Liquid hydrogen booster pump

Abstract

The present disclosure relates to a liquid hydrogen booster pump, comprising a pump cylinder assembly, the pump cylinder assembly comprising a cylinder body and a pump cavity arranged in the cylinder body, an inner wall of the pump cavity is provided with a reinforcing part, the reinforcing part is arranged along the circumference of the pump cavity, and is used for improving the strength of the inner wall of the pump cavity; when the length of the pump cavity of the liquid hydrogen booster pump is relatively long, the cylinder body of the liquid hydrogen pump is not easy to be deformed under the pressure of the liquid hydrogen in the pump cavity, and is relatively safe.

Description

Technical Field

[0001] This disclosure relates to the field of liquid hydrogen transport equipment technology, and more specifically, to a liquid hydrogen booster pump. Background Technology

[0002] Piston pumps can be used as liquid hydrogen pumps for the delivery, filling, and transfer of liquid hydrogen. A liquid hydrogen pump includes a cylinder, a pump chamber within the cylinder, and a piston movably disposed within the pump chamber. The reciprocating motion of the piston changes the working volume within the pump chamber to complete the suction and discharge of liquid. To achieve a larger flow rate, the length of the pump chamber is often extended. However, with an extended pump chamber, the cylinder is prone to deformation under the pressure of the liquid hydrogen within the pump chamber, and may even burst, posing a significant safety hazard. Summary of the Invention

[0003] The purpose of this disclosure is to provide a liquid hydrogen booster pump that enhances the strength of the pump chamber wall by installing reinforcing components on the cylinder body, making the cylinder body less prone to deformation and thus safer.

[0004] To achieve the above objectives, this disclosure provides a liquid hydrogen booster pump, comprising: A pump cylinder assembly includes a cylinder body and a pump chamber disposed within the cylinder body. A reinforcing member is provided on the inner wall of the pump chamber, and the reinforcing member extends circumferentially along the pump chamber.

[0005] Optionally, the reinforcement is located in the middle of the pump cavity in the extending direction of the pump cavity.

[0006] Optionally, the reinforcement is constructed as a reinforcement ring, the outer wall of which is fitted to the inner wall of the pump cavity.

[0007] Optionally, the reinforcing member is integrally formed with the cylinder body, and the thickness of the reinforcing member is 0.1 to 0.5 times the thickness of the sidewall of the pump cavity.

[0008] Optionally, the pump cylinder assembly further includes a first piston and a second piston movably disposed in the pump chamber and respectively located on both sides of the reinforcing ring in the extending direction of the pump chamber. The first piston and the second piston are movably and sealingly connected to the inner wall of the pump chamber to divide the pump chamber into an upper chamber, a middle chamber and a lower chamber. The cylinder body is provided with a first inlet and a first outlet communicating with the upper chamber, and a second inlet and a second outlet communicating with the lower chamber.

[0009] Optionally, the first inlet is provided with a first check valve to allow liquid hydrogen to flow into the upper cavity, and the first outlet is provided with a second check valve to allow liquid hydrogen to flow out of the upper cavity; and / or The second inlet is provided with a third check valve for allowing liquid hydrogen to flow into the lower chamber, and the second outlet is provided with a fourth check valve for allowing liquid hydrogen to flow out of the lower chamber.

[0010] Optionally, the cylinder block is provided with an exhaust port for communicating with the middle cavity, and the exhaust port is provided with an overflow valve.

[0011] Optionally, the reinforcing ring has a first channel, and the pump cylinder assembly further includes a connecting rod that is movably inserted through the first channel. The two ends of the connecting rod are respectively connected to the first piston and the second piston, and there is a gap between the outer wall of the connecting rod and the inner wall of the first channel.

[0012] Optionally, the liquid hydrogen booster pump further includes a drive assembly, which includes a drive member and a shaft support member connected to the cylinder body. The shaft support member is provided with a second channel. The drive member includes a drive rod, which is movably inserted through the second channel and connected to the first piston or the second piston, for driving the first piston and the second piston to move along the extension direction of the pump chamber.

[0013] Optionally, the drive rod is movably and sealingly connected to the inner wall of the second channel, the shaft support includes a support portion and a thermal insulation portion connected together, one end of the support portion away from the thermal insulation portion is connected to the cylinder body, the support portion and the cylinder body are inserted into the liquid hydrogen storage tank from the outlet of the liquid hydrogen storage tank, and the thermal insulation portion is located outside the liquid hydrogen storage tank for cooling the outlet of the liquid hydrogen storage tank; The thermal insulation section has a liquid nitrogen interlayer.

[0014] With the above technical solution, a reinforcing member is provided on the inner wall of the pump chamber. The reinforcing member extends along the circumference of the pump chamber and can be used to enhance the strength of the inner wall of the pump chamber. When the length of the pump chamber of the liquid hydrogen booster pump is long, the cylinder of the liquid hydrogen pump is not easy to deform under the pressure of liquid hydrogen in the pump chamber, which is relatively safe.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a cross-sectional structural schematic diagram of the liquid hydrogen booster pump provided in an exemplary embodiment of this disclosure; Figure 2 This is a cross-sectional structural schematic diagram of the pump cylinder assembly provided in an exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of the shaft support provided in an exemplary embodiment of this disclosure; Figure 4 This is a cross-sectional structural diagram of the liquid hydrogen booster pump provided in an exemplary embodiment of this disclosure, in its operating state.

[0017] Explanation of reference numerals in the attached figures 10-Pump cylinder assembly; 101-First check valve; 102-Second check valve; 103-Third check valve; 104-Fourth check valve; 105-Relief valve; 11-Cylinder body; 111-First inlet; 112-First outlet; 113-Second inlet; 114-Second outlet; 115-Exhaust port; 116-First connection; 12-Pump chamber; 121-Upper chamber; 122-Middle chamber; 123-Lower chamber; 13-The... 14-Reinforcing member; 140-Reinforcing ring; 15-Connecting rod; 16-Second piston; 17-Second sealing ring; 18-First sealing ring; 19-First channel; 20-Drive assembly; 21-Driver; 210-Hydraulic cylinder; 211-Drive rod; 22-Shaft support; 221-Thermal insulation part; 2211-Liquid nitrogen jacket; 222-Support part; 22a-Second channel; 22b-Connecting groove; 30-Liquid hydrogen storage tank. Detailed Implementation

[0018] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0019] In this disclosure, an X-direction is established for the liquid hydrogen booster pump, where X is the first direction, the direction pointed to by the X-direction arrow is the positive direction of the first direction, and the opposite direction is the negative direction of the first direction. Unless otherwise stated, directional terms such as "inner" and "outer" refer to the inner and outer contours relative to the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not have sequential or importance implications. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element.

[0020] This disclosure provides a liquid hydrogen booster pump, such as Figures 1 to 4 As shown, the liquid hydrogen booster pump includes a pump cylinder assembly 10, which includes a cylinder body 11 and a pump chamber 12 disposed within the cylinder body 11. A reinforcing member 14 is provided on the inner wall of the pump chamber 12, extending circumferentially along the pump chamber 12 to improve the strength of the inner wall of the pump chamber 12. When the length of the pump chamber 12 of the liquid hydrogen booster pump is relatively long, the cylinder body 11 of the liquid hydrogen pump is not easily deformed under the pressure of liquid hydrogen in the pump chamber 12, which is relatively safe.

[0021] In the above embodiments, the reinforcing member 14 can be constructed arbitrarily according to actual needs. For example, the reinforcing member 14 can be constructed as a reinforcing ring 140, with the outer wall of the reinforcing ring 140 fitting against the inner wall of the pump cavity 12. This can improve the strength of the inner wall of the pump cavity 12 while saving the space occupied by the reinforcing ring 140 in the pump cavity 12.

[0022] In some possible implementations, the reinforcement 14 may also be configured as a reinforcement disc, the outer wall of which is attached to the inner wall of the pump chamber 12 and connected to the inner wall of the pump chamber 12, so as to improve the strength of the inner wall of the pump chamber 12 and make the cylinder 11 of the liquid hydrogen pump less prone to deformation.

[0023] In practical applications of liquid hydrogen booster pumps, it has been found that the weakest point of the inner wall of the pump chamber 12 is usually located in the middle of the pump chamber 12 in the extension direction. Therefore, the reinforcing member 14 can be provided in the middle of the extension direction of the pump chamber 12 to improve the strength of the inner wall in the middle of the pump chamber 12.

[0024] In some embodiments, the reinforcing member 14 is integrally formed with the cylinder body 11, which can ensure the connection strength between the reinforcing member 14 and the cylinder body 11. The thickness of the reinforcing member 14 is 0.1 to 0.5 times the thickness of the sidewall of the pump chamber 12, which can ensure the strength of the cylinder body 11 while the overall weight of the liquid hydrogen booster pump is not increased much.

[0025] In some specific embodiments, the width of the constraint reinforcing ring 140 can be 5cm-20cm, preferably 10cm, and the thickness of the constraint reinforcing ring 140 is 0.1 to 0.5 times the thickness of the sidewall of the pump cavity 12, preferably 0.2 times. A chamfer can be provided between the angle between the reinforcing ring 140 and the inner wall of the pump cavity 12 to avoid stress concentration.

[0026] In some implementations, such as Figure 1 , Figure 2 as well as Figure 4 As shown, the pump cylinder assembly 10 also includes a first piston 13 and a second piston 16 movably disposed in the pump chamber 12 and respectively located on both sides of the reinforcing ring 140 in the extending direction of the pump chamber 12. The first piston 13 and the second piston 16 are movably and sealingly connected to the inner wall of the pump chamber 12 to divide the pump chamber 12 into an upper chamber 121, a middle chamber 122 and a lower chamber 123. The cylinder body 11 is provided with a first liquid inlet 111 and a first liquid outlet 112 communicating with the upper chamber 121. The cylinder body 11 is provided with a second liquid inlet 113 and a second liquid outlet 114 communicating with the lower chamber 123.

[0027] In the above embodiments, both the upper chamber 121 and the lower chamber 123 are working chambers of the liquid hydrogen booster pump. When the second piston 16 moves in the pump chamber 12 along the extending direction of the pump chamber 12, causing the volume of the upper chamber 121 to expand, liquid hydrogen can enter the upper chamber 121 through the first inlet 111. When the second piston 16 moves in the pump chamber 12 along the extending direction of the pump chamber 12, causing the volume of the upper chamber 121 to shrink, the liquid hydrogen in the upper chamber 121 can be discharged through the first outlet 112. When the first piston 13 moves in the pump chamber 12 along the extending direction of the pump chamber 12, causing the volume of the lower chamber 123 to expand, liquid hydrogen enters the lower chamber 123 through the first inlet 111. When the first piston 13 moves in the pump chamber 12 along the extending direction of the pump chamber 12, causing the volume of the lower chamber 123 to shrink, the liquid hydrogen in the lower chamber 123 can be discharged through the second outlet 114.

[0028] In some embodiments, the first inlet 111 is provided with a first check valve 101 for allowing liquid hydrogen to flow into the upper chamber 121, and the first outlet 112 is provided with a second check valve 102 for allowing liquid hydrogen to flow out of the upper chamber 121. The second inlet 113 is provided with a third check valve 103 for allowing liquid hydrogen to flow into the lower chamber 123, and the second outlet 114 is provided with a fourth check valve 104 for allowing liquid hydrogen to flow out of the lower chamber 123.

[0029] With the above configuration, when the volume of the upper cavity 121 expands, liquid hydrogen enters the upper cavity 121 through the first inlet 111. When the volume of the upper cavity 121 decreases, liquid hydrogen flows out of the upper cavity 121 through the first outlet 112. When the volume of the lower cavity 123 expands, liquid hydrogen enters the lower cavity 123 through the second inlet 113. When the volume of the lower cavity 123 decreases, the liquid hydrogen in the lower cavity 123 flows out of the lower cavity 123 through the second outlet 114.

[0030] In some embodiments, as mentioned above, the pump chamber 12 of the liquid hydrogen booster pump also has a middle chamber 122. During the initial operation of the liquid hydrogen booster pump, a small amount of liquid hydrogen in the upper chamber 121 enters the middle chamber 122 through the space between the second piston 16 and the inner wall of the pump chamber 12. A small amount of liquid hydrogen in the lower chamber 123 enters the middle chamber 122 through the space between the first piston 13 and the inner wall of the pump chamber 12. During the movement of the first piston 13, heat is generated by friction between it and the inner wall of the pump chamber 12. During the movement of the second piston 16, heat is generated by friction between it and the inner wall of the pump chamber 12. The liquid hydrogen in the middle chamber 122 vaporizes after absorbing the heat generated by the friction between the first piston 13 and the second piston 16, thereby increasing the pressure in the middle chamber 122. When the gas pressure in the middle chamber 122 acts on the first piston 13 and the second piston 16, an air seal can be formed on the first piston 13 and the second piston 16, which can reduce the sealing pressure on the first piston 13 and the second piston 16.

[0031] In the above embodiment, the first piston 13 can be movably and sealingly connected to the inner wall of the pump chamber 12 by means of the first sealing ring 18 sleeved on the first piston 13, and the second piston 16 can be movably sealed to the inner wall of the pump chamber 12 by means of the second sealing ring 17 sleeved on the hot piston. Through the gas seal formed in the above-mentioned middle cavity 122, the sealing pressure of the first piston 13 and the second piston 16 can be reduced, thereby appropriately reducing the number of the first sealing ring 18 sleeved on the first piston 13 and the second sealing ring 17 sleeved on the second piston 16.

[0032] It should be noted that the intermediate cavity 122 between the first piston 13 and the second piston 16 does not require liquid suction or discharge. Therefore, the pressure in the intermediate cavity 122 is relatively lower than that in the upper cavity 121 and the lower cavity 123, which can protect the weak points in the pump cavity 12. In other words, in order to prevent deformation of the weak points in the pump cavity 12, on the one hand, a reinforcing ring 140 is set at the weak point of the pump cavity 12 of the liquid hydrogen pump to increase the strength of the inner wall of the pump cavity 12. On the other hand, by setting the first piston 13 and the second piston 16, the weak point of the inner wall of the pump cavity 12 corresponds to the intermediate cavity 122, reducing the pressure on the weak point of the pump cavity 12, and further protecting the weak point of the inner wall of the pump cavity 12.

[0033] In some embodiments, the cylinder 11 is provided with an exhaust port 115 for communicating with the intermediate cavity 122. An overflow valve 105 is provided on the exhaust port 115, which can open when the air pressure in the intermediate cavity 122 reaches a preset value, so as to discharge at least part of the gas in the intermediate cavity 122 and prevent the pressure in the intermediate cavity 122 from being too high.

[0034] In some embodiments, the reinforcing ring 140 has a first channel 19, and the pump cylinder assembly 10 further includes a connecting rod 15, which is movably disposed through the first channel 19. The two ends of the connecting rod 15 are respectively connected to the first piston 13 and the second piston 16, and there is a gap between the outer wall of the connecting rod 15 and the inner wall of the first channel 19.

[0035] In the above embodiment, the connecting rod 15 ensures that the first piston 13 and the second piston 16 do not move relative to each other, thus maintaining the volume of the middle cavity 122. Furthermore, it allows the first piston 13 and the second piston 16 to move synchronously, meaning they can move synchronously in the same direction within the pump cavity 12. Figure 1 , Figure 2 as well as Figure 4As shown, the pump chamber 12 extends along a first direction. When the first piston 13 and the second piston 16 move synchronously in the pump chamber 12 in the positive direction of the first direction, the volume of the upper chamber 121 decreases and the volume of the lower chamber 123 increases, so that the liquid hydrogen in the upper chamber 121 is discharged through the first outlet 112, and the upper chamber 121 completes the liquid discharge action; at the same time, the liquid hydrogen enters the lower chamber 123 through the second inlet 113, and the lower chamber 123 completes the liquid suction action. When the first piston 13 and the second piston 16 move synchronously in the negative direction of the first direction in the pump chamber 12, the volume of the upper chamber 121 increases and the volume of the lower chamber 123 decreases, so that the liquid hydrogen enters the upper chamber 121 through the first inlet 111, and the upper chamber 121 completes the liquid suction action; at the same time, the liquid hydrogen in the lower chamber 123 is discharged through the second outlet 114, and the lower chamber 123 completes the liquid discharge action. The first piston 13 and the second piston 16 reciprocate in the pump chamber 12 so that the upper chamber 121 and the lower chamber 123 alternately draw in and discharge liquid, thereby improving the working efficiency of the liquid hydrogen booster pump.

[0036] It should be understood that the first piston 13 and the second piston 16 are simultaneously located in the pump chamber 12 and move synchronously, which reduces the stroke of the first piston 13 and the second piston 16 relative to a single piston, thereby reducing wear on the first piston 13 and the second piston 16 and improving the service life of the pistons.

[0037] In some specific embodiments, the thickness of the first piston 13 can be 0.2 to 0.3 times the extension length of the pump chamber 12, preferably 0.15 times, and 3 to 5 first sealing rings 18 are provided on the piston; the thickness of the second piston 16 can be 0.2 to 0.3 times the extension length of the pump chamber 12, preferably 0.15 times, and 3 to 5 sealing rings are provided on the second piston 16. The flexibility design value of the connecting rod 15 between the first piston 13 and the second piston 16 should be greater than 60, and the maximum diameter of the connecting rod 15 is the inner diameter of the constraint ring minus 0.5 mm, so that there is a gap between the connecting rod 15 and the inner wall of the reinforcing ring 140, thereby allowing the vaporized hydrogen in the middle cavity 122 to act on the first piston 13 and the second piston 16 simultaneously.

[0038] Furthermore, in some specific embodiments, the thickness of the inner wall of the pump chamber 12 can be 105 mm, the width of the reinforcing ring 140 is 10 cm, the thickness of the reinforcing ring 140 is 0.2 times the thickness of the pump chamber 12, i.e., 11 cm, the length of the pump chamber 12 is 800 mm, the effective operating length (excluding the reinforcing ring 140 and the dead zone) is 600 mm, the thickness of the first piston 13 is 0.15 times the length of the pump chamber 12, i.e., 90 mm, the thickness of the second piston 16 is 0.15 times the length of the pump chamber 12, i.e., 90 mm, and the diameter of the connecting rod 15 is 80 mm.

[0039] In some embodiments, the liquid hydrogen booster pump further includes a drive assembly 20, which includes a drive member 21 and a shaft support member 22 connected to the cylinder body 11. The shaft support member 22 has a second channel 22a. The drive member 21 includes a drive rod 211, which is movably inserted through the second channel 22a and can be connected to a first piston 13 or a second piston 16 to drive the first piston 13 and the second piston 16 to move along the extension direction of the pump chamber 12. That is, under the drive of the drive assembly 20, the first piston 13 and the second piston 16 can move synchronously in the pump chamber 12 in the forward or reverse direction of a first direction.

[0040] In the above embodiment, the shaft support 22 can support the movement of the drive rod 211, and the second channel 22a on the shaft support 22 can guide the drive rod 211 and limit the drive rod 211 in its radial direction, so that the drive rod 211 can smoothly drive the first piston 13 and the second piston 16 to move in the pump chamber 12. It can also make the center of the first piston 13 and the second piston 16 coincide with the central axis of the pump chamber 12, so that the first piston 13 and the second piston 16 can run along the central axis, avoiding uneven wear of the first piston 13 and the second piston 16.

[0041] In some specific embodiments, the drive element 21 can be configured in any suitable form according to actual needs. For example, the drive element 21 can be constructed as a hydraulic cylinder 210 or an electric cylinder, such as... Figure 1 , Figure 2 as well as Figure 4 As shown, when the drive element 21 is configured as a hydraulic cylinder 210, the drive rod 211 is configured as the piston rod of the hydraulic cylinder 210. The piston rod of the hydraulic cylinder 210 can be connected to the second piston 16 to drive the movement of the second piston 16 and the first piston 13 in the pump chamber 12.

[0042] In some embodiments, the drive rod 211 is movably and sealingly connected to the inner wall of the second channel 22a. Specifically, a sealing ring can be provided in the second channel 22a. The sealing ring is fixedly connected to the inner wall of the second channel 22a and is movably sleeved on the drive rod 211 to form a movable seal between the sealing ring and the drive rod 211. The seal between the drive rod 211 and the second channel 22a can prevent liquid hydrogen in the pump chamber 12 of the cylinder 11 from flowing out of the pump chamber 12 with the drive rod 211, thus avoiding leakage of liquid hydrogen in the pump chamber 12.

[0043] Furthermore, the shaft support 22 includes a support portion 222 and a thermal insulation portion 221 connected together. The end of the support portion 222 away from the thermal insulation portion 221 is connected to the cylinder body 11. The support portion 222 and the cylinder body 11 can be connected in any suitable manner. For example, a connecting groove 22b can be provided on the support portion 222, and a connecting portion can be provided on the cylinder body 11. An internal thread can be provided in the connecting groove 22b, and an external thread corresponding to the connecting groove 22b can be provided on the connecting portion. The cylinder body 11 and the support portion 222 are connected through the threaded connection between the connecting portion and the connecting groove 22b.

[0044] It should be noted that the connection between the support 222 and the cylinder 11 needs to be sealed. For example, a sealing ring can be provided at the connection between the cylinder 11 and the support 222 to prevent liquid hydrogen in the pump chamber 12 of the cylinder 11 from leaking out through the connection between the support 222 and the cylinder 11.

[0045] In some implementations, such as Figure 4 As shown, when the liquid hydrogen in the liquid hydrogen storage tank 30 is transferred by the liquid hydrogen booster pump, the support part 222 and the cylinder 11 of the liquid hydrogen booster pump are inserted into the liquid hydrogen storage tank 30 through the outlet of the liquid hydrogen storage tank 30. The thermal insulation part 221 is located outside the liquid hydrogen storage tank 30 and is used to cool the outlet of the liquid hydrogen storage tank 30 to prevent heat from the environment from entering the liquid hydrogen storage tank 30 through the outlet. The thermal insulation part 221 has a liquid nitrogen jacket 2211. In addition, it should be understood that the thermal insulation part 221 can also prevent heat from entering the pump chamber 12 of the cylinder 11 through the second channel 22a, which will not be described in detail here.

[0046] This disclosure exemplarily describes the operation of the liquid hydrogen booster pump. The first outlet 112 and the second outlet 114 on the cylinder 11 are connected to the subsequent system via pipelines. Then, the cylinder 11 and the support 222 of the liquid hydrogen booster pump are inserted into the liquid hydrogen storage tank 30 through the outlet. The thermal insulation part 221 is located outside the liquid hydrogen storage tank 30 and is sealed to the outlet of the liquid hydrogen storage tank 30. The drive member 21, configured as a hydraulic cylinder 210, is activated. The drive rod 211, configured as the piston rod of the hydraulic cylinder 210, extends and retracts. When the drive rod 211 extends, it drives the first piston 13 and the second piston 16 to move away from the shaft support 22. The volume of the upper chamber 121 expands, and the volume of the lower chamber 123 is compressed. The liquid hydrogen in the liquid hydrogen storage tank 30... Liquid hydrogen enters the upper chamber 121 through the first inlet 111, and liquid hydrogen in the lower chamber 123 is discharged to the subsequent system through the second outlet 114. When the drive rod 211 retracts, it drives the first piston 13 and the second piston 16 to move toward the shaft support 22. The volume of the upper chamber 121 is compressed, and the volume of the lower chamber 123 is expanded. Liquid hydrogen in the upper chamber 121 is discharged through the first outlet 112, and liquid hydrogen in the liquid hydrogen storage tank 30 enters the lower chamber 123 through the second inlet 113. The drive rod 211 moves back and forth, and the upper chamber 121 and the lower chamber 123 alternately draw in and discharge liquid. When the piston frequency reaches 30 times / min, the liquid hydrogen delivery flow rate of the liquid hydrogen booster pump can reach 480 kg per hour, and the pressure in the pump chamber 12 of the liquid hydrogen booster pump can reach a liquid hydrogen boosting pressure of 90 MPa.

[0047] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0049] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A liquid hydrogen booster pump, characterized in that, include: A pump cylinder assembly includes a cylinder body and a pump chamber disposed within the cylinder body. A reinforcing member is provided on the inner wall of the pump chamber, and the reinforcing member extends circumferentially along the pump chamber.

2. The liquid hydrogen booster pump according to claim 1, characterized in that, The reinforcing member is located in the middle of the pump cavity in the extending direction of the pump cavity.

3. The liquid hydrogen booster pump according to claim 1 or 2, characterized in that, The reinforcing member is constructed as a reinforcing ring, and the outer wall of the reinforcing ring is attached to the inner wall of the pump cavity.

4. The liquid hydrogen booster pump according to claim 1, characterized in that, The reinforcing member is integrally formed with the cylinder body, and the thickness of the reinforcing member is 0.1 to 0.5 times the thickness of the side wall of the pump cavity.

5. The liquid hydrogen booster pump according to claim 3, characterized in that, The pump cylinder assembly further includes a first piston and a second piston movably disposed in the pump chamber and respectively located on both sides of the reinforcing ring in the extending direction of the pump chamber. The first piston and the second piston are movably and sealingly connected to the inner wall of the pump chamber to divide the pump chamber into an upper chamber, a middle chamber and a lower chamber. The cylinder body is provided with a first inlet and a first outlet communicating with the upper chamber, and a second inlet and a second outlet communicating with the lower chamber.

6. The liquid hydrogen booster pump according to claim 5, characterized in that, The first inlet is provided with a first check valve for allowing liquid hydrogen to flow into the upper chamber, and the first outlet is provided with a second check valve for allowing liquid hydrogen to flow out of the upper chamber; and / or The second inlet is provided with a third check valve for allowing liquid hydrogen to flow into the lower chamber, and the second outlet is provided with a fourth check valve for allowing liquid hydrogen to flow out of the lower chamber.

7. The liquid hydrogen booster pump according to claim 5, characterized in that, The cylinder body is provided with an exhaust port for connecting the middle cavity, and an overflow valve is provided on the exhaust port.

8. The liquid hydrogen booster pump according to claim 5, characterized in that, The reinforcing ring has a first channel, and the pump cylinder assembly further includes a connecting rod that is movably inserted through the first channel. The two ends of the connecting rod are respectively connected to the first piston and the second piston, and there is a gap between the outer wall of the connecting rod and the inner wall of the first channel.

9. The liquid hydrogen booster pump according to claim 8, characterized in that, The liquid hydrogen booster pump further includes a drive assembly, which includes a drive component and a shaft support component connected to the cylinder body. The shaft support component is provided with a second channel. The drive component includes a drive rod, which is movably inserted through the second channel and connected to the first piston or the second piston, for driving the first piston and the second piston to move along the extension direction of the pump chamber.

10. The liquid hydrogen booster pump according to claim 9, characterized in that, The drive rod is movably and sealingly connected to the inner wall of the second channel. The shaft support includes a support part and a thermal insulation part connected together. One end of the support part away from the thermal insulation part is connected to the cylinder body. The support part and the cylinder body are inserted into the liquid hydrogen storage tank from the outlet of the liquid hydrogen storage tank. The thermal insulation part is located outside the liquid hydrogen storage tank and is used to cool the outlet of the liquid hydrogen storage tank. The thermal insulation section has a liquid nitrogen interlayer.

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