JPS63138145A - Stirling engine - Google Patents

Abstract

PURPOSE:To enable gas to be smoothly circulated, by forming a gas circulative path in its both end sides to a large clearance, in the case of a Stirling engine which forms the clearance between both inner and outer cylinders to the gas circulative path respectively connecting its one end to expansion space of a piston cylinder and the other end to a regenerator. CONSTITUTION:In the case of a Stirling engine, formed by connecting a heater 30, regenerator 40 and a cooler 50 successively in series to a plurality (for instance, five) of piston cylinders 20 arranged in a concentric circumferential state, the heater 30 is vertically provided in every several quantity (for instance, three) in five manifolds 80 arranged on a concentric circumference outside each cylinder 20. Each heater 30 is constituted of an outer cylinder 31 and an inner cylinder 32 positioned providing a predetermined space serving for a gas circulative path 33, and its inside is divided into two flow paths 33a, 33b by a partitioning wall 37. And the engine, which forms a bottom part 32b of the inner cylinder 32 into a small diameter large increasing a clearance between the bottom part 32b and the outer cylinder 31, constitutes the gas circulative path 33 so as to form large gas inflow volume in its both end sides.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a Stirling engine with an improved heater connected to a piston cylinder.

(Prior Art) Conventionally, as shown in FIG. 4, a piston cylinder 20 that is arranged at equal intervals on the same circumference and houses a movable piston 10, a heater 30, In a five-cylinder Stirling engine in which a regenerator 40 and a cooler 50 are connected, the heater 30 consists of an outer cylinder 31 and a bottomed inner cylinder 32 located with a predetermined gap from the outer cylinder 31. The gap is formed as a gas flow passage 33, the upper end of the gas flow passage 33 is connected to the expansion space A of the piston cylinder 20 via the connecting vibro 0, and the lower end of the gas flow passage 33 is connected to the upper end of the regenerator 40. A connected Stirling engine is known.

(Problems to be Solved by the Invention) In the conventional Stirling engine, since the gap between the outer cylinder 31 and the inner cylinder 32 is constant except for the lower end sides of the outer cylinder 31 and 32, the expansion The pressure of the inert gas flowing into the gas flow passage 33 from the space A via the connecting vibro 0 is attenuated at the upper end side of the gas flow passage 33, where the inflow pressure is highest, so that smooth gas flow can be achieved. could not.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention aims to provide a Stirling engine in which gas can smoothly flow from an expansion space and a regenerator to a heater.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a gap between the outer cylinder and the inner cylinder of the heater to form a gas flow passage, and one end of the gas flow passage is In a Stirling engine, the expansion space of the piston cylinder is connected to the regenerator at the other end,
A gap between the outer cylinder and the inner cylinder is formed to be large at both ends of the gas flow passage.

(Function) According to the present invention, since the gap between the outer cylinder and the inner cylinder is large at both ends of the gas flow path, the gas flowing from the expansion space and the regenerator to the heater is The inflow pressure is not attenuated at either end of the channel.

(Embodiment) FIGS. 1 to 3 show an embodiment of the present invention, and the same components as those of the conventional example are denoted by the same reference numerals. That is,
10 is five piston cylinders 2 arranged concentrically.
30 is a heater, 40 is a regenerator, 50 is a cooler, and 60 is a connecting pipe that connects each of the heaters 30 and each piston cylinder 20.

The piston cylinder 20 is installed on two pedestals 70 and 71 arranged vertically with a predetermined gap between them.
A lower cylinder 22 is provided between each of the cylinders 71 . Further, an expansion space A is provided in the upper part of the upper cylinder 21.
A compression space B is formed in the lower part of the lower cylinder 22, and the winter spaces A and B are filled with an inert gas such as Ne or He. Further, on the upper surface of the upper pedestal 70, the cylindrical regenerator 40 made of a heat exchange member, such as a layered wire mesh, is installed, and the lower end of the regenerator 40 is connected to the pedestal 70.71.
The upper end of the cooler 50 provided therebetween communicates with the lower end of the heater 30 via a manifold 80, respectively.

The heater 30 includes an outer cylinder 31 that extends vertically and is positioned with a predetermined gap therebetween, and an inner cylinder 32 with a bottom, and the gap is formed as a gas flow passage 33. Further, a plurality of heat absorption fins 34 are formed on the outer peripheral surface of the outer cylinder 31, and an outer cylinder cap 35 is attached to the upper end, and a predetermined gap C is formed between the outer cylinder cap 35 and the upper end of the inner cylinder 32. An inner cylinder cap 36 is attached to the inner cylinder cap 36.

Further, as shown in FIG. 3, a partition wall 37 is formed between the outer cylinders 31 and 32 of each heater 30 to partition the gas flow passage 33 into two gas flow sections 33a and 33b. ing. Further, the bottom of the inner cylinder 32 has an upper part 32a having a large diameter and a part (lower part) 32b below the upper part 32a having a small diameter, so that the lower part 32b and the outer cylinder 31
The gap between the gas flow passage 33 and the gas flow passage 33 is increased, and the gas inflow volume at both ends of the gas flow passage 33 is increased. A gas communication passage 38 is provided at the lower end of the manifold 80, the lower end of which communicates with a gas supply passage 81 provided at the center of the manifold 80.

Furthermore, the lower part 32b side of the gas circulation part 33a communicates with the expansion space A of the piston cylinder 20 via the connecting vibro 0.

Further, as shown in FIG. 2, the heaters 30 are arranged concentrically on the outside of each piston cylinder 20, and
Three manifolds are erected in each of the manifolds 80.

The cooler 50 consists of an outer cylinder 51 and an inner cylinder 52 that extend vertically and are positioned with a predetermined gap between them.The lower part of the inner cylinder 52 faces the cold water inlet channel 90, and the upper end has a cooler camp 53.
is installed. Further, a cold water pipe 54 extending vertically is installed at the center of the inner cylinder 52, and the lower end of the cold water pipe 54 communicates with a cooling water tank 100. Further, the lower end of the gap communicates with the compression space B of the piston cylinder 20 via the gas flow passage 110.

According to the present embodiment, the expansion space A and the compression space B of the piston cylinder 20 are defined by the connecting vibro 0, the gap C between the gas flow portions 33a1 of the heaters 30, and the gas flow portion 3.
3b, the gas communication path 38, the gas feed path 81 of the manifold 80, the regenerator 40, and the gap D between the cooler 50
, are connected in series to the gas flow passage 110, so the inert gas is heated and cooled between the expansion space A and the compression space B, and as a result, the inert gas repeatedly expands and contracts. The movable piston 10 is moved up and down.

Further, each heater 30 has - piston cylinders 2.
Since three are provided for each zero, the amount of heat absorbed increases and the output of the engine increases.

Furthermore, the gas flow passage 33 of the heater 30 is connected to a partition wall 37.
The lower end of the gas flow section 33a is connected to the connecting vibro 0, and the lower end of the gas flow section 33b is connected to the upper end of the regenerator 40 via the manifold 80. Therefore, the inert gas flowing from the connected vibro 0 flows through the gas flow section 33a.
The gas first moves from below to above the heater 30 through the gap C, then flows above the gas flow section 33b through the gap C, and then moves below the heater 30.

Therefore, the inert gas reciprocates up and down within the heater 30,
Since the journey becomes longer, the amount of heat absorbed increases.

Furthermore, since the bottom of the inner cylinder 32 of the heater 30 is provided with a lower part 32b formed to have a small diameter, and the gap with the outer cylinder 31 is increased, the inflow of gas into each of the gas circulation parts 33a and 33b is The outflow area becomes larger, allowing inert gas to enter and
The outflow can be carried out smoothly. Furthermore, since the lower end of each gas distribution section 33b is connected to the gas supply path 81 of each manifold 80 through a gas communication path 38 formed at an angle, the inert gas in the gas distribution section 33b is The water flows smoothly into the manifold 80.

(Effects of the Invention) As explained above, the present invention provides a gap between the outer cylinder and the inner cylinder of the heater to form a gas flow passage, and one end of the gas flow passage is connected to the expansion space of the piston cylinder. In the Stirling engine, the other end of which communicates with the regenerator, the gap between the outer cylinder and the inner cylinder is formed large at both ends of the gas flow passage, so that the expansion space and the regenerator are connected to the heater. The flowing gas has the advantage that the inflow pressure is not attenuated at both ends of the gas flow path, allowing smooth gas flow and improving the output of the engine.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 to 3 show an embodiment of the present invention. FIG. 1 is a sectional view of a Stirling engine according to the present invention, and FIG. 2 is a sectional view of a Stirling engine according to the present invention. Fig. 3 is a partial cross-sectional plan view of Fig. 1.
The figure is a cross-sectional view of a conventional Stirling engine. In the figure, 20...piston cylinder, 30...heater, 31...outer cylinder, 32...inner cylinder, ? 3... Gas flow path, 33a, 33b... Gas flow section, 37... Partition wall, 40... Regenerator, A... Expansion space.

Claims (2)

[Claims] (1) A star ring in which a gap is provided between the outer cylinder and the inner cylinder of the heater to form a gas flow passage, and one end of the gas flow passage communicates with the expansion space of the piston cylinder and the other end communicates with the regenerator. A Stirling engine, wherein a gap between the outer cylinder and the inner cylinder is formed to be large at both ends of the gas flow passage. (2) A patent characterized in that a manifold is provided to connect the heater and the regenerator, and the gas supply path of the manifold communicates with the other end of the gas flow path via an inclined gas communication path. A Stirling engine according to claim 1.