JP2008101477A - Stirling engine generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a Stirling engine in which a rotating force takeout mechanism is made free from oil by reducing a thrust force applied from a piston or a cross head to a cylinder and reduced in size. <P>SOLUTION: This Stirling engine generator comprises the rotating force takeout mechanism 4 for converting the reciprocating motion of the piston into the rotating motion thereof, a crankcase 5 in which a compression cylinder 2 is disposed, and an expansion cylinder block 10 joined airtight onto the crankcase 5 and forming an expansion cylinder 3 in cooperation with the crankcase 5. The rotating force takeout mechanism 4 comprises a T-shaped yoke 21 and a rocker arm 22. The T-shaped yoke 21 is so formed that its top part 23 is rotatably pivoted eccentrically to a crankshaft 24, and the lower front and rear ends 28, 29 are connected to the pistons 8, 12 of the compression cylinder 2 and the expansion cylinder 3 through connecting rods 9, 13, respectively. The rocker arm 22 is so formed that its one end 25 is pivoted on the crankcase, and the other end 26 is pivoted on the lower center 27 of the T-shaped yoke 21. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a generator using a Stirling engine.

  In recent years, a Stirling engine has attracted attention as an engine suitable for energy saving and improvement of the global environment. The Stirling engine has high thermal efficiency, is an external combustion engine, has excellent silence, and can use various fuels. Therefore, the Stirling engine is optimal as a power source for a stationary or portable generator.

  A Stirling engine encloses a pressurized working gas and reciprocates a piston by a pressure difference generated between a high temperature chamber and a low temperature chamber in a cylinder heated by a combustor or the like, and uses this reciprocating driving force as an energy source. As a power device to be taken out.

  There are various types of Stirling engine configurations, but it has a compression cylinder and an expansion cylinder each including a compression chamber and an expansion chamber, and rotates the reciprocating motion of a piston that reciprocates in the compression cylinder and the expansion cylinder. A configuration is known in which a rotational force extraction mechanism that converts force into force is provided, and a crankcase in which the rotational force extraction mechanism is disposed is hermetically coupled to a compression cylinder and an expansion cylinder (see Patent Document 1). The inside of the crankcase is opened to the atmosphere or filled with a working gas and maintained at an appropriate pressure.

JP2005-351243

The conventional Stirling engine has the following problems.
(1) The piston or the cross head that reciprocates between the compression cylinder and the expansion cylinder is affected by the rotational action of the rotational force extraction mechanism via the connecting rod, so that the piston or the cross head and the cylinder or the cross head guide are not affected. Thrust force is generated on the surface, and smooth reciprocation is hindered.

(2) In the rotational force extraction mechanism in the crankcase, when lubricating oil is used to reduce the thrust force and operate the rotating sliding portion smoothly, a mechanism for sealing the lubricating oil (rod Depending on the state of the sealing mechanism, lubricating oil may enter the compression cylinder and expansion cylinder (rising oil), causing seizure in the heater tube and cylinder, and Also, it stays in the regenerator or in the cooler, causing engine performance to deteriorate.

(3) When the Stirling engine is applied to a generator, it is usually sufficient to simply connect the rotating shaft for output of the Stirling engine to the generator, but the engine and the generator must be provided separately. The device configuration becomes large. The Stirling engine is preferably provided with a buffer (tank) in order to minimize the pressure on the back side of the piston (the fluctuation of the back pressure of the piston) as much as possible.

  The present invention aims to solve the above-mentioned conventional problems, reduces the thrust force generated between the piston or cross head and the cylinder or cross head guide, and does not use grease lubrication or oil lubrication. Realizes a rotational force extraction mechanism. Also, when grease lubrication or oil lubrication is used, leakage of grease or oil from the rotational force extraction mechanism is prevented. It is another object of the present invention to realize a compact Stirling engine generator even with a buffer.

  In order to solve the above-mentioned problems, the present invention provides a Stirling engine generator including a crankcase provided with a rotational force extraction mechanism for converting a reciprocating motion of a piston into rotation. The rotational force extraction mechanism includes a saddle yoke and a rocker. An upper end of the saddle-shaped yoke is rotatably attached to a rotary output shaft; a lower portion is connected to a piston via a connecting rod; and the rocker arm has one end There is provided a Stirling engine generator characterized in that it is pivotally attached to a crankcase and the other end is pivotally attached to the lower center of the saddle yoke.

  In order to solve the above problems, the present invention is coupled to a rotational force take-out mechanism that converts reciprocating motion of a piston into rotation, a crankcase in which a compression cylinder is disposed, and an airtight coupling on the crankcase, In a Stirling engine generator having an expansion cylinder block that forms an expansion cylinder together with a crankcase, the rotational force extraction mechanism includes a saddle yoke and a rocker arm, and the upper end of the saddle yoke has a rotational output. It is eccentrically attached to the shaft and is rotatably attached, and both lower ends are connected to the pistons of the compression cylinder and the expansion cylinder via connecting rods, respectively, and the rocker arm is pivotally attached to the crankcase. A Stirling engine generator characterized in that the other end is pivotally attached to the lower center of the saddle yoke. Subjected to.

  The expansion cylinder block preferably has a structure in which a heater tube is attached to the top of the expansion cylinder block, a regenerator is provided, and a cooler is provided in the crankcase.

  The expansion cylinder block is preferably provided with a heater tube at the top and a regenerator and a cooler.

  An expansion cylinder block and a compression cylinder block are provided in the upper part of the crankcase, and an expansion cylinder is formed in the expansion cylinder block. A compression cylinder is formed in the compression cylinder block, and a regenerator and a cooler are provided in the compression cylinder. It is preferable to adopt the configuration described above.

  It is preferable that the left and right side cases are airtightly attached to the crankcase on both the left and right sides of the crankcase, and the generator is disposed in the space of the side cases on both sides.

  Left and right side cases are airtightly attached to the crankcase on both the left and right sides of the crankcase, and a generator is disposed in the space of one side case, and the other side case is a compression piston. It is preferable that the buffer space absorbs pressure fluctuations on the back side of the expansion piston.

  In the rotational force take-off mechanism, a bearing is provided at a rotational sliding portion between a shaft or pin and a rotating member, and the bearing is coated with a resin bushing and a lubricant (resin, metal, ceramic, etc.) coating It is preferable to use a rolling bearing in which a bush, grease or solid lubricant is enclosed.

  In the rotational force extraction mechanism, a lubrication bearing (white metal, bronze alloy, aluminum alloy, etc.) provided in a rotational sliding portion between a shaft or pin and the rotational member is provided. A through hole communicating with the bearing is formed, and it is preferable that the through hole be provided with a filter that allows the working gas to pass but not the lubricant.

  An upper lid for partitioning the expansion cylinder and the crank chamber is provided at the upper part of the crankcase, and a metal seal with a resin coating on the inner surface that is in sliding contact with the piston rod and a rod seal made of an O-ring or resin seal on the outer side are provided on the upper lid. It is preferable that the cooler lower manifold and the expansion piston back space communicate with each other and further communicate with the compression space.

  The Stirling engine generator according to the present invention has the following effects.

(1) Since a loss yoke mechanism comprising a saddle yoke and a rocker arm is employed as the rotational force extraction mechanism, the following effects are produced.
I. Since the straight reciprocity of the reciprocating motion of the piston can be obtained and the smooth reciprocating motion can be secured, the thrust force acting between the piston and the cross head and the cylinder or the cross head guide is reduced, and the oil-free operation is possible.
B. Since the crank can be made one (becomes a one-throw crankshaft), the crankshaft can be easily processed and the cost can be reduced.
C. The rotational force take-out mechanism is entirely compact.

(2) By providing the cooler in the crankcase, the crankcase can be cooled, and the engine portion can be made compact by forming the working gas passage in the side wall of the compression cylinder. Furthermore, a Stirling engine generator can be made into a compact structure by providing a side case in the both sides or one side of a crankcase, and arrange | positioning a generator in this. The side case can also be used as a buffer space.

(3) Oil-free, grease or solid lubricant can be used by using a resin bushing and a metal bushing coated with a lubricant (resin, metal, ceramic, etc.) as bearings on the rotating sliding part of the connecting rod and crank. Oil-less is possible by using the enclosed rolling bearing.

(4) Grease lubrication or oil on bearings (resin bushes, metal bushes with lubricant coating, or metal bushes made of white metal, bronze alloy, aluminum alloy, etc.) at the rotating and sliding parts of the connecting rod and crank When lubrication is used, leakage of grease and oil can be prevented by providing a lubricant holding mechanism and a filter. And the effect of reduction of mechanical loss, reduction of vibration and noise, and improvement of durability occurs.

  The best mode for carrying out a Stirling engine generator according to the present invention will be described below with reference to the drawings based on the embodiments.

  1 and 2 show an overall configuration of a Stirling engine generator according to a first embodiment of the present invention. FIG. 1 is a cross-sectional view seen from the front side, and FIG. 2 is a cross-sectional view seen from the side. 1 and 2, the Stirling engine generator 1 includes a compression cylinder 2, an expansion cylinder 3, and a rotational force extraction mechanism 4.

  The compression cylinder 2 is formed on the front side of the upper part of the crankcase 5 that accommodates the rotational force take-out mechanism 4, and is sealed with an upper lid 6. The compression cylinder 3 is provided with a compression piston 8 integral with the crosshead 7 so as to be reciprocally movable. A connecting rod 9 is pivotally attached to the crosshead 7.

  The expansion cylinder 3 is formed by the rear side of the upper part of the crankcase 5 and the expansion cylinder block 10. The expansion cylinder block 10 is airtightly fixed to the upper surface of the crankcase 5 with respect to the crankcase 5.

  The expansion cylinder 3 is provided with an expansion piston 12 integrated with a cross head 11 so as to be able to reciprocate. A connecting rod 13 is pivotally attached to the cross head 11. The expansion piston 12 moves ahead of the compression piston 8 by a phase of approximately 90 degrees.

  A heater tube 15 is provided on the expansion cylinder head 14 which is the top of the expansion cylinder block 10 so as to be heated by a heater (a gas burner or the like). Further, the expansion cylinder block 10 is provided with a regenerator 16 located around the expansion cylinder 3.

  A cooler 17 is disposed on the rear upper part of the crankcase 5 so as to be located around the expansion cylinder 3. Then, working gas passages 18 and 18 ′ are formed to communicate with the compression cylinder 2 and one end side of the lower manifold 17 ′ of the cooler 17 and serve as working gas passages. In short, the cooler 17 is provided in the crankcase 5, and the working gas passage 18 is connected to the side wall of the compression cylinder 2, which also serves as the cooler lower manifold 17 ′ and the loss head guide, and the working manifold 18 ′ and the working gas passage 18 are communicated. By forming the gas passage 18 ′, the height of the engine portion can be reduced and the engine can be made compact.

  The expansion space 19 that is a space above the piston of the expansion cylinder 3, the heater tube 15, the regenerator 16, the cooler 17, the manifold 17 ′, the working gas passages 18 and 18 ′, and the compression space that is the space above the piston of the compression cylinder 2. 20 are in communication with each other.

  In the compression cylinder 2, the expansion cylinder 3, and the crankcase 5, for example, helium, hydrogen, nitrogen or the like is sealed as a working gas. The working gas can reciprocate between the compression cylinder 2 and the expansion cylinder 3 through the heater tube 15, the regenerator 16, the cooler 17, the manifold 17 ′, and the working gas passages 18 and 18 ′. .

  In the Stirling engine generator 1 having the above configuration, the working gas is compressed by the compression piston 8 in the compression space 20, and passes through the working gas passages 18, 18 ′, the manifold 17 ′, the cooler 17, and the regenerator 16. When passing through the heater tube 15, it is heated by the heater to become high temperature and high pressure and enters the expansion space 19 of the expansion cylinder 3, where the working gas expands and pushes the expansion piston 12 downward.

  When the expansion piston 12 returns upward, the working gas flows from the expansion space 19 to the heater tube 15, the regenerator 16, and the cooler 17 (the working gas is cooled to low temperature and low pressure), the manifold 17 ', and the working gas. It passes through the passages 18, 18 ′ and returns into the compression space 20 of the compression piston 8.

  When such a series of operations are performed, the force that pushes down the expansion piston 12 downward by the working gas is extracted as a rotational force by the rotational force extraction mechanism 4, and the generator generates electric power by using this rotational force.

  A characteristic configuration of the present invention in the Stirling engine generator 1 having the above configuration will be described. In the present invention, a loss yoke mechanism composed of a saddle-shaped yoke and a rocker arm is employed as the rotational force extraction mechanism.

  That is, the rotational force take-out mechanism 4 includes a saddle yoke 21 and a rocker arm 22. The saddle yoke 21 has an upper portion 23 rotatably attached to a crank eccentric shaft 24 'and is eccentric to the crankshaft 24. It is mounted for rotation. One end 25 of the rocker arm 22 is pivotally attached to the crankcase 5, and the other end 26 is pivotally attached to the lower center 27 of the yoke 21.

  The connecting rod 13 whose upper end is rotatably attached to the cross head 11 of the expansion piston 12 has its lower end pivoted to one side end (front end 28) of the front and rear of the bowl-shaped yoke 21. The connecting rod 9 whose upper end is pivotally attached to the cross head 7 of the compression piston 8 is pivotally attached to the front and rear other ends (rear end 29) of the saddle yoke 21. Accordingly, the expansion piston 12 reciprocates (in the vertical direction in the linear direction) inside the expansion cylinder lower part 3 'that also serves as a crosshead guide. Similarly, the compression piston 8 reciprocates inside the compression cylinder 2 that also serves as a crosshead guide (up and down movement in the linear direction).

  According to the rotational force extracting mechanism 4 having such a structure, the compression piston 8 and the expansion piston 12 are pivotally attached to the crank eccentric shaft 24 ′ of the saddle yoke 21 by the reciprocating motion in the linear direction (the vertical movement in the linear direction). The bowl-shaped yoke upper part 23 rotates around the crankshaft 24. At the same time, the vertical movement of the saddle yoke lower portion 27 is restricted by the rocker arm 22 in the left-right direction, so that the vertical movement of the vertical yoke is substantially linear, and the front end 28 of the vertical yoke and the rear end 29 of the vertical yoke also move up and down.

  Further, the movement of the compression piston 8 and the expansion piston 12 in the linear direction causes some lateral blurring at the pivotal attachment portions (28, 29) of the bowl-shaped yoke 21 and the connecting rod, but compared to the length of the connecting rod. Is negligible. Therefore, the compression piston 8 and the expansion piston 12 are calculated from the relationship between the thrust force against the compression cylinder 2 and the expansion cylinder lower part 3 ′ (lateral displacement of both end portions (28, 29) of the saddle yoke 21 and the length of the connecting rod). ) Hardly occurs.

  In the rotational force extracting mechanism 4 in FIG. 2, the pivoting portion between the connecting rods 9, 13 and the saddle yoke 21, the pivoting portion between the rocker arm 22 and the saddle yoke 21, and the pivot between the saddle yoke 21 and the crankshaft 24. The wearing portion or the like is configured as a rotary sliding portion 32 in which the rotating member and the pivot shaft can rotate with respect to each other. In the present invention, such a rotary sliding portion 32 is provided with a lubrication mechanism.

  An example of the lubrication mechanism will be described in detail with respect to a rotary sliding portion 32 that is a pivot joint portion of the saddle-shaped yoke 21 and the rocker arm 22 as shown in FIG. In the center 27, a bearing 34 is provided for improving the rotation (swinging motion) of the pivot shaft 31 for pivotal attachment with the rocker arm 22. Use a metal bushing coated with an agent (resin, metal, ceramic, etc.), a rolling bearing in which grease or solid lubricant is enclosed.

  Next, FIG. 3B in the case of using grease lubrication or oil lubrication will be described. A bearing (bush) 34 is provided between two oil seals 33 provided on a pivot shaft (pin) 31 in the rotary sliding portion 32. The bearing 34 is a bearing made of a resin bush, a metal bush whose inner surface is coated with a lubricant (resin, metal, ceramic, etc.), general white metal, bronze alloy, aluminum alloy or the like.

  A hole 31 'is formed in the pivot shaft (pin) 31, and a lubricant (grease, oil, etc.) is held in the hole 31'. On the other hand, the bowl-shaped yoke 21 has an L-shaped through hole 35 opened on the side surface thereof, and the through hole 35 communicates with the air hole 31 ′ through a through hole 36 formed in the bearing 34. A filter 37 that allows the working gas to pass but not the lubricant is provided in the through hole 35.

  A lubricant is appropriately supplied to the bearing 34 from the inside of the hole 31 ′ through the through hole 36. The working gas can pass through the filter 37 and pressure is applied to the lubricant. Since the filter 37 is inserted into the through hole 35, the lubricant does not leak through the through hole 36 and the through hole 35. Such a configuration has the effect of reducing mechanical loss, reducing vibration and noise, and improving durability.

  FIG. 3C is a diagram showing another aspect of the lubrication mechanism. In this lubrication mechanism, a ring-shaped lubricant holding reservoir 34 ′ is provided in a mounting space for bearings (bushings) 34. Also in this lubrication mechanism, an L-shaped through hole 35 is formed as described above, and this through hole 35 communicates with the lubricant holding reservoir 34 '.

  Further, as shown in FIG. 1, the Stirling engine generator according to the present invention is characterized in that the left and right side cases 38 are fixed to the left and right sides of the crankcase 5 so as to protrude, and the left and right sides are sealed. The space 39 is formed. A generator 40 is disposed in a space 39 in the left and right side cases 38.

  The generator 40 is an outer rotor type generator, and is a known generator in which a rotor 41 is attached to the crankshaft 24 of the rotational force extraction mechanism 4 and the rotor 41 rotates with respect to the stator 42.

  Since such a generator 40 is provided in the space 39 of the side case 38 on both the left and right sides of the crankcase 5, the entire Stirling engine generator 1 of the present invention is extremely compact. Moreover, since it is an outer rotor type generator, a rotor has a flywheel effect and a flywheel is unnecessary.

  In the present embodiment, the generator 40 is provided in the space 39 of the left and right side cases 38 of the rotational force extraction mechanism 4, but as shown in FIG. The generator 40 may be provided only in the space 39 of the one side case 38, and the other space may be used as the buffer space 39 ′.

  When the other space is used as the buffer space 38 ′ in this way, a large space can be used as a buffer, and therefore the pressure fluctuation on the back pressure side (rotation force extraction mechanism 4 installation side) of the compression piston 8 and the expansion piston 12 is sufficiently absorbed. It becomes possible.

  For reference, a buffer tank of a conventional Stirling engine generator is shown in FIG. 4B. Such a conventional buffer tank 49 is provided so as to protrude from the back pressure portion of the expansion piston 12. Therefore, there is a problem of lack of compactness, but a buffer space 39 ′ as shown in FIG. 4A is provided, and the configuration is extremely compact and smart.

  Further, since the Stirling engine generator 1 of the first embodiment is configured such that the cooler 17 is disposed around the expansion cylinder 3 of the crankcase 5, the height of the Stirling engine generator 1 is reduced. The structure can be made compact.

  5 and 6 are diagrams for explaining a second embodiment of the Stirling engine generator according to the present invention. The Stirling engine generator 43 of the second embodiment has substantially the same configuration as that of the first embodiment, but a characteristic configuration different from that of the first embodiment will be described below.

  In the second embodiment, the expansion cylinder block 10 is formed longer (higher) than the first embodiment and is mounted on the crankcase 5 via the upper lid block 44. As in the first embodiment, a heater tube 15 is provided on the expansion cylinder head 14 of the expansion cylinder block 10 so as to be heated by the heater.

  In the expansion cylinder block 10, a regenerator 16 and a cooler 17 are sequentially arranged around the expansion cylinder 3 in the vertical direction. The crankcase 5 is provided with a crosshead guide 45. The crosshead 11 reciprocates in the crosshead guide 45, and the expansion piston 12 connected to the crosshead 11 via the piston rod 46 expands. The cylinder 3 reciprocates. A connecting rod 13 is connected to the cross head 11, and one end of the connecting rod 13 is pivotally attached to the saddle yoke 21.

  The upper lid block 44 is formed with a manifold 47 that communicates the cooler lower manifold 47 ′ with the compression space 20 of the compression cylinder 2. Thereby, the expansion space 19 of the expansion cylinder 3, the heater tube 15, the regenerator 16, the cooler 17, the manifolds 47 and 47 ', and the compression space 20 of the compression cylinder 2 are in communication with each other.

  In the second embodiment, since the expansion cylinder block 10 is formed long and the regenerator 16 and the cooler 17 are disposed therein, the side wall of the expansion cylinder block 10 corresponding to the connecting portion between the regenerator 16 and the cooler 17 is thinned. Therefore, the loss due to heat conduction from the upper part of the expansion cylinder block 10 as the heating part to the cooling water of the cooler 17 is reduced, and the thermal efficiency is improved.

  In the second embodiment, the upper lid block 44 is formed with the manifold 47 that communicates the cooler manifold 47 'and the compression space 20 of the compression cylinder 2, so that the distance between the manifolds 47 can be shortened and the operation can be performed. Gas flow resistance is reduced and dead volume can be reduced, improving engine performance.

  7 and 8 are diagrams illustrating a third embodiment of the Stirling engine generator according to the present invention. The Stirling engine generator according to the third embodiment has substantially the same configuration as that of the first embodiment, but a configuration different from that of the first embodiment will be described below.

  In the third embodiment, an expansion cylinder block 50 and a compression cylinder block 50 ′ are fixed above the crankcase 5. The expansion cylinder block 50 (the right side in FIG. 7) forms the expansion cylinder 3 together with the upper part of the crankcase 5, and the compression cylinder block 50 ′ (the left side in FIG. 7) connects the compression cylinder 4 together with the upper part of the crankcase 5. Form.

  A regenerator 16 and a cooler 17 are provided above the compression space 20 of the compression cylinder 2 from above. A manifold 51 communicating with the expansion space 19 of the expansion cylinder 3 and a manifold 52 communicating with the regenerator 16 are formed at the tops of the expansion and compression cylinder blocks 50 and 50 ′, respectively. A heater tube 15 communicating between the two manifolds 51 and 52 is attached to the top (cylinder head) of the expansion and compression cylinder blocks 50 and 50 '.

  The working gas compressed in the compression space 20 passes through the cooler 17, the regenerator 16, the manifold 52 and the manifold 51, is heated by the heater tube 15, enters the expansion space 19 from the manifold 52, and presses the expansion piston 12. Thus, the rotation output can be taken out via the rotation take-out mechanism 4.

  FIG. 9 is a diagram for explaining a fourth embodiment of the Stirling engine generator according to the present invention. The Stirling engine generator of the fourth embodiment has substantially the same configuration as that of the second embodiment, but a configuration different from that of the second embodiment will be described below.

  In the fourth embodiment, a sealing lid 53 is provided at the lower end of the expansion cylinder 3 in the upper part of the crankcase 5, and a rod seal 54 is provided between the sealing lid 53 and the piston rod 46. It is characterized in that openings 59, 60, 60 ′ communicating with the expansion piston back space 58 are provided in the lower part of the expansion cylinder 3.

  The rod seal 54 is conventionally provided with a resin seal (bush) 55 as shown in FIG. 9B. In the present invention, the rod seal 54 is provided on the inner sliding surface as shown in FIG. 9C. It consists of a metal seal 56 with resin coating and an O-ring 57 provided on the outside thereof. Furthermore, it is good also as a structure which gives resin coating to the piston rod 46. FIG.

  Also, two unidirectional resin seals may be provided instead of the O-ring 57. By providing the rod seal 54 having such a structure, sliding resistance of the rod seal portion is reduced and durability is improved. In addition, the gap between the outer periphery of the metal seal 56 and the sealing lid 53 can suppress the influence of lateral vibration of the piston rod 46 caused by the expansion piston 12.

  As described above, the best mode for carrying out the terling engine generator according to the present invention has been described based on the embodiments. However, the present invention is not limited to such embodiments, and is described in the claims. It goes without saying that there are various embodiments within the technical scope. For example, the saddle yoke may be pivoted with the rocker arm at the top and pivoted with the crankshaft at the bottom.

  Since the present invention is configured as described above, the Stirling engine generator with a built-in generator has a good thermal efficiency and mechanical efficiency, and is compactly formed. Further, a saddle yoke is provided to reduce the thrust force to the cylinder. However, since it may be oil-free, it is extremely useful not only as a stationary engine generator but also as a lightweight, small portable engine generator.

It is sectional drawing seen from the front side explaining Example 1 of this invention. It is sectional drawing seen from the side surface explaining Example 1 of this invention. It is a figure explaining the principal part of Example 1 of this invention. It is sectional drawing seen from the front side explaining the modification of Example 1 of this invention. It is sectional drawing seen from the front side explaining Example 2 of this invention. It is sectional drawing seen from the side surface explaining Example 2 of this invention. It is sectional drawing seen from the front side explaining Example 3 of this invention. It is sectional drawing seen from the side surface explaining Example 3 of this invention. It is sectional drawing seen from the side side explaining Example 4 of this invention, and the figure explaining the principal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirling engine generator 2 Compression cylinder 3 Expansion cylinder 3 'Expansion cylinder lower part 4 Rotational force taking-out mechanism 5 Crankcase 6 Upper lid 7 Crosshead 8 Compression piston 9 Connecting rod 10 Expansion cylinder block 11 Crosshead 12 Expansion piston 13 Connecting rod 14 Expansion cylinder head DESCRIPTION OF SYMBOLS 15 Heater tube 16 Regenerator 17 Cooler 17 'Manifold 18, 18' Working gas passage 19 Expansion space 20 Compression space 21 Vertical yoke 22 Rocker arm 23 Upper part of vertical yoke 24 Crankshaft 24 'Crank eccentric shaft 25 Rocker arm One end 26 The other end of the rocker arm 27 The lower center of the saddle yoke 28 The front end of the saddle yoke 29 The rear end of the saddle yoke 30 Crank 31 Pivot shaft (pin)
31 'Hole 32 Rotating sliding part 33 Oil seal 34 Bearing (bush)
35 Through-hole 36 Through-hole 37 Filter 38 Side case 39 Side case space 39 'Buffer space (side case space)
40 Generator 41 Rotor 42 Stator 43 Stirling Engine Generator 44 of Example 2 Upper Cover Block 45 Crosshead Guide 46 Piston Rod 47, 47 ′, 51, 52 Manifold 49 Buffer Tank 50 Expansion Cylinder Block 50 ′ Compression Cylinder Block 53 Sealing Lid 54 Rod seal 55 Resin seal 56 Metal seal 57 O-ring 58 Expansion piston back space 59 Opening 60, 60 'Opening

Claims (10)

In a Stirling engine generator equipped with a crankcase for installing a rotational force extraction mechanism that converts the reciprocating motion of the piston into rotation,
The rotational force take-out mechanism includes a saddle yoke and a rocker arm,
The saddle-shaped yoke has an upper end eccentrically attached to a rotation output shaft and is rotatably attached, and a lower part is connected to a piston via a connecting rod,
One end of the rocker arm is pivotally attached to the crankcase, and the other end is pivotally attached to the lower center of the saddle yoke. A rotational force take-out mechanism that converts the reciprocating motion of the piston into rotation, a crankcase in which a compression cylinder is disposed, and an expansion cylinder block that is airtightly coupled to the crankcase and forms an expansion cylinder with the crankcase In a Stirling engine generator having
The rotational force take-out mechanism includes a saddle yoke and a rocker arm,
The saddle-shaped yoke has an upper end eccentrically attached to the rotation output shaft and is rotatably attached, and both lower ends are connected to the pistons of the compression cylinder and the expansion cylinder via connecting rods,
One end of the rocker arm is pivotally attached to the crankcase, and the other end is pivotally attached to the lower center of the saddle yoke.   The expansion cylinder block has a heater tube attached to the top thereof, a regenerator, a cooler in the crankcase, and an annular manifold at the lower part of the cooler. The Stirling engine generator according to claim 2.   2. The expansion cylinder block according to claim 1, wherein a heater tube is attached to the top of the expansion cylinder block, a regenerator and a cooler are provided, and a manifold having a large cross-sectional area is provided at a lower portion of the cooler. The Stirling engine generator according to 2.   An expansion cylinder block and a compression cylinder block are provided in the upper part of the crankcase, and an expansion cylinder is formed in the expansion cylinder block. Similarly, a compression cylinder is formed in the compression cylinder block. The compression cylinder includes a regenerator and a cooler. The Stirling engine generator according to claim 2, wherein the Stirling engine generator is provided.   The left and right side cases are airtightly attached to the crankcase on both left and right sides of the crankcase, and a generator is disposed in the space of the side cases on both sides. The Stirling engine generator according to any one of 5.   Left and right side cases are airtightly attached to the crankcase on both the left and right sides of the crankcase, and a generator is disposed in the space of one side case, and the other side case is a compression piston. The Stirling engine generator according to claim 1, wherein the Stirling engine generator is a buffer space that absorbs pressure fluctuations on the back side of the expansion piston. In the rotational force take-out mechanism, a bearing is provided in a rotary sliding part between the shaft or pin and the rotary member,
The Stirling engine generator according to any one of claims 1 to 7, wherein the bearing is a resin bush, a metal bush provided with a lubricant coating, a rolling bearing enclosing grease or a solid lubricant. . In the rotational force take-out mechanism, as a bearing of the rotary sliding portion between the shaft or pin and the rotary member, a resin bush, a metal bush with a lubricant coating, or a metal bush made of white metal, bronze alloy, aluminum alloy Provided,
The rotating member is formed with a through hole communicating with the bearing, and the through hole is provided with a filter that allows working gas to pass but not grease or lubricating oil. The Stirling engine generator according to any one of claims 1 to 7.   An upper lid for partitioning the expansion cylinder and the crank chamber is provided at an upper portion of the crankcase, and a rod seal comprising a metal seal having a resin coating applied to an inner surface thereof in sliding contact with the piston rod and an outer O-ring or a resin seal is provided on the upper lid. The Stirling engine generator according to claim 2 or 4, wherein the Stirling engine generator is provided, wherein the lower manifold of the cooler communicates with the space behind the expansion piston and further communicates with the compression space.