Novel rotary type double-rotor piston pressure pumping mechanism

Abstract

The invention discloses a novel rotary double-rotor piston pumping mechanism which comprises a shell, a precise sleeve assembly is arranged in the shell, and the precise sleeve assembly comprises two parallel and independent working cavities; an air inlet, a pre-compression opening, a transfer opening and an exhaust opening are formed in the peripheral wall of the precise sleeve assembly. According to the novel rotary type double-rotor piston pressure pumping mechanism, through an innovative double-rotor phase difference cooperation mechanism, a revolutionary cross-shaped buffering blocking plug sealing system, an efficient double-vortex combustion chamber and volume differentiation design, four-stroke circulation is successfully and equivalently achieved in a rotation period; the rotary engine integrates the advantages of compact structure and stable operation of a rotary engine, effectively overcomes the inherent defects of the traditional rotary engine in the aspects of torque, oil consumption and sealing reliability, is obviously superior to a reciprocating engine in power density and vibration performance, and represents a breakthrough design with great potential in the field of power / compression core parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of internal combustion engines, in particular to a novel rotary double-rotor piston pumping mechanism. BACKGROUND

[0002] Rotary piston engines, as a kind of internal combustion engine with a structure different from traditional reciprocating piston engines, have been concerned for their potential advantages of compact structure, high power density, smooth operation and low vibration and noise since their birth, among which the most famous representative is the Wankel triangular rotor engine. However, despite decades of development, rotary engines have not yet become the mainstream in the power field, and the fundamental reason is that a series of technical bottlenecks have not been completely solved for a long time.

[0003] Firstly, the sealing problem is the core difficulty restricting the development of rotary engines. The radial sealing sheet, end face sealing strip and angular sealing structure of the triangular rotor engine wear severely at high speed, which easily leads to gas leakage, not only causing the engine power to decrease and the fuel consumption to increase, but also being the main reason for its poor reliability and short service life. At the same time, the traditional sealing structure is difficult to effectively balance the contradiction between sealing and wear.

[0004] Secondly, the shape of the combustion chamber is not ideal. The combustion chamber of the triangular rotor engine is long and flat in crescent shape, with a surface area to volume ratio (surface area to volume ratio) that is too large, resulting in serious heat loss, long and uneven flame propagation path, and low combustion efficiency. This directly causes the inherent defects of poor fuel economy and high exhaust emission (especially hydrocarbon HC) of such engines, which is difficult to meet the increasingly stringent environmental regulations.

[0005] Thirdly, the low-speed torque is insufficient. Due to its working characteristics, the torque output of the triangular rotor engine is more biased towards the high-speed range, and the torque is weak at low speed, which affects the starting and acceleration performance of the vehicle and limits its application range.

[0006] In addition, although the traditional reciprocating piston engine is mature in technology and has high thermal efficiency, its structure is complex, containing a large number of reciprocating components such as crankshaft, connecting rod, valve mechanism, etc., resulting in large volume, heavy weight, obvious vibration of the engine, and the improvement of power density has reached the bottleneck.

[0007] Therefore, we propose a novel rotary double-rotor piston pumping mechanism to solve the problem that the existing rotary double-rotor piston pumping mechanism cannot achieve perfect balance in sealing reliability, thermal efficiency, manufacturing cost and performance. SUMMARY

[0008] The present application aims to provide a new rotary double-rotor piston pumping mechanism to solve the sealing problem of the current rotary double-rotor piston pumping mechanism, which is not good, the shape of the combustion chamber is not ideal, and the speed and torque are insufficient.

[0009] To achieve the above object, the present application provides the following technical scheme: a new rotary double-rotor piston pumping mechanism, comprising a housing, a precision sleeve assembly is arranged inside the housing, and the precision sleeve assembly comprises two parallel and independent working chambers; an air inlet, a pre-compression port, a transfer port and an exhaust port are formed on the peripheral wall of the precision sleeve assembly; a main shaft is rotatably supported on the precision sleeve assembly; two sets of rotor pistons are arranged and fixedly installed on the main shaft and rotate synchronously; a blocking plug body is embedded in the inside of the precision sleeve assembly and located between the precision sleeve assembly and the rotor pistons; and a reaction force blocking spring is arranged between the top of the blocking plug body and the outer wall of the precision sleeve assembly.

[0010] Preferably, the rotor pistons are symmetrically arranged and have a specific phase difference, and the phase difference angle is set according to the target compression ratio and expansion ratio, and the range is between 9 degrees and 72 degrees, preferably 36 degrees.

[0011] Preferably, the rotor pistons rotate in the sleeve assembly, and the profile of the rotor pistons is precisely matched with the inner wall of the sleeve assembly to form a variable-volume working chamber.

[0012] Preferably, the blocking plug body has a cross-shaped structure, the radial sealing surface of the blocking plug body is matched with the outer profile surface of the rotor piston, and the end surface sealing surface of the blocking plug body is matched with the inner end surface of the precision sleeve assembly, thereby realizing bidirectional sealing of the radial and end surfaces.

[0013] Preferably, a single-way valve is arranged between the working chambers, and the two ends of the single-way valve are connected with the pre-compression port and the transfer port, respectively.

[0014] Preferably, the combustion chamber wall surface of the rotor piston is designed as a double-vortex structure for guiding the working medium to form a turbulent flow in the compression stroke and promoting the mixing of fuel and air.

[0015] Preferably, the volume of the intake compression chamber where the rotor piston is located is greater than the volume of the combustion and exhaust chamber where the rotor piston is located.

[0016] Preferably, when the mechanism is used as an internal combustion engine, a fuel injector and an ignition device are further arranged on the housing, and the nozzle of the fuel injector corresponds to the downstream of the transfer port of the rotor piston chamber.

[0017] Compared with the prior art, the new rotary double-rotor piston pumping mechanism has the following advantages:

[0018] 1. Revolutionary cycle efficiency: The unique dual-rotor phase difference synergy design is the core breakthrough, which realizes the equivalent completion of the complete "intake -> compression -> work -> exhaust" four-stroke cycle in one rotation cycle, which significantly improves the theoretical cycle frequency and power density.

[0019] 2. Structure simplification and high power density: The complex inertia components such as crankshaft, connecting rod, reciprocating piston of traditional reciprocating engine are completely abandoned, the number of moving parts is greatly reduced, and the structure is extremely compact, the volume and weight power density is significantly better than the same power reciprocating engine, the motion balance is better, and the inherent vibration is greatly reduced;

[0020] 3. Excellent air tightness and reliability: The patented cross-shaped air tightness barrier plug system and rotating piston are the key technologies, which provide excellent radial and end face sealing performance, effectively solve the core challenge of rotating mechanism - inter-chamber gas leakage, the integrated horizontal buffer design of barrier plug is specially designed for longitudinal force impact during operation, actively absorbs energy, greatly protects the integrity and long-term reliability of the core sealing pair, reduces wear;

[0021] 4. High-efficiency combustion and thermodynamic optimization: Dual-vortex combustion chamber design, promotes the rapid and sufficient mixing of fuel and air, can realize nearly ideal homogeneous mixing or stratified combustion, significantly improves the combustion speed and completeness;

[0022] 5. Optimized combustion path: The combustion process continues in nearly 360 degrees of rotation (super-long expansion stroke concept), fuel combustion efficiency is as high as about 70%, maximizing the use of heat energy;

[0023] 6. Differentiated chamber volume: The volume of the A group intake chamber is designed to be larger than that of the B group combustion chamber, this key design increases the intake volume, improves the charging efficiency, and substantially increases the expansion ratio (volume ratio of work stroke to compression stroke after combustion), which is a key thermodynamic means to improve thermal efficiency, directly contributing to low fuel consumption and high torque;

[0024] 7. Comprehensive performance advantage: Compared with reciprocating piston engine: simple and compact structure, high power density, low vibration and noise, high theoretical mechanical efficiency (no reciprocating inertia loss, fewer friction pairs), compared with Wankel engine, overcomes the weakness of low speed torque, benefits from optimized combustion chamber design and possible higher compression ratio / expansion ratio, low speed torque characteristics are significantly improved, solves the challenges of high fuel consumption and emission, through efficient dual-vortex combustion, super-long expansion stroke, high combustion efficiency design, target fuel consumption and emission level is lower, air tightness is more reliable and durable, the combination design of cross barrier plug and rotating piston is better than the challenge of rotor sealing and wear resistance, the shape of the combustion chamber is more conducive to optimizing combustion (compared with the long strip-shaped combustion chamber of Wankel);

[0025] Summary: The new rotary dual-rotor piston pumping mechanism successfully realizes four-stroke cycle in one rotation cycle through innovative dual-rotor phase difference coordination mechanism, revolutionary cross-shaped buffer barrier plug sealing system, and efficient double-vortex combustion chamber and volume differentiation design. It combines the advantages of compact structure and smooth operation of rotary engines, effectively overcomes the inherent defects of traditional rotary engines (such as Wankel) in torque, fuel consumption, and sealing reliability, and significantly outperforms reciprocating engines in power density and vibration performance, representing a breakthrough design with great potential in the field of power / compression core components. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall three-dimensional structure of the present application;

[0027] Figure 2 is a schematic diagram of the bottom cross-sectional structure of the shell of the present application;

[0028] Figure 3 is a schematic diagram of the top view structure of the shell of the present application;

[0029] Figure 4 is a schematic diagram of the side cross-sectional structure of the working chamber of the present application;

[0030] Figure 5 is a schematic diagram of the front cross-sectional structure of the shell of the present application;

[0031] Figure 6 is a schematic diagram of the distribution structure of the rotor piston and barrier plug body of the present application;

[0032] Figure 7 is a schematic diagram of the side view structure of the precision sleeve assembly of the present application;

[0033] Figure 8 is a schematic diagram of the front view structure of the working chamber of the present application.

[0034] In the figure: 1, shell; 2, precision sleeve assembly; 201, working chamber; 202, intake port; 203, pre-compression port; 204, transfer port; 205, exhaust port; 3, single-throw valve; 4, main shaft; 5, rotor piston; 6, barrier plug body; 7, reaction force blocking spring. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] Please refer to Figures 1-8The application provides a technical scheme: a novel rotary double-rotor piston pumping mechanism, which comprises a shell 1, an inner part of which is provided with a precision sleeve assembly 2, and the precision sleeve assembly 2 comprises two parallel and independent working chambers 201; an air inlet 202, a pre-compression port 203, a transfer port 204 and an exhaust port 205 are formed in the peripheral wall of the precision sleeve assembly 2; a main shaft 4 is rotatably supported on the precision sleeve assembly 2; two groups of rotor pistons 5 are arranged and fixedly installed on the main shaft 2 and synchronously rotate with the main shaft 2; a blocking plug body 6 is embedded in the inner side of the precision sleeve assembly 2 and located between the precision sleeve assembly 2 and the rotor pistons 5; and a reaction force blocking spring 7 is arranged between the top of the blocking plug body 6 and the outer wall of the precision sleeve assembly 2.

[0037] The rotor pistons 5 are symmetrically arranged and have a specific phase difference, the phase difference angle is set according to a target compression ratio and expansion ratio, and the range is between 9 degrees and 72 degrees, preferably 36 degrees; the rotor pistons 5 rotate in the precision sleeve assembly 2, the profile of the rotor pistons 5 is precisely matched with the inner wall of the precision sleeve assembly 2, and the working chambers 201 with variable volumes are formed; the blocking plug body 6 has a cross-shaped structure, the radial sealing surface of the blocking plug body 6 is matched with the outer profile surface of the rotor pistons 5, the end surface sealing surface of the blocking plug body 6 is matched with the inner end surface of the precision sleeve assembly 2, and the radial and end surface double-directional sealing is realized; a single-row valve 3 is arranged between the working chambers 201, and the two ends of the single-row valve 3 are connected with the pre-compression port 203 and the transfer port 204 respectively; the combustion chamber wall surface of the rotor pistons 5 is designed as a double-vortex structure, which is used for guiding the working medium to form a turbulent flow in the compression stroke and promoting the mixing of fuel and air; the volume of the intake compression cavity where the rotor pistons 5 are located is greater than the volume of the combustion and exhaust cavity where the rotor pistons 5 are located; when the mechanism is used as an internal combustion engine, the mechanism further comprises a fuel injector and an ignition device arranged on the shell 1, and the nozzle of the fuel injector corresponds to the downstream of the transfer port 204 of the rotor pistons 5.

[0038] Core structure: the core of the mechanism lies in that the A and B groups of rotor structures are symmetrically arranged and have a specific phase difference, each group of structures comprises:

[0039] 1. The precision sleeve assembly 2: the main structure of the working chamber 201, which is provided with key function ports (the air inlet 202, the pre-compression port 203, the transfer port 204 and the exhaust port 205);

[0040] 2. The rotary rotor piston 5: rotating in the precision sleeve assembly 2, the profile of the rotor piston 5 is precisely matched with the inner wall of the precision sleeve assembly 2, and the working chamber 201 with a variable volume is formed;

[0041] 3. Cross-shaped airtight barrier plug body 6: located between the precision sleeve assembly 2 and the rotor piston 5, the core function is to realize radial and end face double-dimensional airtightness, and strictly isolate the chambers (such as the intake / compression chamber, the combustion / exhaust chamber); its design includes a longitudinal buffer structure, which effectively absorbs the axial impact load generated during operation and protects the core sealing interface;

[0042] Core working principle (equivalent four-stroke single-cycle): through precise control of the fixed phase difference between A and B groups of rotors (for example, 36 degrees or a specific design angle, 9 to 10 times compression ratio, the specific angle is adjusted according to the required power compression ratio), in a complete mechanism rotation period, the equivalent process of traditional four-stroke cycle is completed collaboratively:

[0043] 1. Intake and pre-compression phase (A group dominant):

[0044] A group rotor piston 5 rotates to the intake port 202 position: the A group rotor piston 5 and the barrier plug body 6 form a chamber with increased volume, generating negative pressure, and sucking in fresh working medium (air or mixed gas); synchronously, the A group rotor piston 5 rotates to the pre-compression port 203 position: in another area (or adjacent chamber) of the A group, the working medium sucked in the previous cycle is subjected to primary compression, and its pressure and temperature are increased;

[0045] 2. Compressed gas transfer and oil injection phase (A / B group precise collaboration):

[0046] B group rotor piston 5 reaches the transfer port 204 position (A group pre-compression is completed), when the B group rotor piston 5 reaches the set phase and the A group pre-compression chamber reaches the target pressure, the pre-compression port 203 and the transfer port 204 inlet barrier switch controlled by the camshaft system opens accurately in time;

[0047] Working medium transfer: the A group pre-compressed gas is efficiently transported to the B group ready combustion chamber through the internal single-way valve 3;

[0048] Fuel injection: synchronously or immediately after, the high-pressure fuel injection system precisely atomizes and injects fuel into the compressed gas in the B group combustion chamber, forming combustible mixed gas;

[0049] 3. Combustion and work phase (B group dominant):

[0050] Ignition / compression ignition: the mixed gas is ignited by the spark plug and undergoes rapid combustion and expansion;

[0051] Energy conversion: the generated high-temperature and high-pressure gas directly acts on the reaction force of the working surface of the B group rotor piston 5 without barrier plug, pushing the B group rotor piston 5 to generate strong rotary torque;

[0052] Power output: this rotary torque is directly output through the shared linkage shaft (main shaft 4), converting into continuous torque and power.

[0053] Synchronization preparation: At the same time, as the B group rotor piston 5 rotates, the volume of the gas chamber after work is changed to prepare for the subsequent exhaust stage;

[0054] 4. Exhaust stage (A / B group transposition coordination):

[0055] B group rotor piston 5 reaches the exhaust port 205 position: the burned and expanded exhaust gas is forced out of the chamber by the pressure formed by the blocking plug body 6 and the decrease in chamber volume when the B group rotates to the exhaust port 205;

[0056] A group seamless connection: At this time, thanks to the fixed phase difference, the A group rotor piston 5 has rotated to the intake starting phase of its next cycle, and immediately starts a new round of intake process, ensuring the high continuity and stability of power output.

[0057] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; It can be mechanically connected, or it can be electrically connected; It can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A novel rotary dual-rotor piston pumping mechanism, characterized in that, include: The housing (1) has a precision sleeve assembly (2) inside, and the precision sleeve assembly (2) includes two parallel and independent working chambers (201). The precision sleeve assembly (2) has an air inlet (202), a pre-compression port (203), a transfer port (204) and an exhaust port (205) on its peripheral wall. The main shaft (4) is rotatably supported on the precision sleeve assembly (2); Two sets of rotor pistons (5) are provided, which are respectively housed in the working chamber (201) and fixedly installed on the main shaft (2) and rotate synchronously with it; The blocking plug body (6) is embedded inside the precision sleeve assembly (2) and located between the precision sleeve assembly (2) and the rotor piston (5); A reaction force blocking spring (7) is disposed between the top of the blocking plug body (6) and the outer wall of the precision sleeve assembly (2).

2. The novel rotary dual-rotor piston pumping mechanism according to claim 1, characterized in that: The rotor piston (5) is symmetrically arranged and has a specific phase difference. The phase difference angle is set according to the target compression ratio and expansion ratio, and ranges from 9 degrees to 72 degrees, preferably 36 degrees.

3. The novel rotary dual-rotor piston pumping mechanism according to claim 2, characterized in that: The rotor piston (5) rotates inside the precision sleeve assembly (2), and its contour is precisely matched with the inner wall of the precision sleeve assembly (2) to form a variable volume working chamber (201).

4. The novel rotary dual-rotor piston pumping mechanism according to claim 3, characterized in that: The barrier plug body (6) has a cross-shaped structure. Its radial sealing surface is adapted to the outer contour surface of the rotor piston (5), and its end sealing surface is adapted to the inner end face of the precision sleeve assembly (2), so as to achieve a two-way seal in both the radial and end faces.

5. The novel rotary dual-rotor piston pumping mechanism according to claim 1, characterized in that: A single-row valve (3) is provided between the working chambers (201), and the two ends of the single-row valve (3) are connected to the pre-compression port (203) and the transfer port (204) respectively.

6. The novel rotary dual-rotor piston pumping mechanism according to claim 1, characterized in that: The combustion chamber wall of the rotor piston (5) is designed as a double vortex structure to guide the working fluid to form turbulence during the compression stroke and promote the mixing of fuel and air.

7. The novel rotary dual-rotor piston pumping mechanism according to claim 1, characterized in that: The volume of the intake compression chamber where the rotor piston (5) is located is greater than the volume of the combustion exhaust chamber where the rotor piston (5) is located.

8. The novel rotary dual-rotor piston pumping mechanism according to claim 1, characterized in that: When the mechanism is used as an internal combustion engine, it also includes a fuel injector and an ignition device disposed on the housing (1), wherein the nozzle of the fuel injector corresponds to the downstream of the transfer port (204) of the rotor piston (5) chamber.

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