Oil scraper ring structure of piston rod

Abstract

The oil scraper ring structure of the piston rod comprises an oil scraper ring body, a connecting groove is formed in the middle of the oil scraper ring body, a first blade portion and a second blade portion are integrally formed on the side wall of the connecting groove, a filling groove is formed in the side wall of the connecting groove, and a felt layer is filled in the filling groove. The oil stain removal effect on the outer wall of the piston rod can be improved through mutual matching of the first blade part and the second blade part, meanwhile, the felt layer with the oil scraping effect is additionally arranged in the product, and when the first blade part and the second blade part generate blade ellipses due to repeated friction of the piston rod, the felt layer is tightly attached to the side wall of the piston rod, so that the oil stain removal effect is improved. The oil scraping effect can be supplemented, so that the oil scraping ring still has a better oil scraping effect after being used for a long time, and the service life of the oil scraping ring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an oil scraper ring structure of a piston rod. Background Art

[0002] Compressors, as an indispensable mechanical equipment in industry and life, have the core function of compressing low-pressure gas into high-pressure gas to meet various process or power requirements. In this process, the piston rod is a key component connecting the piston and the drive device, and its operating state directly affects the performance and life of the compressor. The piston rod reciprocates at high speed inside the compressor, not only under great mechanical stress, but also inevitably in direct contact with lubricating oil, compressed gas and possible impurities. In this process, lubricating oil plays an important role in lubrication, sealing and cooling. However, over time, impurities such as tiny particles in the lubricating oil, metal debris and dust in the air will gradually accumulate on the surface of the piston rod, forming a thick layer of oil stains.

[0003] This layer of oil stains has many effects on the compressor. First, it increases the friction resistance between the piston rod and the cylinder body, resulting in increased energy consumption, increased temperature, and may even cause serious faults such as piston rod jamming. Second, the accumulation of oil stains will also damage the sealing performance of the compressor, causing gas leakage and reduced efficiency. Finally, impurities in the oil stains may also cause wear on the piston rod and cylinder body, shortening the service life of the compressor.

[0004] Usually, an oil scraper ring is provided on the outer wall of the piston rod. The reciprocating motion of the piston rod in the oil scraper ring scrapes away the oil stains and impurities on the surface of the piston rod to keep its surface clean and smooth. However, due to the long-term friction between the piston rod and the oil scraper ring during its use, the "blade" on the oil scraper ring is not an arc, but becomes an ellipse (i.e., the case of an elliptical blade), which makes it impossible to fit the outer diameter of the piston rod, resulting in poor oil scraping effect of the oil scraper ring and a low overall service life of the oil scraper ring. To this end, we propose an oil scraper ring structure for a piston rod. Utility Model Content

[0005] The utility model aims to provide an oil scraper ring structure for a piston rod to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil scraper ring structure for a piston rod, comprising an oil scraper ring body, a connecting groove is provided in the middle of the oil scraper ring body, a first cutting edge and a second cutting edge are integrally formed on the side wall of the connecting groove, a filling groove is provided on the side wall of the connecting groove, and a felt layer is filled in the filling groove.

[0007] Preferably, the oil scraper ring body is annular.

[0008] Preferably, the inclination angles of the first cutting edge and the second cutting edge are 75°.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: For an oil scraping ring structure of a piston rod, compared with the traditional oil scraping ring, the present product is provided with a first cutting edge and a second cutting edge. Through the mutual cooperation of the first cutting edge and the second cutting edge, the effect of removing oil stains on the outer wall of the piston rod can be improved. At the same time, a felt layer with an oil scraping effect is additionally provided in the present product. When the first cutting edge and the second cutting edge present an edge ellipse due to the repeated friction of the piston rod, through the close fit of the felt layer and the side wall of the piston rod, the oil scraping effect can be supplemented, so that the present product still has a good oil scraping effect after long-term use, and the service life of the oil scraping ring is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a perspective view of the present utility model.

[0011] Figure 2 is a structural schematic diagram of the present utility model.

[0012] Figure 3 is a front sectional view of the present utility model.

[0013] In the figure: 1. Oil scraping ring main body, 2. Connecting groove, 3. First cutting edge, 4. Second cutting edge, 5. Filling groove, 6. Felt layer, 7. Piston rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0015] Please refer to Figure 1 , Figure 2 and Figure 3 , the present utility model provides a technical solution: An oil scraping ring structure of a piston rod, including an oil scraping ring main body 1. The oil scraping ring main body 1 is in a ring shape and is made of a copper alloy metal material, so that it has better hardness and can effectively scrape the oil stains on the side wall of the piston rod 7 during use. A connecting groove 2 for the piston rod 7 to pass through is provided in the middle of the oil scraping ring main body 1. The side walls of the connecting groove 2 are integrally formed with a first cutting edge 3 and a second cutting edge 4 respectively. During the process of the piston rod 7 passing through the connecting groove 2, the oil stains on the side wall of the piston rod 7 can be scraped off through the cooperation of the first cutting edge 3 and the second cutting edge 4, and the side wall of the piston rod 7 can be kept clean.

[0016] The inclination angles of the first cutting edge 3 and the second cutting edge 4 are 75° respectively. By providing the first cutting edge 3 and the second cutting edge 4 inclined at 75°, the first cutting edge 3 and the second cutting edge 4 can better remove the oil stains on the side wall of the piston rod 7.

[0017] An annular filling groove 5 is formed in the inner side wall of the connecting groove 2, and a felt layer 6 is filled in the filling groove 5. The felt layer 6 keeps in contact with the side wall of the piston rod 7 when the piston rod 7 moves in the connecting groove 2. Since the friction during the movement of the piston rod 7 will cause deformation of the first cutting edge 3 and the second cutting edge 4, resulting in the situation of "elliptical cutting edge" for the first cutting edge 3 and the second cutting edge 4. The provided felt layer 6 can supplement the oil scraping effect of the oil scraping ring body 1. When the situation of "elliptical cutting edge" appears for the first cutting edge 3 and the second cutting edge 4, the felt layer 6 in contact with the side wall of the piston rod 7 can still provide good oil scraping treatment for the side wall of the piston rod 7, thereby extending the service life of the oil scraping ring.

Claims

1. An oil scraper ring structure for a piston rod, characterized in that: The invention comprises an oil scraper ring body (1), a connecting groove (2) is provided in the middle of the oil scraper ring body (1), a first blade portion (3) and a second blade portion (4) are integrally formed on the side wall of the connecting groove (2), a filling groove (5) is provided on the side wall of the connecting groove (2), and a felt layer (6) is filled in the filling groove (5).

2. The oil scraper ring structure of a piston rod according to claim 1, characterized in that: The oil scraper ring body (1) is annular.

3. The oil scraper ring structure of a piston rod according to claim 1, characterized in that: The inclination angle of the first cutting edge (3) and the second cutting edge (4) is 75°.

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