CN103016509B - A kind of reciprocating-piston engine vuilt-up crankshaft - Google Patents
A kind of reciprocating-piston engine vuilt-up crankshaft Download PDFInfo
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- CN103016509B CN103016509B CN201210569413.2A CN201210569413A CN103016509B CN 103016509 B CN103016509 B CN 103016509B CN 201210569413 A CN201210569413 A CN 201210569413A CN 103016509 B CN103016509 B CN 103016509B
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- crankshaft
- main
- journal
- engine
- piston
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Abstract
The invention discloses a kind of reciprocating-piston engine vuilt-up crankshaft, comprise main crankshaft and secondary crankshaft, secondary crankshaft is located between two main journal cranks of main crankshaft, be fixedly arranged in engine body by bearing, one end eccentric setting has secondary crankshaft rod journal to be connected with piston rod, and secondary crankshaft rod journal is provided with groove along secondary crankshaft radial direction; Main crankshaft adopts normal engine machine crankshaft, its main crankshaft rod journal to be inserted in groove and rotatable and reciprocatingly slide, main crankshaft main journal is fixedly arranged on as engine power output shaft in engine body by bearing, and its central axis is positioned at above secondary crankshaft central axis.The present invention realizes the automatic change of whole vuilt-up crankshaft crankweb distance by increase secondary crankshaft, reasonably more thermal energy is become the kinetic energy of crank rotation, improve the utilization ratio of motor fuel heat energy, reduce the discharge of used heat in engine exhaust widely.
Description
Technical field
The invention belongs to engine art, be specifically related to a kind of reciprocating-piston engine vuilt-up crankshaft, the crank arm of force acting on crankshaft journal by automatically changing piston rod improves fuel thermal energy utilization ratio, reduces engine waste heat.
Background technique
Existing reciprocating-piston engine produces heat energy by fuel combustion and does work to piston, and moving up and down of piston is converted into the rotary motion of bent axle by the crank that piston connects bent axle by piston rod.Piston is in expansion stroke, from piston top dead center to lower dead center, piston cylinder fuel combustion produces High Temperature High Pressure major part and is converted to piston acting, its heat energy reduces gradually, because check of crankshaft is fixed, the arm of force that piston rod acts on crank journal is fixed, and causes the conversion of fuel thermal energy unbalanced, still have the heat energy of quite a few as during the used heat of motor is from toxic emission to air, environment is impacted.
Summary of the invention
The too high environmental problem caused of thermal waste for existing motor, the invention discloses the reciprocating-piston engine vuilt-up crankshaft that a kind of check of crankshaft can change automatically, heat energy in reasonable conversion piston expansion stroke, many actings when making piston be in High Temperature High Pressure in piston cylinder, improve the utilization ratio of motor fuel heat energy, reduce the discharge of engine exhaust used heat simultaneously.
For realizing above technical purpose, the present invention adopts following technological scheme: a kind of reciprocating-piston engine vuilt-up crankshaft, comprise main crankshaft 5 and secondary crankshaft 3, described main crankshaft 5 adopts available engine bent axle, described secondary crankshaft 3 is located between two main journal cranks of main crankshaft 5, described secondary crankshaft 3 adopts cylinder axis to be fixedly arranged in engine body 6 as its main journal, its end face eccentric is provided with secondary crankshaft rod journal 7 and is connected with piston rod 1, and secondary crankshaft rod journal 7 is provided with groove 8 along secondary crankshaft radial direction; Rotatable and reciprocatingly slide in the groove 8 that main crankshaft rod journal 10 is inserted into secondary crankshaft rod journal 7, described main crankshaft main journal 9 is fixedly arranged on as engine power output shaft in engine body 6, and its central axis is positioned at above secondary crankshaft 3 central axis.
In the present invention, described groove 8 is waist shaped hole groove.
In the present invention, the reciprocatingly slide distance of main crankshaft rod journal 10 in groove 8 equals the twice of described main crankshaft main journal 9 central axis and secondary crankshaft 3 central axis distance.
In the present invention, the stiffened edge 11 increasing described secondary crankshaft main journal and engine body stress surface is provided with at the excircle of secondary crankshaft 3.
In the present invention, described stiffened edge 11 is greater than the balancer weight of all the other positions as secondary crankshaft 3 at the position thickness with secondary crankshaft rod journal 7 symmetry.
In the present invention, secondary crankshaft rod journal is connected with piston rod, the stroke of piston is the twice of secondary crankshaft crank length, main crankshaft main journal outputting rotary power, therefore secondary crankshaft rod journal axis is the actual Crank arm length of vuilt-up crankshaft in the present invention to the distance of main crankshaft main journal axis, move in the groove of main crankshaft rod journal on secondary crankshaft rod journal, realize the automatic change of vuilt-up crankshaft crank length in the present invention.In the expansion stroke of piston, when the piston is at the top dead center, secondary crankshaft rod journal is positioned at the upper summit of secondary crankshaft, main crankshaft rod journal is positioned at the upper summit of groove equally, now the distance of the actual crankweb of vuilt-up crankshaft is minimum, and the length of secondary crankshaft crank should be less than, piston needs to do more merit to bent axle and could rotate by driving crank, heat energy now in piston cylinder is maximum value, and piston can consume the kinetic energy that more thermal power transfer becomes crank rotation downwards from the process that top dead center does work; In the process of piston arrives lower dead center, heat energy in piston cylinder reduces gradually, the distance of actual crankweb then increases gradually, the also corresponding minimizing of piston actuated crank rotation institute work, piston arrives after bottom dead center, main crankshaft and secondary crankshaft rotate 180 ° simultaneously, main crankshaft rod journal reaches the lower summit of groove, the distance of actual crankweb reaches maximum, and the length of secondary crankshaft crank should be greater than, now piston expansion stroke terminates, and other piston starts expansion stroke and drives this backward stroke of the piston in motor.
From the above mentioned, the present invention realizes the automatic change of whole vuilt-up crankshaft crankweb distance by increase secondary crankshaft, reasonably more thermal energy is become the kinetic energy of crank rotation, improve the utilization ratio of motor fuel heat energy, reduce the discharge of used heat in engine exhaust widely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the plan view of secondary crankshaft.
Fig. 3 is the left view (the A direction view of Fig. 2) of secondary crankshaft.
Fig. 4 is the right elevation of secondary crankshaft.
Fig. 5 is main crankshaft and the motion schematic diagram of secondary crankshaft when piston is positioned at top dead center.
Schematic diagram when Fig. 6 is Fig. 5 half-twist.
Fig. 7 is the schematic diagram of Fig. 5 when rotating 180 °.
Fig. 8 is the schematic diagram of Fig. 5 when rotating 270 °.
Number in the figure: 1-piston rod, 2-clutch shaft bearing, 3-secondary crankshaft, 4-second bearing, 5-main crankshaft, 6-engine body, 7-secondary crankshaft rod journal, 8-groove, 9-main crankshaft main journal, 10-main crankshaft rod journal, 11-stiffened edge, 12-sliding shaft sleeve.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
Embodiment
See Fig. 1, the present embodiment is the schematic diagram of one of them crankshaft section of reciprocating-piston engine, comprise main crankshaft 5 and secondary crankshaft 3, main crankshaft 5 adopts existing integral one-piece crankshaft, and secondary crankshaft 3 is adopted releasable bent axle and is located at by bolt between two main journal cranks of main crankshaft 5; In conjunction with see Fig. 2 to Fig. 4, secondary crankshaft 3 adopts cylinder axis as its main journal and is fixedly arranged in engine body 6 by clutch shaft bearing 2, one end eccentric setting secondary crankshaft rod journal 7 is connected with piston rod 1, secondary crankshaft rod journal 7 is provided with the poroid groove of kidney-shaped 8 along secondary crankshaft radial direction, be provided with the stiffened edge 11 increasing crankshaft main journal stress surface at the excircle of secondary crankshaft 3, stiffened edge 11 is greater than the balancer weight of all the other positions as secondary crankshaft 3 at the position thickness with secondary crankshaft rod journal 7 symmetry; For improve part working life, the main crankshaft rod journal 10 of main crankshaft 5 is set with sliding shaft sleeve 12 coordinate with the groove 8 of secondary crankshaft 3, realize it turn round in groove 8 and reciprocatingly slide, main crankshaft main journal 9 is fixedly arranged on as engine power output shaft in engine body 6 by the second bearing 4, and its central axis is positioned at above secondary crankshaft 3 central axis.
See Fig. 5, in the present embodiment, the distance between main crankshaft main journal 9 axis and secondary crankshaft 3 axis is h, and the reciprocatingly slide distance of main crankshaft rod journal 10 in groove 8 is for 2h.
In the present embodiment, main crankshaft 5 adopts integral one-piece crankshaft, and secondary crankshaft 3 is adopted releasable bent axle and assembled by bolt.
Specifically see Fig. 5, in the expansion stroke of piston, when the piston is at the top dead center, secondary crankshaft rod journal 7 is positioned at bent axle summit, and main crankshaft rod journal 10 is positioned at the upper summit of groove 8 equally, and the distance of actual crankweb is l, see Fig. 6, piston actuated secondary crankshaft 3 rotates clockwise 90 °, the angle that now main crankshaft 5 rotates obviously is greater than 90 °, concrete analysis finds, secondary crankshaft 3 is equivalent to the bent axle in available engine, when piston is near top dead center and runs identical stroke downwards, the corner that main crankshaft 5 in the present embodiment exports is obviously larger, now High Temperature High Pressure in piston cylinder, heat energy is maximum value, in this one-phase, more heat energy converts the kinetic energy of crank rotation downwards to from the process that top dead center does work at piston, see Fig. 7, piston arrives lower dead center, main crankshaft 5 and secondary crankshaft 3 rotate 180 ° simultaneously, main crankshaft rod journal 10 reaches the lower summit of groove 8, the distance of actual crankweb reaches and is lmax to the maximum, in the process of piston arrives lower dead center, heat energy in piston cylinder reduces gradually, the distance l of actual crankweb then increases gradually, merit needed for crank rotation is corresponding minimizing also, in piston arrives after bottom dead center, piston expansion stroke in the present embodiment terminates, other piston starts expansion stroke and drives this backward stroke of the piston in motor, remaining toxic emission in piston cylinder is gone out.Fig. 8 is the position view of bent axle in backward stroke of the piston process, its positional structure and Fig. 6 symmetry.
Claims (3)
1. a reciprocating-piston engine vuilt-up crankshaft, it is characterized in that: comprise main crankshaft (5) and secondary crankshaft (3), described main crankshaft (5) adopts available engine bent axle, and described secondary crankshaft (3) is located between two main journal cranks of main crankshaft (5); Described secondary crankshaft (3) adopts cylinder axis to be fixedly arranged in engine body (6) as its main journal, its end face eccentric is provided with secondary crankshaft rod journal (7) and is connected with piston rod (1), secondary crankshaft rod journal (7) is provided with groove (8) along secondary crankshaft radial direction, and described groove (8) is waist shaped hole groove; Rotatable and reciprocatingly slide in the groove (8) that main crankshaft rod journal (10) is inserted into secondary crankshaft rod journal (7), described main crankshaft main journal (9) is fixedly arranged on as engine power output shaft in engine body (6), and its central axis is positioned at above secondary crankshaft (3) central axis; The reciprocatingly slide distance of described main crankshaft rod journal (10) in groove (8) equals the twice of described main crankshaft main journal (9) central axis and secondary crankshaft (3) central axis distance.
2. a kind of reciprocating-piston engine vuilt-up crankshaft according to claim 1, is characterized in that: be provided with the stiffened edge (11) increasing described secondary crankshaft main journal and engine body stress surface at the excircle of secondary crankshaft (3).
3. a kind of reciprocating-piston engine vuilt-up crankshaft according to claim 2, is characterized in that: described stiffened edge (11) is greater than the balancer weight of all the other positions as secondary crankshaft (3) at the position thickness symmetrical with secondary crankshaft rod journal (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210569413.2A CN103016509B (en) | 2012-12-25 | 2012-12-25 | A kind of reciprocating-piston engine vuilt-up crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210569413.2A CN103016509B (en) | 2012-12-25 | 2012-12-25 | A kind of reciprocating-piston engine vuilt-up crankshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103016509A CN103016509A (en) | 2013-04-03 |
| CN103016509B true CN103016509B (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210569413.2A Expired - Fee Related CN103016509B (en) | 2012-12-25 | 2012-12-25 | A kind of reciprocating-piston engine vuilt-up crankshaft |
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| Country | Link |
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| CN (1) | CN103016509B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588088A (en) * | 2017-11-02 | 2018-01-16 | 吉林大学 | A kind of variable bent axle of crank length |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1127838A (en) * | 1995-01-28 | 1996-07-31 | 邱垂西 | Cylinder piston structure |
| CN1350127A (en) * | 2000-10-20 | 2002-05-22 | 唐纳德·G·利思 | Structure of crank composed of multi-parts |
| CN1470772A (en) * | 2002-07-24 | 2004-01-28 | 三星光州电子株式会社 | Method for manufacturing crankshaft of closed reciprocating compressor |
| CN1555465A (en) * | 2001-08-24 | 2004-12-15 | 肯德尔・利・斯潘格勒 | Crankshaft with continuous main journal and corresponding connecting structure |
| CN101025185A (en) * | 2006-02-24 | 2007-08-29 | 曼柴油机欧洲股份公司 | Crankshaft of a four-stroke diesel engine of construction, in particular for medium-speed operation |
| EP1591681B1 (en) * | 2004-04-26 | 2008-02-20 | HONDA MOTOR CO., Ltd. | Bearing structure |
-
2012
- 2012-12-25 CN CN201210569413.2A patent/CN103016509B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1127838A (en) * | 1995-01-28 | 1996-07-31 | 邱垂西 | Cylinder piston structure |
| CN1350127A (en) * | 2000-10-20 | 2002-05-22 | 唐纳德·G·利思 | Structure of crank composed of multi-parts |
| CN1555465A (en) * | 2001-08-24 | 2004-12-15 | 肯德尔・利・斯潘格勒 | Crankshaft with continuous main journal and corresponding connecting structure |
| CN1470772A (en) * | 2002-07-24 | 2004-01-28 | 三星光州电子株式会社 | Method for manufacturing crankshaft of closed reciprocating compressor |
| EP1591681B1 (en) * | 2004-04-26 | 2008-02-20 | HONDA MOTOR CO., Ltd. | Bearing structure |
| CN101025185A (en) * | 2006-02-24 | 2007-08-29 | 曼柴油机欧洲股份公司 | Crankshaft of a four-stroke diesel engine of construction, in particular for medium-speed operation |
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| Publication number | Publication date |
|---|---|
| CN103016509A (en) | 2013-04-03 |
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