CN213808823U - Self-sealing double-opening split type piston ring - Google Patents

Abstract

The utility model discloses a split type piston ring of two openings of self sealss solves easy fracture and the too big not enough technical problem of deflection in the current piston ring installation. The utility model discloses a first piston hemicycle and second piston hemicycle, first piston hemicycle and second piston hemicycle end to end constitute the piston ring to first piston hemicycle and second piston hemicycle end to end department closely laminates. The utility model has the advantages of simple structure and scientific and reasonable design, convenient to use has avoided the damage and the deformation in the current piston ring installation, is convenient for install and dismantles work.

Description

Self-sealing double-opening split type piston ring

Technical Field

The utility model belongs to the technical field of the piston ring, concretely relates to two split type piston rings that open of self sealss.

Background

At present, the compound compressor is widely applied to departments of national defense, machinery, metallurgy, chemical industry and the like, a piston ring is the most critical part in the compound compressor, in the high-pressure reciprocating compressor, the size of a high-pressure-level piston ring is smaller, but in order to ensure the structural strength, the processing scheme adopted is to increase the section size of the piston ring and use a piston ring material with higher strength.

The piston ring structure in the existing reciprocating compressor is an annular structure, and needs to be expanded when being installed in a piston ring groove, so that the inner diameter of the piston ring is larger than the outer diameter of the piston. In the installation process, the piston ring made of high-strength material is easy to break, and even if the piston ring is smoothly installed in the piston ring groove, the piston ring is greatly deformed in the installation process, so that the mechanical property and the service life of the piston ring are influenced.

Therefore, design a split type piston ring of two openings of self sealss, easy fracture and the too big technical problem of deflection are solved in the current piston ring installation, are convenient for install and dismantle work.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a split type piston ring of two openings of self sealss, easy fracture and the too big technical problem of deflection in the solution current piston ring installation.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a split type piston ring of two openings of self sealss, includes first piston hemicycle body and second piston hemicycle body, and first piston hemicycle body and second piston hemicycle body end to end constitute the piston ring to first piston hemicycle body and second piston hemicycle body end to end department of meeting closely laminates.

Furthermore, the end-to-end connection part of the first piston semi-ring body and the second piston semi-ring body is a bevel cut.

Furthermore, the two inclined notches on the piston ring are centrosymmetrically distributed by taking the circle center of the piston ring as a symmetric point.

Furthermore, the piston is provided with at least one piston ring groove matched with the piston ring, and a piston ring is embedded in each piston ring groove.

Further, the difference of the inner diameter and the outer diameter of the piston ring is larger than the clearance between the outer wall of the piston and the inner wall of the cylinder.

Further, the difference of the inner diameter and the outer diameter of the piston ring is smaller than the distance between the inner bottom surface of the piston ring groove and the inner wall of the cylinder.

Furthermore, the thickness of the piston ring is smaller than the width of the piston ring groove, and the piston ring is embedded in the piston ring groove to leave a gap.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model has the advantages of simple structure and scientific and reasonable design, convenient to use has avoided easy fracture and the too big technical problem of deflection in the current piston ring installation, is convenient for install and dismantles work.

The utility model discloses a first piston hemicycle and second piston hemicycle, first piston hemicycle and second piston hemicycle end to end constitute the piston ring to first piston hemicycle and second piston hemicycle end to end department closely laminates, and the quantity of piston ring can be one, also can be a plurality ofly. The first piston half-ring body and the second piston half-ring body are connected end to form inclined notches, the two inclined notches are distributed in a centrosymmetric mode by taking the circle center of a piston ring as a symmetric point, the piston ring can be easily embedded into a piston ring groove by the two inclined notches, the difference of the inner diameter and the outer diameter of the piston ring is larger than the depth of the piston ring groove, the piston ring protrudes out of the surface of the piston, and when the piston moves, the protruding part can prevent air flow from passing through, so that the air flow speed difference is generated, and pressure is formed to push the piston ring to the inner wall of a cylinder; meanwhile, the thickness of the piston ring is smaller than the width of the piston ring groove, the piston ring is embedded in the piston ring groove to leave a gap, when the piston moves, the pressure in the cylinder is led into the back of the piston ring from the gap between the piston and the piston ring groove, and the piston ring is pressed on the inner wall of the cylinder by the formed pressure, so that the self-sealing effect of the piston ring is enhanced.

Drawings

Fig. 1 is a top view of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a schematic view of piston ring installation.

Fig. 4 is a schematic view of the installation state of the present invention.

Fig. 5 is a schematic view of the working state of the present invention.

Wherein, the names corresponding to the reference numbers are: 1-a first piston half ring body, 2-a second piston half ring body, 3-a piston ring, 4-an oblique notch, 5-a cylinder, 6-a piston, 7-a piston ring groove, D1-a piston ring inner diameter, D2-a piston outer diameter, D3-a piston ring inner diameter difference, D4-a piston ring thickness, D-a piston ring outer diameter, t 1-a clearance between a piston outer wall and a cylinder inner wall, t 2-a clearance between a piston ring and a cylinder, t 3-a clearance between a piston and a piston ring groove, and t 4-a distance between a piston ring groove inner bottom surface and a cylinder inner wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; of course, mechanical connection and electrical connection are also possible; alternatively, they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in figures 1-5, the utility model provides a pair of split type piston ring of two openings of self sealss, simple structure, design scientific and reasonable, convenient to use have avoided easy fracture and the too big problem of deflection in the current piston ring installation, are convenient for install and dismantle work. The utility model discloses a first piston hemicycle 1 and second piston hemicycle 2, piston ring 3 is constituteed to first piston hemicycle 1 and 2 end to end of second piston hemicycle to first piston hemicycle 1 and 2 end to end department of second piston hemicycle closely laminate.

Piston ring 3 for dividing the body structure, the first piston hemicycle 1 of constitution and 2 end to end departments of second piston hemicycle are scarf 4, two scarf 4 use the 3 centre of a circle of piston ring as symmetrical point central symmetry distribution. The utility model discloses a components of a whole that can function independently structure can be easily with piston ring 3 inlay dress in piston ring groove 7, for traditional integral piston ring, the installation is dismantled very conveniently and has avoided the problem of deformation in integral piston ring fracture or the installation.

Piston ring 3's quantity can be one, also can be a plurality of, set up at least one on the piston 6 with the piston ring groove 7 of piston ring 3 looks adaptation, every piston ring groove 7 embedded is equipped with a piston ring 3.

As shown in fig. 4 and 5, in the piston ring 3 of the present invention, the difference d3 between the inner diameter and the outer diameter of the piston ring is greater than the depth of the piston ring groove 7, and the piston ring 3 is embedded in the piston ring groove 7, so that the piston ring 3 protrudes from the surface of the piston 6; the thickness d4 of the piston ring is smaller than the width of the piston ring groove 7, the piston ring 3 is embedded in the piston ring groove 7, and a gap t3 between the piston ring 3 and the piston ring groove exists; the difference d3 between the inner and outer diameters of the piston ring is greater than the clearance t1 between the outer wall of the piston and the inner wall of the cylinder, and is smaller than the distance t4 between the inner bottom surface of the piston ring groove and the inner wall of the cylinder, and the bottom arrow indicates the movement direction of the piston.

As shown in fig. 4, after the piston ring 3 is installed in the piston ring groove 7, the gap t1 between the outer wall of the piston and the inner wall of the cylinder is larger than the gap t2 between the piston ring and the inner wall of the cylinder, and during the movement of the piston 4, since the volume of the cylinder 3 is not changed, the flow rate at t2 is larger than that at t1, and the flow rate and the pressure are in inverse proportion, a pressure is formed to push the piston ring 3 to the inner wall of the cylinder 5, so that the initial sealing pressure is realized.

As shown in FIG. 5, when the piston moves to the left, when piston ring 3 moved to the inner wall of cylinder 5, the part of piston ring 3 protruding piston 6 surface had blockked the flow of partial gas, and the pressure of cylinder 5 inside led into the piston ring 3 back from piston and piston ring groove's clearance t3, formed the cavity between piston ring 3 and the piston ring groove 7, formed a pressure this moment and pressed piston ring 3 at the inner wall of cylinder 5, strengthened the sealing effect of piston ring 3, reached the utility model discloses self sealedly acts on.

Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solution of the present invention, but not to limit the same, and certainly not to limit the scope of the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems solved by the present invention are still consistent with the present invention, and all the modifications or colors made in the spirit and the idea of the main design of the present invention are included in the protection scope of the present invention; in addition, will the technical scheme of the utility model direct or indirect application is in other relevant technical field, all including on the same reason the utility model discloses an in the patent protection scope.

Claims (8)

1. The utility model provides a split type piston ring of two openings of self sealss which characterized in that: the piston ring comprises a first piston semi-ring body (1) and a second piston semi-ring body (2), wherein the first piston semi-ring body (1) and the second piston semi-ring body (2) are connected end to form a piston ring (3), and the first piston semi-ring body (1) and the second piston semi-ring body (2) are tightly attached to the end to end.

2. The self-sealing double-opening split piston ring as claimed in claim 1, wherein: the end-to-end connection part of the first piston semi-ring body (1) and the second piston semi-ring body (2) is an inclined notch (4).

3. The self-sealing double-opening split piston ring as claimed in claim 2, wherein: two inclined notches (4) on the piston ring (3) are centrosymmetrically distributed by taking the circle center of the piston ring (3) as a symmetrical point.

4. The self-sealing double-opening split piston ring as claimed in claim 1, wherein: the piston (6) is provided with at least one piston ring groove (7) matched with the piston ring (3), and each piston ring groove (7) is internally embedded with one piston ring (3).

5. The self-sealing double-opening split piston ring as claimed in claim 4, wherein: the difference (d3) between the inner diameter and the outer diameter of the piston ring is larger than the clearance (t1) between the outer wall of the piston and the inner wall of the cylinder.

6. The self-sealing double-opening split piston ring as claimed in claim 4, wherein: the difference (d3) between the inner and outer diameters of the piston ring is smaller than the distance (t4) between the inner bottom surface of the piston ring groove and the inner wall of the cylinder.

7. The self-sealing double-opening split piston ring as claimed in claim 4, wherein: the difference (d3) between the inner diameter and the outer diameter of the piston ring is larger than the depth of the piston ring groove (7).

8. The self-sealing double-opening split piston ring as claimed in claim 4, wherein: the thickness (d4) of the piston ring is smaller than the width of the piston ring groove (7), and the piston ring (3) is embedded in the piston ring groove (7) to leave a gap.

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