JPH0223718B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a Wankel-type rotary piston machine that can be used as a compressor, blower, etc. by using the housing and rotor of a Wankel-type rotary engine, and is particularly suitable for use as a supercharger. related to things.

There are two types of superchargers attached to internal combustion engines: the so-called turbocharger, which uses exhaust gas from the internal combustion engine to drive the engine, and the mechanical drive, which uses the output of the internal combustion engine.The latter uses the driving force from the output shaft of the internal combustion engine. Since the mechanical loss is not small, it is necessary to minimize this as much as possible, and it is also desirable that it rotates smoothly.

By the way, to briefly explain the conventional Wankel type rotary piston machine, as shown in Figs.
A three-vertex rotor 3 supported and rotated by an input shaft 2 is installed inside. When the input shaft 2 is connected to the output shaft (not shown) of an arbitrary internal combustion engine via the belt 4 and rotated, a compressor or blower is created that takes in air from the intake hole 5 and discharges it from the exhaust hole 6. becomes. In order to smoothly rotate the input shaft 2, a balance weight 7 is attached to one end of the input shaft 2, a balance pulley 8 is attached to the other outer end, and a belt 4 is stretched thereon. However, in this configuration, the positional relationship of the rotor 3, balance weight 7, and balance pulley 8 with respect to the input shaft 2 shifts to the left and right as shown in FIG. 5, and they are not on a straight line perpendicular to the input shaft 2. , it is difficult to maintain balance, and in the case of imbalance, the input shaft 2 may swing.

The present invention aims to solve the above-mentioned drawbacks and is constructed as follows. In other words, inside the housing whose inner peripheral surface is a peritrochoid curve,
In a Wankel type rotary piston machine, which has a rotor inside and a housing with an intake hole and an exhaust hole,
By increasing the width of the rotor and supporting it by a pair of eccentric plates provided on the input shaft, a space is formed between the rotor and both eccentric plates, and the balance weight is moved approximately to the center of the input shaft, and its center of gravity is increased. This is a Wankel-type rotary piston machine characterized by the fact that the input shaft is sandwiched between the rotor and the input shaft, and the rotor is positioned opposite to the center of gravity of the rotor.

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

In FIGS. 3 and 4, a three-vertex rotor 12 is housed in a housing 11 whose inner peripheral surface is a peritrochoid curve, and an intake hole 13 and an exhaust hole 14 are provided in the wall surface of the housing 11. and rotor 12
As shown in FIG. 4, the width of the rotary engine is made thicker than that of the conventional Wankel type rotary engine, and it is supported by a pair of eccentric plates 16, 16 provided on the input shaft 15.
A space 17 is formed between the rotor 12 and both eccentric plates 16, 16. The width of the housing 11 is also made thick enough to accommodate the rotor 12, which has a thicker width. Balance weight 1 to approximately the center of input shaft 15
8 is attached, and its center of gravity 181 is positioned on the side opposite to the center of gravity 121 of the rotor 12 with respect to the input shaft 15. That is, a straight line a connecting both centers of gravity 121 and 181 is made to intersect the input shaft 15 at right angles at the center of the left and right bearings 19, 19 that support the input shaft 15. (See FIG. 6) A drive pulley 20 is attached to one outer end of the input shaft 15, and is connected to an output shaft (both not shown) of an internal combustion engine by a belt 21. The internal gear 22 of the rotor 12 is
External gear 24 fixed to side housing 23
(teeth ratio is 3:2), and due to the meshing of these gears, the rotation ratio of the input shaft 15 and rotor 12 is:
The ratio will be 3:1.

With this configuration, when the rotational force of the internal combustion engine is transmitted to the input shaft 15 via the belt 21 and the drive pulley 20, thereby rotating the rotor 12, outside air is taken in through the intake hole 13 and exhausted. Since it is discharged from the hole 14, if the exhaust hole 14 is connected to the intake pipe of an internal combustion engine, it will work as a supercharger. In this supercharger, unlike the conventional one, a straight line a connecting the center of gravity 121 of the rotor 12 and the center of gravity 181 of the balance weight 18
Since the rotor 12 and the balance weight 18 are in a positional relationship perpendicular to the center of the input shaft 15, it is easy to balance the rotor 12 and the balance weight 18, resulting in smooth rotation.

As explained above, the present invention is a Wankel-type rotary piston machine in which the center of gravity of the balance weight and the center of gravity of the rotor are positioned opposite to each other across the input shaft, resulting in balanced and smooth rotation. This is an excellent advantage when used as a supercharger.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing a conventional Wankel-type rotary piston machine, Fig. 2 is a longitudinal sectional side view thereof, Fig. 3 is a longitudinal sectional front view showing a Wankel-type rotary piston machine of the present invention, and Fig. 4 is a longitudinal sectional view thereof. A side view, FIG. 5 is an explanatory diagram showing the balance relationship of a conventional rotary piston machine, and FIG.
The figure is an explanatory diagram showing the balance relationship in the rotary piston machine of the present invention. 11...Housing, 12...Rotor, 121
... Center of gravity of the rotor, 13 ... Suction hole, 14 ... Exhaust hole, 15 ... Input shaft, 16 ... Eccentric plate, 17 ...
...Space part, 18...Balance weight, 181...
...The center of gravity of the balance weight.

Claims (1)

[Claims] 1. In a Wankel-type rotary piston machine, in which a rotor is housed in a housing whose inner peripheral surface is a peritrochoid curve, and the housing is provided with an intake hole and an exhaust hole, the width of the rotor is made thicker, and this is connected to the input shaft. A space is formed between the rotor and both eccentric plates by supporting the rotor by a pair of eccentric plates installed in the rotor, and a balance weight is placed approximately in the center of the input shaft so that its center of gravity faces the center of gravity of the rotor, sandwiching the input shaft. A Wankel-type rotary piston machine that is characterized by being installed at a certain position.