CN107407227A - Piston and its construction method with sealing cooling duct - Google Patents
Piston and its construction method with sealing cooling duct Download PDFInfo
- Publication number
- CN107407227A CN107407227A CN201680017211.3A CN201680017211A CN107407227A CN 107407227 A CN107407227 A CN 107407227A CN 201680017211 A CN201680017211 A CN 201680017211A CN 107407227 A CN107407227 A CN 107407227A
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- Prior art keywords
- hole
- piston
- containment member
- bottom plate
- methods described
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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
- F02F3/16—Pistons having cooling means
- F02F3/18—Pistons having cooling means the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
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- 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
- F02F3/0015—Multi-part pistons
- F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
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- 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
- F02F3/0015—Multi-part pistons
- F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
- F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Provide a kind of piston and its construction method for explosive motor.The piston has the piston body for including upper and lower part.The top has the upper burning surface for being configured to be directly exposed to the burning gases in cylinder-bore, and with the top inner surface on described below burning surface.The piston body has the ring belt area for being configured for receiving at least one piston ring close to upper burning surface, and is configured to from the radially inner annular cooling channel in ring belt area.Cooling duct has bottom plate, wherein the bottom plate has at least one through hole.Cooling medium is arranged in the cooling channel, and containment member is arranged at least one through hole, by cooling medium sealing in the cooling channel.
Description
The cross reference of related application
This application claims on January 30th, 2015 is submitting, U.S. Provisional Patent Application of Serial No. 62/110,191 and
The priority of U.S. patent Nos application submit, Serial No. 15/011,852 on 2 2nd, 2016, the patent application
It is integrally incorporated herein by reference.
Background technology
1. technical field
The invention mainly relates to explosive motor, more particularly, to piston and its construction method.
2. correlation technique
Manufacturers of engines faces the increasing requirement for improving engine efficiency and performance, includes but is not limited to, changes
Enter fuel economy, improve fuel combustion, reduce fuel consumption and improve delivery temperature so as to followed by the heat of in-car.For
Reach these targets, it is necessary to increase the engine operating temperatures in combustion chamber.However, wanting increase burning indoor temperature
Meanwhile piston must be still maintained at feasible temperature.It is thus known that mode be to combine open and close in piston head
The outer cooling duct and inner cooling channel, machine oil closed reduce the operating temperature of piston head by wherein circulating.Outer cooling duct
Generally around the top land circulation for the piston for including annular groove region, and inner cooling channel is usually located at the upper combustion of piston head
The lower section (being commonly referred to as " in top ") on surface is burnt, it generally includes the combustion bowl of depression.So, ring belt area and burning surface
All benefit from the cooling effect of circulation machine oil.The cooling duct of closing is provided with, it is known that the cooling of closing can be cast
Passage；But the manufacturing process is often costly.
Above-mentioned, associated with the piston with closing cooling duct according to the piston overpowers that build of the present invention is scarce
Point.
The content of the invention
According to one aspect of the present invention, there is provided a kind of piston for explosive motor.The piston includes having
The piston body of upper and lower part, the top have the upper burning table for being configured to be directly exposed to the burning gases in cylinder-bore
Face and the top inner surface below upper burning surface.Piston body has ring belt area, and the ring belt area is configured for accommodating
Close to upper burning surface at least one piston ring, and piston body also have be configured to from the radially inner ring in ring belt area
Shape cooling duct.Cooling duct has bottom plate, wherein the bottom plate has at least one through hole.It is logical that cooling medium is arranged in cooling
In road, and containment member is arranged at least one through hole so that cooling medium to be sealed in the cooling channel.
According to another aspect of the present invention, containment member is the containment member of non-threaded.
According to another aspect of the present invention, containment member is threaded containment member.
According to another aspect of the present invention, containment member can be configured to threaded conical grip, so as to by described in
Containment member is screwed into the conical through-hole of cooling duct bottom plate.
According to another aspect of the present invention, containment member can be fixed to the downside of bottom plate by friction welding (FW) seam.
According to another aspect of the present invention, containment member can be configured to the composition surface with cone, so as to
Form friction welding (FW) seam.
According to another aspect of the present invention, containment member can be provided with rivet form.
According to another aspect of the present invention, containment member has the plastic expansion part of the through hole on closure bottom plate.
According to another aspect of the present invention, containment member can be pressed into through hole.
According to another aspect of the present invention, the periphery that encapsulant can surround containment member is arranged.
According to another aspect of the present invention, encapsulant can be provided with high temperature resistant aerobic sealing material forms.
According to another aspect of the present invention, there is provided a kind of method for building the piston for explosive motor.It is described
Method includes forming piston body, and the piston body has the upper burning for being configured to be directly exposed to the burning gases in cylinder-bore
Surface, and the top inner surface below upper burning surface；Ring belt area is formed, the ring belt area is configured for accommodating
Close at least one piston ring of upper burning surface；Formed from the radially inner annular cooling channel in ring belt area；It is logical in cooling
Through hole is formed on the bottom plate in road；Cooling medium is arranged in the cooling channel by the through hole；And containment member is arranged
To close the through hole in the through hole, and by cooling medium sealing in the cooling channel.
According to another aspect of the present invention, methods described further comprises the sealing that containment member is arranged to non-threaded
Component.
According to another aspect of the present invention, methods described further comprises a part of plastic expansion for making containment member,
To close and seal the through hole on the bottom plate.
According to another aspect of the present invention, methods described further comprises containment member being friction welded to cooling duct
Baseplate underside.
According to another aspect of the present invention, methods described further comprises containment member being arranged to rivet, and makes
The rivet expands in through-holes.
According to another aspect of the present invention, methods described further comprises containment member being arranged to plug, and will
In the plug press-in through hole.
According to another aspect of the present invention, methods described further comprises before the plug is pressed into through hole, encloses
Encapsulant is arranged around the periphery of the plug.
According to another aspect of the present invention, methods described further comprises encapsulant being arranged to resistant to elevated temperatures anaerobism
Encapsulant.
Brief description of the drawings
When described in detail below consideration of the combination to currently preferred embodiment and optimal mode, appended claims and accompanying drawing
When, these and other aspects of the invention, feature and advantage will become more clearly understood from, wherein：
Fig. 1 is the upward view of the piston built according to an aspect of the present invention；
Fig. 2 is sectional view intercepted substantially along line 2-2, piston shown in Fig. 1；
Fig. 3 is the enlarged drawing of encircled 3 shown in Fig. 2；
Fig. 4 A are the front views of the sealing-plug of piston shown in Fig. 1；
Fig. 4 B are the top views of the sealing-plug shown in Fig. 4 A；
Fig. 5 A are view of the sealing plug built according to another aspect of the present invention under pre-assembled state；
Fig. 5 B be analogous to Fig. 5 A, displaying fully-assembled state under sealing plug view；
Fig. 6 A are the front views of the sealing-plug of piston shown in Fig. 5 A and 5B；
Fig. 6 B are the top views of sealing-plug shown in Fig. 6 A；
Fig. 7 A are positive view of the containment member under the installment state of part according to another aspect of the present invention；
Fig. 7 B are positive view of the containment member under complete installment state shown in Fig. 7 A；
Fig. 8 A are positive view of the containment member under non-installment state according to another aspect of the present invention；
Fig. 8 B are the positive view of containment member in the mounted state shown in Fig. 8 A；
Fig. 9 A are positive view of the containment member under non-installment state according to another aspect of the present invention；
Fig. 9 B are the positive view of containment member in the mounted state shown in Fig. 9 A.
Embodiment
Referring more particularly to accompanying drawing, figures 1 and 2 show that the piston built according to the presently preferred embodiment of the present invention
Component, hereinafter referred to as piston 10, it is used in the cylinder-bore of explosive motor or chamber (not shown) move back and forth, such as
Light-duty vehicle diesel engine, intermediate range diesel engine, heavy duty and large aperture diesel engine, and gas engine.Piston
10 have the piston body 12 extended along center longitudinal axis 14, and piston 10 moves back and forth along center longitudinal axis 14 in cylinder-bore.Piston body
12 are formed to include top combustion wall, have upper burning surface 16, the upper quilt of burning surface 16 in the side of the top combustion wall
It is configured for being directly exposed to the burning gases in cylinder-bore, and there is top inner surface in the opposite side of the top combustion wall
18, top inner surface 18 is axially located in burning surface 16 directly below.Piston body 20 is also formed as having close to upper combustion
Burn surface 16 and be configured for receiving at least one from the ring belt area 20 of upper burning surface 16 pendency, wherein ring belt area 20
Individual piston ring (not shown), as is known as.Moreover, piston body 12 is built into annular, closure and sealed
Cooling duct 22, during the working life of piston 10, cooling medium 24 is sealed in cooling duct 22.As example
Unrestricted, cooling duct 22 is shown as annular, and is configured to radially-inwardly and with ring belt area 20 generally diametrically
Alignment.Once cooling medium 24 is arranged in cooling duct 22, cooling duct 22 is just closed by seal 26, and remains
Gas-tight seal cooling duct, thereby it is ensured that cooling medium 24 is accommodated in cooling duct 22, and it is prevented by sealing structure
Part 26 leaks out from cooling duct 22.
Piston body 12 is formed with steel top 28 and steel bottom 30, and top 28 and bottom 30 are by the steel part that separates
It is built-up, and be then fixed to one another by welding procedure, such as induction welding, resistance welding, carrier ray, electron beam weldering
Connect, laser welding, stirring welding, brazing, solder, heat or cold diffusion, and the friction-welding technique shown, but other connect
Technique is closed to be recognized as being within the scope of the present invention.In an illustrated embodiment, the first engagement weld seam 32 makes in a pair of annulars
Rib 34 and 36 is engaged with each other, in addition, the second engagement weld seam 38 extends in ring belt area 20 through outer wall, so that a pair of annulars
External fin 40 and 42 is engaged with each other.
Bottom 30 is dangled from top 28 along center longitudinal axis 14, and to provide a pair of key seats 44, key seat 44 has along pin bore axis 48
Coaxial alignment, spaced pin-and-hole 46, pin bore axis 48 are generally transverse to center longitudinal axis 14 and extended.Key seat 44 is via branch
Support part point 52 is engaged to spaced skirt section 50.Skirt section 50 across the opposite side of pin bore axis 48 diametrically to each other
Separate, and be set for being slidably matched in cylinder-bore with raised outer surface, the profile of the outer surface, so as in work
Plug 10 is held it on desired direction when being moved back and forth through cylinder-bore along axle 14.
Upper burning surface 16 is illustrated as having the combustion bowl 54 of concave type, so as to provide required air-flow for cylinder-bore.
At least partially due to combustion bowl 54, piston is formed between upper burning surface 16, annular cooling channel 22 and top inner surface 18
The region of body material relative thin.So, when in use, these regions are needed by the appropriate cooling of the oil for flowing through cooling duct 22.
According to one aspect of the present invention, by the cooling medium 24 being contained in cooling duct 22, at least partially provide to this
The necessary cooling in region.
In order to when top 28 is bonded into bottom 30, be easy to cooling medium 24 being arranged in cooling duct 22, bottom
30 have the through hole 56 formed on the bottom plate 58 of cooling duct 22, unrestricted as example, such as pass through bore process shape
Into.Through hole 56 can be formed with suitable diameter, and unrestricted according to an example, the diameter is set at about 8 to 10
Between millimeter, and it is formed the through hole of non-threaded.Through hole 56 is shown as being located in the center of one from skirt section 50
At the partially radially inside, general center between pin-and-hole 46, the non-thrust sides in piston 10, reduce then at stress
Region.For the ease of forming through hole 56 in accurate desired locations, when forging or otherwise structure bottom 30, Ke Yi
Identification characteristics are formed on the surface of bottom plate 58, such as depressed part of embossing or punching press unrestricted as example.Then, according to
Another aspect of the present invention, it is arranged into when by the cooling medium 24 of required type and quantity by through hole 56 in cooling duct 22
Afterwards, the cooling duct 22 is completely enclosed and sealed by seal 26, and is limited in cooling duct 22.
According to one aspect of the present invention, as shown in Fig. 4 A to 4B, containment member 26 is arranged to the steel plug of non-threaded
Son.There is plug 26 the post portion of the general cylindrical extended along center longitudinal axis 61 or the head of shank 60 and increase (to be also referred to as
End cap 62).Shank 60 is preferably dimensioned to be diameter of its external diameter (d) less than the through hole 56 on the bottom plate 58 of cooling duct 22, therefore,
When no any externally threaded shank 60 is arranged through through hole 56, it in through hole 56 there is gap to coordinate.So, due to
It is not interference fitted between the external diameter of shank 60 and the periphery of through hole 56, so the tight ness rating between them need not be controlled public
Difference, therefore manufacture efficiency can be realized.For the ease of the positioning shank 60 in through hole 56 and center is placed it in, shank 60 can quilt
Be formed as with chamfered end 64.End cap 62 is formed with flat or substantially flat annular engagement surface 66, and its is big
Axle 61 is transverse on body from shank 60 to stretch out.Composition surface 66 extends radially outward beyond through hole 56, and end cap is thus presented
62 diameter is more than the diameter of through hole 56.Composition surface 66 is the part of containment member 26, its be responsible for and directly formed and bottom
30 secure bond seam.
Before containment member 26 is arranged in into through hole 56 to be closed and to be sealed, as best seen in figure 3, under bottom plate 58
The mating surface 70 of side can be processed into it is straight and flat, it is unrestricted as example, for example pass through spot facing technique.It is close
The composition surface 66 of sealing 26 will be fixed on mating surface 70.In such manner, it is possible to reliably in composition surface 66 and combine table
Good, the reliable, engagement of gas/fluid leakproof is established between face 70.Then, formed it is smooth, after plane mating surface 70,
The shank 60 of containment member 26 is disposed in through hole 56 and coordinated with its gap, and containment member 26 is revolved with sufficiently high rotating speed
Turn driving, combine seam 68 so as to be formed by friction welding (FW), hereafter liquid-proof piece 71 is formed the table of joint from corresponding steel
Face 66 and mating surface 70 extend radially outwardly and extended axially into through hole 56, its by shank 60 in through hole 56 between
Gap coordinates to accommodate.Therefore, between the periphery of through hole 56 and the outer surface of shank 60, liquid-proof piece 71 is freely allowed flow into
Through hole 56, automatically promote to be formed airtight/liquid-tight seal airtightly to seal through hole 56, therefore the bonding that need not be added is situated between
Matter, so as to further improve manufacture efficiency, thus reduce cost.For the ease of being rotated with forming the rotating speed needed for friction welding (FW) seam
Containment member 26 is driven, end cap 62 there can be driving structure 72, for receiving the driving instrument of similar shape, as example
It is unrestricted, it is shown as non-circular, hexagon depression cave portion.It should be appreciated that cave portion 72 can take not as needed
Same non-circular shape, if desired, positive projection can also be formed.
Fig. 5 A-5B and 6A-6B show the containment member 26 ' built according to another aspect of the present invention, and it is used to close
The through hole 56 of the cooling duct 22 of piston (showing partial piston 10), wherein same reference numerals band are extended into sealing
The symbol (' of slash) skew, to represent the similar characteristics of containment member.
Containment member 26 ' is arranged to the steel plug of non-threaded.Plug 26 ' has radially inwardly toward central shaft 61 '
The annular tapered leading edge 60 ' of free end 64 ' is extended to, unrestricted as example, wherein free end 64 ' is shown as somewhat putting down
Smoothization.Tapered leading edge 60 ' is directed radially outward away from the side wall 63 that central shaft 61 ' extends to general cylindrical, and wherein side wall 63 extends
To relative free end 62 '.For ease of to form the rotating speed rotation driving containment member 26 ' needed for friction welding (FW) seam, free end
62 ' can have driving structure 72 ', and unrestricted as example, driving structure 72 ' is shown as serrated face, for accommodating
The driving instrument 73 of sawtooth like.For the ease of placing driving instrument 73, the cave portion of central concave can be formed in free end 62 '
75, so as to the sun projection 77 of the analogous shape that is contained in driving instrument 73.Tapered leading edge 60 ' provide extend radially outwardly it is super
The tapered abutment surface 66 ' of through hole 56 is crossed, thus the diameter of presentation side wall 63 and composition surface 66 ' is more than the diameter of through hole 56.
Composition surface 66 ' is to be responsible for the friction welding (FW) combination seam 68 ' against bottom 30 and direct formed fixation in containment member 26 '
Part.
In assembling, the tapered leading edge 60 ' of containment member 26 ' is disposed in through hole 56, wherein the taper of leading edge cone
Or the shape of frustoconical is easy to that containment member 26 ' is placed in through hole 56 and centered wherein.Then, zigzag work is made
Tool 73 engages with zigzag driving structure 72 ', with sufficiently high rotating speed rotation driving containment member 26 ', so as to pass through friction welding (FW)
Connect to be formed with reference to seam 68 '.Then, due to the material molten of bottom plate 58 so that containment member 26 ' sinks to the material of bottom plate 58
In, wherein the liquid-proof piece 71 ' for melting, solidifying and being hardened is formed from corresponding steel composition surface 66 ' and mating surface 70
Extend radially outwardly and extend axially inwardly into through hole 56, this helps to form strong, airtight/liquid-tight seal, with airtight
Ground seals through hole 56, therefore the bond medium that need not be added, and manufacture efficiency is thus also improved, so as to reduce cost.It should see
Arrive, the melt material of bottom plate 58 and containment member 26 ' can be made, be consequently formed fusing, the alloy of the material solidified, this causes by force
, the combination seam being hardened.
Shown on Fig. 7 A and 7B according to another aspect of the present invention build containment member 126, its be used for close and it is close
Envelope extends into the through hole 156 of the cooling duct 122 of piston (display portion piston 110), wherein same reference numerals skew 100
The factor identify similar characteristics.Piston body 112 be built as it is substantially the same with the discussion above with respect to piston body 12, therefore
It is believed that repeated description piston body 112 is unnecessary.
Containment member 126 is arranged to rivet type component, and it has the shaft of rivet 74 and rivet actuation component, also referred to as rivet
Mandrel 76.Therefore rivet type containment member 126 is actuated in a manner of with conventional rivets identical, from the first pre-mounted state (figure
7A) it is moved to expansion, plastic deformation the second installment state (Fig. 7 B).During installation, the shank 78 of the shaft of rivet 74 is with light
Micro- gap, which coordinates, to be inserted into the through hole 156 of non-threaded, and hereafter, a part for shank 78 extends up to cooling duct 122
In, making diameter bigger than through hole 156, the cap of expansion or first 79, then, suitable rivet actuates against the downside of bottom plate 158
Instrument (not shown) catches the free end of exposure dangled from bottom plate 158, rivet mandrel 76, to be pulled relative to the shaft of rivet 74
Rivet mandrel 76, as known when disposing rivet, thus make the part plastic deformation of the shank 78 of the shaft of rivet 74 and swollen
It is swollen, and be forever interference fitted with the periphery of through hole 156 and the upper surface of bottom plate 158, so as to hermetically close through hole 156.If
Need, for the ease of forming airtight/liquid-tight seal after shank 78 is plastically deformed to its expanded form, it may be considered that by rivet
Body 74 is arranged into before through hole 156, and the shank 78 around the shaft of rivet 74 arranges high temperature resistant aerobic sealing material 82.
The containment member 226 built according to another aspect of the present invention is shown on Fig. 8 A and 8B, it is used to close extension
To the through hole 256 in the cooling duct 222 of piston (display portion piston 210), wherein identical reference offsets 200 factors
It is used to identify similar characteristics.The discussion that piston body 212 is built into for piston body 12 with more than is substantially the same, therefore evidence
Believe that the repeated description piston body is unnecessary.
Containment member 226 is arranged to the plug of cup.During installation, by being received in the open end of plug 226
And the suitable installation tool 80 of the open end of plug 226 is pressed against, the blind end of plug 226 is pressed into through hole to be interference fitted
In 256, so as to hermetically close through hole 256.Preferably, for the ease of forming airtight/liquid-tight seal, arranged plug 226
Before into through hole 256, high temperature resistant aerobic sealing material 282 is arranged in the periphery 84 for being first about plug 226.Plug 226 can quilt
Be formed as that there is any suitable diameter, in the case where considering the material and wall thickness (t) of plug 226, to be carried in through hole 256
For required interference fit.
The containment member 326 built according to another aspect of the present invention is shown on Fig. 9 A and 9B, it is used to close and sealed
The through hole 356 for the cooling duct 322 for extending to piston (display portion piston 310) is closed, wherein same reference numerals offset 300
The factor is used to identify similar characteristics.Piston body 312 is built into more than for the substantially the same of the discussion of piston body 12, because
This is it is believed that repeated description piston body 312 is unnecessary.
Cone seal component 326 is arranged to the threaded component of taper, has taper, with externally threaded shank 360.
During installation, the threaded shank 360 of taper is threaded into the taper of matching, tapped through hole 356, hermetically to close
Close the threaded through hole 356 of taper.Threaded shank 360 and the matching gradient of the taper of threaded through hole 356 are automatic
Cause containment member 326 to be driven to the depth of setting, and prevent containment member 326 by undue driving to passing completely through through hole
356.Preferably, it is threaded logical threaded shank 360 is threaded into for the ease of forming airtight/liquid-tight seal
Before hole 356, periphery arrangement high temperature resistant aerobic sealing material 382 of threaded shank 360 is first about.For the ease of that can revolve
Turn ground to drive containment member 326 in threaded through hole 356, the end 361 of containment member 326 there can be driving structure
372 to receive the driving instrument of analogous shape, unrestricted as example, is shown as non-circular, hexagon depression on figure
Cave portion.It should be appreciated that as discussed above, cave portion 372 can take different non-circular shapes as needed, if
If needing, positive projection can also be formed.According to one aspect of the present invention, the threaded shank 360 of taper is by screw thread
The threaded through hole 356 of taper is screwed into moment of torsion between 18-22Nm, find its with 382 groups of high temperature resistant aerobic sealing material
During conjunction, through hole 356 most preferably can be closed and sealed in the expectation life period of piston 310.
Obviously, in view of the teaching of the above, many amendment schemes of the invention and variation are all possible.Therefore, should
Understand, within the scope of the appended claims, the mode that the present invention can be differently configured from specific descriptions is implemented.
Claims (21)
1. a kind of piston for explosive motor, it is characterised in that the piston includes：
Piston body, the piston body include limiting the upper and lower part of annular cooling channel, and the top, which has, to be configured to directly
Meet the upper burning surface of the burning gases in cylinder-bore and the top inner surface on described below burning surface, and institute
Stating top has from the radially outer ring belt area of the annular cooling channel, the bottom offer annular cooling channel
Bottom plate and a pair of key seats from bottom plate pendency, the key seat has axially aligned pin-and-hole, and the bottom plate has extremely
A few through hole；
Cooling medium, the cooling medium are disposed in the annular cooling channel；And
Containment member, the containment member seal the through hole and the cooling medium are sealed in the cooling duct.
2. piston according to claim 1, it is characterised in that the containment member is swollen by the plasticity of the containment member
One of swollen part or friction welding (FW) seam are fixed to the bottom plate.
3. piston according to claim 2, it is characterised in that the containment member sews friction by the friction welding
It is welded to the downside of the bottom plate.
4. piston according to claim 3, it is characterised in that the containment member, which has, is friction welded to the bottom plate
Downside conical surface.
5. piston according to claim 2, it is characterised in that wherein described containment member is the rivet of expansion.
6. piston according to claim 1, it is characterised in that the piston further comprises around the containment member
The encapsulant of periphery arrangement.
7. piston according to claim 1, it is characterised in that the through hole is formed on the non-pusher of the piston body
Side.
8. piston according to claim 7, it is characterised in that the through hole is formed as substantially between the key seat.
9. piston according to claim 1, it is characterised in that the containment member, which has, is threaded into the through hole
Threaded shank.
10. piston according to claim 9, it is characterised in that wherein described threaded shank is taper, and institute
It is also taper to state through hole.
11. piston according to claim 9, it is characterised in that the piston also includes surrounding the threaded shank
Periphery arrangement encapsulant.
A kind of 12. method for building the piston for explosive motor, it is characterised in that methods described includes：
Piston body is formed, the piston body has the upper burning surface for being configured to be directly exposed to the burning gases in cylinder-bore
With the top inner surface on described below burning surface；
Ring belt area is formed, the ring belt area is configured for receiving at least one piston close to the upper burning surface
Ring；
Being formed from the radially inner annular cooling channel in the ring belt area, the annular cooling channel has bottom plate；
Through hole is formed on the bottom plate of the cooling duct；
Cooling medium is arranged in the cooling channel by the through hole；And
Containment member is arranged in the through hole, so as to which the cooling medium is sealed in the cooling duct.
13. according to the method for claim 12, it is characterised in that methods described further comprises rubbing the containment member
Wipe the downside for the bottom plate for being welded to the cooling duct.
14. according to the method for claim 13, it is characterised in that methods described, which further comprises providing, has conical gradual change
The containment member on surface, and the mantle friction of the conical gradual change is welded to the downside of the bottom plate.
15. according to the method for claim 12, it is characterised in that methods described further comprises setting the containment member
Rivet is set to, and the rivet is expanded in the through hole.
16. according to the method for claim 12, it is characterised in that methods described further comprises setting the containment member
Plug is set to, and the plug is pressed onto in the through hole.
17. according to the method for claim 16, it is characterised in that methods described further comprises being pressed onto by the plug
Before in the through hole, encapsulant is arranged around the periphery of the plug.
18. according to the method for claim 12, it is characterised in that methods described further comprises in the non-of the piston body
Thrust sides form the through hole.
19. according to the method for claim 12, it is characterised in that methods described further comprises setting the containment member
It is set to threaded shank, and the threaded shank threads is screwed into the through hole.
20. according to the method for claim 19, it is characterised in that methods described further comprises setting the containment member
The threaded shank with taper is set to, forms the through hole with the taper to match with the threaded shank, and
The threaded shank threads of the taper are screwed into the through hole of the taper.
21. according to the method for claim 20, it is characterised in that methods described further comprises will be described threaded
Before shank threads are screwed into the through hole, encapsulant is arranged around the periphery of the threaded shank.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562110191P | 2015-01-30 | 2015-01-30 | |
| US62/110,191 | 2015-01-30 | ||
| PCT/US2016/015906 WO2016123601A1 (en) | 2015-01-30 | 2016-02-01 | Piston with sealed cooling gallery and method of construction thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107407227A true CN107407227A (en) | 2017-11-28 |
Family
ID=60185932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680017211.3A Pending CN107407227A (en) | 2015-01-30 | 2016-02-01 | Piston and its construction method with sealing cooling duct |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3250806B1 (en) |
| CN (1) | CN107407227A (en) |
| PL (1) | PL3250806T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443417A (en) * | 2019-09-03 | 2021-03-05 | 马勒国际有限公司 | Piston |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1953109A (en) * | 1931-11-07 | 1934-04-03 | Sam D Heron | Piston |
| US20110267080A1 (en) * | 2006-02-17 | 2011-11-03 | Hedges Joe D | Remote Oil Monitoring System |
| US20130146017A1 (en) * | 2011-12-08 | 2013-06-13 | Federal-Mogul Corporation | One-Piece Piston With Improved Combustion Bowl Rim Region and Method of Manufacture |
| WO2014071274A1 (en) * | 2012-11-02 | 2014-05-08 | Federal-Mogul Corporation | Piston with a cooling gallery partially filled with a thermally conductive metal-containing composition |
| CN103890364A (en) * | 2011-09-20 | 2014-06-25 | 马勒国际公司 | Piston for an internal combustion engine and method for producing same |
-
2016
- 2016-02-01 EP EP16706278.5A patent/EP3250806B1/en active Active
- 2016-02-01 PL PL16706278T patent/PL3250806T3/en unknown
- 2016-02-01 CN CN201680017211.3A patent/CN107407227A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1953109A (en) * | 1931-11-07 | 1934-04-03 | Sam D Heron | Piston |
| US20110267080A1 (en) * | 2006-02-17 | 2011-11-03 | Hedges Joe D | Remote Oil Monitoring System |
| CN103890364A (en) * | 2011-09-20 | 2014-06-25 | 马勒国际公司 | Piston for an internal combustion engine and method for producing same |
| US20130146017A1 (en) * | 2011-12-08 | 2013-06-13 | Federal-Mogul Corporation | One-Piece Piston With Improved Combustion Bowl Rim Region and Method of Manufacture |
| WO2014071274A1 (en) * | 2012-11-02 | 2014-05-08 | Federal-Mogul Corporation | Piston with a cooling gallery partially filled with a thermally conductive metal-containing composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443417A (en) * | 2019-09-03 | 2021-03-05 | 马勒国际有限公司 | Piston |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3250806B1 (en) | 2022-03-23 |
| EP3250806A1 (en) | 2017-12-06 |
| PL3250806T3 (en) | 2022-06-13 |
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