Teaching and practical training device for hydrogen fuel conveying system of new energy automobile

Abstract

The invention discloses a new energy automobile hydrogen fuel conveying system teaching practical training device, which relates to the field of teaching aids, and comprises a bottom support, a storage battery arranged on one side of the bottom support, a hydrogen storage tank arranged on one side of the top of the bottom support, a hydrogen fuel cell stack arranged in the middle of the top of the bottom support, and a support unit, the support unit is arranged on one side of the bottom support and comprises a transverse driving unit arranged on one side of the bottom support. According to the new energy automobile hydrogen fuel conveying system teaching practical training device, through cooperative control of the transverse driving unit and the piston unit, dynamic compensation of the pressure in the hydrogen storage tank is achieved, when the air pressure is lower than a 3 MPa threshold value, the transverse driving unit is automatically started, a first piston and a second piston form a stepped compression cavity, and the pressure in the hydrogen storage tank is reduced. The compression stroke is accurately adjusted under the cooperation of the limiting ring and the damping unit, and it is ensured that the air supply pressure is always stabilized in the fuel cell stack working interval.

Description

Technical Field

[0001] The present invention relates to teaching aid technology, and in particular to a teaching and training device for a hydrogen fuel delivery system of a new energy vehicle. Background Art

[0002] Hydrogen fuel cell vehicles are a key component of the new energy vehicle sector. They use hydrogen as their primary energy source, replacing the gasoline or diesel used in traditional fuel vehicles. Their core component is the fuel cell, a power generation device that directly converts the chemical energy of hydrogen and oxygen into electricity. This electrochemical reaction generates electricity, which powers the vehicle's electric motor, thereby driving the vehicle. Throughout this process, hydrogen fuel cell vehicles achieve zero or low emissions, making them more environmentally friendly.

[0003] The operating principles of hydrogen fuel cell vehicles are primarily divided into three stages: hydrogen storage and delivery, chemical reactions in the fuel cell, and electric motor drive. First, hydrogen is stored in the vehicle's high-pressure gas tank. When needed, it is delivered to the fuel cell via the hydrogen fuel delivery system. Simultaneously, oxygen is drawn from the air into the fuel cell. Inside the fuel cell, hydrogen and oxygen undergo an electrochemical reaction under the action of a catalyst. Hydrogen atoms lose electrons, becoming hydrogen ions. These ions then travel through the proton exchange membrane to the cathode, while the electrons flow through an external circuit to form an electric current, generating electricity. This generated electricity is then fed into the vehicle's electric motor, which converts it into mechanical energy, driving the wheels and enabling the vehicle to move.

[0004] With the rapid development of hydrogen fuel cell technology, the importance of hydrogen energy vehicle teaching and training devices in vocational education has become increasingly prominent. Existing teaching devices mostly use static hydrogen storage and direct gas supply mode, which has the following technical defects:

[0005] When the pressure of hydrogen in the hydrogen storage tank gradually decreases during practical training, the hydrogen pressure in the hydrogen storage tank is required to be no less than three MPa. When it is lower than this pressure, there is a risk of external impurities entering the hydrogen storage tank. During practical training, it is only necessary to demonstrate the basic principles. In addition, there is a risk of leakage of high-pressure hydrogen, and the amount of hydrogen injected into the hydrogen storage tank needs to be strictly controlled. Therefore, only a small amount of hydrogen needs to be injected to meet the needs of practical training. Therefore, when there are many students or the training time is long, the pressure of the hydrogen in the hydrogen storage tank may drop below three MPa during use, and low pressure will also cause insufficient reaction in the hydrogen fuel cell stack, affecting students' learning experience. Summary of the Invention

[0006] The purpose of the present invention is to provide a teaching and training device for a new energy vehicle hydrogen fuel delivery system to address the above-mentioned deficiencies in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a teaching and training device for a hydrogen fuel delivery system for a new energy vehicle, comprising a bottom bracket, a battery disposed on one side of the bottom bracket, a hydrogen storage tank disposed on one side of the top of the bottom bracket, and a hydrogen fuel cell stack disposed in the middle of the top of the bottom bracket, and further comprising:

[0008] The bracket unit is provided on one side of the bottom bracket, and the bracket unit includes:

[0009] a lateral drive unit, which is arranged on one side of the bottom bracket;

[0010] A strip plate is provided on one side of the transverse driving unit, and the transverse driving unit is used to drive the strip plate to move along its own axial direction;

[0011] The compression unit is arranged on a side of the strip plate close to the hydrogen storage tank, and comprises:

[0012] A transmission rod unit is provided on a side of the strip plate close to the hydrogen storage tank, and the transmission rod unit is partially on and located inside the hydrogen storage tank;

[0013] A piston unit is provided on one side of the transmission rod unit, wherein the outer side of the piston unit is slidably connected to the inner wall of the hydrogen storage tank, and the piston unit is used to compress the hydrogen stored in the inner cavity of the hydrogen storage tank;

[0014] A limiting ring is fixedly installed on the inner side of the hydrogen storage tank and is used to limit the movement stroke of the piston unit.

[0015] Furthermore, a top bracket is symmetrically fixedly installed on the top of the bottom bracket, and the two top brackets are fixedly connected to the outside of the hydrogen fuel cell stack.

[0016] Furthermore, one side of the top bracket is connected to a driving unit, and the driving unit includes:

[0017] A driving source is fixedly mounted on one side of the top bracket;

[0018] A threaded rod is fixedly mounted on the output end of the driving source via a coupling, the other end of the threaded rod penetrates the strip plate, and the outer side of the threaded rod is threadedly connected to the strip plate at the penetration point;

[0019] The track is fixedly installed on one side of the top bracket and located on one side of the threaded rod. The other end of the track passes through the strip plate, and the outer side of the track is slidably connected to the strip plate at the penetration point.

[0020] Furthermore, the transmission rod unit includes:

[0021] A hollow rod is fixedly mounted on one side of the strip plate, the other end of the hollow rod passes through the hydrogen storage tank, and the outer side of the hollow rod is slidably connected to the hydrogen storage tank at the penetration point;

[0022] A round rod is slidably mounted inside the hollow rod, with the other end of the round rod being located inside the hydrogen storage tank;

[0023] The damping unit is arranged inside the hollow rod, with one end of the damping unit abutting against one end of the inner side of the hollow rod, and the other end of the damping unit abutting against the end of the round rod located in the inner cavity of the hollow rod.

[0024] Furthermore, the piston unit comprises:

[0025] A first piston is fixedly mounted on the hollow rod and is located at one end of the inner cavity of the hydrogen storage tank, wherein the outer side of the first piston is slidably connected to the inner wall of the hydrogen storage tank;

[0026] A second piston is fixedly mounted on the round rod and is located at one end of the inner cavity of the hydrogen storage tank. The outer side of the second piston is slidably connected to the inner cavity of the hydrogen storage tank. The second piston is provided with a plurality of through holes in a circular array around its own axis.

[0027] A plurality of one-way pieces are respectively arranged on a side of the second piston away from the first piston and located on one side of the through hole. The one-way pieces are used to block the through hole.

[0028] Furthermore, the one-way member includes:

[0029] Two ear plates are symmetrically fixedly mounted on a side of the second piston away from the first piston, and the ear plates are located outside the through hole;

[0030] A rotating shaft, which is fixedly installed between the two ear plates;

[0031] A blocking plate is provided on a side of the second piston away from the first piston, the blocking plate covers the outside of the through hole, the blocking plate is partially located between the two ear plates, the blocking plate is penetrated by the rotating shaft, and the outer side of the rotating shaft is rotatably connected to the penetration point of the blocking plate;

[0032] Two torsion springs are sleeved on the outside of the rotating shaft. The torsion springs are located between the ear plate and the blocking plate. One end of the torsion spring is fixedly connected to the ear plate, and the other end of the torsion spring is fixedly connected to one side of the blocking plate.

[0033] Furthermore, a charging valve is fixedly installed on the outside of the hydrogen storage tank.

[0034] Furthermore, a connector is fixedly installed on the other end of the hydrogen storage tank, a hydrogen supply pipe is fixedly installed on the other end of the connector, the other end of the hydrogen supply pipe is fixedly connected to one side of the hydrogen fuel cell stack, an air supply pipe is also fixedly connected to the hydrogen fuel cell stack, and a heat dissipation unit is fixedly installed on the top of the hydrogen fuel cell stack.

[0035] Compared with the existing technology, the teaching and training device of the new energy vehicle hydrogen fuel delivery system provided by the present invention has the following effects:

[0036] Dynamic compensation of the pressure in the hydrogen storage tank is achieved through the coordinated control of the transverse drive unit and the piston unit. When the gas pressure falls below the 3MPa threshold, the transverse drive unit automatically starts, and the first and second pistons form a stepped compression chamber. The compression stroke is precisely adjusted with the cooperation of the limit ring and the damping unit to ensure that the gas supply pressure is always stable.

[0037] The one-way component ensures the directional flow of hydrogen during the compression process and can automatically relieve pressure when the pressure is abnormally high; the piston unit also separates the inner cavity of the hydrogen storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0039] Figure 1 A first schematic diagram of the overall structure provided by an embodiment of the present invention;

[0040] Figure 2 A second schematic diagram of the overall structure provided by an embodiment of the present invention;

[0041] Figure 3 A first schematic diagram of a partial cross-section of the overall structure provided by an embodiment of the present invention;

[0042] Figure 4 A second schematic diagram of a partial cross-section of the overall structure provided by an embodiment of the present invention;

[0043] Figure 5 A schematic diagram of the one-way member structure provided by an embodiment of the present invention;

[0044] Figure 6 This is a third schematic diagram of a partial cross-section of the overall structure provided by an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 1. Bottom unit; 11. Bottom bracket; 12. Top bracket; 13. Battery; 2. Hydrogen supply unit; 21. Hydrogen storage tank; 22. Connector; 23. Hydrogen supply pipeline; 3. Hydrogen fuel cell stack; 4. Heat dissipation unit; 5. Air supply pipe; 6. Bracket unit; 61. Strip plate; 62. Track; 63. Threaded rod; 64. Drive source; 7. Compression unit; 71. Hollow rod; 72. First piston; 73. Round rod; 74. Second piston; 75. Limiting ring; 76. One-way member; 761. Sealing plate; 762. Ear plate; 763. Torsion spring; 764. Rotating shaft; 77. Damping unit; 8. Inflation valve. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] Example 1:

[0049] See also Figures 1-6 A teaching and training device for a hydrogen fuel delivery system for a new energy vehicle includes a bottom bracket 11, a battery 13 is provided on one side of the bottom bracket 11, a hydrogen storage tank 21 is provided on one side of the top of the bottom bracket 11, and a hydrogen fuel cell stack 3 is provided in the middle of the top of the bottom bracket 11. The device also includes:

[0050] The bracket unit 6 is provided on one side of the bottom bracket 11 and includes:

[0051] A lateral drive unit, which is provided on one side of the bottom bracket 11;

[0052] The strip plate 61 is provided on one side of the transverse driving unit, and the transverse driving unit is used to drive the strip plate 61 to move along its own axial direction;

[0053] The compression unit 7 is provided on one side of the strip plate 61 close to the hydrogen storage tank 21 and includes:

[0054] The transmission rod unit is provided on one side of the strip plate 61 close to the hydrogen storage tank 21 and is located on the transmission rod unit portion and inside the hydrogen storage tank 21;

[0055] The piston unit is provided on one side of the transmission rod unit. The outer side of the piston unit is slidably connected to the inner wall of the hydrogen storage tank 21. The piston unit is used to compress the hydrogen stored in the inner cavity of the hydrogen storage tank 21.

[0056] The limiting ring 75 is fixedly installed on the inner side of the hydrogen storage tank 21 and is used to limit the movement stroke of the piston unit.

[0057] The bottom bracket 11 serves as a supporting platform for the device. The inner side of the bottom bracket 11 is used to fix the battery 13. The hydrogen stored in the hydrogen storage tank 21 reacts in the hydrogen fuel cell stack 3 to generate electricity, and the generated electricity is stored in the battery 13. The transverse drive unit is used to drive the strip plate 61 to drive the transmission rod unit to move. The transmission rod unit drives the piston unit to move to compress the hydrogen in the hydrogen storage tank 21 to ensure the stability of the hydrogen supply pressure. The limit ring 75 is used to limit the stroke of the piston unit.

[0058] A top bracket 12 is symmetrically fixedly installed on the top of the bottom bracket 11 , and the two top brackets 12 are fixedly connected to the outside of the hydrogen fuel cell stack 3 .

[0059] The top bracket 12 is used to fix the hydrogen fuel cell stack 3 and provide protection for the hydrogen fuel cell stack 3. The bottom bracket 11, the top bracket 12 and the battery 13 constitute the bottom unit 1, which serves as the bottom support base of the device.

[0060] One side of the top bracket 12 is connected to the drive unit, which includes:

[0061] A driving source 64 is fixedly mounted on one side of the top bracket 12;

[0062] The threaded rod 63 is fixedly mounted on the output end of the driving source 64 via a coupling. The other end of the threaded rod 63 passes through the strip plate 61. The outer side of the threaded rod 63 is threadedly connected to the strip plate 61 at the point where it passes through.

[0063] The track 62 is fixedly mounted on one side of the top bracket 12 and is located on one side of the threaded rod 63 . The other end of the track 62 passes through the strip plate 61 , and the outer side of the track 62 is slidably connected to the strip plate 61 at the point where the track 62 passes through.

[0064] The track 62 supports the movement of the strip plate 61 and enables the strip plate 61 to move only along the track 62. The driving source 64 includes but is not limited to a stepper motor, which is electrically connected to an external power supply and is also controlled by an external PLC programming program. The driving source 64 drives the threaded rod 63 to rotate, and the strip plate 61 threadedly connected to the threaded rod 63 moves along the track 62.

[0065] The transmission rod unit consists of:

[0066] A hollow rod 71 is fixedly mounted on one side of the strip plate 61. The other end of the hollow rod 71 penetrates the hydrogen storage tank 21. The outer side of the hollow rod 71 is slidably connected to the hydrogen storage tank 21 at the penetration point.

[0067] A round rod 73 is slidably mounted on the inner side of the hollow rod 71 , with the other end of the round rod 73 located on the inner side of the hydrogen storage tank 21 ;

[0068] The damping unit 77 is disposed inside the hollow rod 71 , with one end of the damping unit 77 abutting against one end of the inner side of the hollow rod 71 , and the other end of the damping unit 77 abutting against the end of the round rod 73 located in the inner cavity of the hollow rod 71 .

[0069] The hollow rod 71 is a metal rod, one end of which is welded to one side of the strip plate 61. The hollow rod 71 moves along with the movement of the strip plate 61. The hollow rod 71 uses the damping unit 77 to ensure that the round rod 73 always remains extended from the hollow rod 71. The damping unit 77 includes but is not limited to a damping spring.

[0070] The piston unit consists of:

[0071] A first piston 72 is fixedly mounted on the hollow rod 71 and is located at one end of the inner cavity of the hydrogen storage tank 21. The outer side of the first piston 72 is slidably connected to the inner wall of the hydrogen storage tank 21;

[0072] The second piston 74 is fixedly mounted on the round rod 73 and is located at one end of the inner cavity of the hydrogen storage tank 21. The outer side of the second piston 74 is slidably connected to the inner cavity of the hydrogen storage tank 21. The second piston 74 is provided with a plurality of through holes in a circular array around its own axis.

[0073] A plurality of one-way members 76 are respectively disposed on a side of the second piston 74 away from the first piston 72 and located on one side of the through hole. The one-way members 76 are used to block the through hole.

[0074] The first piston 72 moves under the drive of the hollow rod 71, and the second piston 74 moves under the drive of the round rod 73. When the pressure of the hydrogen in the hydrogen storage tank 21 gradually decreases during the practical training, the hydrogen pressure in the hydrogen storage tank 21 is required to be not less than three MPa. When it is lower than this pressure, there is a risk of external impurities entering the hydrogen storage tank 21. During the practical training, it is only necessary to demonstrate the basic principles. In addition, there is a risk of leakage of high-pressure hydrogen, and the amount of hydrogen injected into the hydrogen storage tank 21 needs to be strictly controlled. Therefore, the amount of hydrogen injected into the hydrogen storage tank 21 is small and only needs to meet the needs of practical training. Therefore, when there are many students or the practical training time is long, the hydrogen in the hydrogen storage tank 21 is During use, the pressure may drop below three MPa, and low pressure will also cause insufficient reaction in the hydrogen fuel cell stack 3, affecting students' learning experience. When the hydrogen pressure in the hydrogen storage tank 21 is reduced, either hydrogen is directly replenished or the hydrogen in the hydrogen storage tank 21 is compressed so that the hydrogen outlet always maintains sufficient output pressure. When the hydrogen in the hydrogen storage tank 21 is compressed, the strip plate 61 drives the first piston 72 at the end of the hollow rod 71 and the second piston 74 at the end of the round rod 73 to move synchronously to compress the hydrogen in the hydrogen storage tank 21. The one-way member 76 can make the hydrogen on one side of the first piston 72 move toward the side of the second piston 74 to maintain the stability of the hydrogen pressure on both sides.

[0075] The one-way member 76 includes:

[0076] Two ear plates 762 are symmetrically fixedly mounted on a side of the second piston 74 away from the first piston 72, and the ear plates 762 are located outside the through hole;

[0077] A rotating shaft 764 is fixedly mounted between the two ear plates 762;

[0078] The blocking plate 761 is disposed on the side of the second piston 74 away from the first piston 72. The blocking plate 761 covers the outside of the through hole. The blocking plate 761 is partially located between the two ear plates 762. The blocking plate 761 is penetrated by the rotating shaft 764. The outer side of the rotating shaft 764 is rotatably connected to the penetration point of the blocking plate 761.

[0079] Two torsion springs 763 are sleeved on the outside of the rotating shaft 764. The torsion springs 763 are located between the ear plate 762 and the blocking plate 761. One end of the torsion spring 763 is fixedly connected to the ear plate 762, and the other end of the torsion spring 763 is fixedly connected to one side of the blocking plate 761.

[0080] The one-way member 76 is used to block the through hole. When the hydrogen pressure on the side of the second piston 74 away from the first piston 72 is low, the sealing plate 761 overcomes the torsion of the torsion spring 763 under the action of the gas pressure difference on both sides. The sealing plate 761 rotates around the axis of the rotating shaft 764 to connect the two sides and balance the hydrogen pressure. When the second piston 74 contacts the limit ring 75, the round rod 73 no longer moves, and the hollow rod 71 overcomes the resistance of the damping unit 77, allowing the hydrogen between the first piston 72 and the second piston 74 to enter the other side of the second piston 74, maintaining the hydrogen pressure on the gas transmission side.

[0081] A charging valve 8 is fixedly installed on the outside of the hydrogen storage tank 21 .

[0082] Hydrogen is filled into the hydrogen storage tank 21 through the charging valve 8 .

[0083] A connector 22 is fixedly installed at the other end of the hydrogen storage tank 21, and a hydrogen supply pipe 23 is fixedly installed at the other end of the connector 22. The other end of the hydrogen supply pipe 23 is fixedly connected to one side of the hydrogen fuel cell stack 3. An air supply pipe 5 is also fixedly connected to the hydrogen fuel cell stack 3, and a heat dissipation unit 4 is fixedly installed on the top of the hydrogen fuel cell stack 3.

[0084] The hydrogen storage tank 21, the connector 22 and the hydrogen supply pipe 23 together constitute the hydrogen supply unit 2. The hydrogen supply unit 2 is used to inject hydrogen into the hydrogen fuel cell stack 3. The hydrogen supply pipe 23 is used to inject hydrogen into the hydrogen fuel cell stack 3. The air supply pipe 5 is used to inject air into the hydrogen fuel cell stack 3. The heat dissipation unit 4 includes but is not limited to an electric fan, which is electrically connected to an external power supply and is controlled by an external PLC programming program. The heat dissipation unit 4 is used to dissipate heat for the hydrogen fuel cell stack 3.

[0085] In this embodiment, the driving unit is an electric telescopic rod, one end of which is fixedly connected to the top bracket 12, and the other end of which is fixedly connected to the strip plate 61. The electric telescopic rod is electrically connected to an external power supply and is also controlled by an external PLC programming program. The electric telescopic rod adjusts the position of the strip plate 61 by its own extension and contraction.

[0086] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A teaching and training device for a new energy vehicle hydrogen fuel delivery system, comprising a bottom bracket (11), a battery (13) disposed on one side of the bottom bracket (11), a hydrogen storage tank (21) disposed on one side of the top of the bottom bracket (11), and a hydrogen fuel cell stack (3) disposed in the middle of the top of the bottom bracket (11), characterized in that: Also includes: A bracket unit (6) is provided on one side of the bottom bracket (11), and the bracket unit (6) comprises: A lateral drive unit, which is arranged on one side of the bottom bracket (11); A strip plate (61) is arranged on one side of the transverse driving unit, and the transverse driving unit is used to drive the strip plate (61) to move along its own axial direction; The compression unit (7) is arranged on a side of the strip plate (61) close to the hydrogen storage tank (21), and the compression unit (7) includes: A transmission rod unit is provided on a side of the strip plate (61) close to the hydrogen storage tank (21), and the transmission rod unit is partially located on and inside the hydrogen storage tank (21); A piston unit is provided on one side of the transmission rod unit, the outer side of the piston unit being slidably connected to the inner wall of the hydrogen storage tank (21), and the piston unit is used to compress the hydrogen stored in the inner cavity of the hydrogen storage tank (21); A limiting ring (75) is fixedly installed on the inner side of the hydrogen storage tank (21), and the limiting ring (75) is used to limit the moving stroke of the piston unit.

2. A teaching and training device for a new energy vehicle hydrogen fuel delivery system according to claim 1, characterized in that: A top bracket (12) is symmetrically fixedly mounted on the top of the bottom bracket (11), and the two top brackets (12) are fixedly connected to the outside of the hydrogen fuel cell stack (3).

3. A teaching and training device for a new energy vehicle hydrogen fuel delivery system according to claim 2, characterized in that: One side of the top bracket (12) is connected to a driving unit, and the driving unit comprises: A driving source (64) is fixedly mounted on one side of the top bracket (12); A threaded rod (63) is fixedly mounted on the output end of the driving source (64) via a coupling, the other end of the threaded rod (63) passes through the strip plate (61), and the outer side of the threaded rod (63) is threadedly connected to the strip plate (61) at the point where the threaded rod (63) passes through; The track (62) is fixedly mounted on one side of the top bracket (12) and is located on one side of the threaded rod (63). The other end of the track (62) passes through the strip plate (61). The outer side of the track (62) is slidably connected to the strip plate (61) at the point where the track (62) passes through.

4. A teaching and training device for a new energy vehicle hydrogen fuel delivery system according to claim 3, characterized in that: The transmission rod unit comprises: A hollow rod (71) is fixedly mounted on one side of the strip plate (61), the other end of the hollow rod (71) penetrates the hydrogen storage tank (21), and the outer side of the hollow rod (71) is slidably connected to the penetration portion of the hydrogen storage tank (21); A round rod (73) is slidably mounted inside the hollow rod (71), and the other end of the round rod (73) is located inside the hydrogen storage tank (21); A damping unit (77) is arranged inside the hollow rod (71), one end of the damping unit (77) abuts against one end of the inner side of the hollow rod (71), and the other end of the damping unit (77) abuts against the end of the round rod (73) located in the inner cavity of the hollow rod (71).

5. A teaching and training device for a new energy vehicle hydrogen fuel delivery system according to claim 4, characterized in that: The piston unit comprises: A first piston (72) is fixedly mounted on the hollow rod (71) and is located at one end of the inner cavity of the hydrogen storage tank (21), wherein the outer side of the first piston (72) is slidably connected to the inner wall of the hydrogen storage tank (21); A second piston (74) is fixedly mounted on the round rod (73) and is located at one end of the inner cavity of the hydrogen storage tank (21). The outer side of the second piston (74) is slidably connected to the inner cavity of the hydrogen storage tank (21). The second piston (74) is provided with a plurality of through holes in a circular array around its own axis. A plurality of one-way members (76) are respectively arranged on a side of the second piston (74) away from the first piston (72) and located on one side of the through hole. The one-way members (76) are used to block the through hole.

6. A teaching and training device for a new energy vehicle hydrogen fuel delivery system according to claim 5, characterized in that: The one-way member (76) includes: Two ear plates (762) are symmetrically fixedly mounted on a side of the second piston (74) away from the first piston (72), and the ear plates (762) are located outside the through hole; A rotating shaft (764) is fixedly mounted between the two ear plates (762); A blocking plate (761) is provided on a side of the second piston (74) away from the first piston (72), the blocking plate (761) covers the outside of the through hole, the blocking plate (761) is partially located between the two ear plates (762), the blocking plate (761) is penetrated by the rotating shaft (764), and the outside of the rotating shaft (764) is rotatably connected to the penetration point of the blocking plate (761); Two torsion springs (763) are sleeved on the outside of the rotating shaft (764). The torsion springs (763) are located between the ear plate (762) and the blocking plate (761). One end of the torsion spring (763) is fixedly connected to the ear plate (762), and the other end of the torsion spring (763) is fixedly connected to one side of the blocking plate (761).

7. The teaching and training device for a new energy vehicle hydrogen fuel delivery system according to claim 1 is characterized in that: An air charging valve (8) is fixedly mounted on the outside of the hydrogen storage tank (21).

8. The teaching and training device for a new energy vehicle hydrogen fuel delivery system according to claim 1 is characterized in that: A connector (22) is fixedly mounted on the other end of the hydrogen storage tank (21), a hydrogen supply pipe (23) is fixedly mounted on the other end of the connector (22), the other end of the hydrogen supply pipe (23) is fixedly connected to one side of the hydrogen fuel cell stack (3), an air supply pipe (5) is also fixedly connected to the hydrogen fuel cell stack (3), and a heat dissipation unit (4) is fixedly mounted on the top of the hydrogen fuel cell stack (3).

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