JP2014206120A - Stirling engine generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact Stirling engine generator of light weight, low vibration and high reliability, capable of controlling power generation with high efficiency while keeping a constant heater tube temperature by quickly increasing and decreasing an engine speed, without executing pressure control and stroke control, when input of solar heat changes.SOLUTION: An output shaft 7 having a swash plate 28, has two radial bearings 19, 22 and two thrust bearings 20, 21. A rotor core 9 of a generator, having very small inertia mass is disposed on the output shaft 7 projecting to the external of the radial bearing 19, and a resolver 17 for detecting a rotating position, is disposed on a tip of the output shaft 7.

Description

  The present invention relates to a Stirling engine generator intended primarily for use as a solar power generator.

  The Stirling engine is an external combustion engine that can use various types of heat sources. As shown in Non-Patent Document 1 as technology is accumulated, the double-acting four-cylinder rotary swash plate Stirling engine already has a high thermal efficiency comparable to that of an internal combustion engine. It is expected to be used for engine generators mounted on solar concentrators.

  2. Description of the Related Art Conventionally, a thermoelectric generator system has been proposed in which an engine generator in which a double-acting four-cylinder rotary swash plate Stirling engine and an induction generator are coupled and coupled to a concentrator that uses a reflecting mirror that tracks the sun (Patent Literature). 3 paragraph 0030, FIG. 3 etc.).

  However, the thermoelectric generator system described in Patent Document 3 has a drawback that the weight of the engine generator is heavy and the size is too large, and the operating gas pressure is controlled in response to changes in solar heat to input heat to the engine. When changing the pressure, the pressure balance between the cylinders is lost, and problems such as engine vibration and working gas leakage occur.

  In order to solve such problems, a structure in which a rotor coil of a generator is installed on an engine output shaft has been proposed in order to reduce the size and weight of an engine generator (see paragraph 0020 of Patent Document 1). ).

  However, in the structure described in Patent Document 1, since the winding rotor of the generator has a large inertial mass and the engine speed cannot be changed quickly, the working gas pressure is controlled in response to changes in solar heat. The pressure balance between the four cylinders is lost, the oil from the rod seal rises, the gas leaks, and the vibrations cause the engine damage. Also, since the wound rotor is heavy, 5 or 4 or more radial bearings are used (see paragraphs 0020, 0023, etc.). Arise.

  In addition, the rotor coil of the generator is splined to the output shaft of a double-acting four-cylinder rotary swash plate type Stirling engine equipped with a mechanism for changing the angle of the swash plate and eliminating the rod seal and sealing the drive case. A structure has been proposed in which radial bearings are arranged at four locations (see FIG. 1, FIG. 2, etc.) to reduce the size and weight (see Patent Document 2).

  However, in the structure described in Patent Document 2, the wound rotor coil has a large inertial mass, and the engine rotation speed cannot be controlled quickly in response to changes in the input of solar heat. Although it has a mechanism, this mechanism requires extra parts such as an internal motor and complicated gears, and causes a power loss to change the angle, reducing the overall power generation efficiency, The inside of the drive case becomes high pressure, and the thickness of the case increases, causing a problem that the engine becomes heavy.

JP 2007-113468 A U.S. Pat. No. 4,885,980 JP-A-9-280664

Dictionary of Engines Asakura Shoten Publishing, pages 724-731, published in 1994

  In the Stirling engine generator, especially when using solar heat, if the inertial mass of the generator rotor is large, the rotational speed of the Stirling engine generator cannot be changed quickly in response to changes in solar heat. It will cause trouble.

  Therefore, a pressure control mechanism and a stroke control mechanism are required as means for changing the output torque of the Stirling engine. As a result, there arises a problem that the engine generator unit is heavy, has low efficiency, and has low reliability.

  The present invention aims to solve the above-mentioned conventional problems, and even if the incident heat of the sun changes, the Stirling engine power generation can be performed without adopting a complicated configuration that changes the pressure of the working gas and the stroke of the piston. It is an object of the present invention to realize a Stalin engine generator capable of adjusting the amount of power generation by changing the number of revolutions of the engine generator quickly by reducing the weight of the rotor of the machine and extremely reducing the inertial mass.

  In order to solve the above-mentioned problems, the present invention has a generator part and an engine part, and each of a plurality of piston cylinders provided in the engine part is provided with an operating piston having a piston ring. The cylinder is separated into a high temperature space side and a low temperature space, and each high temperature space includes a high temperature heat exchanger, a regenerative heat exchanger and a low temperature heat exchanger, and is connected to a low temperature space of another adjacent cylinder, Stirling engine power generators are connected to guide pistons via rods, each rod has a shaft seal mechanism, and an output extraction mechanism that converts the reciprocating motion of the guide pistons into rotation of the output shaft of the engine. In the machine, a rotor core made of light non-ferrous metal or polymer material is attached on the output shaft of the engine, and on the outer periphery of the rotor core A number of tile-shaped permanent magnet pieces are bonded to form a rotor of the generator, a rotating portion of a resolver is provided at the tip of the output shaft of the engine, and a three-phase winding stator is provided outside the rotor. Provided is a Stirling engine generator characterized in that an alternating current is generated.

  The plurality of tile-shaped permanent magnet pieces have −60 degrees, 0 degrees, +60 degrees, −120 degrees, 180 degrees, +120 degrees with respect to the line in which the N-pole direction connects the center of the rotor core and the center of the permanent magnet pieces. 6 × n permanent magnet pieces so as to form a plurality of n pairs (where n is 5, 8, or 11) in a similar arrangement. Is preferably arranged around the rotor core.

  A laminated steel plate on a ring having a convex portion can be arranged between the rotor core and the tile-like permanent magnet piece to improve the formation of the magnetic field circuit.

  A structure in which a sleeve made of a material with high rigidity is press-fitted into the output shaft side of the rotor core, a key groove is attached to the sleeve, and a bearing surface of the shaft and a nut is attached at both ends to be attached to the shaft of the engine. It is preferable to do.

  A rotor lid is disposed on one end side of the rotor core, and the permanent magnet piece bonded to the outer peripheral side of the rotor core is held by a carbon fiber rotor outer cylinder and the rotor lid so as not to scatter. It is preferable.

  A recess is formed on the rotor core on the engine part side, and a bearing for rotatably supporting the output shaft and a boss part of a drive block of a Stirling engine on which the bearing is mounted enter the recess of the rotor core. By doing so, it is preferable that the axial length of the bearing can be made longer, and the rotor and the output shaft can be stably rotated.

  A partition plate fitted with an O-ring and an oil seal is attached to the drive block of the guide piston cylinder that guides the boss and guide piston, and an oil discharge passage for lubricating oil is provided in the drive block so that oil enters the generator section. It is preferable to have no structure.

  The number of teeth of the stator core of the Stirling engine generator is set to nx with respect to the plurality of tile-shaped permanent magnet pieces forming the plurality of n pairs (where n is 5, 8, or 11). It is preferable that 2 + 2 wires are used, and the three copper wires are respectively wound clockwise or counterclockwise from the center toward the teeth, and one of the three copper wires is connected, and one is used as an output lead-out wire.

  It is preferable that the output shaft is held at two radial bearings and two thrust bearings at both ends of the rotary swash plate, and lubricating oil is forcibly lubricated from the output shaft.

  Since the Stirling engine generator according to the present invention can quickly control the engine speed in response to changes in solar heat, it is possible to operate the heater at the optimum temperature without pressure control or stroke control of the working gas. It has the advantages of being light weight, small size, low vibration, high reliability, and operation with high power generation efficiency, suitable for mounting on solar concentrators.

It is sectional drawing which shows the whole structure of the Example of the Stirling engine generator which concerns on this invention. It is a perspective view which shows the component of the generator part of the said Example. It is sectional drawing which shows the structure of the rotor of the Stirling engine generator of the said Example. It is explanatory drawing which showed the orientation (magnetization direction) of the magnetic field of the permanent magnet piece of the rotor of the said Example. It is sectional drawing which shows the rotor and stator laminated steel plate of the said Example. It is a schematic diagram which shows the structural example of the winding in the stator of the generator part of the said Example. It is a fragmentary sectional view explaining the modification of the Stirling engine generator which concerns on this invention. It is a schematic diagram explaining the structure of the Stirling engine action | operation part of FIG. It is explanatory drawing which showed the positional relationship which mounts a Stirling engine generator in a solar heat collector, (a) shows the structure which has arrange | positioned the high temperature heat exchanger in the reflective focus of a mirror, (b) is the lens of a mirror. It is a figure which shows the structure which has arrange | positioned the high temperature heat exchanger in the focus.

  EMBODIMENT OF THE INVENTION The form for implementing the Stirling engine generator which concerns on this invention is demonstrated below with reference to drawings based on an Example.

(Example)
FIG. 1 is a schematic overall sectional view of an embodiment of a Stirling engine generator according to the present invention. The Stirling engine generator 1 of an Example is provided with the engine part and the generator part. The generator section includes an operation section block 2, a lower drive section block 3, and an upper drive section block 4 of the Stirling engine. The generator unit includes a generator housing 5 and a lid 6.

  The operation unit block 2, the lower drive unit block 3, and the upper drive unit block 4 of the Stirling engine are configured such that the generator housing 5 and the lid 6 are stacked in order from the bottom and fastened with bolts to be integrated. ing.

   A high-temperature heat exchanger housing 41 is fixed and attached to the lower side of the working unit block 2 with fixing bolts 42. The Stirling engine generator 1 includes an output shaft 7 of the engine, and a rotor 8 is attached to the output shaft 7 by a detent key and a fixing nut 14.

  Specifically, a sleeve 8 'made of a highly rigid material is press-fitted into the output shaft 7 side of the rotor core 9 of the rotor 8, a key groove is provided in the sleeve 8', and a stepped seating surface is formed on the output shaft. And tightened from the end with a fixing nut 14 screwed to the output shaft 7 so that it can be attached to and detached from the output shaft 7.

  Since the attachment portion of the rotor 8 to the output shaft 7 is a portion that transmits torque, strength is required. In the present invention, the sleeve 8 'made of a material having high rigidity is press-fitted into the output shaft 7 side of the rotor core 9. Therefore, even if the rotor core 9 is made of a lightweight material, the above-described strength requirement is satisfied.

  As will be described in detail later, the rotor 8 is a ring in which a rotor core 9 made of a light non-ferrous metal or a polymer resin material is joined to the rotor sleeve 8 ′, and the outer periphery of the rotor core 9 has a protrusion for preventing rotation. The tile-shaped permanent magnet piece 11 is bonded via a laminated laminated steel plate 10 and further tightened with a carbon fiber rotor outer cylinder 12 so that the permanent magnet piece 11 is not scattered.

  A rotating portion 17 a of a resolver 17 is attached to the tip of the output shaft 7. A signal line 18 from a fixing portion 17 b of the resolver 17 and a three-phase power line from a stator 15 of a generator fixed to the generator housing 5. It has a structure having 16.

  A rotary swash plate 28 is fixed to the output shaft 7. Four sets of piston devices each composed of two hemispherical shoes 27, one guide piston 29, piston rod 31, and actuating piston 36 are assembled so as to sandwich the rotary swash plate 28 therebetween. Thus, an output take-out mechanism that converts the reciprocating motion of the guide piston 29 into the rotation of the output shaft 7 is configured.

  An oil circulation circuit for supplying oil to the sliding portions of the rotary swash plate 28 and the guide piston 29 is formed as follows. Lubricating oil ejected from the lubricating oil supply hole 23 of the output shaft 7 is supplied to the sliding surfaces of the shoe 27 and the rotating swash plate 28 and the sliding surfaces of the drive unit blocks 3 and 4 that function as the guide piston 29 and the guide piston cylinder. Then, it flows down, exits from the oil discharge port 25 to the outside of the drive unit, passes through a filter (not shown), is supplied again from the oil supply port 26 to the oil supply pump 24, and the above circulation is performed.

  Further, a rod seal 32, an oil scraper seal 33 and a gas seal 34 are provided for the piston rod 31 to constitute a shaft seal mechanism. The shaft seal mechanism having such a configuration constitutes a mechanism in which high-pressure working gas inside the piston cylinder 41 a does not leak into the drive unit blocks 3 and 4. With this mechanism, the pressure inside the drive unit blocks 3 and 4 and the generator housing 5 is structured to be atmospheric pressure.

  The piston block 41a is equally divided into 90 degrees on the same circumference on the working block 2 and the high temperature heat exchanger housing 41 of the Stirling engine, and a piston ring 35 is attached to each piston cylinder 41a. The actuating piston 36 is provided so as to reciprocate.

  As shown in FIG. 8, the working piston 36 is divided into a low temperature space 38 ′ and a high temperature space 40 ′ constituting the working space, and from the low temperature space 38 ′ for one working piston 36 through the low temperature passage 37. A low temperature heat exchanger (cooler) 38, a regenerative heat exchanger 39, a high temperature heat exchanger (heater) 40, and a high temperature space 40 'for the adjacent working piston 36 are sequentially communicated.

  By reciprocating the four working pistons 36, for example, when high-pressure helium gas is sealed in the working space, a thermodynamic cycle (Stirling cycle) of expansion, isobaric cooling, compression, isobaric heating is formed, and high-temperature heat exchange is performed. In order to convert the difference between the heat absorption energy from the heater (heater) 40 and the heat radiation energy from the low temperature heat exchanger (cooler) 38 into work, the four working spaces have the heat exchangers 38, 39, 40.

  In the drive unit blocks 3 and 4 and the generator housing 5 of the present invention, the output shaft 7 is rotatably provided so as to be supported by the two radial bearings 19 and 22 and the two thrust bearings 20 and 21. It has been.

  The radial bearing 19 is mounted on the boss portion 4 b of the drive unit block 4. The boss 4b is provided so as to enter the recess 8g of the rotor core 9. The radial bearing 19 is provided at a midpoint position between the center of gravity of the rotor 8 and the center of gravity of the rotary swash plate 28, and is formed twice as long as the radial bearing 22.

  By providing the radial bearings 19 and 22 and the thrust bearings 20 and 21 as described above, the rotor 8 is prevented from swinging, and even if the Stirling engine generator 1 is inclined in the horizontal direction from the vertical position, the rotor 8 and the rotation tilt The weight of the plate 28 and the piston load are dispersed and supported at four locations by the radial bearings 19 and 22 and the thrust bearings 20 and 21, thereby enabling stable rotational movement of the shaft.

  The radial bearings 19, 22 and the thrust bearings 20, 21 have a structure in which the lubricating oil whose pressure has been increased by the oil supply pump 24 is supplied from the lubricating oil supply hole 23 of the output shaft 7.

  FIG. 2 is a three-dimensional view showing the structure of the generator section of the present invention.

  The structure of the rotor 8 of the Stirling engine generator according to the present invention is as follows. The rotor core 9 of the rotor 8 is made of a lightweight non-ferrous metal (for example, aluminum) or a polymer resin material (for example, Teflon (registered trademark)).

  On the outer periphery of the rotor core 9, a laminated plate 10 of steel plates such as a ring-shaped silicon steel plate having a rotation stop projection (referred to herein as “laminated steel plate”) 10 is fitted, and on the outer periphery of the laminated steel plate 10, A plurality of tile-like permanent magnet pieces 11 are bonded, and the outer sides thereof are covered with a carbon fiber rotor outer cylinder 12.

  Since the ring-shaped laminated steel sheet 10 is fitted on the outer periphery of the rotor core 9, the magnetic field circuit is formed more effectively. A ring-shaped rotor lid 13 is attached to the rotor core 9 with bolts 59, and is bonded to the outer peripheral side of the rotor core 9 by the rotor lid 13 and the carbon fiber rotor outer cylinder 12. Since the permanent magnet piece 11 is pressed and held, the structure prevents the permanent magnet piece 11 from being scattered outward by centrifugal force.

  FIG. 3 is a cross-sectional view perpendicular to the center of rotation in the rotor 8 of the present invention, and FIG. 4 is a schematic diagram showing the magnetization directions of the six types of permanent magnet pieces 11.

  The permanent magnet piece 11 used in the rotor 8 of the present invention has six types of permanent magnet pieces having different magnetization directions, for example, six permanent magnet pieces 50, 51, 52, 53 as shown in FIGS. , 54, 55 are used.

  The six permanent magnet pieces 50, 51, 52, 53, 54, 55 have an inclination in the N-pole direction of 60 degrees, 0 degrees with respect to the line 102 connecting the rotor center 101 and the center of each arc of the permanent magnet pieces, Eight sets (a total of 48) were arranged on the circumference without gaps so as to be −60 degrees, −120 degrees, 180 degrees, and −120 degrees, so that eight pairs of magnetic poles could be formed.

  The set of six permanent magnet pieces 50, 51, 52, 53, 54, and 55 is 5 sets (10 total) in addition to the 8 sets (48 total) as described above, and can form 5 pairs of magnetic poles. Alternatively, it may be configured such that 11 sets (66 in total) and 11 sets of magnetic pole pairs can be formed.

  As shown in FIG. 5, the rotor 8 is rotatably disposed in the stator 15 including the laminated steel plate 56 and the winding wire 16. The stator 15 is formed such that stator teeth 57 and winding spaces 58 are alternately arranged in the circumferential direction on the inner peripheral side thereof.

  For example, when the set of six permanent magnet pieces 50, 51, 52, 53, 54, 55 is eight sets (48 in total) as described above, the 18 teeth 57 and the winding space 58 are arranged in the circumferential direction. It is formed so as to be alternately arranged. Further, when the number of the six permanent magnet pieces 50, 51, 52, 53, 54, 55 is 5 or 11 (total of 30 or 66), the number of teeth 57 and the winding space 58 is 12 or 24. It is a piece.

  In short, 6 × n + 2 teeth 57 and winding space for a configuration in which n pairs of six permanent magnet pieces (where n is 8, 5 or 11) can form n pairs of magnetic poles. 58 are formed so as to be alternately arranged in the circumferential direction.

  FIG. 6 is a schematic diagram showing a configuration example of the winding 16 in the stator 15 of the present invention. As described above, the stator 15 includes the 18 winding spaces 58 with respect to the eight permanent magnet pieces 50, 51, 52, 53, 54, and 55 in the rotor 8 (48 in total). As shown in FIG. 6, three copper wires 16a, 16b, and 16c constituting the winding 16 are wound on the stator laminated core 56 having the teeth 57 with respect to the three adjacent teeth 57 as shown in FIG. Then, it was wound in a right-handed manner, one end was taken out as an output line 60, and the other end was a Y-connection used in a connected three-phase AC synchronous generator.

  FIG. 7 is a view showing a modification of the embodiment of the Stirling engine generator according to the present invention. Since this modified Stirling engine generator 1 'is substantially the same as the Stirling engine generator 1 of the above-described embodiment, only a different configuration will be described.

  The Stirling engine generator of this modification is upside down with respect to the above embodiment, and the generator housing 5 is provided below. A partition plate 71 is provided below the drive unit block 4 and is separated from the generator housing 5.

  The partition plate 71 has a circular shape in plan view, and is provided with a ring portion 73 standing upward on the outer periphery so that a boss portion 72 having a center hole 74 projects downward at the center portion. Is provided. An inclined surface is formed downward from the ring portion 73 to the boss portion 72.

  An O-ring 76 is attached to the outer periphery of the ring portion 73 and is fitted through the ring portion 70 and the O-ring 76 of the drive unit block 4, and the center hole 74 of the boss portion 72 is for a rotating shaft. An oil seal 77 is attached, and the shaft lubricating oil does not leak into the generator housing 5.

  The drive block 4 is formed with an oil discharge path 78 and an oil discharge port 79 for lubricating oil. The lubricating oil 75 stored on the partition plate is sucked from an oil discharge path 78 and an oil discharge port 79 by an external oil pump (not shown).

  In this modification, a spacer 83 is attached in place of the oil supply pump 24. The lubricating oil is pressurized by an external oil pump (not shown) and supplied to the radial bearings 19 and 22, the thrust bearings 20 and 21, and the rotary swash plate 28 through the oil supply hole 81 and the oil supply port 82 of the spacer 83. The oil flows down to the oil reservoir 75 on the partition plate 71 due to gravity, and the lubricating oil is circulated. In addition, 3b is the boss | hub part of the drive part block 3, and the radial bearing 22 is provided in the inner side.

  FIG. 9 is a view showing the arrangement of the Stirling engine generator according to the present invention with respect to the light condensing means when operating using solar heat. FIG. 9A shows a case where the Stirling engine generator 1 of the above-described embodiment is operated using solar heat. The mirror 90 is used as a condensing means, and the sunlight 92 is collected by the mirror 90. It was set as the structure which irradiates the high temperature heat exchanger 40 with reflected light.

  FIG. 9B shows a case where the Stirling engine generator 1 ′ according to the modified example of the above embodiment is operated using solar heat. The lens 91 is used as the light collecting means, and the solar rays 92 are collected by the lens 71. It was set as the structure which shines and irradiates the high temperature heat exchanger 40. FIG.

(Function)
Next, the operation of the Stirling engine generator according to the embodiment having the above configuration will be described.

  In the working space of the Stirling engine, a high-pressure working gas, for example, 6 MPa helium, is sealed and sealed by a shaft seal 32 provided to the piston rod 31 as a working gas. The working gas is stationary without flowing when the Stirling engine is not in operation.

  At the time of start-up, when an alternating current is passed from the inverter (not shown) to the three copper wires 16a, 16b, and 16c, a magnetic field is formed in the stator 15 and a permanent magnet piece 11 adhered to the rotor core 9 is generated. Acts on a magnetic field and generates rotational torque.

  At this time, the angle of the rotor 8 can be output as a signal of the resolver 17, and the inverter uses this rotation signal to control the phase angle of the alternating current to be applied to generate the maximum rotational torque at a constant current value. The output shaft 7 is rotated.

  Next, when the rotation of the output shaft 7 starts, the oil supply pump 24 rotates to supply the lubricating oil to the radial bearings 19 and 22 and the thrust bearings 20 and 21, and the rotary swash plate 28 rotates with less mechanical loss. Then, the reciprocation of the guide piston 29 and the working piston 36 is started.

  When the reciprocating motion of the working piston 36 starts, the working gas absorbs heat from the high-temperature heat exchanger (heater) 40 by repeating a thermal cycle (Stirling cycle) of expansion, isovolume cooling, compression, and isovolume heating. When the compression heat is radiated from the low-temperature heat exchanger (cooler) 38 and positive work is produced, the working piston 36 rotates the output shaft 7 via the rotary swash plate 28 (when the motor is driven). The same direction) works, and the direction of the current flowing in the winding 16 of the generator is reversed to enter the power generation state.

  The first feature of the Stirling engine generator according to the present invention is that eight sets of permanent magnets arranged on the outer periphery of the rotor core 9 are composed of six types of permanent magnet pieces 11 having different magnetization directions. By making it possible to reduce the number of laminated steel plates on the back that could not be constructed with radial magnetized magnets, the majority of the rotor 8 is made up of a rotor core 9 made of non-ferrous metal or polymer material having a low specific gravity. The weight is reduced and the inertial mass is extremely reduced.

  Since the rotor 8 is thus reduced in weight and the inertial mass is made extremely small, the inertial force due to the rotation can be reduced, and the rotational speed of the output shaft 7 can be quickly changed. In addition, the generated three-phase AC current If the direct current is changed with a rectifier (not shown), the inverter is turned into commercial frequency alternating current, and returned to the power system or used as a power source, the pressure and stroke of the working gas can be reduced even if the incident heat of the sun changes. There is a very remarkable effect that the power generation amount can be adjusted by changing the engine speed without changing.

  The second feature of the Stirling engine generator according to the present invention is that the boss portion of the Stirling engine drive unit block 4 in which the radial bearing 19 that rotatably supports the output shaft 7 is mounted in the recess 8g of the rotor core 9 is provided. 4a enters.

  By adopting such a configuration, the axial length of the radial bearing 19 can be made longer, and the rotor 8 and the output shaft 7 can be stably rotated.

  That is, when such a configuration is adopted, the radial bearing 19 attached to the drive housing is brought to the center point of the center of gravity of the rotary swash plate 28 and the rotor core 9 by using the recess 8g of the rotor core 9. In addition, the rotating portion including the rotor 8, the rotating swash plate 28, the output shaft 7 and the like can be stably rotated, and a remarkable effect that no vibration occurs even when the number of rotations is rapidly changed is produced.

  As mentioned above, although the form for implementing the Stirling engine generator which concerns on this invention was demonstrated based on the Example, this invention is not limited to such an Example, It was described in the claim It goes without saying that there are various embodiments within the scope of technical matters.

  Since the Stirling engine generator according to the present invention has the above-described configuration, it is optimally applied to a Stirling engine generator using solar heat that easily changes the incident heat, but other heat sources (for example, fossil fuels) It can also be applied to Stirling engine generators using wood-based fuel, geothermal heat, etc.).

DESCRIPTION OF SYMBOLS 1, 1 'Stirling engine generator 2 Actuating part block 3, 4 Drive part block 3b Boss part of the drive part block 4b Boss part of the drive part block 4 5 Generator housing 6 Lid 7 Engine output shaft 8 Rotor 8' Sleeve 8g Rotor core recess 9 Rotor core 10 Laminated steel plate 11 Permanent magnet piece 12 Rotor outer cylinder 13 Rotor lid 14 Rotor fixing nut 15 Stator 16 Generator windings 16a, 16b, 16c Generator winding Three copper wires 17 Resolver 17a Resolver rotating part 17b Resolver fixed part 18 Resolver signal line 19, 22 Radial bearing 20, 21 Thrust bearing 23 Lubricating oil supply hole 24 Oil supply pump 25 Oil discharge port 26 Oil supply Port 27 Shoe 28 Rotary swash plate 29 Guide piston 31 Piston rod 32 Shaft seat 33 Oil scraper 34 Gas seal 35 Piston ring 36 Operating piston 37 Low temperature passage 38 Low temperature heat exchanger 38 'Low temperature space 39 Regenerative heat exchanger 40 High temperature heat exchanger 40' High temperature space 41 High temperature heat exchanger housing 41a Piston cylinder 42 Fixing bolt 50, 51, 52, 53, 54, 55 Permanent magnet piece 56 Stator laminated core 57 Stator teeth 58 Stator winding space 59 Rotor cover fixing bolt 60 Generator output line 70 Ring portion 71 of drive block 4 Partition plate 72 Partition plate boss portion 73 Partition plate ring portion 74 Center hole of boss portion 75 Oil reservoir formed at the upper portion of partition plate 76 O ring 76 'O ring 77 Oil seal of rotating shaft 78 Oil discharge passage 79 Oil Discharge port 81 Oil supply hole 82 Oil supply port 83 Spacer 90 Mirror 91 Line connecting the circular center of the permanent magnet pieces of the center of rotation 102 rotor's 92 sunlight 101 rotor

Claims (8)

Each of the four piston cylinders provided in the engine part has a generator part and an engine part, and an operating piston with a piston ring is arranged in each part, and each piston cylinder is separated into a high temperature space side and a low temperature space. Each high temperature space includes a high temperature heat exchanger, a regenerative heat exchanger, and a low temperature heat exchanger, and is connected to a low temperature space of another adjacent cylinder, and each operating piston is connected to a guide piston via a rod. In each of the Stirling engine generators, each rod has a shaft seal mechanism and an output take-out mechanism that converts the reciprocating motion of the guide piston into the rotation of the output shaft of the engine.
A rotor core made of nonferrous metal or polymer material with low specific gravity is mounted on the output shaft of the engine, and a plurality of tile-shaped permanent magnet pieces are bonded to the outer periphery of the rotor core to rotate the generator. Stirling engine power generation characterized in that a rotor is formed, a rotating portion of a resolver is provided at the tip of the output shaft of the engine, and a three-phase winding stator is provided outside the rotor to generate an alternating current. Machine.   The plurality of tile-shaped permanent magnet pieces have −60 degrees, 0 degrees, +60 degrees, −120 degrees, 180 degrees, +120 degrees with respect to the line in which the N-pole direction connects the center of the rotor core and the center of the permanent magnet pieces. 6 × n permanent magnet pieces so as to form a plurality of n pairs (where n is 5, 8, or 11) in a similar arrangement. The Stirling engine generator according to claim 1, wherein the is disposed around the rotor core.   The Stirling engine generator according to claim 1 or 2, wherein a ring-shaped laminated steel plate is disposed between the rotor core and the tile-shaped permanent magnet piece to improve the formation of the magnetic field circuit.   A highly rigid sleeve is press-fitted onto the output shaft side of the rotor core, a keyway is attached to the sleeve, a stepped seating surface is created on the output shaft, and the rotor is used as the engine output shaft with the key and nut. The Stirling engine generator according to any one of claims 1 to 3, wherein the Stirling engine generator is attached so as to be detachable.   A rotor lid is arranged on one end side of the rotor core, and the permanent magnet piece bonded to the outer periphery side of the rotor core is pressed by the carbon fiber rotor outer cylinder and the rotor lid so as not to be scattered. The Stirling engine generator according to any one of claims 1 to 4.   A recess is formed on the rotor core on the engine part side, and a bearing for rotatably supporting the output shaft and a boss part of a drive block of a Stirling engine on which the bearing is mounted enter the recess of the rotor core. The Stirling according to claim 1, wherein the axial length of the bearing can be made longer, and the rotor and the output shaft can be stably rotated. Engine generator.   A partition plate fitted with an O-ring and an oil seal is attached to the drive block of the guide piston cylinder that guides the boss and guide piston, and an oil discharge passage for lubricating oil is provided in the drive block so that oil enters the generator section. The Stirling engine generator according to claim 6, wherein the Stirling engine generator is not provided.   The number of teeth of the stator core of the Stirling engine generator is set to nx with respect to the plurality of tile-shaped permanent magnet pieces forming the plurality of n pairs (where n is 5, 8, or 11). The number of the copper wires is 2 + 2, and the three copper wires are respectively wound clockwise and counterclockwise from the center to the teeth, and one of the three copper wires is connected, and one of them is used as an output lead line. The Stirling engine generator in any one of 2-7.

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