JPS5843621Y2 - 2 stage rotary engine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a two-stage rotary engine that compresses or expands intake air and combustion gas in two stages, and more particularly to a two-stage rotary diesel engine.

The working chamber of a small-capacity high-pressure stage rotary engine unit and the working chamber of a large-capacity low-pressure stage rotary engine unit are communicated through an intake communication port and an exhaust communication port, so that intake air is compressed in two stages and combustion gas is expanded in two stages. A two-stage rotary diesel engine is already known, but this type of rotary diesel engine is also required to have high thermal efficiency and clean exhaust gas, just like general diesel engines.

In this invention, the intake communication port that connects the working chambers of the high-pressure stage and low-pressure stage rotary engine units is not made into a simple cylindrical hole as in the past, but a swirl generator is disposed inside the cylindrical hole. This structure is intended to give a swirl to the intake air flow fed into the high-pressure stage rotary engine unit, thereby promoting the mixing of intake air and fuel.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a two-stage rotary diesel engine having a high-pressure stage rotary engine unit 1 and a low-pressure stage rotary engine unit 2.

The rotary engine units 1 and 2 have the same basic structure except for their capacities.

That is, each rotary engine unit) L2H engine casing 10, 20, rotor 12, 22, and rotor shaft 13.23ffi have as basic elements, and each rotor 12, 22 of both units 1, 2 is They are designed to rotate synchronously.

The working chamber 15 on the high-pressure stage side and the working chamber 25 on the low-pressure stage side are communicated with each other through a cylindrical intake communication port 3 and an exhaust communication port 4.

Each engine casing 10.20 has a multi-arc inner surface 14
．． It is constructed by covering both sides of a rotor housing IL21 with 24 side housings.

Each rotor 12, 22 has three apex seals 16, 16, 16 or 26.2 on each apex.
6.26' is installed, and each apex seal seals between the rotor and the inner surfaces 14 and 24 of the housing.

A fuel injection valve 5 is installed on the high-pressure stage rotary engine unit 1 side, and an intake port 27 and an exhaust port 28 are formed on the low-pressure stage rotary engine unit 2 side. A swirl generator 6, which will be described in detail below, is disposed.

In the embodiment of FIG. 1, the swirl generator 6 (see FIG. 2)
is sandwiched between both engine units 1 and 2, and in this case, the circular hole 30 in the swirl generator 6 is coaxial with the intake communication port 3.

The swirl generator 6 is entirely made of a heat-resistant material and has a button shape, and in the embodiment shown in FIG.

This vane 31 is fixed and dead, and the first stage compressed intake flow B is caused by the vane? When passing through 1, a swirl flow is created.

The two-stage rotary diesel engine shown in FIG. 1 operates as follows.

Intake air A passes through the intake port 27 into the working chamber 25 of the low-pressure rotary engine unit 2, is compressed in the first stage by the rotor 22, becomes first-stage compressed air B, passes through the intake communication port 3, and becomes high-pressure. It flows into the working chamber 15 of the stage rotary engine unit 1.

At this time, the first stage compressed intake air flow B is turned into a swirling flow by the swirl generator 6, but this swirling energy is maintained in the final stage 1 of the second stage compression to mix fuel and intake air in the next fuel injection positive. acts to promote

Fuel F is injected from five fuel injection valves.

The fuel F burns in the high-pressure stage side working chamber 1 to become combustion gas, expands in the same chamber in the first stage, and then is blown into the working chamber 25 of the low-pressure stage rotary engine unit 2 through the exhaust communication port 4. 1, and then expands in a second stage to apply rotational force to the rotor 22.

The combustion gas expanded in the second stage within the high-pressure stage side working chamber 25 becomes exhaust gas and is discharged from the exhaust port 28.

FIG. 3 shows another installation example of the swirl generator according to the present invention.

This is because the swirl generator 6 shown in Fig. 2 has a single large diameter (
A single cross-shaped blade 31 is provided in a circular hole 30 with a diameter l), whereas two circular holes 30.3 with a small diameter (diameter l') are provided.
A cross-shaped blade 31 is provided inside each of the blades.

In this way, leakage of combustion gas to the intake side via the intake communication port 3 to the high-pressure stage rotary engine unit 1 side can be reduced.

In this case, two cruciform blades 31.3 are shown in FIG.
1 has its torsion angle directions opposite to each other, thereby preventing the two intake swirl flows passing through the two blades from colliding with each other.

Furthermore, Figure 3 TI? The symbol 19 on the C button is the high pressure stage side rotor.
・Side covering both sides of Uzing 11...The Uzing is covered.

Next, the effects of the present invention will be explained as follows.

(1) Mixing of intake air and fuel and vaporization of fuel are further promoted by flowing into the high-pressure stage side working chamber, which improves fuel combustion, increases output, reduces fuel consumption rate, and eliminates unburned components in exhaust gas. It has the effect of reducing

(2) Carbon generation is reduced due to improved combustion.

Accordingly, carbon adhesion to the rotor and rotor housing is reduced, and the cooling effect thereof is improved.

Furthermore, the reduction in carbon has the effect of reducing apex seal wear.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view of a two-stage rotary engine according to an embodiment of the present invention, and Figure 2 is similar to Figure 1.
The sectional view, FIG. 3, is a shape diagram of a swirl generator according to another embodiment of the present invention. 1... High pressure stage rotary engine unit, 2...
Low pressure stage rotary engine unit, 3...Intake communication port, 4...Exhaust communication port, 6...Swirl generator. 10.20...Engine casing, 11,21...
・Rotor...Using, 12.22...Rotor, 13
゜23... Rotor shaft, 14, 24-... Rotor housing inner surface, 15, 25... Working chamber, 30... Circular hole. 31... Feather.

Claims (1)

[Scope of utility model registration request] A rotor having three apexes that slides on the inner surface of the rotor housing is accommodated in an engine casing in which both sides of the rotor housing are covered with a sight housing. A small-capacity, high-pressure stage rotary engine unit 1 has two rotary engine units whose rotors are planetarily rotated around an eccentric shaft passing through the center of the engine casing.
and a low-pressure rotary engine unit 2 having a larger capacity than the high-pressure rotary engine unit 1, and a working chamber 15 of the high-pressure rotary engine unit 1.
and the working chamber 2 of the low pressure stage rotary engine unit 2.
5 communicate with each other through an intake communication port 3 and an exhaust communication port 4, and the intake communication port 3 includes a swirl generating device 6 having a blade 31 provided with a torsion angle θ to swirl the first stage compressed intake air flow Be. 2, which is characterized by having a
Stage type rotary engine.