CN1046018A - Wind cooling rotor type internal combustion engine - Google Patents

Abstract

The invention belongs to rotary piston RC engine, wind cooling rotor type internal combustion engine particularly, it comprises circular cylinder body and its interior rotor is set, cylinder cap and seal arrangement thereof, because circular cylinder body of the present invention and interior rotor thereof have been formed two different cylinders of volume, promptly make air-breathing and compression, expansion and exhaust become two cylinders that carry out synchronously with cylinder, compression envelope valve is set and the envelope valve etc. that expands simultaneously on cylinder body, make like this utlity model has simple in structure, manufacturing easily, it is low to wear and tear, characteristics such as thermal efficiency height are a kind of novel rotary piston RC engines.

Description

Wind cooling rotor type internal combustion engine

The invention belongs to rotary piston RC engine, particularly wind cooling rotor type internal combustion engine.

The kind of rotary piston RC engine is a lot of at present, but practical application and representative have three-apexed rotor (piston) rotary combustion engine, as the 49th page of introduction in rotary piston engine one book of publishing by Science Press in 1973, this internal-combustion engine comprises the cylinder body with epitrochoid face, the equilateral triangle rotor, power output shaft, eccentric shaft, cylinder cap, a pair of phasing gears, the radial seal pad, end face seal pad and spark plug etc., its working procedure is that the rotor of equilateral triangle is under the effect of eccentric shaft and a pair of phasing gears, rotate with respect to cylinder body and form the working room of three variable volume with a definite form, finish air-breathing, compression, expand, work cycle of exhaust.Chinese patent CN85105764 number a kind of air-cooled impeller minor internal-combustion engine is also disclosed in the recent period, its main structure is two air chambers that air-cooled four leaf rotors have constituted mutual sealing, four leaves are formed four working part, left side air chamber is air inlet, press part, right air chamber is expansion, exhaust portion, top is compression displacement portion, and is furnished with one-way valve.Its working procedure is: combination gas enters air input part from left air inlet of air chamber, by blade combination gas is compressed at press part then, combination gas after the compression is entered the bulge igniting work done of right air chamber by upper one-way valve, waste gas after burning is finished a work cycle outside the relief opening discharge machine of exhaust portion.Because there is following deficiency in above-mentioned two kinds of rotary internal combustion engines, so its use is restricted.At first, the former three-apexed rotor is by an eccentric shaft and a pair of respective gears it to be moved in cylinder body, this structure is complicated, the required precision height, the sealing and the bad solution of wear problem, though and the latter is simple in structure, required precision is low, but the variation of each working part volume is to make its rotation in cylinder body realize that sealing effect is bad like this by blade, and the wearing and tearing aggravation; Next be since in air-breathing, the compression, expansion, exhaust process each working part volume of cylinder identical, just be difficult to reduce the outlet temperature when expanding, seal in addition and wear and tear greatlyyer, cause the thermal efficiency to reduce; Secondly be exactly again air-cooled vane rotor formula internal-combustion engine in the course of the work, combination gas after the compression is when one-way valve enters the firing chamber, it once enter the igniting situation under, because mixture combustion is rapid, pressure increases severely, easily make one-way valve produce plug-back, it is insufficient that combination gas enters bulge, perhaps under the situation of limit leading edge burning, also can cause adverse consequences, and igniting again after combination gas all enters bulge will make expansion displacement diminish, and these situations all will cause the reduction of the thermal efficiency; Air-breathing, the compression, expansion, the exhaust process that are above-mentioned two kinds of internal-combustion engines secondarily are to carry out in the identical cylinder of volume, are difficult to reduce the outlet temperature when expanding, and also will cause the reduction of the thermal efficiency.

The present invention is directed to the deficiencies in the prior art and improve, provide a kind of manufacturing simple in structure, easy, wearing and tearing gentlier to reach the higher wind cooling rotor type internal combustion engine of the thermal efficiency.

The present invention is achieved in the following way: a kind of wind cooling rotor type internal combustion engine, comprise circular cylinder body and its interior rotor, cylinder cap and seal arrangement thereof is set, circular cylinder body of the present invention and the rotor that is provided with in it have been formed two different cylinders of volume, one is the air-breathing air-breathing compression cylinder that carries out synchronously with cylinder with compression process, another for expand and exhaust process with the cylinder exhaust cylinder that expands synchronously, and the volume of expansion exhaust cylinder is greater than the volume of air-breathing compression cylinder; The upper dead center of circular cylinder body is provided with compression valve, and its right dead point is provided with the envelope valve that expands; On the rotor radially two ends, the left and right sides be provided with radial seal pad I and radial seal pad II, and be provided with intake duct and air outlet flue at an end of radial seal pad I.

The volume of said expansion exhaust casing is 2.28～3.85 times of air-breathing compression volume of cylinder, because air-breathing, the compression of existing internal-combustion engine, expansion, exhaust process are to carry out in same cylinder, and volume of cylinder is identical, therefore, the expansion working process is a kind of incomplete thermal expansion process, exhaust has just caused 3～6 atmospheric thermal loss of expansion terminal point in advance in addition.So the present invention has taked the design concept of the volume of expansion exhaust casing greater than air-breathing compression volume of cylinder, according to equation of gaseous state P ₁V k ₁=P ₂V k ₂, as can be known, the cylinder of supposing existing internal-combustion engine is 1 volume unit, expansion terminal pressure was 1 barometric pressure, i.e. V after diffusion was expanded ₁Be 1 volume unit, P ₁Be 3 or 6 barometric pressure, P ₂Be 1 barometric pressure, ask V ₂Work as P ₁When being 3 barometric pressure, then

${\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="891018980\_DRIMG1.png,891018980\_DRIMG2.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=\text{exception 25:}{V}_{}{}_1\&CenterDot;\sqrt[K]{\frac{P_1}{P_2}}=1\&CenterDot;\sqrt[1.33]{\frac{3}{1}}=2.28(K=1.33)$

。Work as P ₁When being 6 barometric pressure, can calculate according to following formula equally

${\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="891018980\_DRIMG1.png,891018980\_DRIMG2.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=1\&CenterDot;\sqrt[1.33]{\frac{6}{1}}3.85$

。So the volume of expansion exhaust cylinder is 2.28～3.85 times of air-breathing compression volume of cylinder.In addition, according to engine cycle thermal efficiency formula η _i=1-(λ ρ ^K-ξ ^K-1)/((ε ξ) ^K-1[(λ-1)+K λ (ρ-1)]) as can be known: λ ρ ^k＞ξ＞1 promptly expand the volume of exhaust casing be air-breathing compression volume of cylinder ξ doubly, i.e. λ ρ ^k＞ξ＞1, or 3.84＞ξ＞2.28.

Said compression envelope valve can be by compression baffle plate I and compression baffle plate II and the connecting plate between them, seal ring I on the connecting plate, the spring I, the spring III, spring sheet is formed, said expansion envelope valve is by expansion baffle plate and spring II thereof, the seal ring II is formed, their control corresponding mechanisms are made up of half cycle dome slideway and another half cycle groove slideway in the rotor circumference surface design, wherein dome slideway and groove slideway are rounding ofves along the rotor circumference connecting part, semi-circumference centre of surface place at rotor leaves circular fin, and both sides cut equal groove, promptly become the recessed dome slideway in intermediate projections both sides, groove is made in second half circumferential surface center of respective rotor, and both sides keep fin, promptly become the groove slideway opposite just with the dome slideway, the two connecting part rounding off seals valve and the purpose of the envelope valve that expands thereby reach intermittently control compression.

Said compression envelope valve also can adopt by reduced overall baffle plate (it can replace compressing baffle plate I and compression baffle plate II and the connecting plate between them), seal ring I, spring I are formed, but the envelope that expands valve still is made up of expansion baffle plate and spring II thereof, seal ring II, their control corresponding mechanisms are fixed on eccentric wheel on the power output shaft by employing and the tappet of drive is formed, directly drive tappet when promptly being fixed on the eccentric wheel rotation on the power output shaft, tappet drives also control compression at intermittence envelope valve and expansion envelope valve then.

Said compression envelope valve is vertical mutually with the axial direction of the envelope valve that expands, and the two intersection point on circular cylinder body is 0～90 ° with respect to the angular range in the circular cylinder body center of circle.

Its working procedure is: air or flammable mixed gas at first enter air-breathing compression cylinder (as shown in Figure 6) from epitrochanterian intake duct, when driving pressure of inspiration(Pi), rotor contracts cylinder and expansion exhaust cylinder when rotating in the counterclockwise direction, the envelope valve is still in right dead point under the effect of dome slideway or tappet owing to expand, and compression envelope valve tightly acts on the top (as shown in Figure 7) of rotor under the effect of its spring I, and with the air in the air-breathing compression cylinder or flammable mixed gas by inverse time rotor rotated extruding the time and be enclosed in and obtain compression in the firing chamber, and air in the air-breathing compression cylinder or flammable mixed gas are compressed the envelope air valve seal in the firing chamber, form not only the vacuum space on the left side of compression envelope valve and the air used from intake duct but also the next thermal cycle of inspiration or flammable mixed gas (as Fig. 8, shown in 9).When rotor continues rotation, compression envelope valve is still in upper dead center under the effect of slick and sly road of rotor epirelief or tappet, expansion exhaust cylinder and epitrochanterian radial seal pad I and the envelope valve that expands are removed state of rest from right dead point, and under the effect of spring II, tightly act on the rotor bottom, the air or the flammable mixed gas of compression are enclosed in the firing chamber, at this moment oil spout and ignition produce pressurized gas and work done, and last circuit waste gas is outside air outlet flue is discharged machine (as shown in figure 10) in the exhaust casing that expands simultaneously.At this moment oil spout or ignition produce and promote the rotor work done after high temperature and high pressure gas expands, and the waste gas of last thermal cycle simultaneously continues outside air outlet flue is discharged machine (as shown in figure 11).At present, air-breathing, the compression of existing internal-combustion engine, expansion, exhaust are to carry out in same cylinder, and volume of cylinder is identical, and the outlet temperature when in addition compressing is the outlet temperature when expanding always, according to equation of gaseous state P ₁V ₁/ T ₁=P ₂V ₂/ T ₂As can be known, the terminal pressure P during expansion ₂Generally greater than critical pressure P ₁3～6 barometric pressure, therefore cause heat loss big, and the present invention is owing to adopt compression envelope valve and the new structural type of expand envelope valve and circular cylinder body and rotor, make cylinder air-breathing and that boil down to carries out synchronously with cylinder, the cylinder that expansion and exhaust are carried out synchronously with cylinder, and the latter's volume is 2.28～3.85 times of the former volume, thereby terminal pressure drops near critical pressure P and improved the thermal efficiency (can improve the thermal efficiency and reach 40～50%) when expanding.

The present invention compares with prior art, has simple in structure, easy processing, the little and thermal efficiency of wearing and tearing than characteristics such as height.

Fig. 1 is first kind of overall construction drawing of the present invention.

Fig. 2 is the A-A sectional drawing that the present invention adopts first kind of overall construction drawing of radial seal pad I, II.

Fig. 3 is the A-A sectional drawing that the present invention does not adopt first kind of overall construction drawing of radial seal pad I, II.

Fig. 4 is second kind of overall construction drawing of the present invention.

Fig. 5 is the A-A sectional drawing of second kind of overall construction drawing of the present invention.

Fig. 6-the 11st, working principle schematic representation of the present invention.

Among the figure: 1 circular cylinder body, 2 rotors, 3 radiating fin, 4 radial seal pad I, 5 expand seals valve, 6 spring II, 7 expansion baffle plates, 8 right dead points, 9 seal ring II, 10 firing chambers, 11 spark plugs or oil nozzle mounting hole, 12 compression envelope valves, 13 upper dead centers, 14 spring I, 15 compression baffle plates, 16 seal ring I, 17 rotor tops, 18 air-breathing compression cylinders, 19 intake ducts, 20 radial seal pad II, 21 air outlet flues, 22 cooling air channels, 23 expansion exhaust cylinders, 24 rotor bottoms, 25 circular cylinder body bases, 26 cylinder caps, 27 eccentric wheels, 28 seal ring III, 29 bearings, 30 air inlet cavitys, 31 flanges, 32 tappets, 33 diaphragm seals, 24 reduced overall baffle plates, 35 seal ring IV, 36 exhaust cavities, 37 groove slideways, 38 spring sheets, 39 compression baffle plate I, 40 compression baffle plate II, 41 connecting plates, 42 dome slideways, 43 spring III, 44 power output shafts.

Most preferred embodiment of the present invention, shown in Fig. 1-11, a kind of wind cooling rotor type internal combustion engine, comprise circular cylinder body 1 and its interior rotor 2, cylinder cap 26 and seal arrangement thereof is set, circular cylinder body 1 of the present utility model and the rotor 2 that is provided with in it have been formed different two cylinders 18,23 of volume, one is air-breathing compression cylinder 18 air-breathing and that compression is carried out synchronously with cylinder, another is the expansion exhaust cylinder 23 that expands and exhaust is carried out synchronously with cylinder, and the volume of expansion exhaust cylinder 23 is greater than the volume of air-breathing compression cylinder 18; The upper dead center 13 of circular cylinder body 1 is provided with compression envelope valve 12, and its right dead point 8 is provided with the envelope valve 5 that expands; On the rotor 2 radially two ends, the left and right sides be provided with sealing gasket I 4 and sealing gasket II 20, and be provided with intake duct 19 and air outlet flue 21 at an end of sealing gasket I 4.Two cylinders 18,23 that above-mentioned in addition said volume is different, steady for making engine running, also can adopt four cylinders or six cylinders, other each mechanism and component are made respective design.

The volume of said expansion exhaust cylinder is 2.28～3.85 times of air-breathing compression volume of cylinder.

Said compression envelope valve 12 can be by compression baffle plate I 39 and compression baffle plate II 40 and the connecting plate 41 between them, seal ring I 16 on the connecting plate 41, spring I 14 spring III 43, spring sheet 38 is formed, said expansion envelope valve is by expansion baffle plate 7 and spring II 6 thereof, seal ring II 9 is formed, their control corresponding mechanisms are by forming at half cycle dome slideway 42 and another half cycle tongue slideway 37 of the design of rotor 2 circumferential surfaces, wherein, dome slideway 42 is rounding ofves with groove slideway 37 along rotor 2 circumference connecting parts, semi-circumference centre of surface place at rotor 2 leaves circular fin, both sides cut equal groove, promptly become the recessed dome slideway 42 in intermediate projections both sides, groove is made at the semi-circumference centre of surface place of respective rotor 2, and both sides keep fin, promptly become just the groove slideway 37 opposite with dome slideway 42, the two connecting part rounding off promptly adopts circular arc to join, and seals valve 12 and the purpose of the envelope valve 5 that expands thereby reach intermittently control compression.

Said compression envelope valve 12 also can adopt by reduced overall baffle plate 34, seal ring I 16, spring I 14 is formed, but the envelope that expands valve 5 is still by expansion baffle plate 7 and spring II 6 thereof, seal ring II 9 is formed, their control corresponding mechanisms are fixed on the eccentric wheel 27 on the power output shaft 44 by employing and the tappet 32 that drives is formed, above said reduced overall baffle plate 34 can replace compressing baffle plate I 39 and compression baffle plate II 40 and the connecting plate between them 41, this spline structure can be simplified, directly drive tappet 32 when being fixed on eccentric wheel 27 rotations on the power output shaft 2, tappet 32 drives and control compression at intermittence envelope valve 12 and expansion envelope valve 5 then.

Said compression envelope valve 12 is vertical mutually with the axial direction of the envelope valve 5 that expands, and the two intersection point on circular cylinder body 1 is 0～90 ° with respect to the angular range in circular cylinder body 1 center of circle.

In a word, first kind of structure of the present invention is to adopt conventional design, as Fig. 1, shown in Figure 2: if adopt the pottery or the rate materials with smaller of expanding with heat and contract with cold, can cancel radial seal pad I 4 and radial seal pad II 20 in the above-mentioned conventional design, as Fig. 1, shown in Figure 3, but, above in two kinds of situations the control mechanism about compression envelope valve 12 all adopt eccentric wheel 27 and tappet 32 to control, for making designs simplification, manufacturing is easy, can cancel eccentric wheel 27 and tappet 32, the control mechanism of i.e. compression envelope valve 12 adopts at the half cycle dome slideway 42 of rotor 2 circumferential surfaces design and another half cycle groove slideway 37 directly drives or the structural type of control at intermittence, as Fig. 4, shown in Figure 5.

Claims (5)

1, a kind of wind cooling rotor type internal combustion engine comprises circular cylinder body and its interior rotor, cylinder cap and seal arrangement thereof is set, and feature of the present invention is:

A, circular cylinder body and the rotor that is provided with in it have been formed two different cylinders of volume, one is the air-breathing air-breathing compression cylinder that carries out synchronously with cylinder with compression process, one is the expansion exhaust cylinder that expands and exhaust process is carried out synchronously with cylinder, and the volume of expansion exhaust cylinder is greater than the volume of air-breathing compression cylinder;

The upper dead center of b, circular cylinder body is provided with compression envelope valve, and its right dead point is provided with the envelope valve that expands;

On c, the rotor radially two ends, the left and right sides be provided with radial seal pad I and radial seal pad II, and be provided with intake duct and air outlet flue at an end of radial seal pad I.

2, wind cooling rotor type internal combustion engine as claimed in claim 1, the volume of the exhaust cylinder that it is characterized in that expanding are 2.28～3.85 times of air-breathing compression volume of cylinder.

3, wind cooling rotor type internal combustion engine as claimed in claim 1, it is characterized in that said compression envelope valve can by compression baffle plate I and compression baffle plate II and between them the seal ring I on connecting plate, the connecting plate, spring I, spring III, spring sheet form, said expansion envelope valve is made up of expansion baffle plate and spring II thereof, seal ring II, and their control corresponding mechanisms are by forming at the half cycle dome slideway of rotor circumference surface design and the groove slideway of another half cycle.

4, wind cooling rotor type internal combustion engine as claimed in claim 1, it is characterized in that said compression envelope valve also can be made up of reduced overall baffle plate, seal ring I, spring I, but the envelope that expands valve still is made up of expansion baffle plate and spring II thereof, seal ring II, and their control corresponding mechanisms are made up of eccentric wheel and drive tappet thereof that employing is fixed on the power output shaft.

5, as the described wind cooling rotor type internal combustion engine of claim 1-4, it is characterized in that said compression envelope valve is vertical mutually with the axial direction of the envelope valve that expands, the two intersection point on circular cylinder body is 0～90 ° with respect to the angular range in the circular cylinder body center of circle.

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