Coaxial linear reciprocating internal combustion pulse power generation device

Abstract

The application discloses a coaxial linear reciprocating internal combustion pulse power generation device, which comprises at least one group of internal combustion engines without crankshafts and at least one group of linear generators; a piston of the internal combustion engine is rigidly connected with a piston rod; the reciprocating movement of the piston directly drives the piston rod to move linearly, and further drives a mover of the linear generator to cut magnetic force lines of a stator coil to generate electricity. The linear generator can be coaxially arranged in series or arranged in a polygonal star distribution mode such as a triangular star mode, a quadrangular star mode, a pentagonal star mode and a hexagonal star mode; the mover adopts a single-section type, a double-section type, a three-section type or a multi-section type coaxial structure. The application cancels the crankshaft and the connecting rod, the mechanical loss tends to be zero, and the power generation efficiency is above 95%. The distributed arrangement scheme shortens the total length by above 40%, the modular design can realize flexible expansion of power, the structure is simple and reliable, and the application is particularly suitable for the field of range extenders of new energy vehicles.

Description

Technical Field

[0001] This invention relates to the field of internal combustion engine power generation technology, and in particular to a crankshaft-less coaxial linear reciprocating internal combustion pulse power generation device. Background Technology

[0002] In the prior art, BYD Co., Ltd. disclosed a patent related to a horizontally opposed engine (publication number: CN115898631A). The disclosed 2.0T horizontally opposed engine is a four-cylinder structure with a crankshaft. The piston is connected to the crankshaft through a connecting rod, and then drives the generator to generate electricity. There is a mechanical loss of about 5%-8%. When this structure is used as a range extender, it is usually arranged in a coaxial series, which has a long total length and is difficult to adapt to the limited installation space of new energy vehicles. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a crankshaft-free coaxial linear reciprocating internal combustion pulse generator. By eliminating the crankshaft and connecting rod, the piston directly drives the mover to generate electricity, and the mechanical loss approaches zero. At the same time, it provides a distributed multi-group arrangement scheme and a modular segmented mover design to solve the problem of excessive coaxial series length, realize flexible power expansion, and better adapt to the installation needs of new energy vehicles with different power levels.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A coaxial linear reciprocating internal combustion pulse power generation device includes at least one set of crankshaftless internal combustion engines and at least one set of linear generators. The piston of the internal combustion engine is rigidly connected to the piston rod, and the piston rod directly drives the linear generator mover to perform linear reciprocating motion to generate electricity. The linear generators can be arranged in a coaxial series arrangement or a polygonal star-shaped distributed arrangement. When arranged in a distributed multi-set arrangement, multiple linear generators are evenly distributed around the center of the internal combustion engine in a regular polygonal pattern.

[0006] Furthermore, the polygonal star-shaped distributed arrangement includes any one of triangular, quadrangular, pentagonal, and hexagonal stars, with the number of linear generators equal to the number of star sides, and connected to the same piston rod through star-shaped connecting rods of corresponding shapes.

[0007] Furthermore, the mover adopts a modular segmented design, and can be selected as a single-segment, double-segment, three-segment, or multi-segment coaxial structure. The axial length of a single-segment mover is 30~50mm, preferably 40mm; the axial length of a single stator segment is the sum of the mover length and the reciprocating stroke, with a reciprocating stroke of 90mm. The axial length of a single stator segment is 120~140mm, preferably 130mm.

[0008] Furthermore, the mover core is formed by winding 50WW470 non-oriented silicon steel sheets, and N52UH high-temperature resistant neodymium iron boron permanent magnets are attached to the outer circular surface of the mover. The permanent magnets are radially magnetized, and the size of a single piece is 40mm×30mm×6mm. 18 permanent magnets are evenly distributed around the circumference of each mover segment.

[0009] The beneficial effects of this invention are as follows:

[0010] 1. By eliminating the crankshaft and connecting rod, mechanical losses approach zero, resulting in a power generation efficiency of over 95%.

[0011] 2. Offers a distributed multi-group layout scheme, reducing the total length by more than 40% and resulting in a more compact structure;

[0012] 3. When arranged in triangles or larger polygons, the inertial forces are completely canceled out, resulting in a lower vibration level;

[0013] 4. Modular segmented mover design allows for flexible adjustment of the number of mover segments and generators according to power requirements, with the total power adjustable between 30kW and several hundred kilowatts;

[0014] 5. The structure is simple, the number of parts is reduced by more than 60%, the reliability is high, and the maintenance cost is low. Attached Figure Description

[0015] Figure 1 is a cross-sectional view of the overall structure of a coaxial linear reciprocating internal combustion pulse generator (wire-wound excitation type);

[0016] Figure 2 is a partially enlarged structural schematic diagram of the wire-wound iron core mover (generator unit);

[0017] Figure 3 is a schematic diagram of the overall structure of a permanent magnet type coaxial linear reciprocating internal combustion pulse generator.

[0018] Figure 4 is a schematic diagram of the assembly of the three-section permanent magnet generator mover assembly;

[0019] Figure 5 is a schematic diagram of the three-section generator stator assembly;

[0020] Figure 6 is a radial sectional view of the permanent magnet actuator and stator assembly;

[0021] Figure 7 is a schematic diagram of the generator mover core structure;

[0022] Figure 8 is a schematic diagram of the permanent magnet structure of the generator mover;

[0023] Figure 9 is a schematic diagram of the non-magnetic flange structure;

[0024] Figure 10 is an axial sectional view of a permanent magnet type mover;

[0025] Figure 11 is a side view of a permanent magnet actuator generator;

[0026] Figure 12 shows the horizontally installed connecting rods for three generators;

[0027] Figure 13 is a schematic diagram of three generators installed horizontally.

[0028] Explanation of markings in the diagram:

[0029] 1— Engine outlet; 2— Engine cylinder; 3— Engine piston; 4— Piston connecting rod; 5— CuCrZr copper chromium zirconium sliding guide plate fixed on the piston connecting rod; 6— Mover carbon slider; 7— Mover excitation power supply connection; 8— Stator coil; 11— Engine intake port; 12— Engine cylinder block with cooling system; 13— Stator winding power supply connection; 15— Mover winding connection to mover sliding guide plate; 16— Non-magnetic flange; 17— Mover core; 18— Mover winding; 19— Permanent magnet; 20— Stator-motor gap; 21— Air gap between permanent magnets; 22— Stator winding insulation gasket; 23— Generator mover gasket; 24— Triangular connecting rod; 26— Mover connecting bushing. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] Example 1: Three-section coaxial series connection scheme for the mover

[0032] As shown in Figures 1, 3, 4, and 5, the coaxial linear reciprocating internal combustion pulse generator of this embodiment includes a two-cylinder horizontally opposed internal combustion engine and a three-section linear generator.

[0033] The internal combustion engine includes an engine cylinder 2, an engine piston 3, and an engine block 12 with cooling. The two pistons 3 are rigidly connected to both ends of the piston rod 4, and the mechanical output power is 90kW.

[0034] The linear generator includes a three-section mover assembly and a three-section stator assembly. The mover assembly includes three sections of mover, each of which includes a mover core 17 and a permanent magnet 19. The mover core 17 is formed by winding 50WW470 non-oriented silicon steel sheets. Eighteen N52UH permanent magnets 19 are attached to the outer surface of the mover. The permanent magnets are radially magnetized.

[0035] The axial length of a single moving part is 40mm. The three moving parts are rigidly connected by a non-magnetic flange 16 and a moving part connecting bushing 26, with a total length of 120mm.

[0036] The stator assembly consists of three stator groups, each of which includes stator coils 8 and stator winding insulation pads 22. The stator coils are wound vertically axially, and the axial length of a single stator segment is 130mm. The three stator groups are connected in series axially, with a total length of 390mm.

[0037] The air gap between the stator and the mover is 0.5mm, the reciprocating stroke of the mover is 90mm, the operating frequency is 65Hz, the linear velocity is 11.7m / s, the power generation of a single mover is 30kW, the total power generation is 90kW, and the power generation efficiency is not less than 95%.

[0038] Example 2: Triangular Star Arrangement Scheme

[0039] As shown in Figures 12 and 13, the crankshaftless internal combustion pulse generator with a triangular star arrangement in this embodiment includes a two-cylinder horizontally opposed internal combustion engine, three linear generators, and a triangular connecting rod 24.

[0040] The internal combustion engine has the same structure as in Example 1, and its mechanical output power is 90kW.

[0041] Three linear generators are evenly distributed in an equilateral triangle around the center of the internal combustion engine. Each linear generator has a single-section structure with a mover axial length of 40mm and a stator axial length of 130mm. The power output of a single generator is 30kW.

[0042] The triangular connecting rod 24 is made of high-strength aluminum alloy. Its center is rigidly connected to the piston rod 4, and its three ends are rigidly connected to the movers of the three linear generators, respectively.

[0043] The reciprocating motion of the piston directly drives the piston rod to move linearly, which in turn drives the movers of three linear generators to move linearly and reciprocate to generate electricity through a triangular connecting rod. The total power generation is 90kW.

[0044] The total length of this embodiment is only 220mm, which is more than 40% shorter than the coaxial series solution. The structure is more compact and better suited to the installation space of the front compartment of new energy vehicles.

[0045] Example 3: Four-pointed star arrangement scheme

[0046] The crankshaftless internal combustion pulse generator with a four-corner star arrangement in this embodiment includes a two-cylinder horizontally opposed internal combustion engine, four linear generators, and a cross-shaped connecting rod.

[0047] The internal combustion engine has the same structure as in Example 1, and its mechanical output power is 120kW.

[0048] Four linear generators are evenly distributed in a square around the center of the internal combustion engine. Each linear generator has a single-section structure with a mover axial length of 40mm and a stator axial length of 130mm. The power output of a single generator is 30kW.

[0049] The center of the cross-shaped connecting rod is rigidly connected to the piston rod, and the four ends are rigidly connected to the movers of the four linear generators respectively.

[0050] The reciprocating motion of the piston directly drives the piston rod to move linearly, which in turn drives the movers of four linear generators to move linearly and reciprocate to generate electricity through a cross-shaped connecting rod. The total power generation is 120kW.

[0051] Example 4: Two-segment coaxial series connection scheme for the mover

[0052] The coaxial linear reciprocating internal combustion pulse generator of this embodiment includes a two-cylinder horizontally opposed internal combustion engine and a two-stage linear generator.

[0053] The internal combustion engine has the same structure as in Example 1, and its mechanical output power is 60kW.

[0054] The linear generator consists of a two-section mover assembly and a two-section stator assembly. The mover assembly consists of two mover sections, each with an axial length of 40mm, which are rigidly connected by a non-magnetic flange, with a total length of 80mm.

[0055] The stator assembly consists of two sets of stators, each with an axial length of 130mm. The two sets of stators are connected in series axially, with a total length of 260mm.

[0056] The moving part has a reciprocating stroke of 90mm, an operating frequency of 65Hz, a single moving part power generation of 30kW, and a total power generation of 60kW.

[0057] This embodiment is suitable for the range extension needs of medium-power new energy vehicles, and features a compact structure and lower cost.

Claims

1. A coaxial linear reciprocating internal combustion pulse generator, characterized in that, include: At least one crankshaftless internal combustion engine, the internal combustion engine including a cylinder and a piston, the piston being rigidly connected to the piston rod, the reciprocating motion of the piston directly driving the piston rod to perform linear motion; At least one set of linear generators, the linear generators including stator and mover, the mover being rigidly connected to piston rod, the mover moving with piston rod to perform linear reciprocating motion to cut the magnetic lines of force of stator coil to generate electricity; The linear generator can be arranged in a coaxial series or in a polygonal star-shaped distributed arrangement. In the polygonal star-shaped distributed arrangement, multiple linear generators are evenly distributed in a regular polygon around the center of the internal combustion engine, and the mover of each linear generator is connected to the same piston rod through a star-shaped connecting rod.

2. The power generation device according to claim 1, characterized in that, The polygonal star-shaped distributed arrangement includes any one of the following: triangular star, quadrangular star, pentagonal star, and hexagonal star, and the number of linear generators is equal to the number of sides of the star.

3. The power generation device according to claim 2, characterized in that, The triangular star arrangement consists of three linear generators evenly distributed in an equilateral triangle around the center of the internal combustion engine, and rigidly connected to the piston rod via triangular connecting rods.

4. The power generation device according to claim 1, characterized in that, The mover is a single-segment, double-segment, triple-segment, or multi-segment coaxial structure. The mover core is formed by winding 50WW470 non-oriented silicon steel sheets. Permanent magnets are attached to the outer circular surface of the mover, and the permanent magnets are radially magnetized.

5. The power generation device according to claim 4, characterized in that, The axial length of a single segment of the mover is 30~50mm, preferably 40mm; the permanent magnet is N52UH high temperature resistant neodymium iron boron, with a single piece size of 40mm×30mm×6mm, and 18 permanent magnets are evenly distributed in the circumference of each segment of the mover.

6. The power generation device according to claim 1, characterized in that, The stator coil is wound vertically along the axis. The axial length of a single stator segment is the sum of the mover length and the reciprocating stroke. The reciprocating stroke is 90 mm, and the axial length of a single stator segment is 120~140 mm, preferably 130 mm.

7. The power generation device according to claim 1, characterized in that, The air gap between the stator and the mover is 0.5 mm, the working frequency of the mover's reciprocating motion is 50~80 Hz, and the linear velocity of the motion is 11.7 m / s.

8. The power generation device according to claim 1, characterized in that, The single-stage moving part of a linear generator has a power output of 30kW. The total power output of a single-stage generator is 30kW, the total power output of a two-stage generator is 60kW, the total power output of a three-stage generator is 90kW, and the total power output of a multi-stage generator can be expanded to several hundred kilowatts.

9. The power generation device according to claim 1, characterized in that, A CuCrZr copper chromium zirconium sliding guide is fixed on the piston rod. The sliding guide contacts the carbon slider of the mover and provides excitation power to the mover winding.

10. The power generation device according to claim 1, characterized in that, The moving segments are rigidly connected to each other via non-magnetic flanges and 304 stainless steel moving segment connecting bushings.

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