CN109989846A - Split type steel top steel skirt piston - Google Patents
Split type steel top steel skirt piston Download PDFInfo
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- CN109989846A CN109989846A CN201910401495.1A CN201910401495A CN109989846A CN 109989846 A CN109989846 A CN 109989846A CN 201910401495 A CN201910401495 A CN 201910401495A CN 109989846 A CN109989846 A CN 109989846A
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- piston
- steel
- skirt
- oil
- annular
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 326
- 239000010959 steel Substances 0.000 title claims abstract description 326
- 239000000446 fuel Substances 0.000 claims abstract description 24
- 239000011148 porous material Substances 0.000 claims description 10
- 230000010354 integration Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 15
- 230000017525 heat dissipation Effects 0.000 abstract description 12
- 238000012856 packing Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 104
- 239000010687 lubricating oil Substances 0.000 description 33
- 238000000034 method Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000005461 lubrication Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004992 fission Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
-
- 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
-
- 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
- F02F3/0084—Pistons the pistons being constructed from specific materials
- F02F3/0092—Pistons the pistons being constructed from specific materials the material being steel-plate
-
- 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
- F02F3/02—Pistons having means for accommodating or controlling heat expansion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention relates to internal combustion engine technical fields, disclose split type steel top steel skirt piston, piston only including being equipped with fuel feed hole, piston only includes piston steel top and piston steel skirt, piston steel top is equipped with oil pocket and oil cap, piston steel skirt is equipped with piston boss, the first oil pocket and the second oil pocket and annular rotary table are equipped in piston steel top, the first stage, the second stage, first positioning hole and through-hole are equipped on annular rotary table, discharge orifice is offered on oil cap, first stage is equipped with Oil Guide lid, and Oil Guide is covered equipped with oleophobic hole, and piston steel top is equipped with radiating groove；Piston steel skirt bottom is equipped with round boss and second location hole, and piston steel skirt bottom offers sorting hole, fuel feed hole is equipped at the top of piston steel skirt, and piston steel skirt is equipped with heat release hole and annular groove.The present invention solves in the prior art that grooving steel pistons are because quality is overweight and oil pocket wall surface is blocked up in the middle part of monoblock type, and the problem of piston ring packing can fail when steel pistons heat dissipation effect difference and steel pistons being caused to run.
Description
Technical field
The present invention relates to internal combustion engine technical fields, and in particular to a kind of split type steel top steel skirt piston.
Background technique
Piston subjects the mechanical load and thermic load of alternation, in work as component part vital in internal combustion engine
The operating of high speed is carried out during work in the environment of high temperature, high pressure.Existing piston includes integrally formed piston top
And piston skirt, piston top is interior to be equipped with oil pocket, and when piston works in the cylinder body of internal combustion engine, piston under high temperature and pressure will not
Disconnected power of having an effect with casing wall, generates friction and heat, and the lubricating oil in oil pocket will flow out, and is on the one hand lubricated to piston,
Reduce the friction between piston and cylinder body, on the other hand cool down to piston, avoid piston temperature excessively high and cause deformation with
And piston expansion and lead to scuffing of cylinder bore (cylinder inner wall be drawn as very deep rill, and when piston, piston ring and cylinder wall friction loses close
Feng Xing, so as to cause compression pressure without combustion reduction, dynamic property is lost), influence the normal work of piston.
For existing steel pistons when opening up oil pocket on piston top, there are two types of methods: 1, piston (the i.e. piston top of soldering tech
Oil pocket is opened up after portion's cutting, then piston steel top cutting part is welded again and is gone back)；2, the grooving in the middle part of steel skirt living, using this
On the one hand annular groove wall that method will lead to placement piston on steel pistons top cannot get the bearing of steel pistons skirt in steel pistons operation
And deformation, and in order to obtain the effectively supporting of steel pistons skirt, it must just increase the thickness of piston ring cell wall, will lead in this way
The heat dissipation effect of entire steel pistons reduces, and increases the thickness of piston ring cell wall, and the quality of entire steel pistons will increase, thus
Influence the operational efficiency of steel pistons；On the other hand, it will lead to piston rod after steel pistons skirt grooving and pushing entire steel pistons fortune
When row, generate side-thrust, contact steel pistons skirt with internal combustion engine casing wall, entire steel pistons run when generate inclination, steel pistons and
Internal combustion engine casing wall generates biggish tilt angle, so that piston ring is made to be caused piston ring scuffing by the extruding of internal combustion engine casing wall,
And then piston ring packing is caused to be failed.
Summary of the invention
For above-mentioned deficiency, the object of the present invention is to provide a kind of split type steel top steel skirt pistons, existing to solve
Have in technology in the middle part of monoblock type grooving steel pistons because quality is overweight and oil pocket wall surface is blocked up, and cause steel pistons heat dissipation effect difference with
And steel pistons piston ring packing the problem of failing when running.
To achieve the above object, The technical solution adopted by the invention is as follows:
Split type steel top steel skirt piston, the piston only including being equipped with fuel feed hole, piston only includes piston steel top and work
Steel skirt is filled in, piston steel top is equipped with the oil cap of annular, offers piston boss, the work on two opposite wall surfaces of piston steel skirt
Plug steel top and piston steel skirt are detachably connected, and piston steel top bottom surface central integration has annular rotary table, are formed in annular rotary table
Columned first oil pocket, forms cricoid second oil pocket between annular rotary table and piston steel top, the is installed with outside annular rotary table
One stage is installed with the second stage in annular rotary table, is circumferentially equipped with several first positioning holes, annular rotary table at the top of annular rotary table
Several through-holes are offered on wall surface, the oil cap is connected in the first stage, and discharge orifice, second stage are offered on oil cap
On be connected with Oil Guide lid, several oleophobic holes are offered on Oil Guide tegmental wall face, on the piston steel top inner wall where second oil pocket
Offer radiating groove；Piston steel skirt bottom is interference fitted integrally formed with round boss, round boss and annular rotary table, living
Plug steel skirt bottom offers several second location holes opposite with first positioning hole position, first positioning hole and second location hole it
Between be connected with locating piece, bottom offers several sorting holes in the piston steel skirt, be provided on piston steel skirt several heat release holes and
Annular groove.
The principle of the present invention: piston steel top can be divided into two individuals separated with piston steel skirt, in process can
Oil pocket is individually carried out out to piston steel top well, not will receive the obstruction from piston steel skirt, reduces the difficulty of processing；Together
When, piston steel top and piston steel skirt pass through annular rotary table and round boss interference fit, are fixedly connected with the two, during which pass through again
First positioning hole and second location hole are mutually aligned, then connect to form two with second location hole by first positioning hole by locating piece
Secondary fixation, avoids piston from loosening during running at high speed.In piston operation, lubricating oil along piston only into
Oilhole enters in the second oil pocket from the discharge orifice on oil cap, and flows in the second oil pocket, to the piston where the second oil pocket
Steel top cools down, and the setting of radiating groove, increases the heat dissipation area of piston steel top, further improves dissipating for piston steel top
It is hot, it is entered in annular rotary table after the lubricating oil in the second oil pocket is full of, then through the through-hole on annular rotary table wall surface
In first oil pocket, cool down to piston steel top central region, after the lubricating oil in the second oil pocket overflows, then passes sequentially through Oil Guide
Two oleophobic holes and sorting hole discharge, the lubricating oil of discharge on lid and piston steel skirt enter in the annular groove of piston steel skirt, and
It is flowed along piston steel skirt, piston steel skirt is lubricated, reduce the friction between piston steel skirt and cylinder body.
Beneficial effects of the present invention: compared with prior art,
1, piston steel top and piston steel skirt use steel material, and compared with existing aluminum piston, hardness and strength are more preferable, operation
It is more stable, and under same internal combustion engine cylinder diameter, internal combustion engine casing wall and the gap of this split type steel top steel skirt piston are smaller, piston
The ring not only better tightness with internal combustion engine casing wall, and bigger pressure can also be born when combustion chamber fires, and then improve
Compression ratio (the ratio between cylinder total volume and combustion chamber volume) when internal combustion engine operation.
2, pass through the split type connection of piston steel top and piston steel skirt, the length contracting of entire split type steel top steel skirt piston
Oil pocket area that is short, opening up is bigger, the design of piston ring groove wall thickness thinner, to alleviate the quality of steel pistons entirety, makes
Frictional force reduction, operational efficiency are more preferable when split type steel top steel skirt piston is run, and also improve this split type steel top steel skirt piston
Thermal diffusivity；And by split type connection, reduce technics of slot, so that piston rod be made to push this split type steel top
When steel skirt piston work done, the tilt angle between the steel pistons generated by side-thrust and internal combustion engine casing wall is reduced, is made split type
Steel top steel skirt piston motion amplitude is more steady, prevents piston ring by the extruding of internal combustion engine casing wall, so that the abrasion of piston ring is reduced,
And then piston ring packing is avoided to fail.
3, it by setting round boss and annular rotary table, is interference fitted using round boss and annular rotary table, makes piston steel
Top and piston steel skirt are fixed, and first positioning hole and second location hole are then arranged again, using locating piece by first positioning hole
It is connected with second location hole and secondary fixation is formed to piston, by dual fixation, reduced between piston steel top and piston steel skirt
Relative motion avoids piston from loosening during running at high speed, and increases the stability of piston, to improve the work of piston
Make effect.
4, by opening up through-hole on annular rotary table wall surface, and Oil Guide lid is set, so that limitation of the lubricating oil in Oil Guide lid
Under, it is adequately contacted with the first oil pocket, to keep the heat dissipation effect of piston steel top central region more preferable, then cooperates the second oil pocket,
Radiating and cooling is comprehensively carried out to piston steel top, to avoid piston steel top deformation due to high temperature.
5, by setting annular groove, play the role of certain storage, i.e. ring to the lubricating oil for flowing through piston steel skirt using annular groove
Always there is lubricating oil in slot, achievees the effect that reduce and rub between piston skirt and internal combustion engine casing wall, to reduce piston
Abrasion, while the design of annular groove, equally also increase the contact area of piston steel skirt and lubricating oil, improve cooling effect.
6, (oil pocket is opened up after top land cutting, then by piston steel top with the piston of soldering tech in the art
Cutting part is welded again and is gone back), under cold conditions and hot situation, excessive expansion and contraction can be generated, influence steel pistons with
The efficiency when leakproofness and operation of internal combustion engine steel wall；Meanwhile using the steel pistons after soldering tech, metallographic structure stability
Material property at decline, solder design is poor, and steel pistons are when internal combustion engine overload operates or gas exhaust temperature is excessively high, meeting
There is pad fracture, and this split type steel top steel skirt piston is not in all problems present in above-mentioned soldering formula piston.
Further, the fuel feed hole is provided on piston boss.It is provided with piston boss by fuel feed hole, so that this fission
The oil inlet mode of formula steel top steel skirt piston lubrication oil (i.e. lubricating oil consistent with now one of oil inlet mode of one-piece piston
Entered in oil pocket from the fuel feed hole on piston boss), thus reach in actual installation in use, only need to change piston, and nothing
Other components are needed to change, and then facilitate the installation of operating personnel.
Further, the fuel feed hole is provided with Oil Guide and covers.It is covered by the way that fuel feed hole is provided with Oil Guide, to make to lubricate
Oil is first advanced into the first oil pocket in annular rotary table, cools down to piston steel top central region, then enters the by through-hole
In two oil pockets, cool down to the piston steel top where the second oil pocket, is discharged finally by the outage on oil cap.
Further, the fuel feed hole is provided at the top of piston steel skirt.By the way that fuel feed hole to be provided at the top of piston steel skirt, make
Obtaining lubricating oil can sequentially enter faster into the first oil pocket and the second oil pocket, guarantee abundant cooling, the heat dissipation of piston steel top.
Further, the Oil Guide lid inner hollow, Oil Guide tops are integrally formed with annular slab, and bottom opens up in Oil Guide lid
There is circular groove, be placed with the first spring in circular groove, the first spring top and round boss bottom surface offset setting, and annular slab is connected to the
In one stage；It is removably connected with several spring bases on the oil cap, second spring, second spring top surface are arranged on spring base
It offsets setting with piston steel skirt bottom surface.By the first spring, in split type steel top steel skirt piston actual moving process, guarantee circle
Extruding of the shape boss to Oil Guide lid prevents Oil Guide lid from loosening, influences lubricating oil to the cooling in the middle part of piston steel top；And pass through second
Spring, in split type steel top steel skirt piston actual moving process, the piston steel skirt bottom moment keeps the extruding to oil cap, prevents
Oil cap loosens or displacement, cools down to influence lubricating oil to the piston steel top in oil pocket region.
It is removably connected with several spring bases on the oil cap, second spring, second spring top surface are arranged on spring base
It offsets setting with piston steel skirt bottom surface.Pass through second spring, in split type steel top steel skirt piston actual moving process, piston steel
The skirt bottom moment keeps the extruding to oil cap, prevents oil cap from loosening or being displaced, to influence lubricating oil to the piston in oil pocket region
Steel top cools down.
Further, it is connected with protrusion at the top of the annular rotary table, piston steel skirt bottom offers opposite with raised position
Jack.By protrusion and the jack on piston steel skirt, position restriction is carried out to piston steel top and piston steel skirt, to make piston steel
Top and piston steel skirt are more firm at runtime.
Further, screw thread is equipped in the first positioning hole, locating piece is bolt.Pass through the screw thread and spiral shell of first positioning hole
Bolt, so that piston steel top and piston steel skirt are convenient for dismantling and replace.
Further, the heat release hole is provided on the piston steel skirt wall face where piston boss；The annular groove is close to living
The position setting for filling in steel skirt bottom is intensive, sparse in the position setting far from piston steel skirt bottom.By heat release hole, on the one hand reach
To the effect for mitigating split type steel top steel skirt piston weight, subtract the reciprocal inertia force of split type steel top steel skirt piston at runtime
Small (i.e. piston component and small end of connecting rod do reciprocating linear motion in the cylinder generated inertia force), vibration reduce, to subtract
Small energy consumption；On the other hand the heat dissipation effect for improving piston steel skirt, reduces split type steel top steel skirt piston in the process of running
The deformation generated because heated；And piston is at runtime, is that piston steel top and piston steel skirt are moved above and below under normal conditions
Dynamic, in the process, the lubricating oil on cylinder body wall surface can be contacted with the annular groove being intensively arranged at the top of piston steel skirt in time, from
And in piston steel top and mobile piston steel skirt, it can preferably be lubricated with cylinder body wall surface, while also to piston steel top and piston steel
Skirt carries out effective temperature-reducing.
Further, several piston grooves are provided on the piston steel top, several piston grooves are embedded with piston ring, piston steel
Several pores opposite with ring groove position are provided on top.During piston is run, to internal combustion engine cylinders and divided by piston ring
Body formula steel top steel skirt piston is sealed, the gas leakage for preventing combustion chambers burn from generating, while to the lubrication on cylinder inner wall
Oil uniformly scraped so that on cylinder inner wall covering one layer of oil film, thus guarantee cylinder and split type steel top steel skirt piston and
The normal lubrication of piston ring；Lubricating oil is flowed back on piston steel skirt outer wall under the scraping of piston ring by pore simultaneously, to work
Plug steel skirt is lubricated and cools down.
Further, integrally formed with annular deck at the top of the piston steel top, piston steel skirt bottom, which offers, agrees with
The caulking groove of annular deck.By annular deck and caulking groove, under normal operation, piston steel skirt can preferably be supported on piston steel top
On so that the piston groove on piston steel top outer wall be capable of processing it is thinner, to improve the heat dissipation effect of piston steel top, together
When, piston rod utilizes annular deck and caulking groove, piston steel skirt bottom when pulling this split type steel top steel skirt piston longtime running
Portion can effectively prevent this split type steel top steel skirt piston under high temperature and pressure because drawing with more effectively bearing at the top of piston steel top
It stretches and deformation.
Detailed description of the invention
Fig. 1 is the perspective view of the split type steel top steel skirt piston of the embodiment of the present invention one；
Fig. 2 is the explosive view of the split type steel top steel skirt piston of the embodiment of the present invention one；
Fig. 3 is the perspective view of piston steel skirt depression angle in the embodiment of the present invention one；
Fig. 4 is the perspective view that piston steel skirt looks up angle in the embodiment of the present invention one；
Fig. 5 is the half-section diagram of piston steel top in the embodiment of the present invention one；
Fig. 6 is that fuel feed hole is provided with the schematic diagram on piston steel skirt in the embodiment of the present invention two；
Fig. 7 is that fuel feed hole is provided with the schematic diagram that Oil Guide covers in the embodiment of the present invention three.
Specific embodiment
Below by the further details of explanation of specific embodiment:
Appended drawing reference in Figure of description includes: piston steel top 1, piston steel skirt 2, the first oil pocket 3, oil cap 4, piston pin
Seat 5, annular rotary table 7, the first stage 8, the second stage 9, first positioning hole 10, raised 11, through-hole 12, discharge orifice 13, Oil Guide lid
14, oleophobic hole 15, radiating groove 16, annular deck 17, pore 18, piston groove 19, round boss 20, jack 21, second position
Hole 22, the second oil pocket 24, fuel feed hole 25, annular groove 26, heat release hole 27, caulking groove 28, spring base 29, second spring 30, annular slab 31,
Circular groove 32, the first spring 33, sorting hole 34.
Embodiment one is basic if attached drawing 1 is to shown in Fig. 5:
Split type steel top steel skirt piston, including piston only, piston only include piston steel top 1 and piston steel skirt 2, piston
Steel top 1 is equipped with the oil cap 4 of annular, and piston boss 5,1 middle part of piston steel top are offered on two opposite wall surfaces of piston steel skirt 2
Integrally formed with annular rotary table 7, annular rotary table 7 is interior to form columned first oil pocket 3, annular rotary table 7 and piston steel top 1 for bottom surface
Between form cricoid second oil pocket 24, be installed with the first stage 8 outside annular rotary table 7, be installed with the second stage in annular rotary table 7
9, it sets at the top of annular rotary table 7 there are four first positioning hole 10, every two first positioning hole 10 is one group, two groups of first positioning holes 10
It is oppositely arranged, protrusion 11 is connected at the top of annular rotary table 7, screw thread is equipped in first positioning hole 10, is opened up on annular 7 wall surface of rotary table
There are eight through-holes 12, every four through-holes 12 are one group, and two groups of through-holes 12 are symmetrical arranged, and oil cap 4 is connected in the first stage 8, oil
Discharge orifice 13 is offered on lid 4, Oil Guide lid 14 is connected in the second stage 9, is opened up on 14 wall surface of Oil Guide lid there are two oleophobic hole
15, two oleophobic holes 15 are oppositely arranged, and the top of piston steel top 1 is provided with several integrally formed with annular deck 17 on piston steel top 1
Pore 18, pore 18 is located on the top and annular deck 17 of piston steel top 1, when piston steel top 1 is combined with piston steel skirt 2
When, pore 18 is just opposite with piston steel skirt 2, three piston grooves 19 is provided on 1 side wall of piston steel top, pore 18 is through close
First of piston groove 19 at the top of piston steel top 1 is mounted on piston ring in three piston grooves 19, and piston steel top 1 is most upper
Piston ring in square piston groove 19 is used for frizing, and in addition the piston ring in twice piston groove 19 is used for and internal combustion engine casing wall
It seals, offers radiating groove 16 on 1 inner wall of piston steel top where the second oil pocket 24；2 bottom of piston steel skirt is integrally formed with circle
Shape boss 20, round boss 20 and annular rotary table 7 are interference fitted, and 2 bottom of piston steel skirt offers jack 21 and four second fixed
Position hole 22, jack 21 is opposite with raised 11 positions, and second location hole 22 is opposite with 10 position of first positioning hole, 1 He of piston steel top
Piston steel skirt 2 carries out detachable connection by connecting bolt between first positioning hole 10 and second location hole 22, in internal combustion
In the case that machine cylinder diameter is 190-200mm, the diameter of first positioning hole 10 and second location hole 22 is 16-22mm, piston steel skirt 2
Interior bottom is opened up there are two sorting hole 34, is offered fuel feed hole 25 at the top of piston steel skirt 2, is connected between fuel feed hole 25 and discharge orifice 13
It is connected to oil pipe, piston steel skirt 2 is located at piston with respect to eight annular grooves 26, annular groove 26 and piston boss 5 is offered in two side walls
On the different lateral of steel skirt 2, annular groove 26 is intensive in the position setting close to 2 bottom of piston steel skirt, far from 2 bottom of piston steel skirt
Position setting it is sparse, several heat release holes 27 not of uniform size are offered on 2 wall surface of piston steel skirt equipped with piston boss 5；It is living
Plug 2 bottom of steel skirt offers the caulking groove 28 for agreeing with annular deck 17, and there are four spring base 29, every two for threaded connection on oil cap 4
Spring base 29 is one group, and two groups of spring bases 29 are oppositely arranged, and second spring 30,30 top surface of second spring are arranged on spring base 29
It offsets setting with 2 bottom surface of piston steel skirt.
Distance is 5-6mm, Oil Guide lid between bottom in 14 inner hollow of Oil Guide lid, 14 bottom of Oil Guide lid and annular rotary table 7
14 tops are integrally formed with annular slab 31, and bottom offers circular groove 32 in Oil Guide lid 14, and the first spring 33 is placed in circular groove 32,
Offset at the top of first spring 33 with 20 bottom surface of round boss setting, and annular slab 31 is connected in the second stage 9.
The specific implementation of the present embodiment one is as follows: the first spring and second spring in the present embodiment are that can bear 280
Degree Celsius heatproof material.When processing, piston steel top 1 can be divided into two individuals separated with piston steel skirt 2, can be to piston steel top
1 carries out separately machined with piston steel skirt 2, therefore individually can carry out out oil pocket to piston steel top 1 well in process,
It not will receive the obstruction from piston steel skirt 2, reduce the difficulty of processing.And matched by round boss 20 and annular rotary table 7
It closes, then opens up heat release hole 27 on 2 wall surface of piston steel skirt, on the one hand reduce the weight of entire split type steel top steel skirt piston,
Make that entire split type steel top steel skirt piston operational efficiency is more preferable, heat dissipation is more preferable, and vibrates and reduce, so that operation is more stable,
On the other hand the stroke of lubricating oil is shortened, lubricating oil can flow through piston steel top 1 and piston steel skirt 2 more quickly, realize
The effect for lubricating and cooling down in time, reduces expansion and the carbon distribution of split type steel top steel skirt piston；Pass through annular deck 17 and caulking groove
28, piston steel top 1 can be preferably supported on piston steel skirt 2 at runtime, meanwhile, the piston groove on 1 outer wall of piston steel top
19 be capable of processing it is thinner, to improve the heat dissipation effect of piston steel top 1, and in split type steel top steel skirt piston longtime running
When, the sagging, deformation because of excessive compression of piston groove 19 on piston steel top 1 is prevented, so that the leakproofness of piston ring is influenced, into
And internal combustion engine is avoided to increase unnecessary oil consumption.When assembling, oil cap 4 is snapped fit onto the first stage 8, on four spring bases 29
Set connects second spring 30, and then Oil Guide lid 14 is snapped fit onto the second stage 9, places first in the circular groove 32 of Oil Guide lid 14
Spring 33 finally allows the annular rotary table 7 of piston steel top 1 and the round boss 20 of piston steel skirt 2 to be interference fitted, piston steel top 1
Protrusion 11 is inserted into the jack 21 of piston steel skirt 2, carries out position and fixes, and both makes preliminary docking, during which allows on annular rotary table 7
Four second location holes 22 in four first positioning holes 10 and piston steel skirt 2 are mutually aligned, then are positioned by bolt by first
Hole 10 and the connection of second location hole 22 form secondary fixation, and split type steel top steel skirt piston is avoided to send out during running at high speed
It is raw to loosen, and in the case where internal combustion engine cylinder diameter is 190-200mm, now Split piston is used for the first positioning hole 10 of connection
It is 12mm with second location hole 22, and this split type steel top steel skirt piston is for connecting the first of piston steel top 1 and piston steel skirt 2
It is 16-22mm that location hole 10 and second location hole 22, which are diameter, and bonding strength is more preferable.
When the operation of split type steel top steel skirt piston, lubricating oil flows to discharge orifice 13 from fuel feed hole 25 by oil pipe, then into
Enter into the second oil pocket 24, to cooling down for the piston steel top 1 where the second oil pocket 24, and the setting of radiating groove 16, increase
The heat dissipation area of piston steel top 1, further improves the thermal diffusivity of piston steel top 1；After the lubricating oil in oil pocket is full of, lead to
Eight through-holes 12 crossed on 7 wall surface of annular rotary table enter in the first oil pocket 3 of 14 lower section of Oil Guide lid, in piston steel top 1
Central region cools down；In the case where identical cylinder diameter, the first oil pocket 3 and the second oil pocket of this split type steel top steel skirt piston
The sum total of 24 areas is 1-2 times of existing piston oil cavity area, and therefore, heat dissipation area is bigger, so as to more fully to piston
1 radiating and cooling of steel top, and then piston steel top 1 is avoided to deform because of high temperature, when between both Oil Guide lid 14 and annular rotary table 7 5-6mm
Full of after lubricating oil, lubricating oil flows out the first oil pocket 3 between gap from two oleophobic holes 15 on 14 wall surface of Oil Guide lid, then from
Two sorting holes 34 of piston steel skirt 2 flow back, meanwhile, the lubricating oil on IC engine cylinder body wall can enter eight annular grooves 26
It is interior, and flowed along piston steel skirt 2, make piston steel top 1 and piston steel skirt 2 when moving up and down, can be produced between cylinder body wall surface
Raw preferably lubrication, while effective temperature-reducing also is carried out to piston steel top 1 and piston steel skirt 2；It is transported in split type steel top steel skirt piston
When row, the piston ring in 1 the top piston groove 19 of piston steel top slides on the cylinder inner wall of internal combustion engine, in IC engine cylinder
Lubricating oil on wall is uniformly scraped, to guarantee the normal lubrication of cylinder and split type steel top steel skirt piston and piston ring；
Lubricating oil flows into pore 18 simultaneously, since pore 18 and piston steel skirt 2 are opposite, and scraping using piston ring, make lubricating oil
Flow back, lubricating oil allowed to be flow back on the wall surface of piston steel skirt 2 again, piston steel top 1 and piston steel skirt 2 are lubricated and
Cooling, further decreases the friction between piston and cylinder body, so that (i.e. cylinder occurs in the case where reducing abrasion and the scuffing of cylinder bore of piston
Inner wall is drawn as very deep rill, loss of seal when piston, piston ring, compression ring and cylinder wall friction, so as to cause cylinder pressure
Compression pressure reduces, and dynamic property is lost), meanwhile, the three piston grooves 19 opened up on this split type steel top steel skirt piston are than existing
Few one on piston, thus the coefficient of friction (i.e. two when reducing the operation of split type steel top steel skirt piston with internal combustion engine casing wall
The ratio of frictional force and the vertical force acted in surface thereof between surface), and then improve and use this split type steel top steel
The power of skirt piston IC engine.
By spring base 29 and second spring 30, the 2 bottom moment of piston steel skirt keeps the extruding to oil cap 4, prevents oil cap 4
It loosens or is displaced, effective temperature-reducing is carried out to the piston steel top 1 in oil pocket region to influence lubricating oil；By the first spring 33, divide
In actual moving process, extruding at the time of ensure that round boss 20 to Oil Guide lid 14 prevents from leading body formula steel top steel skirt piston
The loosening of oil cap 14 or displacement and influence lubricating oil to the cooling at 1 middle part of piston steel top and the proper flow of lubricating oil.
Embodiment two:
As shown in Fig. 6, the difference between this embodiment and the first embodiment lies in: fuel feed hole 25 is provided on piston boss 5.It should
Set-up mode is consistent with now one of oil inlet mode of one-piece piston, is all the fuel feed hole being arranged from piston boss 5
25 enter oil pocket, and therefore, when being replaced to the piston in existing cylinder, it is this fission that original piston need to only be replaced to this
Formula steel top steel skirt piston is not necessarily to other more sliding components, to make installation, using more convenient.
Embodiment three:
As shown in Fig. 7, the difference between this embodiment and the first embodiment lies in: fuel feed hole 25 is provided with circular groove on Oil Guide lid 14
32 middle part.The lubrication, cooling effect of the present embodiment are the same as example 1, difference be lubricating oil flow direction on the contrary,
The lubricating oil of the present embodiment successively enters from two sorting holes 34 of steel top steel skirt and the fuel feed hole 25 being provided on Oil Guide lid 14
In annular rotary table 7, then entered in oil pocket by eight through-holes 12 of annular rotary table 7, finally, lubricating oil is from the oil extraction on oil cap 4
It is flowed back in hole.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as specific embodiment can be used for explaining the content of claim.
Claims (10)
1. split type steel top steel skirt piston, the piston only including being equipped with fuel feed hole, piston only includes piston steel top and piston
Steel skirt, piston steel top are equipped with the oil cap of annular, offer piston boss on two opposite wall surfaces of piston steel skirt, feature exists
In: the piston steel top and piston steel skirt are detachably connected, and piston steel top bottom surface central integration has annular rotary table, annular circle
Columned first oil pocket is formed in platform, forms cricoid second oil pocket between annular rotary table and piston steel top, outside annular rotary table
It is installed with the first stage, the second stage is installed in annular rotary table, is circumferentially equipped with several first positioning holes at the top of annular rotary table,
Several through-holes are offered on annular rotary table wall surface, the oil cap is connected in the first stage, and discharge orifice is offered on oil cap, described
It is connected with Oil Guide lid in second stage, several oleophobic holes, the piston steel where second oil pocket are offered on Oil Guide tegmental wall face
Radiating groove is offered on the inner wall of top；Piston steel skirt bottom is integrally formed with round boss, round boss and annular rotary table mistake
It is full of cooperation, piston steel skirt bottom offers several second location holes opposite with first positioning hole position, first positioning hole and
Locating piece is connected between two location holes, bottom offers several sorting holes in the piston steel skirt, if being provided on piston steel skirt
Dry heat release hole and annular groove.
2. split type steel top steel skirt piston according to claim 1, it is characterised in that: the fuel feed hole is provided with piston pin
On seat.
3. split type steel top steel skirt piston according to claim 1, it is characterised in that: the fuel feed hole is provided with Oil Guide lid
On.
4. split type steel top steel skirt piston according to claim 1, it is characterised in that: the fuel feed hole is provided with piston steel
At the top of skirt.
5. split type steel top steel skirt piston according to claim 4, it is characterised in that: the Oil Guide lid inner hollow is led
Integrally formed with annular slab at the top of oil cap, bottom offers circular groove in Oil Guide lid, and the first spring, the first spring are placed in circular groove
Top and round boss bottom surface offset setting, and annular slab is connected in the first stage；It is removably connected on the oil cap several
Spring base, is arranged with second spring on spring base, and second spring top surface and piston steel skirt bottom surface offset setting.
6. split type steel top steel skirt piston according to claim 5, it is characterised in that: be connected at the top of the annular rotary table
Protrusion, piston steel skirt bottom offer the jack opposite with raised position.
7. split type steel top steel skirt piston according to claim 6, it is characterised in that: be equipped with spiral shell in the first positioning hole
Line, locating piece are bolt.
8. according to claim 7, it is characterised in that: the heat release hole is provided with the piston steel skirt wall where piston boss
On face；The annular groove is intensive in the position setting close to piston steel skirt bottom, dilute in the position setting far from piston steel skirt bottom
It dredges.
9. split type steel top steel skirt piston according to claim 8, it is characterised in that: be provided on the piston steel top several
Piston groove, several piston grooves are embedded with piston ring, and several pores opposite with ring groove position are provided on piston steel top.
10. split type steel top steel skirt piston according to claim 9, it is characterised in that: one at the top of the piston steel top
Annular deck is formed, piston steel skirt bottom offers the caulking groove for agreeing with annular deck.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018104742780 | 2018-05-17 | ||
| CN201810474278.0A CN108547707A (en) | 2018-05-17 | 2018-05-17 | Split type steel top steel skirt piston |
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| Publication Number | Publication Date |
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| CN109989846A true CN109989846A (en) | 2019-07-09 |
| CN109989846B CN109989846B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810474278.0A Pending CN108547707A (en) | 2018-05-17 | 2018-05-17 | Split type steel top steel skirt piston |
| CN201910401495.1A Active CN109989846B (en) | 2018-05-17 | 2019-05-14 | Split steel top steel skirt piston |
| CN201920687579.1U Active CN210003403U (en) | 2018-05-17 | 2019-05-14 | Split piston |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810474278.0A Pending CN108547707A (en) | 2018-05-17 | 2018-05-17 | Split type steel top steel skirt piston |
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| CN201920687579.1U Active CN210003403U (en) | 2018-05-17 | 2019-05-14 | Split piston |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108547707A (en) * | 2018-05-17 | 2018-09-18 | 象山浦动机械科技有限公司 | Split type steel top steel skirt piston |
| CN109341175B (en) * | 2018-10-22 | 2021-10-12 | 广东广垦绿色农产品有限公司 | Freshness retaining device based on air pressure preservation and refrigeration |
| CN112901365B (en) * | 2021-02-10 | 2022-06-21 | 李斯特技术中心（上海）有限公司 | Combined type piston and engine |
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| CA1062565A (en) * | 1977-04-12 | 1979-09-18 | Thomas J. Pearsall | Variable compression ratio piston |
| CN85100321A (en) * | 1985-04-01 | 1985-09-10 | 大连海运学院 | Diesal engine with oil-cushioned piston |
| JPS61272453A (en) * | 1985-05-24 | 1986-12-02 | エム・ア−・エヌ・−ベ−・ウント・ヴエ−・デイ−ゼル・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Plunger piston consisting of oil-cooled multiple section of internal combustion engine |
| CN102330617A (en) * | 2011-08-31 | 2012-01-25 | 李钢 | Adaptive variable compression engine piston |
| JP2013083221A (en) * | 2011-10-11 | 2013-05-09 | Mitsubishi Motors Corp | Piston of internal combustion engine |
| CN105986923A (en) * | 2015-02-09 | 2016-10-05 | 强哲菲 | Steel piston with double oil chambers and machining method thereof |
| CN210003403U (en) * | 2018-05-17 | 2020-01-31 | 象山浦动机械科技有限公司 | Split piston |
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2018
- 2018-05-17 CN CN201810474278.0A patent/CN108547707A/en active Pending
-
2019
- 2019-05-14 CN CN201910401495.1A patent/CN109989846B/en active Active
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| CA1062565A (en) * | 1977-04-12 | 1979-09-18 | Thomas J. Pearsall | Variable compression ratio piston |
| CN85100321A (en) * | 1985-04-01 | 1985-09-10 | 大连海运学院 | Diesal engine with oil-cushioned piston |
| JPS61272453A (en) * | 1985-05-24 | 1986-12-02 | エム・ア−・エヌ・−ベ−・ウント・ヴエ−・デイ−ゼル・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Plunger piston consisting of oil-cooled multiple section of internal combustion engine |
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| Publication number | Publication date |
|---|---|
| CN108547707A (en) | 2018-09-18 |
| CN109989846B (en) | 2024-05-14 |
| CN210003403U (en) | 2020-01-31 |
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