CN213450616U

CN213450616U - Piston ring with automatic lubricating function

Info

Publication number: CN213450616U
Application number: CN202022547832.9U
Authority: CN
Inventors: 田大成; 田久刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-06-15
Anticipated expiration: 2030-11-06

Abstract

The utility model discloses a piston ring with self-lubricate function, including the piston ring body, its special character is: the piston ring is characterized in that a plurality of radial blind holes are formed in a friction surface of the piston ring body, the diameter of each radial blind hole is 0.8-2 mm, the depth of each radial blind hole is 1-2 mm, a graphite block is embedded and adhered in each blind hole, and the size of the graphite block is matched with that of each blind hole. The utility model discloses can realize that the solid-liquid is two lubricated, the membrane shifts and can greatly reduce the frictional temperature on piston ring surface when forming solid lubrication membrane, coefficient of friction is little, the noise is little, the high-speed operation of piston, prevents to produce and draws jar, locking phenomenon.

Description

Piston ring with automatic lubricating function

Technical Field

The utility model relates to an engine accessory, especially a piston ring with self-lubricate function.

Background

Piston rings are widely used in various power machines such as steam engines, diesel engines, gasoline engines, compressors, hydraulic machines, etc., and are core components of fuel engines, which perform sealing of fuel gas together with cylinders, pistons, cylinder walls, etc. The common automobile engines are diesel engines and gasoline engines, and the used piston rings are different due to different fuel properties, and the early piston rings are formed by casting, but with the technical progress, steel high-power piston rings are produced, and with the continuous improvement of the engine functions and environmental requirements, various advanced surface treatments are applied, such as thermal spraying, electroplating, chromium plating, gas nitriding, physical deposition, surface coating, zinc-manganese series phosphating and the like, so that the functions of the piston rings are greatly improved.

The functions of the piston ring include sealing, heat conduction (heat transfer), engine oil regulation (oil control) and guiding (supporting). Sealing: the gas is sealed, so that gas in a combustion chamber is prevented from leaking to a crankcase, the leakage amount of the gas is controlled to be the lowest limit, and the heat efficiency is improved. Air leakage not only reduces the power of the engine, but also deteriorates the engine oil, which is the main task of the air ring; adjusting machine oil (oil control): the redundant lubricating oil on the cylinder wall is scraped, and meanwhile, a thin oil film is distributed on the cylinder wall, so that the normal lubrication of the cylinder, the piston and the ring is ensured, which is the main task of the oil ring. In modern high-speed engines, the function of a piston ring for controlling an oil film is particularly emphasized; heat conduction: the heat of the piston is conducted to the cylinder sleeve through the piston ring, namely, the cooling effect is realized. Supporting: the piston ring keeps the piston in the cylinder, prevents piston and cylinder wall direct contact, guarantees the smooth-going motion of piston, reduces frictional resistance, prevents moreover that the piston from beating the jar. The piston of general fuel engine adopts two gas rings and one oil ring. The piston rings are chrome-plated steel rings, have very high hardness and no self-lubricating function, play a role in reducing wear by completely depending on an oil film, and when the temperature of an engine is too high, the lubricating function of engine oil is weakened, or the oil film becomes thin or completely disappears when the engine oil pump temporarily stops working, or the lubricating oil film disappears when the lubricating oil cannot be fully lubricated in cold winter, or the engine is placed for a long time and is not started, so that the engine cylinder sleeve can be seriously scratched, and the service life of the engine is greatly shortened.

The piston rings with the coating on the surface aim at improving hardness and resisting abrasion, have no antifriction function, and are easy to damage a cylinder body due to overhigh hardness. After a period of use, the coating is prone to peeling off and engine damage can also result. When the high-hardness piston ring is rubbed with the cylinder wall at a high speed, the surface of the piston ring generates a high temperature of more than 500 ℃ due to poor lubrication, so that the cylinder scuffing phenomenon is generated, and the piston ring is locked in a piston ring groove.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an solve the above-mentioned problem that prior art exists, provide a piston ring with self-lubricate function, can realize that solid-liquid is two lubricated, the membrane shifts and forms solid lubrication membrane, coefficient of friction is little, the noise is little, can greatly reduce the friction temperature on piston ring surface when the high-speed operation of piston, prevent to produce and draw the jar, the phenomenon of locking.

The utility model discloses a realize like this: the piston ring with the automatic lubricating function comprises a piston ring body, and is characterized in that: the piston ring is characterized in that a plurality of radial blind holes are formed in a friction surface of the piston ring body, the diameter of each radial blind hole is 0.8-2 mm, the depth of each radial blind hole is 1-2 mm, a graphite block is embedded and adhered in each blind hole, and the size of the graphite block is matched with that of each blind hole.

Furthermore, the radial blind holes are distributed in rows, and the horizontal arc length of the outer circular surface between two adjacent radial blind holes corresponding to the same row is 2-3.5 times of the diameter of each radial blind hole.

Further, the thickness of the piston ring body is 3-5 mm, and the radial blind holes are arranged in a row.

Further, the thickness of the piston ring body is larger than 5mm, and the radial blind holes are arranged in an upper row and a lower row.

Further, when the number of the radial blind holes is two, the two rows of the radial blind holes are arranged in a staggered mode.

The utility model has the advantages that: the solid lubricant-graphite is fixed on the cylinder wall when the piston ring is in friction with the cylinder wall by embedding the graphite block in the surface of the piston ring, the graphite also has the function of adsorbing lubricating oil, so that solid-liquid double lubrication is realized, a solid lubricating film is formed, film transfer is realized, the friction coefficient is small, the noise is low, the friction temperature on the surface of the piston ring can be greatly reduced when the piston runs at high speed, and the phenomena of cylinder pulling and locking are prevented.

Drawings

Fig. 1 is a schematic structural view of a piston ring having an automatic lubricating function according to embodiment 1 of the present invention;

FIG. 2 is a partially expanded view of the piston ring body of FIG. 1;

fig. 3 is a schematic structural view of a piston ring having an automatic lubricating function according to embodiment 2 of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is a bottom view of fig. 3.

Detailed Description

Example 1

As shown in fig. 1 and 2, the piston ring with the automatic lubricating function comprises a piston ring body 1 with a diameter of 114mm, a height of 3mm and a thickness of 4mm, wherein a row of radial blind holes 2 are arranged on a friction surface of the piston ring body 1, the diameter of the radial blind holes is 1mm, the depth of the radial blind holes is 1.2mm, the horizontal arc length L1 of the outer circumferential surface between two adjacent radial blind holes in the same row is 2.98 times of the diameter of the radial blind holes, a graphite block 3 is embedded and bonded in the radial blind holes 2, and the size of the graphite block 3 is matched with the radial blind holes.

Example 2

As shown in fig. 3, 4 and 5, the piston ring with the automatic lubricating function comprises a piston ring body 1 with a diameter of 300mm, a height of 8mm and a thickness of 8mm, wherein two rows of radial blind holes 2 which are arranged in a staggered manner are arranged on a friction surface of the piston ring body, the diameter of each radial blind hole 2 is 1.5mm, the depth of each radial blind hole is 1.8mm, the horizontal arc length of an excircle surface corresponding to two adjacent radial blind holes in the same row is 3.49 times of the diameter of each radial blind hole, a graphite block 3 is embedded and bonded in each radial blind hole 2, and the size of each graphite block 3 is matched with that of each radial blind hole.

The above description is only an example of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Piston ring with self-lubricate function, including the piston ring body, characterized by: the piston ring is characterized in that a plurality of radial blind holes are formed in a friction surface of the piston ring body, the diameter of each radial blind hole is 0.8-2 mm, the depth of each radial blind hole is 1-2 mm, a graphite block is embedded and adhered in each blind hole, and the size of the graphite block is matched with that of each blind hole.

2. The piston ring with self-lubricating function as claimed in claim 1, wherein: the radial blind holes are distributed in rows, and the horizontal arc length of the outer circular surface between two adjacent radial blind holes corresponding to the same row is 2-3.5 times of the diameter of each radial blind hole.

3. The piston ring with self-lubricating function as claimed in claim 2, wherein: the thickness of piston ring body is 3 ~ 5mm, radial blind hole is one row.

4. The piston ring with self-lubricating function as claimed in claim 2, wherein: the thickness of piston ring body is greater than 5mm, radial blind hole is two rows about.

5. The piston ring with self-lubricating function as claimed in claim 4, wherein: when the number of the radial blind holes is two, the two rows of the radial blind holes are arranged in a staggered manner.