measuring instrument, and the left ends of the hollow tube portions 158b and 158c communicate with the hollow interior of the terminal casing 22.

[0050] The air for the curtain flows through the collective flow path 74 as the upstream side and the measuring instrument casing 24 and the terminal casing 22 as the downstream side. In this way, the hollow tube portions 158a to 158c are part of the flow path for the compressed air through which the air for the curtain flows. Note that the air for the curtain is part of the compressed air supplied from the gas turbine engine 200.

[0051] As shown in FIG. 3, the internal space of the terminal casing 22 communicates with the storage chamber 114. Therefore, the air for the curtain that has flowed into the internal space of the terminal casing 22 can flow into the storage chamber 114 and come into contact with the first bearing 92 and the second bearing 94.

[0052] As shown in FIGS. 1 and 2, a current converter 172 is provided on the outer peripheral wall of the main housing 16 closer to the gas turbine engine 200 side than the terminal casing 22. As shown in FIG. 7, the current converter 172 includes a conversion circuit 174, a capacitor 176, and a control circuit 178. These conversion circuit 174, capacitor 176, and control circuit 178 are housed in the equipment case 180. The equipment case 180 is arranged, for example, at a location on the outer peripheral wall of the main housing 16 that does not interfere with the hollow tube portions 158a to 158c (see FIG. 1).

[0053] The conversion circuit 174 is configured to include a power module 182 and has a function of converting the alternating current generated in the electromagnetic coil 116 into a direct current. Further, the capacitor 176 temporarily stores the direct current converted by the conversion circuit 174 as electric charge. The conversion circuit 174 also has a function of converting the direct current sent from the battery 170 into an alternating current. In this case, the capacitor 176 temporarily stores the direct current sent from the battery 170 toward the electromagnetic coil 116 as electric charge. The control circuit 178 controls the current density and the like of the direct current flowing from the capacitor 176 to the battery 170 or the direct current flowing from the battery 170 to the capacitor 176. The direct current from the battery 170 is supplied to a motor (not shown) via, for example, an AC-DC converter.

[0054] As shown in FIG. 7, in this case, the equipment case 180 is positioned and fixed so as to be in contact with the outer peripheral wall of the main housing 16. Inside the equipment case 180, the conversion circuit 174 and the capacitor 176 are arranged so as to be close to the main housing 16. Since the main housing 16 is provided with the cooling jacket 21 as described above, the conversion circuit 174 and the capacitor 176 are sufficiently close to the cooling jacket 21.

[0055] Next, the gas turbine engine 200 will be described. As shown in FIG. 8, the gas turbine engine 200 includes an engine housing 206 including an inner housing 202 connected to the second sub-housing 20 of the rotary electric machine system 10, and an outer housing 204 connected to the inner housing 202.

[0056] As shown in FIGS. 1 and 6, the inner housing 202 has a first annular portion 208 connected to the second sub-housing 20, a second annular portion 210 having the largest diameter, and a plurality (for example, six) of leg portions 212 connecting the first annular portion 208 and the second annular portion 210. Further, from the central opening of the second annular portion 210, a cylindrical cover portion 214 projects toward the rotary electric machine system 10 side. Note that the number of the leg portions 212 is appropriately set according to the coupling strength required between the gas turbine engine 200 and the rotary electric machine system 10. That is, the number of the leg portions 212 is not particularly limited to six in the illustrated example.

[0057] The right ends of the leg portions 212 are continuous with both the second annular portion 210 and the cylindrical cover portion 214. Thereby, support rigidity is provided to the leg portions 212. And at the connection portion of the leg portions 212 with the cylindrical cover portion 214, an inlet opening of the air extraction passage 216 is formed. Further, as shown in FIG. 8, inside the leg portions 212 and inside the first annular portion 208, air extraction passages 216 communicating with the air extraction ports 220 formed in the shroud case 218 are individually formed. The outlet openings of the air extraction passages 216 are individually formed on the end face of the first annular portion 208 on the side facing the second sub-housing 20. The outlet openings overlap the collective flow path 74. That is, all of the plurality of air extraction passages 216 communicate with the collective flow path 74. In this way, in the collective flow path 74, compressed air from the plurality of air extraction passages 216 flows in and converges.

[0058] As shown in FIG. 8, the gas turbine engine 200 further includes an inner housing 202, a shroud case 218 housed inside an outer housing 204, a compressor wheel 230, a turbine wheel 232, a diffuser 234, a combustor 236, and a nozzle 238. In the present embodiment, the compressor wheel 230 and the turbine wheel 232 are separate members.

[0059] The shroud case 218 is a hollow body having a substantially similar shape to the fairing member 82 and is larger than the fairing member 82. The left end with a small diameter faces the fairing member 82, and the right end with a large diameter is inserted into the inner housing 202. The left end of the shroud case 218 is exposed to the intake space 240 formed between the legs 212 of the inner housing 202. The top, which is the right end of the fairing member 82, enters the inside of this left end. Note that the shroud case 218 gradually decreases in diameter from the right end toward the left end, but the tip of the left end is curved so as to expand outward in the diameter direction.

[0060] The compressor wheel 230 is housed inside the shroud case 218. In other words, the shroud case 218 surrounds the compressor wheel 230. However, the compressor wheel 230 and the shroud case 218 are spaced apart from each other.

[0061] The compressor wheel 230 and the turbine wheel 232 are capable of rotating integrally with the rotating shaft 40. That is, as shown in detail in FIG. 5, the compressor wheel 230 has a small-diameter cylindrical portion 242 (hollow cylindrical shape portion) at the left end. The small-diameter cylindrical portion 242 enters an insertion hole 84 formed at the top of the rectifying member 82. On the inner wall of the small-diameter cylindrical portion 242, a first outer peripheral side spline 85 (outer peripheral side engaging portion) composed of a plurality of teeth extending radially inward and provided annularly is formed. The first outer peripheral side spline 85 meshes with a first inner peripheral side spline 66 formed on the outer peripheral wall of the right opening end 42b of the outer shaft 36. The outer shaft 36 is press-fitted into the hollow interior of the small-diameter cylindrical portion 242. Therefore, the inner peripheral wall of the left opening of the small-diameter cylindrical portion 242 presses the outer peripheral wall of the right opening end 42b of the outer shaft 36 inward. The compressor wheel 230 is connected to the outer shaft 36, and thus to the rotating shaft 40, by the above-described meshing and press-fitting.

[0062] An axial hole 244 extending along the left-right direction is formed at the diameter center of the compressor wheel 230. In this axial hole 244, a second outer peripheral side spline 246 (outer peripheral side tooth portion) composed of a plurality of teeth extending radially inward and provided annularly is engraved on the inner wall near the left end. Also, the hole diameter of the portion of the axial hole 244 that is continuous with the hollow interior of the small-diameter cylindrical portion 242 is set to be slightly smaller than that of other portions. For this reason, an inner flange portion 248 is provided near the opening of the axial hole 244 on the small-diameter cylindrical portion 242 side of the compressor wheel 230. At the portion where the inner flange portion 248 is provided, the hole diameter (diameter) of the axial hole 244 is the smallest.

[0063] The output shaft 250 provided on the turbine wheel 232 is inserted into this shaft hole 244. The left end tip of the output shaft 250 extends to a position substantially the same as the left end tip of the small-diameter cylindrical portion 242 of the compressor wheel 230. As described above, the outer peripheral wall of the right opening end 42b of the outer shaft 36 is inserted into the hollow interior of the small-diameter cylindrical portion 242. Therefore, the left end of the output shaft 250 protruding from the shaft hole 244 enters the shaft connection hole 62 of the rotating shaft 40. A male screw portion 252 is engraved on the left end of the output shaft 250, and the male screw portion 252 is screwed into a female screw portion 64 formed on the inner wall of the shaft connection hole 62. By this screwing, the rotating shaft 40 and the output shaft 250 are connected.

[0064] A second inner peripheral side spline 254, which is an inner peripheral side tooth portion, is formed near the left end of the output shaft 250. The second inner peripheral side spline 254 meshes with a second outer peripheral side spline 246 formed on the inner peripheral wall of the shaft hole 244 of the compressor wheel 230. Further, the left end portion of the output shaft 250 is passed through the inner flange portion 248 by press-fitting.

[0065] As shown in FIG. 8, a ring member 256 made of a heat-resistant metal material such as a nickel-based alloy is interposed between the compressor wheel 230 and the turbine wheel 232. As shown in FIG. 9, a fitting hole 258 extending from the compressor wheel 230 toward the turbine wheel 232 is formed in the ring member 256. Further, a plurality (for example, three) of labyrinth convex portions 264 are formed on the outer peripheral wall of the ring member 256. The labyrinth convex portions 264 project outward in the diameter direction of the ring member 256 and circulate along the circumferential direction of the outer peripheral wall. As will be described later, the labyrinth convex portions 264 can prevent the backflow of the burned fuel (exhaust gas) generated in the combustor 236 to the compressor wheel 230.

[0066] From the right end face of the compressor wheel 230 facing the turbine wheel 232, an annular protrusion 268 projects. When the left end face of the ring member 256 seats on the right end face of the compressor wheel 230, the annular protrusion 268 is fitted into the fitting hole 258. On the other hand, from the left end face of the turbine wheel 232 facing the compressor wheel 230, the output shaft 250 extends. Further, on the left end face, a fitting convex portion 270 that circumscribes the output shaft 250 is formed to project. When the right end face of the ring member 256 seats on the left end face of the turbine wheel 232, the top surface of the fitting convex portion 270 is fitted into the fitting hole 258. Thus, a part of each of the compressor wheel 230 and the turbine wheel 232 is fitted into the fitting hole 258. The ring member 256 is sandwiched between the two wheels 230 and 232 in this state.

[0067] On the other hand, the labyrinth convex portion 264 is surrounded by the intermediate plate 266 inside the hollow interior of the outer housing 204 (see FIG. 8) and is inserted into a hole portion 272 formed in the intermediate plate 266. A labyrinth flow path is formed by the inner wall of the hole portion 272 and the labyrinth convex portion 264 in contact therewith. The compressed air generated by the compressor wheel 230 reaches the labyrinth convex portion 264 via the back surface of the compressor wheel 230. On the other hand, combustion gas reaches the labyrinth convex portion 264 from the turbine wheel 232 side. Since the pressure of the compressed air is set higher than the pressure of the combustion gas, it is possible to suppress the combustion gas from passing through the labyrinth convex portion 264 and flowing into the compressor wheel 230 side.

[0068] As shown in FIG. 8, within the hollow interior of the outer housing 204, the shroud case 218 and the compressor wheel 230 at their maximum diameter portions, and the intermediate plate 266 are surrounded by the diffuser 234. Further, the turbine wheel 232 is surrounded by the nozzle 238, and the nozzle 238 is surrounded by the combustor 236. An annular combustion air flow passage 273 through which combustion air flows is formed between the combustor 236 and the outer housing 204. On the other hand, a fuel supply nozzle 274 for supplying fuel to the combustor 236 is positioned and fixed on the right end face of the outer housing 204.

[0069] Here, a relay hole 276 for communicating the combustion air flow passage 273 with the interior of the combustor 236 is formed in the combustor 236. Also, fine holes (not shown) for forming an air curtain for cooling the interior of the combustor 236 are formed in the combustor 236. As will be described later, the combustion air compressed by the compressor wheel 230 reaches the interior of the combustor 236 via the diffuser 234, the combustion air flow passage 273, and the relay hole 276. Further, in the nozzle 238, a delivery hole (not shown) for supplying the fuel burned together with the combustion air (hereinafter also referred to as "burned fuel". "Burned fuel" is synonymous with "combustion gas" or "exhaust gas after combustion") to the turbine wheel 232 is formed at a portion surrounding the largest diameter portion of the turbine wheel 232.

[0070] Also, at the right ends of the outer housing 204 and the nozzle 238, an outlet 280 is open where an exhaust pipe (not shown) for discharging the burned fuel is provided. The burned fuel travels into the nozzle 238 through the delivery hole, and then is blown out of the outer housing 204 through the outlet 280 under the action of the rotating turbine wheel 232.

[0071] The combined power system 300 according to the present embodiment is basically configured as described above, and next, its operation and effects will be described.

[0072] In this embodiment, the rotating electrical machine system 10 constitutes a combined power system 300 together with the gas turbine engine 200. For this reason, as shown in FIG. 5, the output shaft 250 is connected to the rotating shaft 40. Here, a shaft connection hole 62 is formed at the right end portion 46b of the inner shaft 34 constituting the rotating shaft 40, and a female screw portion 64 is engraved on the inner peripheral wall of the shaft connection hole 62. Further, a male screw portion 252 is engraved at the left end of the output shaft 250, and the left end is inserted into the shaft connection hole 62, and the male screw portion 252 is screwed into the female screw portion 64.

[0073] In this way, since one end portion of the output shaft 250 is inserted into the shaft connection hole 62 formed at one end portion of the rotating shaft 40, the lengths of the rotating shaft 40 and the output shaft 250 after being connected to each other are smaller than the sum of the lengths of the two shafts 40 and 250. Further, since the output shaft 250 is inserted into the shaft connection hole 62 of the rotating shaft 40, the diameter of the output shaft 250 is set smaller than the diameter of the shaft connection hole 62. Therefore, the output shaft 250 is small and lightweight. For the above reasons, the combined power system 300 can be reduced in size and weight.

[0074] Then, connection terminals of the battery 170 (see FIG. 7), which is an external power source, are connected to the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c in the terminal casing 22. In this state, a direct current is supplied from the battery 170. The conversion circuit 174 of the current converter 172 shown in FIGS. 2 and 7 converts this direct current into an alternating current and supplies it to the electromagnetic coils 116 (U-phase coil, V-phase coil, W-phase coil) via the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c. When this alternating current flows through the electromagnetic coil 116, an alternating magnetic field is generated in the stator 32. For this reason, an attractive force and a repulsive force act alternately between the electromagnetic coil 116 and the permanent magnet 88 of the rotor 30. As a result, the rotating shaft 40 starts to rotate. Of course, it is also possible to rotate the rotating shaft 40 by a known starter (not shown).

[0075] Here, as shown in FIG. 5, a first inner peripheral side spline 66 is formed on the outer peripheral wall of the right opening end 42b of the outer shaft 36 that constitutes the rotating shaft 40, and a first outer peripheral side spline 85 is formed on the inner wall of the small diameter cylindrical portion 242 of the compressor wheel 230. The first inner peripheral side spline 66 and the first outer peripheral side spline 85 are engaged with each other. Further, a second inner peripheral side spline 254 is formed on the output shaft 250, and a second outer peripheral side spline 246 is formed on the inner wall of the shaft hole 244 of the compressor wheel 230. The second inner peripheral side spline 254 and the second outer peripheral side spline 246 are also engaged with each other. Therefore, the rotational torque of the rotating shaft 40 is quickly transmitted to the output shaft 250 via the compressor wheel 230.

[0076] That is, when the rotating shaft 40 starts to rotate, the output shaft 250 also starts to rotate integrally therewith. Along with this, the compressor wheel 230 and the turbine wheel 232 supported by the output shaft 250 rotate integrally with the output shaft 250. As described above, by providing the first inner peripheral side spline 66 which is an inner peripheral side engaging portion, the first outer peripheral side spline 85 which is an outer peripheral side engaging portion, the second inner peripheral side spline 254 which is an inner peripheral side tooth portion, and the second outer peripheral side spline 246 which is an outer peripheral side tooth portion, and engaging the first inner peripheral side spline 66 with the first outer peripheral side spline 85 and the second inner peripheral side spline 254 with the second outer peripheral side spline 246 respectively, the rotational torque of the rotating shaft 40 can be sufficiently transmitted to the output shaft 250.

[0077] Moreover, the right end portion of the rotating shaft 40 is press-fitted into the hollow interior of the small diameter cylindrical portion 242 of the compressor wheel 230, and the left end portion of the output shaft 250 is passed through the inner flange portion 248 of the compressor wheel 230 by press-fitting. Therefore, the axis of the rotating shaft 40 and the axis of the output shaft 250 coincide accurately. As a result, it is sufficiently suppressed that the output shaft 250 rotates eccentrically or vibrates.

[0078] In addition, as shown in FIG. 9, a ring member 256 is interposed between the compressor wheel 230 and the turbine wheel 232. An annular protrusion 268 on the right end face of the compressor wheel 230 and a fitting protrusion 270 on the left end face of the turbine wheel 232 are respectively fitted into the fitting holes 258 of the ring member 256. These fittings also contribute to suppressing the eccentric rotation (vibration) of the output shaft 250. Therefore, it is not necessary to provide a mechanism for suppressing vibration or to make the output shaft 250 have a large diameter. As a result, the composite power system 300 can be downsized.

[0079] Furthermore, frictional forces are generated between the right end face of the compressor wheel 230 and the left end face of the ring member 256, and between the right end face of the ring member 256 and the left end face of the turbine wheel 232, respectively. Due to this frictional force, the compressor wheel 230, the ring member 256, and the turbine wheel 232 are in close contact with each other. Therefore, it is avoided that the two wheels 230 and 232 cause a rotational displacement.

[0080] Moreover, when assembling the composite power system 300, the above fittings align (center) the compressor wheel 230 and the turbine wheel 232 with respect to the output shaft 250. As can be understood from this, by providing the ring member 256 between the two wheels 230 and 232 and fitting a part of each of the two wheels 230 and 232 into the fitting holes 258 of the ring member 256 individually, it becomes easy to center the compressor wheel 230 and the turbine wheel 232 with respect to the output shaft 250.

[0081] Then, due to the above rotation, as shown in FIG. 8, air is sucked from the intake space 240 between the legs 212 of the inner housing 202 into the shroud case 218. Here, a rectifying member 82 is located at the diameter center of the inner housing 202. As described above, the rectifying member 82 has a mountain shape that tapers in diameter toward the shroud case 218, and moreover, the side peripheral wall 83 is smooth. Therefore, the sucked air is rectified by the rectifying member 82 to flow toward the shroud case 218. Since the right end of the rectifying member 82 enters from the left end opening of the shroud case 218, air efficiently enters the shroud case 218. Thus, by forming the rectifying member 82 in the above shape and allowing its tip to enter the shroud case 218, air can be efficiently collected by the shroud case 218.

[0082] The air sucked into the shroud case 218 flows between the compressor wheel 230 and the shroud case 218. Since the space between the compressor wheel 230 and the shroud case 218 is sufficiently narrow compared to the left opening of the shroud case 218, the air is compressed during this flow. That is, compressed air is generated.

[0083] An air extraction port 220 is formed near the right end (hem) of the shroud case 218. On the other hand, the base ends of the legs 212 of the inner housing 202 are located on the outer peripheral side of the substantially middle portion in the left-right direction of the shroud case 218. An inlet opening of the air extraction passage 216 is formed at this base end. Therefore, a part of the compressed air is diverted as curtain air from the air extraction port 220 and proceeds to the second sub-housing 20 through the air extraction passage 216 formed in the leg 212. As shown in FIG. 6, the curtain air flows into and converges in the collective flow path 74 from the outlet opening of the air extraction passage 216 and diffuses in an annular shape. The curtain air further flows from the collective flow path 74 through the upstream side communication hole 76, is distributed and flows into the relay connection passage 78, and then flows through the hollow interiors of the hollow tube portions 158a to 158c shown in FIG. 1 etc. from each of the three downstream side communication holes 80a to 80c.

[0084] The hollow tube portions 158a to 158c are located on the outer peripheral side of the cooling jacket 21. Therefore, in the process of the curtain air flowing along the hollow tube portions 158a to 158c, the heat of the curtain air is sufficiently conducted to the cooling medium previously supplied to the cooling jacket 21. As a result, the curtain air becomes relatively low in temperature. That is, in the present embodiment, the cooling jacket 21 for cooling the rotating electric machine 12 and the current converter 172 can cool the curtain air. For this reason, it is not necessary to separately provide cooling equipment for cooling the curtain air in the gas turbine engine 200 and the rotating electric machine system 10. In this regard, the composite power system 300 can be downsized.

[0085] The curtain air that has flowed through the hollow tube portion 158a flows into the internal space of the measuring instrument casing 24 as shown in FIG. 2. As a result, an air curtain is formed in the measuring instrument casing 24. The surplus curtain air flows into the hollow interior (internal space) of the terminal casing 22 through the casing - to - casing communication hole. The surplus curtain air and the curtain air that has flowed through the hollow tube portions 158b and 158c and flowed into the internal space of the terminal casing 22 form an air curtain in the terminal casing 22.

[0086] The surplus curtain air in the terminal casing 22 flows into the storage chamber 114 formed in the main housing 16 as shown in FIG. 3. Here, since the terminal casing 22 and the measuring instrument casing 24 are disposed on the left side of the main housing 16, the curtain air flows in from the left end of the storage chamber 114. The curtain air then first enters the inner hole of the stator 32, that is, the clearance between the outer peripheral wall of the columnar protrusion 96 and the insulating base material 118.

[0087] Part of the air for the curtain then goes toward the first shaft insertion hole 98 side. The remaining part flows along the clearance between the outer wall of the permanent magnet 88 and the inner wall of the electromagnetic coil 116, that is, toward the insertion hole 68 side along the storage chamber 114. Thus, the air for the curtain branches into a portion heading toward the first shaft insertion hole 98 at the left end (first end) and a portion heading toward the insertion hole 68 at the right end (second end). As understood from the above, the flow path of the air for the curtain has the internal spaces of the terminal casing 22 and the measuring instrument casing 24 as the upstream side and the storage chamber 114 of the main housing 16 as the downstream side.

[0088] The air for the curtain that has flowed to the first shaft insertion hole 98 side passes through the first bearing 92 disposed in the first shaft insertion hole 98. On the other hand, the air for the curtain that has flowed to the insertion hole 68 side passes through the second bearing 94 disposed in the insertion hole 68. Both the air for the curtain containing lubricating oil then are discharged to an oil tank (both not shown) via, for example, a lubricating discharge path and separated into lubricating oil and air. The lubricating oil is re-supplied to the first bearing 92 and the second bearing 94. On the other hand, the air is discharged to the atmosphere, for example.

[0089] The compressed air that has passed between the shroud case 218 and the compressor wheel 230 without entering the air extraction port 220 becomes combustion air and proceeds into the diffuser 234 as shown in FIG. 8. The combustion air flows out from the outlet hole formed in the wall portion of the diffuser 234 into the combustion air flow path 273 between the combustor 236 and the outer housing 204. The combustion air further enters the hollow interior of the combustor 236, that is, the combustion chamber, through the relay hole 276 formed in the combustor 236, the micropores, and further through the clearance between the combustor 236 and the fuel supply nozzle 274, etc.

[0090] The combustor 236 is preheated, and fuel is supplied from the fuel supply nozzle 274 into its hollow interior (combustion chamber). The fuel burns together with the combustion air and becomes high-temperature burned fuel. When this burned fuel is supplied into the nozzle 238 from the delivery hole and expands in the nozzle 238, the turbine wheel 232 starts to rotate at high speed. Since the output shaft 250 is provided on the turbine wheel 232 and the compressor wheel 230 is externally fitted to the output shaft 250, as the turbine wheel 232 rotates at high speed, the output shaft 250 and the compressor wheel 230 rotate integrally at high speed. The burned fuel is discharged outside the outer housing 204 through a discharge pipe (not shown) provided at the discharge port 280.

[0091] The ring member 256 interposed between the compressor wheel 230 and the turbine wheel 232 also serves as a sealing member for sealing between the two wheels 230 and 232. Moreover, as shown in FIG. 9, a plurality of labyrinth convex portions 264 are formed on the outer peripheral wall of the ring member 256, and the labyrinth convex portions 264 are in contact with the inner wall of the hole portion 272 formed in the intermediate plate 266 (see FIG. 9). The compressed air generated by the compressor wheel 230 reaches the labyrinth convex portions 264 via the back surface of the compressor wheel 230. Also, combustion gas reaches the labyrinth convex portions 264 from the turbine wheel 232 side. As described above, the pressure of the compressed air is set higher than the pressure of the combustion gas. For this reason, it is suppressed that the combustion gas passes through the labyrinth convex portions 264 and flows into the compressor wheel 230 side. For the above reasons, it is avoided that the burned fuel enters the shaft hole 244, for example, from between the two wheels 230 and 232.

[0092] In FIG. 8, when the output shaft 250 starts high-speed rotation, the supply of current from the battery 170 (see FIG. 7) to the electromagnetic coil 116 is stopped. However, as described above, since the turbine wheel 232 is rotating at high speed due to the burned fuel, the output shaft 250 rotates integrally with the turbine wheel 232, and the rotating shaft 40 rotates integrally. Also at this time, for the same reason as above, sufficient rotational torque is transmitted from the output shaft 250 to the rotating shaft 40.

[0093] As the rotating shaft 40 rotates while carrying the permanent magnet 88, an alternating current is generated in the surrounding electromagnetic coil 116. The alternating current is sent to the current converter 172 shown in FIGS. 2 and 7 via the U-phase terminal 156a, the V-phase terminal 156b, and the W-phase terminal 156c. The conversion circuit 174 of the current converter 172 converts this alternating current into a direct current. When the control circuit 178 of the current converter 172 determines that the output of an external load (for example, a motor) electrically connected to the battery 170 has decreased, it supplies the direct current to the battery 170 (see FIG. 7) via the capacitor 176. As a result, the battery 170 is charged.

[0094] In this process, among the current converter 172, the conversion circuit 174 and the capacitor 176 get particularly hot. However, in the present embodiment, the equipment case 180 is positioned and fixed on the outer peripheral wall of the main housing 16, and the conversion circuit 174 and the capacitor 176 in the equipment case 180 are brought close to the cooling jacket 21. For this reason, the heat of the conversion circuit 174 and the capacitor 176 is quickly conducted to the cooling medium in the cooling jacket 21. Thereby, it is avoided that the conversion circuit 174 and the capacitor 176 become excessively high in temperature.

[0095] In FIG. 3, it is preferable that the rotation directions of the output shaft 250 and the rotation shaft 40 are opposite to the rotation direction when the small cap nut 58, the large cap nut 60, and the male screw portion 252 are screwed together. This is because it is possible to avoid the small cap nut 58, the large cap nut 60, and the male screw portion 252 from loosening during the rotation of the rotation shaft 40. In addition, a mechanism for preventing loosening may be provided in advance in the small cap nut 58, the large cap nut 60, and the male screw portion 252.

[0096] Here, lubricating oil is supplied as a jet flow to the first bearing 92 and the second bearing 94 that rotatably support the rotating shaft 40 in the rotating electric machine housing 14. As a result, the first bearing 92 and the second bearing 94 are cooled by the lubricating oil, so that it is possible to suppress the occurrence of seizure in these first bearing 92 and second bearing 94. As described above, in the rotating electric machine system 10, a flow passage is formed with the internal spaces of the terminal casing 22 and the measuring instrument casing 24 on the upstream side and the first bearing 92 and the second bearing 94 on the downstream side. In addition, a labyrinth seal structure is provided in the flow passage, and the curtain air flows through this labyrinth seal structure. For this reason, it is difficult for the lubricating oil to enter the internal spaces of the terminal casing 22 and the measuring instrument casing 24.

[0097] Moreover, an air curtain is formed by the curtain air in the internal spaces of the terminal casing 22 and the measuring instrument casing 24. Therefore, even if the lubricating oil enters the internal spaces of the terminal casing 22 and the measuring instrument casing 24, it is possible to suppress the lubricating oil from adhering to the U-phase terminal 156a, the V-phase terminal 156b, the W-phase terminal 156c, the thermistor 152, and the like. For the above reasons, it is possible to effectively avoid the electrical terminal portion to which the battery 170 is electrically connected and the measuring instrument (thermistor 152, etc.) from being contaminated with the lubricating oil.

[0098] In addition, in the rotating electrical machine system 10, the air for the curtain that has passed through the first bearing 92 and the second bearing 94 flows so as to be discharged to the outside of the housing 14 for the rotating electrical machine. Therefore, even if lubricating oil leaks from the first bearing 92 or the second bearing 94, the lubricating oil is entrained by the air for the curtain and discharged to the outside of the housing 14 for the rotating electrical machine. Accordingly, it is possible to prevent the leaked lubricating oil from moving toward the rotor 30 side or remaining in the rotor 30.

[0099] As the rotating shaft 40 rotates, a plurality of permanent magnets 88 held at the large-diameter portion of the outer shaft 36 revolve. As a result, a current is induced in the electromagnetic coils 116 (U-phase coil, V-phase coil, W-phase coil) facing the permanent magnets 88. This current is taken out as electric power for energizing an external device via the U-phase terminal 156a, the V-phase terminal 156b, and the W-phase terminal 156c.

[0100] The electromagnetic coil 116 generates heat as current flows therethrough. Here, the air for the curtain before being branched contacts the left end of the stator 32. Also, the air for the curtain that travels through the storage chamber 114 and heads toward the insertion hole 68 contacts the outer wall and the inner wall of the stator 32 along the longitudinal direction. That is, a sufficient amount of the air for the curtain contacts the left end of the stator 32, and the air for the curtain after being branched contacts the entire outer wall and the inner wall.

[0101] In addition, a cooling medium flows through the cooling jacket 21 provided in the main housing 16. By this cooling medium, the stator 32 including the electromagnetic coil 116, and thus the rotating electrical machine 12, is quickly cooled by the air for the curtain and the cooling medium.

[0102] Also, in the present embodiment, a rotating electrical machine housing 14 (main housing 16) for housing the rotating electrical machine 12 and a terminal casing 22 for housing the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c are provided separately. Therefore, the heat generated in the stator 32 within the main housing 16 hardly affects the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c within the terminal casing 22. Since the terminals of the battery 170 (see FIG. 7) are electrically connected, the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c also generate heat. However, the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c are quickly cooled by the curtain air supplied to the terminal casing 22.

[0103] Thus, the curtain air also serves to cool the heat-generating locations in the rotating electrical machine system 10. And since the electrical terminal portions (U-phase terminal 156a, V-phase terminal 156b, W-phase terminal 156c), electromagnetic coils 116, permanent magnets 88, etc. are cooled, it is avoided that the heat affects the output control, etc. of the rotating electrical machine system 10, and that the excitation of the electromagnetic coils 116 and permanent magnets 88 decreases due to heat. As a result, the reliability of the rotating electrical machine system 10 is improved.

[0104] Furthermore, since the main housing 16 for housing the rotating electrical machine 12 and the terminal casing 22 for housing the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c are provided separately, the rotating electrical machine 12 and the electrical terminal portion are separated from each other. For this reason, the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c are hardly affected by the vibration generated as the rotor 30 rotates. In other words, the U-phase terminal 156a, V-phase terminal 156b, and W-phase terminal 156c are protected from vibration. Also, as described above, in the first bearing 92 and the second bearing 94, the occurrence of seizure is suppressed by the curtain air. Therefore, the rotating electrical machine system 10 becomes excellent in durability.

[0105] While the rotating shaft 40 is rotating, the rotation angle (rotation parameter) of the rotating shaft 40 is detected by the resolver 140. Specifically, integrally with the rotating shaft 40, the resolver rotor 56 externally fitted to the left end portion 46a of the inner shaft 34 rotates. As a result, the electrical signal generated in the resolver stator 130 is transmitted to the receiver electrically connected to the receiver connector 144. The receiver that reads the electrical signal calculates the rotation angle of the rotating shaft 40 based on the electrical signal and sends the result to a control device (not shown) or the like. The control device or the like obtains the rotation speed by calculation based on this rotation angle.

[0106] The resolver 140 is disposed at the protruding tip 104 of the rotating shaft 40 exposed from the rotating electric machine housing 14. Therefore, it is difficult for the resolver 140 to be affected by the heat generated in the electromagnetic coil 116 of the stator 32 in the rotating electric machine housing 14 or the vibration generated as the rotor 30 rotates. In addition, the first bearing 92 and the second bearing 94 that support the rotating shaft 40 are provided in the rotating electric machine housing 14. Therefore, the vibration of the first bearing 92 and the second bearing 94 is suppressed by the rotating electric machine housing 14. This also makes it difficult for the influence of vibration to reach the resolver 140.

[0107] As described above, by suppressing the transmission of heat and vibration, the detection result of the rotation angle by the resolver 140 becomes accurate. Also, the lifespan of the resolver 140 is extended.

[0108] Incidentally, for example, when replacing the resolver 140 with one having a larger inner diameter and outer diameter, the inner shaft 34 may be replaced with one having a larger diameter at the left end portion 46a. When a single solid rotating shaft is adopted as the rotating shaft 40, if the solid rotating shaft is replaced with a larger-diameter one to cope with replacing the resolver 140 with one having a larger inner diameter and outer diameter, it may become difficult to pass the solid rotating shaft through the first bearing 92 to the second bearing 94. As can be understood from this, the rotating shaft 40 is composed of the outer shaft 36 and the inner shaft 34, the outer shaft 36 is passed through the first bearing 92 and the second bearing 94, and the resolver rotor 56 is disposed at the portion of the inner shaft 34 exposed from the outer shaft 36. By replacing the inner shaft 34, it becomes possible to cope with resolvers 140 having various inner diameters and outer diameters.

[0109] The present invention is not particularly limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present invention.

[0110] For example, in this embodiment, the resolver 140 is adopted as the rotation parameter detector, but it is also possible to adopt a detector including a Hall element.

[0111] Also, the curtain air may be circulated through the internal space of the terminal casing 22 after being circulated through the internal space of the measuring instrument casing 24. Alternatively, the curtain air may be individually supplied to the measuring instrument casing 24 and the terminal casing 22, and the curtain air that has circulated through the internal spaces of the respective casings 22 and 24 may be individually circulated to the storage chamber 114.

[0112] Furthermore, in the gas turbine engine 200, the compressor wheel 230 and the turbine wheel 232 may be arranged in the reverse configuration to that shown in FIG. 8. That is, their positions may be swapped. In this case, a shaft hole 244 may be formed in the turbine wheel 232, and an output shaft 250 may be provided in the compressor wheel 230. In addition, the compressor wheel 230 and the turbine wheel 232 may be of the centrifugal or axial flow type. If the compressor wheel 230 and the turbine wheel 232 are arranged coaxially, a combination of a multi-stage compressor wheel and a multi-stage turbine wheel, which combines the centrifugal and axial flow types, may be used.

[0113] Furthermore, in FIG. 3, the rotating electrical machine 12 that constitutes the rotating electrical machine system 10 may be a motor in which the rotating shaft 40 rotates when the electromagnetic coil 116 is energized. In this case, the U-phase terminal 156a, the V-phase terminal 156b, and the W-phase terminal 156c serve as electrical terminal portions that receive power from the battery 170.

[0114] The current converter may have a circuit that decreases or increases the voltage of an alternating current or a direct current.

[0115] Alternatively, instead of the gas turbine engine 200 shown in FIG. 1 and the like, another internal combustion engine such as a reciprocating engine may be employed.

[0116] Furthermore, in the above-described embodiment, an example is shown in which a part of the compressed air generated in the gas turbine engine 200 is diverted to use the gas turbine engine 200 as a gas supply source. However, as shown in FIG. 2, it is also possible to use a pump 290 provided externally as the gas supply source. In this case, the atmosphere or the like may be compressed under the action of the pump 290 and supplied to the hollow pipe portions 158a to 158c or the collective flow path 74. Note that in this configuration, it is not particularly necessary to divert the compressed air from the gas turbine engine 200.

[0117] In addition, the configuration for transmitting torque between the rotating shaft 40 and the output shaft 250 is not particularly limited to the meshing of splines. For example, while providing one or more convex portions on the outer peripheral wall of the rotating shaft 40 so as to project radially outward, one or more concave portions may be formed on the output shaft 250, and the convex portions and the concave portions may be engaged with each other. Alternatively, while making the rotating shaft 40 have a polygonal shape, a polygonal hole may be formed in the output shaft 250, and the rotating shaft 40 may be engaged with the polygonal hole. In the latter case, the outer peripheral wall of the rotating shaft 40 becomes the inner peripheral side engaging portion, and the inner peripheral wall of the polygonal hole becomes the annular outer peripheral side engaging portion.

Explanation of Signs

[0118] 10…Rotating electrical machine system 12…Rotating electrical machine 14…Housing for rotating electrical machine 16…Main housing 18…First sub-housing 20…Second sub-housing 21…Cooling jacket 22…Casing for terminals 24…Casing for measuring instrument 26…Resolver holder 28…Cap cover 30…Rotor 32…Stator 34…Inner shaft 36…Outer shaft 40…Rotating shaft 48…First external thread portion 50…Flange portion 52…Stopper portion 54…Second external thread portion 56…Resolver rotor 58…Small cap nut 60…Large cap nut 62…Shaft connection hole 64…Female thread portion 66…First inner peripheral side spline 68…Insertion hole 70…Inner stopper 71…Outer stopper 74…Collecting flow path 76…Upstream side communication hole 78…Relay communication path 80a~80c…Downstream side communication holes 82…Rectifying member 84…Penetration hole 85…First outer peripheral side spline 88…Permanent magnet 90…Magnet holder 92…First bearing 94…Second bearing 98…First shaft insertion hole 100…Second shaft insertion hole 104…Protruding tip 114…Storage chamber 116…Electromagnetic coil 118…Insulating substrate 122…Annular recess 124…Annular protrusion 126…Hollow recess 130…Resolver stator 140…Resolver 152…Thermistor 154…Harness 156a…U-phase terminal 156b…V-phase terminal 156c…W-phase terminal 158a~158c…Hollow tube part 170…Battery 172…Current converter 174…Conversion circuit 176…Capacitor 178…Control circuit 180…Equipment case 182…Power module 200…Gas turbine engine 202…Inner housing 204…Outer housing 206…Engine housing 208…First annular part 210…Second annular part 212…Leg part 216…Exhaust passage 218…Shroud case 220…Exhaust port 230…Compressor wheel 232…Turbine wheel 234…Diffuser 236…Combustor 238…Nozzle 240…Intake space 242…Small-diameter cylindrical part 244…Axial hole 246…Second outer peripheral side spline 248…Inner flange part 250…Output shaft 252…Male screw part 254…Second inner peripheral side spline 256…Ring member 258…Fitting hole 264…Labyrinth convex part 268…Annular protrusion 270…Fitting convex part 272…Hole part 273…Combustion air flow passage 274…Fuel supply nozzle 276…Relay hole 290…Pump 300…Hybrid power system

Claims

1. A rotary electric machine system having a rotary electric machine and a housing for the rotary electric machine that rotatably supports the rotary shaft of the rotary electric machine, An internal combustion engine having an output shaft that rotates integrally with the rotary shaft, A compound power system comprising: A rotation parameter detector that detects rotation parameters of the rotary shaft, A detector holding member that is detachably attached to the housing for the rotary electric machine, A cover member attached to the detector holding member, Comprising, The rotation parameter detector has a first element and a second element, The rotary shaft has a first end and a second end, and a first bearing and a second bearing are respectively provided between the housing for the rotary electric machine and the first end and the second end, so that the rotary shaft is rotatably supported by the housing for the rotary electric machine via the first bearing and the second bearing, The first end includes a protruding tip that passes through the first bearing and protrudes outside the housing for the rotary electric machine, The housing for the rotary electric machine has an annular convex portion that protrudes in the axial direction of the rotary shaft and a hollow concave portion that is formed inside the annular convex portion and in which the protruding tip is located. The detector holding member is provided on the annular convex portion so as to close the hollow concave portion, The detector holding member holds the second element, The first element is provided at the protruding tip and faces the second element held by the detector holding member, The cover member covers the protruding tip and the rotation parameter detector, The rotation parameter detector is a resolver having a resolver rotor as the first element and a resolver stator as the second element, and the resolver rotor is externally fitted to the protruding tip, A first cap nut and a second cap nut are attached to the protruding tip, and the resolver stator is disposed between the first cap nut and the second cap nut. Compound power system.

2. The compound power system according to claim 1, wherein a receiver connector for electrically connecting the rotation parameter detector and a receiver that receives a signal emitted by the rotation parameter detector is provided on the detector holding member. Compound power system.

3. In the hybrid power system according to claim 1 or 2, a terminal casing that houses an electrical terminal portion for power transfer between the rotary electric machine and an external device is provided, and the terminal casing is provided on a side wall of the rotary electric machine housing. Hybrid power system.

4. In the hybrid power system according to claim 3, a hybrid power system comprising a measuring instrument casing that is adjacent to the terminal casing and houses a temperature measuring instrument for measuring the temperature of the rotary electric machine.

5. In the hybrid power system according to any one of claims 1 to 4, the internal combustion engine is a gas turbine engine having a compressor wheel and a turbine wheel, and the compressor wheel and the turbine wheel are supported by the output shaft. Hybrid power system.

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