Cryogenic storage vessel having liquid hydrogen fuel supply pump

Abstract

The present invention relates to a cryogenic storage vessel having a liquid hydrogen fuel supply pump in order to stably pressurize and supply liquid hydrogen fuel stored in a liquid state at a cryogenic temperature and, more specifically, to a cryogenic storage vessel having a liquid hydrogen fuel supply pump, wherein the cryogenic storage vessel is for reducing the heat load of cryogenic liquid hydrogen and thereby minimizing the vaporization amount thereof.

Description

cryogenic storage container equipped with a liquid hydrogen fuel supply pump

[0001] The present invention relates to a cryogenic storage container equipped with a liquid hydrogen fuel supply pump for stably pumping liquid hydrogen fuel stored in a liquid state at cryogenic temperatures, and more specifically, to a cryogenic storage container equipped with a liquid hydrogen fuel supply pump for reducing the thermal load of cryogenic liquid hydrogen and minimizing the amount of vaporization.

[0002] Today, hydrogen fuel cells generate power using the electrochemical reaction between hydrogen and oxygen, and because the only byproduct is water, they are gaining attention as an eco-friendly energy source with high energy efficiency compared to conventional internal combustion engines.

[0003] Particularly in the automotive industry, as hydrogen fuel cell vehicles—which operate by driving motors using electricity generated by reacting hydrogen with oxygen from the air instead of gasoline internal combustion engines—are garnering attention as next-generation eco-friendly vehicles due to increasingly stringent emission regulations, active research is being conducted by various automakers.

[0004] Various modes of transportation that use hydrogen as fuel and oxygen as an oxidizer, including hydrogen fuel cell vehicles, drones, and micro-mobility, utilize a fuel cell stack as a power source. This stack generates electrical energy by electrochemically reacting gaseous or liquid hydrogen fuel supplied from a hydrogen tank with oxygen in the air. Consequently, they do not emit pollutants such as exhaust gases, thus causing no environmental pollution. Furthermore, due to their superior energy efficiency compared to other fuels, they can travel long distances with less fuel.

[0005] As hydrogen fuel cell technology advances, the automotive industry is currently making efforts to apply hydrogen fuel storage and supply systems to large trucks with high greenhouse gas emissions. Additionally, liquefied hydrogen-based fuel storage and supply systems are emerging as a strategically important core technology capable of overcoming the limitations of electric vehicles and increasing the efficiency of long-distance eco-friendly transportation.

[0006] Meanwhile, liquid hydrogen, which is produced by lowering the temperature of gaseous hydrogen to minus 253 degrees to create a cryogenic liquid state, is considered an essential item for the hydrogen economy because it is advantageous in terms of transportation efficiency and storage density (capacity) compared to gaseous hydrogen, such as being able to maintain safety even when the pressure of the storage container is significantly lower than that of vaporized hydrogen.

[0007] In order to transport cryogenic liquid hydrogen stored in such a storage container to a supply target such as a fuel cell, a means is required to raise the pressure of the cryogenic liquid hydrogen stored in the tank to the fuel cell inlet pressure condition due to the pressure difference between the pressure inside the storage container and the fuel cell inlet.

[0008] In other words, since the inside of the cryogenic liquid hydrogen storage container maintains a pressure of about 5 to 6 bar and the inlet side of the fuel cell maintains a pressure of about 15 to 16 bar, in order to use liquid hydrogen as fuel for the fuel cell, a booster pump must be installed in the middle of the liquid hydrogen flow to increase the supply pressure to about 15 to 16 bar and supply it to the fuel cell through the fuel supply line (discharge line) and via the vaporizer.

[0009] In addition, for smooth pumping, a pressure greater than the saturated vapor pressure of cryogenic liquid hydrogen must be maintained at the suction end of the pump. However, if a pressure greater than the saturated vapor pressure of cryogenic liquid hydrogen is not maintained, the suction head (NPSH) is not secured, and vaporized gas may flow in, causing the pump to idle due to cavitation.

[0010] However, conventional pumps for transporting cryogenic liquid hydrogen consist of a motor installed outside the tank where the cryogenic liquid hydrogen is stored and operating at room temperature, and a pump component operating inside the tank by the rotational force of the motor. Consequently, external heat, such as thermal energy generated by the motor, is forcibly transferred to the cryogenic liquid hydrogen inside the tank through the motor's drive shaft and the pump component, thereby applying a thermal load and causing an increase in the amount of cryogenic liquid hydrogen vaporizing into a gaseous state.

[0011] In other words, due to the nature of liquid hydrogen being stored in tank-type storage containers at cryogenic temperatures, there is a problem in that the generation of Boil-Off Gas (BOG) occurs when heat is transferred from an external heat source via conduction, convection, or radiation, causing the liquid hydrogen to vaporize into a gaseous state within the storage container and resulting in a loss of the cryogenic liquid hydrogen.

[0012] Meanwhile, conventional permanent magnets have the characteristic of generating and maintaining a stable magnetic field without receiving electrical energy from an external source, and preserving a strong magnetized state for a long time.

[0013] These permanent magnets are divided into North and South poles and continuously emit magnetic field lines outward; like poles repel each other, while opposite poles attract each other. Therefore, repulsive and attractive forces are constantly generated between magnets.

[0014] It is stated that the background technology or prior art described herein refers to information possessed by the inventor or acquired during the process of deriving and completing the present invention, and is specified merely to aid in understanding the technical significance of the present invention and to be useful for prior art search and examination, and does not mean technology that was generally known and widely used in the technical field to which the invention belongs prior to the filing of the present invention.

[0015] Accordingly, the inventors of the present invention, while comprehensively considering the aforementioned matters and with the idea of ​​resolving the technical limitations and problems of existing cryogenic liquid hydrogen storage containers, have devised the present invention as a result of tireless research aimed at developing a cryogenic storage container equipped with a liquid hydrogen fuel supply pump of a new structure capable of reducing external heat penetration to suppress temperature and pressure rise, and minimizing the generation and loss rate of evaporated gas due to the vaporization of liquid hydrogen.

[0016] Therefore, the technical problem and objective of the present invention is to provide a cryogenic storage container equipped with a liquid hydrogen fuel supply pump capable of reducing heat loss of cryogenic liquid hydrogen.

[0017] The technical problems and objectives that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems and objectives will be clearly understood by those skilled in the art from the description below.

[0018] Specific means according to an aspect of the present invention for effectively achieving a specific technical purpose while embodying a new concept for solving the technical problem of the present invention as described above include: a liquid hydrogen tank having a vacuum insulation layer formed between an inner tank and an outer tank, and an insertion space formed on one surface that is narrow and deep inwardly; a drive motor installed on the outside of the liquid hydrogen tank and generating rotational force when power is supplied; a driving body located within the insertion space while attached to the end of the drive shaft of the drive motor and rotated around the drive shaft by the drive motor, wherein a plurality of permanent magnets are arranged at equal angular intervals with alternating polarities around the drive shaft of the drive motor; a pump installed to be submerged in the liquid hydrogen (LH2; Liquefied hydrogen) inside the liquid hydrogen tank, sucking in the liquid hydrogen inside the liquid hydrogen tank and sending it to the outside of the liquid hydrogen tank through a discharge pipe; and a device attached to the rotation shaft of the pump member and around the end portion of the insertion space inside the liquid hydrogen tank A cryogenic storage container equipped with a liquid hydrogen fuel supply pump is provided, characterized by employing a driven member that operates the pump member by rotating together with the magnetic force of the prime mover, wherein a plurality of permanent magnets are arranged at equal angular intervals with different polarities to correspond to the permanent magnets of the prime mover on all four sides centered on the drive shaft of the drive motor.

[0019] Thus, the present invention can reduce heat leakage of cryogenic liquid hydrogen in a liquid hydrogen tank to suppress the rise in temperature and pressure, and minimize the generation and loss rate of evaporated gas due to the vaporization of liquid hydrogen.

[0020] In addition, in a preferred embodiment of the present invention, the insertion space is formed as a vertically elongated cylinder with a closed bottom, and a vacuum insulation layer is formed between the inner and outer tanks, thereby preventing heat generated from the drive motor and external heat from intruding into the liquid hydrogen tank by conduction through the drive shaft and the drive body of the drive motor.

[0021] In addition, a preferred aspect of the present invention can stably install and support the pump so that it is submerged in the liquid hydrogen within the liquid hydrogen tank by mounting a bracket around the end portion of the insertion space within the liquid hydrogen tank and mounting the pump on the bracket.

[0022] In addition, as a preferred aspect of the present invention, the pump may be applied by adopting a structure in which liquid hydrogen within the liquid hydrogen tank is drawn in through the suction pipe by the centrifugal force generated when the pump member rotates within the casing and is pumped out of the liquid hydrogen tank through the discharge pipe, and the driven member is attached to the rotation axis of the pump member and positioned around the end portion of the insertion space within the liquid hydrogen tank, and rotates the pump member by rotating together with the magnetic force of the prime mover.

[0023] In addition, in a preferred aspect of the present invention, the pump comprises a cylinder having a suction port formed on one side for sucking in liquid hydrogen from the liquid hydrogen tank and a discharge port formed on the other side (opposite side) for discharging liquid hydrogen, the discharge port and the discharge pipe connected thereto; a suction valve installed in the suction port for opening and closing the flow of liquid hydrogen; a discharge valve installed in the discharge port for opening and closing the flow of liquid hydrogen; a piston that pressurizes and moves liquid hydrogen while reciprocating within the cylinder; a crank arm that rotates while fixed to the central axis of the driven body; and a connecting rod whose front end is connected to the piston by a pin joint and whose rear end is connected to the crank arm by a pin joint, thereby converting the rotational motion of the crank arm into the linear reciprocating motion of the piston. Thus, the piston can reciprocate within the cylinder in conjunction with the rotation of the driven body, suck in liquid hydrogen from the liquid hydrogen tank, pressurize it, and send it to the discharge pipe.

[0024] According to an embodiment that implements the technical concept on which a unique solution means is based to solve the technical problem of the present invention, the magnetic poles generated between the permanent magnets of the prime mover and the driven member cause the properties of repulsion or attraction to act upon each other, so that the driven member can rotate simultaneously without direct contact with the prime mover and rotate a pump member submerged in liquid hydrogen within a liquid hydrogen tank.

[0025] In addition, the drive shaft and prime mover of the drive motor are located within the insertion space of the liquid hydrogen tank, which has a vacuum insulation layer between the inner and outer tanks, and the driven member is located on the outer perimeter of the insertion space within the liquid hydrogen tank and rotates simultaneously by the drive motor. Therefore, it is possible to prevent heat generated by the drive motor or external heat from penetrating into the liquid hydrogen tank by conduction through the drive shaft and prime mover of the drive motor and being directly transferred by conduction.

[0026] Therefore, heat loss of cryogenic liquid hydrogen stored in a liquid hydrogen tank can be reduced to suppress the rise in temperature and pressure, and the generation and loss rate of evaporated gas due to the vaporization of liquid hydrogen can be minimized.

[0027] Furthermore, since the drive motor is installed outside the liquid hydrogen tank and its drive shaft and prime mover do not come into contact with the cryogenic liquid hydrogen, it is possible to prevent the drive motor from failing due to cooling caused by the coldness of the cryogenic liquid hydrogen.

[0028] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0029] FIG. 1 is a cross-sectional view schematically showing the configuration of a cryogenic storage container equipped with a liquid hydrogen fuel supply pump according to an embodiment of the present invention.

[0030] Figure 2 is an enlarged cross-sectional view schematically showing the cross-section from line A to A' of Figure 1.

[0031] FIG. 3 is a cross-sectional view schematically showing the configuration of a cryogenic storage container equipped with a liquid hydrogen fuel supply pump according to another embodiment of the present invention.

[0032] Hereinafter, embodiments according to the present invention will be described in more detail with reference to the attached drawings.

[0033] Prior to this, it is specified that the terms described below are defined in consideration of their functions in the present invention, and should be interpreted in accordance with the concept consistent with the technical spirit of the present invention and the meaning commonly accepted or recognized in the relevant technical field.

[0034] In addition, if it is determined that a detailed description of known functions or configurations related to the present invention could obscure the essence of the present invention, such detailed description is omitted.

[0035] It is stated that the attached drawings may be partially exaggerated or simplified for the purpose of explaining the configuration, operation, and operating principles of the technology, as well as for ease of understanding and clarity of the technology, and that each component in the drawings does not exactly correspond to the actual size and shape.

[0036] In addition, the term "and / or" in this specification means a combination of multiple related described items or includes any of the multiple related described items, and when a part is said to include a certain component, it means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0037] In other words, terms such as "comprising" and "having" as set forth in this specification mean that there is a feature, number, step, process, operation, component, part, or combination thereof, and should be understood as not excluding the existence or addition of one or more other features, numbers, steps, processes, operations, components, parts, or combinations thereof.

[0038] Furthermore, terms such as top, bottom, upper surface, lower surface, or upper, lower, upper side, lower side, front / rear, left / right, etc. used in the present invention are used for convenience to distinguish relative positions or explain directions of movement for each component. For example, the upper part of a drawing may be named or referred to as the upper part and the lower part as the lower part, and the length direction may be named or referred to as the front / rear direction and the width direction as the left / right direction.

[0039] In addition, terms such as "first," "second," etc. used in the present invention may be used to describe various components. That is, terms such as "first," "second," etc. may be used solely for the purpose of distinguishing one component from another.

[0040] [Best mode for carrying out the invention]

[0041] A cryogenic storage container equipped with a liquid hydrogen fuel supply pump according to an embodiment of the present invention comprises a liquid hydrogen tank (10), a driving motor (20), a prime mover (30), a pump (40), a driven member (50), and a bracket (60), as illustrated in FIGS. 1 and 2.

[0042] The liquid hydrogen tank (10) stores liquid hydrogen (LH2) in a cryogenic state supplied from the outside.

[0043] And the liquid hydrogen tank (10) is composed of a vacuum multilayer insulation system of a double metal container filled with a vacuum insulation layer (13) between the inner tank (11) and the outer tank (12) so as to provide insulation for the liquid hydrogen.

[0044] That is, the inner tank (11) is made of stainless steel such as SUS 316 or higher to store cryogenic liquid hydrogen (LH2), the outer tank (12) protects the inner tank (11), and MLI (Multi Layer Insulation) is installed between the inner tank (11) and the outer tank (12) to maintain an ultra-vacuum, so that the cryogenic liquid hydrogen (LH2) can be safely stored.

[0045] In addition, an insertion space (14) in the form of a narrow and deep hole is formed on the upper surface of the liquid hydrogen tank (10).

[0046] That is, the insertion space (14) is formed as a vertically elongated cylinder with a closed bottom to prevent heat generated from the drive motor (20) and external heat from entering the liquid hydrogen tank (10) through the drive shaft (21) and the drive body (30) of the drive motor (20), and a vacuum insulation layer (13) is also formed between the inner tank (11) and the outer tank (12) constituting the insertion space (14).

[0047] Of course, inside the insertion space (14), a magnetic field shielding means to block influence from an external magnetic field, such as an inner material made of a material that is not affected by magnetism, may be installed so as not to interfere with the rotation of the driving body (30).

[0048] The drive motor (20) is installed on one side of the outside of the liquid hydrogen tank (10) to generate rotational force when power is supplied and transmit it to the driving body (30).

[0049] That is, the drive motor (20) receives power from an external power source and transmits a driving force to rotate the drive shaft (21) at a constant speed, and can rotate the drive shaft (21) temporarily or continuously according to a control signal from a control unit (not shown).

[0050] And it is preferable that the drive shaft (21) of the drive motor (20) be formed of a material that has excellent rigidity and is not affected by magnetism, such as aluminum or stainless steel.

[0051] Here, a unit bearing that supports the load acting on the drive shaft (21) of the drive motor (20) and minimizes friction due to contact to rotate the rotation shaft more smoothly and gently can be mounted on one side of the liquid hydrogen tank (10).

[0052] Meanwhile, the drive motor (20) can be a conventional electric motor that converts electrical energy into mechanical energy to obtain rotational power, is easy to start (drive) and operate by signal current, is easy to select a model suitable for the load, has low noise and vibration, and is free from exhaust pollution.

[0053] For example, a servo motor that rotates at a constant angle by converting the voltage input into a rotation angle according to the magnitude or signal of the applied voltage, or a stepping motor that controls speed and direction by rotating at a constant angle each time a pulse signal is given, may be employed, and in addition, a geared motor including a reduction gear that reduces the rotational speed of the motor to output the power required for driving may be employed.

[0054] In addition, a hydraulic motor may be employed to generate power by applying high pressure generated by a hydraulic pump driven by a motor or engine to the operating shaft, so that operation is reliable, automatic remote control is possible, and speed adjustment, stopping, and reversing can be easily performed.

[0055] Meanwhile, the control unit controls the power and rotation of the drive motor (20), and controls the starting power and continuous power supply to the drive motor (20) by turning on / off the electrical connection between the drive of the drive motor (20) and an external power source, and also controls the rotational speed of the driving body (30) by increasing or decreasing the voltage supplied to the drive motor (20) or changing the resistance value.

[0056] The driving body (30) is attached to the end of the driving shaft (21) of the driving motor (20) so as to rotate by the driving motor (20), and is positioned so as not to come into contact with the insertion space (14).

[0057] That is, the driving body (30) rotates in one direction by the driving energy or rotational force transmitted from the driving shaft (21) of the driving motor (20).

[0058] And the driving body (30) is provided in the shape of a cylinder in which a plurality of permanent magnets (31) are arranged at equal angular intervals with different polarities around the driving shaft (21) of the driving motor (20).

[0059] For example, the permanent magnet (51) is formed in the shape of a bar magnet bent into an arc, and when a plurality of them are arranged radially from the center of the driven body (50), they form a circular ring shape, and both ends have different polarities.

[0060] That is, the permanent magnet (31) is divided into an N pole and a S pole and continuously emits magnetic field lines outward, generating a repulsive force between like poles and an attractive force between opposite poles.

[0061] Through this, rotational interference that occurs at the moment when the permanent magnet (31) of the driving body (30) moves out of the magnetic force region of the permanent magnet (51) of the driven body (50) or at the moment when the permanent magnet (31) of the driving body (30) enters the magnetic force region of the permanent magnet (51) of the driven body (50) can be minimized through relative interaction.

[0062] Here, it is preferable to use a thorium-based Nd magnet as the permanent magnet (31), and a superconducting magnet made of a superconductor may also be used.

[0063] The pump (40) is installed to be submerged in the liquid hydrogen (LH2) inside the liquid hydrogen tank (10).

[0064] That is, the pump (40) sucks in liquid hydrogen (LH2) from the liquid hydrogen tank (10) through the suction pipe (43) by the centrifugal force generated when the pump member (42) rotates inside the casing (41) and pumps it out of the liquid hydrogen tank (10) through the discharge pipe (44).

[0065] Here, the casing (41) and the pump member (42) are preferably formed from a rigid material selected from a group consisting of stainless steel, which is not affected by magnetic force while maintaining durability and appropriate strength without thermal shrinkage under cryogenic temperature conditions; nickel-based alloys with heat resistance and corrosion resistance such as Hastelloy and Inconel; cobalt-based alloys with excellent wear resistance and penetration resistance such as Stellite; and mixtures thereof.

[0066] Meanwhile, the pump (40) may be a positive displacement rotary pump that operates while submerged in liquid hydrogen (LH2) and rotates the pump member (42) within the casing (41) to extrude liquid hydrogen (LH2) from the suction side to the discharge side.

[0067] The driven member (50) is attached to the rotation axis of the pump member (42) and is positioned so as not to come into contact with the end portion of the insertion space (14) inside the liquid hydrogen tank (10).

[0068] That is, the driven member (50) is positioned on the same central axis as the driving member (30) so as to rotate together by the magnetic force of the driving member (30) and rotate the pump member (42) of the pump (40).

[0069] And the driven body (50) is provided in a cylindrical shape in which a plurality of permanent magnets (51) are arranged at equal angular intervals with different polarities so as to correspond to the permanent magnets (31) of the driving body (30) around the driving shaft (21) of the driving motor (20).

[0070] For example, the permanent magnet (51) is formed in the shape of a bar magnet bent into an arc, and when a plurality of them are arranged radially from the center of the driven body (50), they form a circular ring shape, and both ends have different polarities.

[0071] That is, the permanent magnet (51) is divided into an N pole and a S pole and continuously emits magnetic field lines outward, generating a repulsive force between like poles and an attractive force between opposite poles.

[0072] Through this, rotational interference that occurs at the moment when the permanent magnet (31) of the driving body (30) moves out of the magnetic force region of the permanent magnet (51) of the driven body (50) or at the moment when the permanent magnet (31) of the driving body (30) enters the magnetic force region of the permanent magnet (51) of the driven body (50) can be minimized through relative interaction.

[0073] Here, it is preferable to use a thorium-based Nd magnet as the permanent magnet (51), and a superconducting magnet made of a superconductor may also be used.

[0074] Additionally, the permanent magnets (51) may be arranged to form multiple concentric circles from the center of the insertion space (14) and the drive shaft (21). This is to enable a stronger rotational force to be output from the permanent magnets (51).

[0075] In addition, the permanent magnet (51) is divided and arranged at intervals of 10, 15, or 20 degrees from the center of the insertion space (14) and the drive shaft (21), thereby minimizing the critical state in a certain section where the driving body (30) rotates, and accordingly, the rotation of the pump member (42) can be performed smoothly.

[0076] A bracket (60) is mounted around the end of an insertion space (14) inside a liquid hydrogen tank (10) to stably support the pump (40) and to be installed so as to be submerged in the liquid hydrogen (LH2) inside the liquid hydrogen tank (10).

[0077] Here, the bracket (60) may be made of a material such as glass fiber reinforced plastic (FRP) which has low thermal conductivity and excellent durability, impact resistance, and wear resistance, in order to firmly support the pump (40) so that it does not move within the liquid hydrogen tank (10).

[0078] [Operating Principle and Function]

[0079] The main operation, operating principle, and function of the cryogenic storage container equipped with a liquid hydrogen fuel supply pump according to an embodiment of the present invention configured as described above are as follows.

[0080] First, due to the magnetic poles generated between the permanent magnet (31) of the driving body (30) and the permanent magnet (51) of the driven body (50), the property of repelling or attracting each other acts, so when a power source is supplied to the driving motor (20), the driving body (30) rotates, and at the same time, the driven body (50) rotates to rotate the pump member (42) of the pump (40).

[0081] In this way, the pump (40) submerged in the liquid hydrogen (LH2) inside the liquid hydrogen tank (10) sucks in the liquid hydrogen (LH2) by the rotation of the pump member (42) and discharges it to the outside of the liquid hydrogen tank (10).

[0082]

[0083] In addition, the rotational power of the pump member (42) is maintained stably and continuously due to the arrangement characteristics of the permanent magnets (31) of the driving body (30) and the permanent magnets (51) of the driven body (50).

[0084] That is, the driving body (30) located within the insertion space (14) rotates by the rotational force of the driving motor (20), and at the same time, the driven body (50) fixed to the rotation axis of the pump member (42) and located within the liquid hydrogen tank (10) rotates by the repulsive force and attractive force caused by the magnetic force continuously acting between the permanent magnets (31) (51), thereby rotating the pump member (42) inside the pump (40) submerged in the liquid hydrogen (LH2) within the liquid hydrogen tank (10).

[0085] At this time, the insertion space (14) of the liquid hydrogen tank (10), in which the drive shaft (21) of the drive motor (20) and the driving body (30) are inserted, is formed as a vertically elongated cylinder with a closed bottom, and is composed of an inner tank (11) and an outer tank (12) similar to the liquid hydrogen tank (10), and has a vacuum insulation layer (13) formed between them. Due to this structural characteristic, heat generated from the drive motor (20) and external heat can be prevented from entering the liquid hydrogen tank (10) through the drive shaft (21) of the drive motor (20) and the driving body (30).

[0086] As a result, heat loss of the cryogenic liquid hydrogen (LH2) stored in the liquid hydrogen tank (10) is reduced, thereby suppressing the rise in temperature and pressure, and the generation and loss rate of evaporated gas due to the vaporization of the liquid hydrogen (LH2) can be minimized.

[0087] [Other forms for carrying out the invention]

[0088] A cryogenic storage container equipped with a liquid hydrogen fuel supply pump according to another embodiment of the present invention comprises a liquid hydrogen tank (10), a driving motor (20), a prime mover (30), a pump (40), a driven member (50), and a bracket (60), as shown in FIG. 3.

[0089] In particular, the pump (40) may be structured as a piston-type reciprocating pump in which a piston (47) inside a cylindrical cylinder (45) directly sucks in liquid hydrogen through reciprocating motion and discharges it under pressure.

[0090] Specifically, the pump (40) is configured to include a cylinder (45), a piston (47), a crank arm (48), and a connecting rod (49).

[0091] At the bottom of the cylinder (45), an intake port (45a) is formed for sucking in liquid hydrogen from the liquid hydrogen tank (10), and on the other side (opposite side), an exhaust port (45b) is formed for discharging liquid hydrogen.

[0092] And a suction valve (46a) for opening and closing the flow of liquid hydrogen is installed in the suction port (45a), and a discharge valve (46b) for opening and closing the flow of liquid hydrogen is installed in the discharge port (45b).

[0093] That is, when the piston (47) moves down or backward within the cylinder (45) to draw in liquid hydrogen from the liquid hydrogen tank (10), the suction valve (46a) is opened by the pressure of the liquid hydrogen (LH2) and the discharge valve (46b) remains closed. Conversely, when the piston (47) moves up or forward to push out the liquid hydrogen from the cylinder (45), the suction valve (46a) remains closed to prevent backflow of the liquid hydrogen (LH2) and the discharge valve (46b) is opened by the pressure of the liquid hydrogen (LH2), so the liquid hydrogen (LH2) inside the cylinder (45) can be naturally discharged to the discharge pipe (44) through the discharge port (45b).

[0094] The piston (47) reciprocates within the cylinder (45) and pressurizes and moves the liquid hydrogen.

[0095] The crank arm (48) is fixed to the central axis of the driven body (50) and rotates by the driven body (50).

[0096] The connecting rod (49) has its front end connected to the piston (47) by a pin joint and its rear end connected to the crank arm (48) by a pin joint.

[0097] That is, the connecting rod (49) serves to convert the rotational motion of the crank arm (48) into the linear reciprocating motion of the piston (47).

[0098] And the discharge pipe (44) is connected to the discharge port (45b).

[0099] Accordingly, the pump (40) moves in conjunction with the rotation of the driven body (50) so that the piston (47) reciprocates inside the cylinder (45), sucks in liquid hydrogen from the liquid hydrogen tank (10), pressurizes it, and sends it to the discharge pipe (44).

[0100] In this invention, among the components related to a cryogenic storage container equipped with a liquid hydrogen fuel supply pump according to another embodiment of the present invention, components having the same or similar functional effects as those in the above-described embodiment are given the same reference numerals, and a repetitive and detailed description thereof is omitted.

[0101] Meanwhile, it is obvious to those skilled in the art that the present invention is not limited by the embodiments described above and the attached drawings, and that it can be modified and applied in various ways not exemplified within the scope of the technical concept of the present invention, as well as widely applied by substituting each component and changing to equivalent alternative embodiments.

[0102] Therefore, content related to modifying and applying the technical features of the present invention should be interpreted as being included within the technical concept and scope of the present invention.

[0103] [Explanation of the symbol]

[0104] 10: Liquid hydrogen tank 11: Internal tank

[0105] 12: Outer frame 13: Vacuum insulation layer

[0106] 14: Insertion space 20: Driving motor

[0107] 21: Drive shaft 30: Prime mover

[0108] 31: Permanent magnet 40: Pump

[0109] 41: Casing 42: Pump component

[0110] 43: Suction pipe 44: Discharge pipe

[0111] 50: Follower 51: Permanent magnet

[0112] 60: bracket

Claims

1. A liquid hydrogen tank (10) having a vacuum insulation layer (13) formed between an inner tank (11) and an outer tank (12), and an insertion space (14) formed on one side that is narrow and deep inwardly. A drive motor (20) installed on the outside of the above liquid hydrogen tank (10) and generating rotational force when power is supplied; A driving body (30) that is attached to the end of the drive shaft (21) of the driving motor (20) and positioned within the insertion space (14), and rotated by the driving motor (20), and has a plurality of permanent magnets (31) arranged at equal angular intervals with alternating polarities around the drive shaft (21) of the driving motor (20); A pump (40) installed to be submerged in liquid hydrogen within the liquid hydrogen tank (10) and sucking in the liquid hydrogen within the liquid hydrogen tank (10) and pumping it to the outside of the liquid hydrogen tank (10) through a discharge pipe (44); and A driven member (50) that operates the pump (40) by rotating together with the magnetic force of the driven member (30), while being attached to the rotational shaft of the pump (40) and positioned around the end portion of the insertion space (14) within the liquid hydrogen tank (10), and having a plurality of permanent magnets (51) arranged at equal angular intervals with different polarities to correspond to the permanent magnets (31) of the driving member (30) around the driving shaft (21) of the driving motor (20); A cryogenic storage container equipped with a liquid hydrogen fuel supply pump, comprising 2. In Paragraph 1, A cryogenic storage container equipped with a liquid hydrogen fuel supply pump, wherein the insertion space (14) is formed as a vertically elongated cylindrical shape with a closed bottom so that heat generated from the drive motor (20) and external heat cannot enter the liquid hydrogen tank (10) through the drive shaft (21) of the drive motor (20) and the drive body (30), and a vacuum insulation layer (13) is formed between the inner tank (11) and the outer tank (12).

3. In Paragraph 2, A bracket (60) mounted around the end of the insertion space (14) inside the liquid hydrogen tank (10) to support the pump (40) and to install it so as to be submerged in the liquid hydrogen inside the liquid hydrogen tank (10); A cryogenic storage container equipped with a liquid hydrogen fuel supply pump, further comprising 4. In Paragraph 1, The above pump (40) is, Liquid hydrogen inside the liquid hydrogen tank (10) is sucked in through the suction pipe (43) by the centrifugal force generated when the pump member (42) rotates inside the casing (41), and is pumped out of the liquid hydrogen tank (10) through the discharge pipe (44). The above-mentioned follower (50) is, A cryogenic storage container equipped with a liquid hydrogen fuel supply pump, which is attached to the rotation axis of the pump member (42) and positioned around the end portion of the insertion space (14) inside the liquid hydrogen tank (10), and rotates the pump member (42) by rotating together with the magnetic force of the driving body (30).

5. In Paragraph 1, The above pump (40) is, A cylinder (45) having an intake port (45a) on one side for sucking in liquid hydrogen from the liquid hydrogen tank (10) and an exhaust port (45b) on the other side (opposite side) for discharging liquid hydrogen; A suction valve (46a) installed within the suction port (45a) to open and close the flow of liquid hydrogen; A discharge valve (46b) installed within the discharge port (45b) to open and close the flow of liquid hydrogen; A piston (47) that pressurizes and moves liquid hydrogen while reciprocating within the cylinder (45); A crank arm (48) that rotates while fixed to the central axis of the above-mentioned follower (50); and A connecting rod (49) having a front end connected to the piston (47) by a pin joint and a rear end connected to the crank arm (48) by a pin joint, which converts the rotational motion of the crank arm (48) into the linear reciprocating motion of the piston (47); Includes, A cryogenic storage container equipped with a liquid hydrogen fuel supply pump, wherein the discharge pipe (44) is connected to the discharge port (45b), and the piston (47) reciprocates in the cylinder (45) in conjunction with the rotation of the driven body (50) to suck in liquid hydrogen in the liquid hydrogen tank (10), pressurize it, and send it to the discharge pipe (44).

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