KR900009311Y1 - Piston having compression seal ring - Google Patents

Abstract

No content.

Description

Spaceless piston with self-sealing compression ring

1 is an exploded perspective view of a center cut showing a conventional piston structure.

2 is an enlarged cross-sectional view showing main parts of the piston ring of FIG.

3 is a partially cutaway exploded perspective view showing the present invention piston structure.

4 is a partially enlarged sectional view taken along the line AA ′ of FIG. 3.

5 is a conceptual cross-sectional view showing the operation of the self-sealing compression ring in this paper.

* Explanation of symbols for main parts of the drawings

10: (in this case) piston 11: head

12: ring groove 12a: upper inclined surface

12b: lower slope 13: upper ring

13a: contact slope 13b: slope

13c: vertical surface 13d: oil groove

14: lower ring 14a: contact slope

14b: slope

The present invention relates to a piston structure of a reciprocal engine, and more particularly to a spaced piston having an automatic sealing compression ring.

The piston (1) used in the conventional reciprocating engine is driven by reciprocating inside the cylinder (2) and injecting, exploding, and expelling the fuel air mixture, and a plurality of circumferences of the head (4) to seal the operating chamber (3). To form a compression ring groove (5) of each of the compression ring (6), the oil supply hole (7) and the oil ring groove (8) for lubrication between the inner surface of the cylinder (2) and the piston (1) (Hereinafter, the compression ring 6 and the oil ring 9 are referred to as piston rings, and the right angle grooves are collectively referred to as ring grooves).

However, in the conventional piston ring structure, the expansion coefficient of the piston ring formed of a material such as a bearing metal is larger than the expansion coefficient of the piston 1 in which the ring groove is located. As shown in 2 degrees, there is a clearance (C) to compensate for the difference in expansion coefficient, so through this interval (C) the lubricating oil is sucked in together with the suction, the fuel air mixture gas leaks during compression, and during explosion There is a problem that the explosive leaks and exhaust is not completely made, but the residual is left, the volumetric efficiency is reduced and incomplete combustion as a whole of the prime mover, the fuel consumption is large, the output is reduced, and the emission of pollutants and noise is severe.

In addition, in order to solve this problem, a plurality of piston rings (2 to 3 for gasoline engines and 3 to 6 for diesel engines) must be provided. There was a difficult issue.

The present invention is devised to solve the above-described problems, and will be described in detail based on the accompanying drawings.

The spacingless piston in the present disclosure forms a ring groove 12 having a cross section having a lower inclined surface 12a and 12b inclined downwardly around the head 11 of the piston 10 so as to have a ring groove 12 thereon. An upper ring (upper) having a cross section formed with an inclined surface (13b) corresponding to the upper inclined surface (12a) of the upper surface and a vertical surface (13c) contacting the inner wall of the cylinder (2) at the side and a contact inclined surface (13a) formed at the bottom thereof ring: 13, a cross section in which an inclined surface 14b corresponding to the contact inclined surface 13a of the upper ring 13 and an inclined surface 14b corresponding to the lower inclined surface 12b of the ring groove 12 are formed in the upper portion The lower ring 14 having a ring shape is formed by contacting the inclined surfaces 13a and 14a with each other, and an oil groove 13d that is a supply passage for lubricating oil is provided in the lower portion of the vertical surface 13c of the upper ring 13. ) Is formed, and the upper ring 13 and the lower ring 14 have openings 13c and 14c formed on opposite sides thereof, so that both sides of the ring groove 12 are formed. Such that the non-rotatably by the war not fixed is fixed to the alignment, etc. (15a, 15b) is preferably fixed, respectively.

The inclination angle α of the upper and lower inclined surfaces 12a and 12b of the ring groove 12 and the corresponding inclined surface 13b of the upper ring 13 and the inclined surface 14b of the lower ring 14 is 5 ° to 10 °. Preferably 8 ° and the contact angle β between the contact inclined surface 13a of the upper ring 13 and the contact inclined surface 14a of the lower ring 14 is between 15 ° and 15 °-preferably 18 °. Is formed.

This spaceless piston in this configuration operates as follows.

That is, the upper ring 13 and the lower ring 14 made of elastic materials, such as a right angle bearing metal, have elastic forces Fu and f1 that are to spread outwards during the operation of the piston 10, so that the upper ring 13 The vertical wall 13c comes into contact with the inner wall of the cylinder 2, and the elastic force F1 of the lower ring 14 serving as a wedge serves to fu the upper ring 13 through the contact surfaces 13a and 14a. = (cosα / sin (α + β) × F1 to be delivered to push the inclined surface 13b of the upper ring 13 to the upper inclined surface 12a of the ring groove 12 with fu × cosα to be in close contact with each other. The force of fu x sinα is further applied to the vertical surface 13c of the upper ring 13 to closely contact the inner wall of the cylinder 2 while simultaneously fd = (cosα / sin (α + β) to the lower inclined surface 12b of the ring groove 12. It comes in close contact with the force of) × F1.

In addition, when the upper ring 13 and the lower ring 14 are expanded by heating, the contact surfaces 13a and 14a move relative to each other, and the upper and lower inclined surfaces 13b and 14b are upper and lower inclined surfaces 12a and 12b of the ring groove 12. The oil groove (13d) is supplied to the inner wall of the cylinder (2) by receiving the lubricating oil supplied to the ring groove (12) by the oil supply hole of the appropriate position (not shown) This facilitates a smooth relative movement between the piston 10 and the cylinder (2).

As mentioned above, the gapless piston using the self-sealing compression ring of this paper can be completely sealed without gaps using only one compression ring, so there is no leakage of working gas, which saves fuel, increases output, and releases noise and harmful gas. This is considerably reduced, and the simple shape makes the production and maintenance very easy.

Claims (2)

In the piston moving relative to the cylinder in the reciprocating period, a ring groove 12 having a cross section having upper and lower inclined surfaces 12a and 12b inclined downward is formed around the head 11 of the piston 10, A ring-shaped cross section in which the inclined surface 13b corresponding to the upper inclined surface 12a is formed on the upper side, the vertical surface 13c in contact with the inner wall of the cylinder 2 is formed on the side, and the contact inclined surface 13a is formed on the lower side. An annular cross-section having an upper ring 13 and a contact inclined surface 14a corresponding to the contact inclined surface 13a at the top, and an inclined surface 14b corresponding to the lower inclined surface 12b at the bottom. Spaced piston provided with a self-sealing compression ring, characterized in that the lower ring 14 is accommodated in the ring groove 12 so that the mutual contact inclined surfaces (13a, 14a) contact. The spaceless piston with a seal seal compression ring according to claim 1, characterized in that an oil groove (13d) is formed in the lower portion of the vertical surface (13c) of the upper ring (13).