Elliptical rotor engine with self-pressurization structure

Abstract

A partition plate is integrally formed between an acting side wall and a connecting boss, so that an air inlet area and an air outlet area which are located on the two sides of the partition plate and isolated from each other are formed in a rotor, and a plurality of supercharging fan blades are arranged in the air inlet area and used for centrifugal rotation to achieve air flow supercharging; the roots of the plurality of pressurizing fan blades are connected with the circumferential surface of the connecting boss and are arranged around the autorotation center at equal angles, so that gradually-expanded channels are formed among the pressurizing fan blades, a circle of confluence channels are arranged in the air inlet area along the inner side edge of the acting side wall, and the confluence channels are communicated with the gradually-expanded channels; the two sides of the rotor of the rotor engine are partitioned through the partition plates, normal air inlet and exhaust functions are guaranteed, the air inlet side of the rotor is provided with the supercharging fan blades rotating synchronously with the rotor, air in the air inlet area is entrained through rotation of the rotor, centrifugal supercharging airflow is formed through driving, the air inlet pressure is effectively increased, and then the air inlet amount of a combustion chamber is increased.

Description

Technical Field

[0001] The invention relates to the technical field of rotary engines, and in particular to an elliptical rotary engine with a self-supercharging structure. Background Art

[0002] As an important part of the engine's intake and exhaust system, the supercharging system is generally used in traditional engines. By effectively utilizing exhaust energy, the intake pressure is increased, thereby increasing engine power. For a small and compact rotary engine, the supercharging system is of great significance for its high-altitude power recovery.

[0003] However, as a new type of engine, the structure of the elliptical rotor engine is quite different from that of the traditional engine. Its intake and exhaust are carried out through the end covers on both sides, and the exhaust gas is not easy to collect. The turbocharging optimization structure design is complicated. The rotor engine supercharging systems in the prior art are all external supercharging systems, that is, a turbofan is arranged in the intake duct, and the turbofan is installed on the rotating shaft. This type of external supercharging system brings additional mechanical structure, which not only increases the overall weight of the engine and increases the difficulty of assembly, but also increases the overall structural size of the rotor engine. As an aircraft engine, the elliptical rotor engine extremely pursues power-to-weight ratio and miniaturization design. Therefore, the supercharging system in the prior art is not suitable for the elliptical rotor engine. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide an elliptical rotor engine with a self-supercharging structure to overcome one or more problems caused by the limitations and defects of the related art to a certain extent.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] An elliptical rotor engine with a self-supercharging structure comprises an intake end cover, a cylinder body, an exhaust end cover and a rotor, wherein the rotor comprises an integrally formed working side wall and a connecting boss, wherein the working side wall is formed by connecting and closing a double-arc epicycloid to form a nearly elliptical structure, the connecting boss is coaxially arranged on the rotation center of the rotor, a partition is integrally formed between the working side wall and the connecting boss to form an intake area and an exhaust area located on both sides of the partition and isolated from each other inside the rotor, the intake area is connected to an intake hole on the intake end cover, the exhaust area is connected to an exhaust hole on the exhaust end cover, an intake port and an exhaust port connected to a combustion chamber of the cylinder body are arranged on an outer edge surface of the working side wall at positions corresponding to corresponding stroke phases, the intake port is connected to the intake area, and the exhaust port is connected to the exhaust area;

[0007] The connecting boss is higher than the plane of the partition, and several booster blades are arranged in the air intake area for centrifugal rotation to achieve airflow suction and supercharging. The roots of several booster blades are connected to the circumferential surface of the connecting boss and are arranged at equal angles around the rotation center of the rotor to form a gradually expanding channel extending from the circumference of the connecting boss to the inner edge of the working side wall between each booster blade. A circle of converging channels is arranged along the inner edge of the working side wall in the air intake area, and the converging channels connect each gradually expanding channel, and the converging channels are connected to the combustion chamber through the air intake.

[0008] Furthermore, the booster blades are integrally formed with the rotor, the lower end surface thereof is integrally connected to the partition plate, and the blade tip is integrally connected to the inner side edge surface of the working side wall.

[0009] Furthermore, a confluence notch is formed by cutting off the lower side corner of the blade end of the boost blade to connect adjacent gradually expanding channels, and the confluence channel is formed by a plurality of confluence notches, partitions and the inner side edge of the working side wall.

[0010] Furthermore, the upper edge of the air inlet is flush with or lower than the upper edge of the converging notch.

[0011] Furthermore, the area on the intake side of the partition close to the air inlet is sunken to form an intake flow channel connected to the air inlet, and a protrusion is formed on the exhaust side of the partition. The intake flow channel extends from the inner edge of the working side wall to the outer peripheral surface of the connecting boss. The lower edge of the air inlet is located at the bottom of the intake flow channel, which is used to increase the diameter of the air inlet.

[0012] Furthermore, an area on the partition close to the exhaust port protrudes into the exhaust zone to form a collection barrier, and an exhaust channel is set in the collection barrier area, and the exhaust channel is connected to the exhaust hole for exhaust. A plurality of reinforcing ribs distributed according to dynamic balance are protruded in the exhaust zone, and both ends of the reinforcing ribs are respectively connected to the inner edge of the working side wall and the outer peripheral surface of the connecting boss.

[0013] Furthermore, the number of boost blades is no less than 9.

[0014] Furthermore, the booster blades are arranged at an angle, and the angle between the blade plane and the axial generatrix of the connecting boss is 30°-75°.

[0015] Compared with the prior art, the elliptical rotor engine with a self-supercharging structure of the present invention has the following beneficial effects:

[0016] The structure of the rotor is improved and designed. The rotor is partitioned on both sides by partitions to isolate the intake and exhaust to ensure normal intake and exhaust functions. At the same time, booster blades that rotate synchronously with the rotor are set on the intake side of the rotor. The rotation of the rotor is used to suck the air in the intake area and drive the formation of centrifugal boost airflow, which effectively increases the intake pressure and thus improves the intake volume of the combustion chamber. The booster blades also have a structural reinforcement function. Under the basic requirement of ensuring the strength of the rotor structure, the rotor engine is given the function of self-supercharging. The booster blades are built into the rotor. Compared with an external booster impeller, it does not increase the mechanical structure and accessories of the rotor engine, does not occupy additional installation space of the rotor engine, and is in line with the design concept of high power-to-weight ratio and miniaturization of aircraft engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the elliptical rotor engine disclosed in the present invention;

[0018] Figure 2 It is an exploded view of the assembly of the elliptical rotor engine disclosed in the present invention;

[0019] Figure 3 It is a cross-sectional view of the elliptical rotor engine disclosed in the present invention;

[0020] Figure 4 for Figure 2 A stereoscopic view of the middle rotor from the intake side perspective;

[0021] Figure 5 for Figure 2 Side view of the intake side of the middle rotor;

[0022] Figure 6 for Figure 2 A perspective view of the exhaust side of the mid rotor.

[0023] In the figure: 1. Intake end cover; 11. Intake hole; 2. Cylinder body; 3. Exhaust end cover; 31. Exhaust hole; 4. Eccentric shaft; 5. Counterweight; 6. Phase gear ring; 7. Phase gear; 8. Rotor; 81. Working side wall; 82. Booster blade; 83. Converging notch; 84. Intake port; 85. Exhaust port; 86. Exhaust channel; 87. Reinforcement rib; 88. Intake flow channel; 9. Rotation bearing; 10. Revolution bearing. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only the best embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] This embodiment provides an elliptical rotor engine with a self-supercharging structure, such as Figure 1-Figure 3 As shown, the rotary engine includes an intake end cover 1, a cylinder body 2, an eccentric shaft 4, a counterweight 5, a phase gear ring 6, a phase gear 7, a self-rotation bearing 9, a revolving bearing 10, an exhaust end cover 3 and a rotor 8. The structure and composition of the rotor 8 engine refer to the known technology; the rotor 8 has self-rotation and revolving motion under the meshing transmission of the phase gear 7 and the phase gear ring 6, and the self-rotation angular velocity is greater than the revolving angular velocity. Therefore, compared with the technical route of realizing intake supercharging by synchronously rotating the impeller with the eccentric shaft 4 in the prior art, the effect of self-supercharging by self-rotation of the rotor 8 is better;

[0026] like Figure 4-Figure 6 As shown, the rotor 8 includes an integrally formed working side wall 81 and a connecting boss. The working side wall 81 is a nearly elliptical structure formed by connecting and closing double arc epicycloids. The connecting boss is arranged on the rotation center of the rotor 8. The phase gear 7 is installed on the central axis hole of the connecting boss. The working side wall 81 and the connecting boss are connected by an integrally formed partition. At the same time, the interior of the rotor 8 is divided into an intake area located on the intake side of the partition and an exhaust area on the exhaust side.

[0027] The intake end cover 1 and the exhaust end cover 3 are respectively sealed and connected to the two end surfaces of the working side wall 81. The intake area is composed of the space between the intake end cover 1 and the partition. The booster blades 82 are arranged in the intake area. The exhaust area is composed of the space between the exhaust end cover 3 and the partition. Several triangular structure intake holes 11 are distributed in an annular manner on the intake end cover 1. The intake holes 11 are directly opposite to the area where the booster blades 82 are involved. The outer edge of the working side wall 81 is provided with an intake port 84 and an exhaust port 85 connected to the combustion chamber of the cylinder body 2. The setting positions and diameter widths of the intake port 84 and the exhaust port 85 correspond to the valve timing phase position and valve timing angle of the intake stroke and the exhaust stroke respectively. The intake port 84 is connected to the intake area, and the exhaust port 85 is connected to the exhaust area.

[0028] The two ends of the connecting boss are higher than the plane of the partition, and its end face should be lower than the end face of the working side wall 81. In order to improve the structural strength of the rotor 8, the boost blade 82 also serves as a reinforcing fin, and its blade root is fixedly connected to the circumferential surface of the connecting boss, or is an integrally formed structure, and its blade lower end face is fixedly connected to the partition or integrally formed to form a connection, and the blade end is fixedly connected to the inner side of the working side wall 81 or is an integrally connected structure. Therefore, the length of the boost blade 82 is different, and it is adapted to the spacing between the circumferential surface of the connecting boss and the inner side of the working side wall 81. The number of boost blades 82 is not less than 9 to ensure the boost effect. Several boost blades 82 are arranged at equal angles around the rotation center of the rotor 8, and a gradually expanding channel is formed between two adjacent boost blades 82. The airflow in the gradually expanding channel forms a centrifugal boost intake with high-speed rotation. In order to form a gradually expanding channel connecting each The confluence channel of the channel is formed by cutting off the lower corner of the fan blade end side along the plane of the partition and the inner side of the working side wall 81 to form a confluence notch 83. The confluence notch 83, the inner side of the partition and the working side wall 81 are constructed to form a circle of confluence channels that sequentially connect each gradually expanding channel and are closed. The confluence notch 83 is the cross-section of the confluence channel. The air inlet 84 is connected to the confluence channel and is located on the outer side of the confluence channel. The upper edge of the confluence notch 83 should be flush with or higher than the upper edge line of the air inlet 84. The airflow is retracted through the boost blades 82 in front of the air inlet 84. The boost blades 82 generate centrifugal force as the rotor 8 rotates at high speed. The centrifugal force quickly pushes the airflow to the confluence channel outside the boost blades 82, forming a strong airflow. The airflows in multiple gradually expanding channels converge in the confluence channel at the wall of the rotor 8, and finally flow into the combustion chamber from the air inlet 84, thereby realizing the pressurization of the intake system.

[0029] The structural design of the booster blade 82 refers to the centrifugal impeller blade structure. The blade is tilted to increase the airflow contact area and guide the rolled airflow to the inside. The angle between the blade plane and the axial generatrix, that is, the tilt angle θ, is 30°-75° to ensure the air intake effect. In addition, the blade end should be twisted appropriately to reduce the blocking effect of the baffle plane on the airflow.

[0030] In this embodiment, in order to further increase the intake flow rate, the area near the air inlet 84 on the partition is sunken to form an intake flow channel 88 that is connected to the air inlet 84. The width of the intake flow channel 88 is not less than the width of the air inlet 84, and the lower edge of the air inlet 84 is located at the bottom of the intake flow channel 88, thereby increasing the height of the air inlet 84, thereby increasing the intake cross-sectional area. At the same time, the sunken structure is used as a reinforcement structure of the rotor 8. The intake flow channel 88 forms a bulge on the exhaust side of the partition, and extends from the inner side edge of the working side wall 81 to the outer peripheral surface of the connecting boss.

[0031] In addition, in order to improve the exhaust gas emission efficiency in the exhaust area, the area near the exhaust port 85 on the partition is protruded into the exhaust area to form a collection barrier, and an exhaust channel 86 is set in the collection barrier. The exhaust channel 86 is connected to the exhaust hole 31 for exhaust. Three exhaust holes 31 are set, which correspond to the exhaust stroke phases of the three combustion chambers respectively; the idle area of ​​the exhaust area is set with several reinforcing ribs 87 connected to the inner edge of the working side wall 81 and the outer peripheral surface of the boss, and the several reinforcing ribs 87 should be distributed and arranged according to the dynamic balance.

[0032] The directional words such as "upper", "lower", "side", "end", "bottom", "front", "back" mentioned in this article are references to Figure 1-Figure 6 The orientation or position relationship or airflow direction shown in the corresponding drawings is described. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation;

[0033] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the terms "on" and "inside" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elliptical rotor engine with a self-supercharging structure, comprising an intake end cover, a cylinder body, an exhaust end cover and a rotor, wherein the rotor comprises an integrally formed working side wall and a connecting boss, wherein the working side wall is formed by connecting and closing a double-arc epitrochoid to form a nearly elliptical structure, and the connecting boss is coaxially arranged on the rotation center of the rotor, characterized in that: A partition is integrally formed between the working side wall and the connecting boss to form an intake area and an exhaust area located on both sides of the partition and isolated from each other inside the rotor, the intake area is connected to the intake hole on the intake end cover, the exhaust area is connected to the exhaust hole on the exhaust end cover, and an intake port and an exhaust port connected to the cylinder combustion chamber are arranged on the outer edge surface of the working side wall at corresponding stroke phase positions, the intake port is connected to the intake area, and the exhaust port is connected to the exhaust area; The connecting boss is higher than the plane of the partition, and a number of boost blades are arranged in the air intake area for synchronous rotation to achieve airflow suction and centrifugal supercharging. The roots of a number of the boost blades are connected to the circumferential surface of the connecting boss and are arranged at equal angles around the rotation center of the rotor to form a gradually expanding channel extending from the circumference of the connecting boss to the inner edge of the working side wall between each of the boost blades. A circle of converging channels is arranged along the inner edge of the working side wall in the air intake area, and the converging channels connect each of the gradually expanding channels, and the converging channels are connected to the combustion chamber through the air intake port.

2. The elliptical rotor engine with a self-supercharging structure according to claim 1, characterized in that: The booster blade is integrally formed with the rotor, the lower end surface thereof is integrally connected to the partition plate, and the blade tip is integrally connected to the inner side edge surface of the working side wall.

3. The elliptical rotor engine with a self-supercharging structure according to claim 2, characterized in that: A confluence notch is formed by cutting off the lower side corner of the blade end of the boost blade to connect the adjacent gradually expanding channels. The confluence channel is formed by a plurality of the confluence notches, the partition plate and the inner side edge of the working side wall.

4. The elliptical rotor engine with a self-supercharging structure according to claim 3, characterized in that: The upper edge of the air inlet is flush with or lower than the upper edge of the converging notch.

5. The elliptical rotor engine with a self-supercharging structure according to claim 4, characterized in that: The area on the air intake side of the partition close to the air intake port is sunken to form an intake flow channel connected to the air intake port, and a protrusion is formed on the exhaust side of the partition, the intake flow channel extends from the inner edge of the working side wall to the outer peripheral surface of the connecting boss, and the lower edge of the air intake port is located at the bottom of the intake flow channel.

6. The elliptical rotor engine with a self-supercharging structure according to claim 1, characterized in that: The area on the partition close to the exhaust port protrudes into the exhaust zone to form a collection block, and the collection block area is sunken to set an exhaust channel, and the exhaust channel is connected to the exhaust hole for exhaust. The exhaust zone is protruded with a plurality of reinforcing ribs distributed according to dynamic balance, and the two ends of the reinforcing ribs are respectively connected to the inner edge of the working side wall and the outer peripheral surface of the connecting boss.

7. The elliptical rotor engine with a self-supercharging structure according to claim 3, characterized in that: The number of the booster blades is no less than 9.

8. The elliptical rotor engine with a self-supercharging structure according to claim 1, characterized in that: The booster blades are arranged tilted, and the angle between the blade plane and the axial generatrix of the connecting boss is 30°-75°.

Images