JPS6111402A - Rotary engine - Google Patents

Abstract

PURPOSE:To decrease mechanical loss and get quiet and smooth rotary motion, by coupling together, through gears, rotary shafts which support three rotors respectively, as the second rotor and the third rotor rotate reversely to the rotating direction of the first rotor. CONSTITUTION:Three rotors 2A-2C are so arranged as the outlines of the second rotor 2B and the third rotor 2C make contact with two points on the outline of the first rotor 2A. Then, a space is divided by the parts of contact between two of the rotors 2A-2C, and two circular spaces 13, 14 are formed. An inlet 9 and an outlet 10 which are opened/closed by the rotary motion of the first rotor 2A, are formed. Rotary shafts 3a-3c which support three rotors 2A-2C respectively, are coupled together through gears 8 as the second rotor 2B and the third rotor 2C rotate reversely to the rotating direction of the first rotor 2A. In this way, mechanical loss is decreased, and quiet and smooth rotary motion can be got.

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) (Industrial Application Field) 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 type rotary engine (see Fig. 4) has a rotor 21 that rotates within a casing 11 that is constructed of a peritrochoid curve and has an internal line of the casing 11, which is excellent in terms of quietness, smoothness of rotation, etc. ) 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 2') do not match (see Figure 4), mechanical loss due to eccentricity and Due to the accompanying vibrations, it was not possible to achieve the completely smooth rotation of an electric motor, and the rotary engine was not perfect.

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.

(Structure of the Invention) (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. The rotor is arranged so that the basic outline of the second and third rotors circumscribes at two different locations on the outline of the first rotor, and protruding seal portions are formed at equal intervals on the outside of the basic outline of the first rotor, forming a recess that matches the protrusion seal portion on the inside of the base outline of the second rotor, and a recess that matches the protrusion seal portion and a combustion chamber that communicates with the recess on the inside of the base outline of the third rotor; The rotor chamber of the casing in which the three rotors arranged as described above are housed is formed to match the rotational outline trajectory of each of the rotors, and the rotor chamber in the rotor chamber portion of the casing in which the first rotor is housed; It is an annular space portion divided into two (referred to as a first space and a second space) formed by a first rotor, a contact portion between the first rotor and the second rotor, and a contact portion between the first rotor and the third rotor. The suction port is placed in one place (the first space) of the two parts of the part that opens and closes by the rotation of the first rotor, and the inlet is placed in the other part (the second space).
By forming an exhaust port in the space) and connecting the rotating shafts supporting the three rotors with gears so that the second and third rotors rotate in the opposite direction to the rotation of the first rotor,
In the annular space divided into two parts, suction, compression, and
It is characterized by being configured to perform each process of explosion and exhaust.

(Function) Therefore, this rotary engine with the above configuration is
When the protrusion seal portion (first protrusion seal portion) of the rotor passes through the suction port formed in the first space,
a contact portion between the first rotor and the second rotor in the first space;
The air-fuel mixture is sucked into the space formed by the first sealing protrusion, and the next sealing protrusion (second sealing protrusion) of the rotor passes through the intake port, causing the rotation of the second sealing protrusion. Accordingly, compression is performed at the contact portion between the second protrusion 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 to the third rotor by the second protrusion seal portion.
It is pushed into the combustion chamber of the rotor, and when it does, the air-fuel mixture ignites and explodes. Then, the explosive force is applied to the second rotor of the first rotor.
The first rotor and the third rotor are rotated in opposite directions by acting on the protruding seal portion and the recess including the combustion chamber of the third rotor. 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. The suction, compression, explosion, and exhaust processes of this rotary engine are performed in succession as described above, and in each of the above steps, the rotary engine rotates around the rotation axis of each rotor. do.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front sectional view showing the structure of a rotary engine according to the present invention, FIG. 2 is a similar plan sectional view, and FIG. 3 is a similar front sectional view showing another embodiment.

In the figure, ■ is the casing, R is the rotor chamber formed in the casing, 2A 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. a protruding seal portion; 5, a recess formed in the second rotor; 6, a recess formed in the third rotor; 7, a combustion chamber communicating with the recess 6; 8, a gear connecting the rotors;
9 is an intake port, and 10 is an exhaust port.

When the rotary engine according to the present invention is explained based on FIG. 1, the first, second, and
Third three rotors 2A, 2B.

2C is the rotation of each rotor so that the basic outlines of the second and third rotors are circumscribed at two different points on the basic outline of the first rotor, in this example, two points on the diameter line of the first rotor. The axes 3 (3a, 3b, 3c) are arranged so that their centers are located on a straight line and the respective basic outline lines c1, c2, and C3 (indicated by dashed-dotted lines in FIG. 1) are circumscribed. A plurality of protruding seal parts 4, two in this embodiment (a first protruding seal part 4a, a second protruding seal part 4b), are formed at equal intervals on the outside of the basic outline of the first rotor 2A, and the second rotor A recess 5 that matches the protrusion seal portion 4 is formed on the inside of the base outline, and a recess 6 that matches the protrusion seal portion 4 is formed on the inside of the base outline, and a recess 6 that communicates with the protrusion seal portion 4 is formed on the inside of the base outline. A combustion chamber 7 is formed.

Further, the casing 1 is formed with a rotor chamber R that matches the shape of the three rotors 2A, 2B, and 2G arranged on the above-mentioned straight line. When each rotor 2A, 2B, 2C is assembled to casing 1,
In the portion of the rotor chamber R that houses the first rotor 2A,
As shown in FIG. 1, rotor chamber R1 No. 10-2A
, the contact portion 11 between the first rotor 2A and the second rotor 2B, and the contact portion 12 between the first rotor 2A and the third rotor 2C,
An annular space divided into two parts (first space 13, second space 1
4) is formed. Then, such annular space portion (first
The first space 1 on the side surface of the rotor chamber opens and closes by the rotation of the first rotor 2A (space 13, second space 14).
An inlet 9 is formed within the space 3 , and an exhaust port 10 is formed within the second space 14 . In addition, in FIG. 1, in the lower part of the contact portion 15 between the first rotor 2A and the third rotor 2C in the rotor chamber R, in order to improve the discharge of combustion gas in the event of an explosion,
A combustion gas passage 16 (portion represented by a mesh) is formed. In addition, each of the above rotors 2A, 2B, 2C
A rotating shaft 3 is formed in each of the casings 1 and 3, and is rotatably attached to the casing via a bearing 18. moreover,
The rotating shaft 3 has gears 8A having the same number of teeth that mesh with each other.
, 8B, and 8C are attached to the first rotor 2A,
The second and third rotors 2B and 2C are configured to rotate in opposite directions at the same rotation speed (see FIG. 2). Further, an attachment hole 1 for attaching a spark plug 18 is provided near the engine ignition timing in a portion of the side wall of the rotor chamber R where the third rotor 2C is installed.
9 is formed. Although not shown, a carburetor is connected to the intake port 9 via an import manifold, and a muffler is connected to the exhaust port 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 2^
A and the recessed portion 5 of the second rotor are also connected to the second rotor 2A of the first rotor 2A.
Assuming that the protrusion seal portion 4B and the recess 5 of the second rotor are aligned in a straight line, the protrusion seal portion of the first rotor 2A, for example, the first protrusion seal portion 4a, connects the suction port 9 formed in the first space. By passing through, the first spatial portion 1
3, the first protrusion seal portion 4a, the first rotor 2A and the second
Since the space formed by the contact portion of the rotor 2B increases as the rotor rotates, the air-fuel mixture is sucked from the carburetor. When the rotor further rotates and the second protruding seal portion 4b passes through the suction port 9, a space is formed by the second protruding seal portion 4b and the contact portion between the first rotor 2A and the third rotor 2C. However, as the rotor rotates, it becomes smaller, that is, it becomes compressed. When the compression reaches its maximum, the air-fuel mixture in the space is forced 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
The rotor 2A rotates clockwise in FIG.
A force acts on the rotor 2C to rotate it counterclockwise. The rotation caused by the above explosion becomes the driving force for the rotary engine. Then, due to the above explosion, the mixture turns into combustion gas,
The combustion gas passes through the second space and the combustion gas passage 16, and then flows through the second space to the exhaust port 10 by the second protruding seal portion 4b.
On the exhaust port 10 side, the combustion gas is isolated from the first space by the contact area between the first rotor 2A and the second rotor 2B, so the combustion gas is discharged from the exhaust port 10 to the atmosphere. .

In the above description, the explanation has been mainly focused on the first rotor 28 and the third rotor 2C, but the second rotor 2B rotates in conjunction with the first rotor 28 and the third rotor 2C, and the present rotary engine Together with the first rotor 2A, it forms one seal part essential for the suction/exhaust process. In the above embodiment, the second and third rotors are configured to rotate at the same rate as the first rotor. For example, as shown in FIG. 3, four protruding seals may be provided on the first rotor. The gear train may be configured such that the second and third rotors rotate twice for one rotation of the first rotor.

(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 fractures are less likely to occur in the rotating shaft, etc., so the shaft diameter can be made thinner and the weight can be reduced, which, together with low mechanical loss, is the biggest drawback of rotary engines. It is also possible to improve fuel efficiency.

[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 similar plan sectional view, Fig. 3 is a similar front sectional view showing another embodiment, and Fig. 4 is a conventional FIG. 2 is a front sectional view of a Wankel-type rotary engine. R...Rotor chamber, 1...Casing sink, 2...Rotor, 3...Rotating shaft, 4...Protrusion seal portion, 5.6
...4 parts, 7 combustion chamber, 8...gear, 9...intake port, 10...exhaust port.

Claims (1)

[Claims] In a rotary engine in which a rotor rotates inside a casing, the first, second, and third rotors whose basic outline is a perfect circle are
The basic outline of the second and third rotors is arranged so as to circumscribe the basic outline of the first rotor at two different locations on the external outline of the first rotor, protruding seal portions are formed at equal intervals on the outside of the basic outline of the first rotor, and the second rotor A recess that matches the protrusion seal part is formed inside the base outline of the third rotor, and a recess that matches the protrusion seal part and a combustion chamber that communicates with this recess are formed inside the base outline of the third rotor, and The rotor chamber of the casing housing the three rotors is formed to match the rotational outer locus of each of the rotors, and the
A two-divided annular space portion formed by the rotor chamber, the first rotor, the contact portion between the first rotor and the second rotor, and the contact portion between the first rotor and the third rotor in the rotor chamber portion in which the rotor is housed. A suction port is formed in one of the two parts of the part that opens and closes by the rotation of the first rotor, and an exhaust port is formed in the other part, and the three rotors are supported. By connecting the rotary shaft with gears so that the second and third rotors rotate in the opposite direction to the rotation of the first rotor, the protrusion seal of the first rotor as the rotor rotates within the annular space divided into two. A rotary engine characterized by being configured so that the suction, compression, explosion, and exhaust processes are performed by rotating its parts.