CN1414214A

CN1414214A - Self-balanced rotor engine

Info

Publication number: CN1414214A
Application number: CN01134215A
Authority: CN
Inventors: 张长春
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-26
Filing date: 2001-10-26
Publication date: 2003-04-30
Anticipated expiration: 2021-10-26
Also published as: CN1186524C

Abstract

The present invention relates to a self-balancing internal combustion rotor engine, in which two mutually cross-set rotors concentrically rotate with rotor shaft in an external case. The rotating speed of each rotor is controlled by a special can/roller mechanism. Each rotor has four blades to form eight cylinders. The external case has two air inlets, two air outlets and two ignition plugs set up radialty and symmetrically, for every rotating cycle of rotor shaft, each cylinder implements two complete engine cycles, thereby the engine completes altogether sixteen cycles. The invention also solves the problems of sealing lubricating and cooling. Its advantages are simple structure, high output power ratio, low discharge and noise, high comprehensive efficiency, low cost and high reliability.

Description

The rotary engine of self balancing

Technical field

The present invention relates to rotary engine.More particularly, relate to a kind of rotor that adopts two of cam/roller mechanism controls to report to the leadship after accomplishing a task mutually and place and in a cylindrical shell, make rotor internal-combustion engine with the concentric rotation of rotating shaft.

Technical background

Since nineteen fifties, Wankel RC configuration turned round successfully, obtained extensive studies.Existing relatively Reciprocating engine, the most tangible advantage of Wankel RC configuration are output powers than high, shake little, the low and reliability height of noise.All next relatively poor combustion efficiency and the discharging of Wankel RC configuration and body is not significantly improved always, particularly in low load range.These shortcomings are to stop it to obtain extensive due main cause.Modern motor is needed to be a kind of high-output power ratio that had both had Wankel RC configuration, and low vibrations/noise and high reliability feature have the performance and the cheap advantage simple in structure of high burning efficiency low emission again.

In concept, Wankel RC configuration is a kind of in the rotary engine of many feasible programs.The rotary engine notion that has proposed at present can be divided into four classes basically.The first kind, rotor are made the off-axis heart and are rotated in a curved surface cavity, claim eccentric rotary again, and Wankel RC configuration is typical case's representative wherein; Second class, two rotors of placing of reporting to the leadship after accomplishing a task are mutually done to rotate with rotating shaft is concentric in a cavity, claim scissors campaign-styled again; The 3rd class causes piston reciprocates or rotor rotation when outer cylinder body rotates, claim cylinder body rotary again; The 4th class, the rotor between the cam that two curved surfaces change vertically are positioned at rotor diameter with concentric rotation of rotating shaft blade rotates and axial motion simultaneously, claims the axial rotation formula again.

Because motor of the present invention belongs to second class, below relevant background technique is described further.The difference of the campaign-styled rotary engine of scissors that has proposed at present mainly is on the mechanical control method of rotor rotation.First kind of mode is to adopt planetary pinion, linkage mechanism or both combinations, for example U. S. Patent 3144007 (Kauertz, 1964), 3356079 (Rolfsmeyer, 1967), 3592571 (Drury, 1971), 4068985 (Baer, 1976), 5433179 (Wittry, 1996), 5622149 (Wittry, 1997), Chinese patent 91201678 (Luo Yong, 1992), 97100254 (Fu Wei, 1998), 99251858 (Shen Jinfeng, 2000).The common shortcoming of this class mechanism is not possess the ability thereby the poor reliability of bearing high loading and impact, and its mechanical efficiency is also doubtful.The second way is to adopt cam/roller or similar means, and cam/roller mechanism is a kind of malleation contact device, can reduce vibration and impact thereby improve reliability and smooth operation.Adopt the main patent of the campaign-styled rotary engine of scissors of cam/roller or similar means to comprise U. S. Patent 2734489 (Tschudi, 1956), 3221716 (Careddu, 1965), 3381669 (Tschudi, 1968), 5192201 (Beben, 1993) and 5484272 (Horn, 1996), Chinese patent 88100255 (Zhu's root, 1992) and 91112754 (Zhu's root, 1997).These adopt the rotary engine patent of cam/roller or similar means still not solve the too high high frictional force that causes of bearing load and heavy wear thereby sealing that further causes and mechanical efficiency problem.

In addition, the rotary engine patent of these non-wankel forms does not all propose the solution sealing of a cover possible in theory, and cooling is lubricated, the method for bearing and combustion efficiency.

Improving engine thermal efficiency the best way is to increase expansion ratio under the prerequisite that does not reduce mechanical efficiency as much as possible, increasing compression ratio as much as possible under the condition that does not cause combustion knock.Increase the expansion specific energy and make the combustion gas acting more complete, thereby improve the thermal efficiency; Increasing compression ratio can reduce the thermal loss of combustion gas to casing wall, thereby improves the thermal efficiency.The engine cycles that can produce this effect is commonly referred to as miller cycle (Miller Cycle).In Reciprocating engine, adopted three kinds of methods to carry out miller cycle at present.First method is the shut-in time that changes intake valve by employing variable cam phase techniques, but this method is very limited; Second method is to select the switching time of best inlet and exhaust valve by the no camming of Electromagnetic Control inlet and exhaust valve; The third method be by change air cylinder structure and additional mechanical device change the volume (minimum cylinder volume) of firing chamber thus change compression ratio and expansion ratio.These methods have increased the complexity and the manufacture cost of engine structure widely, thereby are difficult to be used widely.

The content of invention

The purpose of this invention is to provide a kind of rotary engine, it is simple in structure, and specifically, total component number and moving element number significantly reduce, and the component manufacturing is simple, and assembling is easily with easy to maintenance;

Another object of the present invention provides a kind of rotary engine, and its unit weight and per unit volume output power are more even than height and output torque;

Another object of the present invention provides a kind of rotary engine, and its motor overall efficiency height is particularly kept the higher thermal efficiency and mechanical efficiency under low load-up condition;

Another object of the present invention provides a kind of rotary engine, and its discharging and noise are low, specifically, reduce discharging by burning more completely and expanding, and by reducing exhaust pressure, reduces the moving element number and reduces noise with the reduction bearing load;

Another object of the present invention provides a kind of rotary engine, and it is cheap, and by reducing total component number, moving element number and processed complex component number reduce cost;

Another object of the present invention provides a kind of rotary engine, and its reliability height is by reducing the moving element number and reducing bearing load and improve Mechanical Reliability.

What in order to achieve the above object, motor of the present invention adopted on Der Grundsatz der Maschinen is the scissors motion mode.Two rotors are arranged in this rotary engine, and each rotor has four sectors that stretch out.Reporting to the leadship after accomplishing a task mutually when two rotors puts together coaxially, and has formed eight cavitys or cylinder when putting an outer container on the rotor diameter.Have two suction ports on the outer container, two air outlets and two igniter plugs (for the petrol engine spark ignition engines).When rotating shaft was rotated, unidirectional rotation was done in two rotors and rotating shaft, but relatively rotated between two rotors, and the rear end rotor slowed down when the front end rotor quickened, and the rear end rotor quickened when the front end rotor slowed down.The rotor motion of this continuous repetition can make the cylinder volume constantly repeat from the big process from diminishing greatly again of little change, thereby forms the required suction action of engine cycles.This motor does not need valve mechanism just can finish the four stroke engine circulation.The moving circle of rotating shaft revolution, each cylinder will be finished two circulations, and motor is finished 16 circulations altogether.

The rotating speed of rotor is the stack of a rotating shaft rotating speed and an alternate rotating speed, and this alternate rotating speed is by the cam of a uniqueness/roller mechanism control.In the both sides of rotor/chair mechanisms a cam/roller mechanism is housed respectively.Cam/roller mechanism is by a bi-curved cam, two rocking arms, and four rollers and two central roller constitute.Rocking arm and central roller that roller is housed on the corner form a special linking mechanism.Two central roller link to each other with rotor, and the center of rocking arm is connected in the rotating shaft by drive link.When rotating shaft is rotated, drive the rocking arm center and rotate, on the curved surface of two rollers on the diagonal angle, roll at cam, two rollers on other diagonal angle roll on another curved surface of cam.This cause linking mechanism except that with the concentric rotation of rotating shaft its shape also do cyclically-varying, promptly the position and the speed of countershaft are done cyclically-varying to central roller mutually with rotor.Because the drive link that connects rear end linking mechanism and rotating shaft and the drive link that is connected front end linking mechanism and rotating shaft have 45 to misplace and the front end and back end cam is coordination in a circumferential direction at circumferencial direction, so the relative position of rear end rotor and rotating shaft and speed are always than 45 ° of the relative position of front end rotor and rotating shaft and velocity lags.This speed change that has just realized the phase countershaft that the front end and back end rotor is required is rotated.The curve form of cam profile has been determined the characteristics of motion of rotor and the Changing Pattern of cylinder location and volume.The curve form of certain cam profile can make two rotor inertia moments be delivered to the moment basic neutralisation that produces after the rotating shaft, and burning is to carry out simultaneously in two radially opposite firing chambers, thus motor rotate and combustion process in except the effective torque that countershaft is exported other power and moment all constitute approximate self balancing.

The sealing of firing chamber is divided into the sealing of rotor center, the sealing of the sealing of the rotor blade of separating adjacent cylinder and rotor bi-side.The conical seal ring of two sealings has been adopted in the sealing of rotor center, and the conical surface of each seal ring all contacts with a rotor and do not have with rotor and relatively rotates, and the plane of two seal rings contacts and relatively rotates.Three joint diaphragm seals have been adopted in the sealing of rotor blade.The closed circle by spring compression has been adopted in the sealing of side.The mode that engine cooling adopts is to use the water cooling outer container, with the lubricant oil cooled rotor of continuous-flow.Cam/roller mechanism and limit case-rotor interface all have oil lubrication.Lubricant oil flows to rotor blade from the limit case through the side, flows to the rotating shaft endoporus through the rotor internal diameter again.Lubricant oil flows to that the kinetic energy with rotor rotation converts pressure to behind the rotating shaft endoporus, and lubricant oil is compressed into the moving surface of contact of rocking arm and cam/roller mechanism by drive link then.

In order to improve engine thermal efficiency, on outer container, realize miller cycle with a circular tracheae connection compression chamber and air-inlet cavity, and increase another air outlet on tracheae, each

air outlet

131a, 131b are equipped with one in the engine cycles process or the simple and easy valve of the two condition of opening or closing.Two valve-closings can provide 3 different compression ratios with the combination of opening, the state that all is in out when two valves, this moment compression ratio minimum (such as 8-10); When a valve-closing and another valve are opened, compression ratio (such as 11-13) placed in the middle; When two valves all are in the state of pass, this moment compression ratio the highest and identical (such as 14-18) with expansion ratio.

Description of drawings

Fig. 1 is the planimetric map of explanation rotor/chair mechanisms working principle

Fig. 2 has illustrated how cylinder in the rotor motion process finishes the planimetric map of an engine cycles

Fig. 3 a and 3b are the rotor stereograms of two different amount

Fig. 4 is the stereogram of outer container

Fig. 5 is the stereogram of limit case

Fig. 6 is the overall exploded view of rotor

Fig. 7 is the parts scheme of installation of rotor/chair mechanisms

Fig. 8 is the front elevation of cam

Fig. 9 is the stereogram of rocking arm

Figure 10 is the exploded view of cam/roller mechanism

Figure 11 is the exploded view of power-transmitting unit

Figure 12 has shown the exploded view of engine body

Figure 13 a is the overall axial sectional view of motor, and Figure 13 b and 13c are the partial enlarged drawings of side seal and central seal.

Figure 14 is a kind of cam profile that is applied in this motor

Figure 15 is the curve that the relative spindle speed of the speed of front end and back end rotor changes with rotating shaft position

Figure 16 is the curve that changes with rotating shaft position at the cylinder volume of two different geometrical compression ratio

Figure 17 is the sectional view of rotor center seal ring

Figure 18 is the sectional view of rotor side surface seal ring

Figure 19 a is the state when realizing the valve-closing of miller cycle, and Figure 19 b is the state when realizing that miller cycle and valve are opened

Figure 20 a has shown the state a when valve-closing and another valve are opened, Figure 20 b has shown two states that valve all is in out realizing miller cycle, and Figure 20 c has shown that two valves all are in the state of pass.

Embodiment

Fig. 1 is the planimetric map of explanation rotor/chair mechanisms 90 working principles.Two identical rotors are arranged in rotor/chair mechanisms 90.Front end rotor 50a has blade 4a, 4b, 4c, 4d, and rear end rotor 50b has blade 59a, 59b, 59c, 59d.When front end and

back end rotor

50a, 50b report to the leadship after accomplishing a task mutually and be co-axially mounted on (see figure 7) when forming a rotor-support-foundation system 107 together, rotor blade 4a, 4b, 4c, 4d, 59a, 59b, 59c, 59d and 53 of outer containers form 8 cylinder 60a, 60b, 60c, 60d, 60e, 60f, 60g, 60h.Suction port 27a, 27b are arranged on the outer container 53, and

air outlet

28a, 28b also are equipped with two igniter plug 51a, 51b (for spark ignition engines).When rotating shaft 83 was rotated, unidirectional rotation was done in front end and

back end rotor

50a, 50b and rotating shaft 83, but relatively rotates between front end and back end rotor 50a, 50b.This can make the cylinder volume constantly repeat this variation greatly again from diminishing greatly from little change, thereby forms the required suction action of engine cycles.

Fig. 2 has illustrated wherein how two cylinder 60a, 60e of radial symmetric finish an engine cycles in front end and

back end rotor

50a, 50b movement process.When front end and

back end rotor

50a, 50b in the position when (a), cylinder 60a, 60e have just begun air inlet.Subsequently, front end rotor 50a slows down and rear end rotor 50b quickens, and causes the volume of cylinder 60a, 60e big from little change, so the further air inlet of cylinder 60a, 60e, and when (b), cylinder 60a, 60e intake process are near finishing in the position.Then, front end rotor 50a quickens and rear end rotor 50b slows down, and the volume that causes cylinder 60a, 60e is from diminishing greatly, and cylinder 60a, 60e left suction port 27a, 27b, so cylinder 60a, 60e begin compression.When (c), cylinder 60a, 60e have begun compression in the position; When (d), compression process is near finishing in the position.Igniter plug began igniting when compression process was finished, and simultaneously front end rotor 50a reduces speed now and rear end rotor 50b begins to quicken, and cause the volume of cylinder 60a, 60e big from little change again, so burning/inflation process of cylinder 60a, 60e begins.When (e), cylinder 60a, 60e just take fire/expand in the position; When (f), inflation process is near finishing in the position.At last, front end rotor 50a quickens once more and rear end rotor 50b slows down once more, and the volume that causes cylinder 60a, 60e is from diminishing greatly, and cylinder 60a, 60e communicate with relief opening 28a, 28b respectively, so cylinder 60a, 60e begin exhaust.When (g), cylinder 60a has begun exhaust in the position; When (h), exhaust process is near finishing in the position.Arrive this, a complete engine cycles is finished.When rotating shaft 83 is further rotated, cylinder 60a, 60e will enter next engine cycles.Rotating shaft 83 revolutions move a week, and each cylinder will be finished two complete engine cycles, thereby 8 cylinder 60a, 60b, 60c, 60d, 60e, 60f, 60g, the 60h of motor can finish 16 circulations.This has determined this motor to have high output power ratio.Because intake process, compression process, burning/inflation process and exhaust process are to carry out simultaneously in two radially opposite cylinder 60a and 60e, 60b and 60f, 60c and 60g, 60d and 60h, thus motor in the course of the work except effective output torque that combustion gas countershaft 83 produces other power and moment all constitute approximate self balancing.The reliability that this has caused very low bearing load thereby has improved motor greatly.

The geometrical shape of front end and

back end rotor

50a, 50b is identical.Fig. 3 a and 3b have shown the rotor stereogram of two different amount.Front end rotor 50a comprises an impeller 1, one side of impeller 1 is connected with an end face plectane 3, four are positioned on the impeller outer diameter and along the circumferential direction equally distributed sector 4a, 4b, 4c, 4d, the sidepiece of end face plectane 3 connect an annulus 5 and two from the annulus end face to the cylindrical bar 6a, the 6b that stretch out with blade 4a, 4b, 4c, 4d different direction, these key elements both can realize by parts, shown in Fig. 3 a and 3b, also can combine (not showing) by a plurality of parts.Impeller 1 has an endoporus 2 concentric with rotating shaft 83, and the cone tank of using for mounting center seal ring 45a 11 is arranged on the front-end face.There is cavity 7a, 7b, 7c, 7d, 7e, 7f, 7g, the 7h that constitutes the firing chamber bi-side of blade 4a, 4b, 4c, 4d.Blade 4a, 4b, 4c, 4d length are times of impeller 1 length, groove 8a, the 8b, 8c, the 8d that use for installation external sealed bar 42a, 42b, 42c, 42d are arranged on the external diameter of blade 4a, 4b, 4c, 4d, groove 10a, the 10b, 10c, the 10d that use for Stamping Steel Ribbon 43a, 43b, 43c, 43d in installing are arranged on the internal diameter, groove 9a, the 9b, 9c, the 9d that use for installation limit Stamping Steel Ribbon 44a, 44b, 44c, 44d are arranged on the external part, groove 13a, the 13b, 13c, the 13d that use for installation cold oil dividing plate 49a, 49b, 49c, 49d are arranged on the ear end face.And there are radial hole 14a, 14b, 14c, 14d to flow out in groove 13a, 13b, 13c, the 13d, flow into the endoporus 81 of rotating shaft 83 then for cold oil.The outer peripheral surface 12 of end face plectane 3 is side seal faces of firing chamber, is sealed by side seal ring 56a, 56b.Have aperture 15a, 15b on the internal diameter of annulus 5 and flow into cylindrical bar 6a, 6b, flow out from small sircle hole 16a, 16b then with fuel feeding.The main effect of cylindrical bar 6a, 6b is the knob torque of transmitting between

rotor

50a, 50b and cam/roller mechanism 92a, the 92b.In order to increase the wearability between central roller 46a, 46b and cylindrical bar 6a, 6b, wear ring 48a, 48b tightly are enclosed within the last internal surface with central roller 46a, 46b of cylindrical bar 6a, 6b and form sliding contact surface.Lubricant oil flows on the surface of contact from small sircle hole 16a, 16b.For the knob that increases cylindrical bar 6a, 6b changes rigidity, load onto an end plate 47 at the free end of cylindrical bar 6a, 6b.These can both be as can be seen from Figure 6.

Fig. 4 has shown the stereogram of outer container 53.The basic structure of outer container 53 is annular shell.Its internal surface 18 is corresponding with the outer surface of rotor blade 4a, 4b, 4c, 4d, 59a, 59b, 59c, 59d, can adopt the refractory metal plated film, or puts a cylinder liner (not showing).Housing directly upwards has suction port 27a, the 27b that two footpaths make progress opposite, two

air outlet

28a, 28b that the footpath makes progress opposite, two footpaths opposite hole 19a, 19b (for spark ignition engines) that uses for the dress igniter plug that make progress also has for suction port 20a, the 20b and air outlet 21a, the 21b that realize that miller cycle is used.Have cooling liquid hole 22a, 22b, 22c, 22d, oilhole 23a, 23b, 23c, 23d, four bolt hole 25a, 25b, 25c, 25d and front end and back end positioning hole 29a, 29b axially.Have round breach 26a, 26b on the internal diameter of bi-side, install for side seal ring 56a, 56b, this can find out from Fig. 7 and Figure 13 b.Respectively there are case 54a, 54b (see figure 7) on one side in the two ends of outer container 53.The geometrical shape of limit, front end and back end case 54a, 54b is identical with function.

As shown in Figure 5, the basic structure of limit case 54a also is an annular shell.Except housing shaft upwards has cooling liquid hole 36a, 36b, 36c, the 36d similar to outer container 53, oilhole 40a, 40b, 40c, 40d, outside four bolt hole 37a, 37b, 37c, 37d and the positioning hole 39, have two oilhole 38a, 38b directly over the housing, under have two oilhole 38c, 38d.Have radial hole 34a, 34b in oilhole 38a, the 38b and flow out from axial bore 35a, 35b, flow into cooled rotor blade 4a, 4b, 4c, 4d in blade oil groove 13a, 13b, 13c, the 13d then with fuel feeding.In order to guarantee oily continuous-flow, have annular groove 33 along hole 35a, 35b.Have another annular groove 31 on same one side of annular groove 33, install for

spring

58a, 58b, 58c, 58d and pressure ring 57, this can find out from Fig. 7 and Figure 13 b.Side 30 towards

rotor

50a, 50b is axial axis bearing surfaces, and any front end and

back end rotor

50a, 50b of forcing divides the axial force of opening to be born by the axial axis bearing surface 30 of limit, front end and back end case 54a, 54b.On the boss of annulus outer end bolt hole 41a, 41b, 41c, 41d are arranged, by

bolt

52a, 52b, 52c, 52d limit, front end and back end case 54a, 54b are fixed on the outer container 53, this also can be as seen from Figure 7.

Each cam/roller mechanism 92a, 92b by a uniqueness of the rotating speed of front end and

back end rotor

50a, 50b controls.The structure of this two cams/roller mechanism 92a, 92b is identical and be positioned at the both sides, front and back (seeing Figure 12) of rotor/chair mechanisms 90.Figure 10 has shown the formation of cam/roller mechanism 92a, and it comprises a cam 73a, two identical rocking arm 74a, 74b, four roller 75a, 75b, 75c, 75d and two central roller 46a, 46b.

Fig. 8 is the front elevation of cam 73a, and its internal surface has two four salient angle smooth surfaces that separated by annular groove 65: the first surface 63 and second curved surface 64.Housing shaft upwards has cooling

liquid hole

66a, 66b, 66c, the 66d similar to limit case 84a,

oilhole

67a, 67b, 67c, 67d, four bolt hole 61a, 61b, 61c, 61d and positioning holes 62 are to be fixed to casing 53 to cam 73a, 54a, on the 54b, directly over the housing and under respectively have an oilhole 68a, 68b.Have a radial groove 93 under in the annular groove 65 and communicate with oilhole 68b, the below in the annular groove 65 has two circular hole 94a, 94b and communicates with

oilhole

67c, 67d respectively.Fig. 9 has shown the stereogram of rocking arm 74a.Rolling surface of contact 70a, 70b are arranged, sliding contact surface 69 and roller bearing hole 72a, 72b on the rocking arm 74a.In addition, between surface of contact 69 and circular hole 72a, 72b, have oilhole 71a, 71b, further flow into the surface of contact that lubricates in roller bearing 76a, the 76b between roller 75a, 75b and roller bearing 76a, 76b for the lubricant oil that flows out from rotating shaft 83.

As shown in figure 10, preceding end cam/roller mechanism 92a comprises a cam 73a, two rocking arm 74a, 74b that identical subtend is provided with, the place, angle of each rocking arm is provided with two roller 75a, 75b, 75c, 75d respectively, two central roller 46a, 46b are arranged between two rocking arms; rocking arm 74a, form a linking mechanism 77a between 74b and central roller 46a, the 46b.The endoporus of central roller 46a, 46b inserts to connect front end rotor 50a and preceding end cam/roller mechanism 92a for the cylindrical bar 6a, the 6b that tightly are with wear ring 48a, 48b, central roller 46a, 46b among end cam after cylindrical bar 6a, 6b among the rotor 50b of rear end inserts/roller mechanism 92b is to connect rear end rotor 50b and back end cam/roller mechanism 92b, front end in rotating shaft 83 has circular hole to insert for front end drive link 84a, 84b, 85a, has circular hole to insert for rear

end drive link

84c, 84d, 85b in the rear end of rotating shaft 83; The two ends of front end drive link are by slide block 86a, the surface of contact 69 of rocking arm 74a, 74b is interior to connect rotating shaft 83 and preceding end cam/roller mechanism 92a among end cam before 86b inserts/roller mechanism 92a, the two ends of rear end drive link are by slide block 86c, and the surface of contact 69 of rocking arm 74a, 74b is interior to connect rotating shaft 83 and back end cam/roller mechanism 92b among 86d insertion back end cam/roller mechanism 92b.

Referring to Fig. 9,10, on two roller 75a, 75c the first surface 63 on the diagonal angle, do the contact of rolling at cam 73a, two roller 75b, 75d on another diagonal angle do the contact of rolling on second curved surface 64 of cam 73a.That is the rolling of first surface 63 guiding first couple of roller 75a, 75c in the rotation process of front end rotor 50a in the preceding end cam 73a, the rolling of 64 guiding of second curved surface second couple of roller 75b, 75d.Between central roller 46a, the 46b of surface of contact 70a, the 70b of rocking arm 74a, 74b and connection front end rotor 50a relative rolling is arranged.Between the surface of contact 69 of rocking arm 74a, 74b and the half-cylindrical slide blocks 86a, the 86b that are connected drive link 84a, 84b, 85a and rotating shaft 83 slide relative is arranged.Figure 11 has shown

slide blocks

86a, 86b, 86c, 86d, the power-transmitting unit 91 that drive

link

84a, 84b, 84c, 84d, 85a, 85b and rotating shaft 83 constitute.Near having two oil groove 78a, 78b in the middle of the rotating shaft 83, circular hole 14a, 14b, 14c, the 14d of

rear end rotor

50a, 50b flow into rotating shaft endoporus 81 in the past with fuel feeding.The front end of rotating shaft 83 has an oil groove 79a, with the pressurized oil duct of fuel feeding from rotating shaft endoporus 81 inflow engine head end boxes 112 (seeing Figure 12); The rear end has an oil groove 79b, flows into the pressurized oil duct of rear cabinet 117 from rotating shaft endoporus 81 with fuel feeding; The middle has a small sircle hole 82, thereby flows into sealing surface between gap lubricated two central seal ring 45a, 45b between front end and back end rotor 50a, the 50b with fuel feeding from rotating shaft endoporus 81.The two ends of rotating shaft endoporus 81 clog with circle plug 87a, 87b.Having circular hole in the rotating shaft 83 packs into for drive link 85a, the 85b of

solid drive link

84a, 84b, 84c, 84d and band oilhole.Lubricant oil flows into slide blocks 86a, the 86b that has oil groove 80 from drive link 85a, the 85b of band oilhole, 86c, and 86d flows among rocking arm 74a, the 74b then.When rotating shaft 83 is rotated, cause that the shape of linking mechanism 77a constantly changes.More particularly, the rotating shaft 83 that links to each other with drive link 84a, 84b, 85a is whenever circled, and the front end rotor 50a that links to each other with central roller 46a, the 46b position and the speed of countershaft 83 mutually will do 4 cycles variations.Meanwhile, form a similar linking mechanism 77b in back end cam/roller mechanism 92b.The motion of rear end linking mechanism 77b is identical with front end with the rolling of rear end roller on two curved surfaces, still, and 45 ° of the relative front end rotor 50b of relative position of rear end rotor 50b and rotating shaft 83 and the relative position of rotating shaft 83 and velocity lags with speed.That is to say that when front end rotor 50a phase countershaft 83 quickened, rear end rotor 50b phase countershaft 83 slowed down; When front end rotor 50a phase countershaft 83 slowed down, rear end rotor 50b phase countershaft 83 quickened.

Rotor/outer container mechanism 90, cam/roller mechanism 92a, 92b and power-transmitting unit 91 are three the most basic mechanical parts of this engine body, claim RCD system 17 again.Figure 12 has shown the exploded view of engine body.In Figure 12, rotor/chair mechanisms 90 fits together with power-transmitting unit 91.Allow

slide blocks

86a, 86b slip in the surface of contact 69 of two rocking arm 74a, 74b between two rocking arm 74a, the 74b simultaneously by allowing central roller 46a, 46b insert, front end and back end cam/roller mechanism 92a, 92b just can be installed to the both sides of rotor/outer container mechanism 90.Front end and back end cam 73a, 73b are fixed by locating stud 89a, 89b in the position of the relative casing 53 of circumferencial direction.On outer container, added a suction tude 130 connect up and down two suction port 27a and 27b be connected with a steam outlet pipe 127 about two

air outlet

28a, 28b.

As Figure 12, except RCD system 17, engine body also has front end and back end structure 128,129 to come entering of direct coolant and lubricant oil and flow out, and front end and back end oil sealing (not shown) comes sealing pivot 83 in case leakage of oil and front end and back end bearing (not shown) are born the radial load in the rotating shaft 83.Front end and back end cam 73a, 73b and limit, front end and back end case 54a, 54b reach and 128,129 on front end and back end structure is leveled up (not shown), and rear end flowline connection to subsea 116 is connected to front end flowline connection to subsea 111 by oil pipe 118.At last, adding stay bolt 119a, 119b, 119c, 119d and four nut 126a, 126b, 126c, 126d by four is fixed together front end and back end structure 128,129 and RCD system 17.Figure 13 a has shown the axial sectional view of the engine body that is installed together.

Below with regard to involved in the present invention to several importances be further elaborated. The RCD system

RCD system 17 comprises rotor/90, two cams of outer container mechanism/roller mechanism 92a, 92b and power-transmitting unit 91.They are three the most basic mechanical parts of this engine body.16 engine cycles of revolution are finished in rotor/outer container mechanism 90, the long-pending variation of rotor motion and cylinder block is to be controlled by cam/roller mechanism 92a, 92b, and combustion gas institute work is passed by power-transmitting unit 91 through cam/roller mechanism 92a, 92b.In whole engine mechanical movement process, the line at two rocking arm 74a, 74b center among the front end linking mechanism 77a, i.e. drive link 85a, the angle that forms with the line at two central roller 46a, 46b center has constituted an important parameter-rotor phase angle (τ).Rotor rotation angle (ψ) is rotor phase angle (τ) sum of rotating shaft rotational angle (θ) and alternate; Rotor speed is the stack of the rotor phase angular rate of change of rotating shaft rotating speed and alternate.Therefore rotor phase angle (τ) has determined the position and the speed of

rotor

50a, 50b phase countershaft 83.Maximum rotor phase angle has determined that also each cylinder can open maximum angle.Generally speaking, Zui Da rotor phase angle can be taken as 10-15 °.When rotating shaft 83 was rotated, rotor phase angle (τ) periodically departed from 90 °, thereby caused that the position and the speed of

rotor

50a, 50b phase countershaft 83 does cyclically-varying.And each cylinder is finished two engine cycles and is required rotor phase angle (τ) and spinner velocity to finish four cycles variations in one week in one changes.Because the relative front end drive link of rear end drive link 85b 85a has 45 dislocation and front end and back end cam 73a, 73b are coordination in a circumferential direction at circumferencial direction, therefore, the relative position of rear end rotor 50b and rotating shaft 83 and speed are always than 45 ° of the relative position of front end rotor 50b and rotating shaft 83 and velocity lags.This has just caused such result: when front end rotor 50a phase countershaft 83 quickened, rear end rotor 50b phase countershaft 83 slowed down; When front end rotor 50a phase countershaft 83 slowed down, rear end rotor 50b phase countershaft 83 quickened; When rotor phase angle (τ) equaled 90 °, the speed of front end and

back end rotor

50a, 50b all equaled spindle speed.The long-pending Changing Pattern of rotor motion rule and cylinder block is to influence engine power performance, the key factor of combustion efficiency and discharging.Keep symmetric relation (seeing Figure 14) as long as cam profile is the profile line of one the four salient angle smoothed curve (owing to requiring rotor to finish four periodic motions in one week) and second curved surface 64 and the profile line of first surface 63, the RCD system just can finish the motion that engine cycles requires.This simple requirement provides a large amount of selection spaces can for the design of motor.That is to say,, thereby can reach best rotor motion rule and the long-pending Changing Pattern of cylinder block and make motor obtain power performance preferably simultaneously, combustion efficiency and discharging by designing different cam profile curves according to different application requirements.

Figure 14 has shown a kind of typical cam profile: the first curve 120a and the second curve 120b.Figure 14 has also shown the equidistant axle 122a of two of profile line, the circle 121 that 122b and equidistant axle position A, B, C, D constitute.Article two, form an angle of 90 degrees degree between equidistant axle 122a, the 122b.The first curve 120a and the second curve 120b form symmetric relation about arbitrary equidistant axle 122a, 122b.Figure 15 has shown velocity curve 123a, the 123b of front end and

back end rotor

50a, 50b phase countershaft 83.Figure 16 is the curve 124,125 of cylinder volume with rotating shaft 83 change in location.Curve 124 represented geometrical compression ratio be 10 and maximum cylinder volume be 1 cylinder volume curve, curve 125 represented geometrical compression ratio be 15 and maximum cylinder volume be 1 cylinder volume curve. The sealing of firing chamber

The gap that forms between blade 4a, the 4b of front end and

back end rotor

50a, 50b, 4c, 4d, 59a, 59b, 59c, 59d outer surface and outer container 53 internal surfaces is sealed by external sealed bar 42a, 42b, 42c, 42d; Between impeller 1 outer surface of blade 4a, the 4b of front end rotor 50a, 4c, 4d internal surface and rear end rotor 50b and the gap that forms between impeller 1 outer surface of blade 59a, 59b, 59c, 59d internal surface and the front end rotor 50a of rear end rotor 50b is sealed by interior Stamping Steel Ribbon 43a, 43b, 43c, 43d; Between the end face plectane 3 of blade 4a, the 4b of front end rotor 50a, 4c, 4d external part and rear end rotor 50b and the gap that forms between the end face plectane 3 of blade 59a, 59b, 59c, 59d external part and the front end rotor 50a of rear end rotor 50b is sealed by limit Stamping Steel Ribbon 44a, 44b, 44c, 44d.For high output engine, each blade 4a, 4b, 4c, 4d, 59a, 59b, 59c, 59d may need two groups even three groups of Stamping Steel Ribbons (not showing), just can reach sealing effect.The gap that forms between the impeller 1 of front end and

back end rotor

50a, 50b is sealed by two central seal ring 45a, 45b.Figure 13 c has shown the partial enlarged drawing of central seal, and Figure 17 is the sectional view of central seal ring 45a.Central seal ring 45a have one with 99, one of the sealing surfaces of the mutually quiet contact of rotor 11 internal conical surfaces and rear end central seal ring 45b sealing surface 100 and two grooves 101,102 that increase the seal ring flexibilities of moving contact mutually.Groove 101 can also play the effect that reduces gas leakage.The gap that forms between end face plectane 3 outer surfaces of front end and

back end rotor

50a, 50b and outer container 53 internal surfaces is sealed by front end and back end side seal ring 56a, 56b.Figure 13 b has shown the partial enlarged drawing of forward end face seal, and Figure 18 is the sectional view of side seal ring 56a.Side seal ring 56a has a sealing surface 104 with outer container 53 mutually quiet contacts, moving mutually 105, one of the sealing surface that contact of end face plectane 3 outer surfaces with rotor 50a is stressed and encircles the 57 roundlet conical surfaces 103 that act on and the flexible groove 106 that leaks gas with reduction of increase seal ring. Engine cooling is with lubricated

As shown in figure 12, after cooling liquid enters from liquid inlet pipe joint 110, axial flow is crossed motor head case 112, preceding end cam 73a, front-end edge case 54a, outer container 53, back end edge case 54b, two axial cooling passages that cooling liquid hole in back end cam 73b and the motor rear end case 117 forms enter motor rear end case 117; Then, cross motor rear end case 117, back end cam 73b, back end edge case 54b, outer container 53, front-end edge case 54a, two the axial cooling passages in addition in preceding end cam 73a and the motor head case 112, return engine head end box 112 from the opposite side axial flow; At last, flow out from the liquid outlet joint (not shown).Because axially cooling passage directly passes through outer container 53 housings of igniter plug both sides, so cooling liquid has been cooled off the hottest zone of outer container 53 housings preferably.

After oil enters from inlet connector 109, divide two path inflow engines.Article one, path oil enters oilhole 38a, the 38b of front-end edge case 54a through the axial passage of oilhole formation directly over motor head case 112 and the preceding end cam 73a; Then, oil is through radial hole 34a, 34b in the front-end edge case 54a, and axial bore 35a, 35b and annular groove 33 flow into blade oil groove 13a, 13b, 13c, 13d interior cooled blade 4a, 4b, 4c, the 4d of front end rotor 50a; Then, oil flows out blade 4a, 4b, 4c, 4d through radial hole 14a, the 14b of front end rotor 50a, the endoporus 81 that 14c, 14d flow into rotating shaft 83.The second path is an oil process motor head case 112, preceding end cam 73a, and front-end edge case 54a, outer container 53, back end edge case 54b, the axial passage that other two the top oilholes in back end cam 73b and the motor rear end case 117 form enters motor rear end case 117; Then, oil returns back end edge case 54b from motor rear end case 117 through the axial passage that oilhole directly over motor rear end case 117 and the back end cam 73b forms; Then, similar to article one path, oil enters rear end rotor 50b cooled blade 59a, 59b, 59c, 59d, flows into the endoporus 81 of rotating shaft 83 again.After oil entered rotating shaft endoporus 81 from front end and

back end rotor

50a, 50b, the kinetic energy of oil was converted into oil pressure.A critical function of the pressurised oil in the rotating shaft endoporus 81 is the moving surface of contact in lubricated front end and back end cam/roller mechanism 92a, 92b.In preceding end cam/roller mechanism 92a, oil flow into two rocking arm 74a, the 74b from drive link 85a and slide blocks 86a, the 86b of band oilhole; Then, further flow in roller bearing 76a, 76b, 76c, the 76d with the moving surface of contact between lubricated roller 75a, 75b, 75c, 75d and roller bearing 76a, 76b, 76c, 76d through oilhole 71a, 71b in rocking arm 74a, the 74b; Wear ring 48a, the 48b and the surface of contact between central roller 46a, 46b that tightly are enclosed within on rotor cylindrical bar 6a, the 6b are to be lubricated by the oil that flows out in rotor cylindrical bar 6a, 6b; Pressurised oil below cam 73a in oilhole 67c, the 67d is ejected on the linking mechanism 77a to increase lubricating between roller and cam curved surface from aperture 94a, 94b.After oil flows out from surface of contact, flow to the axial passage that forms by oilhole under motor head case 112 and the preceding end cam 73a through the groove 93 in the preceding end cam 73a; Then, oil flows out from the flowline connection to subsea 111 that is contained on the motor head case 112.The path of the path of oil oil in preceding end cam/roller mechanism 92a in back end cam/roller mechanism 92b, when oil from after moving surface of contact in end cam/roller mechanism 92b flow out the back and flow to oil pipe 118 by the flowline connection to subsea 116 that is contained on the motor rear end case 117, could flow out from the flowline connection to subsea 111 of front end then.In addition, pressurised oil in the rotating shaft endoporus 81 is by the radial hole in the motor front end and back end case 112,117 and by motor head case 112, preceding end cam 73a, front-end edge case 54a, outer container 53, back end edge case 54b, the axial passage of two below oilhole formation in addition in back end cam 73b and the motor rear end case 117 communicates.When the oil pressure in these two axial passages and the rotating shaft endoporus 81 is too high, be contained in the pressurised oil valve 115 that head end box covers and open, reduce oil pressure thereby allow pressurised oil flow out. Miller cycle and variable compression ratio

Motor of the present invention is owing to its unique working principle, the thermal efficiency that is easy to realize miller cycle thereby can improves motor.The 32a of miller cycle mechanism, the 32b that are installed on the outer container in Fig. 7, have been shown.Figure 19 a and 19b are an explanation realizes miller cycle on this motor floor map.Generally speaking, on such rotary engine, the 32a of miller cycle mechanism, 32b only need a

tracheae

95a, 95b (referring to U. S. Patent 5622149).To such an extent as to

tracheae

95a, 95b are used for connecting

compression chamber

97a, 97b and air-inlet cavity 98a, the interior part gas of

98b compression chamber

97a, 97b can return in air-inlet cavity 98a, the 98b, but can not cause the gas in air-inlet cavity 98a, the 98b to flow backwards.This is similar in appearance to the shut-in time of retarded admission door in Reciprocating engine, thus the actual compression ratio of reduction.If the design geometrical compression ratio (such as 14-15) than common Otto cycle desired compression than (such as 8-10) height, expansion ratio just can reach optimal scope (such as 14-18) so, and actual compression ratio can be reduced to the scope (such as 8-10) that prevents that combustion knock from occurring by allowing a part of gas return in air-inlet cavity 98a, the 98b.In addition, the gas after high expansion ratio can cause burning has lower temperature, thereby reduces nitric oxide production formation; The gas that the while high expansion ratio can cause discharging has lower pressure, thereby reduces exhaust noise.Because motor is under different operating conditionss, the compression ratio that does not cause combustion knock is different, therefore also requires to change compression ratio in the power operation process.There are two kinds of methods can be implemented in actual compression variable ratio in the power operation process.First method is to add one by pressure controlled

valve

96a, 96b in tracheae, guarantees that the pressure maximum in compression chamber 97a, the 97b maintains the maximum pressure (referring to U. S. Patent 5622149) that does not cause combustion knock under the operating conditions by the opening time of regulating tracheae.Figure 19 a and Figure 19 b have shown the state when

valve

96a, 96b close and open respectively.The shortcoming of this method is that motor response of

valve

96a, 96b under the condition of running up is difficult to catch up with, and is for this rotary engine with 8 cylinders, difficult especially.Second method is to increase another tracheae and another air outlet (not showing) or increase another

air outlet

131a, 131b (seeing Figure 20) on each tracheae.Each

air outlet

20a, 131a, 20b, 131b are equipped with one in the engine cycles process or the simple and easy valve 96a of the two condition of opening or closing, 132a, 96b, 132b, and valve can be controlled by magnet or small motor.If increase another tracheae and another air outlet, two valve-closings can provide 4 different compression ratios with the combination of opening; If increase another air outlet on each tracheae, two valve-closings can provide 3 different compression ratios with the combination of opening.3-4 different compression ratio can satisfy the requirement of different operating conditions basically.Figure 20 b has shown two states that

valve

96a, 132a, 96b, 132b are in out, at this moment compression ratio minimum (such as 8-10); Figure 20 a has shown that valve 96a, a 96b close and another valve 132a, state when 132b opens, compression ratio this moment (such as 11-13) placed in the middle; Figure 20 c has shown that two

valve

96a, 132a, 96b, 132b are in the state of pass, this moment compression ratio the highest and identical (such as 14-18) with expansion ratio.Second method realizes easily and can be applicable to the high engine speeds operating condition, therefore is the present invention's implementation miller cycle that proposes and method that changes actual compression ratio.Because motor is under different operating conditions, it is best that compression ratio and expansion ratio can both reach, and therefore can both keep high efficiency under different operating conditions, and this will significantly improve fuel economy and discharging.

Claims

1. the rotary engine of a self balancing, comprise an outer container (53), rotating shaft (83), front end rotor (50a) has blade (4a, 4b, 4c, 4d), rear end rotor (50b) has blade (59a, 59b, 59c, 59d), before, the structure of rear end rotor is identical, front end and back end rotor (50a, 50b) report to the leadship after accomplishing a task mutually and be co-axially mounted on rotating shaft (83) and go up form a rotor-support-foundation system (107), rotor blade (4a, 4b, 4c, 4d, 59a, 59b, 59c, form 8 cylinder (60a 59d) and between outer container (53), 60b, 60c, 60d, 60e, 60f, 60g, 60h), before, rear end rotor (50a, 50b) connect respectively before, back end cam/roller mechanism (92a, 92b), it is characterized in that: front end rotor (50a) comprises an impeller (1), one side of impeller (1) is connected with an end face plectane (3), four are positioned on the impeller outer diameter and along the circumferential direction equally distributed sector (4a, 4b, 4c, 4d), the sidepiece of end face plectane (3) connect an annulus (5) and two from the annulus end face to blade (4a, 4b, 4c, 4d) cylindrical bar (the 6a that stretches out of different direction, 6b); Outer container is provided with two suction port (27a, 27b), two air outlet (28a, 28b), two igniter plug (51a, 51b) (for spark ignition engines), suction port the radial symmetric setting respectively of air outlet and igniter plug, preceding end cam/roller mechanism (92a) comprises a cam (73a), two rocking arm (74a that identical subtend is provided with, 74b), the place, angle of each rocking arm is provided with two roller (75a respectively, 75b, 75c, 75d), two central roller (46a, 46b) be arranged between two rocking arms, central roller (46a, endoporus 46b) is for cylindrical bar (6a, 6b) insert to connect front end rotor (50a) and preceding end cam/roller mechanism (92a), cylindrical bar (6a in the rear end rotor (50b), 6b) central roller (the 46a in insertion back end cam/roller mechanism (92b), endoporus 46b) is to connect rear end rotor (50b) and back end cam/roller mechanism (92b), front end in rotating shaft (83) has circular hole for front end drive link (84a, 84b, 85a) insert, circular hole is arranged in the rear end of rotating shaft (83) for rear end drive link (84c, 84d, 85b) insert; The two ends of front end drive link are by slide block (86a, 86b) insert rocking arm (74a in preceding end cam/roller mechanism (92a), surface of contact 74b) (69) is interior to connect rotating shaft (83) and preceding end cam/roller mechanism (92a), the two ends of rear end drive link are by slide block (86c, 86d) insert rocking arm (74a in back end cam/roller mechanism (92b), surface of contact 74b) (69) is interior to connect rotating shaft (83) and back end cam/roller mechanism (92b), rear end drive link (84a, 84b, 85a) relative front end drive link (84c, 84d, 85b) the 45 dislocation is arranged at circumferencial direction.

2. the rotary engine of self balancing according to claim 1 is characterized in that: cone tank (11) is arranged for mounting center seal ring (45a) on the front-end face of described impeller.

3. the rotary engine of self balancing according to claim 1 is characterized in that: wear ring is housed between cylindrical bar (6a, 6b) and central roller (46a, 46b), and (48a 48b), is equipped with an end plate (47) at the free end of cylindrical bar (6a, 6b).

4. the rotary engine of any one described self balancing according to claim 3, it is characterized in that: blade (4a, 4b, 4c, groove (8a is arranged on external diameter 4d), 8b, 8c, 8d) for external sealed bar (42a is installed, 42b, 42c, 42d), groove (10a is arranged on the internal diameter, 10b, 10c, 10d) for Stamping Steel Ribbon (43a in installing, 43b, 43c, 43d), groove (9a is arranged on the external part, 9b, 9c, 9d) for limit Stamping Steel Ribbon (44a is installed, 44b, 44c, 44d), groove (13a is arranged on the ear end face, 13b, 13c, 13d) for cold oil dividing plate (49a is installed, 49b, 49c, 49d) but blade (4a of oil cooling, 4b, 4c, 4d, 59a, 59b, 59c, 59d), groove (13a, 13b, 13c, radial hole (14a is arranged 13d), 14b, 14c, 14d) flow out rotor with the guiding cold oil.

5. the rotary engine of self balancing according to claim 1, it is characterized in that: the centre near rotating shaft (83) has two oilhole (78a, 78b) enter rotating shaft for the oil that flows out from rotor, the kinetic energy of oil changes oil pressure into, the front and back ends of rotating shaft (83) has oil groove, and (79a 79b) is connected to poor the communicating of oil of pressure oil valve (115), when oil pressure is too high for the pressurised oil in the rotating shaft and, the pressure oil valve open reduces oil pressure thereby allow pressurised oil flow out.

6. the rotary engine of self balancing according to claim 1, it is characterized in that: have drive link (85a, the 85b) insertion of circular hole in the rotating shaft (83) for the band oilhole, make lubricant oil flow into slide blocks (86a, the 86b that has oil groove (80) from rotating shaft, 86c, 86d), and then flow in the rocking arm (74a, 74b), pass through the gap that the interior oilhole (71a, 71b) of rocking arm (74a, 74b) flows into roller (75a, 75b, 75c, 75d) and roller bearing (76a, 76b, 76c, 76d) then.

7. the rotary engine of self balancing according to claim 1, it is characterized in that: described outer container is provided with suction port (20a, 20b) and air outlet (21a, the 21b) that realizes that miller cycle is used, described suction port (20a, 20b) uses tracheae (95a, 95b) to be connected respectively with air outlet (21a, 21b), and each air outlet (21a, 21b) all is equipped with one in the engine cycles process or the simple and easy valve of the two condition of opening or closing (96a, 96b).

8. the rotary engine of self balancing according to claim 1, it is characterized in that: outer container axially on have cooling liquid hole (22a, 22b, 22c, 22d) with the hottest zone of cooling outer box shell, oilhole (23a, 23b, 23c, 23d), at least four bolts hole (25a, 25b, 25c, 25d) and front end and back end positioning hole (29a, 29b) have round breach (26a, 26b) for installation side face seal ring (56a, 56b) on the internal diameter of bi-side.

9. the rotary engine of self balancing according to claim 1, it is characterized in that: respectively there is case (54a, 54b) on one side at the two ends of outer container (53), by bolt (52a, 52b, 52c, 52d) limit, front end and back end case (54a, 54b) is fixed on the outer container (53), so that the side towards rotor of limit case (30) become the axial axis bearing surface.

10. the rotary engine of self balancing according to claim 7, it is characterized in that: the basic structure of described limit case (54a) is an annular shell, housing shaft upwards has cooling liquid hole (36a, 36b, 36c, 36d), oilhole (40a, 40b, 40c, 40d), at least four bolt hole (37a, 37b, 37c, 37d) and a positioning hole (39), have two oilhole (38a directly over the housing, 38b), under have two oilhole (38c, 38d), oilhole (38a, have radial hole (34a 38b), 34b), along hole (35a, 35b) have annular groove (33), have another annular groove (31) on same one side of annular groove (33), for spring (58a, 58b, 58c, 58d) and pressure ring (57) install.

11. the rotary engine of self balancing according to claim 1, it is characterized in that: be front and back ends cam (73a, internal surface 73b) has two four salient angle smooth surfaces that separated by annular groove (65): first surface (63) and second curved surface (64), the profile line (120b) of the profile line of first surface (120a) and second curved surface forms symmetric relation about the arbitrary equidistant axle (122a, 122b) of profile line.

12. the rotary engine of self balancing according to claim 1, it is characterized in that: the rolling of first surface (63) the first pair of roller of guiding (75a, 75c) before in the rotation process of front end rotor (50a) in the end cam (73a), the rolling of second curved surface (64), second pair of roller of guiding (75b, 75d), the rolling of first surface (63) the first pair of roller of guiding (75a, 75c) in the rotation process of rear end rotor (50b) in the back end cam (73b), the rolling of second curved surface (64), second pair of roller of guiding (75b, 75d).

13. a rotary engine realizes the method for miller cycle and variable compression ratio, it is characterized in that: going up at tracheae (95a, 95b) increases another air outlet (131a, 131b), each air outlet (131a, 131b) all is equipped with one in the engine cycles process or the simple and easy valve of the two condition of opening or closing (132a, 132b), two valves (96a, 132a, 96b, 132b) are closed with the combination of opening can provide 3 different compression ratios, the state that all is in out when two valves (96a, 132a, 96b, 132b), this moment compression ratio minimum (such as 8-10); When a valve (96a, 96b) is closed and another valve (132a, 132b) when opening, compression ratio (such as 11-13) placed in the middle; When two valves (96a, 132a, 96b, 132b) all are in the state of pass, this moment compression ratio the highest and identical (such as 14-18) with expansion ratio.