JPS61200332A - Rotary engine - Google Patents

Abstract

PURPOSE:To secure improvements in mechanical efficiency and quiet driving, by constituting a rotary engine in a way of setting up both second and third rotors so as to cause each of base external lines to be circumscribed at two points on a diametral line o the rotor installing plural projecting seal parts on its circumference. CONSTITUTION:Three rotors 2A-2C, making a perfect circle their base external lines, are set up so as to cause these base external lines of both second and third rotors 2B and 2C to be circumscribed at two points on a diametral line of the first rotor 2A, and these rotors 2A-2C are housed inside a common casing 1. Plural pieces (for example, three pieces) of projecting seal parts 4 (4A-4C) are formed on the circumference of the first rotor 2A at regular angular intervals, and each of concave parts 5 and 6 capable of engaging and conforming to these seal parts are formed in these second and third rotors 2B and 2C, respectively. In addition, the concave part 6 is interconnected to the third rotor 2C, forming a combustion chamber 7, and a spark plug 18 is attached to the specified position adjoining this combustion chamber 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotary engine used as an internal combustion engine or a compressor.

(Prior art) Reciprocating engines (in which a piston moves reciprocatingly within a cylinder; the same applies hereinafter) have been used as internal combustion engines for many years, but in recent years, engines with higher output per unit weight and higher mechanical efficiency have been used. The so-called Wankel rotary engine (Wankel type rotary engine) has a rotor 2'', which is made up of a peritrochoid curve, and rotates inside a casing 1', which is made up of a peritrochoid curve, and has excellent features such as quietness, smoothness of rotation, etc. (see Figure 3) was invented and is currently being put into practical use as engines for automobiles, boats, etc.

(Problems to be Solved by the Invention) However, although the Wankel type rotary engine has the above-mentioned advantages over the reciprocating type, the rotor 2"
Since the revolution axis 011 (center axis of the output shaft 3') and the rotation axis 01' (center axis of the internal gear of the rotor 21) do not match (see Fig. 4), mechanical loss due to eccentricity and the accompanying Due to vibrations, it was not possible to achieve the completely smooth rotation of an electric motor, and it was not perfect as a rotary engine.

The present invention has been made in view of the above-mentioned current situation, and an object of the present invention is to provide a rotary engine that is superior to conventional rotary engines in terms of mechanical efficiency, quietness, smoothness of rotation, etc.

(Means for Solving the Problems) A rotary engine according to the present invention is a rotary engine in which a rotor rotates within a casing, in which first, second, and third rotors whose basic outlines are perfect circles are arranged in a first rotary engine. The base outlines of the second and third rotors are arranged so as to be circumscribed at two different locations on the rotor outline, protruding seal portions are formed at equal intervals on the outside of the base outline of the first rotor, and the base of the second rotor is A recess that substantially matches the protrusion seal portion is formed inside the outer outline of the third rotor, and four parts that match the protrusion seal portion and a combustion chamber communicating with the recess are formed inside the base outline of the third rotor, and the combustion chamber is arranged as described above. The rotor chamber of the casing in which the three rotors are housed is formed so as to match the rotational outline locus of each rotor, and the rotor chamber of the rotor chamber portion of the casing in which the first rotor is housed, and the first rotor , 1st
An annular space portion divided into two formed by the contact portion between the rotor and the second rotor and the contact portion between the first rotor and the third rotor (each of the two divided spaces is referred to as a first space and a second space. This specification (same in this document), an inlet is formed in a part that performs an intake action as each rotor rotates, and an exhaust port is formed in a part that performs an exhaust action, and a rotating shaft that supports each rotor is connected to a first rotor. 2nd and 3rd for the rotation of
By connecting the rotors with gears so that they rotate in the opposite direction, the protruding seal portion of the first rotor rotates to fit into the recesses of the second and third rotors, and the rotor is rotated in the annular space divided into two parts. Inhalation, compression, explosion due to rotation,
It is characterized in that it is configured to perform each step of exhaustion.

(Function) Therefore, when the present rotary engine having the above configuration is used as an internal combustion engine, the protrusion seal portion of the first rotor (first protrusion seal portion) closes the intake port formed in the first space portion. By passing through the first space, the first
By inhaling the air-fuel mixture into the space formed by the contact part between the rotor and the second rotor and the first protrusion seal part, and the next protrusion seal part (second protrusion seal part) of the rotor passes through the intake port, As the second protrusion seal portion rotates,
Compression is performed at the contact portion between the second protruding seal portion, the first rotor, and the third rotor. Then, as the second protrusion seal portion rotates, when the second protrusion seal portion reaches the contact area between the first rotor and the third rotor, the compressed air-fuel mixture is transferred between the first rotor and the third rotor by the second protrusion seal portion. The air-fuel mixture is pushed into a combustion chamber formed by three rotors, and the air-fuel mixture ignites and explodes. The explosive force acts on the first or second protruding seal portion of the first rotor and the recessed portion containing the combustion chamber of the third rotor, thereby causing the first rotor and the third rotor to rotate in opposite directions. Next, the second protruding seal portion of the first rotor rotates toward the contact portion between the first rotor and the second rotor, and the combustion gas in the second space is discharged from the exhaust port. Each of the suction, compression, explosion, and exhaust processes of this rotary engine involves the successive actions described above, and in each of the above steps, this rotary engine:
The rotors rotate around the rotation axis of each rotor.

Furthermore, when this rotary engine is used as a compressor, the explosion/exhaust process described above is not performed, and when the compression process is completed, the compressed air is sent to a pressure tank or the like outside the engine.

(Example) Hereinafter, an example in which the present invention is used as an internal combustion engine will be described with reference to the drawings. FIG. 1 is a front sectional view showing the structure of a rotary engine according to the present invention, and FIG. 2 is a plan sectional view taken along the line X--X in FIG.

In the figure, ■ is the casing, R is the rotor chamber formed in the casing, 28 is the first rotor, 2B is the second rotor, 2C is the third rotor, 3 is the rotating shaft, and 4 is the first rotor. 5 is a recess formed in the second rotor, 6 is a four part formed in the third rotor, 7 is a combustion chamber formed integrally with the recess 6, and 8 is a connection between the rotors. A gear, 9 is an inlet port, 10 is an exhaust port, 20 is a communication port that prevents the four parts of the second rotor from becoming negative pressure, and S has a pointed tip and is protruded from the rotor circumferential surface with a spring. This is the inserted seal plate.

When the rotary engine according to the present invention is explained based on FIG. 1, the first, second, and
The third three rotors 2A, 2B, and 2C are connected to the base outlines of the second and third rotors at two different points on the basic outline line of the first rotor, in this example, two points on the diameter line of the first rotor. In other words, the rotation axis 3 (3a, 3b, 3
c) The centers of each base line C1 are located on a straight line.
, C2, and C3 (indicated by dashed lines in FIG. 1) are arranged so as to be circumscribed. There are a plurality of protruding seal parts 4 at equal intervals on the outside of the basic outline of the first rotor 2A, three in this embodiment (first protruding seal part 4a, second protruding seal part 4b, third protruding seal part). formed and the second
The rotor has the above-mentioned protrusion seal portion 4 on the inside of its basic outline.
Four parts, more precisely, a recessed part 5 of a shape that prevents the protruding seal part from interfering with the second rotor when the first rotor rotates, are formed in the third rotor, and the third rotor has a concave part 5 which is formed on the inside of its basic outline. A four part 6 that matches the protruding seal part 4 and a combustion chamber 7 are formed in communication with the four part 6. The shape of the protruding seal portion is such that a circle is drawn around the intersection of the first rotor 2A and the second rotor 2B or the first rotor 2Δ and the third rotor 2C, and the center 3a of the circle and the first rotor 2A is
It is made up of the remaining part by drawing a circle with a radius approximately equal to (to be exact, slightly smaller) the inner diameter of the part of the rotor chamber R that houses the first rotor 28, and removing the part that protrudes from this circle. It is something. Further, in the case of this embodiment, the combustion chamber 7 is configured to have a shape equivalent to the above-mentioned deleted portion.

Further, the casing 1 is formed with a rotor chamber R that matches the shape of the three rotors 2A, 2B, and 2C arranged on the above-mentioned straight line.

When the rotors 2A, 2B, and 2c are assembled in the casing 1, the rotor chamber R1, the first rotor 2A, and the Contact portion 11 between rotor 28 and second rotor 2B
The contact portion 12 of the first rotor 2A and the third rotor 2c forms an annular space portion divided into two (a first space 13 and a second space 14). And such annular space part (
A suction port 9 is provided in the first space 13 and an exhaust port is provided in the second space 14 on the side of the rotor chamber that opens and closes the first space 13 and the second space 14 by rotation of the first rotor 2. Mouth 1
There is also another exhaust port 1 in a space communicating with the second space on the side of the rotor chamber that opens and closes with the rotation of the second rotor.
0' is formed. Furthermore, the space formed by the second rotor and the first rotor or the second rotor and the rotor chamber wall surface is under negative pressure in the space communicating with the first space 13 on the side surface of the rotor chamber that opens and closes due to the rotation of the second rotor. A communication port 20 is formed to prevent this from occurring. Also, the first
In the figure, a combustion gas passage 16 (portion represented by a mesh), which is a bypass path for combustion gas in the event of an explosion, is formed in the lower part of the contact portion 12 between the first rotor 2A and the third rotor 2C in the rotor chamber R. has been done. Furthermore, in order to improve the airtightness between each rotor or between each rotor and the inner wall of the rotor chamber during each process such as suction and compression, seals are provided at both ends of the protruding seal portion of the first rotor and at four parts of the first and second rotors. A plate S is inserted and attached by a spring 22 so as to be freely protrusive.

Moreover, as shown in FIG. 2, each of the above rotors 2A
, 2B, and 2C are each formed with a rotating shaft 3, and a bearing 21
It is rotatably attached to the casing 1 via. Furthermore, gears 8Δ, 8B, and 8C having the same number of teeth and meshing with each other are attached to the rotating shaft 3, and the second and third rotors 2B and 2C have the same number of rotations relative to the first rotor 2A. It is configured to rotate in the opposite direction.

Further, as shown in FIG. 1 or 2, a mounting hole 19 for attaching the spark plug 18 is located near the engine ignition timing in the portion of the side wall of the rotor chamber R where the third rotor 2C is installed. is formed. Although not shown, a carburetor is connected to the intake port 9 via an intake manifold, and a muffler is connected to the exhaust ports 10 and 10' via an exhaust manifold. .

Therefore, this rotary engine operates as follows. That is, initially, the first protrusion seal portion 4 of the first rotor 2A
a and the four parts 5 of the second rotor, the second protrusion seal part 4b of the first rotor 2A and the recess 5 of the second rotor, and the third protrusion seal part 4C of the first rotor 2A and the recess 5 of the second rotor.
are arranged so that they match (fit together), respectively, and the protrusion seal portions of the first rotor 2^, for example, the first protrusion seal portions 4
a passes through the suction port 9 formed in the first space, the first protrusion seal portion 4a in the first space 13 portion
Since the space formed by the contact portion 11 of the first rotor 2A and the second rotor 2B becomes larger as the rotors rotate, the air-fuel mixture containing fuel is sucked from the carburetor through the intake manifold. Then, as the rotor further rotates, the second protrusion seal portion 4b is removed from the partition wall R1 of the rotor chamber.
, and further passes through the suction port 9, the first protrusion seal portion 4a and the second protrusion seal portion 4b form a space, that is, the maximum volume corresponding to the bottom dead center of the reciprocating engine, completing the suction process). After the rotor rotates in this state, when the first protrusion seal portion 4a passes through the partition wall R2 of the rotor chamber, the second protrusion seal portion 4b and the contact portion 12 between the first rotor 2A and the third rotor 2C are formed. As the rotor rotates, the space becomes smaller, or compressed. When the compression reaches the maximum, the air-fuel mixture in the space is pushed into the combustion chamber 7 of the third rotor 2C, and at this time the spark plug 18 ignites, causing an explosion. Due to the explosion, according to the law of action and reaction, the first protrusion seal portion 4a or the second protrusion seal portion 4b of the No. 10-da 2A is pressed,
In FIG. 1, the third rotor 2C rotates clockwise, and the third rotor 2C is rotated counterclockwise as the recess corresponding to the first protrusion seal portion 4b is pressed. The rotation caused by the above explosion becomes the driving force for the rotary engine. Then, due to the explosion, the air-fuel mixture becomes a combustion gas, and the combustion gas passes through the combustion gas passage 16 (and directly thereafter) in the second space toward the exhaust port 10, 10' by the second protruding seal portion 4b. On the exhaust port 10 side, the contact portion 11 between the first rotor 2A and the second rotor 2B separates the combustion gas from the first space. is discharged to the idle side. In this case, the exhaust port 10' is the exhaust port 1.
The second rotor of the first rotor is formed at a location different from 0.
This is to discharge the combustion gas remaining in the space formed by the first rotor and the second rotor to the outside of the engine after the protruding seal portion 4b reaches the partition wall R3 of the rotor chamber and closes the exhaust port 10. In the above description, mainly the first rotor 2
A and the third rotor 2C were mainly explained, but the second rotor 2
The rotor B rotates in conjunction with the first rotor 2A and the third rotor 2C1, and together with the first rotor 2A, forms one seal part essential for the intake and exhaust processes in this rotary engine.

In the above embodiment, the second and third rotors are configured to rotate at the same speed as the first rotor; however, the second and third rotors are Seal portion and recessed portions of the second and third rotors (including the combustion chamber)
Any structure is sufficient as long as it can be engaged with the first
The number of protruding seal parts on the rotor is four, and the second and third rotors are eight, so that for one rotation of the first rotor, the second
, the third rotor may rotate twice, using a gear train. In addition, in this embodiment, three protruding seal portions on the first rotor and three corresponding recesses on the second and third rotors are formed, but considering the influence of the shape and dimensions of the engine on combustion efficiency, Accordingly, a greater number of protruding seal portions and corresponding four portions may be formed.

Furthermore, although the above embodiment has been described for the case where it is implemented as an internal combustion engine, a valve mechanism is provided at the inlet port, the part where the spark plug is attached, and the discharge port in the above embodiment, and the first rotor in the second space part is provided with a valve mechanism. If a suction port equipped with a valve mechanism is formed near the contact portion between the rotor and the third rotor, it can be used as a compressor. Incidentally, in such a case, a vaporizer and a muffler are unnecessary.

(Effects of the Invention) As can be seen from the above-mentioned configuration and operation, the rotary engine according to the present invention has a rotary shaft that is not eccentric, unlike the conventional Wankel type rotary engine, so there is little mechanical loss, and vibrations caused by eccentricity are reduced. Since this does not occur, quiet and smooth rotation can be achieved. In addition, from a manufacturing technology standpoint, compared to conventional Wankel-type rotary engines, the shapes of the rotor, casing, and rotating shaft are basically perfect circles, making it simpler and easier to manufacture and supply. become. In addition, since there is no vibration due to eccentricity, fatigue failure is less likely to occur in the rotating shaft portion, so the shaft diameter can be made smaller and the weight can be reduced. Therefore, when used as an internal combustion engine, combined with low mechanical loss, it is possible to improve fuel efficiency, which is considered the biggest drawback of rotary engines.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing the structure of a rotary engine according to the present invention, FIG. 2 is a plan sectional view taken along arrow X-X in FIG. 1, and FIG.
The figure is a front sectional view of a conventional Wankel-type rotary engine. R... Rotor chamber, CL C2, C3... Basic outline, 1... Casing, 2... Rotor, 3... Rotating shaft, 4... Protrusion seal portion, 5, 6... - Recessed portion, 7 combustion chamber, 8... gear, 9... suction port, 10... exhaust port, 11... contact portion between first rotor and second rotor, 1
2... Contact portion between the second rotor and the third rotor, 13...
・First annular space, 14...Second annular space, 8A, 8
B, 8C...gears.

Claims (1)

[Claims] In a rotary engine in which a rotor rotates within a casing, first, second, and third rotors whose basic outline is a perfect circle are arranged at two different locations on the outline of the first rotor.
The third rotor is arranged so that the basic outline of the third rotor is circumscribed, protruding seal parts are formed at equal intervals on the outer side of the basic outline of the first rotor, and protruding seal parts are formed on the inner side of the basic outline of the second rotor, and the protruding seal parts almost match with the above-mentioned protruding seal parts. A recess is formed, and a recess that matches the protrusion seal portion and a combustion chamber that communicates with the recess are formed inside the basic outline of the third rotor, and the rotor chamber of the casing in which the three rotors arranged as described above are housed is formed as described above. The rotor chamber, the first rotor, the contact portion between the first rotor and the second rotor, and the first rotor are formed so as to match the rotational external locus of each rotor, and further include the rotor chamber portion of the casing in which the first rotor is housed, the first rotor, the contact portion between the first rotor and the second rotor, and An annular space portion formed by the contact portion of the rotor and the third rotor, and an inlet is formed in the portion that performs suction action as each of the rotors rotates, and an exhaust port is formed in the portion that performs exhaust action. In addition, by connecting the rotating shafts that support each of the rotors with gears so that the second and third rotors rotate in the opposite direction to the rotation of the first rotor, the protruding seal portion of the first rotor is connected to the second and third rotors. 3 Rotates so as to fit into the recess of the rotor, and within the annular space divided into two,
A rotary engine characterized in that the rotary engine is configured to perform suction, compression, explosion, and exhaust processes as the rotor rotates.