Regenerative heat-to-work conversion equipment

Abstract

The present invention relates to the technical field of heat-to-work conversion mechanical equipment, and provides a regenerative heat-to-work conversion mechanical equipment. The regenerative heat-to-work conversion mechanical equipment includes: a mounting seat; a plurality of identical regenerative heat engines, the regenerative heat engines including a piston, a mover and a coil, the mover being fixedly connected to the piston, the coil being arranged corresponding to the mover and forming a current in the coil based on the reciprocating motion of the mover; all the regenerative heat engines are arranged in the same direction, and the forces acting on the mounting seat by the pistons of all the regenerative heat engines cancel each other out. According to an embodiment of the present invention, the regenerative heat-to-work conversion mechanical equipment is provided with a mounting seat, and all the regenerative heat engines are fixed to the mounting seat. On this basis, by rationally arranging the regenerative motors, the forces acting on the mounting seat by all the regenerative motors cancel each other out, thereby achieving the purpose of vibration reduction. Since no additional phase-modulated power supply is provided, additional increase in electrical energy consumption can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of heat-to-work conversion mechanical equipment, and in particular to heat recovery type heat-to-work conversion mechanical equipment. Background Art

[0002] Because a regenerative heat engine contains two moving components—a phase shifter and a linear motor piston—it generates vibration during operation. For example, a free-piston Stirling generator, which includes both a phase shifter and a linear motor piston, generates vibration during operation. Traditionally, two free-piston Stirling generators (generators) have been used in opposing positions to reduce system vibration.

[0003] However, in some applications, the thermal head of the generator needs to be exposed. In this case, the above-mentioned opposite placement method cannot be used to solve the vibration of the system. For this situation, there are two main traditional solutions: the first is called passive vibration reduction, which is a relatively simple method. Its principle is to install a passive vibration damper on the generator housing. The passive vibration damper uses the vibration on the housing as a drive, and its motion phase is opposite to the vibration of the housing, thereby achieving the effect of canceling the vibration. Since passive vibration reduction relies on the vibration of the housing as a drive, it cannot completely eliminate the vibration of the housing. The second solution is to add an active vibration reduction motor (hereinafter referred to as the motor) to the generator housing. The structure of the active vibration reduction motor is similar to that of the linear motor. It consumes electrical energy and controls the phase of the input current and voltage of the active vibration reduction motor at the same time, so that the motion phase of the active vibration reduction motor piston is opposite to the motion phase of the linear motor piston or the housing, and at the same time adjusts the motion amplitude of the vibration reduction motor to achieve the effect of completely canceling the vibration of the linear motor. Since the active vibration reduction motor needs to consume electrical energy and also requires an additional phase-modulated power supply, it is very inconvenient in actual application. And as the motor power increases, the vibration energy of the motor will also increase. At this time, the active vibration reduction motor consumes more and more electric energy, which is not convenient for the practical application of the motor. Therefore, it is necessary to find other vibration reduction methods. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a regenerative heat-to-work conversion mechanical device (hereinafter referred to as the device) that achieves a vibration reduction effect through a rationally arranged regenerative heat engine, achieving good vibration reduction and controlling the power input of the device.

[0005] According to the first embodiment of the present invention, a heat recovery type heat-to-work conversion mechanical device includes:

[0006] Mounting seat;

[0007] A plurality of identical regenerative heat engines, each comprising a piston, a mover, and a coil, wherein the mover is fixedly connected to the piston, the coil being disposed corresponding to the mover and generating current in the coil based on the reciprocating motion of the mover;

[0008] All the regenerative heat engines are arranged in the same direction, and the forces exerted by the pistons of all the regenerative heat engines on the mounting seat cancel each other out.

[0009] According to an embodiment of the present invention, the regenerative heat-to-work conversion mechanical device is provided with a mounting base to which all regenerative heat engines are secured. Furthermore, by rationally arranging the regenerative motors, the forces acting on the mounting base by all the regenerative motors cancel each other out, thereby achieving vibration reduction. Since no additional phase-modulated power supply is required, additional energy consumption is avoided.

[0010] According to one embodiment of the present invention, the regenerative heat engines are arranged in groups to form an even number of regenerative heat engine units, and each group of the regenerative heat engine units includes multiple regenerative heat engines; the coils of the multiple regenerative heat engines in each group of the regenerative heat engine units are connected in series and in positive connection.

[0011] According to one embodiment of the present invention, the coils of different groups of the regenerative heat generators are connected in series and reversely.

[0012] According to one embodiment of the present invention, there are four or more heat recovery heat generators, and the coils of half of the heat recovery heat generators are connected in parallel.

[0013] According to one embodiment of the present invention, at least one of the back chambers, the expansion chambers and the compression chambers of the multiple regenerative heat engines in each group of the regenerative heat engine is interconnected.

[0014] According to one embodiment of the present invention, the regenerative heat engine is a Stirling generator, and the mover is a generator mover.

[0015] According to one embodiment of the present invention, the regenerative heat engine is one of a Stirling generator, a Stirling refrigerator and a pulse tube refrigerator.

[0016] According to one embodiment of the present invention, there are two groups of the regenerative heat generator sets, and the two groups of the regenerative heat generator sets are symmetrically arranged along two diagonal lines of a set parallelogram.

[0017] According to one embodiment of the present invention, there are four or more regenerative heat generators, and all of the regenerative heat generators are symmetrically arranged along all diagonals of a set regular polygon.

[0018] According to one embodiment of the present invention, there are two groups of the recuperative heat generator sets, and the two groups of the recuperative heat generator sets are symmetrically arranged along the same straight line.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the Stirling generator;

[0022] Figure 2 It is a side view schematic diagram of one of the regenerative heat-to-work conversion mechanical devices provided in an embodiment of the present invention;

[0023] Figure 3 It is a schematic top view of one of the regenerative heat-to-work conversion mechanical devices provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of circuit connections in a regenerative heat-to-work conversion mechanical device provided by an embodiment of the present invention;

[0025] Figure 5 is a side view schematic diagram of another heat recovery type heat-to-work conversion mechanical device provided by an embodiment of the present invention;

[0026] Figure 6 is a schematic top view of another heat recovery type heat-to-work conversion mechanical device provided by an embodiment of the present invention;

[0027] Reference numerals:

[0028] 1. Thermal head; 2. High-temperature heat exchanger; 3. Regenerator; 4. Low-temperature heat exchanger; 5. Coil; 6. Piston; 7. Expansion chamber; 8. Phase modulator; 9. Compression chamber; 10. Mover; 11. Back chamber; 14. Housing; 15. Generator load. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0034] According to an embodiment of the present invention, the regenerative heat-to-work conversion mechanical device includes a mounting seat and a plurality of identical regenerative heat engines; the regenerative heat engine includes a piston 6, a mover 10 and a coil 5, the mover 10 is fixedly connected to the piston 6, the coil 5 is arranged corresponding to the mover 10 and an electric current is formed in the coil 5 based on the reciprocating motion of the mover 10; all the regenerative heat engines are arranged in the same direction, and the forces acting on the mounting seat by the piston 6 cancel each other out.

[0035] Here, "the forces exerted by the pistons 6 of all regenerative heat engines on the mounting base cancel each other out" refers to the situation where the torques acting on the mounting base can cancel each other out when all forces act on the mounting base. Since all regenerative heat engines are identical, it can be guaranteed that the forces exerted by all regenerative heat engines on the mounting base can cancel each other out.

[0036] According to an embodiment of the present invention, the regenerative heat-to-work conversion mechanical device is provided with a mounting base to which all regenerative heat engines are secured. Furthermore, by rationally arranging the regenerative motors, the forces acting on the mounting base by all the regenerative motors cancel each other out, thereby achieving vibration reduction. Since no additional phase-modulated power supply is required, additional energy consumption is avoided.

[0037] “All regenerative heat engines are arranged in the same direction” means that the regenerative heat engines are all arranged in the same direction. For example, Figure 2 and Figure 3 In the embodiment, the number of the regenerative heat engines is four, and all the regenerative heat engines are arranged longitudinally from top to bottom.

[0038] The specific form of the regenerative heat engine is not limited and may include a Stirling generator (also known as a free piston Stirling generator, hereinafter referred to as a generator), a Stirling refrigerator, a pulse tube refrigerator, etc. In a Stirling refrigerator, external electrical energy is input to drive a linear motor, thereby generating cooling.

[0039] According to the embodiment of the present invention, the structural form of the mounting base is not limited, as long as it can meet the installation requirements of all regenerative heat engines.

[0040] See Figure 1 Taking the Stirling generator as an example, the Stirling generator is a highly efficient thermal power generation technology with the characteristics of wide heat source applicability and long service life. It mainly includes a thermal head 1, a high-temperature heat exchanger 2, a regenerator 3, a low-temperature heat exchanger 4, a phase modulator 8 and a linear motor (hereinafter referred to as a motor). The linear motor mainly includes a coil 5, a mover 10 (when the regenerative heat engine is a Stirling generator, the mover is also a generator mover, such as a permanent magnet mover) and a piston 6. In addition, the Stirling generator is formed with an expansion chamber 7, a compression chamber 9 and a back chamber 11. The regenerator 3 can convert thermal energy into mechanical energy in the form of sound waves, and the linear motor converts the mechanical energy into electrical energy.

[0041] According to an embodiment of the present invention, the regenerative heat engine includes an expansion chamber 7, a compression chamber 9, a mover 10, and a coil 5. A piston 6 is provided in the compression chamber 9; the mover 10 is fixedly connected to the piston 6; the coil 5 corresponds to the mover 10, and an electric current is formed in the coil 5 based on the reciprocating motion of the mover 10. The regenerative heat engines are arranged in groups to form an even number of regenerative heat engine units, and each group of regenerative heat engine units includes multiple regenerative heat engines; the coils 5 of the multiple regenerative heat engines in each group of regenerative heat engine units are connected in series and connected in positive direction, and the coils 5 of different groups of regenerative heat engine units are connected in series and connected in reverse direction. In this case, it can be ensured that the pistons 6 of the same group of regenerative heat engines move in the same direction, while the pistons 6 of different groups of regenerative heat engines move in the opposite direction, thereby ensuring that the torque of all pistons 6 acting on the mounting seat is zero.

[0042] When the number of regenerative heat units is four, eight, or even more, other connection methods may be used between the coils of different regenerative heat units. In one embodiment, there are four or more regenerative heat units, and the coils of half of the regenerative heat units are connected in parallel. For example, when the number of regenerative heat units is four, two of the regenerative heat units are connected in parallel, and the other two are also connected in parallel. For another example, when the number of regenerative heat units is eight, four of the regenerative heat units are connected in parallel, and the other four are also connected in parallel.

[0043] See Figure 4 Multiple generators within the same group are connected in series, ensuring that the currents in the coils 5 of the generators within the group are directed in the same direction. Generators within different groups are also connected in series, but the coils 5 between the generators within the groups are reversed. This ensures that the currents in the coils 5 of the generators within the different groups are directed in opposite directions. This allows the pistons 6 and phase shifters 8 of the generators in the different groups to move in opposite directions, i.e., to be 180 degrees out of phase. Each generator group can, but is not limited to, include two generators, and the number of generator groups can, but is not limited to, two. Figure 4 In the circuit of the heat recovery type heat power conversion mechanical device, a generator load 15 is also provided.

[0044] In one embodiment, at least one of the expansion chambers 7, compression chambers 9, and back chambers 11 of the multiple regenerative heat engines in each regenerative heat engine group is interconnected, thereby enabling the moving components of the two Stirling generators in the same group to move in phase. This includes, but is not limited to, the following situations: the expansion chambers 7 of the multiple regenerative heat engines in each regenerative heat engine group are interconnected; or, the compression chambers 9 of the multiple regenerative heat engines in each regenerative heat engine group are interconnected; or, the back chambers 11 of the multiple regenerative heat engines in each regenerative heat engine group are interconnected; or, the expansion chambers 7 of the multiple regenerative heat engines in each regenerative heat engine group are interconnected, and the back chambers 11 are interconnected; or, the expansion chambers 7, compression chambers 9, and back chambers 11 of the multiple regenerative heat engines in each regenerative heat engine group are interconnected. In particular, when the regenerative heat engine is a Stirling generator, the generators in the same group can connect the expansion chambers 7 with each other, so that the moving parts of the two Stirling generators in the same group move in phase, that is, the two pistons 6 move synchronously, and the two displacers also move synchronously. When the regenerative heat engine is a Stirling refrigerator, the expansion chambers 7 of the Stirling refrigerators in the same group do not need to be connected with each other.

[0045] According to an embodiment of the present invention, see Figure 2 and Figure 3 There are two groups of heat recovery units, and the two groups of heat recovery units are symmetrically arranged along the two diagonals of the set parallelogram. Figure 3 In the embodiment, each group of the regenerative heat engine comprises two regenerative heat engines. Obviously, the number of the regenerative heat engines in each group of the regenerative heat engine can also be an even number such as four, six or eight. Figure 3 In the figure, the centers of Stirling generator 1# and Stirling generator 3# are A and B respectively, the centers of Stirling generator 2# and Stirling generator 4# are C and D respectively, and the intersection of AB and CD is H. If AH is equal to BH, and CH is equal to DH, then the torques generated by the four generators can also offset each other, thereby achieving the effect of vibration reduction and noise reduction. Figure 3 In the figure, the dots at the center A and B respectively indicate that the initial movement direction of the generator is perpendicular to the paper surface and inward, and the cross-shaped dots at the center C and D respectively indicate that the initial movement direction of the generator is perpendicular to the paper surface and outward. Figure 6 In the figure, the dot and cross point in the center of the Stirling generator also refer to the direction perpendicular to the paper, inward or outward, respectively.

[0046] Of course, there may be more than four regenerative heat generating units, and all the regenerative heat generating units may be symmetrically arranged along all diagonals of the predetermined regular polygon. In this case, the torques of all the regenerative heat generating units can also be offset.

[0047] See Figure 5 and Figure 6 According to another embodiment of the present invention, two regenerative heat generators are provided, and the two regenerative heat generators are symmetrically arranged along the same straight line. In this case, the lateral dimensions of the regenerative heat-to-power conversion mechanical device can be controlled to suit the specific application conditions.

[0048] According to an embodiment of the present invention, a regenerative heat engine further includes a high-temperature heat exchanger 2, a regenerator 3, and a low-temperature heat exchanger 4, which are connected in sequence, and a thermal head 1 for supplying heat to the high-temperature heat exchanger 2. In one embodiment, one end of the thermal head 1 is connected to the high-temperature heat exchanger 2, and the other end extends outside the expansion chamber 7. Of course, the specific structure and configuration of the thermal head 1 are not limited to the examples shown here.

[0049] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0050] Example 1

[0051] Figures 2 to 4 In the heat recovery type heat-work conversion mechanical equipment, there are four identical free piston Stirling generators, which share a rigid shell 14. The shell 14 here is also the mounting seat mentioned above. Then, the four free piston Stirling generators and the mounting seat form a vibration reduction system unit, and the four single machines are evenly distributed around the central circumference of the shell 14. The relative generators, that is, 1# and 3# are a group, and 2# and 4# are a group. The generators in the same group can connect the expansion chamber 7 gas, so that the moving parts of the two Stirling generators in the same group move in phase, that is, the two pistons 6 move synchronously, and the two displacers also move synchronously. As Figure 4 The two generators in the same group are connected in series, ensuring that the currents in the coils 5 of the two generators are in the same direction. The two generators are also connected in series, but the motors between the two groups are connected in reverse, so that the currents in the coils 5 of the two groups are in opposite directions. This allows the moving parts of the two generators to move in opposite directions, that is, the phase difference is 180 degrees.

[0052] like Figure 3 As shown, since the four generators are fixed to the same housing 14, the two groups of motors move in opposite directions with equal amplitudes, thus canceling out their forces. The centers of 1# and 3# are A and B, respectively, and the centers of 2# and 4# are C and D, respectively. The intersection of AB and CD is H. If AH equals BH, and CH equals DH, then the torques generated by the four generators can also cancel out, thereby achieving a vibration-reducing and noise-reducing effect.

[0053] When replacing the free piston Stirling generator with a Stirling refrigerator, the refrigerators only need to be connected to each other. Figure 4In the circuit connection mode, the motors in the same group of Stirling refrigerators will keep moving in phase, and the two groups will keep moving in opposite directions, which can offset the vibration, and the expansion chambers 7 of the same group of Stirling refrigerators do not need to be gas-connected.

[0054] Example 2

[0055] Figure 5 and Figure 6 This is a schematic diagram of the structure of the regenerative heat-to-power conversion mechanical device in Example 2. The regenerative heat-to-power conversion mechanical device includes four identical free-piston Stirling generators and a rigid housing 14. The four individual generators are evenly arranged in a straight line. 1# and 4# form a group, and 2# and 3# form a group. The connection method between each individual generator within their respective group and between each group is the same as in Example 1. Since the four generators are identical, their amplitudes are the same. In addition, two of the generators move in the same direction, while the other two move in opposite directions. Therefore, the resultant force acting on the common housing 14 is 0. At the same time, since 1# and 4#, and 2# and 3# move in the same direction, the distance between 1# and 2# is equal to the distance between 3# and 4#, and the resultant torque acting on the housing 14 will also be 0. Therefore, the regenerative heat-to-power conversion mechanical device composed of four individual generators can fully offset vibration and achieve a silent effect.

[0056] Since the distance between the single unit and the center point of the housing 14 (the length of the corresponding stress arm) is longer in the second embodiment, the torque generated is greater, so the rigidity and quality requirements of the housing 14 in the first embodiment are lower than those in the second embodiment.

[0057] The above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be encompassed by the scope of the claims of the present invention.

Claims

1. A heat recovery type heat-work conversion mechanical device, characterized in that: include: Mounting seat; A plurality of identical regenerative heat engines, each of which is one of a Stirling generator, a Stirling refrigerator, and a pulse tube refrigerator, each comprising a piston, a mover, and a coil, the mover being fixedly connected to the piston, the coil being disposed corresponding to the mover and generating a current in the coil based on the reciprocating motion of the mover; All the regenerative heat engines are arranged in the same direction, and the forces acting on the mounting seat by the pistons of all the regenerative heat engines cancel each other out; The regenerative heat engines are arranged in groups to form an even number of regenerative heat engine units, each group of the regenerative heat engine units includes a plurality of regenerative heat engines; the coils of the plurality of regenerative heat engines in each group of the regenerative heat engine units are connected in series and in positive connection; The coils of the different groups of regenerative heat generators are connected in series and in reverse connection; There are two groups of the regenerative heat generators, and the two groups of the regenerative heat generators are symmetrically arranged along the two diagonals of a set parallelogram, or there are four or more groups of the regenerative heat generators, and all of the regenerative heat generators are symmetrically arranged along all diagonals of a set regular polygon, or there are two groups of the regenerative heat generators, and the two groups of the regenerative heat generators are symmetrically arranged along the same straight line.

2. The heat recovery type heat-work conversion mechanical device according to claim 1, characterized in that: At least one of the back chambers, expansion chambers and compression chambers of the multiple regenerative heat engines in each group of the regenerative heat engine is connected to each other.

3. The heat recovery type heat-work conversion mechanical device according to claim 2, characterized in that: When the regenerative heat engine is a Stirling generator, the mover is a generator mover.

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