A LNG cold energy power generation device based on in-cylinder expansion

Abstract

The present invention relates to the technical field of power generation, and in particular to an LNG cold energy power generation device based on in-cylinder expansion, comprising a bracket, a Stirling generator horizontally arranged on the bracket, and a conversion device; a heat conductor arranged on one side of the Stirling generator, and the heat conductor can absorb the heat of the Stirling generator; a rotating disk rotatably arranged on one side of the Stirling generator; an initial starting device arranged on the side of the rotating disk away from the Stirling generator; a transmission device arranged on the output end of the Stirling generator; a plurality of heat transfer devices arranged, and the heat transfer devices are evenly arranged on the rotating disk around the axis of the rotating disk; a connecting pipe spirally arranged on the outside of the Stirling generator; and a speed sensor arranged on the output shaft of the Stirling generator. The present invention reduces energy loss and improves power generation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation, and in particular to an LNG cold energy power generation device based on in-cylinder expansion. Background Art

[0002] my country's import of liquefied natural gas (LNG) has increased year by year, and with it comes the problem of waste of LNG cold energy. LNG cold energy is mainly used for cold energy power generation, air separation, and cryogenic crushing, but other applications except cold energy power generation have relatively low utilization of cold energy. The Stirling engine can effectively utilize the ability generated by temperature difference and perform effective physical energy conversion, which can make better and more efficient use of cold energy that is difficult to apply, thereby saving the consumption of other energy and making great use of existing energy.

[0003] Chinese patent CN211058917U discloses a cold energy power generation device based on expansion in a cylinder, comprising a shell, a power chamber is provided at the bottom end of the shell, a first delivery chamber and a function control chamber are symmetrically provided at the top of the shell, a cryogenic pump is provided inside the first delivery chamber, a heat exchanger matched with the cryogenic pump is provided at the bottom end of the cryogenic pump, a water outlet matched with the heat exchanger is provided on the side away from the first delivery chamber, a high-pressure piston cylinder and a low-pressure piston cylinder matched with the first delivery chamber and the function control chamber are respectively provided at the bottom ends thereof, a connecting frame is provided between the high-pressure piston cylinder and the low-pressure piston cylinder, an environmental waterway matched with the function control chamber is provided on the outer wall of the connecting frame, a piston matched with the high-pressure piston cylinder and the low-pressure piston cylinder are provided inside the high-pressure piston cylinder and the low-pressure piston cylinder, a piston matched with the piston is provided at the bottom end of the piston, a power rod matched with the power chamber is provided at the bottom end of the piston rod, and a generator matched with the power rod is provided at the end of the power rod away from the power chamber.

[0004] Although the above scheme can effectively utilize cold energy, a heat exchanger, a cryogenic pump and a functional control room are used in the conversion process. The above devices all need to be powered. After the cold energy is converted into electrical energy, multiple devices in the conversion device need to be powered, which greatly reduces the conversion efficiency of electrical energy. From the Clapeyron equation PV=(m / M)RT, it can be seen that the air volume is proportional to the temperature, and the lowest temperature that LNG can reach after decompression is limited, and even absolute zero is only minus 273.15 degrees. Traditional Stirling generators are mostly driven by thermal energy. This is because under the heating of the fire source, the temperature can easily exceed 273.15 degrees, so the temperature change value will be large. If the temperature change value is too small, the Stirling generator will not be able to rotate. Summary of the invention

[0005] In view of the above problems, an LNG cold energy power generation device based on in-cylinder expansion is provided. The initial starting device adopts non-electric drive, and no electric energy consumption is generated when driving the rotating disk for initial rotation. After the speed of the Stirling generator rises to the specified speed, the speed sensor controls the transmission device to be disconnected from the initial starting device through the controller, and the Stirling generator drives the rotating disk through the transmission device. The heat transfer device arranged on the rotating disk can quickly heat up the Stirling generator, thereby improving the efficiency of heat conversion. At the same time, the heat energy of the heat transfer device is generated by the Stirling generator itself, without energy consumption, and the speed of the rotating disk and the Stirling generator after synchronous rotation will continue to increase, thereby improving the power generation efficiency.

[0006] In order to solve the problems of the prior art, an LNG cold energy power generation device based on cylinder expansion is provided, comprising a bracket, a Stirling generator horizontally arranged on the bracket and a conversion device; the conversion device comprises a heat conductor, an initial starting device, a transmission device, a rotating disk, a heat transfer device, a connecting pipe and a speed sensor; the heat conductor is arranged on one side of the Stirling generator, and the heat conductor can absorb the heat of the Stirling generator; the rotating disk is rotatably arranged on one side of the Stirling generator, and the axis of the rotating disk is perpendicular to the axis of the output shaft of the Stirling generator; the initial starting device is arranged on the side of the rotating disk away from the Stirling generator, and the initial starting device can drive the rotating disk to rotate, and the initial starting device is used by the flowing LNG as power source; a transmission device is arranged on the output end of the Stirling generator, the transmission device can make the rotating disk disconnected from the initial starting device and provide drive to the rotating disk after disconnection; a plurality of heat transfer devices are arranged, the heat transfer devices are evenly arranged on the rotating disk around the axis of the rotating disk, and the heat transfer devices can absorb heat from the heat conductor; a connecting pipe is spirally arranged on the outside of the Stirling generator, LNG is arranged in the connecting pipe, and one end of the connecting pipe is connected to the initial starting device; a speed sensor is arranged on the output shaft of the Stirling generator, the speed sensor is used to monitor the speed of the output shaft of the Stirling generator, a controller is arranged on one side of the speed sensor, and the speed sensor controls the operation of the transmission device through the controller.

[0007] Preferably, the heat transfer device includes a heat absorption shell, an arc groove, a first guide rod, a sliding block, a first spring, a limit seat and a pushing device; a plurality of arc grooves are provided, and the arc grooves are evenly opened on the rotating disk around the axis of the rotating disk; the heat absorption shell is slidably arranged in the arc groove along the axis of the rotating disk; the sliding block is arranged on one side of the heat absorption shell, and the heat absorption shell can drive the sliding block to move together when sliding; the first guide rod is an arc structure, and the first guide rod is arranged on the sliding block around the axis of the rotating disk; the limit seats are fixedly arranged at both ends of the first guide rod, and there is a first gap between the sliding block and the limit seat; the first spring is arranged in the first gap along the extension direction of the first guide rod; the pushing device is arranged on the side of the heat absorption shell away from the Stirling generator, and the pushing device can push the heat absorption shell toward the Stirling generator and wrap one side of the Stirling generator.

[0008] Preferably, the pushing device includes a guide shell, a guide groove, a protruding column and a protruding groove; the guide shell is an annular structure, and the guide shell is arranged along the axis of the rotating disk on the side of the rotating disk away from the Stirling generator; the guide groove is an arc-shaped structure, and the guide groove is arranged on the guide shell along the axis of the guide shell; the protruding groove is arranged on the guide groove, and the two ends of the protruding groove are respectively connected to the guide groove, and the protruding groove protrudes toward one side of the rotating disk along the axis of the rotating disk; the protruding column is fixedly arranged on the outer side wall of the heat absorption shell, and the protruding column and the protruding groove are slidably matched.

[0009] Preferably, the heat transfer device further comprises a protrusion and a groove; the protrusion is fixedly arranged on a side of the sliding block close to the heat absorbing shell; the groove is opened on the side wall of the heat absorbing shell along the axis of the heat absorbing shell, and the protrusion and the groove are slidably matched.

[0010] Preferably, the initial starting device includes a turbine, a first clamping block and a second clamping block; the turbine is connected to one end of a connecting pipe, and LNG flows from the turbine into the connecting pipe; the first clamping block is fixedly arranged on the output end of the turbine, and the cross-section of the first clamping block is a non-circular structure; a movable groove is provided on the rotating disk, and the cross-section of the movable groove is a non-circular structure, and the second clamping block is slidably arranged in the movable groove, and a clamping groove is provided at one end of the second clamping block close to the first clamping block, and the clamping groove can be clamped and matched with the first clamping block.

[0011] Preferably, the transmission device includes a first bevel gear, a second bevel gear, an attraction device, a first belt conveyor assembly, a second belt conveyor assembly, a second guide rod and a guide seat; the first bevel gear is fixedly arranged on the output end of the Stirling generator; the second bevel gear is arranged on one side of the first bevel gear along the axis of the rotating disk, and the first bevel gear and the second bevel gear are meshed with each other; the first belt conveyor assembly is vertically arranged on one side of the second bevel gear; the second belt conveyor assembly is arranged on the side of the rotating disk close to the first belt conveyor assembly, one end of the second belt conveyor assembly is connected to the rotating disk, and the first belt conveyor assembly drives the rotating disk to rotate through the second belt conveyor assembly; the guide seat is horizontally fixedly arranged below the second belt conveyor assembly; the attraction device is arranged on the guide seat, and the attraction device can attract the second belt conveyor assembly and make the first belt conveyor assembly approach the second belt conveyor assembly; the second guide rod is slidably arranged on the guide seat along the axis of the rotating disk, and the second guide rod provides guidance for the movement of the first belt conveyor assembly.

[0012] Preferably, the attraction device includes an electromagnet, a sliding seat, a through shaft, a receiving plate and a second spring; the electromagnet is fixedly arranged on the upper part of the guide seat, and the electromagnet has an attraction effect on the first belt conveyor assembly; the sliding seat is fixedly arranged on the lower part of the first belt conveyor assembly, and the sliding seat is slidably arranged in the guide seat along the axis of the rotating disk, the second guide rod passes through the sliding seat, the second guide rod and the sliding seat are slidably matched, and there is a second gap between the sliding seat and the guide seat, and the electromagnet can attract the sliding seat; the second spring is arranged in the second gap along the axis of the second guide rod; the through shaft is fixedly arranged on the side of the first belt conveyor assembly close to the rotating disk along the axis of the rotating disk, the through shaft passes through the second belt conveyor assembly and is slidably matched with the second belt conveyor assembly; the receiving plate is arranged at one end of the through shaft away from the first belt conveyor assembly, the second clamping block is provided with an annular groove along the axis of the rotating disk, and the receiving plate is hinged to the annular groove on the side away from the through shaft.

[0013] Preferably, the cross section through the shaft is a non-circular structure.

[0014] Preferably, the conversion device also includes a first heat insulation plate; the first heat insulation plate is arranged on the rotating disk between the arc grooves.

[0015] Preferably, the conversion device also includes a heat insulation device; the heat insulation device includes a gear ring, a first gear, a second gear and a second heat insulation plate; the gear ring is fixedly arranged on the periphery of the rotating disk along the axis of the rotating disk; the first gear is arranged on one side of the gear ring, and the first gear and the gear ring are meshed; the second gear is fixedly arranged along the axis of the first gear at one end of the first gear close to the Stirling generator, and the second gear is a toothless gear; the second heat insulation plate is slidably arranged on one side of the second gear in a vertical direction, and meshing teeth are provided on the side of the second heat insulation plate close to the second gear, and the second heat insulation plate is meshed with the second gear through the meshing teeth.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention arranges a heat conductor, an initial starting device, a transmission device, a rotating disk, a heat transfer device, a connecting pipe and a speed sensor. The initial starting device adopts a non-electric drive, and no electric energy consumption is generated when the rotating disk is driven to rotate initially. After the rotation speed of the Stirling generator rises to a specified rotation speed, the speed sensor controls the transmission device to be disconnected from the initial starting device through a controller, and the Stirling generator drives the rotating disk through the transmission device by itself. The heat transfer device arranged on the rotating disk can quickly heat up the Stirling generator, thereby improving the efficiency of heat conversion. At the same time, the heat energy of the heat transfer device is generated by the Stirling generator itself, without energy consumption, and the rotation speeds of the rotating disk and the Stirling generator after synchronous rotation will continue to increase, thereby improving the power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of an LNG cold energy power generation device based on in-cylinder expansion Figure 1 .

[0019] Figure 2 A three-dimensional diagram of an LNG cold energy power generation device based on in-cylinder expansion Figure 2 .

[0020] Figure 3 It is a three-dimensional schematic diagram of an LNG cold energy power generation device based on in-cylinder expansion with some supports removed.

[0021] Figure 4 This is a test attempt of an LNG cold energy power generation device based on in-cylinder expansion with some supports removed.

[0022] Figure 5 It is a LNG cold energy power generation device based on in-cylinder expansion Figure 4 A local enlarged schematic diagram of point A in the middle.

[0023] Figure 6 It is a three-dimensional schematic diagram of an LNG cold energy power generation device based on in-cylinder expansion with part of the propulsion device and part of the support removed.

[0024] Figure 7 It is a LNG cold energy power generation device based on in-cylinder expansion Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0025] Figure 8 It is a three-dimensional schematic diagram of an LNG cold energy power generation device based on in-cylinder expansion with the propulsion device and part of the support removed.

[0026] Fig. 9It is a LNG cold energy power generation device based on in-cylinder expansion Figure 8 A local enlarged schematic diagram of point D in the middle.

[0027] Fig.10 It is a LNG cold energy power generation device based on in-cylinder expansion Figure 8 A partial enlarged schematic diagram of point E in the middle.

[0028] Fig.11 It is a three-dimensional schematic diagram of an LNG cold energy power generation device based on in-cylinder expansion, with the connecting pipe, initial starting device, propulsion device and bracket removed.

[0029] The numbers in the figure are:

[0030] 1-bracket; 2-Stirling generator; 3-conversion device; 31-heat conducting member; 32-initial starting device; 321-turbine; 322-first clamping block; 323-second clamping block; 33-transmission device; 331-first bevel gear; 332-second bevel gear; 333-attracting device; 3331-electromagnet; 3332-sliding seat; 3333-through shaft; 3334-receiving plate; 3335-second spring; 334-first belt transmission assembly; 335-second belt transmission assembly; 336-second guide rod; 337-guide seat; 34-rotating disk; 341-first heat insulation board; 35-heat transfer device; 351-heat absorbing shell; 352-arc groove; 353-first guide rod; 354-sliding block; 3541-bump; 3542-groove; 355-first spring; 356-limiting seat; 357-pushing device; 3571-guide shell; 3572-guide groove; 3573-protruding column; 3574-protruding groove; 36-connecting pipe; 37-heat insulation device; 371-toothed ring; 372-first gear; 373-second gear; 374-second heat insulation board. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 1: An LNG cold energy power generation device based on in-cylinder expansion, comprising a bracket 1, a Stirling generator 2 horizontally arranged on the bracket 1 and a conversion device 3; the conversion device 3 comprises a heat conductor 31, an initial starting device 32, a transmission device 33, a rotating disk 34, a heat transfer device 35, a connecting pipe 36 and a speed sensor; the heat conductor 31 is arranged on one side of the Stirling generator 2, and the heat conductor 31 can absorb the heat of the Stirling generator 2; the rotating disk 34 is rotatably arranged on one side of the Stirling generator 2, and the axis of the rotating disk 34 is perpendicular to the axis of the output shaft of the Stirling generator 2; the initial starting device 32 is arranged on the side of the rotating disk 34 away from the Stirling generator 2, and the initial starting device 32 can drive the rotating disk 34 to rotate, and the initial starting device 32 uses the flowing LNG as a power source ; The transmission device 33 is arranged on the output end of the Stirling generator 2, and the transmission device 33 can make the rotating disk 34 disconnected from the initial starting device 32 and provide drive to the rotating disk 34 after disconnection; a plurality of heat transfer devices 35 are arranged, and the heat transfer devices 35 are evenly arranged on the rotating disk 34 around the axis of the rotating disk 34, and the heat transfer devices 35 can absorb the heat on the heat conductor 31; the connecting pipe 36 is spirally arranged on the outside of the Stirling generator 2, and LNG is arranged in the connecting pipe 36, and one end of the connecting pipe 36 is connected to the initial starting device 32; the speed sensor is arranged on the output shaft of the Stirling generator 2, and the speed sensor is used to monitor the output shaft speed of the Stirling generator 2. A controller is arranged on one side of the speed sensor, and the speed sensor controls the operation of the transmission device 33 through the controller.

[0033] The initial starting device 32 can provide the initial rotational force for the rotating disk 34, the heat conducting member 31 can absorb the heat generated by the Stirling generator 2 and transfer it to the heat transfer device 35, the temperature of the LNG in the connecting pipe 36 is very low, and the temperature on one side of the Stirling generator 2 can be reduced to more than minus 100 degrees. As the rotating disk 34 rotates, the heat transfer device 35 on the rotating disk 34 reaches one side of the Stirling generator 2 and isolates the connecting pipe 36 from the Stirling generator 2, the temperature around the Stirling generator 2 rises rapidly, and the contracted air in the Stirling generator 2 gradually recovers and expands. The rotating disk 34 continues to rotate, causing the heat transfer device 35 to leave the Stirling generator 2, and the connecting pipe 36 cools down the Stirling generator 2 again, thereby causing the Stirling generator 2 to rotate. The Stirling generator 2 keeps rotating, and obtains an initial speed. After the speed sensor detects that the speed of the Stirling generator 2 rises to the specified speed, the controller controls the transmission device 33 to disconnect the rotating disk 34 from the initial starting device 32, and the Stirling generator 2 controls the rotating disk 34 to rotate through the transmission device 33. The rotating disk 34 is synchronized with the speed of the Stirling generator 2 through the transmission device 33. As the speed of the Stirling generator 2 continues to increase, the rotating disk 34 connected to the Stirling generator 2 through the transmission device 33 will also increase its speed synchronously. In this way, the heat conversion efficiency at the Stirling generator 2 will continue to increase, effectively improving the power generation efficiency of the Stirling generator 2. At the same time, when the device is running, only the speed sensor needs to be powered, which greatly reduces energy loss. Of course, the speed of the Stirling generator 2 will not rise endlessly. This is because it takes a certain amount of time for the air to heat up and cool down. When the minimum and maximum temperatures are constant, the speed of the Stirling generator 2 will eventually be in a uniform state, that is, the speed of the Stirling generator 2 continues to rise, and the frequency of hot and cold conversion becomes faster. However, if the time for hot and cold conversion is too short, the temperature difference will be too small, which will cause the speed of the Stirling generator 2 to decrease. When the speed of the Stirling generator 2 drops to a certain level, the frequency of hot and cold conversion slows down, and the time for hot and cold conversion increases greatly. The speed of the Stirling generator 2 will also increase accordingly, and the Stirling generator 2 will not burn out.

[0034] Reference Figure 1 , Figure 6 and Fig.10The heat transfer device 35 includes a heat absorbing shell 351, an arc groove 352, a first guide rod 353, a sliding block 354, a first spring 355, a limit seat 356 and a pushing device 357; a plurality of arc grooves 352 are provided, and the arc grooves 352 are evenly arranged on the rotating disk 34 around the axis of the rotating disk 34; the heat absorbing shell 351 is slidably arranged in the arc groove 352 along the axis of the rotating disk 34; the sliding block 354 is arranged on one side of the heat absorbing shell 351, and when the heat absorbing shell 351 slides, it can drive the sliding block 354 to move together; the first guide rod 353 is arc-shaped -shaped structure, the first guide rod 353 is arranged on the sliding block 354 around the axis of the rotating disk 34; the limiting seats 356 are respectively fixedly arranged at both ends of the first guide rod 353, and there is a first gap between the sliding block 354 and the limiting seats 356; the first spring 355 is arranged in the first gap along the extension direction of the first guide rod 353; the pushing device 357 is arranged on the side of the heat absorption shell 351 away from the Stirling generator 2, and the pushing device 357 can push the heat absorption shell 351 toward the Stirling generator 2 and wrap one side of the Stirling generator 2.

[0035] When the rotating disk 34 drives the arc groove 352 to rotate to one side of the Stirling generator 2, the heat absorption shell 351 will also be gradually pushed out by the pushing device 357. After being pushed out, the heat absorption shell 351 gradually wraps one side of the Stirling generator 2, and the extended heat absorption shell 351 is located between the Stirling generator 2 and the connecting pipe 36, so that the Stirling generator 2 can be better heated. At this time, the rotating disk 34 is still rotating, and the heat absorption shell 351 drives the sliding block 354 to slide on the first guide rod 353, and the sliding block 354 squeezes the first spring 355. When the heat absorption shell 351 is about to reach one end of the arc groove 352, the pushing device 357 drives the heat absorption shell 351 to retract, and at the same time, the first spring 355 will also drive the heat absorption shell 351 to reset through the sliding block 354.

[0036] Reference Figure 6 , Figure 7 and Fig.10 The pushing device 357 includes a guide shell 3571, a guide groove 3572, a protruding column 3573 and a protruding groove 3574; the guide shell 3571 is an annular structure, and the guide shell 3571 is arranged along the axis of the rotating disk 34 on the side of the rotating disk 34 away from the Stirling generator 2; the guide groove 3572 is an arc-shaped structure, and the guide groove 3572 is arranged on the guide shell 3571 along the axis of the guide shell 3571; the protruding groove 3574 is arranged on the guide groove 3572, and the two ends of the protruding groove 3574 are respectively connected to the guide groove 3572, and the protruding groove 3574 protrudes toward one side of the rotating disk 34 along the axis of the rotating disk 34; the protruding column 3573 is fixedly arranged on the outer side wall of the heat absorption shell 351, and the protruding column 3573 is slidably matched with the protruding groove 3574.

[0037] When the heat absorption shell 351 is about to reach one side of the Stirling generator 2, the protruding column 3573 on the heat absorption shell 351 will slide from the guide groove 3572 to one side of the protruding groove 3574. As the protruding column 3573 slides into the protruding groove 3574, under the guidance of the protruding groove 3574, the protruding column 3573 will approach the side of the Stirling generator 2, thereby making the heat absorption shell 351 approach the Stirling generator 2. When the heat absorption shell 351 is about to reach one end of the arc groove 352, the protruding column 3573 slides out of the protruding groove 3574 and enters the guide groove 3572, thereby driving the heat absorption shell 351 to retract. It is worth noting that the inner wall of the heat absorption shell 351 and the Stirling generator 2 are clearance-matched when they are mounted together, thereby avoiding the situation that the heat absorption shell 351 cannot be accurately mounted on the Stirling generator 2 when the rotating disk 34 rotates.

[0038] Reference Fig.10 : The heat transfer device 35 also includes a protrusion 3541 and a groove 3542; the protrusion 3541 is fixedly arranged on the side of the sliding block 354 close to the heat absorption shell 351; the groove 3542 is opened on the side wall of the heat absorption shell 351 along the axis of the heat absorption shell 351, and the protrusion 3541 and the groove 3542 are slidably matched.

[0039] In order to ensure that the heat absorption shell 351 can be stably mounted on the Stirling generator 2, a protrusion 3541 is provided on the sliding block 354, so that the protrusion 3541 and the groove 3542 are slidably matched, so that the heat absorption shell 351 will not rotate when it is extended or retracted, thereby ensuring that the protruding column 3573 provided on the side wall of the heat absorption shell 351 will not slip out of the guide groove 3572 and the protruding groove 3574.

[0040] Reference Figure 1 and Figure 5 The initial starting device 32 includes a turbine 321, a first clamping block 322 and a second clamping block 323; the turbine 321 is connected to one end of a connecting pipe 36, and LNG flows from the turbine 321 into the connecting pipe 36; the first clamping block 322 is fixedly arranged on the output end of the turbine 321, and the cross-section of the first clamping block 322 is a non-circular structure; a movable groove is provided on the rotating disk 34, and the cross-section of the movable groove is a non-circular structure, and the second clamping block 323 is slidably arranged in the movable groove, and a clamping groove is provided at one end of the second clamping block 323 close to the first clamping block 322, and the clamping groove can be clamped and matched with the first clamping block 322.

[0041] When the transmission device 33 is started, the second clamping block 323 will approach the first clamping block 322, and the clamping groove on the second clamping block 323 will be clamped with the first clamping block 322. Since the turbine 321 is always running under the action of the flowing LNG, after the first clamping block 322 is clamped with the clamping groove, the second clamping block 323 can drive the rotating disk 34 to rotate.

[0042] Reference Figure 1 , Figure 3 and Figure 4 The transmission device 33 includes a first bevel gear 331, a second bevel gear 332, an attraction device 333, a first belt conveyor assembly 334, a second belt conveyor assembly 335, a second guide rod 336 and a guide seat 337; the first bevel gear 331 is fixedly arranged on the output end of the Stirling generator 2; the second bevel gear 332 is arranged on one side of the first bevel gear 331 along the axis of the rotating disk 34, and the first bevel gear 331 and the second bevel gear 332 are meshed with each other; the first belt conveyor assembly 334 is vertically arranged on one side of the second bevel gear 332; the second belt conveyor assembly 335 is arranged on one side of the rotating disk 34 close to the first belt conveyor assembly 334 On the other side, one end of the second belt conveyor assembly 335 is connected to the rotating disk 34, and the first belt conveyor assembly 334 drives the rotating disk 34 to rotate through the second belt conveyor assembly 335; the guide seat 337 is horizontally fixedly arranged below the second belt conveyor assembly 335; the attraction device 333 is arranged on the guide seat 337, and the attraction device 333 can attract the second belt conveyor assembly 335 and make the first belt conveyor assembly 334 approach the second belt conveyor assembly 335; the second guide rod 336 is slidably arranged on the guide seat 337 along the axis of the rotating disk 34, and the second guide rod 336 provides guidance for the movement of the first belt conveyor assembly 334.

[0043] The first belt conveyor assembly 334 and the second belt conveyor assembly 335 have similar structures, and both use synchronous wheels and synchronous belts to realize transmission. When the device is just started, the initial starting device 32 drives the rotating disk 34 to rotate, the first bevel gear 331 and the second bevel gear 332 are in a disengaged state, and the attraction device 333 attracts the first belt assembly. After the speed sensor detects that the speed of the Stirling generator 2 reaches the specified speed, the attraction device 333 stops running, the first belt assembly moves away from the second belt assembly, the first bevel gear 331 and the second bevel gear 332 are engaged, and when the first bevel gear 331 and the second bevel gear 332 are engaged, the second bevel gear 332 drives the first belt conveyor assembly 334 to rotate, and the first belt conveyor assembly 334 drives the second belt conveyor assembly 335 to rotate, thereby causing the rotating disk 34 to rotate. It is worth noting that no matter how the first belt conveyor assembly 334 slides, the first belt conveyor assembly 334 can drive the second belt conveyor assembly 335 to rotate.

[0044] Reference Figure 6 , Figure 8 and Fig. 9The attraction device 333 includes an electromagnet 3331, a sliding seat 3332, a through shaft 3333, a receiving plate 3334 and a second spring 3335; the electromagnet 3331 is fixedly arranged on the upper part of the guide seat 337, and the electromagnet 3331 has an attraction effect on the first belt conveyor assembly 334; the sliding seat 3332 is fixedly arranged on the lower part of the first belt conveyor assembly 334, and the sliding seat 3332 is slidably arranged in the guide seat 337 along the axis of the rotating disk 34, and the second guide rod 336 penetrates the sliding seat 3332, and the second guide rod 336 is slidably matched with the sliding seat 3332, and there is a second spring between the sliding seat 3332 and the guide seat 337 The electromagnet 3331 can attract the sliding seat 3332; the second spring 3335 is arranged in the second gap along the axis of the second guide rod 336; the through shaft 3333 is fixedly arranged on the side of the first belt conveyor assembly 334 close to the rotating disk 34 along the axis of the rotating disk 34, and the through shaft 3333 penetrates the second belt conveyor assembly 335 and slides with the second belt conveyor assembly 335; the receiving plate 3334 is arranged at one end of the through shaft 3333 away from the first belt conveyor assembly 334, and the second clamping block 323 is provided with an annular groove along the axis of the rotating disk 34, and the receiving plate 3334 is hinged to the annular groove on the side away from the through shaft 3333.

[0045] When attraction is required, the electromagnet 3331 is energized, and the sliding seat 3332 slides toward the electromagnet 3331 under the attraction of the electromagnet 3331, the second spring 3335 is stretched, and the first belt conveyor assembly 334 arranged on the sliding seat 3332 moves therewith, and the through shaft 3333 and the supporting plate 3334 also move with the first belt conveyor assembly 334. At this time, the first clamping block 322 gradually engages with the clamping groove.

[0046] Reference Fig. 9 : The cross section of the through shaft 3333 is a non-circular structure.

[0047] By setting the cross section of the through shaft 3333 to a non-circular structure, the first belt conveyor assembly 334 can drive the second belt conveyor assembly 335 through the through shaft 3333 after the first belt conveyor assembly 334 approaches the second belt conveyor assembly 335 .

[0048] Reference Fig.11 : The conversion device 3 also includes a first heat insulation plate 341; the first heat insulation plate 341 is arranged on the rotating disk 34 between the arc grooves 352.

[0049] Since the rotating disk 34 itself also has thermal conductivity, the first heat insulation plate 341 can be provided to prevent the heat of the rotating disk 34 from affecting the connecting pipe 36 , thereby ensuring that the connecting pipe 36 can cool down the Stirling generator 2 normally.

[0050] Reference Figure 6 , Figure 8 and Fig.11 : The conversion device 3 also includes a heat insulation device 37; the heat insulation device 37 includes a gear ring 371, a first gear 372, a second gear 373 and a second heat insulation plate 374; the gear ring 371 is fixedly arranged on the periphery of the rotating disk 34 along the axis of the rotating disk 34; the first gear 372 is arranged on one side of the gear ring 371, and the first gear 372 and the gear ring 371 are meshed; the second gear 373 is fixedly arranged on one end of the first gear 372 close to the Stirling generator 2 along the axis of the first gear 372, and the second gear 373 is a toothless gear; the second heat insulation plate 374 is slidably arranged on one side of the second gear 373 in the vertical direction, and the second heat insulation plate 374 is provided with meshing teeth on the side close to the second gear 373, and the second heat insulation plate 374 is meshed with the second gear 373 through the meshing teeth.

[0051] Since the first heat insulation plate 341 is arranged on the rotating disk 34, long-term use will cause the temperature of the first heat insulation plate 341 to rise, so a second heat insulation plate 374 is arranged. The second heat insulation plate 374 is slidably arranged on one side of the second gear 373 along the vertical direction, and the vertical direction is perpendicular to the horizontal plane. When the heat transfer device 35 on the rotating disk 34 reaches one side of the Stirling generator 2, the second gear 373 will drive the second heat insulation plate 374 to lift up in advance. When the heat transfer device 35 completes heating of the Stirling generator 2, the second gear 373 rotates to the missing tooth position, and the second heat insulation plate 374 automatically descends. The second heat insulation plate 374 can effectively block the heat of the first heat insulation plate 341 and the rotating disk 34. At the same time, when the second heat insulation plate 374 rises, the second heat insulation plate 374 itself can also obtain effective heat dissipation.

[0052] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An LNG cold energy power generation device based on in-cylinder expansion, comprising a support (1), a Stirling generator (2) horizontally arranged on the support (1), and a conversion device (3); It is characterized in that The conversion device (3) comprises a heat conducting member (31), an initial starting device (32), a transmission device (33), a rotating disk (34), a heat transfer device (35), a connecting pipe (36) and a rotation speed sensor; The heat conducting member (31) is arranged on one side of the Stirling generator (2), and the heat conducting member (31) can absorb the heat of the Stirling generator (2); The rotating disk (34) is rotatably arranged on one side of the Stirling generator (2), and the axis of the rotating disk (34) and the axis of the output shaft of the Stirling generator (2) are perpendicular to each other; The initial starting device (32) is arranged on a side of the rotating disk (34) away from the Stirling generator (2), the initial starting device (32) can drive the rotating disk (34) to rotate, and the initial starting device (32) uses flowing LNG as a power source; The transmission device (33) is arranged on the output end of the Stirling generator (2), and the transmission device (33) can make the rotating disk (34) disconnect from the initial starting device (32) and provide driving to the rotating disk (34) after disconnection; A plurality of heat transfer devices (35) are provided, and the heat transfer devices (35) are evenly arranged on the rotating disk (34) around the axis of the rotating disk (34). The heat transfer devices (35) can absorb heat from the heat conducting member (31); A connecting pipe (36) is spirally arranged on the outside of the Stirling generator (2), LNG is arranged in the connecting pipe (36), and one end of the connecting pipe (36) is connected to the initial starting device (32); The speed sensor is arranged on the output shaft of the Stirling generator (2), and is used to monitor the speed of the output shaft of the Stirling generator (2). A controller is arranged on one side of the speed sensor, and the speed sensor controls the operation of the transmission device (33) through the controller.

2. The LNG cold energy power generation device based on in-cylinder expansion according to claim 1 is characterized in that: The heat transfer device (35) comprises a heat absorbing shell (351), an arc-shaped groove (352), a first guide rod (353), a sliding block (354), a first spring (355), a limiting seat (356) and a pushing device (357); A plurality of arc-shaped grooves (352) are provided, and the arc-shaped grooves (352) are evenly arranged on the rotating disk (34) around the axis of the rotating disk (34); The heat absorbing shell (351) is slidably disposed in the arc groove (352) along the axis of the rotating disk (34); The sliding block (354) is arranged on one side of the heat absorbing shell (351), and when the heat absorbing shell (351) slides, it can drive the sliding block (354) to move together; The first guide rod (353) is in an arc-shaped structure, and the first guide rod (353) is arranged around the axis of the rotating disk (34) and penetrates the sliding block (354); The limiting seats (356) are respectively fixedly arranged at the two ends of the first guide rod (353), and a first gap exists between the sliding block (354) and the limiting seats (356); The first spring (355) is arranged in the first gap along the extension direction of the first guide rod (353); The pushing device (357) is arranged on a side of the heat absorbing shell (351) away from the Stirling generator (2). The pushing device (357) can push the heat absorbing shell (351) toward the Stirling generator (2) and wrap one side of the Stirling generator (2).

3. The LNG cold energy power generation device based on in-cylinder expansion according to claim 2 is characterized in that: The pushing device (357) includes a guide shell (3571), a guide groove (3572), a protruding column (3573) and a protruding groove (3574); The guide shell (3571) is annular in structure, and is arranged along the axis of the rotating disk (34) on a side of the rotating disk (34) away from the Stirling generator (2); The guide groove (3572) is an arc-shaped structure, and the guide groove (3572) is arranged on the guide shell (3571) along the axis of the guide shell (3571); The protruding groove (3574) is arranged on the guide groove (3572), and both ends of the protruding groove (3574) are respectively connected to the guide groove (3572), and the protruding groove (3574) protrudes toward one side of the rotating disk (34) along the axis of the rotating disk (34); The protruding column (3573) is fixedly arranged on the outer side wall of the heat absorbing shell (351), and the protruding column (3573) is slidably matched with the protruding groove (3574).

4. The LNG cold energy power generation device based on in-cylinder expansion according to claim 2 is characterized in that: The heat transfer device (35) further includes a protrusion (3541) and a groove (3542); The protrusion (3541) is fixedly arranged on a side of the sliding block (354) close to the heat absorbing shell (351); The groove (3542) is opened on the side wall of the heat absorbing shell (351) along the axis of the heat absorbing shell (351), and the protrusion (3541) and the groove (3542) are slidably matched.

5. The LNG cold energy power generation device based on in-cylinder expansion according to claim 1 is characterized in that: The initial starting device (32) comprises a turbine (321), a first clamping block (322) and a second clamping block (323); The turbine (321) is connected to one end of the connecting pipe (36), and the LNG flows from the turbine (321) into the connecting pipe (36); The first clamping block (322) is fixedly arranged on the output end of the turbine (321), and the cross section of the first clamping block (322) is a non-circular structure; A movable groove is provided on the rotating disk (34), and the cross section of the movable groove is a non-circular structure. The second clamping block (323) is slidably arranged in the movable groove. An end of the second clamping block (323) close to the first clamping block (322) is provided with a clamping groove, and the clamping groove can be clamped and matched with the first clamping block (322).

6. The LNG cold energy power generation device based on in-cylinder expansion according to claim 5 is characterized in that: The transmission device (33) comprises a first bevel gear (331), a second bevel gear (332), an attraction device (333), a first belt transmission assembly (334), a second belt transmission assembly (335), a second guide rod (336) and a guide seat (337); The first bevel gear (331) is fixedly arranged on the output end of the Stirling generator (2); The second bevel gear (332) is arranged on one side of the first bevel gear (331) along the axis of the rotating disk (34), and the first bevel gear (331) and the second bevel gear (332) are meshed with each other; The first belt transmission assembly (334) is vertically arranged on one side of the second bevel gear (332); The second belt conveyor assembly (335) is arranged on a side of the rotating disk (34) close to the first belt conveyor assembly (334), one end of the second belt conveyor assembly (335) is connected to the rotating disk (34), and the first belt conveyor assembly (334) drives the rotating disk (34) to rotate through the second belt conveyor assembly (335); The guide seat (337) is horizontally fixedly arranged below the second belt conveyor assembly (335); The suction device (333) is arranged on the guide seat (337), and the suction device (333) can attract the second belt conveyor assembly (335) and make the first belt conveyor assembly (334) approach the second belt conveyor assembly (335); The second guide rod (336) is slidably arranged on the guide seat (337) along the axis of the rotating disk (34), and the second guide rod (336) provides guidance for the movement of the first belt conveyor assembly (334).

7. The LNG cold energy power generation device based on in-cylinder expansion according to claim 6 is characterized in that: The attraction device (333) includes an electromagnet (3331), a sliding seat (3332), a through shaft (3333), a receiving plate (3334) and a second spring (3335); The electromagnet (3331) is fixedly arranged on the upper part of the guide seat (337), and the electromagnet (3331) has an attraction effect on the first belt conveyor assembly (334); The sliding seat (3332) is fixedly arranged at the lower part of the first belt conveyor assembly (334), the sliding seat (3332) is slidably arranged in the guide seat (337) along the axis of the rotating disk (34), the second guide rod (336) penetrates the sliding seat (3332), the second guide rod (336) and the sliding seat (3332) are slidably matched, a second gap exists between the sliding seat (3332) and the guide seat (337), and the electromagnet (3331) can attract the sliding seat (3332); The second spring (3335) is arranged in the second gap along the axis of the second guide rod (336); The through shaft (3333) is fixedly arranged on a side of the first belt conveyor assembly (334) close to the rotating disk (34) along the axis of the rotating disk (34); the through shaft (3333) penetrates the second belt conveyor assembly (335) and is slidably matched with the second belt conveyor assembly (335); The receiving plate (3334) is arranged at one end of the through-shaft (3333) away from the first belt conveyor assembly (334); the second clamping block (323) is provided with an annular groove along the axis of the rotating disk (34); and the side of the receiving plate (3334) away from the through-shaft (3333) is hinged to the annular groove.

8. The LNG cold energy power generation device based on in-cylinder expansion according to claim 7 is characterized in that: The cross section of the through shaft (3333) is a non-circular structure.

9. The LNG cold energy power generation device based on in-cylinder expansion according to claim 2 is characterized in that: The conversion device (3) further comprises a first heat insulation board (341); The first heat insulation plate (341) is arranged on the rotating disk (34) between the arc-shaped grooves (352).

10. The LNG cold energy power generation device based on in-cylinder expansion according to claim 9, characterized in that: The conversion device (3) further comprises a heat insulation device (37); the heat insulation device (37) comprises a gear ring (371), a first gear (372), a second gear (373) and a second heat insulation plate (374); The gear ring (371) is fixedly arranged on the periphery of the rotating disk (34) along the axis of the rotating disk (34); The first gear (372) is arranged on one side of the gear ring (371), and the first gear (372) and the gear ring (371) are meshed; The second gear (373) is fixedly arranged along the axis of the first gear (372) at one end of the first gear (372) close to the Stirling generator (2), and the second gear (373) is a toothless gear; The second heat insulation plate (374) is slidably arranged on one side of the second gear (373) in the vertical direction. The second heat insulation plate (374) is provided with meshing teeth on one side close to the second gear (373). The second heat insulation plate (374) meshes with the second gear (373) through the meshing teeth.

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