Cast iron air compressor piston ring capable of enhancing sealing performance

Abstract

The cast iron air compressor piston ring capable of enhancing the sealing performance comprises a piston embedding section, a limiting piece is fixedly installed on the outer side of the piston embedding section, a heat dissipation oil hole is formed in the surface of the piston embedding section, meanwhile, a front face oil scraping ring is fixedly installed on one side of the surface of the limiting piece, and a back face oil scraping ring is fixedly installed on the other side of the surface of the limiting piece. A back face oil scraping ring is fixedly installed on the other side of the surface of the limiting piece, an oil discharging hole is formed in the back face oil scraping ring, and a notch is formed in the piston embedding section. According to the cast iron air compressor piston ring capable of enhancing the sealing performance, the side walls of the front face oil scraping ring and the back face oil scraping ring make contact with the inner wall of an oil cylinder correspondingly, and two sealing structures are formed; the oil scraping groove can play a certain sealing role; when the sealing strip is tightly attached to the wall of the air cylinder, oil in the oil containing groove can form a layer of oil film, the sealing effect is improved, and compressed air is prevented from leaking.

Description

Technical Field

[0001] This utility model relates to the field of air compressor accessories, specifically a cast iron air compressor piston ring with enhanced sealing performance. Background Technology

[0002] Piston rings are sealing elements installed on the piston of an air compressor. They prevent compressed air from leaking from the cylinder into the crankcase, ensuring the air compressor can build up sufficient pressure. The piston rings fit tightly against the cylinder wall, forming a dynamic seal and preventing gas leakage from the gap between the piston and the cylinder wall. Their working principle is as follows: when the piston reciprocates within the cylinder, the piston rings slide against the cylinder wall under the piston's influence. Due to their elasticity, the piston rings remain tightly against the cylinder wall, thus achieving functions such as sealing, oil control, and heat conduction. During compression, the piston rings rely on their own elasticity and gas pressure to seal the gas within the compression space. The oil rings, through their scraping action, control the amount of lubricating oil on the cylinder wall.

[0003] In actual use, three sets of sealing strips are installed on the outside of the piston inside the air compressor. The cross-sectional shape of the sealing strips is not designed properly and cannot effectively scrape off the lubricating oil. Utility Model Content

[0004] The purpose of this invention is to provide a cast iron air compressor piston ring with enhanced sealing performance to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, a cast iron air compressor piston ring with enhanced sealing performance is provided, comprising a piston embedding section, a limiting plate fixedly installed on the outer side of the piston embedding section, and a heat dissipation oil hole opened on the surface of the piston embedding section. Meanwhile, a front oil scraper ring is fixedly installed on one side of the surface of the limiting plate, and a back oil scraper ring is fixedly installed on the other side of the surface of the limiting plate. An oil drain hole is opened on the back oil scraper ring, and a notch is opened on the piston embedding section.

[0006] Preferably, the piston embedding section and the limiting plate are concentric circles, and the width of the piston embedding section is smaller than the width of the limiting plate.

[0007] Preferably, the piston insert section is fitted into the outer groove of the piston inside the air compressor, and the limiting piece on the outer side of the piston insert section covers the outer surface of the piston.

[0008] Preferably, six sets of cooling oil holes are evenly opened on the surface of the piston embedding section, and the cooling oil holes are in a straight line shape, while both ends of the cooling oil holes are circular.

[0009] Preferably, the front oil scraper ring and the back oil scraper ring are concentric circles with the same thickness. An oil-receiving groove is provided between the front oil scraper ring and the back oil scraper ring, and the cross-section of the oil-receiving groove is dovetail-shaped.

[0010] Preferably, the surface of the back oil scraper ring is evenly provided with multiple sets of oil drain holes, and the oil drain holes are arranged in an arc shape.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model forms two sealing structures by having the side walls of the front oil scraper ring and the back oil scraper ring contact the inner wall of the oil cylinder respectively; the oil scraper groove can play a certain sealing role; when the sealing strip is tightly attached to the cylinder wall, the oil inside the oil-containing groove can form an oil film, which increases the sealing effect and prevents compressed air leakage.

[0013] 2. In this invention, when the piston moves up and down inside the cylinder, the oil-receiving groove provides a specific channel for the flow of lubricating oil. When the sealing strip contacts the cylinder wall, it can more effectively concentrate and guide the lubricating oil into the oil scraping groove, thereby enhancing the oil scraping effect; it can scrape the lubricating oil on the cylinder wall more quickly and thoroughly. Attached Figure Description

[0014] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Cross-sectional view;

[0016] Figure 3 for Figure 1 The front view;

[0017] Figure 4 for Figure 1 Top view.

[0018] The following are labeled in the diagram: 1. Piston insertion section; 2. Cooling oil hole; 3. Limiting plate; 4. Front oil scraper ring; 5. Back oil scraper ring; 6. Oil drain hole; 7. Oil receiving groove. Detailed Implementation

[0019] Please see Figure 1-4 This utility model provides a cast iron air compressor piston ring with enhanced sealing performance, including a piston embedding section 1, a limiting plate 3 fixedly installed on the outer side of the piston embedding section 1, and a heat dissipation oil hole 2 opened on the surface of the piston embedding section 1. At the same time, a front oil scraper ring 4 is fixedly installed on one side of the surface of the limiting plate 3, and a back oil scraper ring 5 is fixedly installed on the other side of the surface of the limiting plate 3. An oil drain hole 6 is opened on the back oil scraper ring 5, and a notch is opened on the piston embedding section 1.

[0020] Working Principle: In use, this sealing strip is first installed on the outside of the air compressor piston. When the air compressor piston moves, an oil-receiving groove 7 is set between the front oil scraper ring 4 and the back oil scraper ring 5 on the outside of the sealing strip. In addition, two other sets of conventional sealing strips are installed on the outside of the piston as a secondary seal between the piston and the cylinder. This sealing strip can serve as the primary seal between the piston and the cylinder. The side walls of the front oil scraper ring 4 and the back oil scraper ring 5 respectively contact the inner wall of the cylinder, forming a double sealing structure. When the piston moves up and down inside the cylinder, the oil-receiving groove 7 provides a specific channel for the flow of lubricating oil. When the sealing strip contacts the cylinder wall, it can more effectively concentrate and guide the lubricating oil into the oil scraper groove, thereby enhancing the oil scraping effect. It can more quickly and thoroughly scrape the lubricating oil on the cylinder wall. Simultaneously, the oil-receiving groove 7... The internal oil ensures the piston operates in good condition: continuous lubrication makes the piston move more smoothly, reducing jamming and resistance, and improving the efficiency and stability of the air compressor; the oil scraper groove can play a certain sealing role; when the sealing strip is tightly fitted to the cylinder wall, the oil inside the oil-containing groove 7 can form an oil film, increasing the sealing effect and preventing compressed air leakage; at the same time, the scraped lubricating oil will not re-enter the compressed air system, ensuring the quality of compressed air; six sets of cooling oil holes 2 are evenly opened on the surface of the piston embedded section 1, and the oil can pass through the cooling oil holes 2 to contact the piston side wall, continuously providing lubrication to the piston during piston movement. The piston generates a lot of heat; after the oil comes into contact with the outer side wall of the piston, it can absorb some of the heat and carry it away through flow, playing a role in heat dissipation.

[0021] The piston insertion section 1 and the limiting plate 3 are concentric circles, and the width of the piston insertion section 1 is smaller than the width of the limiting plate 3.

[0022] In a preferred embodiment, the piston insert section 1 is fitted into the outer groove of the piston inside the air compressor, and the limiting piece 3 on the outer side of the piston insert section 1 covers the outer surface of the piston.

[0023] Six sets of cooling oil holes 2 are evenly opened on the surface of the piston embedding section 1, and the cooling oil holes 2 are in a straight line shape, while both ends of the cooling oil holes 2 are circular.

[0024] In a preferred embodiment, the front oil scraper ring 4 and the back oil scraper ring 5 are concentric circles, and the thickness of the front oil scraper ring 4 and the back oil scraper ring 5 is the same. At the same time, an oil-receiving groove 7 is provided between the front oil scraper ring 4 and the back oil scraper ring 5, and the cross-section of the oil-receiving groove 7 is dovetail-shaped.

[0025] Multiple sets of oil drain holes 6 are evenly opened on the surface of the back oil scraper ring 5, and the oil drain holes 6 are set in an arc shape.

Claims

1. A cast iron air compressor piston ring with enhanced sealing performance, comprising a piston insert section (1), characterized in that: A limiting plate (3) is fixedly installed on the outside of the piston embedding section (1), and a heat dissipation oil hole (2) is opened on the surface of the piston embedding section (1). At the same time, a front oil scraper ring (4) is fixedly installed on one side of the surface of the limiting plate (3), and a back oil scraper ring (5) is fixedly installed on the other side of the surface of the limiting plate (3). An oil drain hole (6) is opened on the back oil scraper ring (5), and a notch is opened on the piston embedding section (1).

2. The cast iron air compressor piston ring with enhanced sealing performance according to claim 1, characterized in that: The piston embedding section (1) and the limiting piece (3) are concentric circles, and the width of the piston embedding section (1) is smaller than the width of the limiting piece (3).

3. The cast iron air compressor piston ring with enhanced sealing performance according to claim 1, characterized in that: The piston insert section (1) is fitted into the outer groove of the piston inside the air compressor, and the limiting piece (3) on the outer side of the piston insert section (1) covers the outer surface of the piston.

4. A cast iron air compressor piston ring with enhanced sealing performance according to claim 1, characterized in that: The piston embedding section (1) has six sets of cooling oil holes (2) evenly opened on its surface, and the cooling oil holes (2) are in a straight line shape, while both ends of the cooling oil holes (2) are circular.

5. A cast iron air compressor piston ring with enhanced sealing performance according to claim 1, characterized in that: The front oil scraping ring (4) and the back oil scraping ring (5) are concentric circles, and the thickness of the front oil scraping ring (4) and the back oil scraping ring (5) is the same. At the same time, an oil-containing groove (7) is provided between the front oil scraping ring (4) and the back oil scraping ring (5), and the cross-section of the oil-containing groove (7) is dovetail-shaped.

6. A cast iron air compressor piston ring with enhanced sealing performance according to claim 1, characterized in that: Multiple sets of oil drain holes (6) are evenly opened on the surface of the back oil scraper ring (5), and the oil drain holes (6) are arc-shaped.

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