An air intake system for a two-rotor engine

Abstract

The application relates to an air intake system suitable for a double-rotor engine and belonging to the technical field of engine air intake systems. The system comprises an air intake manifold assembly, an air intake pressure stabilizing cavity assembly, two reed valve assemblies and a positioning pin structure. The air intake manifold and the pressure stabilizing cavity are provided with one-to-one corresponding two independent air intake channels. The reed valve is arranged between the corresponding channels and is a one-way valve for realizing one-way flow of air from the pressure stabilizing cavity to the air intake manifold. The components are coaxially positioned through the positioning pin structure and are detachably connected through bolts. The air outlet end of the air intake manifold is provided with a flange structure suitable for the double-rotor engine. The application solves the problems of short service life of valve pieces, low air intake efficiency, poor air intake consistency and insufficient assembly reliability of the traditional system, and considers air intake efficiency, working reliability and assembly and maintenance convenience, thereby effectively improving the working stability and service life of the double-rotor engine.

Description

Technical Field

[0001] This invention belongs to the technical field of rotary engine intake systems, specifically an intake system suitable for dual-rotor engines. Background Technology

[0002] The twin-rotor engine relies on the phase difference of two sets of triangular rotors to complete the four-stroke working cycle of intake, compression, power and exhaust. Due to its own structure and working characteristics, its intake process has inherent high-frequency pressure fluctuations, and is accompanied by the risk of high-temperature gas backflow. The two intake paths of the twin-rotor structure are also prone to poor intake uniformity due to the difference in working phase.

[0003] Currently, the reed valve type intake system commonly used in twin-rotor engines typically places the reed valve between the rotor housing and the intake manifold. While this arrangement can achieve basic unidirectional intake control, it has significant shortcomings in practical applications: the reed valve is located close to the high-temperature and high-pressure working chamber of the rotor, and is subjected to long-term high-temperature combustion gas scouring and alternating pressure impact, resulting in a harsh working environment that easily leads to performance degradation and damage, thus limiting its service life; at the same time, this structure is difficult to effectively suppress airflow pressure oscillations during the intake process, and the effect of intake backflow prevention is limited, affecting the engine's charging efficiency and power output stability. In addition, there are problems such as difficulty in ensuring assembly positioning accuracy and inconvenience in later maintenance and repair. Summary of the Invention

[0004] To address the problems existing in the background art, the present invention provides an intake system suitable for a dual-rotor engine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an intake system suitable for a dual-rotor engine, comprising an intake manifold assembly, an intake pressure regulating chamber assembly, a locating pin structure, and two reed valve assemblies;

[0006] The intake pressure regulating chamber assembly has two independent intake channels, and the intake manifold assembly has two independent intake channels. The two intake channels of the intake manifold assembly correspond one-to-one with the two intake channels of the intake pressure regulating chamber assembly. Two reed valve assemblies are respectively located between each corresponding intake channel and intake channel. Each reed valve assembly is a reed-type one-way valve, whose valve plate can only elastically deform and open towards the intake manifold assembly, allowing airflow to flow unidirectionally from the intake pressure regulating chamber assembly to the intake manifold assembly. Each reed valve assembly has its two end faces sealed and fitted to the intake manifold assembly and the intake pressure regulating chamber assembly, respectively. The intake manifold assembly, the two reed valve assemblies and the intake pressure regulating chamber assembly achieve axial coaxial positioning and circumferential anti-misalignment of the corresponding intake channels through a positioning pin structure. The intake manifold assembly, the two reed valve assemblies and the intake pressure regulating chamber assembly are detachably fixed by bolts. The outlet ends of the two intake channels of the intake manifold assembly are equipped with flange structures, which are used to seal and connect one-to-one with the two rotor intake ports of the dual-rotor engine.

[0007] The positioning pin structure includes four positioning pins, all of which are set on the intake end face of the intake manifold assembly. Each reed valve assembly has two positioning pin holes 1, and the intake pressure regulating chamber assembly has two positioning pin holes 2. Each positioning pin is coaxially inserted with the corresponding positioning pin hole 1 and positioning pin hole 2 along the axial direction of the corresponding intake channel, so as to achieve precise alignment of the intake manifold assembly, the two reed valve assemblies and the intake pressure regulating chamber assembly.

[0008] The four positioning pins are long positioning pin one, short positioning pin one, short positioning pin two and long positioning pin two, respectively.

[0009] The long positioning pin one and the short positioning pin one correspond to two positioning pin holes one in one of the reed valve assemblies, and the short positioning pin two and the long positioning pin two correspond to two positioning pin holes one in another reed valve assembly. The axial length of the short positioning pin one and the short positioning pin two matches the depth of the positioning pin hole one in the corresponding reed valve assembly, and they are completely accommodated within the positioning pin hole one in the corresponding reed valve assembly. The ends of the short positioning pin one and the short positioning pin two do not extend beyond the end face of the reed valve assembly facing the intake pressure regulating chamber assembly. Pin 1 and long positioning pin 2 pass through the positioning pin hole 1 of the corresponding reed valve assembly. The ends of long positioning pin 1 and long positioning pin 2 extend to the side of the reed valve assembly facing the intake pressure regulating chamber assembly and are inserted into the corresponding positioning pin hole 2 of the intake pressure regulating chamber assembly. Long positioning pin 1, short positioning pin 1, short positioning pin 2 and long positioning pin 2 are arranged alternately along the arrangement direction of the two intake channels. Two long positioning pins are located at both ends of the four positioning pins, and two short positioning pins are located between the two long positioning pins.

[0010] On the corresponding connecting end faces of the intake manifold assembly, the two reed valve assemblies and the intake pressure regulating chamber assembly, there are multiple sets of bolt mounting holes with overlapping axes. The fastening bolts are inserted into the bolt mounting holes with overlapping axes to lock and fix the three together.

[0011] The outer wall of the intake pressure regulating chamber assembly has two sensor mounting interfaces, which are connected to the two intake channels one by one.

[0012] Both the intake manifold assembly and the intake pressure regulating chamber assembly are integrally injection molded from reinforced nylon material, and the valve plates of each reed valve assembly are made of stainless steel or carbon fiber.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. Effectively improves valve plate reliability and extends service life. By arranging the reed valve assembly between the intake manifold assembly and the intake pressure regulating chamber assembly, the valve plate is kept away from the high temperature and high pressure area of ​​the rotor housing, avoiding direct scouring by high temperature combustion gas and high frequency pressure impact, effectively reducing the thermal load and mechanical fatigue damage of the valve plate; together with the airflow buffering effect of the pressure regulating chamber, it reduces the frequency of abnormal opening and closing of the valve plate, significantly extends the fatigue life of the valve plate, and reduces the risk of valve plate elastic failure and abnormal damage.

[0015] 2. Optimize intake performance and improve engine operating consistency and charge efficiency. Through the structure of dual independent intake channels and two sets of independent reed valves, independent intake control of the dual rotors is achieved, which effectively avoids airflow crosstalk and air snatching problems caused by the intake phase difference between the two rotors, and ensures the uniformity of intake charge and power output consistency of the dual rotors. The one-way conduction structure of the reed valve can effectively block intake backflow, and together with the buffering and attenuation effect of the pressure stabilizing chamber on airflow pulsation and pressure oscillation, it effectively improves the intake charge efficiency and dynamic response performance of the engine under all operating conditions, especially high speed conditions.

[0016] 3. Improve assembly precision and sealing reliability, reduce assembly and maintenance difficulty. The positioning pin structure achieves coaxial positioning and circumferential error prevention for the three core components: intake manifold assembly, reed valve assembly, and intake pressure regulating chamber assembly. This effectively eliminates assembly deviations, ensures precise alignment of the valve plate and intake channel, and avoids valve plate wear, opening and closing jamming, and air leakage from the sealing surface caused by assembly errors. This improves the efficiency and consistency of batch assembly. The three components are connected by detachable bolts, which, combined with the precise positioning of the positioning pins, reduces the difficulty of disassembly and assembly in later maintenance and ensures the accuracy of repeated assembly.

[0017] 4. Improve system operational stability and operating condition adaptability. The intake pressure regulating chamber assembly is equipped with dual independent sensor mounting interfaces, which can realize redundant monitoring of intake pressure and temperature parameters, effectively avoiding abnormal control of the engine electronic control system caused by the failure of a single sensor, and improving the reliability of intake parameter detection and engine operation stability. The material selection of core components takes into account structural strength, lightweight and operating condition adaptability, which can effectively block engine heat transfer, reduce intake temperature and increase charge density, while adapting to the high-frequency opening and closing requirements of valve plates at high engine speed, thus improving the system's adaptability to all operating conditions.

[0018] In summary, this invention addresses the core problems of traditional twin-rotor engine intake systems, such as short valve life, low intake volume efficiency, poor intake consistency between the two rotors, and insufficient assembly reliability. Through structural improvements such as optimized reed valve placement, dual-path independent intake control, and high-precision positioning assembly, it effectively balances intake efficiency, operational reliability, and ease of assembly and maintenance without increasing system complexity. It can stably adapt to the operating characteristics of twin-rotor engines, effectively improving the overall stability and service life of the engine. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the intake manifold assembly structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the reed valve assembly structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the intake pressure regulating chamber assembly of the present invention. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] This embodiment describes an intake system suitable for a dual-rotor engine, including an intake manifold assembly 1, an intake pressure regulating chamber assembly 3, a locating pin structure, and two reed valve assemblies 2;

[0025] The intake pressure regulating chamber assembly 3 has two independent intake channels, and the intake manifold assembly 1 has two independent intake channels. The two intake channels of the intake manifold assembly 1 correspond one-to-one with the two intake channels of the intake pressure regulating chamber assembly 3. Two reed valve assemblies 2 are respectively located between each corresponding intake channel and intake channel. Each reed valve assembly 2 is a reed-type one-way valve, whose valve plate can only be elastically deformed and opened on one side of the intake manifold assembly 1, realizing unidirectional airflow from the intake pressure regulating chamber assembly 3 to the intake manifold assembly 1. The two end faces of the reed valve assembly 2 are respectively sealed and fitted with the intake manifold assembly 1 and the intake pressure regulating chamber assembly 3. The intake manifold assembly 1, the two reed valve assemblies 2 and the intake pressure regulating chamber assembly 3 achieve axial coaxial positioning and circumferential anti-misalignment of the corresponding intake channels through the positioning pin structure. The intake manifold assembly 1, the two reed valve assemblies 2 and the intake pressure regulating chamber assembly 3 are detachably fixedly connected by bolts. The outlet ends of the two intake channels of the intake manifold assembly 1 are provided with flange structures. The flange structures are used to seal and connect one-to-one with the two rotor intake ports of the dual rotor engine.

[0026] The positioning pin structure includes four positioning pins, all of which are set on the intake end face of the intake manifold assembly 1. Each reed valve assembly 2 has two positioning pin holes 1, and the intake pressure regulating chamber assembly 3 has two positioning pin holes 2. Each positioning pin is coaxially inserted with the corresponding positioning pin hole 1 and positioning pin hole 2 along the axial direction of the corresponding intake channel, so as to achieve precise alignment of the intake manifold assembly 1, the two reed valve assemblies 2 and the intake pressure regulating chamber assembly 3.

[0027] The four positioning pins are long positioning pin 1-1, short positioning pin 1-2, short positioning pin 2-3 and long positioning pin 2-4, respectively.

[0028] The long positioning pin 1-1 and the short positioning pin 1-2 correspond to the two positioning pin holes 1 of one of the reed valve assemblies 2, and the short positioning pin 1-3 and the long positioning pin 1-4 correspond to the two positioning pin holes 1 of the other reed valve assembly 2. The axial length of the short positioning pin 1-2 and the short positioning pin 1-3 matches the depth of the positioning pin holes 1 of the corresponding reed valve assembly 2, and is completely accommodated within the positioning pin holes 1 of the corresponding reed valve assembly 2. The ends of the short positioning pin 1-2 and the short positioning pin 1-3 do not extend beyond the end face of the reed valve assembly 2 facing the intake pressure regulating chamber assembly 3. Positioning pin 1-1 and long positioning pin 2-4 pass through the corresponding positioning pin hole 1 of the reed valve assembly 2. The ends of long positioning pin 1-1 and long positioning pin 2-4 extend to the side of the reed valve assembly 2 facing the intake pressure regulating chamber assembly 3 and are inserted into the corresponding positioning pin hole 2 of the intake pressure regulating chamber assembly 3. Long positioning pin 1-1, short positioning pin 1-2, short positioning pin 2-3 and long positioning pin 2-4 are arranged alternately along the arrangement direction of the two intake channels. Two long positioning pins are located at both ends of the four positioning pins, and two short positioning pins are located between the two long positioning pins.

[0029] On the corresponding connecting end faces of the intake manifold assembly 1, the two reed valve assemblies 2, and the intake pressure regulating chamber assembly 3, there are multiple sets of bolt mounting holes with overlapping axes. The fastening bolts are inserted into the bolt mounting holes with overlapping axes to lock and fix the three together.

[0030] The outer wall of the intake pressure regulating cavity assembly 3 has two sensor mounting interfaces, which are connected to the two intake channels one by one.

[0031] Both the intake manifold assembly 1 and the intake pressure regulating chamber assembly 3 are integrally injection molded from reinforced nylon material, and the valve plates of each reed valve assembly 2 are made of stainless steel or carbon fiber.

[0032] This system synchronizes intake control according to the four-stroke cycle of the dual-rotor engine. During engine operation, the two triangular rotors sequentially enter the intake stroke according to a preset phase difference. The negative pressure formed in the corresponding chambers during rotor rotation is transmitted through the rotor intake port to the corresponding intake channel two of the intake manifold assembly 1, providing the core driving force for fresh air flow. Outside fresh air first enters the intake pressure regulating chamber assembly 3, utilizing the volume effect of the chamber to buffer and attenuate upstream intake airflow pulsations and pressure fluctuations, eliminating high-frequency oscillations in the intake airflow. This provides a stable and uniform intake pressure environment for the two sets of reed valve assemblies 2, preventing frequent abnormal opening and closing of the valves caused by airflow fluctuations. Simultaneously, it ensures the intake pressure balance of the two intake channels one within the intake pressure regulating chamber assembly 3. When the intake pressure in the corresponding intake channel one of the intake pressure regulating chamber assembly 3... When the pressure is higher than the negative pressure in the corresponding intake passage 2 of the intake manifold assembly 1, the valve plate of the reed valve assembly 2 of the corresponding passage undergoes directional elastic deformation under the action of the pressure difference on both sides, realizing one-way opening to open the intake passage. The two sets of reed valve assemblies 2 open and close independently only in response to the pressure difference change of the corresponding passage, without interfering with each other. The fresh air after pressure stabilization enters the corresponding intake passage 2 of the intake manifold assembly 1 through the open reed valve assembly 2. Relying on the design of two completely independent intake passages, the airflow crosstalk and air grabbing problems caused by the intake phase difference of the dual rotors are completely avoided, ensuring that the intake charge of the two rotors is completely consistent. Finally, the fresh air enters the working chamber of the corresponding rotor precisely through the outlet of the intake manifold assembly 1, completing the fresh air supply of the intake stroke and providing a sufficient combustible mixture basis for the subsequent compression and power strokes.

[0033] When the intake stroke ends and the rotor enters the compression stroke, the triangular rotor rotates the air-fuel mixture in the compression chamber, causing the pressure in the chamber to rise rapidly. The high-pressure gas flows back through the rotor inlet to the corresponding intake passage two of the intake manifold assembly 1. During the power stroke, the high-temperature, high-pressure combustion gas generated by the combustion of the air-fuel mixture in the cylinder also poses a risk of backflow into the intake manifold assembly 1 through the inlet. Both operating conditions create a reverse pressure differential environment where the pressure in the corresponding intake passage two of the intake manifold assembly 1 is higher than the pressure in the corresponding intake passage one of the intake pressure regulating chamber assembly 3. At this time, the valve plate of the reed valve assembly 2 in the corresponding passage quickly rebounds and resets under the action of the reverse pressure differential, tightly fitting the valve seat to form an effective pressure difference. The surface is sealed, completely blocking the reverse flow channel of airflow, thus avoiding the problems of reduced charging efficiency and engine power loss caused by intake backflow from the root. At the same time, because the reed valve assembly 2 is located between the intake manifold assembly 1 and the intake pressure regulating chamber assembly 3, away from the high temperature and high pressure chamber on the rotor side, the backflow of high temperature and high pressure gas is completely blocked on the downstream side of the reed valve assembly 2 and cannot contact the core working surface of the valve plate. Combined with the continuous cooling of the room temperature fresh intake air in the intake pressure regulating chamber assembly 3, the working heat load of the valve plate is greatly reduced, and the core defects of the traditional solution, such as the valve plate being directly eroded by high temperature gas and high frequency pressure impact, resulting in thermal fatigue, elastic failure and short service life, are completely solved.

[0034] During system assembly, a positioning pin structure consisting of long positioning pin 1-1, short positioning pin 1-2, short positioning pin 2-3, and long positioning pin 2-4 is used to achieve precise coaxial alignment and circumferential error prevention of the intake manifold assembly 1, the two reed valve assemblies 2, and the intake pressure regulating chamber assembly 3. This ensures that the valve plate of the reed valve assembly 2 is completely coaxially aligned with the intake channel, completely eliminating problems such as valve plate wear, opening and closing jamming, and air leakage on the sealing surface caused by assembly deviations. This not only improves the efficiency and consistency of batch assembly, but also ensures the stability of the opening and closing action of the reed valve assembly 2 and the long-term sealing reliability of the system. It avoids abnormal valve plate failure and intake leakage caused by assembly errors. The fastening bolts are inserted into the bolt mounting holes of the three coaxially aligned components to complete the locking and fixing, ensuring the stability and sealing of the connection.

[0035] Two sensor mounting interfaces are provided on the outer wall of the intake manifold assembly 3, allowing for the installation of corresponding sensors to monitor the pressure and temperature parameters of the two intake channels in real time. This provides accurate intake data for the engine's electronic control system to control fuel injection quantity and ignition timing. The dual-redundant monitoring design avoids engine control anomalies caused by single sensor failure, significantly improving the reliability of intake parameter detection and engine operating stability. The intake manifold assembly 1 and the intake manifold assembly 3 are made of reinforced nylon material, which significantly reduces the overall weight of the system while ensuring structural strength, connection rigidity, and sealing performance. At the same time, the material's low thermal conductivity effectively blocks the transfer of heat from the engine block to the intake manifold assembly 3, reducing the intake temperature and increasing the intake charge density, further optimizing the engine's power output. The valve plates of the reed valve assembly 2 are made of stainless steel or carbon fiber, which can fully meet the high-frequency opening and closing requirements under high engine speed conditions. They also have excellent directional elasticity, fatigue resistance, high temperature resistance, and corrosion resistance, making them suitable for the long-term working environment of the intake system.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An intake system suitable for a dual-rotor engine, characterized in that: It includes an intake manifold assembly (1), an intake pressure regulating chamber assembly (3), a positioning pin structure, and two reed valve assemblies (2). The intake pressure regulating chamber assembly (3) has two independent intake channels, and the intake manifold assembly (1) has two independent intake channels. The two intake channels of the intake manifold assembly (1) correspond one-to-one with the two intake channels of the intake pressure regulating chamber assembly (3). The two reed valve assemblies (2) are respectively located between each corresponding intake channel and intake channel. Each reed valve assembly (2) is a reed-type one-way valve, and its valve plate can only be elastically deformed to open on the side of the intake manifold assembly (1), so that the airflow flows unidirectionally from the intake pressure regulating chamber assembly (3) to the intake manifold assembly (1). The two end faces of the reed valve assembly (2) are respectively sealed and fitted with the intake manifold assembly (1) and the intake pressure regulating chamber assembly (3). The intake manifold assembly (1), the two reed valve assemblies (2) and the intake pressure regulating chamber assembly (3) are axially coaxially positioned and circumferentially anti-misaligned inserted and fitted by the positioning pin structure. The intake manifold assembly (1), the two reed valve assemblies (2) and the intake pressure regulating chamber assembly (3) are detachably fixed and connected by bolts. The outlet ends of the two intake channels of the intake manifold assembly (1) are provided with flange structures. The flange structures are used to seal and connect one-to-one with the two rotor intake ports of the dual rotor engine.

2. The intake system for a dual-rotor engine according to claim 1, characterized in that: The positioning pin structure includes four positioning pins, all of which are set on the intake end face of the intake manifold assembly (1). Each reed valve assembly (2) has two positioning pin holes one, and the intake pressure regulating chamber assembly (3) has two positioning pin holes two. Each positioning pin is coaxially inserted with the corresponding positioning pin hole one and positioning pin hole two along the axial direction of the corresponding intake channel, so as to achieve precise alignment of the intake manifold assembly (1), the two reed valve assemblies (2) and the intake pressure regulating chamber assembly (3) at the contact end face.

3. An intake system suitable for a dual-rotor engine according to claim 2, characterized in that: The four positioning pins are long positioning pin one (1-1), short positioning pin one (1-2), short positioning pin two (1-3) and long positioning pin two (1-4). The long positioning pin 1 (1-1) and the short positioning pin 1 (1-2) correspond to the two positioning pin holes 1 of one of the reed valve assemblies (2), and the short positioning pin 2 (1-3) and the long positioning pin 2 (1-4) correspond to the two positioning pin holes 1 of the other reed valve assembly (2). The axial length of the short positioning pin 1 (1-2) and the short positioning pin 2 (1-3) matches the depth of the positioning pin holes 1 of the corresponding reed valve assembly (2) and is completely accommodated in the positioning pin holes 1 of the corresponding reed valve assembly (2). The ends of the short positioning pin 1 (1-2) and the short positioning pin 2 (1-3) do not extend beyond the reed valve assembly (2) toward the intake pressure regulating chamber. On one side end face of the assembly (3), long positioning pin one (1-1) and long positioning pin two (1-4) pass through the positioning pin hole one of the corresponding reed valve assembly (2). The ends of long positioning pin one (1-1) and long positioning pin two (1-4) extend to the side end face of the reed valve assembly (2) facing the intake pressure regulating chamber assembly (3) and are inserted into the corresponding positioning pin hole two of the intake pressure regulating chamber assembly (3). Long positioning pin one (1-1), short positioning pin one (1-2), short positioning pin two (1-3) and long positioning pin two (1-4) are arranged sequentially along the two intake channels, with long positioning pins at both ends and short positioning pins in the middle.

4. An intake system suitable for a dual-rotor engine according to claim 1, characterized in that: On the corresponding connecting end faces of the intake manifold assembly (1), the two reed valve assemblies (2) and the intake pressure regulating chamber assembly (3), there are multiple sets of bolt mounting holes with overlapping axes. The fastening bolts are inserted into the bolt mounting holes with overlapping axes to lock and fix the three together.

5. An intake system suitable for a dual-rotor engine according to claim 1, characterized in that: The outer wall of the intake pressure regulating chamber assembly (3) has two sensor mounting interfaces, which are connected to the two intake channels one by one.

6. An intake system suitable for a dual-rotor engine according to claim 1, characterized in that: The intake manifold assembly (1) and the intake pressure regulating chamber assembly (3) are both integrally injection molded from reinforced nylon material, and the valve plates of each reed valve assembly (2) are made of stainless steel or carbon fiber.

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