JPS61200301A - Rotary piston engine - Google Patents

Abstract

PURPOSE:To make a sufficiently large opening area securable, by installing a flow passage, connecting an operating chamber to a rotor housing outer part, in a rotor, in case of the above-captioned engine provided with the rotor being eccentrically rotated. CONSTITUTION:A rotary shaft 5 is rotatably supported on bearings inside a two-joint, three-leaf type rotor housing 2 provided with two suction ports 1 and 1, and an almost equilaterally triangular rotor 8 is pivotally supported free of rotation by crank arms 6 and 6 solidly formed at both sides of the central part of this rotary shaft 5. With rotation of this rotary shaft 5, the rotor 8 is eccentrically rotated through engagement between an internal gear 9 and a fixed gear 10, whereby displacement in an operating chamber 12 is made so as to be continuously alterable. And, at the above-mentioned, a rotor flow passage 16 leading to a cylindrical empty chamber 15 inside the rotor 8 from its crank surface is formed in the rotor 8, while a rotary shaft flow passage 17 connecting the cylindrical empty chamber 15 to an outer part of the rotor housing 2 is made so as to be formed in the rotary shaft 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) This invention relates to a rotary piston engine that rotates a rotor eccentrically within a rotor housing.

(Prior Art) Conventional rotary piston engines of this type, for example, rotary piston type compression engines in which a substantially equilateral triangular rotor is rotated eccentrically within a two-section trilobal rotor housing, have a suction boat and a discharge port that are rotated by the rotor. Since it is mounted extremely close to the rotor housing in the radial direction, it has not been possible to obtain a sufficient opening area.

In addition, there is also known one in which either the suction port or the discharge port is attached to the rotor housing in the thrust direction of rotation of the rotor, but the opening position of ports 1 to 1 is the sealing member between the rotor and the rotor housing in the thrust direction ( For example, the oil ring could not be provided inward from the outermost position of the trajectory drawn by rotation.

(Problems to be Solved by the Invention) The present invention attempts to solve such problems by changing the opening position of the suction boat or discharge port to a sealing member between the rotor and the rotor housing in the thrust direction (
The purpose of this invention is to obtain a rotary screw engine which is provided inward from the outermost circumferential position of a locus drawn by rotation of an oil ring.

[Structure of the invention]

(Means for Solving the Problems) The structure of the present invention is a rotary piston engine that eccentrically rotates a rotor within a rotor housing, and a working chamber formed by an inner surface of the rotor housing and a flank surface of the rotor; The rotary piston engine is characterized in that a flow path connecting the rotor housing to the outside is provided within the rotor.

(Function) The rotary piston engine of the present invention rotates the rotor eccentrically within the rotor housing. The rotor is characterized in that a flow path connecting it to the outside is provided within the rotor, so that the opening position of the suction boat or discharge boat is determined by the rotation of the sealing member (for example, an oil ring) between the rotor and the rotor housing in the thrust direction. It is provided inward from the outermost circumferential position of the trajectory drawn.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings in the case of a rotary piston type compression engine in which a substantially equilateral triangular rotor is rotated eccentrically within a two-section trilobal rotor housing. 1st
As shown in FIG. 2, a rotor housing 2 in the form of two sections and three leaves, in which two suction boats 1.1 are provided, has a rotating shaft 5 with a driven gear 5 screwed to one end by means of bearings 3, 3. Crank arms 6 and 6 are integrally formed on both sides of the central portion of the rotating shaft 5, and a substantially equilateral triangular rotor 8 is rotatable on the crank arms 6 and 6 via bearings 7 and 7, respectively. Internal gears 9, 9 are installed on the back side of the rotor 8, and the internal gears 9, 9 are loosely fitted to the rotating shaft 5, and the fixed gear 10 is fixed to the rotor housing 2. .1
It is meshed with 0. Therefore, when the rotating shaft 5 rotates, the rotor 8 rotates eccentrically with its internal gears 9, 9 meshing with the fixed gears 10 and 10 of the rotor housing 2, and due to the eccentric rotation, the inner surface of the rotor housing 2 and the The volume of the working chamber 12 formed by the flank surface 11 of the rotor 8 is changed.

Next, a substantially semi-cylindrical valve body 13 is integrally formed in the center of the rotating shaft 5 and protrudes toward the side opposite to the center of gravity of the rotor 8. The rotor 8 rotates once every time the valve body 13 rotates, and a cylindrical cavity 15 is formed inside the rotor 8, which is closely opposed to the outer peripheral surface 14 of the valve body 13, and is concentric with the rotation axis of the valve body 13. From each flank surface 11, 11.11 of the rotor 8, a rotor flow passage 16.16.16 is formed, which leads to the cylindrical cavity 15, respectively, and the rotor shaft 5 is connected to the cylindrical cavity 15 and the rotor housing 2. A rotating shaft flow path 17 is formed that connects the outside of the rotary shaft.

Further, a chamber 18 is airtightly attached to the rotor housing 2 so as to cover the open end of the rotary shaft passage 17 provided in the rotary shaft 5, and a discharge boat 19 is provided at one end of the chamber 18. There is. Further, the valve body 13 can also be used as a balance weight for the rotor 8, and when the rotor 8 rotates, it can also adjust the balance of the load applied to the rotating shaft 5 and the bearing 3.3.

It is possible.

Next, the movements of the rotor 8 and the valve body 13 in this embodiment will be explained with reference to FIGS. 3 to 6. This shows the state when the rotating shaft 5 is rotated clockwise.

In the state shown in FIG. 3, three working chambers A, B, and C are formed by the inner surface of the rotor housing 2, in which the first suction boat la and the second suction boat 1-1b are respectively provided, and the outer surface of the rotor 8. On the drawing screen (the same applies hereafter), the upper left working chamber A is the intake chamber where outside air is being sucked in from the first intake port Ha, and the upper right working chamber B is gradually increasing in volume. This is a compression chamber that is being reduced in size, and the fluid compressed in the working chamber B is led from the working chamber B through the rotor flow path 16 to the cylindrical cavity 15,
The discharge bow passes from the cylindrical cavity 15 through the rotating shaft flow path 17 [
9 (see Figure 2), and the working chamber C at lower -6 = is the intake chamber where suction from the second suction bow Hb has just been completed and the volume of the working chamber C has reached its maximum. in,
This shows the state immediately before compression.

When the rotating shaft 5 further rotates clockwise, as shown in FIG. Outside air is sucked in from the first suction boat 1-1a, the volume of the working chamber B on the right side is further reduced, and the pressure is further increased. (See Figure 2). In the working chamber at the lower right, suction from the second suction bow Hb begins and a new intake chamber is formed, and the working chamber C at the lower left replaces the compression chamber.

When the rotary shaft 5 further rotates clockwise, the volume of the upper working chamber A reaches its maximum as shown in FIG.
Inhalation from -1b continues, and the rotor flow path 16 in the lower left working chamber C is opened by the rotation of the valve body 13 in the rotor 8, and the compressed fluid in the working chamber C passes through the rotor flow path 16 into the cylindrical cylinder. The liquid is introduced into the cylindrical chamber 15, passes through the rotary shaft channel 17, and is discharged from the discharge boat 19 (see FIG. 2).

When the rotating shaft 5 further rotates clockwise, a new working chamber E is formed at the upper left as shown in FIG. 6, and suction from the first suction port a begins, forming a new intake chamber.

The upper right working chamber A is replaced by a compression chamber, the lower right working chamber continues to receive suction from the second suction bow 1-1b, and the lower left working chamber C has the smallest volume and the highest pressure. hand,
The discharge port 1-19 passes through the rotating shaft flow path 17 (see Figure 2).
It is discharged from.

In this embodiment, fluid is sucked into the working chamber 12 from a suction port 1-1.1 provided in the rotor housing 2, and the compressed fluid compressed in the working chamber 12 passes through the rotor 8 and exits the rotor housing 2. In this rotary piston type compression engine, as shown in FIG. It is drawn into the working chamber 12 from the empty chamber 15 through the rotor flow path 16, and the working chamber 12
When the compressed fluid compressed in the rotor housing 2 is discharged from the discharge port [9, 19 provided in the rotor housing 2, the opening position of the rotor flow passage 16, 16, 16 provided in the rotor 8 is set according to the rotation direction of the rotor 8. This can also be carried out by displacing it to the side.

Furthermore, although these embodiments have been described with respect to a compression engine, it goes without saying that this rotary piston engine can also be used as an expansion engine.

〔Effect of the invention〕

Since the rotary piston engine of the present invention has the above-described configuration, the opening position of the suction boat or the discharge boat is determined by the locus drawn by the rotation of the sealing member (for example, an oil ring) between the rotor and the rotor housing in the thrust direction. It can be provided inward from the outermost circumferential position.

Further, in the present invention, if the valve body of the valve provided in the flow path in the rotor is also used as a balance weight attached to the rotating shaft, it is possible to further reduce the size of the engine.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along line xx' in FIG. 1, and FIGS. 3 to 6 are longitudinal sectional views showing the movement of the engine. , FIG. 7 is a sectional view showing another embodiment. 2...Rotor housing 8...Rotor 11...Flank surface 12...Working chamber 13...Valve body 16...Rotor flow path 17...Rotary shaft flow path area C O castle 1 da

Claims (1)

[Claims] (1) In a rotary piston engine that rotates a rotor eccentrically within a rotor housing, there is a flow path within the rotor that connects the working chamber formed by the inner surface of the rotor housing and the flank surface of the rotor with the outside of the rotor housing. A rotating piston engine characterized by being installed in.