Combined sealing piston ring

Abstract

The utility model relates to the technical field of piston rings, in particular to a combined type sealing piston ring which comprises an outer ring body and an inner ring body, an outer ring body opening is formed in the outer ring body, an annular groove is formed in the top face of the outer ring body, an inner ring body opening is formed in the inner ring body, the inner ring body is arranged in the annular groove in an embedded mode, and the outer ring body opening is communicated with the inner ring body opening. A blocking piece is arranged on the side, away from the opening of the inner ring body, of the inner ring body, the blocking piece is matched with the opening of the outer ring body, and an exhaust groove communicated with the annular groove is formed in the top face of the outer ring body. According to the utility model, the problems of increased air leakage, reduced compression force, insufficient combustion and even incapability of starting caused by abrasion of a single-ring piston ring are solved to the greatest extent; the problems that when two piston rings are used side by side, part of engine oil scraped off from a cylinder sleeve is retained in a gap between the two piston rings, the engine oil enters a combustion chamber after being gasified, and too much engine oil is consumed are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rings, in particular to a combined sealing piston ring. Background Art

[0002] The piston ring is a metal ring used to be embedded in the piston groove. There are two types of piston rings: compression rings and oil rings. The compression ring can be used to seal the combustible mixture in the combustion chamber; the oil ring is used to scrape off the excess oil on the cylinder. The piston ring is a metal elastic ring with a large outward expansion deformation. It is assembled into the cross-section and the corresponding annular groove. The reciprocating and rotating piston ring forms a seal between the outer surface of the ring and the cylinder and between the ring and one side of the ring groove by relying on the pressure difference of the gas or liquid.

[0003] Existing piston rings are generally single rings, which inevitably have the characteristics of too large a gap at the opening and the opening gradually expanding with use. Especially under harsh environmental conditions, the piston ring is very easy to wear, which will cause increased leakage, reduced compression force, incomplete combustion, and even failure to start.

[0004] At present, two piston rings are usually used in parallel to solve this problem. However, since both piston rings are in contact with the cylinder liner, part of the oil scraped from the cylinder liner will be retained in the gap between the two piston rings, and the oil will enter the combustion chamber after being vaporized, causing excessive oil consumption. Utility Model Content

[0005] The purpose of the utility model is to provide a combined sealing piston ring.

[0006] A combined sealing piston ring comprises an outer ring body and an inner ring body, wherein the outer ring body is provided with an outer ring body opening, the top surface of the outer ring body is provided with an annular groove, the inner ring body is provided with an inner ring body opening, the inner ring body is embedded in the annular groove, a sealing piece is provided on the side of the inner ring body away from the inner ring body opening, the sealing piece cooperates with the outer ring body opening, and the top surface of the outer ring body is provided with an exhaust groove connected with the annular groove.

[0007] In summary, the utility model has the following beneficial effects:

[0008] The utility model delays to the greatest extent the problems of increased air leakage, reduced compression force, insufficient combustion and even failure to start caused by wear of a single-ring piston ring; and solves the problem that when two piston rings are used in parallel, part of the engine oil scraped from the cylinder sleeve will be retained in the gap between the two piston rings, and the engine oil will enter the combustion chamber after being vaporized, causing excessive engine oil consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0010] Figure 1 It is a three-dimensional structural schematic diagram of a combined sealing piston ring of the utility model;

[0011] Figure 2 This is a front view of a combined sealing piston ring of the utility model;

[0012] Figure 3 It is a schematic diagram of the three-dimensional structure of the outer ring body of the utility model;

[0013] Figure 4 This is a front view of the outer ring body of the utility model;

[0014] Figure 5 It is a schematic diagram of the three-dimensional structure of the inner ring body of the utility model;

[0015] Figure 6 It is the front view of the inner ring body of the utility model.

[0016] In the figure: 1 outer ring body, 2 outer ring body opening, 3 annular groove, 4 exhaust groove, 5 inner ring body, 6 inner ring body opening, 7 sealing piece. Implementation

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The following is combined with Figure 1-6 The utility model is further described as follows:

[0019] A combined sealing piston ring comprises an outer ring body 1 and an inner ring body 5, wherein the outer ring body 1 is provided with an outer ring body opening 2, the top surface of the outer ring body 1 is provided with an annular groove 3, the inner ring body 5 is provided with an inner ring body opening 6, the inner ring body 5 is embedded in the annular groove 3, a sealing piece 7 is provided on the side of the inner ring body 5 away from the inner ring body opening 6, the sealing piece 7 cooperates with the outer ring body opening 2, and the top surface of the outer ring body 1 is provided with an exhaust groove 4 connected with the annular groove 3.

[0020] In this embodiment, an annular groove 3 is provided on the top surface of the outer ring body 1, and the inner ring body 5 is embedded in the annular groove 3, and the outer ring body 1 and the inner ring body 5 form a combined sealing piston ring. After the inner ring body 5 is embedded in the annular groove 3, the blocking piece 7 is located at the opening 2 of the outer ring body. When the combined sealing piston ring of the utility model is installed in the cylinder sleeve of the cylinder, the gap of the opening 2 of the outer ring body will be squeezed and reduced to a size smaller than the length of the blocking piece 7. After installation, the gaps between the two ends of the outer ring body 1 and the two ends of the blocking piece 7 are set. Although the opening 2 of the outer ring body will gradually become larger as the outer ring body 1 is continuously worn, the blocking piece 7 can still be effectively blocked. In this embodiment, preferably, the length of the blocking piece 7 is 3.6 mm, and when the outer ring body 1 is just installed in the cylinder sleeve of the cylinder, the gap of the opening 2 of the outer ring body is 0.4 mm.

[0021] After being blocked by the blocking piece 7, the airflow flows to the gap between the inner wall of the outer ring body 1 and the piston, and then is discharged from the exhaust groove 4. In this embodiment, preferably, the exhaust groove 4 has a depth of 0.5 mm and a width of 0.3 mm. Since the exhaust groove 4 is not a disconnected opening, when the outer ring body 1 is worn, the depth and width of the exhaust groove 4 will not increase, and will not cause problems such as increased leakage, reduced compression force, incomplete combustion, or even failure to start.

[0022] When the combined sealing piston ring of the utility model is working, only the outer ring body 1 contacts the cylinder liner of the cylinder, and part of the engine oil scraped from the cylinder liner will not be retained in the gap between the two piston rings. The engine oil will enter the combustion chamber after being vaporized, causing the problem of excessive engine oil consumption.

[0023] In summary, the present invention is not limited to the above specific embodiments. Those skilled in the art may make several changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the claims of the present invention.

[0024] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0025] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

Claims

1. A combined sealing piston ring, characterized in that: The invention comprises an outer ring body (1) and an inner ring body (5), wherein the outer ring body (1) is provided with an outer ring body opening (2), the top surface of the outer ring body (1) is provided with an annular groove (3), the inner ring body (5) is provided with an inner ring body opening (6), the inner ring body (5) is embedded in the annular groove (3), a sealing piece (7) is provided on a side of the inner ring body (5) away from the inner ring body opening (6), the sealing piece (7) cooperates with the outer ring body opening (2), and the top surface of the outer ring body (1) is provided with an exhaust groove (4) which is connected with the annular groove (3).

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