CN106351762A - Self lubricating steam cylinder piston - Google Patents
Self lubricating steam cylinder piston Download PDFInfo
- Publication number
- CN106351762A CN106351762A CN201610989045.5A CN201610989045A CN106351762A CN 106351762 A CN106351762 A CN 106351762A CN 201610989045 A CN201610989045 A CN 201610989045A CN 106351762 A CN106351762 A CN 106351762A
- Authority
- CN
- China
- Prior art keywords
- cylinder piston
- self
- nanometer
- piston
- coating
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Lubricants (AREA)
- Coating By Spraying Or Casting (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a self lubricating steam cylinder piston. A plasma spray coating nanometer h-BN and graphene coating with the thickness being 20 to 30 mu m is formed on the surface of the piston. Through the composite coating, the friction coefficient and the abrasion rate are reduced at the same time; the friction coefficient is relatively low; meanwhile, the wear resistant performance better than that of the Cr coating is realized. Under the condition of each load, the abrasion rate is reduced by more than 50 percent through being compared with that of a base body.
Description
Technical field
The present invention relates to technical field of automobile, more particularly, to a kind of self-lubricating steam-cylinder piston.
Background technology
Piston is reciprocating parts in Motor Engine Cylinder body.The basic structure of piston can be divided into top, head
Portion and skirt section.Top land is the major part of composition combustor, and its shape is relevant with selected combustion-chamber shape.
Piston is in high temperature, high pressure, at a high speed, work under conditions of insufficient lubrication.Piston is directly contacted with high-temperature gas, instantaneously
Temperature, up to more than 2500k, therefore, is heated serious, and radiating condition is very poor, so temperature is very high during pistons work, top
Up to 600～700k, and Temperature Distribution is very uneven；It is very big that top land bears gas pressure, particularly expansion space stroke pressure
Maximum, gasoline engine is up to 3～5mpa, and diesel engine is up to 6～9mpa, and this allows for piston and produces impact, and bears lateral pressure
Effect；Piston is moved back and forth with very high speed (8～12m/s) in cylinder, and speed changes constantly, this generates
Very big inertia force, makes piston be subject to very big additional load.Piston this severe under conditions of work, can be deformed simultaneously
Accelerated wear test, also can produce additional load and thermal stress, be subject to the chemical attack of combustion gas to act on simultaneously.The frictional force of therefore piston
Larger.
Content of the invention
It is an object of the invention to proposing a kind of self-lubricating steam-cylinder piston, enabling to steam-cylinder piston friction and reducing.
For reaching this purpose, the present invention employs the following technical solutions:
A kind of self-lubricating steam-cylinder piston, described piston face have plasma spraying nanometer h-bn of 20-30 μ m thick with
Graphite ene coatings.
Coating of the present invention is that nanometer h-bn is mixed with graphite ene coatings.Preferably, described weight ratio is (3-
5): 1, preferably 4:1.
Described mixing is using planetary ball mill and centrifugal spraying granulator, coating to be dusted.Its technique includes:
(1) by nanometer h-bn granule and Graphene ball milling at least 5 minutes on planetary ball mill；
(2), when ball milling stops first 5 minutes, add organic binder ball milling, obtain suspension；
(3) suspension is carried out mist projection granulating, obtain nanometer h-bn and Graphene agglomerated particle.
Described nanometer h-bn and Graphene agglomerated particle are sprayed to steam-cylinder piston surface by plasma spraying by the present invention
On.Described plasma spraying, its electric current is 400-700a, and voltage is 30-70v, main gas argon flow amount 50-140l/min, powder feeding
Speed 25-60g/min.Preferably, electric current is 550a, voltage 30v, argon flow amount 50l/min.
Nanometer h-bn granule of the present invention, is existing product, and those skilled in the art can be bought by market
To it is also possible to prepare according to the method for prior art.The present invention no longer limits with regard to it.
The composite coating of the present invention makes coefficient of friction and wear rate reduce simultaneously, has relatively low coefficient of friction, each
Under individual load, wear rate reduces by more than 50% than matrix.
Specific embodiment
To further illustrate technical scheme below by specific embodiment.
Embodiment 1
Using planetary ball mill and centrifugal spraying granulator, coating material is dusted.Its technique includes:
(1) by nanometer h-bn granule and Graphene ball milling at least 5 minutes on planetary ball mill；
(2), when ball milling stops first 5 minutes, add organic binder ball milling, obtain suspension；
(3) suspension is carried out mist projection granulating, obtain nanometer h-bn and Graphene agglomerated particle.
By plasma spraying, described nanometer h-bn and Graphene agglomerated particle are sprayed on piston face.Described grade from
Son spraying, its electric current is 550a, voltage 30v, argon flow amount 50l/min.
Coating on described blower fan main shaft, it plays self-lubricating solid effect.
Comparative example 1
Omit the Graphene of embodiment 1, remaining is same as Example 1.
Comparative example 2
Nanometer h-bn is replaced with micron graphite, remaining is same as Example 1.
The coating of comparative example 1-2, equally can play lubrication, but described lubricant effect is slightly worse, simply compared to not containing
The piston of coating, improves.The lubricant effect of embodiment 1 will be substantially better than comparative example 1-2, and wear time is long, plays profit
The sliding time is also significantly longer.That is, 2 kinds of material mixing of the present invention, play synergism.
Claims (5)
1. a kind of self-lubricating steam-cylinder piston, described piston face has plasma spraying nanometer h-bn and the stone of 20-30 μ m thick
Black ene coatings.
2. self-lubricating steam-cylinder piston as claimed in claim 1 is it is characterised in that described coating is nanometer h-bn and Graphene painting
Layer mixes, and its weight ratio is (3-5): 1, preferably 4:1.
3. self-lubricating steam-cylinder piston as claimed in claim 1 or 2 is it is characterised in that described mixing is to adopt planetary ball mill
With centrifugal spraying granulator, coating is dusted, its technique includes:
(1) by nanometer h-bn granule and Graphene ball milling at least 5 minutes on planetary ball mill；
(2), when ball milling stops first 5 minutes, add organic binder ball milling, obtain suspension；
(3) suspension is carried out mist projection granulating, obtain nanometer h-bn and Graphene agglomerated particle.
4. the self-lubricating steam-cylinder piston as described in one of claim 1-3 is it is characterised in that received described by plasma spraying
Rice h-bn is sprayed to Graphene agglomerated particle and obtains described coating on piston face.
5. the self-lubricating steam-cylinder piston as described in one of claim 1-4 is it is characterised in that described plasma spraying, its electric current
For 400-700a, voltage is 30-70v, main gas argon flow amount 50-140l/min, powder feed rate 25-60g/min；Preferably, electricity
Flow for 550a, voltage 30v, argon flow amount 50l/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989045.5A CN106351762A (en) | 2016-11-10 | 2016-11-10 | Self lubricating steam cylinder piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989045.5A CN106351762A (en) | 2016-11-10 | 2016-11-10 | Self lubricating steam cylinder piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106351762A true CN106351762A (en) | 2017-01-25 |
Family
ID=57861773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610989045.5A Pending CN106351762A (en) | 2016-11-10 | 2016-11-10 | Self lubricating steam cylinder piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106351762A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250780A (en) * | 2021-05-21 | 2021-08-13 | 徐工集团工程机械股份有限公司道路机械分公司 | Diesel engine starting device and method based on cold region operation and paver |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724803A (en) * | 2008-10-16 | 2010-06-09 | 北京有色金属研究总院 | Preparation method of composite powder for high-temperature wear-resisting self-lubricating coating |
| CN102168239A (en) * | 2011-03-29 | 2011-08-31 | 北京矿冶研究总院 | Composite powder for abradable seal, coating and preparation method |
| CN102619732A (en) * | 2012-04-24 | 2012-08-01 | 龙口市大川活塞有限公司 | Oil-free automobile air compressor |
| CN104662199A (en) * | 2012-07-23 | 2015-05-27 | 艾默生环境优化技术有限公司 | Anti-wear coatings for compressor wear surfaces |
| CN104846418A (en) * | 2015-04-10 | 2015-08-19 | 南京理工大学 | Preparation technology for dual-pulse electrodeposition based graphene/nickel based composite coating |
| CN105543762A (en) * | 2015-12-28 | 2016-05-04 | 韩功篑 | High-strength environment-friendly wear-resistant coating for inner wall of internal combustion engine cylinder and preparation method of coating |
-
2016
- 2016-11-10 CN CN201610989045.5A patent/CN106351762A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724803A (en) * | 2008-10-16 | 2010-06-09 | 北京有色金属研究总院 | Preparation method of composite powder for high-temperature wear-resisting self-lubricating coating |
| CN102168239A (en) * | 2011-03-29 | 2011-08-31 | 北京矿冶研究总院 | Composite powder for abradable seal, coating and preparation method |
| CN102619732A (en) * | 2012-04-24 | 2012-08-01 | 龙口市大川活塞有限公司 | Oil-free automobile air compressor |
| CN104662199A (en) * | 2012-07-23 | 2015-05-27 | 艾默生环境优化技术有限公司 | Anti-wear coatings for compressor wear surfaces |
| CN104846418A (en) * | 2015-04-10 | 2015-08-19 | 南京理工大学 | Preparation technology for dual-pulse electrodeposition based graphene/nickel based composite coating |
| CN105543762A (en) * | 2015-12-28 | 2016-05-04 | 韩功篑 | High-strength environment-friendly wear-resistant coating for inner wall of internal combustion engine cylinder and preparation method of coating |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250780A (en) * | 2021-05-21 | 2021-08-13 | 徐工集团工程机械股份有限公司道路机械分公司 | Diesel engine starting device and method based on cold region operation and paver |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170125 |