RU10812U1 - COMPRESSION PISTON RING - Google Patents

Abstract

A compression split piston ring containing a stepped lock in the form of radial or axial shelves overlapping one another with an overlap and having thermal gaps at the ends, characterized in that the walls of the shelves are made flat and their contact plane has an inclination angle of no more than 3, respectively, to the radial or axial plane of the ring .

Description

COMPRESSION RING

The technical solution relates to the sealing technique and can be used to seal pistons that perform reciprocating movements, for example, in internal combustion engines, compressors, and pumps.

A split piston compression ring / cm is known. author testimonial. No. 31199 according to class NKI 47f, I9 © publ. 07/31/1933 /, in which the connecting shelves of the castle are made: one concave grooved, the other convex, tightly adjacent to the first on the entire surface of the contact, which excludes the possibility of penetration of gases through the castle.

However, the implementation of such surfaces is very laborious and they have not found wide application.

A compression piston ring is also known, the lock joints of which are made with a thermal clearance and have a slope of 45 ° / cm. Prince V.VDrinkin Improving the working capacity of the piston group of a diesel engine DYuO, 1Lashgiz, M., 1959, p. 10,.

However, such a constructive solution does not provide high reliability, since when the compression ring operates in adverse conditions: high specific pressures, speeds and temperatures, it undergoes intensive wear and the size of the lock in the working position can increase by more than I mm, which leads to gas breakthrough

MKI R 16 7 9/00, 9 / 12.9 / 14

Closest to the claimed technical solution is the well-known split ring seal with gapless fit of joints due to the execution of the lock step / cm. avt.svvd. y2 I5II50I according to U1, MKI R 16 J 9/12, publ., September 30, 89 Gobsl. A 36 /. In this case, the ends of the joints are overlapped, on top of each other with shelves equal to half the height of the ring, and fixed from displacement by protrusions and grooves made on the shelves,

However, such a design of the compression ring does not provide it with sufficient mobility in the piston stream, which can lead to its burning from oil coking at high temperatures and jamming. Moreover, the ring, losing the possibility of springing against the cylinder wall, makes it possible for the gas to break through, the gap between the piston and the cylinder wall, and ultimately the engine loses power and requires a stop to clean and replace the piston rings. In addition, such a compression ring is complex in design and not technologically advanced in production.

The task was to develop a split piston compression ring that would ensure high reliability in operation, preventing gas breakthroughs through the lock, eliminate the negative effect of increasing the clearance in the lock during operation, and would also have a simple design and would be technologically advanced to manufacture.

This problem is solved by the fact that the walls of the shelves are made flat, while the plane of their contact has an inclination angle of not 6oj | ee 3 °, respectively, to the horizontal or vertical axis of the piston.

The essence of the claimed technical solution is illustrated by the drawing, which shows:

figure 1 - compression ring of the piston, side view;

 - view A of FIG. 6 is a section bb in FIG. 5.

The piston compression ring paspesDioe I contains a step lock at its ends to ensure a tight joint. It consists of shelves 2 and 3, which are flat, and the plane of their contact 4 is inclined to the vertical axis of the ring at an angle of no more than 3 °. In another embodiment of a step lock), shelves 5 and 6 are also made by Eeyokimi, w © the plane of their contact is located in the radial plane of the ring and has an angle of inclination to this plane of no more than 3 °, the dimensions of the shelves 2 and 3 are usually equal to half the thickness of the ring I, and shelves 5 and 6 - half the width of the ring I.

When working in a cylinder liner, a compression split ring I seals the gap between the piston walls and the cylinder liner. It is installed in the piston groove so that shelves 2 and 3 (or 5 and 6) overlap one another in an overlap. At the same time, the ring retains the freedom of thermal expansion due to circumferential gaps 8 and 9 (or 10 and II), guaranteed by calculation over the entire range of operating temperatures. At the same time, due to the high specific contact pressures of the shelves 2 and 3 (or 5 and 6), the rings are tightly pressed together on the contact surfaces 4 bushes 7 The execution of the contact plane of the shelves with an angle of inclination of up to 3 ° ensures that when the ring expands, when the diameter of the ring increases, the inclined surfaces act like a wedge, sealing the joint at the junction of the ends of the split compression ring. This ensures its solidity and does not allow gas to penetrate through such a seal.

The proposed design of the compression split ring of the piston increases compression in the working chamber of the engine, compressor or pump, especially at low temperatures, which improves the starting properties of the units, increases the life of the ring due to the absence of the effect of increasing the clearance in the lock during operation, is simple

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and manufacturability, as well as ease of maintenance. Thus, the proposed technical solution has a new visa in comparison with the prototype and has industrial applicability, that is, it meets the patentability conditions of the utility model.

Applicant author: / - /. V. Mack with him about in

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Claims (1)

A compression split piston ring containing a step lock in the form of radial or axial shelves overlapping one another with an overlap and having thermal gaps at the ends, characterized in that the walls of the shelves are made flat and their contact plane has an inclination angle of not more than 3 ^o respectively to the radial or axial plane of the ring.