Combined power system

Abstract

To provide a combined power system that can prevent lubricating oil from coming into contact with an electric terminal even when the lubricating oil leaks from an oil-based auxiliary equipment group.SOLUTION: In a combined power system 10, a rotating electric machine system includes a rotating electric machine, a rotating electric machine housing 240, an electrical terminal 110, and an oil-based auxiliary equipment group 150 for supplying lubricating oil to a bearing. The electrical terminal is electrically connected to a stator that constitutes the rotating electric machine. The bearing supports the rotating shaft of the rotating electric machine within the rotating electric machine housing. The oil-based auxiliary equipment group is supported by the rotating electric machine housing and is located below the electrical terminal.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a hybrid power system including a rotating electrical machine system and an internal combustion engine. [Background technology]

[0002] The combined power system includes a rotating electric machine system and an internal combustion engine. The rotating electric machine system includes a rotating electric machine having a rotor and a stator. The rotor includes a rotating shaft. The internal combustion engine has an output shaft inserted inside an engine housing. The output shaft is connected to one end of the rotating shaft in the axial direction. Therefore, the rotating shaft and the output shaft rotate integrally. Fuel is combusted inside the engine housing.

[0003] The rotating electric machine system further includes a rotating electric machine housing that houses a stator and a bearing. The rotating shaft is rotatably supported in the rotating electric machine housing via the bearing. As described in Patent Document 1, lubricating oil is supplied to the bearing. In the combined power system described in Patent Document 1, the internal combustion engine is a gas turbine engine. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-157730 Summary of the Invention [Problem to be solved by the invention]

[0005] The combined power system includes a plurality of oil accessories and a plurality of fuel accessories. The plurality of oil accessories constitute an oil system accessory group for supplying lubricating oil to bearings. The plurality of fuel accessories are devices for supplying fuel to an internal combustion engine. In a combined power system configured in this manner, if lubricating oil leaks from the oil system accessory group, there is a concern that the electrical terminals of the rotating electrical machine system will be contaminated with oil.

[0006] The present invention aims to solve the above-mentioned problems. [Means for solving the problem]

[0007] One aspect of the present disclosure is a hybrid power system including a rotating electric machine system and an internal combustion engine. In the hybrid power system, a rotating shaft of the rotating electric machine system and an output shaft of the internal combustion engine are connected in series and rotate integrally. The rotating electric machine system includes a rotating electric machine having a rotor including the rotating shaft and a stator, a rotating electric machine housing that accommodates the stator and a bearing and supports the rotating shaft via the bearing, an electrical terminal electrically connected to the stator, and an oil system accessory group including a plurality of oil accessories for supplying lubricating oil to the bearing. The oil system accessory group is supported by the rotating electric machine housing and located below the electrical terminal. [Effects of the Invention]

[0008] Even if lubricating oil leaks from the oil-based auxiliary machinery group, the lubricating oil is prevented from coming into contact with the electrical terminals, thereby preventing the electrical terminals from being soiled with the lubricating oil. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic overall perspective view of a combined power system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic cross-sectional side view of the rotating electrical machine system as seen from a direction perpendicular to the axial direction. [Figure 3] FIG. 3 is a schematic front view of the internal combustion engine as viewed from the rotating electrical machine system along the axial direction. [Figure 4] FIG. 4 is a schematic front view in which the positions of the oil system auxiliary equipment group and the fuel system auxiliary equipment group are interchanged from those in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] In the following description, the "axial direction" refers to the direction in which the rotating shaft 204 and the output shaft 404 extend. In Figs. 1 and 2, the axial direction is the direction along the arrow X. Figs. 1 to 4 show the combined power system 10 in a position in which the axial direction extends horizontally. In the axial direction of the rotating electric machine system 20, the end portion away from the internal combustion engine 40 may be referred to as the "first end," and the end portion closer to the internal combustion engine 40 may be referred to as the "second end." In the axial direction of the internal combustion engine 40, the end portion closer to the rotating electric machine system 20 may be referred to as the "first end," and the end portion farther from the rotating electric machine system 20 may be referred to as the "second end."

[0011] The "up-down direction" is the direction of gravity perpendicular to the axial direction, and is the direction along arrow Z in Figs. 1 to 4. "Up" means a relatively high position, and is not limited to an upper vertical position. "Down" means a relatively low position, and is not limited to a lower vertical position.

[0012] FIG. 1 is a schematic overall perspective view of a combined power system 10. The combined power system 10 includes a rotating electric machine system 20 and an internal combustion engine 40. The axis of the rotating electric machine system 20 coincides with the axis of the internal combustion engine 40. In other words, the rotating electric machine system 20 and the internal combustion engine 40 are arranged side by side on the same axis. In this embodiment, a gas turbine engine 400 is exemplified as the internal combustion engine 40. However, the internal combustion engine 40 is not limited to the gas turbine engine 400.

[0013] The combined power system 10 is used as a propulsion power source in, for example, an air vehicle, a ship, or an automobile. Specific examples of suitable air vehicles include drones and multicopters. When mounted on an air vehicle, the combined power system 10 is used as a power drive source for rotating, for example, a propeller or a ducted fan. When mounted on a ship, the combined power system 10 is used as a rotational force generator for a screw. When mounted on an automobile, the combined power system 10 is used as a power drive source for rotating a motor.

[0014] The combined power system 10 can also be used as a power source for auxiliary power supplies in aircraft, ships, buildings, etc. In addition, the combined power system 10 can also be used as a gas turbine power generation facility.

[0015] The rotating electric machine system 20 will now be described. As shown in Fig. 2, the rotating electric machine system 20 includes a rotating electric machine 200 and a rotating electric machine housing 240 that houses the rotating electric machine 200. The rotating electric machine housing 240 has a main housing 242 that is substantially cylindrical and has both axial ends that are open. The rotating electric machine housing 240 further includes a first sub-housing 244 connected to a first end of the main housing 242 and a second sub-housing 246 connected to a second end of the main housing 242.

[0016] A first end of the first sub-housing 244 is an open end, which is closed by a resolver holder 248. This closure forms a hollow portion 247 inside the first sub-housing 244. The resolver holder 248 holds a resolver stator 252. The resolver stator 252 and a resolver rotor 254 provided at the first end of the rotary shaft 204 constitute a resolver 250.

[0017] The main housing 242 has a storage chamber 22 therein. The storage chamber 22 is divided into a rotor chamber 26 and a stator chamber 28 by a partition member 24. The rotor chamber 26 is a chamber formed on the inside (inner peripheral side) of the partition member 24 in the diameter direction. The stator chamber 28 is a chamber formed on the outside (outer peripheral side) of the partition member 24 in the diameter direction.

[0018] The second sub-housing 246 has a flow straightening portion 260 at its second end facing the gas turbine engine 400. The flow straightening portion 260 has a generally frusto-conical shape, and its diameter gradually decreases from the main housing 242 toward the gas turbine engine 400. The flow straightening portion 260 has an insertion hole 262 at its diameter center. The second end of the rotary shaft 204 passes through the insertion hole 262.

[0019] The rotating electric machine 200 includes a rotor 202 and a stator 230 that surrounds the outer periphery of the rotor 202. Most of the rotor 202 is housed in a rotor chamber 26, and the stator 230 is housed in a stator chamber 28.

[0020] The rotor 202 includes a rotating shaft 204 and a permanent magnet 220. A sleeve 222 is interposed between the rotating shaft 204 and the permanent magnet 220. The sleeve 222 holds the permanent magnet 220.

[0021] The rotating shaft 204 has an inner shaft 206 and a hollow cylindrical outer shaft 208. The inner shaft 206 is removably inserted into the outer shaft 208. The inner shaft 206 is longer than the outer shaft 208. A first end 206a of the inner shaft 206 is exposed from a first end 208a of the outer shaft 208. The first end 206a of the inner shaft 206 is connected to the first end 208a of the outer shaft 208 by a positioning fixing part 212 that includes a nut member 210 or the like.

[0022] A first end of an output shaft 404 constituting a gas turbine engine 400 is connected to a second end 206b of the inner shaft 206, as will be described later.

[0023] A first end 208a of the outer shaft 208 is rotatably supported by a first sub-housing 244 via a first bearing (bearing) 270. A first oil supply passage 272 for supplying lubricating oil LO to the first bearing 270 is formed in the first sub-housing 244. The first sub-housing 244 further has a nozzle portion 276 in which a second oil supply passage 274 is formed. The first oil supply passage 272 and the second oil supply passage 274 are flow paths for supplying lubricating oil LO from the oil supply pump 156 to the first bearing 270.

[0024] The first sub-housing 244 and the main housing 242 have a first drain path 277 for discharging the lubricating oil LO to the outside of the rotating electrical machine housing 240. The first drain path 277 has a flow path 277a that extends in the diameter direction in the first sub-housing 244 and a flow path 277b that is bent in the axial direction relative to the flow path 277a. The flow path 277b of the first drain path 277 extends in the axial direction in the main housing 242. The first drain path 277 having the above-described shape merges with a second drain path 278 that extends in the diameter direction of the main housing 242 at the second end of the main housing 242.

[0025] A second end 208b of the outer shaft 208 is rotatably held in the main housing 242 via a second bearing (bearing) 280. The main housing 242 has a third oil supply passage 282 therein that branches off from the first oil supply passage 272. The third oil supply passage 282 extends axially from the first end to the second end of the main housing 242, and extends in the radial direction of the main housing 242 at the second end. A fourth oil supply passage 284 branches off from the third oil supply passage 282. The third oil supply passage 282 and the fourth oil supply passage 284 are flow paths for supplying lubricating oil LO from the oil supply pump 156 to the second bearing 280.

[0026] The second sub-housing 246 has a second drain path 278 for discharging the lubricating oil LO to the outside of the rotary electric machine housing 240. The second drain path 278 is a flow path that extends along the diameter direction of the second sub-housing 246. As described above, the second drain path 278 merges with the first drain path 277.

[0027] The stator 230 has a plurality of electromagnetic coils 232. The plurality of electromagnetic coils 232 includes a U-phase coil, a V-phase coil, and a W-phase coil. When the rotating electric machine 200 is a generator, the rotating electric machine 200 is a so-called three-phase power supply.

[0028] 1, a first casing 100 and a second casing 102 are integrally provided on the outer peripheral surface of the main housing 242 near the first end. That is, the first casing 100 and the second casing 102 are parts of the main housing 242.

[0029] A socket 104, which is a type of electrical device, is provided in the first casing 100. The socket 104 includes an electrical terminal 110. The electrical terminal 110 has a U-phase terminal 110a, a V-phase terminal 110b, and a W-phase terminal 110c. The U-phase terminal 110a, the V-phase terminal 110b, and the W-phase terminal 110c are electrically connected to the U-phase coil, the V-phase coil, and the W-phase coil of the electromagnetic coil 232, respectively.

[0030] 1, a thermistor 120, which is a type of electrical device, is housed in a second casing 102 adjacent to the first casing 100. A harness 122 connected to the thermistor 120 is drawn out from the second casing 102 to the outside.

[0031] A converter box 130 is further provided on the outer circumferential surface of the main housing 242. The converter box 130 is provided at a position slightly closer to the second end than the first casing 100. The converter box 130 houses a current converter 132, which is a type of electrical device. The current converter 132 has, for example, a conversion circuit, a capacitor, and a control circuit. Note that the conversion circuit, capacitor, and control circuit are not shown.

[0032] The rotating electric machine system 20 has an oil system auxiliary machine group 150 shown in Figures 2 and 3. In this embodiment, the oil system auxiliary machine group 150 includes an oil storage container 154, an oil supply pump 156 (supply pump), a suction pump 158, and a gas-liquid separator 160. The oil storage container 154, the oil supply pump 156, the suction pump 158, and the gas-liquid separator 160 are each an oil auxiliary machine 152. In this manner, the oil system auxiliary machine group 150 has a plurality of oil auxiliary machines 152. Note that while Figure 2 shows the oil system auxiliary machine group 150 in a schematic manner, as shown in Figure 3, the actual oil system auxiliary machine group 150 is supported on the rotating electric machine housing 240 via a bracket 162.

[0033] The oil supply pump 156 supplies the oil stored in the oil storage container 154 as lubricating oil LO to the first oil supply passage 272 and the third oil supply passage 282 via a first oil supply port 286 and a second oil supply port 288. In the illustrated example, the oil supply pump 156 can also supply the oil in the oil storage container 154 as cooling oil CO to an internal rotor flow path 292 formed mainly between the inner shaft 206 and the sleeve 222 via a third oil supply port 290.

[0034] The suction pump 158 sucks the mixed oil (lubricating oil LO and cooling oil CO) from the rotating electrical machine housing 240 and guides it to the gas-liquid separator 160 via the first drain path 277 and the second drain path 278. The gas-liquid separator 160 separates the gas phase (gas) from the mixed oil. Note that the gas phase may be, for example, compressed air mixed with the lubricating oil LO to turn the lubricating oil LO into a jet when the lubricating oil LO is supplied to the first bearing 270 and the second bearing 280. The oil storage container 154 stores the mixed oil from which the gas phase has been removed. The mixed oil in the oil storage container 154 is resupplied into the rotating electrical machine housing 240 as the lubricating oil LO and cooling oil CO by the oil supply pump 156. As described above, the lubricating oil LO is circulated and supplied to the first bearing 270 and the second bearing 280, and the cooling oil CO is circulated and supplied to the rotor internal flow path 292.

[0035] The rotating electrical machine system 20 is basically configured as described above. Next, the gas turbine engine 400 will be described. The configuration of the gas turbine engine 400 is similar to the configuration shown in, for example, Fig. 8 of Patent Document 1. Therefore, the description of the gas turbine engine 400 will be limited to an outline.

[0036] 1, a gas turbine engine 400 includes an engine housing 402. The engine housing 402 has a plurality of legs 406. An intake space 408 is formed between adjacent ones of the plurality of legs 406. A combustor (not shown) is provided inside the engine housing 402.

[0037] The gas turbine engine 400 includes an output shaft 404 shown in FIG. 2. The output shaft 404 is inserted inside the engine housing 402. A first end of the output shaft 404 is connected in series to a second end of the rotary shaft 204 (the second end 206b of the inner shaft 206). The output shaft 404 holds a compressor wheel (not shown) and a turbine wheel (not shown). The compressor wheel and the turbine wheel are rotatable integrally with the rotary shaft 204 and the output shaft 404.

[0038] The gas turbine engine 400 has a fuel system accessory group 410 and an ignition device 420, as shown in Figures 1, 3, and 4. In this embodiment, the fuel system accessory group 410 includes a fuel storage container 414, a filter 416, and a fuel supply pump 418. Each of the fuel storage container 414, the fuel supply pump 418, and the filter 416 is a fuel accessory 412. In this manner, the fuel system accessory group 410 has a plurality of fuel accessories 412.

[0039] A fuel supply pump 418 supplies fuel stored in a fuel storage container 414 to a combustor in the engine housing 402 via a filter 416. The filter 416 removes foreign matter contained in the fuel.

[0040] The ignition device 420 is a type of electrical device, and ignites fuel in the engine housing 402 when starting the gas turbine engine 400. The ignition device 420 is supported on the rotating electrical machine housing 240 via a stay (not shown). The ignition device 420 is located above the electrical terminal 110.

[0041] As shown in FIG. 3, when the engine housing 402 is viewed from the rotating electric machine housing 240 along the axial direction, the oil system auxiliary equipment group 150 and the fuel system auxiliary equipment group 410 are aligned in the circumferential direction. The oil system auxiliary equipment group 150 is concentrated in a first region AR1 in the circumferential direction. The fuel system auxiliary equipment group 410 is concentrated in a second region AR2 in the circumferential direction. The second region AR2 is a region that does not overlap with the first region AR1 in the circumferential direction. In this way, the oil system auxiliary equipment group 150 and the fuel system auxiliary equipment group 410 are arranged in different regions. Note that, as shown in FIG. 4, the position of the oil system auxiliary equipment group 150 (first region AR1) and the position of the fuel system auxiliary equipment group 410 (second region AR2) can be interchanged.

[0042] In the above configuration, the socket 104 (electrical terminal 110), the current converter 132, thermistor 120, and the ignition device 420 are disposed in the upper part of the rotating electrical machine housing 240. Moreover, the socket 104 (electrical terminal 110), the current converter 132, thermistor 120, and the ignition device 420 are positioned above the oil system auxiliary device group 150 and the fuel system auxiliary device group 410. In other words, the oil system auxiliary device group 150 and the fuel system auxiliary device group 410 are disposed below the electrical system devices.

[0043] The central axis Ax shown in Figures 3 and 4 is an axis passing through the center of the rotating shaft 204 in the diameter direction and is also the axis of the rotating electric machine system 20. In this embodiment, most of the oil system auxiliary machinery group 150 is located below the central axis Ax. A part of the oil system auxiliary machinery group 150 may be located above the central axis Ax. For example, the oil storage container 154, the oil supply pump 156, and the suction pump 158 are located below the central axis Ax. In addition, the lower part of the gas-liquid separator 160 is below the central axis Ax, and the upper part of the gas-liquid separator 160 is above the central axis Ax.

[0044] Most of the fuel system accessories 410 are also located below the central axis Ax. Part of the fuel system accessories 410 may be located above the central axis Ax. For example, the fuel storage container 414 and the filter 416 are located below the central axis Ax. In addition, a lower portion of the fuel supply pump 418 is below the central axis Ax, and an upper portion of the fuel supply pump 418 is above the central axis Ax.

[0045] The compound power system 10 includes a first fire protection member 12 and a second fire protection member 14. The first fire protection member 12 covers the outer periphery of the rotating electric machine housing 240. The electric terminals 110, the oil system accessories 150, the fuel system accessories 410, and the ignition device 420 are housed inside the first fire protection member 12. The second fire protection member 14 covers the outer periphery of the engine housing 402. An air duct (not shown) is interposed between the second end of the first fire protection member 12 and the first end of the second fire protection member 14.

[0046] In the illustrated example, the first fire protection member 12 and the second fire protection member 14 are each cylindrical. As shown in FIG. 3, the outer diameter OD1 of the first fire protection member 12, which is the outer dimension along the vertical direction, and the outer diameter OD2 of the second fire protection member 14, which is the outer dimension along the vertical direction, are approximately equal to each other. Note that it is not essential that the first fire protection member 12 and the second fire protection member 14 are each cylindrical. At least one of the first fire protection member 12 and the second fire protection member 14 may be in the shape of a semi-cylindrical arch. When the first fire protection member 12 or the second fire protection member 14 has a shape other than cylindrical, the outer dimensions of the first fire protection member 12 and the second fire protection member 14 are the dimensions along the vertical direction.

[0047] The operation of the combined power system 10 will now be described.

[0048] First, an alternating current is supplied to the electromagnetic coils 232 (U-phase coil, V-phase coil, and W-phase coil) via the U-phase terminal 110a, V-phase terminal 110b, and W-phase terminal 110c shown in Fig. 1. Accordingly, the rotor 202 starts to rotate. Alternatively, the rotor 202 may be rotated by a known starter (not shown).

[0049] As the rotary shaft 204 rotates, the output shaft 404 rotates integrally with the rotary shaft 204. Furthermore, a compressor wheel (not shown) and a turbine wheel (not shown) held by the output shaft 404 rotate integrally with the output shaft 404. As a result, atmospheric air is sucked inward of the legs 406 from the intake space 408 shown in FIG. 1. The atmospheric air is guided into the engine housing 402 by the air flow rectifier 260 (see FIG. 2) and compressed by the compressor wheel to become compressed air.

[0050] Furthermore, fuel stored in a fuel storage container 414 (see FIGS. 1, 3, and 4) is pumped up by a fuel supply pump 418. After passing through a filter 416, the fuel is sprayed into a combustor in the engine housing 402. In the combustor, a mixture of atomized fuel and compressed air is ignited by an ignition device 420. This causes combustion in the combustor. Thereafter, the combustion of the fuel propels the rotation of the output shaft 404. In other words, the output shaft 404 rotates continuously. Therefore, even if the supply of current to the electromagnetic coil 232 is stopped, the rotary shaft 204 rotates integrally with the output shaft 404.

[0051] While rotating shaft 204 and output shaft 404 are rotated as described above, oil supply pump 156 and suction pump 158 are started. Oil supply pump 156 pumps oil from oil storage container 154 toward first oil inlet 286 and second oil inlet 288. The oil is supplied as lubricating oil LO to first oil supply passage 272 and third oil supply passage 282 via first oil inlet 286 and second oil inlet 288, respectively. A portion of lubricating oil LO is discharged as a jet flow from first oil supply passage 272 and second oil supply passage 274 toward first bearing 270. After lubricating and cooling first bearing 270, lubricating oil LO is sucked by suction pump 158 and moves toward second drain passage 278 via hollow portion 247 of first sub-housing 244 and first drain passage 277.

[0052] The remainder of the lubricating oil LO is discharged as a jet stream from the third oil supply passage 282 and the fourth oil supply passage 284 toward the second bearing 280. After lubricating and cooling the second bearing 280, the lubricating oil LO is sucked by the suction pump 158 and moves toward the second drain passage 278. In addition, the oil supply pump 156 pumps the oil in the oil storage container 154 toward the third oil supply port 290. The oil is supplied to the rotor internal flow path 292 via the third oil supply port 290 as cooling oil CO. After mainly cooling the permanent magnets 220, the cooling oil CO is sucked by the suction pump 158 and moves toward the second drain passage 278.

[0053] In the second drain path 278, the lubricating oil LO that has lubricated and cooled the first bearing 270, the lubricating oil LO that has lubricated and cooled the second bearing 280, and the cooling oil CO that has circulated through the rotor internal flow path 292 join together. The mixed oil of the lubricating oil LO and the cooling oil CO is sucked by the suction pump 158, discharged to the outside of the rotating electrical machine housing 240, and moved to the gas-liquid separator 160. In the gas-liquid separator 160, a gas phase is separated from the mixed oil. The gas phase is released from the gas-liquid separator 160 to the atmosphere. The mixed oil moves from the gas-liquid separator 160 to the oil storage container 154, and then sucked by the oil supply pump 156 and resupplied into the rotating electrical machine housing 240 as the lubricating oil LO and the cooling oil CO.

[0054] As the rotating shaft 204 rotates, an AC current is generated in the electromagnetic coil 232 surrounding the permanent magnet 220. The AC current flows from the U-phase terminal 110a, the V-phase terminal 110b, and the W-phase terminal 110c to the current converter 132, where it is converted into a DC current. The DC current is supplied to an external load such as a battery (not shown).

[0055] When mixed oil leaks from the oil system auxiliary equipment group 150, the mixed oil drips onto the inner bottom surface of the first fire protection member 12. The dripped mixed oil is collected on the inner bottom surface of the first fire protection member 12. Similarly, when fuel leaks from the fuel system auxiliary equipment group 410, the fuel is collected on the inner bottom surface of the first fire protection member 12. This prevents the mixed oil or fuel from leaking out of the first fire protection member 12.

[0056] This embodiment has the following advantages.

[0057] 1 to 4, the rotating electrical machine system 20 constituting the combined power system 10 has an oil system auxiliary equipment group 150 for supplying lubricating oil LO to a first bearing 270 (see FIG. 2) and a second bearing 280 that support a rotating shaft 204. The rotating electrical machine system 20 further has a stator 230 and an electrical terminal 110 electrically connected to the stator 230. The oil system auxiliary equipment group 150 is located below the electrical terminal 110 (see FIGS. 1, 3, and 4).

[0058] Even if the lubricating oil LO leaks from any of the multiple oil auxiliaries 152 that make up the oil-system auxiliary group 150, it is difficult for the lubricating oil LO to rise. Therefore, the lubricating oil LO is prevented from coming into contact with the electrical terminals 110 that are located above the oil-system auxiliary group 150. This makes it possible to prevent the electrical terminals 110 from being soiled with the lubricating oil LO.

[0059] The oil system auxiliary group 150 has an oil storage container 154, an oil supply pump 156, a suction pump 158, and a gas-liquid separator 160. The supply pump supplies oil stored in the oil storage container 154 as lubricating oil LO into the rotating electrical machine housing 240. The suction pump 158 sucks the lubricating oil LO inside the rotating electrical machine housing 240 and directs (recovers) the lubricating oil LO toward the oil storage container 154. The gas-liquid separator 160 separates the gas phase contained in the lubricating oil LO sucked by the suction pump 158 from the lubricating oil LO.

[0060] In this manner, the lubricating oil LO can be supplied to the first bearing 270 and the second bearing 280 to lubricate them.

[0061] 1, 3, and 4, the gas turbine engine 400 has a fuel system accessory group 410 for supplying fuel to the combustor. The fuel system accessory group 410 is located below the electrical terminal 110.

[0062] Even if fuel leaks from any of the fuel accessories 412, it is difficult for the fuel to rise. Therefore, the fuel is prevented from coming into contact with the electric terminal 110, which is located above the fuel system accessories 410. This makes it possible to prevent the electric terminal 110 from being contaminated with fuel.

[0063] The oil system accessories 150 and the fuel system accessories 410 are disposed at a first end of the rotating shaft 204 that is remote from the gas turbine engine 400 in the axial direction of the rotating shaft 204 .

[0064] This prevents the lubricating oil LO from becoming hot due to radiant heat from the gas turbine engine 400. Therefore, for example, it is possible to supply the lubricating oil LO at a relatively low temperature to the first bearing 270 and the second bearing 280. As a result, the first bearing 270 and the second bearing 280 are sufficiently cooled by the lubricating oil LO. Furthermore, because the oil system accessories 150 and the fuel system accessories 410 are concentrated on the first end side of the rotating shaft 204, it is easy to perform maintenance on the oil system accessories 150 and the fuel system accessories 410.

[0065] As shown in Figure 3, the oil system auxiliary group 150 is arranged in a first region AR1 in the circumferential direction of the rotating electric machine housing 240, and the fuel system auxiliary group 410 is arranged in a second region AR2 in the circumferential direction of the rotating electric machine housing 240 that does not overlap with the first region AR1.

[0066] Because the oil system accessories 150 are concentrated in the first area AR1, it is easy to perform maintenance on the oil system accessories 150. Similarly, because the fuel system accessories 410 are concentrated in the second area AR2, it is also easy to perform maintenance on the fuel system accessories 410. Furthermore, because the oil storage container 154 is located in the first area AR1 and the fuel storage container 414 is located in the second area AR2, the weight balance in the circumferential direction of the combined power system 10 is generally balanced.

[0067] As can be seen by comparing Figures 3 and 4, the position of the oil system auxiliary machinery group 150 (first area AR1) and the position of the fuel system auxiliary machinery group 410 (second area AR2) can be interchanged.

[0068] According to this configuration, the oil system accessories 150 and the fuel system accessories 410 can be interchanged depending on the structure of the equipment in which the combined power system 10 is installed, thereby improving the degree of freedom in the layout of the equipment in which the combined power system 10 is installed.

[0069] The gas turbine engine 400 has an ignition device 420. The oil system accessories 150 and the fuel system accessories 410 are located below the ignition device 420. In other words, the ignition device 420 is located above the oil system accessories 150 and the fuel system accessories 410.

[0070] By adopting such a positional relationship, contact of the lubricating oil LO or fuel with the ignition device 420 is prevented.

[0071] The combined power system 10 includes a first fire protection member 12 that covers the outer periphery of the rotating electrical machine housing 240, and a second fire protection member 14 that covers the outer periphery of the engine housing 402. The electric terminals 110, the oil system auxiliary equipment group 150, and the fuel system auxiliary equipment group 410 are housed inside the first fire protection member 12.

[0072] Even if lubricating oil LO leaks from the oil-system auxiliary equipment group 150, the lubricating oil LO is collected by the first fire protection member 12. Similarly, when fuel leaks from the fuel-system auxiliary equipment group 410, the fuel is collected by the first fire protection member 12. That is, the lubricating oil LO and fuel are prevented from leaking from the first fire protection member 12. Therefore, it is possible to prevent equipment equipped with the combined power system 10 from being contaminated with the lubricating oil LO or fuel.

[0073] The outer diameter OD1 (outer dimension along the up-down direction) of the first fire protection member 12 and the outer diameter OD2 (outer dimension along the up-down direction) of the second fire protection member 14 are substantially equal to each other.

[0074] According to this configuration, it is easier to mount the compound power system 10 on equipment compared to a case where the outer dimensions of the first fire protection member 12 and the second fire protection member 14 are significantly different.

[0075] The following additional notes are further disclosed regarding the above embodiment.

[0076] (Appendix 1) The presently disclosed hybrid power system (10) includes a rotating electric machine system (20) and an internal combustion engine (40). A rotating shaft (204) of the rotating electric machine system and an output shaft (404) of the internal combustion engine are connected in series and rotate integrally. The rotating electric machine system includes a rotating electric machine (200) having a rotor (202) including the rotating shaft and a stator (203), a rotating electric machine housing (240) that houses the stator and bearings (270, 280) and supports the rotating shaft via the bearings, an electrical terminal (110) electrically connected to the stator, and an oil-based auxiliary group (150) having a plurality of oil-based auxiliary groups (152) for supplying lubricating oil (LO) to the bearings. The oil-based auxiliary group is supported by the rotating electric machine housing and positioned below the electrical terminals.

[0077] Even if lubricating oil leaks from one of the multiple oil-use accessories, the lubricating oil is prevented from coming into contact with the electrical terminals, thereby preventing the electrical terminals from being soiled with lubricating oil.

[0078] (Appendix 2) In the combined power system described in Appendix 1, the oil-based auxiliary equipment group may include an oil storage container (154) that stores the lubricating oil, a supply pump (156) that supplies the lubricating oil from the oil storage container toward the rotating electric machine housing, a suction pump (158) that sucks the lubricating oil in the rotating electric machine housing and directs it toward the oil storage container, and a gas-liquid separator (160) that separates gas contained in the lubricating oil sucked by the suction pump from the lubricating oil.

[0079] This configuration allows lubricating oil to be circulated and supplied to the bearings.

[0080] (Appendix 3) In the combined power system described in Appendix 1, the internal combustion engine may have a fuel system accessory group (410) having a plurality of fuel accessories (412) for supplying fuel to the internal combustion engine, and the fuel system accessory group may be located below the electrical terminal.

[0081] Even in the unlikely event that fuel leaks from the fuel system accessories, the fuel is prevented from coming into contact with the electrical terminals, thereby preventing the electrical terminals from being contaminated with fuel.

[0082] (Appendix 4) In the combined power system described in Supplementary Note 3, the oil system accessories and the fuel system accessories may be arranged at an end of the rotating shaft that is farther from the internal combustion engine in the axial direction of the rotating shaft.

[0083] The lubricating oil and fuel are prevented from becoming hot due to radiant heat from the internal combustion engine. Therefore, for example, it is possible to supply lubricating oil at a relatively low temperature to the bearings. As a result, the bearings are sufficiently cooled by the lubricating oil.

[0084] (Appendix 5) In the combined power system described in Appendix 3 or 4, the oil system auxiliary equipment group may be arranged in a first region (AR1) in the circumferential direction of the rotating electric housing, and the fuel system auxiliary equipment group may be arranged in a second region (AR2) in the circumferential direction of the rotating electric housing that does not overlap with the first region.

[0085] Since the oil system accessories are concentrated in the first area, it is easy to perform maintenance on the oil system accessories.Similarly, since the fuel system accessories are concentrated in the second area, it is also easy to perform maintenance on the fuel system accessories.

[0086] Furthermore, since the oil storage container is located in the first area and the fuel storage container is located in the second area, the weight balance in the circumferential direction of the combined power system is generally balanced.

[0087] (Appendix 6) In the combined power system described in Appendix 5, the oil system auxiliary machine group and the fuel system auxiliary machine group may be interchangeable with each other.

[0088] For example, the oil system auxiliary machinery group and the fuel system auxiliary machinery group can be interchanged depending on the structure of the equipment in which the combined power system is installed, which increases the degree of freedom in the layout of the combined power system in the equipment.

[0089] (Appendix 7) In the combined power system described in any one of Supplementary Notes 3 to 6, the internal combustion engine may have an ignition device (420) for starting the internal combustion engine, and the oil system accessories and the fuel system accessories may be located below the ignition device.

[0090] This prevents the lubricating oil or fuel from coming into contact with the ignition device, which is an electrical device.

[0091] (Appendix 8) The combined power system described in any one of Supplementary Notes 1 to 7 may include a first fire protection member (12) that covers the outer periphery of the rotating electric machine housing, and a second fire protection member (14) that covers the outer periphery of an engine housing (402) that constitutes the internal combustion engine, and the electrical terminals and the oil-based auxiliary machinery group may be housed inside the first fire protection member.

[0092] Even if lubricating oil leaks from the oil-system accessories, the lubricating oil is collected by the first fire protection member. In the case where the combined power system is equipped with fuel-system accessories, if fuel leaks from the fuel-system accessories, the fuel is similarly collected by the first fire protection member. In other words, the lubricating oil and fuel are prevented from leaking from the first fire protection member. Therefore, it is possible to prevent equipment equipped with the combined power system from being contaminated with lubricating oil or fuel.

[0093] (Appendix 9) In the compound power system described in Supplementary Note 8, the first fire protection member and the second fire protection member may have approximately the same outer dimension along the up-down direction.

[0094] Compared to a case where the outer dimensions of the first fire protection member and the outer dimensions of the second fire protection member are significantly different, it is easier to mount the composite power system on the equipment.

[0095] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0096] 10...Composite power system 12...First fire protection member 14... Second fire protection member 20... Rotating electrical machine system 40...Internal combustion engine 110...Electrical terminal 132...Current converter 150...Oil-based auxiliary equipment group 152...Oil auxiliary equipment 154...Oil storage container 156...Oil supply pump 158...Suction pump 160...gas-liquid separator 200...rotating electric machine 204...rotating shaft 230...stator 240... Rotating electric machine housing 270... First bearing 280...Second bearing 400...Gas turbine engine 402...engine housing 404...output shaft 410…Fuel system auxiliary equipment group 412…Fuel auxiliary equipment 414...Fuel storage container 418...Fuel supply pump 420…Ignition device AR1…1st area AR2…Second area LO…Lubricating oil

Claims

1. A composite power system comprising a rotating electric machine system and an internal combustion engine, wherein a rotating shaft of the rotating electric machine system and an output shaft of the internal combustion engine are connected in series and rotate integrally, The rotating electric machine system includes a rotating electric machine having a rotor including the rotating shaft and a stator, a rotating electric machine housing that houses the stator and a bearing and supports the rotating shaft via the bearing, an electric terminal electrically connected to the stator, and an oil-based auxiliary machine group that has a plurality of oil-based auxiliary machines for supplying lubricating oil to the bearing, The oil-based auxiliary equipment group is supported by the rotating electrical machine housing and is located below the electrical terminals.

2. 2. The combined power system according to claim 1, wherein the oil-based auxiliary equipment group includes an oil storage container that stores the lubricating oil, a supply pump that supplies the lubricating oil from the oil storage container toward the rotating electric machine housing, a suction pump that sucks the lubricating oil in the rotating electric machine housing and directs it toward the oil storage container, and a gas-liquid separator that separates gas contained in the lubricating oil sucked by the suction pump from the lubricating oil.

3. 2. The combined power system according to claim 1, wherein the internal combustion engine has a fuel system accessory group having a plurality of fuel accessories for supplying fuel to the internal combustion engine; A combined power system, wherein the fuel system accessories are located below the electrical terminals.

4. 4. The combined power system according to claim 3, wherein the oil system accessories and the fuel system accessories are disposed at an end of the rotating shaft that is farther from the internal combustion engine in the axial direction of the rotating shaft.

5. 5. A combined power system according to claim 4, wherein the oil system accessories are arranged in a first region in the circumferential direction of the rotating electric machine housing, and the fuel system accessories are arranged in a second region in the circumferential direction of the rotating electric machine housing that does not overlap with the first region.

6. 6. The combined power system according to claim 5, wherein the oil system accessories and the fuel system accessories are interchangeable.

7. 4. The combined power system of claim 3, wherein the internal combustion engine includes an ignition device for starting the internal combustion engine; A combined power system, wherein the oil system accessories and the fuel system accessories are located below the ignition device.

8. 8. The combined power system according to claim 1, further comprising: a first fire protection member that covers the outer periphery of the rotating electric machine housing; and a second fire protection member that covers the outer periphery of an engine housing that constitutes the internal combustion engine, wherein the electrical terminals and the oil-based auxiliary machinery group are housed inside the first fire protection member.

9. 9. The compound power system according to claim 8, wherein the first fire protection member has an outer dimension along the vertical direction that is approximately equal to the outer dimension along the vertical direction of the second fire protection member.

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