CN107606148A - A kind of pressurized crankcase of no oily piston - Google Patents
A kind of pressurized crankcase of no oily piston Download PDFInfo
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- CN107606148A CN107606148A CN201710876416.3A CN201710876416A CN107606148A CN 107606148 A CN107606148 A CN 107606148A CN 201710876416 A CN201710876416 A CN 201710876416A CN 107606148 A CN107606148 A CN 107606148A
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- connecting rod
- crankcase
- cylinder
- pin
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000010791 quenching Methods 0.000 claims abstract description 24
- 230000000171 quenching effect Effects 0.000 claims abstract description 24
- 238000005255 carburizing Methods 0.000 claims abstract description 19
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 14
- 239000010936 titanium Substances 0.000 claims abstract description 14
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 14
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 6
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- 238000005266 casting Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims 1
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- 230000000694 effects Effects 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 8
- 230000006872 improvement Effects 0.000 description 6
- 239000010721 machine oil Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 241001125879 Gobio Species 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 4
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- 239000003921 oil Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention relates to a kind of pressurized crankcase of no oily piston, solution be present in prior art between piston and rings tightness it is bad and cause the situation of gas leakage, stress is excessive in the middle part of piston pin and deform fracture and the too low technical problem of the perishable rigidity of connecting rod.By providing a kind of new pressurized crankcase without oily piston, outer surface of piston has ring-shaped groove, and piston and rings are connected by groove；Gudgeon pin bore is shaped as two hollow cylinders divided equally, and two hollow cylinders are formed by heavy wall cylinder isolation；Connecting rod outer surface elder generation carburizing and quenching, then last layer titanium layer and nickel dam are plated successively.The invention has the characteristics of rigidity for preventing gas from scurrying into crankcase, reinforcement connecting rod and piston pin by piston, the manufacturing that can largely go into operation with automotive engine applications.
Description
Technical field
The present invention relates to engine art, and in particular to a kind of pressurized crankcase of no oily piston.
Background technology
The engine indoor gas that burns in the course of the work inevitably will scurry into crankcase from piston ring, its mainly into
Dividing includes spent gas, unburned gas and vapor etc., and this can dilute machine oil, reduce the performance of machine oil, add
Fast machine oil is aoxidized, gone bad, and condensation of moisture is in machine oil, can form greasy filth, clogged oil line, and the sour gas in waste gas mixes
Enter lubricating system, the corrosion and accelerated wear test of engine part can be caused.Gas blowby can also make the hypertonia of crankcase and destroy
The sealing of crankcase, is lost in engine oil leakage, and influences overall performance and reliability, due to substantial amounts of machine oil in crankcase be present
Drop, crankcase can be discharged together with engine blow-by gas, so as to cause oil consumption to increase and pollute environment, therefore it is necessary
Strengthen the sealing control of crankcase.
Piston pin is installed in the cylindrical peg of piston skirt, for connecting piston and connecting rod, and the power that piston is born
It is transmitted to connecting rod or plays counter force.The middle part of piston pin passes through connecting rod small end hole, and for connecting piston and connecting rod, it is acted on
It is that the gas load that piston is born is transmitted to connecting rod, or small end of connecting rod band piston is moved together.Because piston pin is in pin
Swing angle is little in hole, it is difficult to forms lubricating oil film, therefore lubricating condition is poor, must have for this piston pin enough firm
Degree, intensity and wearability, quality is as small as possible, and pin should have appropriate fit clearance and good surface quality with pin-and-hole, because
This in general, the rigidity of piston pin is particularly important.Piston pin is primarily present problems with the prior art：1st, it is usually
Mitigation weight, be generally made into it is hollow, but in real life, and because moment of flexure suffered by piston pin in the middle most
Greatly, close to the beam of uniform strength, therefore in the middle part of piston pin, stress is excessive easily occurs bending and deformation, and may damage piston boss；
2nd, it is that the usual quality of solid piston pin is larger to be fabricated to, and the angle swung when piston pin moves in pin-and-hole and little, this
It is insensitive that sample may result in piston pin motion；3rd, piston pin will bear very big periodic shock load under the high temperature conditions, but
Be piston pin at this stage material rigidity, intensity and wearability it is far from enough.
Connecting rod connects piston and bent axle, and active force suffered by piston is transmitted into bent axle, and the reciprocating motion of piston is changed into
The rotary motion of bent axle.Connection rod set bears the gas load and itself swing and the reciprocal inertia of piston group that piston pin transmits
The effect of power, the size and Orientation of these power is all periodically variable, therefore connecting rod is by alternations such as larger compression, stretchings
Load acts on.Connecting rod must have enough fatigue strength and the rigidity of structure.Fatigue resistance is too low, often cause connecting rod shank or
Connecting-rod bolts are broken, and then produce the major accident that complete machine is destroyed；Rigidity is too low, and shaft flexural deformation and connecting rod can be caused big
The mistake circle deformation of head, cause the eccentric wear of piston, cylinder, bearing and crank-pin etc..Connecting rod mainly has problems with the prior art：
1st, rigidity is inadequate；2nd, fatigue resistance is inadequate.
The content of the invention
The present invention is excessive for stress in the middle part of piston pin present in prior art and deform fracture, piston and piston
Tightness is bad and cause the situation of gas leakage and the too low technological deficiency of the perishable rigidity of connecting rod, the present invention to pass through between ring
There is provided a kind of new pressurized crankcase without oily piston, the invention has and prevents gas from scurrying into crankcase by piston, prevents from living
The bending moment force being subject in the middle part of plug pin is excessive and deforms and strengthens the technical characteristic of connecting rod rigidity.
In order to solve the above technical problems, the technical scheme used is as follows：
A kind of pressurized crankcase of no oily piston, including crankcase, piston group and cylinder, the crankcase are divided into bent axle
Case and lower crankcase, upper crankcase are connected as an entirety with cylinder casting, linear reciprocation fortune are carried out between piston group and cylinder
Dynamic, the piston group includes piston, piston ring, piston pin, connecting rod, and the connecting rod includes connecting rod small end hole, shaft, and connecting rod is big
Head, connecting rod bearing shell and connecting-rod bolts, the connecting rod small end hole are socketed on piston pin, and big end passes through connecting rod with connecting rod bearing shell
Bolt connection；The connecting rod outer surface elder generation carburizing and quenching, then last layer titanium layer nickel dam is plated successively；The piston is on annular surface
Provided with the ring-shaped groove vertical with piston axis, the piston for being bonded with cylinder inner wall and reaching sealing effectiveness is provided with ring-shaped groove
Ring；The piston pin is three stage structure, including the hollow cylinder and a heavy wall cylinder that two sections are divided equally.
The operation principle of the present invention：The cylinder block and upper crankcase of engine are cast as an entirety, the circle on cylinder block top
Cylinder cavity is cylinder, lower half for support bent axle crankcase, piston be in cylinder block in the parts that move reciprocatingly, make
With the combustion pressure being subject in cylinder, and this power is transmitted to bent axle by piston pin and connecting rod, piston ring can ensure piston
Sealing between cylinder wall, prevent the high-temperature high-pressure fuel gas in cylinder from largely scurrying into crankcase, extend machine oil useful life, subtract
Parts depreciation and corrosion are lacked；The power that connecting rod receiving piston is transmitted by piston pin, then power is transmitted to bent axle, band dynamic crankshaft turns
It is dynamic, the linear reciprocating motion of piston is changed into the rotary motion of bent axle, this just proposes very high requirement to the rigidity of connecting rod,
Carburizing and quenching processing is carried out on surface, it is possible to the hardness and rigidity of connecting rod are greatly improved, then last layer titanium and nickel are plated on surface,
Stability and decay resistance can also be increased；The piston pin Moment that middle part is subject in motion process is maximum, in piston
The middle part welding last layer heavy wall cylinder of pin can increase service life with force balance point.
Further, the piston ring is compression ring, and compression ring can be used to the burning mixture in sealing combustion room.
Further, have one layer of soft silica gel sealing ring in the ring-shaped groove of the piston ring and piston contact, piston with
When piston ring forms threaded connection, its sealing is increased.
Further, the heavy wall cylinder and piston pin shell are by being formed by welding integral structure.
Further, the internal diameter of the piston pin is D, a diameter of D of heavy wall cylinder, thickness 0.2-0.4D.
Further, the connecting rod is low-alloy steel or modulation steel.
Further, the carburizing and quenching treatment temperature is 900-1000 degrees Celsius.
Further, the titanium layer is 40-80 nanometers, and the nickel dam is 40-100 nanometers.
Further, the heavy wall cylinder is 45 steel.
Beneficial effects of the present invention：
Effect one, inventive piston pin include the hollow cylinder and a heavy wall cylinder that two sections are divided equally, the welding of heavy wall cylinder
At the middle part of gudgeon pin bore.Piston is primarily subjected to the active force of burning gases, and this power is passed into connecting rod by piston pin
To promote bent axle to rotate, therefore the Moment power suffered by piston pin is maximum at middle part, close to the beam of uniform strength, however it is traditional
Piston pin mostly uses hollow-core construction, discontinuity, and stress is excessive in the middle part of piston pin easily occurs bending and deformation, and is easily deformed
Bending；Pyramidal structure also is used inside piston pin, not only increases quality, and pyramidal structure also proposes to interconnection technique
Higher requirement, the Moment power that a thickness wall cylinder balances middle part is welded in the middle part of piston pin；45 steel materials are lighter,
Will not the excessive total quality for aggravating piston pin；
Effect two, inventive piston outer surface set one layer of ring-shaped groove, piston ring are connected with piston by groove so that knot
Structure is firm compact, also sets one layer of soft silica gel sealing gasket in ring-shaped groove so that positive confinement is played between piston and rings
Effect；Soft silica gel sealing gasket need to be only regularly replaced when safeguarding, and no longer needs frequently to change piston or piston ring, significantly
Cost is saved, it is simple and easy to do；
Effect three, the present invention first carry out carburizing and quenching processing to connecting rod, and it is very high that it can obtain the rod surface for oozing carbon
Hardness, its rub proofness and the rigidity of structure are improved, is increased the service life；Last layer titanium layer and nickel are plated successively in rod surface again
Layer, strengthens the corrosion resistance of connecting rod, high rigidity, anti-sassafras, does not peel off, colour-fast, height anti-corrosion, and not by ultraviolet shadow
Ring；
Effect four, the present invention are welded in the connected mode of piston pin and heavy wall cylinder using argon arc welding, high-temperature fusion weldering
Argon gas is constantly served in connecing, prevents wlding from being contacted with the oxygen in air, so as to prevent the oxidation of wlding, table after welding
Face is smooth, neat, and device is unlikely to deform.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is piston pin structural representation；
Fig. 3 is connecting rod overall structure diagram；
Fig. 4 is connecting rod coating schematic diagram.
Such as figure：
1- pistons, 2- piston rings, 3- piston bosses, 4- piston pins, 5- connecting rods, 6- connecting rod bearing shells, 7- connecting-rod bolts, 8- connecting rods
Lid, 9- heavy wall cylinders, 10- hollow cylinders, 11- nickel dams, 12- titanium layers；
51- connecting rod small end holes, 52- shafts, 53- big ends.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to limit only to explain the present invention
The fixed present invention.
Embodiment 1
The present embodiment provides a kind of pressurized crankcase of no oily piston, including crankcase, piston group and cylinder, the crankcase
Body is divided into upper crankcase and lower crankcase, and upper crankcase links together with cylinder casting, and lower half is the bent axle of support bent axle
Case, its inner chamber are the spaces of Crankshaft motion；Such as Fig. 1, piston group can carry out straight reciprocating motion, the piston group in cylinder
Formed including piston 1, piston ring 2, piston pin 4, connecting rod 5 and connecting rod bearing shell 6.Piston 1 is primarily subjected to from burning gases
Active force, and this power is connected into upper piston pin 4 by piston boss 3 and passes to connecting rod 5 to promote bent axle to rotate, piston pin 4 is logical
Cross the piston boss 3 being fixedly mounted on piston 1 to be formed by connecting, the top of piston 1 also collectively forms combustion with cylinder cover, cylinder wall
Room is burnt, therefore it is required that excellent thermal conductivity, wear resistant corrosion resistant；The piston ring 2 of the present invention selects compression ring, it is ensured that accomplishes to live
The sealing of plug 1 and cylinder wall, prevents the high-temperature high-pressure fuel gas in cylinder from largely scurrying into crankcase；Piston pin 4 is in small end of connecting rod copper
Slowly rotated in bushing and in the pin-and-hole of piston, connect piston 1 and connecting rod 5, the power that piston is subject to are transmitted to connecting rod 5；Connecting rod 5 is logical
Cross piston pin 4 with bent axle to be connected, receiving piston pin 4 is transmitted through the active force of piston 1 come, Crankshaft motion is promoted, just by piston 1
Linear reciprocating motion is changed into the rotary motion of bent axle, and connecting rod typically by connecting rod small end hole 51, shaft 52, big end 53 and connects
Rod bearing lid forms；Connecting rod bearing shell 6 connects big end 53 and connecting rod cap 8 by connecting-rod bolts 7, and work is welded with the piston
Plug pin seat 3, the middle part of piston pin 4 are connected through the 51 small head bore of connecting rod on connecting rod 5, connecting rod bearing shell 6 by bolt with connecting rod 5；
There is ring-shaped groove the outer surface of piston 1, and piston 1 is connected with piston ring 2 by groove.
As a further improvement, one layer of soft silica gel seals outside the piston and in the ring-shaped groove of piston contact
Circle, connected by groove between piston and rings 2, can play a part of sealing to a certain extent, but usage time
Its sealing can not be ensured if long.Therefore one layer of soft silica gel sealing ring is installed in ring-shaped groove, it is ensured that it is sealed
Insulating, only need when cleaning to change soft silica gel sealing ring, it is not necessary to do other replacings again.Low-alloy steel
Plasticity is strong, and the intensity of steel is very big, has good atmospheric corrosion resistance.
Preferably, the piston ring 2 is compression ring, and compression ring can be used to the burning mixture in sealing combustion room, according to
By the pressure differential of gas or liquid, sealing is formed between ring periphery and a side of cylinder and ring and annular groove.
Piston pin is installed in the cylindrical peg of piston boss 3, and the middle part of piston pin passes through connecting rod small end hole 51, for even
Take over a job plug and connecting rod, its effect is that the gas load that piston 1 is born is transmitted to connecting rod 5, or make connecting rod small end hole 51 drive work
Plug moves together, and the present embodiment the operation sensitivity of oversize piston pin 4, piston pin is made to mitigate overall structure weight
Hollow cylinder.
As a further improvement, if Fig. 3, the material of connecting rod 5 are low-alloy steel, the surface of connecting rod 5 is oozed first
Carbon quenches, and carburizing and quenching treatment temperature is 900 degrees Celsius, so can be obtained by higher wearabilities of the big ﹑ of case hardness and tired
Labor Qiang Du ﹐ have the Qiang Ren ﹐ after mild steel quenching workpiece is born bigger rush in the middle part of the connecting rod after carburizing and quenching
Load is hit, connection rod set bears gas load and itself swing and the effect of piston group reciprocal inertia force that piston pin transmits,
The size and Orientation of these power be all it is periodically variable, therefore connecting rod alternate load effect, the connecting rod such as compressed, stretched must
Enough fatigue strength and the rigidity of structure must be ensured.Fatigue strength deficiency, often causes shaft 52 or connecting-rod bolts 7 to be broken,
And then produce the major accident that complete machine is destroyed；If insufficient rigidity, the flexural deformation of shaft 52 and the mistake of big end 53 can be caused
Circle deformation, cause the eccentric wear of piston, cylinder, bearing and crank-pin etc.；
Preferably, such as Fig. 4, the titanium layer 12 is 40 nanometers, and the nickel dam 11 is 40 nanometers.Connecting rod 5 is by after carburizing and quenching
After carburizing and quenching, titanium then is plated on surface, is then electroplating last layer nickel, strengthens the stability of connecting rod and corrosion-resistant
Property.The payload that the present invention obtains after 1000 experiment tests is 20000-28000N.
Embodiment 2
The difference of embodiment 2 and embodiment 1 is：Such as Fig. 2, as a further improvement, the heavy wall cylinder 9 and piston pin
Shell is shaped as two hollow cylinders divided equally by being formed by welding integral structure, the gudgeon pin bore, and two hollow
Cylinder is isolated by a heavy wall cylinder 9 to be formed, cylinder inner diameter D, and the thickness of heavy wall cylinder 9 is 0.2D, the piston
The heavy wall cylinder 9 of pin endoporus is formed with piston pin by argon arc welding.Piston pin small volume itself, heavy wall cylinder 9
Welding just needs more accurate welding technique, and argon gas protective gas is led to around arc welding, by air insulated welding zone it
Outside, the oxidation of welding zone is prevented；Heavy wall cylinder 9 and piston pin shell are welded together simultaneously, so processing is achieved that only
On the premise of adding very light quality, it is possible to reduce Moment well, extend the service life of piston pin.
As a further improvement, the connecting rod material is low-alloy steel, carries out carburizing and quenching to rod surface first, oozes
Carbon Quenching Treatment temperature is 900 degrees Celsius, so can be obtained by the higher wearabilities of the big ﹑ of case hardness and tired labor spends by force ﹐ warps
There are the Qiang Ren ﹐ after mild steel quenching workpiece is born bigger shock loading in the middle part of connecting rod after over carburizing quenching, even
Bar group is born the gas load that piston pin transmits and itself swung and the effect of piston group reciprocal inertia force, these power it is big
Small and direction is all periodically variable, therefore connecting rod alternate load effect, the connecting rod such as is compressed, stretched and must assure that enough
Fatigue strength and the rigidity of structure.Fatigue strength deficiency, often causes connecting rod shank or connecting-rod bolts 7 to be broken, and then produces whole
The major accident that machine destroys；If insufficient rigidity, the flexural deformation of shaft 52 and the mistake of big end 53 can be caused to justify deformation, caused
The eccentric wear of piston, cylinder, bearing and crank-pin etc.；
Preferably, the titanium layer 12 is 60 nanometers, and the nickel dam 11 is 70 nanometers.Connecting rod is by carburizing and quenching afterwards through over carburizing
After quenching, titanium then is plated on surface, last layer nickel is then being electroplated, is strengthening the stability and corrosion resistance of connecting rod.This hair
The bright payload obtained after 1000 experiment tests is 35000-40000N.
Embodiment 3
The difference of embodiment 3 and embodiment 1 is：As a further improvement, the heavy wall cylinder 9 leads to piston pin shell
Cross and be formed by welding integral structure, the gudgeon pin bore is shaped as two hollow cylinders divided equally, two hollow cylinders
Isolated by a heavy wall cylinder 9 and form, cylinder inner diameter D, the thickness of heavy wall cylinder 9 is 0.4D, the gudgeon pin bore
Heavy wall cylinder 9 formed with piston pin by argon arc welding.Piston pin small volume itself, the welding of heavy wall cylinder 9 is just
More accurate welding technique is needed, argon gas protective gas is led to around arc welding, by air insulated outside welding zone, is prevented
The oxidation of welding zone；Simultaneously by the middle part of the welding piston pin endoporus of heavy wall cylinder 9, so handle be achieved that merely add it is lighter
Quality on the premise of, it is possible to reduce Moment well, extend the service life of piston pin.
As a further improvement, the connecting rod material is low-alloy steel, carries out carburizing and quenching to the surface of connecting rod 5 first,
Carburizing and quenching treatment temperature is 1000 degrees Celsius, so can be obtained by the higher wearabilities of the big ﹑ of case hardness and tired labor spends by force ﹐
The middle part of connecting rod 5 after carburizing and quenching has the Qiang Ren ﹐ after mild steel quenching workpiece is born bigger shock loading,
Connection rod set bears gas load and itself swing and the effect of piston group reciprocal inertia force that piston pin transmits, these power
Size and Orientation is all periodically variable, therefore connecting rod alternate load effect, the connecting rod such as is compressed, stretched and must assure that foot
Enough fatigue strength and the rigidity of structure.Fatigue strength deficiency, often causes 52 shafts or connecting-rod bolts 7 to be broken, and then produces
The major accident that complete machine is destroyed；If insufficient rigidity, the flexural deformation of shaft 52 and the mistake of big end 53 can be caused to justify deformation, led
The eccentric wear of activation plug, cylinder, bearing and crank-pin etc.；
Preferably, the titanium layer 12 is 80 nanometers, and the nickel dam 11 is 100 nanometers.Connecting rod oozes by passing through after carburizing and quenching
After carbon quenching, titanium then is plated on surface, last layer nickel is then being electroplated, is strengthening the stability and corrosion resistance of connecting rod.This
The payload that invention obtains after 1000 experiment tests is 39000-44000N.
In the description of the invention, it is to be understood that term " interior ", " dividing equally ", " middle part ", " outer surface ", " on ",
The orientation or position relationship of the instruction such as " other end ", " both ends ", " bottom ", " lower section " are based on orientation shown in the drawings or position
Relation is put, it is of the invention necessary with simplified description, rather than the device or element of instruction or hint meaning to be for only for ease of description
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, the term such as term " setting ", " connection ", " installation " should
It is interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can mechanically connect,
It can be electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be the company of two element internals
Logical or two elements interaction relationship, limited unless otherwise clear and definite.For the ordinary skill in the art, may be used
To understand the concrete meaning of above-mentioned term in the present invention as the case may be.
Although the illustrative embodiment of the present invention is described above, in order to the technology of the art
Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the scope of embodiment, to the common skill of the art
For art personnel, as long as long as various change in the spirit and scope of the invention that appended claim limits and determines, one
The innovation and creation using present inventive concept are cut in the row of protection.
Claims (10)
1. a kind of pressurized crankcase of no oily piston, including crankcase, piston group and cylinder, the crankcase are divided into song
Axle box and lower crankcase, upper crankcase are connected as an entirety with cylinder casting, and piston group carries out linear reciprocation fortune in cylinder
It is dynamic, it is characterised in that the piston group includes piston（1）, piston ring（2）, piston pin（4）, connecting rod（5）, the connecting rod（5）Bag
Include connecting rod small end hole（51）, shaft（52）And big end（53）, the connecting rod small end hole（51）It is socketed in piston pin（4）On,
Big end（53）With connecting rod bearing shell（6）Pass through connecting-rod bolts（7）Connection；The connecting rod（5）Outer surface elder generation carburizing and quenching, then according to
Secondary plating last layer titanium layer (12) and nickel dam (11)；The piston（1）The annular vertical with piston axis is provided with annular surface
Groove, the piston ring for being bonded with cylinder inner wall and reaching sealing effectiveness is provided with ring-shaped groove；The piston pin（4）For three-stage
Structure, including the hollow cylinder that two sections are divided equally（10）With a heavy wall cylinder（9）, heavy wall cylinder（9）It is welded on piston pin
（4）The middle part of endoporus.
2. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that the piston ring (2) is compression
Ring.
3. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that the piston (1) and piston ring
(2) there is one layer of soft silica gel sealing ring in the ring-shaped groove of contact.
4. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that the heavy wall cylinder (9) with
Piston pin (4) shell is by being formed by welding integral structure.
5. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that piston pin (4) endoporus
Heavy wall cylinder (9) is formed with piston pin (4) by argon arc welding.
6. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that the piston pin（4）Internal diameter
For D, a diameter of D of heavy wall cylinder, thickness 0.2-0.4D.
7. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that the connecting rod (5) is low-alloy
Steel or modulation steel.
8. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that connecting rod (5) carburizing and quenching
Treatment temperature is 800-1000 degrees Celsius.
9. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that the titanium layer (12) is 40-80
Nanometer, the nickel dam (11) is 40-100 nanometers.
10. the pressurized crankcase of no oily piston according to claim 1, it is characterised in that the heavy wall cylinder (9) is
45 steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876416.3A CN107606148A (en) | 2017-09-25 | 2017-09-25 | A kind of pressurized crankcase of no oily piston |
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| CN201710876416.3A CN107606148A (en) | 2017-09-25 | 2017-09-25 | A kind of pressurized crankcase of no oily piston |
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| GB1313639A (en) * | 1969-01-14 | 1973-04-18 | Leeds Piston Ring Eng Co Ltd | Piston rings |
| JP2006089841A (en) * | 2004-09-27 | 2006-04-06 | Kobe Steel Ltd | MEMBER MADE OF Ti ALLOY HAVING EXCELLENT WEAR RESISTANCE |
| CN1811151A (en) * | 2006-03-02 | 2006-08-02 | 王雪松 | Piston internal combustion engine with built-in gas pressure chamber |
| CN1982679A (en) * | 2005-12-16 | 2007-06-20 | 日产自动车株式会社 | Internal combustion engine and crank bearing structure for the same |
| CN102287441A (en) * | 2011-08-01 | 2011-12-21 | 重庆小康工业集团股份有限公司 | Motorcycle engine connecting rod and manufacturing process thereof |
| CN102878286A (en) * | 2011-07-11 | 2013-01-16 | 沈文伟 | Inner reinforcing type piston pin |
| CN102926837A (en) * | 2012-11-13 | 2013-02-13 | 力帆实业(集团)股份有限公司 | Lubricating system for crank-connecting rod mechanism of high-rotation gasoline engine |
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|---|---|---|---|---|
| GB1313639A (en) * | 1969-01-14 | 1973-04-18 | Leeds Piston Ring Eng Co Ltd | Piston rings |
| JP2006089841A (en) * | 2004-09-27 | 2006-04-06 | Kobe Steel Ltd | MEMBER MADE OF Ti ALLOY HAVING EXCELLENT WEAR RESISTANCE |
| CN1982679A (en) * | 2005-12-16 | 2007-06-20 | 日产自动车株式会社 | Internal combustion engine and crank bearing structure for the same |
| CN1811151A (en) * | 2006-03-02 | 2006-08-02 | 王雪松 | Piston internal combustion engine with built-in gas pressure chamber |
| CN102878286A (en) * | 2011-07-11 | 2013-01-16 | 沈文伟 | Inner reinforcing type piston pin |
| CN102287441A (en) * | 2011-08-01 | 2011-12-21 | 重庆小康工业集团股份有限公司 | Motorcycle engine connecting rod and manufacturing process thereof |
| CN102926837A (en) * | 2012-11-13 | 2013-02-13 | 力帆实业(集团)股份有限公司 | Lubricating system for crank-connecting rod mechanism of high-rotation gasoline engine |
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| 邬惠乐，张洪欣: "汽车技术词典", 31 December 1989, 北京：人民交通出版社, pages: 269 * |
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