CN101509423A - Hypocycloid single cylinder diesel - Google Patents

Hypocycloid single cylinder diesel Download PDF

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Publication number
CN101509423A
CN101509423A CNA2009100381661A CN200910038166A CN101509423A CN 101509423 A CN101509423 A CN 101509423A CN A2009100381661 A CNA2009100381661 A CN A2009100381661A CN 200910038166 A CN200910038166 A CN 200910038166A CN 101509423 A CN101509423 A CN 101509423A
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CN
China
Prior art keywords
hypocycloid
bent axle
single cylinder
piston
cylinder diesel
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Pending
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CNA2009100381661A
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Chinese (zh)
Inventor
杜群贵
薛运锋
朱俊鹏
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South China University of Technology SCUT
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South China University of Technology SCUT
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Priority to CNA2009100381661A priority Critical patent/CN101509423A/en
Publication of CN101509423A publication Critical patent/CN101509423A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a hypocycloid single cylinder diesel which replaces the traditional crank link mechanism with a set of novel hypocycloid energy transformation mechanism to realize the interconversion of the complete linear movement of the piston and the rotary movement of the crankshaft and to output power. A left crankshaft (8) and a right crankshaft (11) of the hypocycloid energy transformation mechanism are respectively mounted at the left and right sides of a case (5) by bearings; the left crankshaft (8) and the right crankshaft (11) are respectively connected with a central eccentric crank shaft (13) by two slide bearings (17); two planet gears (9) are provided in the invention which are fixed at the two ends of the central eccentric crank shaft (13); the two planet gears (9) are respectively meshed with two annular gears fixed at the case to form two pairs of gears. Compared with the traditional crank link mechanism type single cylinder diesel, the hypocycloid single cylinder diesel eliminates the side pressure of the piston on the cylinder, has the advantages of high transmission efficiency, low fuel oil consumption and high output power.

Description

A kind of Hypocycloid single cylinder diesel
Technical field
The present invention relates to a kind of diesel engine, particularly relate to a kind of Hypocycloid single cylinder diesel.
Background technique
At present, internal-combustion piston engine is widely used in all trades and professions such as communications and transportation, farm machinery, engineering machinery and dynamic power of sea route sky.But in this internal-combustion piston engine as shown in Figure 1, comprise casing 1, piston 2, connecting rod 3 and bent axle 4; In casing 1, connecting rod 3 two ends are connected with bent axle 4 with piston 2 respectively; This device exists intrinsic shortcoming, and 3 pairs of pistons of connecting rod 2 of promptly doing reciprocal oscillating motion inevitably produce lateral forces, and cause piston set to do transversal translation and rotary oscillation in cylinder, wherein this lateral force finally by piston action in cylinder wall.Be exactly that this lateral force and piston set are done transversal translation and rotary oscillation in cylinder, become the technical barrier that the scientific worker is difficult to go beyond, cause the following problem of internal-combustion engine:
(1) lateral force is bounced cylinder wall, can produce to be commonly called as " engine knock " phenomenon, is mechanicalness noise source maximum in the internal-combustion engine, and has a strong impact on service life of engine.Between actual internal combustion engine and the cylinder certain interval is arranged, when connecting rod is done the motion of reciprocal beat, lateral force causes piston near upper and lower stop, from being close to cylinder one side oscillation to being close to the cylinder opposite side, be waving and laterally moving of piston generation, cylinder is produced strong panting action, generation vibration and noise.This vibration easily makes and cellular cavitation pitting occurs on cylinder liner and the local surfaces that cooling water contacts and destroy.In addition, connecting rod small end is reciprocating, and major part rotates, and has the connecting rod of distributed mass just to produce angular acceleration, moment of inertia and swings, and this inertia pendulum power also becomes the horizontal vibrating source of motor.
(2) lateral force makes piston and cylinder produce friction, wearing and tearing, causes the lot of energy loss, influences Economy, the power character of internal-combustion engine, and the working life of serious harm internal-combustion engine and reliability.Friction pair between piston and the cylinder is one of most important friction pair in the internal-combustion engine, and its frictional loss occupies very big proportion in the frictional loss of entire internal combustion engine, is equivalent to more than 40%, generally all 50~60% of the total machinery loss of motor.And connecting rod is intrinsic, piston action has often accounted for more than 30% of this frictional loss in the frictional loss of the side pressure generation of cylinder.
(3) the traditional crank linkage mechanism has increased the manufacture difficulty of piston to the lateral force of cylinder.During pistons work, gas pressure is uniform to act on the piston head, the support reaction that wrist pin gives then acts on the key seat place of piston crown, the distortion of Chan Shenging makes the skirt section diameter increase along the piston pin boss axial direction therefrom, and the effect of lateral force also makes the piston skirt diameter increase on same direction.In light of this situation, for make piston when the proper functioning and cylinder wall keep gap relatively uniformly, avoid stuck or concentrated wear, piston must be processed into the skirt section section for oval, strengthened the manufacture difficulty of piston, increased manufacture cost.
Summary of the invention
In order to overcome the shortcoming of conventional piston formula internal-combustion engine, the invention provides a kind of conversion that can realize straight line motion and crankshaft rotating motion, eliminate the side pressure that piston produces cylinder, reduce friction, the wearing and tearing of piston and cylinder, improve the Hypocycloid single cylinder diesel of the power character and the Economy of internal-combustion engine.
Purpose of the present invention is by realizing with lower device:
A kind of Hypocycloid single cylinder diesel, comprise casing, piston and connecting rod, in casing, piston is connected with connecting rod: described Hypocycloid single cylinder diesel also comprises the hypocycloid energy transfer mechanism, and described hypocycloid energy transfer mechanism comprises planetary pinion, fixedly ring gear, left bent axle, right bent axle and middle eccentric crankshaft; Described left bent axle and right bent axle are contained in the casing left and right sides by bearing respectively; The throw of eccentric of left side bent axle, right bent axle equals planetary radius; Left side bent axle is connected with middle eccentric crankshaft respectively by two sliding bearings with right bent axle, forms revolute pair; Described planetary pinion is 2, is separately fixed at the two ends of middle eccentric crankshaft, is positioned at the inboard of left bent axle and right bent axle; Two planetary pinions form two gear pairs with two ring gear engagements that are fixed on the casing respectively; Middle eccentric crankshaft is connected with connecting rod; Planetary radius equals half of fixing ring gear radius.
Be further to realize goal of the invention, the described planetary number of teeth is half of the number of teeth of fixing ring gear.
The two ends of eccentric crankshaft in the middle of described planetary pinion is separately fixed at by hot-mounting process.
The line of eccentricity of eccentric crankshaft is positioned on the planetary pitch circle in the middle of described.
Eccentric crankshaft is connected with the major part of connecting rod by bearing in the middle of described.
Described Hypocycloid single cylinder diesel also comprises flywheel and trunnion shaft; Described flywheel is fixed on the right bent axle, and trunnion shaft has 2, is positioned at the lower end of casing, is separately fixed on the both sides, front and back of casing.
Compare with traditional crank connecting rod piston formula internal-combustion engine, the present invention has the following advantages:
(1) Hypocycloid single cylinder diesel piston and connecting rod are fixed together, do pure straight line motion along cylinder in theory, cylinder there are not side pressure, side grinding, eliminated in the traditional crank linkage mechanism, connecting rod produces a lateral force inevitably to piston, and cause piston in cylinder, to do transversal translation and swing, and eliminated piston to bouncing that cylinder causes, reduced vibration and noise.
(2) because the piston rod group is done straight line motion, reduced friction, the wearing and tearing of piston, improved the operating life of piston and cylinder, reduced energy loss, had with under the constant power advantage that fuel consume is few, serviceability is high cylinder.
(3) novel single cylinder diesel piston and connecting rod are done the simple harmonic quantity straight line motion, do not have two-stage reciprocating inertia force, have reduced the vibration of system, and machine run is more steady.
(4) can conveniently on conventional piston formula internal-combustion engine basis, carry out the transformation of Hypocycloid single cylinder diesel.
Description of drawings
Fig. 1 conventional piston formula Principles of Internal-Combustion Engine figure.
Fig. 2 a is the Hypocycloid single cylinder diesel schematic diagram.
Fig. 2 b is the right elevation of Fig. 2 a.
Fig. 3 is the Hypocycloid single cylinder diesel structural representation.
Fig. 4 is a hypocycloid energy transfer mechanism structural representation.
Fig. 5 is planetary pinion and middle crankshaft installed schematic representation.
Fig. 6 is planetary pinion, right bent axle, middle bent axle, fixing ring gear scheme of installation.
Fig. 7 a is gear ring and casing scheme of installation.
Fig. 7 b is that the G-G of Fig. 7 a is to sectional view.
Embodiment
For further understanding the present invention, the present invention is further illustrated below in conjunction with drawings and embodiments, but the scope of protection of present invention is not limited to the scope of mode of execution statement.
Shown in Fig. 2 a, Fig. 2 b, Fig. 3, Fig. 4 and Fig. 7 b, Hypocycloid single cylinder diesel comprises casing 5, flywheel 15, piston 6, connecting rod 7, trunnion shaft 14 and hypocycloid energy transfer mechanism, flywheel 15 is fixed on the right bent axle 11, trunnion shaft 14 has 2, be positioned at the lower end of casing 5, be separately fixed on the both sides, front and back 19 of casing, by eccentric double-shaft mechanism equalizing piston reciprocal inertia force.The hypocycloid energy transfer mechanism comprises left bent axle 8, right bent axle 11, middle eccentric crankshaft 13 and planetary pinion 9; Left side bent axle 8 and right bent axle 11 are contained in casing 5 left and right sides by bearing respectively, left bent axle 8 left end connection gear chamber assemblies, and gear chamber assembly is connected with oil pump, distribution device etc.; The throw of eccentric of left side bent axle 8, right bent axle 11 equals the radius of planetary pinion 9; Left side bent axle 8, right bent axle 11 cooperate two revolute pairs of formation with middle eccentric crankshaft 13; Specifically be that left bent axle 8 is connected with middle eccentric crankshaft 13 respectively by two sliding bearings 17 with right bent axle 11, form revolute pair.
Shown in Fig. 5,6, planetary pinion 9 is 2, and the two ends of eccentric crankshaft 13 in the middle of being separately fixed at by hot-mounting process are positioned at the inboard of left bent axle 8 and right bent axle 11; Two planetary pinions 9 cooperate with ring gear 10 on being fixed on casing and form two gear pairs, and planetary pinion 9 and ring gear 10 gear ratios that are fixed on the casing are 1: 2.Shown in Fig. 6,7a, 7b, ring gear 10 be 2 respectively with the engagement of two planetary pinions 9, gear ring 10 affixed fixing bodies are fixed on the casing 5 by this fixing body and screw or pin.Middle eccentric crankshaft 13 is connected with the major part of connecting rod 7 by bearing 16; The microcephaly of piston 6 and connecting rod 7 is fixed together.As Fig. 2 a and shown in Figure 6, the radius of planetary pinion 9 equals half of fixing ring gear 10 radiuses.Shown in Fig. 2 b, the central lines of the center line of ring gear 10 and left bent axle 8, right bent axle 11.As shown in Figure 5, the major part of bearing 16 cover connective poles 7, the center line of bearing 16 overlaps with middle eccentric crankshaft 13 line of eccentricity 18, a bit on the pitch circle that middle eccentric crankshaft 13 off-centre are planetary pinion 9.Shown in Fig. 2 a, according to the hypocycloid principle, when a pair of involute gear was formed internal meshing pair, the movement locus of any was a hypocycloid on the internal gear standard pitch circle.When the radius of ring gear 10 is the twice of radius of planetary pinion 9, on planetary pinion 9 standard pitch circles arbitrarily the track of any be straight line by gear ring center, be that hypocycloid is a straight line, its motion is the simple harmonic quantity straight line motion, and this hypocycloid energy transfer mechanism can be realized the straight line motion of piston and the exchange of crankshaft rotating motion.
When power drives left bent axle 8 rotations, the planetary pinion 9 at eccentric crankshaft 13 two ends was done the planet rotation around fixing ring gear 10 in the middle of driving was fixed on, the rotation of planetary pinion 9 simultaneously drives right bent axle 11 and rotates, according to the hypocycloid principle, a bit doing by the fixedly straight reciprocating motion at ring gear 10 centers arbitrarily on middle eccentric crankshaft 13 line of eccentricity 18, thus drive is done linear reciprocating motion with middle eccentric crankshaft 13 forms revolute pair on throw of eccentric connecting rod 7; Piston 6 is fixed together with connecting rod 7, and then piston is done pure linear reciprocating motion along cylinder-bore axis.Otherwise gas pressure promotes piston 6 and connecting rod 7 is done straight line motion in cylinder, and eccentric crankshaft 13 is done planet with planet gear 9 along ring gear 10 and rotated in the middle of then driving, and rotatablely moves output power by what bearing 17 drove left bent axles 8 and right bent axle 11.
Embodiment
Present popular conventional piston formula diesel engine is transformed: the hypocycloid energy transfer mechanism is replaced the traditional crank linkage mechanism.
Shown in Fig. 3,4; According to eccentric double-shaft mechanism equalizing piston reciprocal inertia force trunnion shaft 14 sizes are adjusted, satisfied the requirement of equalizing piston reciprocal inertia force, the profile of casing 5, piston 6 and installation dimension all can be constant.Left bent axle 8, right bent axle 11 are put into respectively on the left and right sides bearing of original bent axle in the casing 5, guaranteed firm smooth operation.Gear ring shown in Figure 6 10 is fixed on casing 5 bottoms by bolt and dowel device.Left side bent axle 8 is connected with middle eccentric crankshaft 13 respectively by two sliding bearings 17 with right bent axle 11, forms revolute pair.Middle eccentric crankshaft 13 two ends fix respectively 9, two planetary pinions 9 of two planetary pinions respectively with the ring gear 10 formative gear pairs that are fixed on the casing 5; The gyration center of middle eccentric crankshaft 13 overlaps with the gyration center of planet gear 9, and throw of eccentric equals left bent axle 8 main journal center lines to half of distance between connecting rod 7 journal axis; Middle eccentric crankshaft 13 is connected by sliding bearing 16 with connecting rod 7, forms revolute pair.Like this, just, traditional crank connecting rod piston formula internal-combustion engine is transformed into the Hypocycloid single cylinder energy-saving diesel engine.
After above-mentioned transformation, the Hypocycloid single cylinder diesel connecting rod piston is fixed to be one, does the simple harmonic quantity straight line motion along cylinder, and piston does not have side pressure to cylinder, has eliminated piston bouncing cylinder; Because piston is done simple harmonic motion, has only the single order reciprocal inertia force, reciprocal inertia force obtains complete equilibrium, has reduced the vibration of internal-combustion engine; The Hypocycloid single cylinder diesel piston is done the simple harmonic quantity straight line motion, and by theoretical analysis and calculation, under same fuel delivery per cycle, mean indicated pressure has improved 10%; Piston does not have side pressure to cylinder, has reduced the frictional loss of internal-combustion engine, has improved the internal-combustion engine output power.

Claims (6)

1, a kind of Hypocycloid single cylinder diesel, comprise casing (5), piston (6) and connecting rod (7), in casing (5), piston (6) is connected with connecting rod (7), it is characterized in that: described Hypocycloid single cylinder diesel also comprises the hypocycloid energy transfer mechanism, and described hypocycloid energy transfer mechanism comprises planetary pinion (9), fixedly ring gear (10), left bent axle (8), right bent axle (11) and middle eccentric crankshaft (13); Described left bent axle (8) and right bent axle (11) are contained in casing (5) left and right sides by bearing respectively; The throw of eccentric of left side bent axle (8), right bent axle (11) equals the radius of planetary pinion (9); Left side bent axle (8) is connected with middle eccentric crankshaft (13) respectively by two sliding bearings (17) with right bent axle (11), forms revolute pair; Described planetary pinion (9) is 2, is separately fixed at the two ends of middle eccentric crankshaft (13), is positioned at the inboard of left bent axle (8) and right bent axle (11); Two planetary pinions (9) form two gear pairs with two ring gears (10) engagement that is fixed on the casing respectively; Middle eccentric crankshaft (13) is connected with connecting rod (7); The radius of planetary pinion (9) equals half of fixing ring gear (10) radius.
2, Hypocycloid single cylinder diesel according to claim 1 is characterized in that: the number of teeth of planetary pinion (9) is half of the number of teeth of fixing ring gear (10).
3, Hypocycloid single cylinder diesel according to claim 1 is characterized in that: the two ends of eccentric crankshaft (13) in the middle of described planetary pinion (9) is separately fixed at by hot-mounting process.
4, Hypocycloid single cylinder diesel according to claim 1 is characterized in that the line of eccentricity (18) of described middle eccentric crankshaft (13) is positioned on the pitch circle of planetary pinion (9).
5, Hypocycloid single cylinder diesel according to claim 1 is characterized in that: eccentric crankshaft (13) is connected with the major part of connecting rod (7) by bearing (16) in the middle of described.
6, according to each described Hypocycloid single cylinder diesel of claim 1~5, it is characterized in that: described Hypocycloid single cylinder diesel also comprises flywheel (15) and trunnion shaft (14); Described flywheel (15) is fixed on the right bent axle (11), and trunnion shaft (14) has 2, is positioned at the lower end of casing (5), is separately fixed on the both sides, front and back (19) of casing.
CNA2009100381661A 2009-03-24 2009-03-24 Hypocycloid single cylinder diesel Pending CN101509423A (en)

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CNA2009100381661A CN101509423A (en) 2009-03-24 2009-03-24 Hypocycloid single cylinder diesel

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Application Number Priority Date Filing Date Title
CNA2009100381661A CN101509423A (en) 2009-03-24 2009-03-24 Hypocycloid single cylinder diesel

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CN101509423A true CN101509423A (en) 2009-08-19

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102477901A (en) * 2010-11-26 2012-05-30 西南交通大学 Multi-cylinder hypocycloid-mechanism internal combustion engine with accessory output shaft structure
CN102477897A (en) * 2010-11-26 2012-05-30 西南交通大学 Arrangement form of accessory output shaft for multi-cylinder hypocycloid-mechanism internal combustion engines
CN108894943A (en) * 2018-06-12 2018-11-27 刘兴亚 A kind of gas compressing equipment
CN112747101A (en) * 2020-12-29 2021-05-04 华南理工大学 Tooth shape design method for double-arc tooth profile harmonic reducer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102477901A (en) * 2010-11-26 2012-05-30 西南交通大学 Multi-cylinder hypocycloid-mechanism internal combustion engine with accessory output shaft structure
CN102477897A (en) * 2010-11-26 2012-05-30 西南交通大学 Arrangement form of accessory output shaft for multi-cylinder hypocycloid-mechanism internal combustion engines
CN108894943A (en) * 2018-06-12 2018-11-27 刘兴亚 A kind of gas compressing equipment
CN112747101A (en) * 2020-12-29 2021-05-04 华南理工大学 Tooth shape design method for double-arc tooth profile harmonic reducer
CN112747101B (en) * 2020-12-29 2022-07-26 华南理工大学 Tooth shape design method for double-arc tooth profile harmonic reducer

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Open date: 20090819