CN210087493U - Piston ring structure - Google Patents

Abstract

The utility model provides a piston ring structure belongs to mechanical technical field. It has solved the easy oil pumping of current piston ring structure and has caused the big problem of machine oil consumption. The piston ring structure comprises an annular piston ring body, wherein the piston ring body comprises an inner edge section close to an inner ring, an outer edge section close to an outer ring and a transition section which is connected with the inner edge section and the outer edge section, and the outer edge section is located above the inner edge section along the direction of the central axis of the piston ring body. The piston ring structure can eliminate the oil pumping effect and reduce the oil consumption.

Description

Piston ring structure

Technical Field

The utility model belongs to the technical field of machinery, a piston ring structure is related to.

Background

With conventional piston rings, when the piston moves up and down, the piston ring moves up and down in the ring groove. When the piston is in the suction stroke, the piston moves downwards, and the gas pressure in the cylinder is smaller. The piston ring is caused to float and cling to the upper part of the piston ring groove under the action of the friction force between the piston ring and the cylinder wall and the pressure difference between the gas in the cylinder and the gas in the crankcase. At the moment, the piston ring continuously scrapes off the engine oil attached to the wall of the cylinder, and the scraped engine oil can enter the ring groove. When the piston is in the compression stroke, the piston moves upwards, and the gas pressure in the cylinder is larger. The piston ring is tightly attached to the lower part of the ring groove under the action of the friction force between the piston ring and the cylinder wall and the pressure difference between the gas in the cylinder and the gas in the crankcase, and at the moment, the engine oil in the ring groove is extruded into the combustion chamber. By repeating the above steps, the engine oil is continuously pumped into the combustion chamber and is finally burnt. Therefore, the oil consumption is overlarge, the emission pollutants are increased and even exceed the standard, and the engine knocks and even pre-ignites. The engine oil pressure alarm is caused by the too fast consumption of the engine oil due to the too large consumption of the engine oil for a long time, and the use experience of customers is influenced.

Compared with the prior art, the oil drainage hole is additionally arranged on the piston ring, and oil scraped by the piston ring is led out in time so as to reduce the engine oil consumption of the piston ring. However, the oil drain hole is increased, and only the engine oil consumption can be passively reduced, and the problem of oil pumping of the piston cannot be solved.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a piston ring structure, the utility model aims to solve the technical problem that: how to eliminate the oil pumping effect and reduce the oil consumption.

The purpose of the utility model can be realized by the following technical proposal: the piston ring structure comprises an annular piston ring body, wherein the piston ring body comprises an inner edge section close to an inner ring, an outer edge section close to an outer ring and a transition section which connects the inner edge section and the outer edge section, and a height difference exists between the outer edge section and the inner edge section along the direction of the central axis of the piston ring body.

The piston ring structure is used in an engine and matched with a piston, and is sleeved in a ring groove on the piston when in use. When the piston moves up and down, the piston ring body also moves up and down in the ring groove. When the piston is in the stroke of breathing in, the piston descends, and gas pressure is less in the cylinder, because the outer edge section of this piston ring body is located the top of interior edge section for this piston ring body wholly forms zigzag structure, and the piston ring body can take place the slope under the combined action of the frictional force of piston ring body and cylinder wall and the gaseous pressure difference of gas and crankcase in the cylinder, thereby all contacts with the upper and lower surface of annular, and the contact of lower surface makes machine oil can not get into the annular. When the piston is in a compression stroke, the piston moves upwards, the gas pressure in the cylinder is high, the piston ring body can be tightly attached to the lower portion of the ring groove under the friction force between the piston ring body and the cylinder wall and the action of the gas pressure difference between the gas in the cylinder and the crankcase, and engine oil between the piston ring body and the ring groove can be extruded out of the ring groove and enters the crankcase, so that the phenomenon that the piston ring pumps oil is avoided, and the engine oil consumption of the piston assembly is reduced. In addition, because the structure of the zigzag of piston ring body for the piston ring body hugs closely in the ring groove bottom no matter under which kind of stroke, thereby can effectively reduce the emergence that the piston ring trembled, also can effectively reduce piston ring motion noise, and still have the clearance because between piston ring and the annular, so can not cause the dead phenomenon of piston ring card, owing to the reduction of machine oil consumption even, can make the annular cleanliness higher, reduce the dead possibility of piston ring card.

In the above-mentioned piston ring structure, the piston ring body is provided with a notch. The notch is arranged, so that the installation is more convenient.

In the above-mentioned piston ring structure, along the section of the central axis direction of the piston ring body, two boundary lines formed by the inner edge section, the transition section and the outer edge section are all wave-shaped. The piston body can also be made into the wave type, can eliminate the pump oil effect, reduce the machine oil consumption, and the piston ring body hugs closely in the ring groove bottom under no matter what kind of stroke, thereby can effectively reduce the emergence that the piston ring trembled, also can effectively reduce piston ring motion noise, because still have the clearance between piston ring body and the annular, so can not cause the dead phenomenon of card, because the reduction of machine oil consumption even, can make the annular cleanliness higher, reduce the dead possibility of piston ring card.

In the above-mentioned piston ring structure, along the section of the central axis direction of the piston ring body, two boundary lines formed by the inner edge section, the transition section and the outer edge section are all in an S shape. And the S-shaped structure is designed, so that the processing is convenient. Simultaneously the setting of this structure can eliminate the pump oil effect, reduces the machine oil consumption, and the piston ring body all hugs closely in the ring groove bottom no matter under which kind of stroke to can effectively reduce the emergence that the piston ring trembles, also can effectively reduce piston ring motion noise, because still have the clearance between piston ring body and the annular, so can not cause the dead phenomenon of card, owing to the reduction of machine oil consumption even, can make the annular cleanliness higher, reduce the dead possibility of piston ring card.

In the above-mentioned piston ring structure, along the central axis direction cross-section of the piston ring body, two boundary lines formed by the inner edge section, the transition section and the outer edge section are all in a Z-shape. The Z-shaped structure design is convenient for processing. Simultaneously the setting of this structure can eliminate the pump oil effect, reduces the machine oil consumption, and the piston ring body all hugs closely in the ring groove bottom no matter under which kind of stroke to can effectively reduce the emergence that the piston ring trembles, also can effectively reduce piston ring motion noise, because still have the clearance between piston ring body and the annular, so can not cause the dead phenomenon of card, owing to the reduction of machine oil consumption even, can make the annular cleanliness higher, reduce the dead possibility of piston ring card.

In the piston ring structure, the thickness of the piston ring body is 0.6-2 mm, and the height difference between the inner edge section and the outer edge section is 1.2-4 mm. Because the curved surface structural design of this application piston ring body, under the prerequisite that does not increase or even lighten weight, can make the thickness of piston ring body slightly be less than traditional piston ring, but the distance of the peak of piston ring body and minimum still increases, can increase the mist and to the radial thrust of piston ring, makes the gas tightness better, and the frizing effect is also better. Meanwhile, as the air tightness is improved, the elasticity of the piston ring can be correspondingly reduced, the friction work is reduced, the fuel consumption is reduced, and the economy is improved.

Compared with the prior art, the piston ring structure has the following advantages:

1. the oil pumping effect can be effectively eliminated, and the oil consumption is reduced.

2. Can effectively reduce the emergence that the piston ring trembled, also can effectively reduce piston ring motion noise, also can not cause the dead phenomenon of piston ring card simultaneously, even because the reduction of machine oil consumption, can make the annular cleanliness higher, reduce the dead possibility of piston ring card.

3. Can alleviate the weight of piston ring, improve the followability of piston ring, increase the mist to the radial thrust of piston ring, make the gas tightness better, the frizing effect is also better, simultaneously because the gas tightness becomes good, can correspondingly reduce the elasticity of piston ring, reduce the friction work, reduce fuel consumption, improve economic nature.

Drawings

FIG. 1 is a perspective view of the present piston ring structure in accordance with a first embodiment.

Fig. 2 is a sectional structural view of the piston ring structure in the first embodiment in an intake stroke.

Fig. 3 is a sectional structural view of the present piston ring structure in a compression stroke according to the first embodiment.

In the figure, 1, a piston ring body; 1a, a gap; 1b, an inner edge section; 1 c. A transition section; 1d, an outer edge section; 2. a piston; 2a, a ring groove; 3. a cylinder wall.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, the piston ring structure includes an annular piston ring body 1, a gap 1a is opened on the piston ring body 1, the piston ring body 1 can be conveniently installed and sleeved in a ring groove 2a of a piston 2 by the gap 1a, and a gap is formed between the piston ring body 1 and the piston 2. The piston ring body 1 comprises an inner edge section 1b close to the inner ring, an outer edge section 1d close to the outer ring and a transition section 1c connecting the inner edge section 1b and the outer edge section 1d, and the outer edge section 1d has a height difference between the inner edge section 1b and the outer edge section 1d along the direction of the central axis. In this embodiment, along the central axis direction cross section of the piston ring body 1, the upper and lower boundary lines of the cross sections of the inner edge section 1b, the transition section 1c and the outer edge section 1d are all in a zigzag shape, and the bent portions are all in arc transition.

When the piston 2 is in the suction stroke, the piston 2 moves downwards, the gas pressure in the cylinder is smaller, and due to the zigzag structure action of the piston ring body 1, the piston ring body 1 can incline under the combined action of the friction force between the piston ring body 1 and the cylinder wall 3 and the pressure difference between the gas in the cylinder and the gas in the crankcase, so that the piston ring body is contacted with the upper surface and the lower surface of the ring groove 2a, and the contact of the lower surface prevents engine oil from entering the ring groove 2a, as shown in fig. 2. When the piston 2 is in a compression stroke, the piston 2 moves upwards, the gas pressure in the cylinder is larger, the piston ring body 1 is tightly attached to the lower part of the ring groove 2a under the action of the friction force between the piston ring body 1 and the cylinder wall 3 and the gas pressure difference between the gas in the cylinder and the crankcase, and the engine oil between the piston ring body 1 and the ring groove 2a is extruded out of the ring groove 2a and enters the crankcase, so that the phenomenon of pumping oil by the piston ring is avoided, and the engine oil consumption of the piston 2 assembly is reduced, as shown in fig. 3. Moreover, because the zigzag structural design of piston ring body 1 for piston ring body 1 hugs closely in annular 2a bottom no matter under what kind of stroke, thereby can effectively reduce the emergence that the piston ring trembled, also can effectively reduce piston ring motion noise, and still have the clearance because between piston ring and the annular 2a, so can not cause the dead phenomenon of piston ring card, because the reduction of machine oil consumption even can make annular 2a cleanliness higher, reduce the dead possibility of piston ring card.

Furthermore, the thickness of the piston ring body 1 is 0.6-2 mm, the height difference between the inner edge section 1b and the outer edge section 1d is 1.2-4 mm, namely, compared with the traditional piston ring structure, the piston ring body 1 can enable the thickness of the piston ring body 1 to be slightly lower than that of the traditional piston ring on the premise of not increasing or even lightening the weight, the distance between the highest point and the lowest point of the piston ring body 1 can be ensured to be increased, and therefore the radial thrust of mixed gas to the piston ring can be increased, the air tightness is better, and the oil scraping effect is better. Meanwhile, as the air tightness is improved, the elasticity of the piston ring can be correspondingly reduced, the friction work is reduced, the fuel consumption is reduced, and the economy is improved.

Example two

The structure of the present embodiment is substantially the same as that of the first embodiment, except that: the upper and lower boundary lines formed by the inner edge section 1b, the transition section 1c and the outer edge section 1d are S-shaped along the section of the piston ring body 1 along the central axis direction.

EXAMPLE III

The structure of the present embodiment is substantially the same as that of the first embodiment, except that: the upper and lower boundary lines formed by the inner edge section 1b, the transition section 1c and the outer edge section 1d are all wave-shaped along the section of the piston ring body 1 in the central axis direction.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (6)

1. A piston ring structure comprises an annular piston ring body (1), and is characterized in that the piston ring body (1) comprises an inner edge section (1b) close to an inner ring, an outer edge section (1d) close to an outer ring and a transition section (1c) connecting the inner edge section (1b) and the outer edge section (1d), and a height difference exists between the outer edge section (1d) and the inner edge section (1b) along the direction of a central axis of the piston ring body (1).

2. The piston ring structure as claimed in claim 1, characterized in that, in a cross section taken along a central axis of the piston ring body (1), both boundary lines formed by the inner edge section (1b), the transition section (1c) and the outer edge section (1d) are wave-shaped.

3. The piston ring structure as claimed in claim 2, characterized in that, in a cross section taken along the central axis of the piston ring body (1), the two boundary lines formed by the inner edge section (1b), the transition section (1c) and the outer edge section (1d) are S-shaped.

4. The piston ring structure as claimed in claim 1, characterized in that, in a cross section taken along a central axis of the piston ring body (1), two boundary lines formed by the inner edge section (1b), the transition section (1c) and the outer edge section (1d) are Z-shaped.

5. The piston ring structure as claimed in claim 1 or 2 or 3 or 4, wherein the thickness of the piston ring body (1) is 0.6-2 mm, and the height difference between the inner edge section (1b) and the outer edge section (1d) is 1.2-4 mm.

6. Piston ring structure according to claim 1 or 2 or 3 or 4, characterized in that the piston ring body (1) is provided with a gap (1 a).

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