Asymmetric tread piston ring

Abstract

The utility model provides a piston ring with an asymmetric tread. The piston ring comprises a piston, a ring groove, a piston ring body, a fillet and an opening. An annular groove is formed in the outer wall of the piston; the piston ring is connected to the inner wall of the annular groove in a sleeving mode, and a fillet is formed in the outer side of the piston ring. An opening is formed in one end of the piston ring; through improvement on the piston ring with the asymmetric tread, the piston ring has the advantages of being reasonable in structural design, capable of reducing abrasion and good in sealing barrier property, and therefore the problems and defects in an existing device are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rings, and more specifically, particularly relates to an asymmetric stepped piston ring. Background Art

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

[0003] When the piston moves up and down in the cylinder, the surface of the piston ring in contact with the piston groove is small, which is easy to cause wear and reduce the service life of the piston ring. Moreover, when the piston ring abuts against the cylinder wall and rubs up and down back and forth, the outer wall edge of the piston ring is easy to cause wear to the inner wall of the cylinder, reducing the function of the piston ring.

[0004] In view of this, research and improvement are carried out on the existing problems, and an asymmetric stepped piston ring is provided, aiming to solve the problems and improve the practical value through this technology. Content of the Utility Model

[0005] The purpose of the utility model is to provide an asymmetric stepped piston ring to solve the problems and deficiencies mentioned in the above background art.

[0006] To achieve the above purpose, the utility model provides an asymmetric stepped piston ring, which is achieved by the following specific technical means:

[0007] An asymmetric stepped piston ring includes: a piston, a ring groove, a piston ring, a fillet, and an opening; a ring groove is provided on the outer wall of the piston; the piston ring is sleeved and connected to the inner wall of the ring groove, and a fillet is provided on the outer side of the piston ring; an opening is provided at one end of the piston ring. The piston ring is a ring-shaped structure with a trapezoidal cross-section. The ring groove is a trapezoidal circular groove for accommodating the piston ring, and the piston ring is sleeved and connected to the inner wall of the ring groove. The fillet is provided at the edges of the upper and lower ends of the outer wall of the piston ring. The cross-sectional surfaces at both ends of the opening are parallel inclined surfaces.

[0008] As a further optimization of this technical solution, a layer of NI-CR alloy layer film 202 is sprayed on the surface of the piston ring 2; a layer of phosphating film 203 is sprayed on the surface of the NI-CR alloy layer film 202; a layer of boron nitride 204 is sprayed on the surface of the phosphating film 203.

[0009] As a further optimization of this technical solution, the surface roughness of the boron nitride 204 is greater than the 10-point average roughness.

[0010] As a further optimization of this technical solution, a layer of lubricating oil is applied to the surface of the boron nitride 204.

[0011] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0012] 1. The piston ring of the present utility model is a ring-shaped structure with a trapezoidal cross-section; the ring groove is a trapezoidal circular groove for accommodating the piston ring, and the piston ring is sleeved and connected to the inner wall of the ring groove. When the piston moves up and down in the cylinder block, the outer wall of the piston ring adheres to the inner wall of the ring groove, increasing the contact area between the piston ring and the ring groove and playing a better blocking role.

[0013] 2. The rounded corners of the present utility model are arranged at the edges of the upper and lower ends of the outer wall of the piston ring, which prevents the sharp edges from scratching the inner wall of the cylinder block during the movement of the piston and reduces wear.

[0014] 3. The cross-sections at both ends of the opening of the present utility model are parallel inclined planes, so that when the piston ring is in the cylinder block, the gap is an inclined plane, increasing the contact area and playing a better sealing role.

[0015] 4. Through the improvement of an asymmetric trapezoidal piston ring, the present utility model has the advantages of reasonable structural design, reduced wear, and good sealing and blocking performance, thus effectively solving the problems and deficiencies in the existing devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a partial structural diagram of the present utility model;

[0019] Figure 3 is a partial sectional structural diagram of the present utility model;

[0020] Figure 4 is a partial sectional structural diagram of the present utility model.

[0021] In the figure: piston 1, ring groove 101, piston ring 2, rounded corner 201, NI-CR alloy layer film 202, phosphating film 203, boron nitride 204, opening 3. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] Meanwhile, in the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] An asymmetric stepped piston ring, comprising: a piston 1, a ring groove 101, a piston ring 2, a fillet 201, and an opening 3; a ring groove 101 is formed on the outer wall of the piston 1; the piston ring 2 is sleeved and connected to the inner wall of the ring groove 101, and a fillet 201 is formed on the outer side of the piston ring 2; the piston ring 2 is a ring-shaped structure with a trapezoidal cross-section; the ring groove 101 is a trapezoidal circular groove for accommodating the piston ring 2, and the piston ring 2 is sleeved and connected to the inner wall of the ring groove 101. When the piston moves up and down in the cylinder block, the outer wall of the piston ring 2 abuts against the inner wall of the ring groove 101, increasing the contact area between the piston ring 2 and the ring groove 101 and playing a better blocking role; the fillet 201 is formed at the edges of the upper and lower ends of the outer wall of the piston ring 2, preventing the sharp edges from scratching the inner wall of the cylinder block during the movement of the piston and reducing wear.

[0025] An opening 3 is formed at one end of the piston ring 2; the cross-sections at both ends of the opening 3 are parallel inclined planes, so that when the piston ring 2 is in the cylinder block, the gap is an inclined plane, increasing the contact area and playing a better sealing role.

[0026] A layer of NI-CR alloy layer film 202 is sprayed on the surface of the piston ring 2; a layer of phosphating film 203 is sprayed on the surface of the NI-CR alloy layer film 202; a layer of boron nitride 204 is sprayed on the surface of the phosphating film 203. The surface roughness of the boron nitride 204 is greater than the 10-point average roughness. A layer of lubricating oil is smeared on the surface of the boron nitride 204. The setting of the NI-CR alloy layer film 202 effectively increases the surface strength of the piston ring 2. The setting of the phosphating film 203 effectively increases the surface wear resistance of the piston ring 2. The setting of the boron nitride 204 effectively increases the surface wear resistance of the piston ring 2. The surface roughness of the boron nitride 204 being greater than the 10-point average roughness can make the surface of the boron nitride 204 have certain pits, which can better store lubricating oil.

[0027] Specific implementation steps: Fit the piston ring 2 into the ring groove 101 of the piston 1, place it into the cylinder block. The outer wall of the piston ring 2 abuts against the inner wall of the cylinder block, and the opening 3 is closed. When the piston 1 slides up and down, the upper and lower outer walls of the piston ring 2 fit against the inner wall of the ring groove 101 to isolate the gas in the cylinder.

[0028] In summary: For this asymmetric trapezoidal piston ring, the piston ring has an annular structure with a trapezoidal cross-section; the ring groove is a trapezoidal circular groove for accommodating the piston ring, and the piston ring is sleeved and connected to the inner wall of the ring groove. When the piston moves up and down in the cylinder block, the outer wall of the piston ring adheres to the inner wall of the ring groove, increasing the contact area between the piston ring and the ring groove and achieving a better blocking effect; the rounded corners are provided at the edges of the upper and lower ends of the outer wall of the piston ring, preventing the sharp edges from scratching the inner wall of the cylinder block during the movement of the piston and reducing wear; the cross-sections at both ends of the opening are parallel inclined planes, so that when the piston ring is in the cylinder block, the gap is an inclined plane, increasing the contact surface area and achieving a better sealing effect; through the improvement of an asymmetric trapezoidal piston ring, it has the advantages of reasonable structural design, reduced wear, and good sealing and blocking performance, thus effectively solving the problems and deficiencies in the existing device.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An asymmetric stepped piston ring, characterized in that: The piston ring (2) is an annular structure with a trapezoidal cross-section; the piston ring (2) is sleeved and connected to the inner wall of the ring groove (101) of the piston (1), and a rounded corner (201) is provided on the outer side of the piston ring (2); the rounded corner (201) is provided at the edges of the upper and lower ends of the outer wall of the piston ring (2); a ring groove (101) is provided on the outer wall of the piston (1); the ring groove (101) is a trapezoidal circular groove for accommodating the piston ring (2), and the piston ring (2) is sleeved and connected to the inner wall of the ring groove (101); one end of the piston ring (2) is provided with an opening (3); the cross-sections at both ends of the opening (3) are parallel inclined planes. A layer of NI-CR alloy layer film (202) is sprayed on the surface of the piston ring (2); a layer of phosphating film (203) is sprayed on the surface of the NI-CR alloy layer film (202); a layer of boron nitride (204) is sprayed on the surface of the phosphating film (203).

2. The asymmetric stepped piston ring according to claim 1, wherein: The surface roughness of the boron nitride (204) is greater than the 10-point average roughness.

3. The asymmetric stepped piston ring according to claim 1, characterized in that: A layer of lubricating oil is applied to the surface of the boron nitride (204).

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