Rotor-stator assemblies for rotary engines, compressors, or pumps, rotary engines, and lifting units and lifting devices.

Abstract

It provides a simpler, lighter, and more balanced rotor-stator assembly. [Solution] A rotor-stator assembly comprising rotors 3 and 4 that rotate eccentrically within stator chambers 1 and 2, wherein the geometric shape of the rotors 3 and 4 is configured to provide a first fluid seal in the area of ​​maximum proximity between the outer circumferential surface of the rotors 3 and 4 and the inner circumferential wall of the stator chambers 1 and 2, thereby providing a second fluid seal by a component that rotates with the rotor, one end of which is permanently connected to the inner surface of the stator chambers 1 and 2 by a bearing and slides along the inner surface of the stator chambers 1 and 2, and the other end of which is radially movable within a receptacle of the rotors 3 and 4, and the first and second fluid seals define the first chamber portion and the second chamber portion of the stator chambers 1 and 2.

Description

Technical Field

[0001] The present invention relates to the field of rotary piston devices for rotary engines, compressors, or pumps. In particular, the present invention relates to a rotor-stator assembly for a rotary engine, compressor, or pump, and a rotary engine comprising two rotor-stator assemblies according to the present invention. Further, the present invention relates to a lifting unit and a lifting device comprising a rotor-stator assembly according to the present invention.

Background Art

[0002] Rotary engines are well-known and have been developed in various configurations, the most famous of which is the Wankel engine. Common to all rotary engines is the provision of two or more variable volume chambers formed between a rotor and the walls of a stator chamber within which the rotor rotates. The volume of each chamber changes as the rotor rotates within the stator. The Wankel configuration defines three chambers which are isolated from each other by the contact between the three apexes of a triangular rotor and an oval chamber wall. All stages of the four-stroke engine cycle are implemented by the three variable volume chambers. The disadvantages of the Wankel rotor configuration are its complex eccentric rotor bearings and the continuous lateral displacement of the rotor mass, which consumes energy and promotes wear and vibration. Other rotary piston devices have been proposed with the aim of providing a rotary engine with a simpler and more balanced rotor structure and improved performance. Prior Art

[0003] U.S. Patent No. 4,638,776 describes a twin-rotor engine having two cooperating rotors positioned adjacent to each other and communicating via a connecting channel. The first eccentric rotor rotates in a first (compression) chamber to draw in a fuel / air mixture during the first part of the cycle (intake), and then compresses the mixture during the second part of the cycle (compression). The compressed mixture is then discharged through the connecting channel into a second (combustion) rotor chamber, where it is detonated during the third part of the cycle (output), and then discharged through an exhaust port during the fourth part of the cycle (exhaust). The rotor according to U.S. Patent No. 4,638,776 is provided with radial vanes with low-friction seals between the rotor and the stator (chamber). These vanes are configured to move radially outward and inward from the rotor in sync with the eccentric movement of the rotor, maintaining a small but constant gap distance between the vane tips and the inner circumferential wall of the chamber.

[0004] These vanes are extended and retracted by pins that engage with circular slots in the side walls of the chamber. This vane drive mechanism is prone to wear and difficult to access for adjustment and repair. Furthermore, the vanes and drive mechanism embody eccentric, radially movable masses and exert radial forces on the rotor; these forces are difficult to compensate for and contribute to rotor imbalance.

[0005] International Publication No. 2018 / 146333 discloses a rotor-stator assembly for a rotary engine, compressor, or pump, comprising a rotor configured to rotate eccentrically within a stator chamber; a radially movable first vane for providing a first fluid seal between the outer surface of the rotor and the inner wall of the stator chamber, and a second fluid seal in the area of ​​maximum proximity between the outer surface of the rotor and the inner wall of the stator chamber, so that the first and second fluid seals define at least a first chamber portion and a second chamber portion of the stator chamber; and a vane actuator configured to move the first vane radially inward and outward such that the radial movement of the first vane follows the eccentric rotational movement of the outer surface of the first rotor, thereby causing the first vane to be substantially rotationally stationary relative to the stator chamber. According to International Publication No. 2018 / 146333, the vane actuator is configured to support the vane with a first vane seal gap between the first vane and the outer surface of the rotor. The inclusion of the vane actuator results in a complex structure for the rotor-stator assembly. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] U.S. Patent No. 4638776 [Patent Document 2] International Publication No. 2018 / 146333 brochure [Overview of the Initiative]

[0007] Brief description of the invention The present invention aims to overcome at least some of the drawbacks of prior art engines, such as the engine described above. To this end, the present invention provides a rotor-stator assembly for a rotary engine as described in claim 1. Further embodiments of the present invention are described in dependent claims. As a result, a simpler, lighter, and better-balanced rotor-stator assembly is presented compared to prior art assemblies. In addition, it also allows for easier access for maintenance, adjustment, and repair of the assembly. Furthermore, the present invention aims to provide a lifting unit and lifting device based on a rotor-stator assembly as presented herein.

[0008] According to the present invention, a rotor-stator assembly for a rotary engine, compressor, or pump comprises a rotor configured to rotate eccentrically within a stator chamber, wherein the geometric shape of the rotor is configured to provide a first fluid seal in the area of ​​maximum proximity between the outer surface of the rotor and the inner wall of the stator chamber, thereby providing a second fluid seal by a component that rotates with the rotor, one end of which is permanently connected to the inner surface of the stator chamber by a bearing and slides along the inner surface of the stator chamber, and the other end of which is radially movable within a receptacle of the rotor, and the first and second fluid seals define a first chamber portion and a second chamber portion of the stator chamber. For example, the component may have both sides connected to a single vertical annular portion when viewed axially, the annular portion being configured to rotate by ball bearings inside either of the stator chambers.

[0009] When both sides of an annular section, viewed from the axial direction, are connected to a single vertical annular section, air and gas leakage can be controlled by a sealing ring positioned in a groove on the outer diameter of the annular section, and the annular section is configured to rotate on a ball bearing inside one of the stator chambers.

[0010] The components can also be slidably connected to at least two ball bearing rims provided on the inner surface of the stator chamber, thereby positioning the seal lip at the end of the component facing the inner surface of the stator chamber.

[0011] Furthermore, to optimize the seal, small rectangular bars with springs can be placed at the ends of components facing the inner surface of the stator chamber. Additionally, rotating flat portions can prevent air and gas leakage by creating light contact between them. Moreover, during rotation, when the outer diameter of the rotor irregularly exceeds the inner diameter of the stator chamber by 1.5 mm, air and gas leakage can be prevented by the formation of an arch between their diameters.

[0012] Within the framework of this application, a rotor engine is proposed comprising: a first rotor-stator assembly according to the present invention, configured such that its first chamber portion is for performing the intake portion of a four-stroke engine cycle and its second chamber portion is for performing the compression portion of a four-stroke engine cycle; and a second rotor-stator assembly according to the present invention, configured such that its first chamber portion is for performing the detonation portion of a four-stroke engine cycle and its second chamber portion is for performing the exhaust portion of a four-stroke engine cycle.

[0013] The rotor engine also includes a connecting fluid channel for transporting compressed air from a second chamber of a first rotor-stator assembly to a first chamber of a second rotor-stator assembly, and a rotary disc valve for opening or closing the connecting fluid channel at a predetermined part of the engine cycle, wherein the disc valves and rotors of the first and second rotor-stator assemblies are mounted on a common main shaft. Sufficient space is provided around both stator chambers to allow for engine cooling.

[0014] The lifting device according to the present invention comprises a lifting unit in a form corresponding to the rotor engine configuration presented herein, with the difference that the first rotor-stator assembly and the second rotor-stator assembly are of different dimensions, the lifting unit is preferably driven by the rotor engine according to the present invention, and the lifting unit and the rotor engine rotate together by a common shaft.

[0015] Accordingly, the lifting unit comprises first and second rotor-stator assemblies according to the present invention, the rotors of which are mounted on a common main shaft and rotate eccentrically within stator chambers, thereby the stator chambers of the first and second rotor-stator assemblies are coaxial with each other and connected to fluidly communicate by a connecting fluid channel constructed by openings in each of the two stator chambers, the connecting fluid channel being opened and closed by an opening in a valve disc located between the first and second rotor-stator assemblies and rotating with the main shaft. The airflow is reversed compared to a rotor engine, thereby causing air to flow from the second rotor-stator assembly to the first rotor-stator assembly, and the stator chamber of the second rotor-stator assembly has a larger volume than the stator chamber of the first rotor-stator assembly. According to other embodiments, the lifting unit can be driven by other types of engines, for example, by an electric motor.

[0016] The second rotor-stator assembly of the lifting unit is driven by an engine, preferably a rotor engine according to the present invention, and is used for intake of air into its first chamber section from an air inlet and for compressing this amount of air. The compressed air is transferred from its second chamber section to the first chamber section of the first rotor-stator assembly via a connecting fluid channel and a rotary disc valve when the openings coincide while the lifting device is in motion. The air is then pushed out of the second chamber section of the first rotor-stator assembly by a rotating rotor at a suitable rotational speed of, for example, 50 revolutions per second or more, through an outlet preferably of 5 atmospheres or more, depending on the configuration of the device.

[0017] The lifting unit operates to power a four-stroke rotor engine, thereby reversing the airflow compared to the rotor engine disclosed herein. The lifting device for the weight may comprise, for example, four lifting devices according to the present invention, arranged at each corner of a rectangle. According to further developments of the present invention, if more such lifting devices are arranged on both sides of a rectangular shape, such a structure can fly. [Brief explanation of the drawing]

[0018] The present invention will be described in detail with reference to the attached drawings. [Figure 1] A cross-sectional view of an example of a rotor engine according to the present invention, comprising two rotor-stator assemblies according to the present invention, is shown. [Figure 2] A first rotor-stator assembly according to Figure 1 is shown in cross-section in plan BB shown in Figure 1, configured such that at the start of one revolution of the rotor engine, and therefore at the start of the compression process, its first chamber is for performing the intake portion of the four-stroke engine cycle and its second chamber is for performing the compression portion of the four-stroke engine cycle of the rotor engine. [Figure 3]The first rotor-stator assembly according to FIG. 2 is shown in cross section in the plane B-B shown in FIG. 1 at the stage where the compression in the second chamber of the rotating first rotor-stator assembly has reached the maximum predetermined value. [Figure 4] The rotor engine according to FIG. 1 is shown in cross section in the plane C-C shown in FIG. 1. [Figure 5] The second rotor-stator assembly according to FIG. 1, in which the first chamber of the second rotor-stator assembly is configured to perform the detonation part of the four-stroke engine cycle and the second chamber is configured to perform the exhaust part of the four-stroke engine cycle at the stage where the compressed fuel-air mixture in the first chamber is detonated, is shown in cross section in the plane D-D shown in FIG. 1. <于 [Figure 6] The second rotor-stator assembly according to FIG. 5 at the stage after detonation is shown in cross section in the plane D-D shown in FIG. 1. [Figure 7] The second rotor-stator assembly according to FIG. 5 at another stage after detonation is shown in cross section in the plane D-D shown in FIG. 1. [Figure 8] An example of the lifting unit according to the present invention, which includes two rotor-stator assemblies of different dimensions according to the present invention, is shown in cross section. [Figure 9] A figure showing in cross section in the plane F-F shown in FIG. 8 a second rotor-stator assembly according to FIG. 8, which is configured such that at the start of one rotation of the lifting unit, and thus at the start of the compression process, the first chamber is for performing the air intake process and the second chamber is for performing the air compression process, and is driven by a rotor engine not shown. [Figure 10] The second rotor-stator assembly according to FIG. 8 at the stage where the compression in the second chamber of the rotating second rotor-stator assembly has reached the maximum predetermined value is shown in cross section in the plane F-F shown in FIG. 8. [Figure 11]The lifting unit according to FIG. 8 is shown in cross-section in the plane G-G shown in FIG. 8. [Figure 12] The first rotor-stator assembly according to FIG. 8, in which the first chamber part is configured to perform the intake process of compressed air from the second rotor-stator assembly and the second chamber part is configured to perform the exhaust part of air at high pressure when compressed air is pushed out from the lifting unit, is shown in cross-section in the plane H-H shown in FIG. 8. [Figure 13] The first rotor-stator assembly according to FIG. 8, when the compressed air from the second rotor-stator assembly is transferred to the first chamber part, is shown in cross-section in the plane H-H shown in FIG. 8. [Figure 14] A lifting device provided with a lifting unit driven by a rotor engine according to the present invention, in which the lifting unit and the rotor engine rotate integrally by a common shaft, is shown in cross-section.

Mode for Carrying Out the Invention

[0019] The drawings are provided as mere examples and are intended to assist in understanding the principles underlying the present invention and should not be construed as limiting the scope of protection sought. When the same reference numerals are used in different figures, these are intended to indicate similar or equivalent features. However, the use of different reference numerals should not be assumed to indicate any particular degree of difference between the features to which they refer. For the sake of clarity and readability of the figures, not all reference numerals are included in all the drawings.

[0020] Referring to Figures 1 and 4, the rotor engine according to the present invention comprises first and second rotor-stator assemblies, the rotors 4 and 3 mounted on a common main shaft 5 and arranged to rotate eccentrically within stator chambers 2 and 1, respectively, so that the stator chambers 2 and 1 are coaxial with each other and connected to fluid communication by a connecting fluid channel constructed by two respective openings 11 and 12 of the stator chambers 1 and 2, the connecting fluid channel being opened and closed by an opening 8 of a valve disc 7 located between the two assemblies and arranged to rotate with the main shaft 5. Roller bearings 6 necessary for the operation of the engine are located inside the four stator chambers 1 and 2, so that an eccentric rotation guide 16 is used to guide the volume separator during rotation. In the following description, the first rotor-stator assembly comprises a rotor 4 and a stator chamber 2, and the second rotor-stator assembly comprises a rotor 3 and a stator chamber 1.

[0021] According to the present invention, referring to Figures 1 and 2, the rotors 3 and 4 are configured to provide a first fluid seal in the area of ​​maximum proximity between the outer circumferential surface of the rotors 3 and 4 and the inner circumferential walls of the respective stator chambers 1 and 2, thereby providing a second fluid seal by a component 15 that rotates with each rotor 3 and 4, one end of which is permanently connected to the inner surface of each stator chamber 1 and 2, preferably by a bearing, and slides along the inner surface of the stator chamber, the other end of which is radially movable within the receptacle of each rotor 3 and 4, and the first and second fluid seals define the first and second chamber portions of each stator chamber 1 and 2. Preferably, the component 15 can be connected from both sides in an axial view to a single vertical annular portion, the annular portion being configured to rotate by ball bearings inside either of the respective stator chambers 1 and 2. In this embodiment, during 360 rotations of the rotor, the volumes of the two chambers of the rotor-stator assembly reach the same maximum and minimum values, respectively.

[0022] Rotors 3 and 4 are preferably shaped so that their centers of gravity coincide with the axis of the main shaft. This can be achieved, for example, by machining one or more hollow regions within the rotor.

[0023] According to the present invention, a first rotor-stator assembly is configured such that its first chamber is for performing the intake portion of a four-stroke engine cycle, and its second chamber is for performing the compression portion of a four-stroke engine cycle. Furthermore, a second rotor-stator assembly according to the present invention is configured such that its first chamber is for performing the detonation portion of a four-stroke engine cycle, and its second chamber is for performing the exhaust portion of a four-stroke engine cycle. The system according to the present invention creates four alternating volumes simultaneously, thereby effectively enabling the application of four cycles in one revolution.

[0024] To achieve operation of a four-stroke engine cycle, the volumes of the first and second chambers of the second rotor-stator assembly are reversed relative to their corresponding first and second chambers of the first rotor-stator assembly. According to the present invention, the rotor of the second rotor-stator assembly, and therefore its component 15, precedes the rotor of the first rotor-stator assembly, and therefore its component 15, by an offset angle of approximately 90°, thereby opening the connecting fluid channel between the first stator chamber and the second stator chamber when the compression of the second chamber of the first rotor-stator assembly reaches its maximum value. The operating modes of the rotor engine according to the present invention will be described below with reference to Figures 2, 3, 4, 5, 6, and 7.

[0025] Figure 2 shows the first rotor-stator assembly of the rotor engine at the start of one revolution of the rotor engine, and therefore at the start of the compression process. The first chamber of the first rotor-stator assembly, which functions as an intake volume, has a minimal volume, and thereafter, as the rotor 4 rotates in the direction of the arrow, the increasing volume of the first chamber draws in air through the intake channel 9 provided in the stator chamber 2. At the same time, the air drawn in during the previous rotation is compressed in the second chamber of the first rotor-stator assembly by the rotation of the rotor 4 and components 15.

[0026] Figure 3 shows the first rotor-stator assembly according to Figure 2 at a stage when the compression in the second chamber 10 of the first rotor-stator assembly has reached a predetermined maximum value, for example, 7 or 8 atmospheres, and this air is ready to be transferred to the second rotor-stator assembly for detonation.

[0027] When the volume of the second chamber of the first rotor-stator assembly reaches a predetermined minimum value and therefore a predetermined maximum compression, for example, 7 or 8 atmospheres, the connecting fluid channel constructed by the two respective openings 11, 12 of the rotor-stator assembly is opened by the valve disc 7. Referring to Figure 4, this means that the opening 8 of the valve disc 7 coincides with the connecting fluid channel, thereby allowing compressed air to enter the first chamber of the second rotor-stator assembly, which functions as a combustion chamber, through the connecting fluid channel, and then, as the connecting fluid channel is closed by the valve disc 7 due to its rotation, the fuel is sprayed or atomized into the airflow by at least one nozzle 29 shown in Figure 5.

[0028] Referring to Figures 6 and 7, when the combustion chamber reaches a predetermined volume due to the rotation of the rotor 3, the compressed fuel-air mixture in the first chamber section 13 of the second rotor-stator assembly is detonated by an ignition spark or other suitable means 30, thereby providing driving force to the rotor 3 of the second rotor-stator assembly and, consequently, to the common main shaft 5. Meanwhile, the second chamber section of the second rotor-stator assembly contains the exhaust gas from the previous detonation, which is discharged through the exhaust channel 14 as the volume of the second chamber section decreases. Therefore, after the rotor has fully rotated, the four-stroke engine cycle is complete.

[0029] Figure 8 is a cross-sectional view of an example of a lifting unit according to the present invention, comprising two rotor-stator assemblies of different dimensions according to the present invention. The configuration of the lifting unit, as can be seen from Figure 8, corresponds to the configuration of the rotor engine presented herein, but with the differences that the first and second rotor-stator assemblies are of different dimensions, the airflow is reversed compared to the rotor engine, resulting in air flowing from the second rotor-stator assembly to the first rotor-stator assembly, the second rotor-stator assembly and this lifting unit are driven by an engine, preferably the rotor engine according to the present invention, the lifting unit and the rotor engine rotate together by a common shaft, and the stator chamber of the second rotor-stator assembly has a larger volume than the stator chamber of the first rotor-stator assembly. Since the components of the rotor engine are disclosed and described within the framework of this specification, only the differences between the rotor engine and the lifting unit will be described below.

[0030] A larger second rotor-stator assembly of the lifting unit is preferably driven by a rotor engine according to the present invention and is used for intake from an air inlet and for compressing this amount of air, which is then transferred to a smaller first rotor-stator assembly via a connecting fluid channel and a rotary disc valve when the openings coincide while the lifting device is in motion. The air is then pushed out of the smaller rotor-stator assembly by a rotating rotor at a suitable rotational speed of, for example, 50 Rev / second or more through an outlet at an atmospheric pressure of 5 atmospheres or more, depending on the configuration of the lifting unit.

[0031] A second rotor-stator assembly, comprising a stator and a rotor, is used for intake from an air inlet 9 shown in Figures 9 and 10, and for compressing this amount of air simultaneously. The compressed air is transferred to a smaller first rotor-stator assembly via a connecting fluid channel constructed by two respective openings 11, 12 of stator chambers 1, 2, which are opened by a valve disc 7. Referring to Figure 11, this means that the opening 8 of the valve disc 7 coincides with the connecting fluid channel, thereby allowing the compressed air to flow through the connecting fluid channel into the first chamber portion of the first rotor-stator assembly.

[0032] Subsequently, during the operation of the rotor of the first rotor-stator assembly, air is pushed out by the rotating rotor at a rate of 50 Rev / second or more through the outlet 14 shown in Figures 12 and 13, at, for example, 5 atmospheres, depending on the dimensions of the components of the lifting unit.

[0033] An example of a lifting device equipped with a lifting unit is shown in Figure 14. As can be seen from this figure, the lifting device includes a lifting unit driven by a rotor engine according to the present invention, and the lifting unit and rotor engine rotate together on a common shaft. When the lifting device is attached to a weight with the air outlet facing downwards, the air is pushed downwards, allowing the weight to be lifted.

[0034] According to another embodiment for obtaining greater lifting force, the lifting unit may comprise three rotor-stator assemblies instead of two, arranged in the order of first, second, and third assemblies, the first and third assemblies configured to draw in and compress air, the second assembly having a smaller volume than the first and third assemblies and configured to further compress and blow out the air flowing from the first and third assemblies, valve discs located between the first and second rotor-stator assemblies and between the second and third rotor-stator assemblies, as disclosed herein, all rotor-stator assemblies rotate together by a common shaft, preferably driven by a rotor engine as described. As a result, a more pressurized amount of air is continuously blown out from the air outlet of the second assembly at a very high speed, capable of lifting a very heavy weight.

Claims

1. A rotor-stator assembly for a rotary engine, compressor, or pump, The system includes rotors (3, 4) that rotate eccentrically within stator chambers (1, 2), The geometric shape of the rotors (3, 4) is configured to provide a first fluid seal in the area of ​​maximum proximity between the outer circumferential surface of the rotors (3, 4) and the inner circumferential wall of the stator chambers (1, 2). As a result, the second fluid seal is provided by the component (15) that rotates with the rotor, One end of the aforementioned component is permanently connected to the inner surface of the stator chamber (1, 2) by a bearing and slides along the inner surface of the stator chamber (1, 2). The other end of the aforementioned component is housed radially movably within the receptacle of the rotor (3, 4), The rotor-stator assembly comprises the first and second fluid seals defining the first and second chamber portions of the stator chambers (1, 2).

2. The rotor-stator assembly according to claim 1, wherein the component (15) is configured such that both sides of it, as viewed from the axial direction, are connected to a single vertical annular portion, and the annular portion is configured to rotate on a ball bearing inside either of the stator chambers (1, 2), or the component (15) is slidably connected to at least two ball bearing rims provided on the inner surface of the stator chamber, and a seal lip is disposed at the end of the component facing the inner surface of the stator chamber.

3. A rotor engine comprising the first and second rotor-stator assemblies according to claim 1 or 2, The rotors (4, 3) are mounted on a common main shaft (5) and are configured to rotate eccentrically within the stator chambers (2, 1). As a result, the stator chambers (2, 1) of the first and second rotor-stator assemblies are coaxial with each other and connected to fluidly communicate by a connecting fluid channel formed by the respective openings (11, 12) of the two stator chambers (1, 2), the connecting fluid channel being opened and closed by an opening (8) in a valve disc (7) located between the first and second rotor-stator assemblies and rotating with the main shaft (5), The first rotor-stator assembly is configured such that its first chamber is for performing the intake portion of the four-stroke engine cycle and its second chamber is for performing the compression portion of the four-stroke engine cycle. The second rotor-stator assembly is configured such that its first chamber is for performing the detonation portion of the four-stroke engine cycle and its second chamber is for performing the exhaust portion of the four-stroke engine cycle. The rotor (3) and its components (15) of the second rotor-stator assembly are offset by approximately 90° compared to the rotor (4) and its components (15) of the first rotor-stator assembly. As a result, the valve disc (7) opens the connecting fluid channel between the first stator chamber and the second stator chamber when the compression in the second chamber of the first rotor-stator assembly reaches its maximum value, in a rotor engine.

4. The rotor engine is configured such that the first chamber portion of the first rotor-stator assembly has a minimum volume at the start of rotation. As a result, when the rotor (4) rotates, the increased volume of the first chamber draws in air through the intake channel (9) provided in the stator chamber (2). Simultaneously, the air drawn in during the previous rotation is compressed in the second chamber of the first rotor-stator assembly by the rotation of the rotor (4) and the components (15), and when the volume of the second chamber of the first rotor-stator assembly reaches a predetermined minimum value and a predetermined maximum compression, the connecting fluid channel, which is formed by the openings (11, 12) of the two rotor-stator assemblies, is opened by the valve disc (7), thereby allowing the compressed air to pass through the connecting fluid channel toward the first chamber (13) of the second rotor-stator assembly, which functions as a combustion chamber, and subsequently, when the connecting fluid channel is closed by the valve disc (7) due to its rotation, fuel is sprayed or atomized into the airflow by at least one nozzle (29). Subsequently, when the combustion chamber reaches a predetermined volume due to the rotation of the rotor (3), the compressed fuel-air mixture in the first chamber of the second rotor-stator assembly is detonated by an ignition spark or other suitable means (30), thereby generating a driving force acting on the rotor (3) and the common main shaft (5) of the second rotor-stator assembly, and the second chamber of the second rotor-stator assembly contains exhaust gases from the previous detonation, which are then discharged through the exhaust channel (14) as the volume of the second chamber decreases, so that the four-stroke engine cycle is completed after the full rotation of the rotor. The rotor engine according to claim 3.

5. A lifting unit comprising the first and second rotor-stator assemblies according to claim 1 or 2, The rotors (4, 3) are mounted on a common main shaft (5) and are configured to rotate eccentrically within the stator chambers (2, 1). As a result, the stator chambers (2, 1) of the first and second rotor-stator assemblies are coaxial with each other and connected to each other by a connecting fluid channel formed by the openings (11, 12) of the two stator chambers (1, 2), The connecting fluid channel is opened and closed by an opening (8) in a valve disc (7) which is located between the first and second rotor-stator assemblies and rotates with the main shaft (5). A lifting unit wherein the stator chamber (1) of the second rotor-stator assembly has a larger volume than the stator chamber (2) of the first rotor-stator assembly, the second rotor-stator assembly is driven by an engine and is configured to draw air into its first chamber from an air inlet and compress this amount of air, the compressed air being transferred from its second chamber to the first chamber of the first rotor-stator assembly via the connecting fluid channel and the rotary disc valve when the openings are aligned, and the compressed air being pushed out of the second chamber of the first rotor-stator assembly when the lifting unit is in motion.

6. A lifting device comprising a lifting unit as described in claim 5, wherein the lifting unit is driven by a rotor engine as described in claim 3 or 4, and the lifting unit and the rotor engine rotate together on a common shaft.

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