CN205744176U - Adjustable length engine piston - Google Patents
Adjustable length engine piston Download PDFInfo
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- CN205744176U CN205744176U CN201620586295.XU CN201620586295U CN205744176U CN 205744176 U CN205744176 U CN 205744176U CN 201620586295 U CN201620586295 U CN 201620586295U CN 205744176 U CN205744176 U CN 205744176U
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- Prior art keywords
- piston
- elastic component
- cervical region
- adjustable length
- guide bar
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Abstract
The utility model discloses a kind of adjustable length engine piston, belong to engine piston technical field.This utility model includes piston head, cervical region and piston guide bar, and piston guide end separates with piston seal end, is slidably connected by the guide runner on piston guide bar top between cervical region and piston guide bar；Flexible part groove in described cervical region, elastic component groove is built with elastic component, described guide runner stretches in described elastic component groove by slip jack, guide runner has axially stop block in described elastic component groove, under described elastic component elastic force effect, under resting state, between described cervical region and piston guide bar, leave compression clearance；On described piston guide bar, there is link joint feature.This utility model is realizing while piston guide end separates with piston seal end, by regulating piston variable-length, changes the piston compression ratio at this electromotor of top dead centre moment.
Description
Technical field
This utility model relates to a kind of engine piston changing compression ratio, belongs to engine piston technical field.
Background technology
At present, the piston used on conventional engines is all with the piston guiding skirt section, Chinese patent: internal combustion engine can
Ratios piston, notification number is CN 101900056 B, although the piston of its design has the effect of variable compression ratio, but
Owing to being limited by traditional engine construction, variable compression ratio is limited in scope, and improves limited to engine performance.Chinese patent
Apply for such as: double-crank mechanism electromotor, application number: 201410653964.6；Double-crank mechanism two stroke engine, application number:
201410655941.9, all propose the piston without skirt that piston guide end separates with piston seal end, use Double crank mechanism simultaneously
Stress action spot is easily lubricated district by high temperature, high pressure and piston at a high speed and cylinder reciprocating zone-transfer by structures etc. to low temperature
Territory, it is achieved exist without other active force in addition to piston ring back pressure between piston and cylinder, but above-mentioned patent does not propose
The problem of variable compression ratio.
Summary of the invention
In place of overcoming above-mentioned the deficiencies in the prior art, this utility model provides a kind of adjustable length electromotor to live
Plug, by regulating piston variable-length, changes the piston compression ratio at this electromotor of top dead centre moment.Electromotor is in medium and small negative
During lotus operating mode, use big compression ratio to improve the thermal efficiency；When electromotor is in full load mode, use small reduction ratio pre-explosion-proof
Shake.
This utility model is achieved by the following technical solution: a kind of adjustable length engine piston, and it includes living
Chock plug, cervical region and piston guide bar, piston guide end separates with piston seal end, and described piston head is as the institute coordinated with cylinder
Stating piston seal end, described piston guide bar is as described piston guide end；
Described piston head and the fixing connection of cervical region, by piston guide bar top between described cervical region and piston guide bar
Guide runner is slidably connected；
Flexible part groove in described cervical region, elastic component groove is built with elastic component, and described cervical region lower end has and elastic component groove phase
Logical slip jack, described guide runner is stretched in described elastic component groove by slip jack, and guide runner is at described elastic component
Axially stop block is had, under described elastic component elastic force effect, under resting state between described cervical region and piston guide bar in groove
Leave compression clearance；
On described piston guide bar, there is link joint feature.
Described elastic component is disc spring or helical spring.
Radial limiting device is had between described guide runner and described slip jack.
Described radial limiting device is mounted in the positive stop key on described guide runner, and the inwall of described slip jack makes
There is the limit sliding chutes adaptive with described positive stop key.
Described axially stop block be on described guide runner arrange defining flange and at described elastic component bottom land end
The limited step arranged.
Described guide runner is by sliding sleeve and is positioned at the connection boss of piston guide bar upper end by releasable connection part I connection
Becoming, the sidewall making connecting boss has keyway, and keyway is built with positive stop key, and the inwall of described slip jack makes to be had and described limit
The limit sliding chutes that position key is adaptive, positive stop key is " T " font singly-bound, and the thick section of " T " font singly-bound is arranged in keyway, " T " font
The thin segment of singly-bound is from the side opening of described sliding sleeve through stretching in described limit sliding chutes, and the upper end of described sliding sleeve is positioned at described elastic component
Groove is interior and makes limited location flange, and described elastic component bottom land end is provided with the limited step suitable with defining flange.
The upper end of described cervical region makes sealing flange portion, and described piston head is led to by top land and described sealing flange portion
Cross releasable connection part II to be formed by connecting, have briquetting to stretch into the described intrinsic pressure residence of elastic component groove in the middle of the lower end of described top land and state
Elastic component.
Described link joint feature is connecting rod slot, and connecting rod slot is the groove run through for connecting rod.
The lower ending opening of described connecting rod slot, at the lower ending opening of connecting rod slot, releasable connection has wear-resisting bottom end cover.
The inner upper end of described connecting rod slot is equipped with wear-resisting upper lining lid.
The beneficial effects of the utility model are: this utility model is to realize piston guide end same with what piston seal end separated
Time, by regulating piston variable-length, change the piston compression ratio at this electromotor of top dead centre moment.Electromotor is in medium and small negative
During lotus operating mode, use big compression ratio to improve the thermal efficiency；When electromotor is in full load mode, use small reduction ratio pre-explosion-proof
Shake.Compression ratio can realize from 11～18.6 variable, on the premise of ensureing that high load capacity does not knocks, and the Smaller load thermal efficiency in raising,
Thus save oil consumption 20%.Exhaust phase, piston is in maximum extension state, residual gas can be greatly lowered, thus enter one
Step improves compression ratio, improves the thermal efficiency.
Accompanying drawing explanation
Below according to drawings and Examples, this utility model is further illustrated.
Fig. 1 this utility model structural representation；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the upward view of Fig. 1；
Fig. 4 is this utility model top land structure chart；
Fig. 5 is this utility model neck structure schematic diagram；
Fig. 6 is the A direction view of Fig. 5；
Fig. 7 is the B-B sectional view of Fig. 5；
Fig. 8 is this utility model shift sleeve structure schematic diagram；
Fig. 9 is the left view of Fig. 8；
Figure 10 is this utility model bottom end cover structural representation；
Figure 11 is the upward view of Figure 10；
Figure 12 is this utility model piston guide bar structure chart；
Figure 13 is the top view of Figure 12；
Figure 14 is the left view of Figure 12；
Figure 15 is the upward view of Figure 12；
Figure 16-17 is that this utility model uses state reference map；
In figure, 1, top land, 1-1, briquetting, 2, cervical region, 2-1, sealing flange portion, 2-2, elastic component groove, 2-3, spacing
Chute, 2-4, slip jack, 3, elastic component, 4, guide runner, 5, positive stop key, 6, piston guide bar, 6-1, connecting rod slot, 6-2,
Connect boss, 6-3, keyway, 7, bottom end cover, 8, upper lining lid, 9, compression clearance, 10, sliding sleeve, 11, axially stop block, 12, can
Tear connector I open, 13, annular groove, 14, releasable connection part II, 15, piston head, 16, connecting rod, 17, bent axle.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is further illustrated.
The adjustable length engine piston of one as shown in Figure 1-Figure 3, it includes that piston head 15, cervical region 2 and piston are led
To bar 6, piston guide end separates with piston seal end, described piston head 15 as the described piston seal end coordinated with cylinder,
Described piston guide bar 6 is as the described piston guide end with the piston guide slot fit on cylinder body；Piston guide bar 6 can be made
Cylindrical.
Described piston head 15 and the fixing connection of cervical region 2, by piston guide bar 6 between described cervical region 2 and piston guide bar 6
The guide runner 4 on top is slidably connected；
Flexible part groove 2-2 in described cervical region 2, elastic component groove 2-2 have and bullet built with elastic component 3, described cervical region 2 lower end
The slip jack 2-4 that property part groove 2-2 communicates, described guide runner 4 stretches in described elastic component groove 2-2 by slip jack 2-4,
Guide runner 4 has axially stop block 11 in described elastic component groove 2-2, under described elastic component 3 elastic force effect, and resting state
Under leave compression clearance 9 between described cervical region 2 and piston guide bar 6；
On described piston guide bar 6, there is link joint feature.
Described elastic component 3 be disc spring or disc spring combination or helical spring.
Radial limiting device is had between described guide runner 4 and described slip jack 2-4.
Described radial limiting device is mounted in the positive stop key 5 on described guide runner 4, and described slip jack 2-4's is interior
Wall makes to be had and limit sliding chutes 2-3 of described positive stop key 5 adaptation.Positive stop key 5 can be flat key or spline etc..
Described axially stop block 11 be on described guide runner 4 arrange defining flange and at described elastic component groove 2-
The limited step that 2 bottoms are arranged.
As shown in Fig. 1, Fig. 5-Fig. 9, Figure 12-Figure 15, described guide runner 4 is by sliding sleeve 10 and is positioned on piston guide bar 6
The connection boss 6-2 of end is formed by connecting by releasable connection part I12, and the sidewall making connecting boss 6-2 has keyway 6-3, keyway
6-3 is built with positive stop key 5, and the inwall of described slip jack 2-4 makes to be had and limit sliding chutes 2-3 of described positive stop key 5 adaptation, limit
Position key 5 is " T " font singly-bound, and the thick section of " T " font singly-bound is arranged in keyway 6-3, and the thin segment of " T " font singly-bound is from described cunning
The side opening of set 10 is through stretching in described limit sliding chutes 2-3, and the upper end of described sliding sleeve 10 is positioned at described elastic component groove 2-2 and makes
Making limited location flange, described elastic component groove 2-2 bottom is provided with the limited step suitable with defining flange.
The upper end of described cervical region 2 makes sealing flange portion 2-1, and described piston head 15 is by top land 1 and described sealing
Flange part 2-1 is formed by connecting by releasable connection part II14, has briquetting 1-1 to stretch into described in the middle of the lower end of described top land 1
Elastic component groove 2-2 states elastic component 3 in intrinsic pressure residence.Releasable connection part II14 can use screw, bolt, during fastening logical, moreover it is possible to right
Elastic component is adjusted pretension.Sealing flange portion 2-1 outer rim makes has three row's annular grooves 13, upper two rows to fill compression ring, lower row's charge of oil ring.
Above-mentioned two sections of structures mentioned, dismounting simplicity, there is preferable manufacturability.
As shown in Fig. 1, Figure 10-Figure 15, described link joint feature is connecting rod slot 6-1, and connecting rod slot 6-1 is to pass through for connecting rod
The groove worn.
The lower ending opening of described connecting rod slot 6-1, at the lower ending opening of connecting rod slot 6-1, releasable connection has bottom end cover 7.Institute
State the inner upper end of connecting rod slot 6-1 equipped with wear-resisting upper lining lid 8.
With reference to Figure 16-Figure 17, this utility model piston is used in the twin crankshaft engine with double-crank mechanism, by stress
Application point by high temperature, high pressure and piston at a high speed with cylinder reciprocating zone-transfer to the easy regions of lubrication of low temperature, it is achieved piston
And exist without other active force in addition to piston ring back pressure between cylinder, it is achieved use the cylinder sleeve of ceramic material manufacture, piston etc.
Parts are solely subjected to the pressure loading of high-temperature fuel gas, it is achieved improve on the premise of not increasing ceramic material toughness and manufacturing cost
Its reliability and service life.
This utility model is realizing while piston guide end separates with piston seal end, by regulating piston variable length
Degree, changes the piston compression ratio at this electromotor of top dead centre moment.When electromotor is in middle small load condition, use big compression ratio
Improve the thermal efficiency；When electromotor is in full load mode, small reduction ratio is used to carry out knock prevention.Compression ratio can realize from 11～
18.6 is variable, on the premise of ensureing that high load capacity does not knocks, and the Smaller load thermal efficiency in raising, thus save oil consumption 20%.Aerofluxus
In the stage, piston is in maximum extension state, residual gas can be greatly lowered, thus improve compression ratio further, improves thermal effect
Rate.
Claims (10)
1. an adjustable length engine piston, it is characterised in that: it includes piston head (15), cervical region (2) and piston guide
Bar (6), piston guide end separates with piston seal end, and described piston head (15) is as the described piston seal coordinated with cylinder
End, described piston guide bar (6) is as described piston guide end；
Described piston head (15) and the fixing connection of cervical region (2), led by piston between described cervical region (2) and piston guide bar (6)
It is slidably connected to the guide runner (4) on bar (6) top；
Flexible part groove (2-2) in described cervical region (2), elastic component groove (2-2) is built with elastic component (3), described cervical region (2) lower end
Having the slip jack (2-4) communicated with elastic component groove (2-2), described guide runner (4) stretches into described by slip jack (2-4)
In elastic component groove (2-2), guide runner (4) has axially stop block (11), in described elasticity in described elastic component groove (2-2)
Under part (3) elastic force effect, under resting state, between described cervical region (2) and piston guide bar (6), leave compression clearance (9)；
On described piston guide bar (6), there is link joint feature.
Adjustable length engine piston the most according to claim 1, it is characterised in that: described elastic component (3) is disc spring
Or helical spring.
Adjustable length engine piston the most according to claim 1, it is characterised in that: described guide runner (4) and institute
State and have radial limiting device between slip jack (2-4).
Adjustable length engine piston the most according to claim 3, it is characterised in that: described radial limiting device is peace
The positive stop key (5) being contained on described guide runner (4), the inwall of described slip jack (2-4) makes to be had and described positive stop key (5)
Adaptive limit sliding chutes (2-3).
Adjustable length engine piston the most according to claim 1, it is characterised in that: described axially stop block (11)
It is the defining flange in the upper setting of described guide runner (4) and the limited step in the setting of described elastic component groove (2-2) bottom.
Adjustable length engine piston the most according to claim 1, it is characterised in that: described guide runner (4) is by sliding
Set (10) and be positioned at the connection boss (6-2) of piston guide bar (6) upper end and be formed by connecting by releasable connection part I (12), connection
The sidewall of boss (6-2) makes keyway (6-3), keyway (6-3) built with positive stop key (5), described slip jack (2-4) interior
Wall makes the limit sliding chutes (2-3) adaptive with described positive stop key (5), and positive stop key (5) is " T " font singly-bound, " T " font singly-bound
Thick section be arranged on keyway (6-3) in, the thin segment of " T " font singly-bound is described spacing through stretching into from the side opening of described sliding sleeve (10)
In chute (2-3), the upper end of described sliding sleeve (10) is positioned at described elastic component groove (2-2) and makes limited location flange, described bullet
Property part groove (2-2) bottom is provided with the limited step suitable with defining flange.
7. according to the adjustable length engine piston described in claim 1 or 6, it is characterised in that: the upper end of described cervical region (2)
Making has sealing flange portion (2-1), and described piston head (15) is passed through by top land (1) and described sealing flange portion (2-1) can
Tear connector II (14) open to be formed by connecting, in the middle of the lower end of described top land (1), have briquetting (1-1) to stretch into described elastic component groove
(2-2) elastic component (3) is stated in intrinsic pressure residence.
Adjustable length engine piston the most according to claim 1, it is characterised in that: described link joint feature is connecting rod
Slot (6-1), connecting rod slot (6-1) is the groove run through for connecting rod.
Adjustable length engine piston the most according to claim 8, it is characterised in that: described connecting rod slot (6-1)
Lower ending opening, at the lower ending opening of connecting rod slot (6-1), releasable connection has wear-resisting bottom end cover (7).
Adjustable length engine piston the most according to claim 8, it is characterised in that: described connecting rod slot (6-1)
Inner upper end is equipped with wear-resisting upper lining lid (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620586295.XU CN205744176U (en) | 2016-06-16 | 2016-06-16 | Adjustable length engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620586295.XU CN205744176U (en) | 2016-06-16 | 2016-06-16 | Adjustable length engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205744176U true CN205744176U (en) | 2016-11-30 |
Family
ID=57386395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620586295.XU Active CN205744176U (en) | 2016-06-16 | 2016-06-16 | Adjustable length engine piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205744176U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952547A (en) * | 2016-06-16 | 2016-09-21 | 徐州弦波引擎机械科技有限公司 | Length-variable engine piston |
-
2016
- 2016-06-16 CN CN201620586295.XU patent/CN205744176U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952547A (en) * | 2016-06-16 | 2016-09-21 | 徐州弦波引擎机械科技有限公司 | Length-variable engine piston |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |