CN219139790U

CN219139790U - Double-nose oil ring

Info

Publication number: CN219139790U
Application number: CN202222905672.XU
Authority: CN
Inventors: 郑学云; 段银健; 昂强; 王东升; 张奕
Original assignee: Anqing TP Goetze Piston Ring Co Ltd
Current assignee: Anqing TP Goetze Piston Ring Co Ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-06-06
Anticipated expiration: 2032-11-02

Abstract

The utility model discloses a double-nose oil ring, which comprises two layers of cast iron rings arranged in a layer-by-layer mode, wherein the edge of the upper end of each cast iron ring is provided with an oil scraping edge chamfer, the edge of the bottom surface of each cast iron ring is provided with a nose cavity for buffering oil pressure, a ring groove for placing a wave-shaped lining spring is arranged between the two cast iron rings, and a plurality of oil leakage holes are formed in the inner wall of each ring groove. The utility model adopts the structure that the double-layer oil ring is combined with the nose cavity, so that the pressure of oil can be released in the nose cavity, the upward running of the oil is avoided, the function of the oil control ring is realized, in addition, the arrangement of the nose cavity increases the verticality of the sharp corner of the oil scraping edge and the contact width of the non-deforming side face, and the working performance and the service life of the oil ring are greatly improved.

Description

Double-nose oil ring

Technical Field

The utility model relates to the field of piston rings, in particular to a double-nose oil ring.

Background

The oil ring is generally made of alloy cast iron, a groove is cut in the middle of the outer round surface of the oil ring, and a plurality of through oil discharge holes or slits are formed in the bottom of the groove. The combined ring consists of an upper scraping blade, a lower scraping blade and a lining spring generating radial and axial elastic force. The oil ring scraping blade is thin, has high specific pressure on the cylinder wall and has strong oil scraping effect; the upper scraping blade and the lower scraping blade are independent, so that the adaptability to the air cylinder is good; the quality is small; the oil return passage is large. Therefore, the combination oil ring is widely used in high-speed engines. In general, 1-2 oil rings are used on the piston.

At present, in the use process of a common oil ring, oil pressure cannot be released in the up-and-down movement process of the oil ring, so that oil can flow upwards, in addition, the height of an original contact surface is reduced after the oil ring is worn, the oil scraping effect is reduced, and certain defects exist.

Therefore, there is a need to propose a double nose oil ring to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a double-nose oil ring, which is used for improving the oil scraping effect of the oil ring and ensuring the stable use of a piston ring.

In order to solve the technical problems, the utility model provides a double-nose oil ring, which comprises two layers of cast iron rings arranged in a layer-by-layer mode, wherein the outer edge of the upper end of each cast iron ring is provided with an oil scraping edge chamfer, the outer edge of the bottom surface of each cast iron ring is provided with a nose cavity for buffering oil pressure, a ring groove for placing a wave-shaped lining spring is arranged between the two cast iron rings, and a plurality of oil leakage holes are formed in the inner wall of each ring groove.

Further, two layers of cast iron rings are integrally formed.

Further, the chamfering angle of the oil scraping edge is 15+/-3 degrees.

Further, the oil drain holes are circumferentially distributed on the inner wall of the annular groove.

Further, the oil drain hole adopts one of a cylindrical hole and an arc hole.

Further, the cylindrical holes are formed by drilling, and the arc-shaped holes are formed by milling.

Compared with the prior art, the utility model has at least the following beneficial effects:

the utility model adopts the structure that the double-layer oil ring is combined with the nose cavity, so that the pressure of oil can be released in the nose cavity, the upward running of the oil is avoided, the function of the oil control ring is realized, in addition, the arrangement of the nose cavity increases the verticality of the sharp corner of the oil scraping edge and the contact width of the non-deforming side face, and the working performance and the service life of the oil ring are greatly improved.

Drawings

Fig. 1 is a schematic perspective view of a double-nose oil ring according to the present utility model;

FIG. 2 is a schematic top view of the double-nose oil ring of the present utility model;

fig. 3 is a schematic cross-sectional structure of the double-nose oil ring of the present utility model.

Detailed Description

The double-nose oil ring of the present utility model will be described in more detail below with reference to the schematic drawings, in which preferred embodiments of the present utility model are shown, it being understood that the utility model described herein may be modified by those skilled in the art, while still achieving the advantageous effects of the utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model.

The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. Advantages and features of the utility model will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.

As shown in fig. 1 to 3, an embodiment of the present utility model provides a double-nose oil ring, which includes two layers of cast iron rings 1 stacked together, wherein two layers of cast iron rings 1 are integrally formed, an oil scraping edge chamfer 2 is provided at an outer edge of an upper end of each cast iron ring 1, a nose cavity 3 for buffering oil pressure is provided at an outer edge of a bottom surface of each cast iron ring 1, a ring groove 4 for placing a wave-shaped lining spring is provided between two cast iron rings 1, and a plurality of oil drain holes 5 are provided on an inner wall of the ring groove 4.

In this embodiment, a double-nose oil ring is mounted in the third groove of the piston, which scrapes the cylinder wall during movement of the piston. The oil scraping part is designed into a nose shape with a constant section (namely a nose cavity 3), so that the original contact surface height of the oil ring can be maintained after the oil ring is worn in use, and the oil scraping effect can be maintained for a long time. Meanwhile, the pressure of the oil is released in the nose cavity 3, so that the upward running of the oil is avoided, and the oil control ring is realized.

In order to increase the radial pressure of the oil ring, a wave spring is provided in the ring groove 4. In the installation of the wave spring, the cast iron ring 1 needs to wrap the wave spring. The oil ring provided with the wave-shaped lining spring has large flexibility and good adaptability to the cylinder wall.

Further, the angle of the scraping edge chamfer angle 2 is 15+/-3 degrees.

Specifically, the arrangement of the oil scraping edge chamfer 2 can scrape redundant engine oil on the cylinder wall better, and scraped engine oil is discharged into the crankcase through the oil return hole of the piston.

Further, the oil drain holes 5 are circumferentially distributed on the inner wall of the ring groove 4.

Specifically, when the oil drain hole 4 is machined, the oil drain hole is drilled and milled, fig. 1 is an oil ring with a cylindrical hole formed by a drilling process, and fig. 2 is an oil ring with an arc hole formed by a milling process.

In addition, when the oil drain holes 5 are uniformly distributed circumferentially, the force of the engine oil passing through the oil drain holes 5 is uniform when the engine oil enters and is discharged, so that the use stability of the oil ring is ensured. In addition, the oil scraped off by the nose cavity 3 conveniently flows into the crankcase from the oil drain hole 5.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The double-nose oil ring is characterized by comprising two layers of cast iron rings which are arranged in a layer-by-layer mode, wherein an oil scraping edge chamfer is arranged at the outer edge of the upper end of each cast iron ring, a nose cavity used for buffering oil pressure is arranged at the outer edge of the bottom surface of each cast iron ring, a ring groove used for placing a wave-shaped lining spring is arranged between the two cast iron rings, and a plurality of oil leakage holes are formed in the inner wall of each ring groove.

2. The double-nose oil ring as claimed in claim 1, wherein two layers of said cast iron rings are integrally formed therebetween.

3. The double-nose oil ring as claimed in claim 1, wherein the wiper chamfer angle is 15±3°.

4. The double-nose oil ring as claimed in claim 1, wherein the oil drain holes are circumferentially distributed on the inner wall of the ring groove.

5. The double-nose oil ring as claimed in claim 1, wherein the oil drain hole is one of a cylindrical hole and an arc hole.

6. The double-nose oil ring as claimed in claim 5, wherein the cylindrical hole is formed by drilling and the arcuate hole is formed by milling.