CN218177332U

CN218177332U - Piston with asymmetric wear-resisting ring and engine

Info

Publication number: CN218177332U
Application number: CN202221696942.4U
Authority: CN
Inventors: 陈勇; 黄魏楼; 王强
Original assignee: Anqing Art TP Pistons Co Ltd
Current assignee: Anqing Art TP Pistons Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-12-30
Anticipated expiration: 2032-06-30

Abstract

The utility model discloses a piston and engine with asymmetric wear-resisting ring relates to piston product field, the utility model discloses simple structure, because the load that the lateral part received along the piston axial of piston ring groove is far less than along the lateral part downwards, through adjusting the wear-resisting ring in the piston ring groove to asymmetric form, reduce wear-resisting ring self weight, adjust and inject the size of wear-resisting ring itself simultaneously, not only can reduce the weight of wear-resisting ring itself, can also keep its original intensity, compare in the setting mode who adopts the wear-resisting ring of symmetry type among the prior art, the utility model discloses under the prerequisite that keeps wear-resisting ring self intensity and piston ring bank intensity, can effectively reduce the weight of wear-resisting ring self to the influence of piston weight is reduced.

Description

Piston with asymmetric wear-resisting ring and engine

Technical Field

The utility model relates to a piston product field specifically is a piston and engine with asymmetric wear ring.

Background

With the development trend, the requirement on the engine is higher and higher. The Pmax and power of the engine are higher and higher, i.e. the explosion piston is subjected to higher and higher explosion pressure and temperature. The TOP ring groove of an aluminum alloy piston is the most susceptible location for wear and the 2ND ring land is the most susceptible location for fracture. In this context, in order to increase the ability to withstand high burst pressure and temperature, a symmetrical wear ring (material: high nickel alloy) design is added at the TOP ring groove.

Although the symmetrical wear-resisting ring design in the prior art improves the wear resistance of the TOP ring groove and the strength of the 2ND ring land, the density of the high-nickel alloy is about 2.8 times that of the aluminum alloy, so the design is not beneficial to the light weight of the piston. In order to reduce the influence on the weight of the piston as much as possible, the asymmetric wear-resisting ring is designed, and the self weight of the wear-resisting ring is reduced, so that the influence on the weight of the piston is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a piston and engine with asymmetric wear-resisting ring is through adjusting piston wear-resisting ring to asymmetric form, and to the adjustment of the wear-resisting ring size of asymmetric form to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a piston with an asymmetric wear-resisting ring comprises the wear-resisting ring, and the thickness L of the wear-resisting ring along the axial upper side part of the piston meets the condition that L is more than or equal to 1mm and less than 1.5mm.

As a further aspect of the present invention: the thickness L of the upper side part of the wear-resistant ring along the axial direction of the piston meets the condition that L is more than or equal to 1.25mm and less than 1.5mm.

As a further aspect of the present invention: the thickness S of the wear-resistant ring along the axial direction of the piston meets the condition that S is more than or equal to 3.5mm and less than or equal to 6mm.

An engine comprising a piston of the type described above having asymmetric wear rings.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses novel structure, because the load that the piston ring groove received along the axial upper side portion of piston is far less than along the axial lower side portion of piston, through adjusting the wear-resisting ring in the piston ring groove for asymmetric form, reduce wear-resisting ring self weight, adjust and prescribe a limit to the size of wear-resisting ring itself simultaneously, not only can reduce the weight of wear-resisting ring itself, can also keep its original intensity, compare in the setting mode that adopts the wear-resisting ring of symmetry type among the prior art, the utility model discloses under the prerequisite that keeps wear-resisting ring self intensity and piston ring bank intensity, can effectively reduce the weight of wear-resisting ring self to the reduction is to the influence of piston weight.

Drawings

FIG. 1 is a schematic structural view of an asymmetric wear ring of a piston along an axial section of the piston;

FIG. 2 is an enlarged view of the portion A of FIG. 1;

FIG. 3 is a schematic view of a prior art piston with symmetrical wear rings along an axial cross-section of the piston;

FIG. 4 is an enlarged view of the portion B of FIG. 2;

in the figure: 10-piston, 11-wear ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, 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.

As shown in fig. 2 and 4, in the embodiment of the present invention, a piston with an asymmetric wear ring includes a wear ring 11, and a thickness L of the wear ring 11 along an axial upper side portion of the piston 10 satisfies: l is larger than or equal to 1mm and smaller than 1.5mm, the thickness limit range of the wear-resisting ring along the axial direction of the piston meets S is larger than or equal to 3.5mm and smaller than or equal to 6mm, the load on the TOP ring groove of the piston is different due to different engine explosion pressures, the whole thickness of the wear-resisting ring needs to be limited in order to achieve sufficient strength, if the thickness is too small, the TOP ring groove cannot achieve sufficient strength, and if the thickness is too large, the light weight of the wear-resisting ring cannot be guaranteed.

In the practical application process, the load of the wear-resisting ring is uneven, and the load of the wear-resisting ring on the upper side part along the axial direction of the piston is far smaller than that of the wear-resisting ring on the lower side part along the axial direction of the piston; the thickness of the upper side part and the lower side part of the wear-resistant ring is reduced along the axial direction of the piston, so that the upper side part and the lower side part of the wear-resistant ring are in an asymmetric form, the whole weight of the wear-resistant ring can be reduced, the whole weight of the piston is reduced, and the strength (safety factor) of a TOP ring bank of the piston with the wear-resistant ring is not influenced.

To verify the effectiveness and specificity of the above-mentioned limited range, the following experimental verification is made:

TABLE 1

Note: the safety coefficient is more than 1, thus meeting the strength requirement of the TOP ring land of the piston.

From the experimental data in table 1 above, it can be derived:

1. from comparative example 1-2 and example 1-3, it is seen that along with the increase of L numerical value, wear-resisting ring weight increases gradually, and the value of piston TOP ring land intensity (factor of safety) increases gradually, and the smaller the L numerical value, the smaller the weight of wear-resisting ring is, can realize the lightweight of wear-resisting ring more in theory, but L numerical value is smaller, and the corresponding piston TOP ring land intensity is less, the utility model discloses a to the restriction of L numerical value, can enough reduce the weight of wear-resisting ring, realize the lightweight of piston, can guarantee the intensity of piston TOP ring land again.

2. From embodiment 1-2 and embodiment 3, it can be seen that the range defined by the present invention can effectively reduce the weight of the piston in the prior art, and the piston TOP ring land strength is reduced, but always within the safety factor.

To sum up, the utility model discloses according to the atress condition of wear-resisting ring itself, set up wear-resisting ring into asymmetric form along piston axial's last lateral part and lower lateral part, through the wear-resisting ring of attenuate along piston axial's last lateral part thickness, under the prerequisite of guaranteeing the intensity of wear-resisting ring itself, effectively reduce the weight of wear-resisting ring itself, and then reduced the weight of piston itself.

The utility model discloses novel structure, the operation is stable, because the load that the piston ring groove received along the lateral part in the piston shaft direction is far less than along the lateral part in the piston shaft direction, through adjusting the wear-resisting ring in the piston ring groove for asymmetric form, reduces wear-resisting ring self weight, adjusts and prescribes a limit to the size of wear-resisting ring itself simultaneously, not only can reduce the weight of wear-resisting ring itself, can also keep its original intensity, compares in the wear-resisting ring's of adoption symmetry type setting mode among the prior art, the utility model discloses under the prerequisite that keeps wear-resisting ring self intensity and piston ring bank intensity, can effectively reduce the weight of wear-resisting ring self to reduce the influence to piston weight.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A piston with an asymmetric wear-resisting ring comprises the wear-resisting ring, and is characterized in that the thickness L of the upper side part of the wear-resisting ring along the axial direction of the piston meets the condition that L is more than or equal to 1mm and less than 1.5mm.

2. The piston as claimed in claim 1, wherein the thickness L of said wear ring along the axial upper portion of the piston is 1.25mm L < 1.5mm.

3. The piston as claimed in claim 1, wherein a thickness S of said wear ring in the axial direction of the piston is 3.5 mm. Ltoreq. S.ltoreq.6 mm.

4. An engine comprising a piston with asymmetric wear rings as claimed in any one of claims 1 to 3.