JPS61200303A - Rotary piston engine - Google Patents

Abstract

PURPOSE:To improve the discharge efficiency of a working fluid ever so better, by installing an opening part of an outflow passage to be formed in a flank surface of a rotor, in a position more rearward than the central part of the flank surface, in case of an engine bearing the above caption, provided with the almost equilaterally triangular 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, on each flank surface 11 of the rotor 8, an opening part 16 is formed in a position more rearward than the central part of the flank surface 11 in relation to a rotor rotating direction, and this opening part 16 is made to be connected to the outside via a rotor flow passage 17, a cylindrical empty chamber 15 and a rotary shaft flow passage 18.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a rotary piston engine in which a substantially equilateral triangular rotor is housed in a two-node trilobal rotor housing for eccentric rotation. It is related to.

(Prior Art) Conventional rotary piston engines of this type, for example, in rotary piston type compression engines, in order to obtain high discharge pressure, a discharge boat is provided in the rotor housing housing the rotor, and a reed valve is installed at the discharge port of the rotor housing. There was one that had a . This reed valve closes the flow path by bending an elastic plate and pressing its back against the discharge port.As the rotor rotates, the working chamber is formed by the inner surface of the rotor housing and the flank surface of the rotor. When the pressure increases and exceeds a certain pressure, the elastic plate is pushed back and the flow path of the discharge port is opened.

(Problems to be Solved by the Invention) However, in such a rotary piston engine, the discharge port, the valve, and the suction boat are attached to the rotor housing, so the engine as a whole has the disadvantage of becoming large.

This invention is an attempt to solve such problems.

[Structure of the invention]

(Means for Solving the Problems) The structure of the present invention is such that a substantially equilateral triangular rotor is accommodated in a two-node, trilobal rotor housing so as to rotate eccentrically, and the inner surface of the rotor housing and the flanks of the rotor are In a rotary piston engine in which an outflow passage is formed in the rotor leading from a working chamber formed by a face to the outside of the rotor housing, the opening of the outflow passage formed in the flank face is It is a rotary piston engine characterized by being located behind the center of the flank surface.

(Operation) The operation of the rotary piston engine of the present invention is such that a substantially equilateral triangular rotor is accommodated in a two-section trilobal rotor housing for eccentric rotation, and is formed by the inner surface of the rotor housing and the flank surface of the rotor. In a rotary piston engine in which an outflow passage leading from a working chamber to the outside of the rotor housing is formed in the rotor, the opening of the outflow passage formed in the flank face of the rotor is Since this is a rotary bislin engine characterized by being located rearward from the center, the entire engine can be made smaller and the fluid in the working chamber can be efficiently discharged to the outside of the rotor housing.

(Example) An example of the present invention will be described with reference to the drawings in the case of a rotary piston type compression engine. As shown in Fig. 1-2, 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 with a driven gear 4 screwed at one end by bearings 3, 3. 5 is pivotally supported, and its rotation axis 5
Crank arms 6, 6 are integrally formed on both sides of the central portion of the , and a substantially equilateral triangular rotor 8 is rotatably supported on the crank arms 6, 6 via bearings 7, 7. An internal gear 9.9 is installed on the back side of the rotor housing 2, and the internal gears 9, 9 are loosely fitted to the rotating shaft 5 and meshed with fixed gears 10, 10 fixed to the rotor housing 2. . Therefore, when the rotating shaft 5 rotates, the rotor 8 moves its internal gear 9.9 to the fixed gear 10 of the rotor housing 2.
．． 10, and the eccentric rotation causes the working chamber 12 formed by the inner surface of the rotor housing 2 and the flank surface 11 of the rotor 8 to be rotated eccentrically while meshing with the rotor 10.
The volume of can be 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. Each flank surface 11, 11.11 of the rotor 8 has a
An opening 16.16.16 is formed at a position rearward from the center of each flank surface IL IL 11 with respect to the rotational direction of the rotor. Outflow channel 17.17.
17 is formed, and the rotating shaft 5 has a rotating shaft outflow passage 18 connecting the cylindrical cavity 15 and the outside of the rotor housing 2.
is formed. Further, a chamber 19 is airtightly attached to the rotor housing 2 so as to cover the open end of the rotary shaft outlet passage 18 provided in the rotary shaft 5, and a discharge port 20 is provided at one end of the chamber 19. There is. Further, the valve body 13 can be used as a balance weight for the rotor 8, and when the rotor 8 rotates, the balance of the load applied to the rotating shaft 5 and the bearing 3.3 can be adjusted. .

Next, the position of the suction boat 1 and the movement of the opening 16 of the rotor outlet passage 17 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 are formed by the inner surface of the rotor housing 2, which is provided with the first suction port Ia and the second suction port 1b, and the outer surface of the rotor 8.
, B, and C are formed, and on the signal surface (
The working chamber A in the upper left is an intake chamber where outside air is being sucked in from the first intake port Ha, and the working chamber B in the upper right is a compression chamber whose volume is gradually being reduced. The fluid compressed in the working chamber B is led from the working chamber B to the cylindrical cavity 15 through the rotor outflow passage 17,
It is discharged from the cylindrical chamber 15 through the rotating shaft outflow path 1B to the discharge boats 1 to 20 (see Figure 2), and the lower working chamber C has just completed suction from the second suction boat 1b. , is the intake chamber where the volume of the working chamber C is maximum, and shows the state immediately before compression.

When the rotating shaft 5 further rotates clockwise, the volume of the upper left working chamber A is further expanded, and outside air is sucked into the working chamber A from the first suction port Ha, as shown in FIG. In the second working chamber B, the volume of the working chamber B is further reduced, the pressure is further increased, and the fluid is subsequently discharged from the discharge bows 1 to 20 (see FIG. 2) through the rotary shaft outflow path 18. In the working chamber at the lower right, suction from the second suction port 1b begins and a new intake chamber is formed, and the working chamber C at the lower left replaces the compression chamber.

When the rotating shaft 5 further rotates clockwise, the volume of the upper working chamber A reaches its maximum, as shown in FIG. The rotor outflow path 17 of 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 is transferred to the rotor outflow path 17.
The liquid is introduced into the cylindrical cavity 15 through the cylindrical cavity 15, passes through the rotating shaft outflow passage 18, and is discharged from the discharge port 20 (see FIG. 2).

When the rotary shaft 5 further rotates clockwise, a new working chamber E is formed in the upper left as shown in FIG. 6, and suction from the first suction chamber 1a begins and a new intake chamber is formed. 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 chamber 1b, and the lower left working chamber C has the smallest volume and the highest pressure. ,
The discharge boat 20 passes through the rotating shaft outflow passage 18 (see Fig. 2).
It is discharged from.

Although this embodiment describes 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-mentioned configuration, not only can the engine itself be made smaller, but also the opening of the outflow passage formed in the flank face can be arranged in the direction of rotation of the rotor. On the other hand, since it is located rearward from the center of the flank surface, the fluid within the working chamber can be efficiently discharged to the outside of the rotor housing.

Further, in the present invention, if the valve body of the valve provided in the flow path within 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 drawings]

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. It is. 2... Rotor housing 8... Rotor 11... Flank surface 12... Working chamber 13... Valve body 17... Rotor outflow passage 18... Rotating shaft outflow passage 110- Ward guard sect〈 sect〈 majo

Claims (1)

[Claims] (1) A substantially equilateral triangular rotor is accommodated in a two-node, three-lobed rotor housing so as to rotate eccentrically, and the rotor is passed from the working chamber formed by the inner surface of the rotor housing and the flank surface of the rotor to the outside of the rotor housing. A rotary piston engine in which a communicating outflow passage is formed in the rotor, characterized in that the opening of the outflow passage formed in the flank face is located rearward from the center of the flank face with respect to the rotational direction of the rotor. A rotating piston engine.