CN1932270A - Piston-ring packing - Google Patents
Piston-ring packing Download PDFInfo
- Publication number
- CN1932270A CN1932270A CNA2006101536647A CN200610153664A CN1932270A CN 1932270 A CN1932270 A CN 1932270A CN A2006101536647 A CNA2006101536647 A CN A2006101536647A CN 200610153664 A CN200610153664 A CN 200610153664A CN 1932270 A CN1932270 A CN 1932270A
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- China
- Prior art keywords
- piston
- ring
- piston ring
- slip surface
- wear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000012856 packing Methods 0.000 title claims description 55
- 238000000576 coating method Methods 0.000 claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 239000011241 protective layer Substances 0.000 claims description 30
- 238000010304 firing Methods 0.000 claims description 21
- 239000010410 layer Substances 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 239000003082 abrasive agent Substances 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims description 3
- 229910001651 emery Inorganic materials 0.000 claims description 3
- 229910003470 tongbaite Inorganic materials 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 18
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 208000002193 Pain Diseases 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000008041 oiling agent Substances 0.000 description 2
- 206010017389 Frotteurism Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007749 high velocity oxygen fuel spraying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- -1 or the like.At last Chemical compound 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/22—Rings for preventing wear of grooves or like seatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
Abstract
The package has two piston rings (K1, K2) provided with respective bearing surfaces (L1, L2), where the rings are manufactured from cast-material. The rings are arranged in respective piston ring grooves (N1, N2) of a piston (2) in such a manner that the bearing surfaces stay in frictional contact with a cylinder bearing surface (7) of a cylinder wall (3) in an operating condition. The bearing surfaces of the piston rings comprise a wear protection coating (6) consisting of material e.g. aluminum oxide. An independent claim is also included for a piston comprising a piston ring package.
Description
Technical field
The present invention relates to a kind of piston-ring packing that is used for the piston of two-stroke large diesel engine, also relate to a kind of piston with piston-ring packing of the present invention.
Background technique
Usually, the piston that is used for large-sized diesel motor in the prior art all is equipped with one group of piston ring on another, and each piston ring is installed in the corresponding piston groove.Known piston-ring packing generally includes at least two piston rings, but is three mostly, four even five piston rings, and this will decide according to the size of this large-sized diesel motor and/or the requirement or the special operating conditions of power and/or engine operation.
These piston rings can be realized various functions, and guidance piston in cylinder for example distributes on the slip surface of cylinder and/or scrapes off oiling agent, realize the firing chamber to the sealing of crankcase etc., and in working order down, they are subjected to heavy load.Therefore, the slip surface of these piston rings and cylinder is in direct rubbing contact state, and firing pressure need be born by them, and finally be exposed to sizable heat, machinery with the load of chemistry.
In this device, the piston ring that is subjected to maximum load (particularly relevant bear firing pressure) is to be configured in the piston ring of the firing chamber of close cylinder, usually it is called " apical ring ".In this respect, from the piston ring that prior art is known, have only apical ring just to have a wear-resistant protection coating, i.e. so-called thin low wearing and tearing coating on its slip surface, this coating for example can be made up of suitable chromium pottery.On the contrary; other piston rings of piston-ring packing do not have wear-resistant protective layer; but has a removable bedding-in layer as slip surface; be so-called break-in layer (this break-in layer is ground away quickly in the well-known mode of a kind of those skilled in the art in the present technique field); therefore; after finishing in the bedding-in stage, the corresponding piston ring just moves ideally along the casing wall of cylinder liner.
As can be seen, this solution has caused some problem in this device.After finishing running-in period, that is, after the break-in layer wore away substantially, the body material of piston ring (for example being a kind of cast iron materials) just exposed on the slip surface of piston ring, thereby the slip surface of it and cylinder wall is in the rubbing contact state.That is, down, produced rubbing contact between two kinds of casting materiales of piston ring and cylinder wall in working order, this rubbing contact will cause huge frictional loss, and under even worse situation, it will produce so-called " abrasion ", also be called " stinging erosion ".
In this device of prior art, have only apical ring (that is to say that piston-ring packing is configured in that piston ring of the firing chamber of close cylinder) to be coated with the reason that a wear-resistant protective layer has good several respects why.On the one hand, apical ring is the heaviest piston ring of bearing load.The imagination of making according to the view of generally acknowledging is, a wear-resistant protective layer of apical ring is just enough, because the piston ring of other in the piston-ring packing all is positioned at the below of apical ring, as if load is much smaller, thereby thinks that it is unnecessary adding coating.On the other hand, the plating of wear-resistant protective layer is quite complicated, and during special charges and the expense costliness, one of reason wherein is because wear-resistant protective layer needs very accurately to make, so that guarantee the best fit of piston ring in cylinder and desirable operation.
In addition, also have a generally acknowledged view to be, the piston ring with wear-resistant protective layer that is positioned at below the apical ring will produce adverse influence to the oil film of the oiling agent on the cylinder wall.As everyone knows, apical ring also plays a part scraper ring, that is to say, it can be extracted along the direction of leaving crankcase the lubricant oil that is coated on the slip surface of cylinder wall out from the firing chamber, and vice versa.Can prevent that like this, on the one hand a large amount of lubricant oil from participating in combustion process.On the other hand, lubricant oil can be retracted to the piston ring that is positioned at its below by the apical ring that plays the scraper ring effect, thereby improve the lubricated of them.
In this device, the knife-type oil stripping action of apical ring is still because the specific structure shape of the slip surface of apical ring, and is because the specific fluid dynamic that interaction caused of the slip surface of the cylinder wall that coating surface and cast iron materials are made and relevant therewith specific Frotteurism produce.
Therefore; it is contemplated that; if a piston ring that is positioned at apical ring below and has a wear-resistant protective layer also plays a part a scraper ring; so not only will seriously damage the lubricated of residue piston ring in the piston-ring packing; and will can damage the lubricated of apical ring especially; thereby can expect that the danger of stinging erosion will increase greatly.
Therefore, the those skilled in the art in the present technique field are clear, and the piston ring below apical ring should not have wear-resistant protection coating.
About four-stroke ic engine (for example motor described in DE 195 04 803 A1), it is well-known that the piston ring that is configured in the apical ring below has coating.Four stroke engine why that Here it is when they for example use, has a reason that is different from the lubrication system of two-stroke large diesel engine fully in automobile.For this known four stroke engine, enough lubricant oil supplies are not only arranged on the slip surface of cylinder, and, in general, even on the slip surface of cylinder, also have remaining lubricant oil, therefore, a large amount of lubricant oil is skidded off the oil sump of getting back to crankcase from slip surface.
But, proved already that particularly in the two-stroke large motor (its trend is towards bigger power and/or specific power) in modern times, the piston ring that is configured in the apical ring below was bearing unprecedented big load.Also proved already, at the piston ring of making by cast iron materials and after equally also being running-in period between the cylinder wall of being made by cast iron materials, the frictional loss problem that takes place has down seriously been underestimated in working order.
Summary of the invention
Therefore, the objective of the invention is to propose a kind of improved piston-ring packing, and a kind of piston with this class piston-ring packing, this piston-ring packing guarantees to improve greatly the ride quality of piston, the more cost effective operation of higher wear resistance and resultant two-stroke large motor.
Therefore, the present invention relates to a kind of piston-ring packing that is used for the piston of two-stroke large diesel engine.In this device, piston is configured under installment state and can moves back and forth along the cylinder wall of this two-stroke large diesel engine cylinder, and this piston-ring packing comprises the firing chamber that is configured in the most close cylinder and has the first piston ring of first slip surface and have second piston ring of second slip surface.The first piston ring and second piston ring are configured in respectively in the first piston annular groove and second-ring groove of piston by this way; make in working order down; first slip surface of first piston ring and second slip surface of second piston ring and cylinder wall are in the rubbing contact state; it is characterized in that; in this device, first slip surface of first piston ring and second slip surface of second piston ring comprise wear-resistant protective layer.
Therefore, for purposes of the invention importantly, except apical ring, the other piston ring of at least one in the piston-ring packing (preferably that piston ring of the most close apical ring) comprises a wear-resistant protective layer on its slip surface.
Beyond thought is to prove already that by this measure, the friction condition of the remaining piston ring of piston-ring packing and roadability just can not worsen.Just the opposite: the suitable design of this piston ring by being provided with wear-resistant protective layer equally; the particularly suitable selection of the suitable design of the slip surface by this piston ring and/or remaining piston ring and/or the configuration by the piston ring in piston-ring packing, the roadability of piston-ring packing can obtain very big improvement by the piston ring with wear-resistant protective layer that is configured in the apical ring below.
In a certain embodiments, this piston-ring packing comprises the 3rd piston ring with the 3rd slip surface, this piston ring is configured in the 3rd piston ring groove, and in working order down, the cylinder slip surface of the 3rd slip surface and cylinder wall is in the rubbing contact state.
In this device, second slip surface and/or the 3rd slip surface comprise wear-resistant protective layer and/or break-in layer.Therefore, for example, second piston ring (this piston ring for example is configured in the most close first piston ring place that also is called apical ring) comprises a wear-resistant protective layer, while the 3rd piston ring, and perhaps other piston rings in the piston-ring packing all are provided with a break-in layer.Obviously, except second piston ring, other piston rings in the 3rd piston ring and/or the piston-ring packing can comprise wear-resistant protective layer equally.
In another embodiment, can also realize following apparatus, the piston ring that is configured in the most close first piston ring comprises a break-in layer, and simultaneously, the 3rd piston ring and/or other piston rings that are configured in this piston ring below then comprise wear-resistant protective layer.In working order down, when the load on acting on the piston ring that is configured in the most close first piston ring did not surpass a predetermined maximum load, this device was particularly advantageous, can not need wear-resistant protective layer thereby make on this piston ring.But; a piston ring that is positioned at this piston ring below but should have wear-resistant protective layer; because for example can improve oil film in the piston-ring packing zone, thereby make the friction of piston-ring packing and other roadability can reach optimization on the whole by this way.
According to the present invention, in a certain embodiments of piston-ring packing, the first piston ring and/or second piston ring and/or the 3rd piston ring and/or other piston rings are all made by high-abrasive material.That is, being generally used for the casting material of piston ring material can be by adding suitable composition or suitable alloying element is made wear-resisting.This method can realize by for example adding known material or the alloying element that this casting material is fit to; for example pass through to add pottery or oxide, such as chromium, the chromium pottery; aluminium oxide; silicate, Bristol in the emery, particularly spy (Tritor); CKS-36; CKS-37 and carbide, particularly chromium carbide, these materials all are well-known wear-resistant protection layer materials as piston ring for the those skilled in the art in the present technique field.Obviously, under some particular case, piston ring all can be made by high-abrasive material, thereby the casting material that is generally used for piston ring that prior art can be familiar with is abandoned or part is abandoned.
In an embodiment to the practical application particular importance, wear-resistant protective layer is a kind of wear-resistant protection coating.In this device; the thickness of the thickness of the thickness of the wear-resistant protection coating of second piston ring and/or the wear-resistant protection coating of the 3rd piston ring and/or the wear-resistant protection coating of each other piston ring can be the first piston ring wear-resistant protection coating thickness 100%; particularly has only 3/4 of this thickness; preferably has only 1/2 of this thickness; be more preferably and have only 1/3 of this thickness; preferably having only 1/4 of this thickness, perhaps is at most 10% of this thickness.
In this device, if first and/or second and/or the 3rd and/or the thickness of the wear-resistant protection coating of other piston rings may be particularly advantageous less than the thickness of the first wear-resistant protection coating.The load more suffered down in working order than first piston ring usually owing to the load of second piston ring and each other piston ring is little a lot; so; the second, the three and the thickness of wear-resistant protection coating that may other piston rings can be chosen as thickness in many cases less than the wear-resistant protection coating of first piston ring.The representative value of the thickness of the wear-resistant protection coating of first piston ring is 200 microns to 660 microns, particularly 330 microns to 400 microns.The thickness of the wear-resistant protection coating of second piston ring and other piston rings for example can be selected littler thickness, and for example 10 microns to 200 microns, particularly 50 microns to 100 microns.
In this device, selecting less thickness for the wear-resistant protective layer of second piston ring and/or each other piston ring is for the care to economic benefits fully.That is to say that protective layer is preferably electroplated or carried out by laser cladding, therefore making coating pile up needed time loss increases along with increasing progressively of thickness of coating.
In this respect, should be pointed out that wear-resistant protection coating certainly uses any other suitable coating method to make, and that is to say; for example use heat spraying method, such as HVOF, plasma spraying; flame spraying, powder spraying and other suitable coating methods for example weld etc.
In this respect, for example, the every other piston ring in second piston ring of the present invention and/or the piston-ring packing can be made by the blank identical with the piston ring blank of making the first piston ring.Because the piston ring blank has one usually the ring width between 5 millimeters and 50 millimeters (preferably having a width between 15 millimeters and 30 millimeters); the whole width of piston ring is not subjected to the influence of coating basically; therefore, the thickness difference of the wear-resistant protection coating of tens microns or hundreds of micron can not influence the correct cooperation of piston ring in cylinder in practice.
In this respect, the slip surface of the first piston ring and/or second piston ring and/or the 3rd piston ring and/or other piston rings preferably is formed in along protruding on the direction of the cylinder slip surface of cylinder wall.
In this device, the slip surface of the first piston ring and/or second piston ring and/or the 3rd piston ring and/or other piston rings can be along being designed to symmetry and/or asymmetric shape towards the direction of cylinder slip surface with respect to the central plane of each piston ring.
For piston-ring packing of the present invention in practice among the embodiment of particular importance; the first piston ring (be that is to say; be apical ring) be designed to asymmetric shape and bear the function of scraper ring; simultaneously the slip surface of second piston ring in the piston-ring packing or other piston rings or wear-resistant protective layer are designed to the shape of symmetry with respect to the central plane of each piston ring; with second or the interface, outside of the slip surface of other piston rings along making convex shape towards the direction of cylinder slip surface; for example, particularly make the shape of circular section of the symmetry of a circle.
In another embodiment, the slip surface of the first piston ring and/or second piston ring and/or the 3rd piston ring and/or other piston rings can be designed to asymmetric shape, particularly along protrude towards the firing chamber direction asymmetricly.
Should be understood that, in another embodiment, the slip surface of the first piston ring and/or second piston ring and/or the 3rd piston ring and/or other piston rings can be along being designed to asymmetric shape towards the direction of cylinder slip surface with respect to the central plane of this piston ring, particularly along protrude away from the firing chamber direction asymmetricly.
Specifically, first piston ring preferred design one-tenth is along protrude towards the direction of burning the chamber, perhaps protrude along the direction away from the firing chamber, thereby make the first piston ring can realize the function of scraper ring asymmetricly asymmetricly.
Wear-resistant protective layer; it is piston ring itself; perhaps the wear-resistant protection coating on the piston ring of being made by cast iron materials is comprising chromium and/or aluminium oxide and/or silicate and/or emery and/or chromium pottery; particularly Bristol (Tritor) and/or CKS-36 and/or CKS-37 and/or carbide in the spy; chromium carbide particularly, or the like.At last, the wear-resistant protection material that all are known as long as they help the formation of wear-resistant protective layer or the manufacturing of the piston ring that helps being made by high-abrasive material, all is suitable.
Obviously, the embodiment of piston-ring packing of the present invention described above can only be understood as some concrete instances, particularly piston-ring packing can also comprise the piston ring more than three, that is to say, comprise four, five, six or more a plurality of piston ring, and the present invention also comprises all suitable assemblies of the embodiment that these had illustrated.
In addition, the invention still further relates to a kind of piston with piston-ring packing of top mistake described in detail.
Description of drawings
Below, the present invention will be by means of being described with the accompanying drawing shown in the sketch form, in the accompanying drawing:
Fig. 1 is the cylinder with two-stroke large diesel engine of piston-ring packing of the present invention;
Fig. 2 is an embodiment of piston-ring packing of the present invention;
Fig. 3 a is a piston ring with the asymmetric slip surface of convex;
Fig. 3 b is another embodiment of the piston ring of Fig. 3 a;
Fig. 3 c is a piston ring with convex symmetry slip surface;
Fig. 4 is another embodiment of piston-ring packing of the present invention.
Embodiment
Fig. 1 shows a two-stroke large diesel engine cylinder with piston-ring packing of the present invention with the sketch form of broken section, and this piston-ring packing is whole hereinafter to be marked with label 1.
Piston 2 is arranged in the cylinder 4 in a known way, and is configured to and can reciprocally moves along the cylinder slip surface 7 of cylinder wall 3.Piston 2, cylinder wall 3 and cylinder head 8 define the firing chamber 5 of cylinder 4.Being used for the spraying valve 10 that the exhaust valve 9 and being used for of combustion gas sprays into fuel all is arranged in the cylinder head 8.The piston-ring packing 1 that has a plurality of piston rings according to the present invention is configured on the piston 2, and as shown in fig. 1, for the purpose of figure was clear, only showing two piston rings among the figure was the first piston ring K1 and the second piston ring K2.By this figure as seen, piston ring K1 is configured in the position of close firing chamber, and this piston ring is configured in the piston ring groove N1, and it also is called apical ring usually, and the second piston ring K2 then is configured in the piston ring groove N2 of first piston ring K1 below.
Obviously, when mentioning the second piston ring K2 in present specification, this piston ring K2 automatically is not exactly that piston ring that is configured in the most close first piston ring K1.On the contrary, in some cases, can there be one or more piston ring to be configured between the first piston ring K1 and the second piston ring K2 fully, therefore, under specific situation, the second piston ring K2 also can be the nethermost piston ring in the piston-ring packing, that is to say, this piston ring is configured in the highest distance position place of leaving first piston ring K1.
In the certain embodiments shown in Figure 1; the first piston ring K1 and the second piston ring K2 are made in known manner by casting material; first piston ring K1 not only; and second piston ring K2 all be provided with wear-resistant protection coating 6; this wear-resistant protection coating is designed to a kind of convex shape, thus with convex shape along extending towards the direction of cylinder slip surface 7.Under the working state of this two-stroke large diesel engine, piston ring K1, the wear-resistant protective layer 6 of K2 is in the rubbing contact state with the cylinder slip surface 7 of cylinder 4.
A certain embodiments of piston-ring packing 1 is shown in Figure 2, and for the purpose of figure was clear, piston 2 and cylinder 4 all omitted among the figure.
Show the first piston ring K1 that is configured in the most close firing chamber 5, firing chamber 5 is with respect to piston ring K1, K2, and the position of K3 illustrates with the arrow with label 5.The first piston ring K1 and the second piston ring K2 are that known piston ring blank 11 of B casting material itself or piston ring base substrate 11 are made for the H width highly by two substantially the same its.The first piston ring K1 and the second piston ring the K2 first slip surface L1 and the second slip surface L2 respectively are provided with wear-resistant protection coating 6, and make the wear-resistant protection coating 6 of first piston ring K1 have thickness S1 and make the wear-resistant protection coating 6 of the second piston ring K2 have thickness S2.In this device, piston ring K1, the width B of the piston ring base substrate 11 of K2 is greater than the thickness S1 of wear-resistant protection coating 6, S2.For example, the width B of piston ring base substrate 11 can reach 25 millimeters, and the thickness S1 of the wear-resistant protection coating 6 of first piston ring K1 can reach 350 microns, and the thickness S2 of the wear-resistant protection coating 6 of the second piston ring K2 only is 75 microns.In the embodiment shown in Figure 2, the second slip surface L2 of the first slip surface L1 of first piston ring K1 and the second piston ring K2 is designed to central plane with respect to piston ring along the direction towards cylinder slip surface 7 (not shown among Fig. 2) and is leaving on the direction of firing chamber 5 asymmetric projectedly.
Piston ring K1 with width B, K2, three certain embodiments of the wear-resistant protection coating 6 that is designed to convex shape of K3 are shown in Fig. 3 a, and 3b is among the 3c.Should be pointed out that be not with anti-wear coating and the whole piston ring that constitutes by high-abrasive material itself certainly can be on its slip surface legend in reference to the accompanying drawings design.
Bearing surface of piston L1, L2, the asymmetric convex shape embodiment of L3 is shown in respectively among Fig. 3 a and the 3b.Embodiment among Fig. 3 a shows slip surface L1, L2, and a kind of like this embodiment of L3, this slip surface is asymmetric projectedly on away from the direction of firing chamber 5 with respect to central plane I-I along the direction of cylinder slip surface 7 (not shown)s.On the contrary, in Fig. 3 b, show slip surface L1, L2, the another kind of embodiment of L3, this slip surface along the direction of cylinder slip surface 7 (not shown)s with respect to central plane I-I asymmetric projectedly on the direction of firing chamber 5.
At last, Fig. 3 c finally shows an embodiment of particular importance in practice, wherein, along the direction towards cylinder slip surface 7 (not shown), shows the slip surface L1 with respect to central plane I-I symmetry, L2, the embodiment of L3.This embodiment is as the slip surface L2 of the second piston ring K2 and/or the 3rd piston ring K3 and/or other piston rings, and L3 is more suitably.
At last, show another embodiment of piston-ring packing of the present invention with the sketch form of broken section in Fig. 4, this embodiment is particular importance in practice.
Piston 2 shown in Fig. 4 has at least three piston ring groove N1, and N2 and N3, these piston ring grooves are used for holding first piston ring K1 respectively, the second piston ring K2 and the 3rd piston ring K3.In working order down, piston ring K1, K2, the slip surface L1 of K3, L2, the cylinder slip surface 7 of the cylinder wall 3 of L3 and cylinder 4 (it is only shown in Figure 4) is in the rubbing contact state.
First piston ring K1 that is to say, is configured in the piston ring of the most close firing chamber 5; to be provided with a wear-resistant protective layer 6 with the identical mode of the second piston ring K2, in the present embodiment, the second piston ring K2 is directly adjacent with first piston ring K1; shown in this accompanying drawing, it is positioned at the below of K1.The 3rd piston ring K3 is owing to be arranged in the piston ring groove N3, and its load ratio first piston ring K1 and the second piston ring K2 are much smaller, and this piston ring is provided with self known break-in layer, and this break-in layer just forms the slip surface L3 of the 3rd piston ring K3.
In this device, the slip surface L1 of first piston ring K1 is made asymmetric convex shape, except other functions, can also realize the function of scraper ring in self known mode.On the contrary, the second piston ring K2 is made the convex shape of symmetry, promptly, the slip surface L2 of the second piston ring K2 is made symmetry with respect to central plane I-I, can in the zone of piston-ring packing 1, realize advantageous particularly and equally distributed oil film in this way, particularly, can guarantee the true lubrication of piston ring K1 thus.
Claims (14)
1. piston-ring packing that is used for the piston (2) of two-stroke large diesel engine; described piston (2) is configured under installment state and can moves back and forth along the cylinder wall (3) of the cylinder (4) of this two-stroke large diesel engine; wherein; piston-ring packing (1) comprises the firing chamber (5) that is configured in the most close cylinder (4) and the first piston ring (K1) with first slip surface (L1) and second piston ring (K2) with second slip surface (L2); first piston ring (K1) and second piston ring (K2) are configured in respectively in the first piston annular groove (N1) and second-ring groove (N2) of piston (2) by this way; make in working order down; first slip surface (L1) of first piston ring (K1) and second slip surface (L2) of second piston ring (K2) are in the rubbing contact state with the cylinder slip surface (7) of cylinder wall (3); it is characterized in that first slip surface (L1) of first piston ring (K1) and second slip surface (L2) of second piston ring (K2) comprise wear-resistant protective layer.
2. piston-ring packing as claimed in claim 1, wherein, at least the 3rd piston ring (K3) that has the 3rd slip surface (L3) is arranged in the 3rd piston ring groove (N3), and in working order down, the 3rd slip surface (L3) is in the rubbing contact state with the cylinder slip surface (7) of cylinder wall (3).
3. piston-ring packing as claimed in claim 1 or 2, wherein, second slip surface (L2) and/or the 3rd slip surface (L3) comprise wear-resistant protective layer and/or break-in layer (12).
4. each described piston-ring packing in the claim as described above, wherein, first piston ring (K1) is made by high-abrasive material.
5. each described piston-ring packing in the claim as described above, wherein, second piston ring (K2) is made by high-abrasive material.
6. each described piston-ring packing in the claim as described above, wherein, the 3rd piston ring (K3) is made by high-abrasive material.
7. each described piston-ring packing in the claim as described above, wherein, this wear-resistant protective layer is wear-resistant protection coating (6).
8. each described piston-ring packing in the claim as described above; wherein; the thickness of the thickness (S3) of the thickness (S2) of the wear-resistant protection coating (6) of second piston ring (K2) and/or the wear-resistant protection coating (6) of the 3rd piston ring (K3) and/or the wear-resistant protective layer of other piston rings can be first piston ring (K1) wear-resistant protection coating (6) thickness (S1) 100%; particularly has only 3/4 of this thickness (S1); preferably has only 1/2 of this thickness (S1); be more preferably and have only 1/3 of this thickness (S1); preferably having only 1/4 of this thickness (S1), perhaps is at most 10% of this thickness (S1).
9. each described piston-ring packing in the claim as described above, wherein, slip surface (the L1 of first piston ring (K1) and/or second piston ring (K2) and/or the 3rd piston ring (K3) and/or other piston rings, L2 L3) is designed to along the convex shape towards the cylinder slip surface direction of cylinder wall (3).
10. each described piston-ring packing in the claim as described above, wherein, slip surface (the L1 of first piston ring (K1) and/or second piston ring (K2) and/or the 3rd piston ring (K3) and/or other piston rings, L2, L3) along towards the direction of cylinder slip surface (7) with respect to each piston ring (K1, K2, central plane K3) (I-I) are designed to symmetry and/or asymmetric.
11. each described piston-ring packing in the claim as described above, wherein, the slip surface of first piston ring (K1) and/or second piston ring (K2) and/or the 3rd piston ring (K3) and/or other piston rings is designed to asymmetric shape, particularly along the asymmetric protrusion of (5) direction towards the firing chamber.
12. each described piston-ring packing in the claim as described above, wherein, the slip surface of first piston ring (K1) and/or second piston ring (K2) and/or the 3rd piston ring (K3) and/or other piston rings is designed to asymmetric shape, particularly along towards the direction of cylinder slip surface (7) with respect to piston ring (K1, K2, K3) central plane (I-I) is designed to protrude asymmetricly, especially along protrude away from firing chamber (5) direction asymmetricly.
13. each described piston-ring packing in the claim as described above; wherein; wear-resistant protective layer comprises Bristol (Tritor) and/or CKS-36 and/or CKS-37 and/or carbide, particularly chromium carbide in chromium and/or aluminium oxide and/or silicate and/or emery and/or the chromium pottery, particularly spy.
14. one kind as having the piston of each described piston-ring packing in the aforementioned claim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05405538.9 | 2005-09-13 | ||
| EP05405538 | 2005-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1932270A true CN1932270A (en) | 2007-03-21 |
Family
ID=35464334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101536647A Pending CN1932270A (en) | 2005-09-13 | 2006-09-12 | Piston-ring packing |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007077988A (en) |
| CN (1) | CN1932270A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102330611A (en) * | 2010-06-01 | 2012-01-25 | 瓦锡兰瑞士公司 | Wear-resisting stroke piston combustion engine |
| CN103620272A (en) * | 2011-05-10 | 2014-03-05 | 辉门布尔沙伊德有限公司 | Piston ring for two-stroke engines |
| CN104781593A (en) * | 2012-11-09 | 2015-07-15 | 联邦摩高布尔沙伊德公司 | Piston ring with varying apex lines |
| CN105283698A (en) * | 2013-04-11 | 2016-01-27 | 联邦摩高弗里德贝格公司 | Piston ring having varying attributes |
| CN106662246A (en) * | 2014-06-27 | 2017-05-10 | 株式会社理研 | Piston ring |
| CN107237702A (en) * | 2016-03-28 | 2017-10-10 | 易安迪机车公司 | For explosive motor and its Piston volume tube of system and method |
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| US9334830B2 (en) * | 2014-06-06 | 2016-05-10 | General Electric Company | Piston assembly for a reciprocating engine |
| JP6986107B2 (en) * | 2020-03-27 | 2021-12-22 | Ｔｐｒ株式会社 | Piston ring combination |
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- 2006-09-12 JP JP2006247023A patent/JP2007077988A/en active Pending
- 2006-09-12 CN CNA2006101536647A patent/CN1932270A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330611A (en) * | 2010-06-01 | 2012-01-25 | 瓦锡兰瑞士公司 | Wear-resisting stroke piston combustion engine |
| CN103620272A (en) * | 2011-05-10 | 2014-03-05 | 辉门布尔沙伊德有限公司 | Piston ring for two-stroke engines |
| CN103620272B (en) * | 2011-05-10 | 2016-01-13 | 辉门布尔沙伊德有限公司 | For the piston ring of two stroke engine |
| US9273629B2 (en) | 2011-05-10 | 2016-03-01 | Federal-Mogul Burscheid Gmbh | Piston ring for two-stroke engines |
| CN104781593A (en) * | 2012-11-09 | 2015-07-15 | 联邦摩高布尔沙伊德公司 | Piston ring with varying apex lines |
| CN104781593B (en) * | 2012-11-09 | 2016-08-17 | 联邦摩高布尔沙伊德公司 | There is the piston ring of change top line |
| CN105283698A (en) * | 2013-04-11 | 2016-01-27 | 联邦摩高弗里德贝格公司 | Piston ring having varying attributes |
| CN106662246A (en) * | 2014-06-27 | 2017-05-10 | 株式会社理研 | Piston ring |
| CN106662246B (en) * | 2014-06-27 | 2018-09-14 | 株式会社理研 | Piston ring |
| CN107237702A (en) * | 2016-03-28 | 2017-10-10 | 易安迪机车公司 | For explosive motor and its Piston volume tube of system and method |
| CN112654807A (en) * | 2018-08-13 | 2021-04-13 | 辉门布尔沙伊德公司 | Three-component oil scraper ring |
| CN112654807B (en) * | 2018-08-13 | 2023-02-21 | 辉门布尔沙伊德公司 | Three-component oil scraper ring |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007077988A (en) | 2007-03-29 |
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