CN210240531U - Combined piston top land ring, piston assembly and internal combustion engine - Google Patents
Combined piston top land ring, piston assembly and internal combustion engine Download PDFInfo
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- CN210240531U CN210240531U CN201920839020.6U CN201920839020U CN210240531U CN 210240531 U CN210240531 U CN 210240531U CN 201920839020 U CN201920839020 U CN 201920839020U CN 210240531 U CN210240531 U CN 210240531U
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Abstract
A combined piston top land ring, a piston assembly and an internal combustion engine. The combined piston top land ring comprises a first piston ring and a second piston ring which are arranged in a matched mode; the longitudinal section of the first piston ring is in a step shape, and the step surface of the first piston ring is positioned on the inner circumferential side of the first piston ring; the longitudinal section of the second piston ring is in a step shape matched with the longitudinal section of the first piston ring, and the step surface of the second piston ring is positioned on the outer circumference side of the second piston ring; the axial contact surface of the first piston ring and the second piston ring is an inclined contact surface; and a piston top land for reducing the emission is arranged on the outer circumference of the upper end surface of the first piston ring. The piston top land can reduce the height of the piston, so that the clearance volume of the combustion chamber is reduced; when the piston top bank is in working stroke, the gas pressure can quickly act on the upper side surface and the inner side surface, so that the lower side surface of the ring is tightly attached to the lower side surface of the groove, and the outer circular surface of the ring is tightly attached to the cylinder wall, thereby being beneficial to sealing and reducing the discharge amount of tail gas HC.
Description
Technical Field
The utility model relates to a design of internal-combustion engine spare part and manufacturing field, concretely relates to modular piston shore ring, piston assembly and internal-combustion engine.
Background
The piston ring is an important part in the combustion chamber of the internal combustion engine, and is an elastic metal ring which is assembled inside a piston ring groove, forms a seal between the outer circle of a cylinder wall and the surface of the piston ring groove through the elasticity of the elastic metal ring and the pressure of gas in the cylinder, and is a core part of the combustion chamber of the internal combustion engine. The present piston ring mainly has a single type and a combined type. It is usually necessary to install 3-4 piston rings on one piston.
The main functions of the piston ring mainly include four functions of sealing, oil control, heat transfer and support, and the performance, the working reliability, the engine oil consumption rate and the service life of the engine are directly influenced. When the piston works, the piston ring directly bears the impact of high-temperature and high-pressure airflow, and according to reliable data, 60-75% of heat absorbed by the piston group of the engine is radiated by the annular belt part. In the three piston rings, the proportion of the sealing gas of the first ring is about 85%, and 10-20% of oil control work is completed.
The basic principle of the combined piston ring is that the combined ring follows up to compress and release with the piston instantly by utilizing the compression force and explosive force generated in the engine cylinder. The purposes of intercepting, decompressing and slowly releasing between the main ring and the auxiliary ring in the combined ring are achieved, the instant sealing effect is finally achieved, and the instant explosion stroke is guaranteed to be finished. The higher the rotation speed, the shorter the explosion stroke instantaneously, and the smaller the leakage amount.
The existing piston ring design has the following defects:
(1) the existing piston ring mostly has the problem of inevitable air leakage in the operation of a single piston ring. In addition, a straight-through type notch is arranged at a part of the circumference for generating the peripheral tension and expanding when the piston is installed, so that the problem of lap air leakage and the problem of oil leakage are inevitable;
(2) the upper surface and the lower surface of the existing single piston ring are heated differently, so that the ring deformation and the sealing failure are easily caused;
(3) most of the existing combined piston ring patents do not carefully consider the sealing problem at the contact surface of the two rings, so that air flow can leak through a gap at the contact surface of the two rings, and the sealing effect is greatly reduced;
(4) when the piston runs to the upper part of the cylinder sleeve, the piston is difficult to lubricate, so that the resistance is increased, the wear rate of the piston and the cylinder sleeve is increased, and the service life of a piston ring is shortened.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is a primary object of the present invention to provide a combined piston top land ring, piston assembly and internal combustion engine, which at least partially solves at least one of the above technical problems.
In order to achieve the above object, as an aspect of the present invention, there is provided a combined piston shore ring, comprising a first piston ring and a second piston ring which are cooperatively disposed;
the longitudinal section of the first piston ring is in a step shape, and the step surface of the first piston ring is positioned on the inner circumferential side of the first piston ring;
the longitudinal section of the second piston ring is in a step shape matched with the longitudinal section of the first piston ring, and the step surface of the second piston ring is positioned on the outer circumference side of the second piston ring;
the axial contact surface of the first piston ring and the second piston ring is an inclined contact surface;
and a piston top land for reducing the emission is arranged on the outer circumference of the upper end surface of the first piston ring.
As another aspect of the present invention, a piston assembly is provided, wherein the combined piston top land ring is included in the piston assembly.
As still another aspect of the present invention, there is provided an internal combustion engine including the combined piston top land ring.
Based on above-mentioned technical scheme can know, the utility model discloses a combination formula piston shore ring, piston assembly, internal-combustion engine have one of following advantage at least for prior art:
1. the L-shaped upper ring (namely a piston top land) can reduce the height of the piston, thereby reducing the clearance volume of the combustion chamber;
2. the L-shaped upper ring is in a working stroke, the gas pressure can rapidly act on the upper side surface and the inner side surface, so that the lower side surface of the ring is tightly attached to the lower side surface of the groove, and the outer circular surface of the ring is tightly attached to the cylinder wall, thereby being beneficial to sealing and reducing the discharge amount of HC in tail gas;
3. the problem of deformation caused by uneven heating of the upper part and the lower part of the piston ring is solved, and the service life and the sealing effect of the piston ring are improved;
4. compare current combination formula piston ring design, this piston ring has strengthened the connection between two rings from top to bottom, has promoted the leakproofness by a wide margin: the axial connection of the two rings is enhanced through the contact surface of the frosted conical surface, the positive twisting moment of the upper ring (namely the first piston ring) and the elasticity between the two rings, and the air leakage at the joint of the two ring surfaces is reduced; meanwhile, the two rings are positioned simply and are convenient to process;
5. the sealing performance is enhanced because of no straight-through lap, and the combustion gas can be thoroughly blocked, so that the combustion gas cannot enter a crankcase, the power is improved, and the oil consumption is reduced;
6. the temperature of the crankcase can be indirectly reduced, so that the lubricating viscosity of the engine oil is increased, and the lubricating effect is improved;
7. micro particles in combustion products can be prevented from entering a crankcase, the problem of carbon deposition is relieved, and the service life of the engine oil is prolonged;
8. compared with a single piston ring, the utility model has three gas sealing surfaces, and a labyrinth effect exists between the sealing surfaces, so that one piston ring can be used for sealing a plurality of rings;
9. the upper piston ring of the utility model adopts an inner chamfer structure, so that the oil consumption of engine oil is reduced, an extra dynamic behavior is provided for the ring in the working stage, the sealing effect is improved, the friction loss is reduced, and the service life of a combustion chamber component is prolonged;
10. the utility model adopts the upper ring as the eccentric barrel surface structure and the lower ring (namely the second piston ring) as the conical surface structure, thereby improving the oil distribution and scraping capability of the rings, reducing the friction resistance, reducing the consumption of engine oil and reducing the emission;
11. the structure of the utility model has a pressure reduction oil storage cavity between the upper ring and the lower ring and the cylinder sleeve, which can effectively improve the lubrication of the piston ring at the upper stop point, prevent the oil from flowing upwards and reduce the consumption of the lubricating oil; the air leakage and the engine oil consumption are reduced through the oil seal, and the overall performance of the engine is improved;
12. the number of the arranged piston rings can be reduced, and only 2-3 piston rings are arranged on the piston, so that the friction loss and the production cost in the combustion chamber of the engine are reduced; or the sealing performance of the piston ring is greatly improved on the premise of not increasing the number of piston rings.
Drawings
FIG. 1 is a schematic cross-sectional view of a combined piston top land ring and combustion chamber assembly according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view of an assembly of an upper ring and a lower ring of a combined piston top land ring according to an embodiment of the present invention;
fig. 3 is a schematic view of an assembled three-dimensional structure of an upper ring and a lower ring of a combined piston top shore ring in the embodiment of the present invention;
fig. 4 is a schematic perspective view of an upper ring of a combined piston top land ring according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of the upper ring of the combined piston top land ring according to the embodiment of the present invention;
fig. 6 is a schematic perspective view of a lower ring of a combined piston top land ring according to an embodiment of the present invention;
fig. 7 is a schematic sectional view of a lower ring of the combined piston top land ring according to the embodiment of the present invention;
fig. 8 is a schematic structural view of an upper ring lap and a lower ring positioning block of the combined piston top land ring according to the embodiment of the present invention;
fig. 9 is a schematic structural view of the lower ring lap and the upper ring positioning block of the combined piston top land ring according to the embodiment of the present invention.
Description of reference numerals:
1-upper piston ring; 2-a lower piston ring; 3-a piston; 4-cylinder jacket; 5-conical surface matching surface; 6-oil storage chamber; 7-ring groove; 8-upper lap joint; 9-lower lap.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
Because the utility model discloses the position that the product was put can change at will, the utility model discloses in position words such as "upper", "lower", "left", "right", only show relative position relation, and do not be used for injecing absolute position relation.
The utility model mainly solves the inherent air leakage problem existing in the lap joint of the piston ring of the internal combustion engine and the deformation problem caused by uneven heating of the ring surfaces of the upper piston and the lower piston; the sealing effect of multiple rings can be achieved through the two piston rings on the premise of not increasing the number of piston rings, and the sealing performance of the piston rings is greatly improved; and simultaneously, the problems of upward oil channeling and poor lubrication of the upper part of the cylinder sleeve are solved. Compare current combination formula piston ring design, promoted leakproofness by a wide margin: the tight fit is realized through the positive twisting effect of the upper piston ring and the elasticity between the two rings, and a labyrinth effect exists, so that the air leakage at the joint of the two ring surfaces is greatly reduced; meanwhile, the two rings are positioned simply and are convenient to process.
The piston ring can improve the dynamic property of an internal combustion engine, reduce HC emission indexes and the consumption rate of lubricating oil, enhance the heat dissipation effect, reduce the wear rate of the piston ring and prolong the service life of the ring. In particular, cold start performance and idling performance of the engine are improved. The number of the piston rings can be reduced, or the sealing performance of the piston rings is greatly improved on the premise of not increasing the number of the piston rings.
Specifically, the utility model discloses a combined piston shore ring, which comprises a first piston ring and a second piston ring which are arranged in a matching way;
the longitudinal section of the first piston ring is in a step shape, and the step surface of the first piston ring is positioned on the inner circumferential side of the first piston ring;
the longitudinal section of the second piston ring is in a step shape matched with the longitudinal section of the first piston ring, and the step surface of the second piston ring is positioned on the outer circumference side of the second piston ring;
the axial contact surface of the first piston ring and the second piston ring is an inclined contact surface;
and a piston top land for reducing the emission is arranged on the outer circumference of the upper end surface of the first piston ring.
Wherein the first piston ring is an L-shaped cylindrical ring;
wherein the height of the piston top land is greater than the piston groove for installing a piston ring;
the outer circle of the piston top land is an inner inclined conical surface;
wherein, the taper of the outer circle inner inclined conical surface of the piston top land is 15-75 degrees, for example, 45 degrees.
Wherein, the top of the inner circle surface of the first piston ring is provided with a ring groove;
wherein the coefficient of thermal expansion of the first piston ring is less than the coefficient of thermal expansion of the second piston ring.
Wherein, the lower ring surface of the inner circumference of the first piston ring is an inner inclined conical surface, and the upper ring surface of the outer circumference of the first piston ring is a barrel surface;
the outer circumference upper ring surface of the second piston ring is an outward inclined conical surface, and the outer circumference lower ring surface of the second piston ring is an inward inclined conical surface;
the conicity of the inner inclined conical surface and the conicity of the outer inclined conical surface are both 15-75 degrees, such as 45 degrees, and the conicity of the inner inclined conical surface and the conicity of the outer inclined conical surface are complementary angles;
wherein the surface of the conical surface is subjected to sanding treatment;
and the outer circles of the first piston ring and the second piston ring are provided with oil storage cavities in the circumferential direction together with the cylinder sleeve during assembly.
Wherein the first piston ring is located above the second piston ring.
The first piston ring is provided with a first lap opening, and the second piston ring is provided with a second limiting block corresponding to the first lap opening;
a second lap opening is formed in the second piston ring, and a first limiting block is arranged on the first piston ring and corresponds to the second lap opening;
wherein the included angle between the first lap opening and the second lap opening is 180 degrees;
wherein, the first piston ring is in a positive twist reverse step shape;
wherein, the second piston ring is in a negative twist reverse step shape.
The radial width and the axial height of the first piston ring stepped surface and the lower piston ring stepped surface are equal;
wherein the barrel surface axis of the first piston ring is below the central axis;
wherein, the radial width of the lower end surface of the contact surface of the first piston ring is half of the radial width of the upper end surface of the first piston ring;
wherein, the radial width of the upper end surface of the contact surface of the second piston ring is half of the radial width of the lower end surface of the second piston ring;
wherein the axial height of the lower section of the stepped contact surface of the first piston ring is one half of that of the upper section;
wherein the axial height of the lower section of the stepped contact surface of the second piston ring is one half of the axial height of the upper section.
The utility model also discloses a piston assembly, contain in the piston assembly combination formula piston top bank ring.
The utility model also discloses an internal-combustion engine, include in the internal-combustion engine combination formula piston shore ring.
In an embodiment of the present invention, for example, the following technical solutions are adopted:
the utility model discloses a combination formula piston top bank ring design suitable for internal-combustion engine piston ring top bank ring. Specifically, an upper piston ring (i.e., a first piston ring) and a lower piston ring (i.e., a second piston ring) are included. The method is characterized in that: the upper piston ring is a positive-twist L-shaped eccentric barrel surface ring, and the section of the upper piston ring is in an inverted step shape; the lower piston ring is a conical surface ring, and the section of the lower piston ring is a positive step shape; the piston ring assembly body does not have a straight-through lap opening in the axial direction; the upper piston ring and the lower piston ring can also be made of different materials according to different requirements.
In another embodiment of the present invention, the present invention adopts, for example, the following technical solutions: the utility model discloses a combined piston shore ring suitable for an internal combustion engine, which comprises an upper piston ring and a lower piston ring, wherein the upper piston ring and the lower piston ring are axially fixed and movably connected by matching of two-ring elasticity and a stop structure; the upper piston ring is provided with a first limiting block, the lower piston ring is also provided with a second limiting block, and the limiting blocks (namely the first limiting block and the second limiting block) of the two piston rings are matched with the lapping opening (namely the second lapping opening and the first lapping opening) of the opposite side ring to form circumferential fixation.
Wherein, the upper piston ring is a positive twist ring, and the upper end surface of the inner circle is provided with a step-shaped ring groove; the section is of an inverted ladder shape, and the outer circular surface is of an L-shaped structure of an eccentric barrel surface.
The section of the lower piston ring is of a step type, and the outer circular surface of the lower piston ring is of a conical surface structure.
Wherein, the opening parts of the upper piston ring and the lower piston ring are kept staggered and form an angle of 180 degrees.
The contact surface of the upper piston ring and the lower piston ring is a conical surface with the taper and the complementary fit degree, and the surface of the contact surface is frosted.
In another embodiment of the present invention, for example, the following technical solutions are adopted:
an object of the utility model is to provide a piston top bank ring with high leakproofness, long service life, have good frizing oil distribution ability concurrently simultaneously, can realize the high seal of combustion chamber in the cylinder, reduce tail gas HC and discharge, solve the engine power decline, machine oil consumption is high, the lubricated difficult problem in cylinder jacket upper portion, improve the life of piston ring, reduce the pollution of the interior gas of cylinder to machine oil and the wear rate of internals simultaneously, prolong the life of machine oil and part, improve the overall reliability and the working life of internal-combustion engine.
In order to realize the technical effect, the utility model discloses a biplate combination formula piston top shore ring designs into two formula structures of upper and lower piston ring complex.
The combined structure of the upper piston ring and the lower piston ring: the contact surfaces of the two piston rings are mutually matched oblique contact surfaces, the section of the main body of the upper piston ring is in an inverted step shape, the outer ring surface is a barrel surface, the upper section of the inner circular surface is provided with a groove in a top ring mode, and the lower section of the inner circular surface is an inner inclined conical surface with the angle of 15-75 degrees, preferably 45 degrees; the section of the main body of the lower piston ring is of an upright stepped type, the stepped upper section of the outer circular surface is an outward inclined conical surface which is matched with the inner circular surface of the upper piston ring in a complementary way and has the taper of 15-75 degrees, preferably 45 degrees, and the stepped lower section is a barrel surface; the excircle of the two piston rings and the cylinder sleeve form a cavity (namely an oil storage cavity) in the circumferential direction, so that the oil scraping effect from the upper part of the cylinder sleeve in the descending process of the piston can be stored, and the oil distribution in the ascending process of the piston is also facilitated, thereby playing the roles of lubrication and sealing. The two piston rings are matched with the ring lap opening at the opposite side by adopting a limiting block on the ring.
The upper piston ring and the lower piston ring are tightly attached to the conical matching surface through the elasticity of the rings, a through opening is not formed, and meanwhile, a labyrinth effect is formed through multi-layer sealing of the stepped contact surface, so that the sealing effect is enhanced;
wherein, the contact surfaces of the upper piston ring and the lower piston ring are subjected to surface sanding treatment so as to ensure the close axial connection of the two piston rings in the working process;
the upper piston ring is an L-shaped ring, an L-shaped arm of the upper piston ring is higher than a piston ring groove, and the L-shaped arm is flush with the top of the piston in a power stroke; wherein, the contact surfaces of the upper piston ring and the lower piston ring are mutually tapered at 15-75 degrees, preferably at 45 degrees, and meanwhile, the surface is frosted to ensure the close connection of the two piston rings in the working process;
wherein, the excircle surface of the upper ring is an eccentric barrel surface structure, and the axis of the barrel surface is below the central axis;
wherein, the radial widths of the step-shaped contact surfaces of the upper piston ring and the lower piston ring are equal;
wherein the axial heights of the stepped contact surfaces of the upper and lower piston rings are equal.
Wherein the stepped axial heights of the lower piston rings are equal;
wherein the first lap opening of the upper piston ring and the second lap opening of the lower piston ring are arranged in a staggered manner by 180 degrees;
wherein, the upper piston ring material needs to be surface treated, and the upper and lower piston rings can also be selected from different materials according to different requirements.
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1-9, the present invention can be implemented as follows, a combined piston ring assembly comprises an upper piston ring 1 and a lower piston ring 2 mounted on a piston 3, the outside of the piston 3 is a cylinder sleeve 4, the upper piston ring 1 is provided with an upper lap 8, the lower piston ring 2 is provided with a lower lap 9, and the upper lap 8 and the lower lap 9 are assembled in a staggered manner; the section of the upper piston ring 1 is of an inverted step shape, and the step surface is positioned on the inner circumferential side of the upper piston ring 1; the section of the lower piston ring 2 is in a positive stepped shape, and the stepped surface is positioned on the outer circumferential side of the lower piston ring 2; the step surface of the upper piston ring 1 is matched with the step surface of the lower piston ring 2, and the complete combined piston ring is assembled and combined.
The surface of the upper piston ring 1 needs to be treated, and if the upper piston ring and the lower piston ring are made of different materials, the thermal expansion coefficient α 1 selected by the material of the upper piston ring 1 is smaller than the thermal expansion coefficient α 2 selected by the material of the lower piston ring.
The inverted stepped contact surface of the upper piston ring 1 comprises an upper end surface of the upper piston ring 1 and a lower end surface of the upper piston ring 1, and the stepped contact surface of the lower piston ring 2 comprises an upper end surface of the lower piston ring 2 and a lower end surface of the lower piston ring 2.
The distance between the upper end surface of the step-shaped contact surface of the upper piston ring 1 and the lower end surface of the step-shaped contact surface of the upper piston ring 1 is equal to the distance between the upper end surface of the step-shaped contact surface of the upper piston ring 1 and the ring top of the upper piston ring 1; the radial width of the lower end face of the contact surface of the upper piston ring 1 is half of the radial width of the upper end face of the upper piston ring 1. In a mirror image mode, the distance between the upper end surface of the stepped contact surface of the lower piston ring 2 and the lower end surface of the stepped contact surface of the upper piston ring 1 is equal to the distance between the lower end surface of the stepped contact surface of the lower piston ring 2 and the ring bottom of the lower piston ring 2; the radial width of the upper end surface of the contact surface of the lower piston ring 2 is half of the radial width of the lower end surface of the lower piston ring 2.
The upper piston ring 1 is assembled on the stepped surface of the lower piston ring 2, and the upper end surface of the stepped contact surface of the lower piston ring 2 is coincided with the upper end surface of the step of the upper piston ring 1.
The conical surface matching surface 5 is a conical surface with an angle of 15-75 degrees, preferably 45 degrees, and the surface of the conical surface is frosted. The upper piston ring and the lower piston ring are axially and tightly connected through the frosted conical surface matching surface 5 and the elasticity of the two rings, namely the upper piston ring 1 and the lower piston ring 2.
The step surface on the upper piston ring 1 is provided with a limiting block at the opposite side of the lap opening along the radial direction, and the step of the lower piston ring 2 at the opposite side of the lap opening of the step-shaped outer circle surface is provided with a limiting block matched with the lap opening of the upper piston ring 1. The limiting blocks are respectively assembled into the lapping openings of the opposite side rings and used for limiting the relative rotation between the upper piston ring 1 and the lower piston ring 2 so as to keep the opening of the upper piston ring 1 and the lapping opening of the lower piston ring 2 to be assembled in the piston 3 in a state of being staggered by 180 degrees.
Wherein, the top of the inner circle surface of the upper piston ring 1 is provided with a ring groove 7, so that the whole ring generates positive distortion effect, only the lower edge of the outer circle surface is contacted with the cylinder wall in the working period without air pressure load, and the lower edge of the inner circle surface is respectively contacted with the upper and lower stepped surfaces of the lower piston ring.
Wherein, the lower excircle face of echelonment of lower piston ring 2 is the conical surface, forms a step-down oil storage chamber with the cylinder liner between.
Wherein, the upper piston ring 1 is an L-shaped ring, the L-shaped arm of the upper piston ring is higher than the piston ring groove, and the L-shaped arm is flush with the piston top in the power stroke; the above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A combined piston top land ring comprises a first piston ring and a second piston ring which are arranged in a matched mode;
the longitudinal section of the first piston ring is in a step shape, and the step surface of the first piston ring is positioned on the inner circumferential side of the first piston ring;
the longitudinal section of the second piston ring is in a step shape matched with the longitudinal section of the first piston ring, and the step surface of the second piston ring is positioned on the outer circumference side of the second piston ring;
the axial contact surface of the first piston ring and the second piston ring is an inclined contact surface;
and a piston top land for reducing the emission is arranged on the outer circumference of the upper end surface of the first piston ring.
2. The modular piston top land ring of claim 1 wherein:
the first piston ring is an L-shaped cylindrical ring;
the height of the piston top land is greater than that of a piston groove for mounting a piston ring;
the excircle of the piston top land is an inward-inclined conical surface;
the taper of the excircle inward-inclined conical surface of the piston top land is 15-75 degrees;
the taper of the excircle inward-inclined conical surface of the piston top land is 45 degrees.
3. The modular piston top land ring of claim 1 wherein:
a ring groove is formed in the top of the inner circular surface of the first piston ring;
the first piston ring has a coefficient of thermal expansion that is less than a coefficient of thermal expansion of the second piston ring.
4. The modular piston top land ring of claim 1 wherein:
the lower ring surface of the inner circumference of the first piston ring is an inner inclined conical surface, and the upper ring surface of the outer circumference of the first piston ring is a barrel surface;
the outer circumference upper ring surface of the second piston ring is an outward inclined conical surface, and the outer circumference lower ring surface of the second piston ring is an inward inclined conical surface;
the conicity of the inner inclined conical surface and the conicity of the outer inclined conical surface are both 15-75 degrees, and the conicity of the inner inclined conical surface and the conicity of the outer inclined conical surface are complementary angles;
the conicity of the inner inclined conical surface and the conicity of the outer inclined conical surface are both 45 degrees;
the surface of the conical surface is subjected to frosting treatment;
and the outer circles of the first piston ring and the second piston ring are provided with oil storage cavities in the circumferential direction together with the cylinder sleeve during assembly.
5. The modular piston top land ring of claim 1 wherein:
the first piston ring is located above the second piston ring.
6. The modular piston top land ring of claim 1 wherein:
a first lap opening is formed in the first piston ring, and a second limiting block is arranged on the second piston ring and corresponds to the first lap opening;
a second lap opening is formed in the second piston ring, and a first limiting block is arranged on the first piston ring and corresponds to the second lap opening;
the included angle between the first lap opening and the second lap opening is 180 degrees.
7. The modular piston top land ring of claim 1 wherein:
the first piston ring is in a positive twist inverted step shape;
the second piston ring is in a negative twist inverted step shape.
8. The modular piston top land ring of claim 1 wherein:
the radial width and the axial height of the first piston ring step surface and the lower piston ring step surface are equal;
the barrel surface axis of the first piston ring is below the central axis;
the radial width of the lower end face of the contact surface of the first piston ring is one half of the radial width of the upper end face of the first piston ring;
the radial width of the upper end surface of the contact surface of the second piston ring is one half of the radial width of the lower end surface of the second piston ring;
the axial height of the lower section of the stepped contact surface of the first piston ring is one half of that of the upper section;
the axial height of the lower section of the step-shaped contact surface of the second piston ring is half of that of the upper section.
9. A piston assembly comprising a modular piston top land ring according to any one of claims 1 to 8.
10. An internal combustion engine comprising a modular piston top land ring according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920839020.6U CN210240531U (en) | 2019-06-03 | 2019-06-03 | Combined piston top land ring, piston assembly and internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920839020.6U CN210240531U (en) | 2019-06-03 | 2019-06-03 | Combined piston top land ring, piston assembly and internal combustion engine |
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| Publication Number | Publication Date |
|---|---|
| CN210240531U true CN210240531U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920839020.6U Expired - Fee Related CN210240531U (en) | 2019-06-03 | 2019-06-03 | Combined piston top land ring, piston assembly and internal combustion engine |
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| CN (1) | CN210240531U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145598A (en) * | 2019-06-03 | 2019-08-20 | 天津大学 | Built-up piston top bank ring, piston assembly, internal combustion engine and encapsulating method |
| WO2021259116A1 (en) * | 2020-06-22 | 2021-12-30 | 东莞宏大动力科技有限公司 | Seamless seal piston |
-
2019
- 2019-06-03 CN CN201920839020.6U patent/CN210240531U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145598A (en) * | 2019-06-03 | 2019-08-20 | 天津大学 | Built-up piston top bank ring, piston assembly, internal combustion engine and encapsulating method |
| CN110145598B (en) * | 2019-06-03 | 2024-02-09 | 天津大学 | Combined piston top land ring, piston assembly, internal combustion engine and sealing method |
| WO2021259116A1 (en) * | 2020-06-22 | 2021-12-30 | 东莞宏大动力科技有限公司 | Seamless seal piston |
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