CN215672475U

CN215672475U - Asymmetric trapezoidal surface piston ring

Info

Publication number: CN215672475U
Application number: CN202121324083.1U
Authority: CN
Inventors: 郑照刚; 曹存军; 张长春
Original assignee: Nanjing Feiyan Piston Ring Co ltd
Current assignee: Nanjing Feiyan Piston Ring Co ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-01-28
Anticipated expiration: 2031-06-15

Abstract

The utility model discloses an asymmetric trapezoidal piston ring, which comprises a piston ring body, an upper trapezoidal surface, a lower trapezoidal surface, an inner ring surface and an outer ring surface, wherein the inclined angle between the upper trapezoidal surface and the horizontal direction is 10 'to 30' larger than that between the lower trapezoidal surface and the horizontal direction, and a wear-resistant layer is arranged on the outer side surface of the piston ring. The asymmetric trapezoidal piston ring is not easy to generate carbon deposition snap rings in the using process, has good air cylinder sealing performance, improves the energy utilization rate and the safety performance of an engine, and is suitable for popularization and use.

Description

Asymmetric trapezoidal surface piston ring

Technical Field

The utility model relates to an asymmetric trapezoidal piston ring, and belongs to the field of engine parts.

Background

The piston ring is an important part in a piston connecting rod group of a crank connecting rod mechanism in an engine, and mainly plays a role in isolating fuel gas, preventing leakage and conducting heat of the piston outwards. In actual work, especially in a relatively large-power engine, the abnormal conditions of cylinder scuffing and carbon deposition snap rings are accompanied, although the existing symmetrical trapezoidal piston ring makes certain optimization and improvement aiming at the phenomenon of the carbon deposition snap rings, the existing symmetrical trapezoidal piston ring is just arranged symmetrically because the angles of an upper step angle and a lower step angle are equal, and the tolerance generated by the step angles in actual production is also caused.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims to provide an asymmetric trapezoidal piston ring which is not easy to deposit carbon, has good air cylinder sealing performance and improves the energy utilization rate and the safety performance of an engine.

The technical scheme is as follows: the asymmetric trapezoidal piston ring comprises a piston ring body, an upper trapezoidal surface, a lower trapezoidal surface, an inner circular surface and an outer circular surface, wherein the inclined included angle between the upper trapezoidal surface and the horizontal direction is 10 'to 30' larger than that between the lower trapezoidal surface and the horizontal direction.

Because the piston ring always rubs up and down on the cylinder wall when in use, the outer side of the outer circle surface of the piston ring is provided with the wear-resistant layer, thereby playing a role in protecting the piston ring body and prolonging the service life.

Furthermore, the wear-resistant layer is an outer arc surface and can be better contacted with the cylinder wall.

Furthermore, a plurality of piston rings are arranged in the engine, and the piston rings play a better role in separating and transferring heat.

In order to be able to better transmit the heat generated by the piston during operation to the cylinder wall and further to the outside, the piston ring body is made of a high thermal conductivity alloy material.

Has the advantages that: compared with the prior art, the utility model has the following remarkable advantages: the asymmetric trapezoidal surface avoids the abnormal state of the carbon deposition snap ring and simultaneously ensures the air tightness of the close contact between the sealing surface and the piston ring groove; the air leakage and the resource waste of the engine are reduced, and the energy utilization rate is improved; reduces the discharge amount and better protects the environment.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

fig. 2 is a schematic diagram comparing the working states of the prior piston ring and the piston ring of the present invention.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings.

As shown in fig. 1, the asymmetric tread piston ring of the present invention includes a piston ring body 1, an upper tread 2, a lower tread 3, an inner circular surface 4 and an outer circular surface 5, and a wear-resistant layer 6 is disposed on the outer side of the outer circular surface 5 of the piston ring, so as to protect the piston ring body 1 and prolong the service life.

Wherein, if the included angle between the upper tread 3 and the lower tread 3 is set as alpha, the inclined included angle between the upper tread 2 and the horizontal direction is 10 'to 30' larger than that between the lower tread 3 and the horizontal direction, for example, the included angle between the upper tread 2 and the horizontal direction is (alpha/2) +15 ', and the included angle between the lower tread 3 and the horizontal direction is (alpha/2) -15'.

The wear-resistant layer 6 is an outer arc surface and can be better contacted with the cylinder wall.

In practical use, in order to achieve better effects of separation and heat transfer, a plurality of piston rings can be arranged in the engine, and the heat transfer is separated through the joint work of the plurality of piston rings. Further, in order to better transfer heat generated by the piston during operation to the cylinder wall and then to the outside, the piston ring body 1 is made of a high thermal conductive alloy material.

As shown in fig. 2, the left side is current piston ring, because the domatic trapezoidal face that is symmetrical of current piston ring, the equal symmetry setting of upper and lower trapezoidal angle, the tolerance that the trapezoidal angle produced in the actual production in addition, and the radial vibrations that receive when the piston ring moves, the lower trapezoidal face and the piston ring groove of piston ring are not close face contact, but uncertain line contact, the perfect sealed effect of predesigned can't be realized, cause the trapezoidal face to seal badly, cause gas leakage and burning, the oil channeling of engine, cause energy utilization not high, also have the potential safety hazard in the extravagant time. The asymmetric trapezoidal piston ring on the right side has larger cutting amount of the upper trapezoidal surface than that of the lower trapezoidal surface through the angle difference of the upper trapezoidal surface and the lower trapezoidal surface, so that the actual positive distortion of the upper trapezoidal surface in the piston ring motion is formed, and the gas in a combustion chamber can be effectively prevented from flowing downwards in the process of going upwards and downwards of the piston ring due to the positive distortion formed by the abnormal shape of the upper trapezoidal angle difference and the lower trapezoidal angle difference, so that the gas leakage amount and the engine oil consumption of an engine are reduced, and the service lives of the piston ring and the engine are greatly prolonged.

In order to more clearly understand the optimization degree of the asymmetric trapezoidal piston ring in the practical use process, comparative experiments are carried out on engines discharged by 4102 series T4 and 4108 series T4 in a certain engine factory, and the experimental conclusion is obtained: the air leakage of the piston is averagely reduced by 9L/min, the engine oil consumption is averagely reduced by 0.05g/kwh, and the discharge capacity completely meets the discharge requirement of T4. After the experiment is finished, the piston ring is checked, and obvious abnormal conditions such as cylinder scuffing, carbon deposition or serious abrasion and the like do not occur to the piston ring. The asymmetric trapezoidal piston ring of the utility model is further proved to be effectively improved in closed exhaust and energy utilization rate improvement.

Claims

1. The asymmetric trapezoidal piston ring comprises a piston ring body (1), an upper trapezoidal surface (2), a lower trapezoidal surface (3), an inner circular surface (4) and an outer circular surface (5), and is characterized in that the inclination angle of the horizontal direction of the upper trapezoidal surface (2) is 10 'to 30' greater than that of the horizontal direction of the lower trapezoidal surface (3).

2. The asymmetric stepped piston ring according to claim 1, wherein a wear resistant layer (6) is provided on the outer side of said outer circumferential surface (5).

3. The asymmetric land piston ring as claimed in claim 2, wherein said wear resistant layer (6) is an outer arc surface in contact with the cylinder wall.

4. The asymmetric rifled piston ring as set forth in claim 1 wherein said piston ring is provided in plural numbers within an engine.

5. The asymmetric stepped piston ring according to claim 1, characterized in that said piston ring body (1) is made of a highly heat conductive alloy material.