CN212642896U

CN212642896U - Piston ring with excircle groove

Info

Publication number: CN212642896U
Application number: CN202020606308.1U
Authority: CN
Inventors: 张长春; 史玉平; 刘贝贝
Original assignee: Nanjing Feiyan Piston Ring Co ltd
Current assignee: Nanjing Feiyan Piston Ring Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2021-03-02
Anticipated expiration: 2030-04-21

Abstract

The utility model discloses a piston ring with excircle slot, including first way gaseous ring, first way gaseous ring includes gaseous ring body and excircle slot, and the gaseous ring body is the ring form, and excircle slot circumference distributes at the outer disc of gaseous ring body to a plurality of interval distribution. Compared with the prior art, the utility model discloses a carry out special machining to the excircle face, make it have the slot of circumference, effectively reduced and drawn the jar risk to during operation can store machine oil in the piston ring excircle slot, can store the carbon deposit that the burning produced, effectively reduce wearing and tearing.

Description

Piston ring with excircle groove

Technical Field

The utility model relates to a piston ring with excircle slot belongs to internal-combustion engine piston ring technical field.

Background

The first gas ring of the piston is processed by chrome plating on the outer circular surface and is processed by barrel surface honing, which has the advantages of wear resistance and low cost.

On the other hand, the first gas ring is closest to the combustion chamber of the piston, so that the first gas ring bears the maximum thermal load and mechanical load, the first gas ring reciprocates at high speed during working, the average linear velocity reaches about 11m/s, the first gas ring is influenced by high temperature and reciprocating motion reversing, the lubrication effect of the first gas ring is the worst, the first gas ring is easy to have cylinder pulling failure, and on the other hand, part of carbon deposition generated by combustion is positioned between the outer circular surface of the first gas ring and the cylinder wall, and the first gas ring and the cylinder wall are easy to have abrasive wear.

There are many solutions to the above problems with low friction, high hardness, tensile cylinder piston ring coating materials, such as molybdenum spray, PVD, DLC, etc., but these solutions tend to be costly.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at the above-mentioned technical problem, provide a piston ring with excircle slot, be applicable to the internal-combustion engine piston ring.

The technical scheme is as follows: in order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a piston ring with excircle slot, includes first way gas ring, first way gas ring includes gas ring body and excircle slot, and the gas ring body is the ring form, and excircle slot circumference distributes at the outer disc of gas ring body to a plurality of interval distribution.

Preferably, the method comprises the following steps:

an excircle groove is distributed at the center line of the gas ring body, and the rest excircle grooves are distributed in the center line in an up-and-down symmetrical manner.

An excircle groove is distributed at the position of the center line of the gas ring body, other excircle grooves are distributed on the center line in an up-and-down asymmetrical mode, and the number of the grooves below the center line is more than that of the grooves above the center line according to the use state.

The gas ring body is a nodular cast iron material gas ring, the cross section of the ring can be in a rectangular, wedge-shaped or trapezoidal structure, the inner circular surface can be chamfered or inverted and internally tangent table to form a distorted ring, the outer circle can be in a full-plating, semi-embedding or embedding chromium plating mode, and the outer circular surface is in a symmetrical barrel surface structure.

As shown in fig. 3, the depth t of the outer circumferential groove is 0.02 to 0.12mm, preferably 0.04 to 0.10mm, and more preferably 0.05 to 0.08 mm.

The width w of the excircle groove is 0.05-0.25 mm, preferably 0.05-0.20 mm.

The distance b between the outer circular grooves is 0.25-0.55 mm, preferably 0.3-0.5 mm.

The included angle alpha of the inclined plane of the outer circle groove is 60-100 degrees, and 70-90 degrees is preferable.

The piston ring further comprises a second gas ring and an oil ring.

The utility model discloses, through processing the excircle face, make the excircle face have the required slot of design, can store lubricating oil in the slot during operation, prevent that ring and cylinder wall from taking place the direct contact phenomenon of metal, therefore has effectively reduced and has drawn the jar risk; meanwhile, carbon deposition generated by combustion can be accumulated in the grooves in the movement process, so that abrasion of abrasive materials is prevented, and abrasion of the ring and the cylinder is reduced;

compared with the prior art, the utility model has the advantages as follows:

1. the patent provides a low-cost scheme, the conventional chromium plating treatment is still adopted, but the outer circular surface is improved to form a groove required by design, lubricating oil can be stored in the groove during working, and the phenomenon that the ring is in direct metal contact with the cylinder wall is prevented, so that the risk of cylinder pulling is effectively reduced; meanwhile, carbon deposition generated by combustion can be accumulated in the grooves in the movement process, so that abrasion of abrasive materials is prevented, and abrasion of the ring and the cylinder is reduced;

2. the excircle groove of the device has the characteristic of convenience in processing;

3. the product is suitable for non-road diesel engines such as marine engines, industrial and mining machines, agricultural machines, generator sets and the like.

Has the advantages that: compared with the prior art, the utility model discloses a carry out special machining to the excircle face, make it have the slot of circumference, effectively reduced and drawn the jar risk to during operation can store machine oil in the piston ring excircle slot, can store the carbon deposit that the burning produced, effectively reduce wearing and tearing.

Drawings

FIG. 1 is a front view of a first gas ring of the piston ring of the present invention;

FIG. 2 is an external circle outline drawing of the first gas ring of the piston ring of the present invention;

FIG. 3 is a drawing showing the outline parameters of the outer circle of the first gas ring of the piston ring of the present invention;

FIG. 4 is a view showing a state of use of the first ring of the piston ring according to the present invention;

FIG. 5 is a design drawing of the outer circle profile of the first ring of the piston ring of the present invention;

FIG. 6 is a cross-sectional view of a first ring of the piston ring of the present invention with a rectangular cross-section;

FIG. 7 is a cross-sectional view of a first ring of the piston ring according to the present invention, wherein the cross-section of the first ring is wedge-shaped;

fig. 8 is a cross-sectional view of the first ring of the piston ring of the present invention when the cross-section is trapezoidal.

Detailed Description

The structure of the device of the present invention will be further described with reference to the accompanying drawings.

The utility model provides a piston ring with excircle slot, as shown in fig. 1 and 2, includes first way gas ring, first way gas ring includes gas ring body 1 and excircle slot 2, and gas ring body 1 is the ring form, and 2 circumference distributions in the excircle face of gas ring body 1 of excircle slot to a plurality of interval distributions.

The gas ring body 1 is a nodular cast iron gas ring, as shown in fig. 6, 7 and 8, the cross section of the ring can be in a rectangular, wedge or trapezoidal structure, the inner circular surface can also be chamfered or inverted internally tangent table to form a twisted ring, and the outer circle can be in full plating, semi-embedding or embedding chromium plating.

The number of the grooves 2 on the outer circle depends on the height of the ring, and if the height of the ring is h1, the number of the grooves is (h1-0.6)/0.6, and then rounding is carried out. As a variation of the design.

Firstly, a circumferential excircle groove 2 is arranged at the position of the center line of the ring, and the rest grooves are asymmetrically distributed on the center line up and down, and referring to the use state of FIG. 4, a large number of grooves are arranged below the center line;

the nominal cylinder diameter of the first gas ring is 123.80mm, the ring height is 3.0mm, the radial thickness is 4.7mm, the trapezoidal section is more than 0.10mm in the thickness of the chromium layer, the general outline of the excircle is in a symmetrical barrel surface state, the barrel surface degree is 0.005-0.020 mm according to the ISO standard, the outline parameters of the excircle are selected as shown in figure 5, and 4 excircle grooves 2 are totally arranged:

the depth t of the groove is 0.08mm, the width w of the groove is 0.18mm, the distance b of the grooves is 0.4mm, and the included angle alpha of the inclined surface of the groove before plating is 60-100 degrees, preferably 70-90 degrees.

Claims

1. The utility model provides a piston ring with excircle slot, its characterized in that includes first way gas ring, first way gas ring includes gas ring body (1) and excircle slot (2), and gas ring body (1) is the ring form, and excircle slot (2) circumference distributes at the outer disc of gas ring body (1) to a plurality of interval distribution.

2. The piston ring with the outer circumferential groove as set forth in claim 1, wherein one outer circumferential groove (2) is formed at a center line of the gas ring body (1), and the remaining outer circumferential grooves are formed in an up-down symmetrical manner at the center line.

3. The piston ring with the outer circular grooves as claimed in claim 1, wherein one outer circular groove (2) is distributed at a center line position of the gas ring body (1), and the remaining outer circular grooves are asymmetrically distributed up and down the center line, and the number of grooves below the center line is greater than the number of grooves above with reference to a use state.

4. The piston ring with the outer circumferential groove as set forth in claim 1, wherein the gas ring body (1) is a gas ring of a ductile cast iron material, and the outer circumferential surface is subjected to chromium plating in the form of full plating, half-insert plating or insert chromium plating.

5. The piston ring with the outer circular groove as claimed in claim 1, wherein the cross section of the gas ring body (1) is a rectangular, wedge-shaped or trapezoidal structure, or the gas ring body (1) is a twisted ring; the outer circle surface of the air ring body (1) is of a symmetrical barrel surface structure.

6. The piston ring with the outer circumferential groove as set forth in claim 1, wherein the depth t of the outer circumferential groove (2) is 0.02 to 0.12 mm.

7. The piston ring with the outer circular groove as claimed in claim 1, wherein the width w of the outer circular groove (2) is 0.05-0.25 mm.

8. The piston ring with the outer circular groove as claimed in claim 1, wherein the distance b between the outer circular grooves (2) is 0.25-0.55 mm.

9. The piston ring with the outer circular groove as claimed in claim 1, wherein the inclined surface angle α of the outer circular groove (2) is 60-100 °.

10. The piston ring having an outer circumferential groove as set forth in claim 1, further comprising a second gas ring and an oil ring.