Inner support elastic body for honing outer circle of piston ring

Abstract

The utility model discloses a piston ring outer circle honing inner supporting elastic body, the inner supporting elastic body is arranged in a piston ring, the piston ring is sleeved outside the inner supporting elastic body and is tightly attached to the inner supporting elastic body, and a plurality of cutting grooves penetrating along the axial direction are arranged on the contact outer wall of the inner supporting elastic body and the inner surface of the piston ring. And the cutting groove of the outer circle is beneficial to rapid flowing of a honing medium, so that the honing efficiency can be further improved, and the maximum honing efficiency can reach 600%. Due to the cutting grooves of the outer circle, the part, making contact with the ring, of the inner supporting elastic body becomes a plurality of independent elastic units, honing pressure can be evenly distributed, and then the outer circle of the ring can obtain even honing pressure.

Description

Technical Field

[0001] The utility model relates to a honing device for a piston ring, in particular to an inner supporting elastic body for honing the outer circle of a piston ring. Background Art

[0002] As is well known in the internal combustion engine and piston ring industry, the piston ring plays the role of sealing gas, controlling oil consumption and conducting heat. When working, the outer cylindrical surface of the piston ring fits tightly with the cylinder and realizes its function. The piston ring industry widely uses honing technology to process the outer cylindrical surface. The so-called honing is to compress the piston ring and put it into a cylindrical cast iron cylinder called a honing sleeve, so that the outer cylindrical surface and the inner cylindrical surface of the honing sleeve fit tightly, and the two are caused to move and wear each other in the axial and circumferential directions on the honing equipment, and finally achieve the required outer cylindrical surface dimensional accuracy. In order to prevent dry friction between the two, a medium called honing fluid will be added during honing. The medium may be machine oil, cutting fluid or other suitable liquids. In order to improve the honing efficiency, hard powders such as white corundum will also be added to the medium.

[0003] like Figure 1 As shown in the figure, for compression rings and integral oil rings, the traditional honing method is to use the elastic force of the piston ring itself to make it fit tightly with the honing sleeve to implement the honing operation. The two-combination oil ring refers to the spiral spring oil ring, which includes an oil ring with a spring groove and a spiral spring. For the two-combination oil ring, since the elastic force of the oil ring body itself is extremely small, a spiral spring is added to it to increase the elastic force and thus improve the honing efficiency. However, the process of installing springs one by one in the oil ring is inefficient. On the other hand, it also increases the difficulty of spring management, including spring production, identification, on-site storage and failure identification. The three-combination oil ring refers to the steel belt combination oil ring, which includes two scrapers and a wave spring. For the three-combination oil ring, the scraper has almost no elastic force, and traditional honing cannot be implemented. The outer circle polishing is often used, but the correction of the outer circle by polishing is not as good as the honing effect. Summary of the invention

[0004] Purpose of the invention: In view of the above problems, the utility model provides an inner support elastic body for honing the outer circle of a piston ring, which improves the honing efficiency.

[0005] Technical solution: To solve the above problems, the utility model adopts an inner support elastomer for honing the outer circle of a piston ring. The inner support elastomer is arranged inside the piston ring. The piston ring is sleeved outside the inner support elastomer and fits tightly with the inner support elastomer. The outer wall in contact with the inner surface of the piston ring is provided with a plurality of grooves penetrating along the axial direction.

[0006] Furthermore, the grooves are evenly distributed around the outer surface of the inner support elastic body.

[0007] Furthermore, the material of the inner supporting elastic body is nitrile rubber.

[0008] Furthermore, the cross section of the groove is rectangular.

[0009] Furthermore, a honing sleeve is sleeved on the outer side of the piston ring, and the inner support elastomer is sleeved on the outer side of the honing rod. The upper and lower ends of the honing rod are respectively provided with an upper pressure plate and a lower pressure plate. The upper pressure plate is fixed to the upper end of the honing rod by a locking nut, and the lower pressure plate is fixed to the lower end of the honing rod. The piston ring is restricted between the upper pressure plate and the lower pressure plate.

[0010] Furthermore, a sleeve is arranged between the inner supporting elastic body and the honing rod.

[0011] Furthermore, the upper pressing plate and the lower pressing plate are flat pressing plates or inclined pressing plates.

[0012] Furthermore, the inner diameter of the honing sleeve ranges from 40 to 300 mm, and the width of the groove is 3.5±1 mm.

[0013] Beneficial effects: Compared with the prior art, the utility model has the advantage that the outer circumferential groove is conducive to the rapid flow of the honing medium, which is conducive to further improving the honing efficiency, up to 600%. The outer circumferential groove makes the part where the inner support elastic body contacts the ring become a number of independent elastic units, which is conducive to the uniform distribution of the honing pressure, and then the outer circle of the ring obtains a uniform honing pressure. It can directly hone the cylindrical surface of various types of piston rings, such as the oil scraping belt of the oil ring (including the integral oil ring, the two-combination oil ring, and the three-combination oil ring), the contact belt of the conical surface ring, and the contact belt of the barrel surface ring. The barrel surface can also be honed by replacing the flat pressure plate with an inclined pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an existing piston ring honing cylinder;

[0015] Figure 2 It is a structural schematic diagram of the piston ring honing cylinder of the utility model;

[0016] Figure 3 It is a schematic cross-sectional view of the inner supporting elastic body in the utility model;

[0017] Figure 4 It is a longitudinal section schematic diagram of the inner supporting elastic body in the utility model;

[0018] Figure 5 (a) is a schematic diagram of a flat plate. Figure 5 (b) is a schematic diagram of the oblique pressure plate. DETAILED DESCRIPTION

[0019] Depend on Figure 2As shown, in this embodiment, a piston ring outer circle honing inner support elastic body is installed on the inner circle surface of the piston ring 2, so as to improve the friction between the piston ring 2 and the honing sleeve 3, thereby improving the honing efficiency. The inner support elastic body 1 is tightly fitted with the piston ring 2. The inner support elastic body 1 is an inner support rubber sleeve made of nitrile rubber with a Shore hardness of HA55-80. Figure 3 and Figure 4 As shown, the outer wall of the inner support elastic body 1 contacting the inner surface of the piston ring 2 is provided with a plurality of axially penetrating grooves 11, the width of the grooves is 3.5±1mm, and the grooves are evenly distributed in the circumferential direction. The size of the inner support elastic body 1 is based on the size of the ring-mounting part of the existing honing equipment, and the applicable cylinder diameter range is: 40~300mm.

[0020] The outer side of the piston ring 2 is sleeved with a honing sleeve 3, and the upper and lower ends of the honing rod 4 are respectively provided with an upper pressure plate 5 and a lower pressure plate 6, and a sleeve 8 is mounted on the honing rod 4 and is located between the upper pressure plate 5 and the lower pressure plate 6. The upper pressure plate 5 is fixed to the upper end of the honing rod 4 by a locking nut 7, and the lower pressure plate 6 is fixed to the lower end of the honing rod 4; the piston ring 2 to be honed is limited between the upper pressure plate 5 and the lower pressure plate 6. The piston ring 2 is mounted on the inner support elastic body 1, and the outer diameter of the piston ring 2 on the inner support elastic body 1 is larger than the inner diameter of the honing sleeve 3. After the inner support elastic body 1 and the piston ring 2 on the outer side thereof are pressed into the honing sleeve 3, the piston ring 2 is tightly attached to the inner wall of the honing sleeve 3, which greatly increases the fitting force between the piston ring 2 and the honing sleeve 3.

[0021] A sleeve 8 is sleeved between the inner supporting elastic body 1 and the honing rod 4 .

[0022] During the specific operation, firstly, the inner support elastic body 1 is selected according to the cylinder diameter and radial thickness of the piston ring 2 to be honed.

[0023] When in use, first install the lower pressure plate 6 on the honing rod, then install the sleeve 8 on the honing rod 4, install the piston ring 2 on the inner support elastic body 1, then install the elastic body with the piston ring 2 on the sleeve 8, then install the pressure plate 5, and lock it with the locking nut 7, and then press the whole into the honing cylinder sleeve 3. Then add honing fluid to the outer cylindrical surface of the piston ring 2 for honing, which improves the honing efficiency, up to 600%. Figure 5 As shown, the barrel surface can also be honed by replacing the flat pressure plate with an inclined pressure plate.

Claims

1. A piston ring outer circle honing inner support elastic body, characterized in that: The inner support elastic body (1) is arranged inside the piston ring (2), and the piston ring (2) is sleeved outside the inner support elastic body (1) and is tightly fitted with the inner support elastic body (1). The contact outer wall between the inner support elastic body (1) and the inner surface of the piston ring (2) is provided with a plurality of axially penetrating grooves (11).

2. The piston ring outer circle honing inner support elastic body according to claim 1, characterized in that: The cut grooves (11) are evenly distributed around the outer surface of the inner support elastic body (1).

3. The piston ring outer circle honing inner support elastic body according to claim 2, characterized in that: The material of the inner supporting elastic body (1) is nitrile rubber.

4. The piston ring outer circle honing inner support elastic body according to claim 3, characterized in that: The cross section of the cutting groove (11) is rectangular.

5. The piston ring outer circle honing inner support elastic body according to claim 4, characterized in that: A honing sleeve (3) is sleeved on the outer side of the piston ring (2), and an inner support elastic body (1) is sleeved on the outer side of a honing rod (4). An upper pressure plate (5) and a lower pressure plate (6) are respectively provided on the upper and lower ends of the honing rod (4). The upper pressure plate (5) is fixed to the upper end of the honing rod (4) through a locking nut (7), and the lower pressure plate (6) is fixed to the lower end of the honing rod (4). The piston ring (2) is restricted between the upper pressure plate (5) and the lower pressure plate (6).

6. The piston ring outer circle honing inner support elastic body according to claim 5, characterized in that: A sleeve (8) is arranged between the inner supporting elastic body (1) and the honing rod (4).

7. The piston ring outer circle honing inner support elastic body according to claim 5, characterized in that: The upper pressing plate (5) and the lower pressing plate (6) are flat pressing plates or inclined pressing plates.

8. The piston ring outer circle honing inner support elastic body according to claim 5, characterized in that: The inner diameter of the honing sleeve (3) ranges from 40 to 300 mm, and the width of the cut groove is 3.5±1 mm.

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