CN203363128U - Structure of cylinder body of high-speed reciprocating piston cylinder - Google Patents
Structure of cylinder body of high-speed reciprocating piston cylinder Download PDFInfo
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- CN203363128U CN203363128U CN 201320483276 CN201320483276U CN203363128U CN 203363128 U CN203363128 U CN 203363128U CN 201320483276 CN201320483276 CN 201320483276 CN 201320483276 U CN201320483276 U CN 201320483276U CN 203363128 U CN203363128 U CN 203363128U
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Abstract
The utility model discloses a structure of a cylinder body of a high-speed reciprocating piston cylinder. The structure comprises a cylinder base body and is characterized in that the inner circle of the cylinder base body is reduced to be an equal-diameter inner circle; a nickel-based tungsten carbide Ni-WC35 ceramic spraying layer is attached on the inner circle of the cylinder base body and is 0.2-0.4 mm in thickness; the size of the inner circle of the ceramic spraying layer is equal to the standard size, required by finish machining, of the inner circle of an original boron cast iron cylinder sleeve. The structure has the advantages thatas follows: the cylinder sleeve is replaced with the nickel-based tungsten carbide Ni-WC35 ceramic spraying layer, the hardness, the corrosion resistance and the wear resistance are improved, the rotary speed reaches up to 4000 r/min, carbon deposits are not produced, and the cost of the ceramic spraying layer is reduced to be 7% of the original boron cast iron cylinder sleeve.
Description
Technical field:
The utility model relates to piston cylinder structure, and particularly a kind of high speed is back and forth moved the structure of piston cylinder cylinder body.
Background technique:
High speed is the piston cylinder of operation back and forth, the piston cylinder that general reference petrol engine, diesel engine, air-compressor piston move back and forth at a high speed in piston cavity.Piston cylinder generally is comprised of cylinder seat, cylinder body, the radiating fin of disjunctor, housing structure generally is comprised of cylinder matrix, cylinder sleeve, the cylinder matrix is sleeve-like, and the cylinder sleeve fit is fixed in cylinder matrix inner circle, cylinder matrix cylindrical and cylinder seat disjunctor several uniform radiating fin that extend.Take 168 petrol engines as example, and the cylinder basic material is aluminium ADC12, and cylinder sleeve and cylinder matrix are isometric, and it is two-way step-like that the cylinder sleeve cylindrical is, and the cylinder sleeve central hole is that piston cavity supplies piston axial reciprocating high speed operation therein.For wear-resisting, piston can not slide with aluminium matter cylinder matrix, so being provided with the cylinder sleeve of boron cast iron material is placed in mould when the die casting piston cylinder once-through by the cylinder sleeve fusion pressure therebetween, for cylinder sleeve axially fixedly positioning, cylinder sleeve cylindrical shape is arranged to the little step column in two broad in the middle.After die casting, cylinder sleeve bore is carried out to finish turning, grinding fine finishing, after fine finishing, the cylinder sleeve wall thickness reaches the 3.5mm left and right, if too thin its mechanical strength of cylinder sleeve can not meet the piston service condition, and a cylinder sleeve fabricating cost has reached 7.3 yuan.
Boron cast iron material hardness is HB220-230, and we have made 720 hours running tests by above-mentioned piston cylinder, and the speed of crankshaft that its highest reciprocal time back and forth driven in other words is up to 3000 rev/mins, and the carbon distribution phenomenon can occur, and rotating speed can't promote again.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned defect, provides a kind of high speed back and forth to move the structure of piston cylinder cylinder body.
Scheme of the present utility model is: comprise the cylinder matrix, it is characterized in that: cylinder matrix inner circle undergauge is isometrical inner circle, cylinder matrix inner circle is attached with the sprayed ceramic layer of one deck tungsten carbide of nickel-base Ni-WC35, the sprayed ceramic layer thickness is 0.2-0.4mm, and sprayed ceramic layer inner circle size equals the size up to standard of former boron cast iron cylinder sleeve inner circle finishing requirements.
The utility model has the advantage of: tungsten carbide of nickel-base sprayed ceramic layer substitutes cylinder sleeve, and hardness, anticorrosive, wear-resisting property raising, make rotating speed up to 4000 rev/mins, and there is no carbon distribution.Sprayed ceramic layer cost drops to 7% of former boron cast iron material cylinder sleeve.
The accompanying drawing explanation:
Fig. 1 is the prior art structural representation.
Fig. 2 is the utility model structural representation.
Embodiment:
Structure of the present utility model is: comprise cylinder matrix 1, it is characterized in that: cylinder matrix 1 inner circle undergauge is isometrical inner circle, cylinder matrix 1 inner circle is attached with the sprayed ceramic layer 3 of one deck tungsten carbide of nickel-base Ni-WC35, sprayed ceramic layer 3 thickness are 0.2-0.4mm, and sprayed ceramic layer 3 inner circle size equal the size up to standard of former boron cast iron cylinder sleeve 2 inner circle finishing requirements.
Processing method is: comprise the piston cylinder die cast, it is characterized in that: during the piston cylinder die cast, cylinder matrix 1 internal diameter is pressed the isometrical hole dimension die casting after undergauge, and after die cast, cylinder matrix 1 inner circle is carried out a procedure finish turning; The self-fluxing alloyed powder supersonic spray gun of packing into is carried out to sprayed ceramic to cylinder matrix inner circle, and the sprayed ceramic material is tungsten carbide of nickel-base Ni-WC35, and the sprayed ceramic temperature is 380-400 ℃, and sprayed ceramic layer 3 thickness are 0.7-1.0mm; Cylinder matrix sprayed ceramic layer 3 inner circle are carried out to two procedure fine finishing, sprayed ceramic layer 3 thickness are remained between 0.2-0.4mm, after two procedure fine finishing, sprayed ceramic layer 3 inner circle size equal the size up to standard of former boron cast iron cylinder sleeve 2 inner circle finishing requirements.
Tungsten carbide of nickel-base Ni--WC35 self-fluxing alloyed powder is as the sprayed ceramic material, and tungsten carbide of nickel-base claims again tungsten titanium-cobalt alloy or YT alloy, the alloy be comprised of Tungsten carbite, titanium carbide and metallic cobalt; Press titanium carbide content, can be divided into high titanium (33%-47%), middle titanium (12%-26%) and low titanium (3%-7%) three class alloys.It has higher oxidative stability than Wc-Co alloys, hardness and wear resistance, and resistance to flexure, impact toughness etc. decreases.X-ray diffraction, energy spectrum analysis and SEM research tungsten carbide of nickel-base self-fluxing alloyed powder flame spray coating, in alloy, the content of Tungsten carbite produces material impact to Organizational Structure, porosity ratio and the hardness of coating, and then makes the high-temperature erosion abrasion mechanism of coating that corresponding the variation occur.With increasing of Tungsten carbite content in coating; it is that the main brittle fracture that changes the Tungsten carbite hard phase into is main that material runs off by the matrix plastic deformation; the Ni of high tenacity (γ) solid solution plays the support protective action to Tungsten carbite, and the hard phase that disperse distributes has improved the wear resistance of coating.Result shows, the Ni-WC35 coating has best high temperature resistance erosion property.
Tungsten carbide of nickel-base compactness is high, hardness is HB350, and than the boron cast iron cylinder sleeve, HB230 is much higher, and friction factor is little, wear-resisting property good, makes the bent axle maximum speed can be up to 4000 rev/mins.
The piston cylinder material is aluminium ADC12, its fusing point is that 560 ℃-600 ℃, softening point are 420 ℃-460 ℃, during for sprayed ceramic, the cylinder matrix is indeformable, the sprayed ceramic temperature will be lower than softening point, we rest in 380-400 ℃, make to spray tungsten carbide of nickel-base and adhere at nearly softening point and inwall, can secure fit after cooling, more capable finish turning, grinding fine finishing.
We have carried out 720 hours comparative trials to two kinds of structures, and former boron cast iron cylinder sleeve 2 structure speeds of crankshaft can only reach 3000 rev/mins, can't promote again, and carbon distribution is many simultaneously.And tungsten carbide of nickel-base sprayed ceramic layer structure speed of crankshaft can reach 4000 rev/mins, there is no carbon distribution simultaneously.Mainly because tungsten carbide of nickel-base hardness is high, compactness is strong, friction factor is little.We equally also made sprayed molybdenum, spray chromium performance test, all because of hardness, compactness, friction factor, less than tungsten carbide of nickel-base, did not reach performance index.These performance index do not reach, the fuel-displaced function reduction of lubricant oil, the poor generation that causes carbon distribution of greasy property.
If same cylinder matrix cast iron, also can implement sprayed ceramic technique, grasp material melting point, softening point, sprayed ceramic temperature and get final product.
Former boron cast iron cylinder sleeve 2 internal grindings require internal diameter size to add the both sides wall thickness retained after 3 fine finishing of sprayed ceramic layer, are the isometrical hole internal diameter size after cylinder matrix 1 internal diameter undergauge.
Because cylinder matrix 1 internal diameter size of all size piston cylinder is different, so during a kind of specification piston cylinder die cast, described cylinder matrix 1 internal diameter is pressed the isometrical hole dimension die casting after undergauge, refers to start to retrodict from the size up to standard of former boron cast iron cylinder sleeve 2 inner circle two procedure finishing requirements.Be in the 0.2-0.4mm thickness after size up to standard will drop on the 3 inner circle fine finishing of sprayed ceramic layer, after a procedure finish turning, size should be and is greater than size up to standard and adds 0.4mm, be less than size up to standard and add in the 0.8mm scope; After an above-mentioned procedure finish turning, size adds before a procedure finish turning while needing reserved size for the piston cylinder die cast the isometrical hole dimension after cylinder matrix internal diameter is by undergauge; Before one procedure finish turning, need reserved dimensional range size to make by oneself because of each enterprise's technique, technical specifications difference.
Claims (1)
1. a high speed is back and forth moved the structure of piston cylinder cylinder body, comprise cylinder matrix (1), it is characterized in that: cylinder matrix (1) inner circle undergauge is isometrical inner circle, cylinder matrix (1) inner circle is attached with the sprayed ceramic layer (3) of one deck tungsten carbide of nickel-base Ni-WC35, sprayed ceramic layer (3) thickness is 0.2-0.4mm, and sprayed ceramic layer (3) inner circle size equals the size up to standard of former boron cast iron cylinder sleeve (2) inner circle finishing requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320483276 CN203363128U (en) | 2013-07-29 | 2013-07-29 | Structure of cylinder body of high-speed reciprocating piston cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320483276 CN203363128U (en) | 2013-07-29 | 2013-07-29 | Structure of cylinder body of high-speed reciprocating piston cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN203363128U true CN203363128U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320483276 Expired - Fee Related CN203363128U (en) | 2013-07-29 | 2013-07-29 | Structure of cylinder body of high-speed reciprocating piston cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398174A (en) * | 2013-07-29 | 2013-11-20 | 福建鑫久铝合金压铸有限公司 | High-speed reciprocating operating piston cylinder body manufacturing method and structure |
-
2013
- 2013-07-29 CN CN 201320483276 patent/CN203363128U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398174A (en) * | 2013-07-29 | 2013-11-20 | 福建鑫久铝合金压铸有限公司 | High-speed reciprocating operating piston cylinder body manufacturing method and structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20160729 |
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| CF01 | Termination of patent right due to non-payment of annual fee |