CN220869529U - Piston ring set of heavy diesel engine for vehicle - Google Patents
Piston ring set of heavy diesel engine for vehicle Download PDFInfo
- Publication number
- CN220869529U CN220869529U CN202322931558.9U CN202322931558U CN220869529U CN 220869529 U CN220869529 U CN 220869529U CN 202322931558 U CN202322931558 U CN 202322931558U CN 220869529 U CN220869529 U CN 220869529U
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- Prior art keywords
- ring
- gas
- oil
- diesel engine
- gas ring
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- 238000000576 coating method Methods 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000007790 scraping Methods 0.000 claims description 16
- 238000005121 nitriding Methods 0.000 claims description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 239000011651 chromium Substances 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 42
- 239000010705 motor oil Substances 0.000 abstract description 9
- 230000001788 irregular Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 31
- 239000010410 layer Substances 0.000 description 22
- 239000000463 material Substances 0.000 description 7
- 238000007747 plating Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 102100032912 CD44 antigen Human genes 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 101000868273 Homo sapiens CD44 antigen Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a piston ring set of a heavy-duty diesel engine for a vehicle, which comprises a top ring, a second gas ring and a combined oil ring; the second gas ring is arranged below the top ring, and the combined oil ring is arranged below the second gas ring; the outer circular surface of the top ring is provided with an irregular barrel surface outline, and DLC coating is applied to the outer circular surface after the whole top ring is nitrided; the outer circle of the second gas ring is provided with a nose-shaped step, the inner circle is provided with a chamfer or a cutting table, and the outer circle surface of the second gas ring is semi-embedded with an electroplated layer; the combined oil ring comprises an oil ring body and a spiral supporting spring arranged in an inner circular groove, wherein 72 circular oil return holes are formed in the oil ring body, and the shape of the inner circular groove is V-shaped. The piston ring set provided by the utility model can meet the long-life requirement of a diesel engine, has stable engine oil consumption control and can be produced in batches.
Description
Technical Field
The utility model relates to the field of piston rings of internal combustion engines, in particular to a piston ring set of a heavy-duty diesel engine for vehicles.
Background
The piston ring has four functions in the internal combustion engine, namely, sealing high-pressure fuel gas, scraping excessive engine oil, supporting the movement of a piston and leading out heat. For heavy-duty diesel engines for vehicles, national 6 emission standards have been fully implemented in China, but besides the control of pollutant tail gas emission, requirements including improvement of combustion efficiency, prolongation of service life of B10, prolongation of engine oil replacement period, weight reduction, reduction of friction power consumption, reduction of fuel consumption, reduction of carbon dioxide emission and the like are continuously improved, and obviously, the requirements directly or indirectly put forward higher requirements on the functions of a piston ring assembly.
The existing piston ring set of the heavy-duty diesel engine for the vehicle adopts some new technologies in the aspects of materials, structures, coatings and the like, but some defects of the existing piston ring set are found, and the problems of unstable engine oil consumption control, abrasion of a cylinder, larger abrasion loss and the like exist. For example, after the burst pressure of the whole machine is further increased, the highest burst pressure reaches more than 250bar, and some of the burst pressure reaches more than 270bar, so that the cylinder deformation and lubrication between friction pairs at high temperature and high pressure become worse, and the problems of engine oil consumption and abrasion become prominent; for example, the problems of piston ring abrasion and cylinder pulling are also exhibited by using low-viscosity engine oil to further reduce friction power consumption and reduce the reticulation depth of the inner hole of the cylinder, and the problems restrict the development of the whole machine to a certain extent.
Disclosure of utility model
The utility model aims to: the utility model provides a piston ring group of a heavy-duty diesel engine for a vehicle, which can slow down the abrasion of a piston ring and reduce the friction power consumption.
The technical scheme is as follows: the utility model provides a piston ring set of a heavy-duty diesel engine for a vehicle, which comprises a top ring, a second gas ring and a combined oil ring; the second gas ring is arranged below the top ring, and the combined oil ring is arranged below the second gas ring; the top ring is of a trapezoid cross section; the second gas ring is rectangular in cross section, a chamfer or a cutting table is arranged in the inner circle of the second gas ring, and the outer circular surface of the second gas ring comprises an annular contact platform and a conical surface which is inclined inwards from the top of the contact platform; the combined oil ring comprises an oil ring body, wherein an inner circular groove is formed in the inner circular surface of the oil ring body, and a spiral supporting spring is arranged in the inner circular groove.
Preferably, the hardness of the top ring nitriding layer is larger than 700HV0.1, the depths of the nitriding layers of the upper end face and the lower end face are larger than 0.01mm, the depths of the nitriding layers of the outer circular surface are 0.03-0.08 mm, and the thicknesses of the DLC coating layers of the outer circular surface are 0.01-0.025 mm.
Preferably, the electroplated layer of the second gas ring is a chromium layer or a chromium and ceramic particle composite plated layer, and the thickness of the plated layer is 0.06-0.15 mm.
Preferably, the combined oil ring further comprises an oil scraping belt, wherein the outer circle of the oil scraping belt is provided with a chromium and diamond particle composite coating, the thickness is more than 0.08mm, the hardness is 900-1200HV0.1, the outer layer is provided with a DLC coating, the thickness is 0.005-0.01 mm, and the hardness is 1800-3000HV0.025.
Preferably, the outer circle of the oil scraping belt is provided with an annular contact platform and a conical surface which inclines inwards from the top of the contact platform.
Preferably, the top ring is 2.5mm or 3.0mm in height, the second gas ring is 2.0mm or 2.5mm in height, and the combined oil ring is 3.0mm or 3.5mm in height.
Preferably, the outer circle of the second gas ring is further provided with a nose-shaped step formed by inwards sinking, the top of the nose-shaped step and the outer circle of the second gas ring form a groove with gradually shallower depth from bottom to top, and the nose-shaped steps are uniformly arranged along the outer circumference of the second gas ring.
The beneficial effects are that: 1. the base material of each ring has the characteristic of high strength, and is not easy to break, wherein the structure of the oil ring adopts a drilling type circular oil return hole, the stress concentration is small, and the strength of the ring body is ensured. The coating of each ring has good wear resistance and good matching performance with the cylinder, and ensures good service life.
2. The outer circle and the end face of the top ring are protected by the wear-resistant coating, so that the wear-resistant performance is effectively ensured, the long-term performance stability is facilitated to be kept, and under the condition that the two rings and the oil ring have strong oil scraping capacity, the possibility of critical friction or instantaneous dry friction exists in the top ring, the DLC coating on the outer circle surface of the top ring has good self-lubricating performance, and the occurrence of cylinder pulling can be effectively prevented.
3. The nose-shaped step of the second gas ring effectively ensures the oil scraping performance, not only can effectively scrape redundant engine oil, but also has enough space to release dynamic pressure generated by scraping the engine oil, thereby preventing the engine oil from channeling upwards. The nose-shaped step also reduces the effective contact surface height of the outer circle, and can reduce the elasticity of the ring and friction power consumption on the premise of keeping higher surface pressure. The chamfer or cutting table of the inner circle of the second gas ring near the lower end surface generates a reverse twisting effect, the positive twisting effect generated by the outer circular nose cutting table is counteracted, the end surface is kept smooth, the joint between the ring and the ring groove is good, the tightness is ensured, and the problem of poor local joint of the end surface generated by single twisting effect is solved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a second embodiment of the present utility model;
FIG. 3 is a schematic view of a top ring of the present utility model;
FIG. 4 is a schematic view of a second gas ring according to a first embodiment of the present utility model;
FIG. 5 is a schematic view of a second gas ring in accordance with a second embodiment of the present utility model;
FIG. 6 is a schematic view of a combination oil ring of the present utility model;
FIG. 7 is an enlarged view of a portion of a second manifold ring according to the present utility model;
fig. 8 is a partial schematic view of the wiper strip of the present utility model.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the attached drawings and the specific embodiments.
Embodiment one:
As shown in fig. 1, a piston ring set of a heavy duty diesel engine for a vehicle is composed of three rings, wherein a top ring 1, a second gas ring 2 and a combined oil ring 3 are respectively arranged from top to bottom, the combined oil ring 3 comprises an oil ring body 4 and a spiral supporting spring 5 arranged in an inner circular groove, and a latch pin for connecting the spiral supporting spring connector is further arranged in the spiral supporting spring 5.
As shown in figure 3, the height of the top ring 1 is 3.0mm, the radial thickness is between 28 and 32 according to the ratio of the cylinder diameter to the radial thickness, the material is steel, the outer circular surface of the top ring 1 structure is provided with an asymmetric barrel surface profile, and the section is a trapezoid section. The outer circular surface of the top ring 1 is applied with a DLC coating after integral nitridation. The hardness of the nitriding layer is more than 700HV0.1, the depth of the nitriding layer on the upper end face and the lower end face is more than 0.01mm, and the depth of the nitriding layer on the outer circular surface is 0.03-0.08 mm. The thickness of the DLC coating of the outermost layer is 0.01 mm-0.025 mm.
As shown in fig. 4, the ring height of the second gas ring 2 is 2.5mm, the radial thickness is 25-30 according to the ratio of the cylinder diameter to the radial thickness, the material is spheroidal graphite cast iron, and MC52 grade or MC56 grade is selected. The outer circle of the second gas ring 2 is an annular contact platform 11 and a conical surface 10 which is inclined inwards from the top of the contact platform, the inclination angle is alpha, and the inner circle is provided with a chamfer 8, so that the gas ring has a reverse twisting effect. Meanwhile, the outer circle of the second gas ring 2 is further provided with a nose-shaped step formed by inwards sinking, the top of the nose-shaped step and the outer circle of the second gas ring 2 form a groove with gradually shallower depth from bottom to top, and the nose-shaped steps are uniformly arranged along the outer circumference of the second gas ring 2. The outer circular surface of the second gas ring 2 is semi-embedded with a plating layer with the thickness of 0.06-0.15 mm, and the plating layer is a chromium and ceramic particle composite plating layer with the hardness of 900-1200HV0.1.
As shown in fig. 6, the combined oil ring 3 has a ring height of 3.0mm, the material is spheroidal graphite cast iron, and MC52 grade is selected; the outer circle of the oil ring body is also provided with an oil scraping belt 6. The spiral supporting spring 5 is made of heat-resistant alloy steel wires, and the latch pin is made of stainless steel wires. The combined oil ring is provided with 72 circular oil return holes, the inner circular groove is similar to a V shape, the outer circle of the oil scraping belt 6 is also provided with an annular contact platform 11 and a conical surface 10 which is inclined inwards from the top of the contact platform, the inclination angle is alpha, and the width of the platform is 0.04-0.18 mm. The outer circle of the oil scraping belt 6 is coated with a chromium and diamond particle composite coating with the thickness of more than 0.08mm and the hardness of 900-1200HV0.1, and the outer side is coated with a DLC coating with the thickness of 0.005-0.01 mm and the hardness of 1800-3000HV0.025.
Embodiment two:
As shown in fig. 2, a piston ring set of a heavy duty diesel engine for a vehicle is composed of three rings, namely a top ring 1, a second gas ring 2 and a combined oil ring 3 from top to bottom, wherein the combined oil ring 3 comprises an oil ring body 4 and a spiral supporting spring 5 arranged in an inner circular groove, wherein a latch pin for connecting the spiral supporting spring connector is further arranged in the spiral supporting spring 5.
As shown in figure 3, the height of the top ring 1 is 2.5mm, the radial thickness is between 28 and 32 according to the ratio of the cylinder diameter to the radial thickness, the material is steel, the outer circular surface of the top ring 1 structure is provided with an asymmetric barrel surface profile, and the section is a trapezoid section. The outer circular surface of the top ring 1 is applied with a DLC coating after integral nitridation. The hardness of the nitriding layer is more than 700HV0.1, the depth of the nitriding layer on the upper end face and the lower end face is more than 0.01mm, and the depth of the nitriding layer on the outer circular surface is 0.03-0.08 mm. The thickness of the DLC coating of the outermost layer is 0.01 mm-0.025 mm.
As shown in fig. 5, the ring height of the second gas ring 2 is 2.0mm, the radial thickness is 25-30 according to the ratio of cylinder diameter to radial thickness, the material is spheroidal graphite cast iron, the outer circle of the second gas ring 2 is an annular contact platform 11 and a conical surface 10 which is inclined inwards from the top of the contact platform, the inclination angle is alpha, and the inner circle is provided with a cutting table 9, so that the anti-twisting effect is realized. Meanwhile, the outer circle of the second gas ring 2 is further provided with a nose-shaped step formed by inwards sinking, the top of the nose-shaped step and the outer circle of the second gas ring 2 form a groove with gradually shallower depth from bottom to top, and the nose-shaped steps are uniformly arranged along the outer circumference of the second gas ring 2. The outer circular surface of the second gas ring 2 is semi-embedded with a plating layer with the thickness of 0.06-0.15 mm, and the plating layer is a chromium and ceramic particle composite plating layer with the hardness of 900-1200HV0.1.
As shown in fig. 6, the combined oil ring 3 has a ring height of 3.5mm and is made of spheroidal graphite cast iron; the outer circle of the oil ring body is also provided with an oil scraping belt 6. The spiral supporting spring 5 is made of heat-resistant alloy steel wires, and the latch pin is made of stainless steel wires. The combined oil ring is provided with 72 circular oil return holes, the inner circular groove is similar to a V shape, the outer circle of the oil scraping belt 6 is also provided with an annular contact platform 11 and a conical surface 10 which is inclined inwards from the top of the contact platform, the inclination angle is alpha, and the width of the platform is 0.04-0.18 mm. The outer circle of the oil scraping belt 6 is coated with a chromium and diamond particle composite coating with the thickness of more than 0.08mm and the hardness of 900-1200HV0.1, and the outer side is coated with a DLC coating with the thickness of 0.005-0.01 mm and the hardness of 1800-3000HV0.025.
Claims (7)
1. The piston ring group of the heavy-duty diesel engine for the vehicle is characterized by comprising a top ring (1), a second gas ring (2) and a combined oil ring (3); the second gas ring (2) is arranged below the top ring (1), and the combined oil ring (3) is arranged below the second gas ring (2); the top ring (1) is of a trapezoid cross section; the second gas ring (2) is of a rectangular cross section, a chamfer or a cutting table is arranged in the inner circle of the second gas ring (2), and the outer circle surface of the second gas ring (2) comprises an annular contact platform (11) and a conical surface (10) which is inclined inwards from the top of the contact platform; the combined oil ring (3) comprises an oil ring body (4), an inner circular groove is formed in the inner circular surface of the oil ring body (4), and a spiral supporting spring (5) is arranged in the inner circular groove.
2. The piston ring set for a heavy duty diesel engine for a vehicle according to claim 1, wherein the hardness of the nitriding layer of the top ring (1) is greater than 700hv0.1, the nitriding layer depth of the upper and lower end faces is greater than 0.01mm, the nitriding layer depth of the outer circular surface is 0.03-0.08 mm, and the DLC coating thickness of the outer circular surface is 0.01-0.025 mm.
3. The piston ring set of the heavy duty diesel engine for the vehicle according to claim 1, wherein the electroplated layer of the second gas ring (2) is a chromium layer or a chromium and ceramic particle composite plated layer, and the thickness of the plated layer is 0.06-0.15 mm.
4. The piston ring set of the heavy duty diesel engine for the vehicle according to claim 1, wherein the combined oil ring (3) further comprises an oil scraping belt (6), the outer circle of the oil scraping belt (6) is provided with a chromium and diamond particle composite coating, the thickness is more than 0.08mm, the hardness is 900-1200HV0.1, the outer layer is provided with a DLC coating, the thickness is 0.005-0.01 mm, and the hardness is 1800-3000HV0.025.
5. The piston ring set for the heavy duty diesel engine for the vehicle according to claim 4, wherein the outer circle of the oil scraping belt (6) is provided with an annular contact platform (11) and a conical surface (10) which is inclined inwards from the top of the contact platform.
6. The piston ring set for a heavy duty diesel engine for a vehicle according to claim 1, wherein the ring height of the top ring (1) is 2.5mm or 3.0mm, the ring height of the second gas ring (2) is 2.0mm or 2.5mm, and the ring height of the combined oil ring (3) is 3.0mm or 3.5mm.
7. The piston ring set of the heavy duty diesel engine for the vehicle according to claim 1, wherein the outer circle of the second gas ring (2) is further provided with a nose-shaped step (7) formed by recessing inwards, the top of the nose-shaped step (7) and the outer circle of the second gas ring (2) form a groove with gradually shallower depth from bottom to top, and the nose-shaped steps (7) are uniformly arranged along the outer circumference of the second gas ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322931558.9U CN220869529U (en) | 2023-10-31 | 2023-10-31 | Piston ring set of heavy diesel engine for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322931558.9U CN220869529U (en) | 2023-10-31 | 2023-10-31 | Piston ring set of heavy diesel engine for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220869529U true CN220869529U (en) | 2024-04-30 |
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ID=90810505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322931558.9U Active CN220869529U (en) | 2023-10-31 | 2023-10-31 | Piston ring set of heavy diesel engine for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220869529U (en) |
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2023
- 2023-10-31 CN CN202322931558.9U patent/CN220869529U/en active Active
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