JPH0599069A - Coupling structure of cylinder and heater housing for stirling engine - Google Patents

Abstract

PURPOSE:To allow a cylinder for a stirling engine to be easily assembled and to prevent gas leak. CONSTITUTION:A guide ring 27 and seal rings 25, 26 having an outer peripheral diameter which is larger than the inner peripheral diameter of the coupling inner peripheral face of a heater housing 13 are disposed on the coupling outer peripheral face 14a of a cylinder 14. Therefore, the heater housing and the cylinder can be divided at any time and be easily assembled. In addition, the interference fit of the housing and cylinder prevents the cylinder from being moved and the seal rings from being abraded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a cylinder of a Stirling engine and a heater housing.

[0002]

2. Description of the Related Art Various conventional techniques for connecting a cylinder of a Stirling engine and a heater housing have been proposed, including those shown in FIGS.

First, in the prior art shown in FIG. 4, the joint inner peripheral surface 51a of the heater housing 51 and the joint outer peripheral surface 52a of the cylinder 52 are joined by nickel brazing.

Further, in the prior art shown in FIG. 5, two seal rings 53, 5 are provided on the coupling outer peripheral surface 52a of the cylinder 52.
4, the inner peripheral surface 5 of the joint of the heater housing 51 is disposed.
1a is inserted and bound.

[0005]

However, in the prior art shown in FIG. 4, the brazing process requires a high cost and the heater housing 51 and the cylinder 52 cannot be separated after the brazing. Therefore, if the assemblability to the later-described complex sub-block 55 is poor, there is a problem.

On the other hand, according to the prior art shown in FIG. 5, the heater housing 51 and the cylinder 52 can be separated from each other, and the assembling to the complex sub-block 55 is excellent. However, the clearance 56 between the heater housing 51 and the cylinder 52, the cylinder 52 and the compressor lock 55,
Since there is a clearance 57 between the cylinder 52 and the combined outer peripheral surface 52a of the cylinder 52 and the combined inner peripheral surface 51a of the heater housing 51, the cylinder 52 moves in the axial direction and the circumferential direction during operation of the Stirling engine, and the seal is generated. If the working gas leaks due to the wear of the rings 53 and 54, there is a problem.

Therefore, it is a technical object of the present invention to improve the assemblability of the cylinder of the Stirling engine and prevent gas leakage.

[0008]

[Constitution of the invention]

[0009]

The technical means of the present invention taken to solve the above-mentioned technical problems of the present invention is a heater housing and a cylinder in which a piston slides and is integrally connected. In the existing Stirling engine, after the seal ring and the guide ring are arranged on the coupling outer peripheral surface of the cylinder, the coupling inner peripheral surface of the heater housing is inserted to form an interference fit, and the outer diameter of the guide ring is coupled to the heater housing. That is, it was made larger than the inner diameter of the inner peripheral surface.

[0010]

According to the above-mentioned technical means of the present invention, the heater housing and the cylinder can be separated, and the guide ring suppresses the movement of the cylinder in the axial direction and the circumferential direction.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the technical means of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a Stirling engine 10
The expansion space 11 and the compression space 12 are defined by a piston 15 which slides on the inner peripheral surfaces of the heater housing 13 and the cylinder 14 which are integrated. A plurality of piston rings 16 are arranged on the outer circumference of the piston 15.

The expansion space 11 and the compression space 12 are heating tubes 1
7, the regenerator 18 and the cooler 19 are connected, and the working gas enclosed therein moves back and forth between the expansion space 11 and the compression space 12 by the reciprocating movement of the piston 15. The above components are fixed to the block 24. The heater housing 13 and the heating pipe 17 face the combustion space 20, and are heated by the combustion flame 23 of the fuel and air supplied by the fuel injector 21 and the swirler 22.

In the Stirling engine 10 having the above structure, the connecting structure of the heater housing 13 and the cylinder 14 will be described with reference to FIGS.

That is, after the two seal rings 25 and 26 and the guide ring (made of, for example, tetrafluoroethylene) 27 are arranged on the joint outer peripheral surface 14a of the cylinder 14, the joint inner peripheral surface 13a of the heater housing 13 is arranged. Insert and combine. Here, since the outer peripheral diameter of the guide ring 27 is larger than the inner peripheral diameter of the combined inner peripheral surface 13a of the heater housing 13, the heater housing 13 and the cylinder 14 are an interference fit. Therefore, even when the piston 15 reciprocates,
Accordingly, the cylinder 14 does not move in the axial direction or the circumferential direction, and the seal rings 25 and 26 are not worn.
Leakage of working gas to the outside can be prevented.

[0016]

As described above, in the Stirling engine cylinder of the present invention, the heater housing and the cylinder can be separated from each other, and therefore the assembling property is excellent. Further, since the guide ring suppresses the movement of the cylinder in the axial direction and the circumferential direction, the seal ring is prevented from being worn and the working gas of the Stirling engine does not leak.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a coupling structure of a cylinder and a heater housing of a Stirling engine engine according to an embodiment of the present invention.

FIG. 2 shows an enlarged cross-sectional view of a main part in FIG.

FIG. 3 shows an enlarged detailed view of a main part in FIG.

FIG. 4 is a cross-sectional view of a main part of a coupling structure of a cylinder and a heater housing of a conventional Stirling engine engine.

FIG. 5 is a cross-sectional view of a main part of a coupling structure of a cylinder and a heater housing of a conventional Stirling engine engine.

[Explanation of symbols]

 13 heater housing, 13a coupling inner peripheral surface, 14 cylinder, 14a coupling outer peripheral surface, 15 piston, 10 Stirling engine, 25, 26 seal ring, 27 guide ring.

Claims (1)

[Claims] 1. A Stirling engine having a heater housing and a cylinder in which a piston slides and is integrally connected, wherein the heater housing is provided after disposing a seal ring and a guide ring on the connecting outer peripheral surface of the cylinder. The inner diameter of the coupling ring is a tight fit, and the outer diameter of the guide ring is larger than the inner diameter of the inner coupling surface of the heater housing. Bond structure.