CN105041504A - Microstructure self-lubricating oil ring - Google Patents

Abstract

The invention relates to a micro-textured self-lubricating oil ring. An oil groove is formed on the outer peripheral surface of the oil ring body, and the outer circle of the oil groove facing the direction of the combustion chamber has upper and lower ring banks. The upper and lower ring banks are provided with chamfers to reduce the contact area between the piston ring and the cylinder wall; there is a texture on the outer peripheral surface of the oil ring body, which is used to connect the oil storage tank to form a lubricating oil channel; the inner periphery of the oil ring body There is an oil return hole on the surface to prevent oil from accumulating between the two ring banks. The invention well applies the surface texture technology to the friction pair of the piston ring and the cylinder liner, and achieves the self-lubricating effect. When the piston goes down, it can fully scrape off the excess oil on the cylinder wall to prevent oil from entering the combustion chamber; when the piston goes up, it can not only distribute oil evenly, but also store a part of lubricating oil; Self-lubrication is carried out when the oil is exhausted, reducing the friction and wear of the cylinder liner-piston ring, prolonging its life, saving energy and reducing emissions, and improving the working efficiency of the engine.

Description

Micro-textured self-lubricating oil ring

technical field

The invention relates to a piston ring, in particular to a piston ring with self-lubricating function.

Background technique

Piston rings are divided into gas rings and oil rings. The function of the oil ring is to distribute and scrape oil. When the engine is running, the lubricating oil in the oil pan is thrown to the cylinder wall by the parts. When the piston goes up, the oil ring evenly distributes the lubricating oil on the cylinder wall to facilitate lubrication; when the piston goes down, the oil ring scrapes off the excess lubricating oil on the cylinder wall to prevent oil from entering the combustion chamber. There are multiple oil return holes in the concave annular groove around the oil ring, and the oil scraped by the oil ring flows back to the oil pan through the oil return holes. The piston ring has a ring land, which is elastic. When the piston reciprocates, the piston ring fits the cylinder wall. When the piston moves upward, the lower surface of the piston ring contacts the lower surface of the ring groove. When the piston moves downward, the piston ring The upper surface of the plug is in contact with the upper surface of the ring groove, thereby ensuring that the top of the plug and the cylinder form a closed space.

The existing oil ring generally has some problems, such as: the oil distribution is not uniform enough; the oil scraping is not thorough enough; it is easy to wear;

Contents of the invention

The present invention is to provide a micro-textured self-lubricating oil ring with surface micro-texture and self-lubricating function. The oil ring applies the surface texture technology to the friction pair of the piston ring and cylinder liner, which can avoid oil leakage. It is characterized in that it can perform self-lubrication when the engine is running out of fuel, and improve the working efficiency of the engine.

In order to achieve the above object, the technical solution of the present invention is: a micro-textured self-lubricating oil ring, including an oil ring body, an oil groove is opened on the outer peripheral surface of the oil ring body, and a spring groove is provided on the inner peripheral surface, and the oil groove The outer circle facing the direction of the combustion chamber has upper and lower lands, which are characterized in that oil storage tanks are provided in the upper lands and oil tanks, and chamfers are provided on the upper and lower lands to reduce the size of the piston ring. The contact area with the cylinder wall; there is a texture on the outer peripheral surface of the oil ring body, which is used to communicate with the oil storage tank to form a lubricating oil channel, so that the oil in the oil storage tank can self-lubricate the cylinder wall through the lubricating oil channel; the inner circumference of the oil ring body There is an oil return hole on the surface to prevent the oil from accumulating between the two ring banks, and the oil returns to the oil pan through the return hole.

The spring groove is semicircular or V-shaped. The oil return hole is a round hole or a long and narrow hole.

When the piston goes down, the upper surface of the oil groove contacts the upper surface of the piston ring, and the upper and lower lands contact the cylinder wall and scrape off the lubricating oil on the cylinder wall, and the lubricating oil passes through the lower surface of the piston ring and contacts the cylinder wall. The gap between the lower surface of the oil groove enters into the oil groove, when the piston moves upward, the lower surface of the piston ring contacts the lower surface of the oil groove, and the upper surface forms a gap, the lubricating oil in the oil groove is squeezed Under the action of pressure, it flows upward into the oil storage tank.

The beneficial effects of the present invention are:

The invention well applies the surface texture technology to the friction pair of the piston ring and the cylinder liner, and achieves the self-lubricating effect. When the piston goes down, it can fully scrape off the excess oil on the cylinder wall to prevent oil from entering the combustion chamber; when the piston goes up, it can not only distribute oil evenly, but also store a part of lubricating oil; Carry out self-lubrication during oil-poor operation, reduce friction and loss, save energy and reduce emissions, prolong the service life of cylinder liner-piston ring, and improve the working efficiency of the engine.

Description of drawings

Fig. 1 is a three-dimensional partial schematic view of the structure of the present invention;

Fig. 2 is a side view of the structure of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 and 2, a micro-textured self-lubricating oil ring includes an oil ring body 1, an oil groove 2, a spring groove 5, an oil storage groove 3, a texture 6, an oil return hole 7, upper and lower ring banks, etc. .

The outer peripheral surface of the oil ring body 1 is provided with an oil groove 2, and the inner peripheral surface is provided with a spring groove 5. The outer circle of the oil groove 2 facing the direction of the combustion chamber has upper and lower ring banks, and the upper ring bank and the inner side of the oil groove 2 are provided with a storage tank. The oil tank can also only keep the oil storage tank on the upper ring bank. There are chamfers 4 on the upper and lower ring banks to reduce the contact area between the piston ring and the cylinder wall; the outer peripheral surface of the oil ring body 1 has a texture 6 to store lubricating oil, which is connected to the oil storage tank 3 to form a lubricating oil channel. The oil in the oil storage tank 3 self-lubricates the cylinder wall through the lubricating oil channel; the oil return hole is opened on the inner peripheral surface of the oil ring body 1 to prevent the oil from accumulating between the two ring banks, and the oil returns to the cylinder wall through the oil return hole. to the sump. The spring groove 5 is semicircular or V-shaped. The oil return hole 7 is a round hole or a narrow and long hole.

The oil ring body adopts surface texture technology. Surface texture is to process an array of pits or tiny grooves with a certain size and arrangement on the friction surface. It can improve the friction pair by storing abrasive particles and lubricating oil. Frictional properties. In the present invention, it is mainly used as an oil delivery channel.

The upper and lower lands are chamfered in the same direction: the grooved oil ring has two lands on the outer circle facing the combustion chamber, and both lands are chamfered to reduce the contact between the piston ring and the cylinder wall The area increases the contact pressure, so that the oil scraping is more thorough, the oil consumption is reduced, and the amount of oil entering the combustion chamber is reduced.

Design oil storage tank: When the engine is running, the lubricating oil in the oil pan is thrown onto the cylinder wall by the machine parts. When the piston descends, the oil ring scrapes off the excess lubricating oil on the cylinder wall, and a part of the oil can be stored in the oil ring itself. In the oil groove; two oil storage tanks are designed for each oil ring, so that the lubricating oil can be fully stored.

Design texture: the oil ring is designed with a texture. The texture itself can improve the friction characteristics of the friction pair of the piston ring and cylinder liner by storing abrasive particles and lubricating oil, but there is another function here is to form a lubricating oil channel , so that the oil in the oil storage tank lubricates the cylinder wall through the channel, which is the so-called self-lubrication, and ensures uniform lubrication.

Oil return hole design: in order to prevent machine oil from accumulating between the two ring banks, an oil return hole is needed, and the oil return hole is made into a round hole or a narrow and long hole, and the present invention selects the long and narrow hole. The invention adopts the drilling oil ring, which has better breaking strength than the milling oil ring, and improves the safety factor of assembly, especially for the thin oil ring. In addition, the drilled oil ring has a flatter surface profile, which ensures a better oil scraping effect.

When the piston goes down, the upper surface of the oil groove 2 contacts the upper surface of the piston ring, the upper and lower lands contact the cylinder wall and scrape off the lubricating oil on the cylinder wall, and the lubricating oil passes through the lower surface of the piston ring and the oil groove 2 The gap between the lower surfaces enters the oil groove 2. When the piston moves upward, the lower surface of the piston ring contacts the lower surface of the oil groove 2, while the upper surface forms a gap, and the lubricating oil in the oil groove 2 is squeezed Under the effect of, upward flow in the oil storage tank 3.

Technical characteristics of the present invention:

(1) The present invention designs both ring banks to be chamfered so that the oil ring is evenly distributed and the oil is scraped thoroughly;

(2) The present invention designs an oil storage tank on the oil ring itself, which can store lubricating oil;

(3) The present invention designs a texture on the oil ring, and the texture itself can well improve the friction characteristics of the cylinder liner-piston ring friction pair, and it can also be used as an oil passage here;

(4) The present invention enables the oil ring to perform self-lubrication when the engine is running out of oil.

Claims (4)

1. a micro-texture self-lubricating oil ring, comprise oil ring body (1), the outer circumferential face of described oil ring body (1) has oil groove (2), inner peripheral surface is provided with spring groove (5), described oil groove (2) has upper and lower ring bank towards the cylindrical in direction, firing chamber, it is characterized in that: in described pressed on ring bank and in oil groove (2), be provided with oil storage tank (3), described upper and lower ring is provided with chamfering (4) on the bank, for reducing the area of contact of piston ring and cylinder wall; Described oil ring body (1) outer circumferential face has the texture (6) for storing lubricant oil, described texture (6) is communicated with oil storage tank (3), form grease channel, the oil in oil storage tank (3) is lubricated casing wall by grease channel; Described oil ring body (1) inner peripheral surface has spill port (7), and for preventing machine oil to be gathered between two ring banks, machine oil gets back to oil sump by spill port.

2. micro-texture self-lubricating oil ring according to claim 1, is characterized in that: described spring groove (5) semicircular in shape or V-type.

3. micro-texture self-lubricating oil ring according to claim 1, is characterized in that: described spill port (7) is circular hole or long and narrow hole.

4. according to the arbitrary described micro-texture self-lubricating oil ring of claim 1-3, it is characterized in that: when descent of piston, the upper surface of described oil groove (2) contacts with the upper surface of piston ring, on described, lower ring bank contacts with casing wall and is scraped by the lubricant oil on casing wall, lubricant oil enters among described oil groove (2) by the gap between piston ring lower surface and described oil groove (2) lower surface, when piston stroking upward, the lower surface of piston ring contacts with the lower surface of described oil groove (2), and upper surface forms gap, lubricant oil in described oil groove (2) is under the effect of extruding, in up inflow oil storage tank (3).