CN219299467U - Hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump - Google Patents
Hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump Download PDFInfo
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- CN219299467U CN219299467U CN202320241881.0U CN202320241881U CN219299467U CN 219299467 U CN219299467 U CN 219299467U CN 202320241881 U CN202320241881 U CN 202320241881U CN 219299467 U CN219299467 U CN 219299467U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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Abstract
The utility model provides a hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump, which comprises a mechanical transmission part, a liquid transmission part and a liquid pressurizing and conveying part, wherein the mechanical transmission part comprises a pump transmission box body assembly and a driving motor, and a crankshaft connecting rod mechanism and a cross head are arranged in the pump transmission box body assembly; the liquid transmission part comprises a blocking diaphragm, a piston rod, a connecting frame and a hydraulic end outer cylinder body, the pump transmission box assembly, the connecting frame and the hydraulic end outer cylinder body are sequentially connected, the blocking diaphragm is arranged in a connecting cavity of the connecting frame, the blocking diaphragm is connected with one end of the piston rod, and the other end of the piston rod is in sliding fit with the inner side wall of the first hydraulic oil cavity; the liquid pressurizing and conveying part comprises an inner cylinder body and a floating sealing head, and the floating sealing head is arranged in the inner cylinder body. The hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump can provide stable driving force by adopting hydraulic driving in the low-temperature liquid hydrogen conveying process, so that the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump is safer and more reliable.
Description
Technical Field
The utility model relates to the technical field of pump bodies, in particular to a hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump.
Background
Liquid hydrogen is a high-energy ultralow-temperature liquid fuel, and has higher advantages in energy storage density and transportation cost, so that the liquid hydrogen is increasingly valued as clean energy source in countries around the world, and has wider development prospect. And a liquid hydrogen pump for realizing liquid hydrogen delivery is one of the important devices in the liquid hydrogen industry. In the liquid hydrogen pump in the prior art, a piston impact mode is generally adopted to directly carry out pressurized conveying on liquid hydrogen, so that the impact is too large in the pump body operation process, and potential safety hazards of impact explosion exist.
Disclosure of Invention
The utility model aims to provide a hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump, which can solve the problems that the existing liquid hydrogen pump is too large in impact and has potential safety hazards in the operation process.
The utility model provides a hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump, which comprises:
the mechanical transmission part comprises a pump transmission box assembly and a driving motor, wherein a crankshaft connecting rod mechanism and a cross head are arranged in the pump transmission box assembly, the driving motor is in driving connection with the crankshaft connecting rod mechanism, and the crankshaft connecting rod mechanism is connected with the cross head;
the hydraulic transmission part comprises a blocking diaphragm, a piston rod, a connecting frame and a hydraulic end outer cylinder body, wherein the pump transmission box body assembly, the connecting frame and the hydraulic end outer cylinder body are sequentially connected, a first hydraulic oil chamber is arranged in the hydraulic end outer cylinder body, the connecting frame is provided with a connecting chamber, and the first hydraulic oil chamber is communicated with the connecting chamber; the blocking diaphragm is arranged in the connecting chamber, the blocking diaphragm is in sealing sliding fit with the inner side wall of the connecting chamber, one side of the blocking diaphragm is connected with the cross head, the other side of the blocking diaphragm is connected with one end of the piston rod, the other end of the piston rod extends into the first hydraulic oil chamber, and the piston rod is in sliding fit with the inner side wall of the first hydraulic oil chamber;
the liquid pressurizing and conveying part comprises an inner cylinder body and a floating sealing head, the inner cylinder body is arranged in the hydraulic end outer cylinder body, the floating sealing head is arranged in the inner cylinder body, the floating sealing head divides the inner cylinder body into a liquid hydrogen pressurizing and conveying chamber and a second hydraulic oil chamber, and the second hydraulic oil chamber is communicated with the first hydraulic oil chamber; and the hydraulic end outer cylinder body is respectively provided with a liquid hydrogen inlet and a liquid hydrogen outlet, and the liquid hydrogen inlet and the liquid hydrogen outlet are respectively communicated with the liquid hydrogen pressurizing and conveying chamber.
According to the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model, the crankshaft connecting rod mechanism comprises a crankshaft and a connecting rod, the crankshaft is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the cross head; the crankshaft is an N-type shaft or a crank shaft or an eccentric wheel shaft.
According to the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model, the outer end of the crankshaft extends out of the pump transmission box assembly, the outer end of the crankshaft is fixedly provided with the transmission belt wheel, the power output shaft of the driving motor is fixedly provided with the driving belt wheel, and the driving belt wheel is connected with the transmission belt wheel through the transmission belt.
According to the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model, the stroke adjusting mechanism for adjusting the stroke of the crankshaft connecting rod mechanism is arranged on the crankshaft connecting rod mechanism.
According to the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model, the leakage alarm is arranged on the outer cylinder body of the hydraulic end at the position corresponding to the first hydraulic oil chamber.
According to the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model, the outer cylinder body of the hydraulic end comprises an outer cylinder body front part and an outer cylinder body rear part which are connected with each other, and the first hydraulic oil chamber and the inner cylinder body are arranged at the outer cylinder body rear part; the liquid hydrogen inlet is arranged at the front part of the outer cylinder body, and the liquid hydrogen outlet is arranged at the rear part of the outer cylinder body; the leakage alarm is installed at the rear of the outer cylinder.
The utility model provides a hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump, which further comprises a precooling device, wherein the precooling device comprises a precooling medium circulating pump, a precooling medium liquid inlet pipe and a precooling medium liquid outlet pipe, a precooling medium channel is arranged in an outer cylinder body of a hydraulic end, the precooling medium channel is arranged on the periphery of an inner cylinder body, two ends of the precooling medium liquid inlet pipe are respectively and correspondingly connected with the precooling medium circulating pump and the precooling medium channel, and two ends of the precooling medium liquid outlet pipe are respectively and correspondingly connected with the precooling medium circulating pump and the precooling medium channel.
According to the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model, the driving motor is supported and fixed on the first mounting seat, the pump transmission box assembly is fixed on the second mounting seat, and the hydraulic end outer cylinder is supported and fixed on the bracket.
According to the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model, the first mounting seat, the second mounting seat and the bracket are all mounted on the mounting bottom plate.
According to the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model, the driving motor is a variable frequency motor.
The utility model provides a hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump, which comprises a mechanical transmission part, a liquid transmission part and a liquid pressurizing and conveying part, wherein the mechanical transmission part comprises a pump transmission box body assembly and a driving motor, a crankshaft connecting rod mechanism and a cross head are arranged in the pump transmission box body assembly, the driving motor is in driving connection with the crankshaft connecting rod mechanism, and the crankshaft connecting rod mechanism is connected with the cross head; that is, the crank link mechanism can be driven to move by the driving motor, and the cross head can be driven to reciprocate by the crank link mechanism, so that stroke reciprocation is realized through motion transmission; wherein the liquid transmission part comprises a blocking diaphragm, a piston rod, a connecting frame and a hydraulic end outer cylinder body, the pump transmission box body assembly, the connecting frame and the hydraulic end outer cylinder body are connected in sequence, the hydraulic end outer cylinder body is internally provided with a first hydraulic oil chamber, the connecting frame is provided with a connecting chamber, and the first hydraulic oil chamber is communicated with the connecting chamber; the blocking diaphragm is arranged in the connecting chamber, can be in sealing sliding fit with the inner side wall of the connecting chamber, one side of the blocking diaphragm is connected with the cross head, the other side of the blocking diaphragm is connected with one end of the piston rod, the other end of the piston rod extends into the first hydraulic oil chamber, and the piston rod is in sliding fit with the inner side wall of the first hydraulic oil chamber; that is, the reciprocating motion can be applied to the first hydraulic oil chamber of the outer cylinder of the fluid end through the piston rod, thereby pressurizing the hydraulic oil therein; the liquid pressurizing and conveying part comprises an inner cylinder body and a floating sealing head, the inner cylinder body is arranged in the outer cylinder body of the hydraulic end, the floating sealing head is arranged in the inner cylinder body, the floating sealing head can divide the inner cylinder body into a liquid hydrogen pressurizing and conveying chamber and a second hydraulic oil chamber, and the second hydraulic oil chamber is communicated with the first hydraulic oil chamber; namely, by pressurizing the hydraulic oil, the floating sealing head can be pushed, so that the pressurized transportation of the liquid hydrogen in the liquid hydrogen pressurized transportation chamber is realized; the hydraulic end outer cylinder body is respectively provided with a liquid hydrogen inlet and a liquid hydrogen outlet, and the liquid hydrogen inlet and the liquid hydrogen outlet are respectively communicated with the liquid hydrogen pressurizing and conveying chamber. When the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump works, liquid hydrogen is conveyed into a liquid hydrogen conveying cavity through a liquid hydrogen inlet, a driving motor is started, a cross head can be driven to reciprocate through a crankshaft connecting rod mechanism, the reciprocating motion of the cross head can drive a blocking diaphragm to reciprocate, the reciprocating motion of the blocking diaphragm can drive a piston rod to reciprocate, hydraulic oil in a first hydraulic oil cavity and a second hydraulic oil cavity can be pushed to move through the reciprocating motion of the piston rod, then a floating sealing head is pushed to float through hydraulic oil, further pressurized conveying of the liquid hydrogen in the liquid hydrogen conveying cavity is realized through floating of a floating sealing head, and the liquid hydrogen in the liquid hydrogen conveying cavity is discharged through a liquid hydrogen outlet; in the process, liquid hydrogen and hydraulic oil can be isolated through the floating sealing head, and the hydraulic oil and engine oil can be isolated through the blocking diaphragm. Therefore, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the utility model adopts hydraulic driving to provide stable driving force in the low-temperature liquid hydrogen conveying process, realizes flexible driving of liquid hydrogen, reliably ensures the safety of liquid hydrogen use, and avoids hidden danger of explosion caused by impact.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a hydraulic reciprocating high-temperature high-pressure liquid hydrogen pump of the present utility model;
FIG. 2 is a first isometric view of a hydraulic reciprocating high-pressure liquid hydrogen pump of the present utility model;
fig. 3 is a second axial view of the hydraulic reciprocating high-pressure liquid hydrogen pump of the present utility model.
Reference numerals illustrate:
1. a pump drive housing assembly; 2. a driving motor; 3. a crankshaft connecting rod mechanism; 4. a cross head; 5. a fluid end outer cylinder; 51. a liquid hydrogen inlet; 52. a liquid hydrogen outlet; 501. a first hydraulic oil chamber; 6. an inner cylinder; 601. a liquid hydrogen pressurized delivery chamber; 602. a second hydraulic oil chamber; 7. a connecting frame; 701. a connecting chamber; 8. a piston rod; 9. a floating seal head; 10. blocking the membrane; 11. a transmission belt wheel; 12. a driving belt wheel; 13. a transmission belt; 14. a leak alarm; 15. a precooling medium circulation pump; 16. a precooling medium liquid inlet pipe; 17. precooling the medium liquid outlet pipe; 18. a pre-cooling medium channel; 19. a first mount; 20. a second mounting base; 21. a bracket; 22. and (5) mounting a bottom plate.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 3, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump of the embodiment of the present utility model includes a mechanical transmission part, a liquid transmission part, and a liquid pressurization and transportation part. In the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump, the low temperature is lower than-100 ℃, and the high pressure is higher than 50MPa.
The mechanical transmission part comprises a pump transmission box assembly 1 and a driving motor 2, wherein a crankshaft connecting rod mechanism 3 and a cross head 4 are arranged in the pump transmission box assembly 1, the driving motor 2 is in driving connection with the crankshaft connecting rod mechanism 3, and the crankshaft connecting rod mechanism 3 is connected with the cross head 4. That is, the crank link mechanism 3 can be driven to move by the driving motor 2, and the crosshead 4 can be driven to reciprocate by the crank link mechanism 3, thereby achieving stroke reciprocation by motion transmission. Wherein engine oil is arranged in the pump transmission box assembly 1 and is used for providing lubrication for the movement of the crankshaft connecting rod mechanism 3 and the cross head 4 in the pump transmission box assembly 1.
The liquid transmission part comprises a hydraulic end outer cylinder body 5, a connecting frame 7, a piston rod 8 and a blocking diaphragm 10, wherein the pump transmission box body assembly 1, the connecting frame 7 and the hydraulic end outer cylinder body 5 are sequentially connected, a first hydraulic oil chamber 501 is arranged in the hydraulic end outer cylinder body 5, the connecting frame 7 is provided with a connecting chamber 701, the first hydraulic oil chamber 501 is communicated with the connecting chamber 701, and the connecting chamber 701 is communicated with the inside of the pump transmission box body assembly 1. The blocking diaphragm 10 is arranged in the connecting chamber 701, the blocking diaphragm 10 is in sealing sliding fit with the inner side wall of the connecting chamber 701, one side of the blocking diaphragm 10 is connected with the cross head 4, the other side of the blocking diaphragm 10 is connected with one end of the piston rod 8, the other end of the piston rod 8 extends into the first hydraulic oil chamber 501, and the piston rod 8 is in sliding fit with the inner side wall of the first hydraulic oil chamber 501. The blocking diaphragm 10 can be driven to reciprocate by the reciprocation of the cross head 4, so that the piston rod 8 is driven to reciprocate synchronously, and then the piston rod 8 can act on the reciprocation in the first hydraulic oil chamber 501, so that the hydraulic oil in the first hydraulic oil chamber 501 is pressurized.
The liquid pressurization conveying part comprises an inner cylinder body 6 and a floating sealing head 9, wherein the inner cylinder body 6 is arranged in the hydraulic end outer cylinder body 5, the floating sealing head 9 is arranged in the inner cylinder body 6, the floating sealing head 9 can divide the inner cylinder body 6 into a liquid hydrogen pressurization conveying chamber 601 and a second hydraulic oil chamber 602, two mutually independent and sealed chambers are arranged between the liquid hydrogen pressurization conveying chamber 601 and the second hydraulic oil chamber 602, and the second hydraulic oil chamber 602 is communicated with the first hydraulic oil chamber 501. Since the second hydraulic oil chamber 602 and the first hydraulic oil chamber 501 are provided with hydraulic oil, the hydraulic hydrogen pressurizing and conveying chamber 601 is used for conveying the hydraulic hydrogen, so that the hydraulic hydrogen and the hydraulic oil can be effectively separated through the floating sealing head 9, and the problem of contact explosion of the hydraulic hydrogen and the hydraulic oil is avoided. That is, the hydraulic oil can be pressurized by the reciprocating movement of the piston rod 8, thereby pushing the floating seal head 9 to float, and further pressurized delivery of the liquid hydrogen in the liquid hydrogen pressurized delivery chamber 601 is achieved by the float of the floating seal head 9.
Wherein, a liquid hydrogen inlet 51 and a liquid hydrogen outlet 52 are respectively arranged on the hydraulic end outer cylinder body 5, and the liquid hydrogen inlet 51 and the liquid hydrogen outlet 52 are respectively communicated with the liquid hydrogen pressurizing and conveying chamber 601. That is, liquid hydrogen can enter the liquid hydrogen delivery chamber 601 from the liquid hydrogen inlet 51 and be discharged through the liquid hydrogen outlet 52.
When the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump disclosed by the embodiment of the utility model works, liquid hydrogen is conveyed into the liquid hydrogen conveying chamber 601 through the liquid hydrogen inlet 51, the driving motor 2 is started, the cross head 4 can be driven to reciprocate through the crankshaft connecting rod mechanism 3, the blocking diaphragm 10 can be driven to reciprocate by the reciprocating motion of the cross head 4, the piston rod 8 can be driven to reciprocate by the reciprocating motion of the blocking diaphragm 10, the hydraulic oil in the first hydraulic oil chamber 501 and the second hydraulic oil chamber 602 can be driven to reciprocate through the reciprocating motion of the piston rod 8, the floating sealing head 9 is driven to float through the hydraulic oil, further, the pressurized conveying of the liquid hydrogen in the liquid hydrogen conveying chamber 601 is realized through the floating of the floating sealing head 9, and further, the liquid hydrogen in the liquid hydrogen conveying chamber 601 is discharged through the liquid hydrogen outlet 52.
In an ideal situation, the piston rod 8 is required to be in sliding sealing engagement with the inner side wall of the first hydraulic oil chamber 501, so as to ensure a pushing squeeze of the hydraulic oil in the first hydraulic oil chamber 501. However, in practical use, it is difficult for the piston rod 8 to achieve a complete seal with the first hydraulic oil chamber 501, so that a small amount of hydraulic oil enters the interior of the connection chamber 701. Therefore, the hydraulic oil in the connection chamber 701 and the engine oil in the pump transmission case assembly 1 can be effectively blocked by providing the blocking diaphragm 10.
Therefore, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the embodiment of the utility model adopts hydraulic driving to provide stable driving force in the low-temperature liquid hydrogen conveying process, realizes flexible driving of liquid hydrogen, reliably ensures the safety of liquid hydrogen use, and avoids hidden danger of explosion caused by impact.
Specifically, the fluid end outer cylinder 5 and the inner cylinder 6 constitute a fluid end assembly. According to actual use requirements, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the embodiment of the utility model can be arranged into a single-cylinder structure, a double-cylinder structure or more than two multi-cylinder structures.
When the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump is arranged into a single-cylinder structure, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump comprises a hydraulic end assembly, the hydraulic end assembly is connected with a pump transmission box body assembly 1 through a connecting frame 7, and a crankshaft connecting rod mechanism 3 and a cross head 4 are arranged in the pump transmission box body assembly 1 to be matched, as shown in fig. 1.
When the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump is set to be of a double-cylinder structure, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump comprises two hydraulic end assemblies, the two hydraulic end assemblies are respectively and correspondingly connected with two connecting frames 7, the two connecting frames 7 are respectively connected with the pump transmission box body assembly 1, then two crankshaft connecting rod mechanisms and two cross heads are arranged in the pump transmission box body assembly 1 to be matched, the two crankshaft connecting rod mechanisms are coaxially arranged, the two cross heads are respectively and correspondingly connected with two piston rods, hydraulic oil in the two hydraulic end outer cylinders 5 is correspondingly pushed through the two piston rods, and accordingly pressurized conveying of liquid hydrogen in the two inner cylinders is respectively achieved, as shown in fig. 2 and 3.
In some embodiments of the utility model, the crankshaft linkage 3 comprises a crankshaft and a connecting rod, the crankshaft being connected to one end of the connecting rod, the other end of the connecting rod being connected to the crosshead 4. The crankshaft connecting rod mechanism 3 can adopt the existing structural form, and the connecting mode of the crankshaft connecting rod mechanism 3 and the cross head 4 also adopts the connecting mode of the prior art.
Specifically, the crankshaft of the crankshaft connecting rod mechanism 3 may be an N-type shaft or a crank shaft or an eccentric shaft according to actual use requirements.
Specifically, the outer end of the crankshaft extends out of the pump transmission box assembly 1, a transmission belt pulley 11 is fixedly arranged at the outer end of the crankshaft, a driving belt pulley 12 is fixedly arranged on a power output shaft of the driving motor 2, and the driving belt pulley 12 is connected with the transmission belt pulley 11 through a transmission belt 13. That is, the drive motor 2 transmits power to the crankshaft through the transmission belt 13, and then drives the connecting rod to move through the crankshaft, thereby achieving the drive of the crankshaft connecting rod mechanism 3 by the drive motor 2.
In some embodiments of the present utility model, a stroke adjustment mechanism (not shown in the figure) for adjusting the stroke of the crankshaft connecting rod mechanism 3 is further installed on the crankshaft connecting rod mechanism 3, and the stroke adjustment mechanism adopts an N-type shaft stroke adjustment mechanism in the prior art, and the stroke of the crankshaft connecting rod mechanism 3, and thus the stroke of the piston rod 8, can be adjusted by the N-type shaft stroke adjustment mechanism, so that the adjustment of the flow of liquid hydrogen is realized.
In addition, in the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the embodiment of the utility model, the driving motor 2 adopts the variable frequency motor, and the liquid hydrogen flow can be regulated by regulating the rotating speed due to the variable frequency characteristic of the variable frequency motor.
Therefore, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the embodiment of the utility model realizes the double metering and adjusting functions of conveying liquid hydrogen through the variable frequency motor and the N-type shaft stroke adjusting mechanism, thereby achieving the effect of accurately controlling the flow of the liquid hydrogen. Therefore, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump can be directly applied to charging, and the working procedure and the loss of liquid hydrogen are saved.
In some embodiments of the present utility model, a leak alarm 14 is installed on the fluid-end outer cylinder 5 at a position corresponding to the first hydraulic oil chamber 501. When the hydraulic oil in the first hydraulic oil chamber 501 leaks, the leakage alarm 14 gives an alarm, and then the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump is controlled to stop running immediately, so that the safe running of the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump is further ensured.
Specifically, the fluid-end outer cylinder 5 includes an outer cylinder front portion and an outer cylinder rear portion that are connected to each other, and the first hydraulic oil chamber 501 and the inner cylinder 6 are both provided at the outer cylinder rear portion. Wherein the liquid hydrogen inlet 51 is provided at the front of the outer cylinder and the liquid hydrogen outlet 52 is provided at the rear of the outer cylinder. Leak alarm 14 is mounted to the rear of the outer housing.
Since the temperature of the liquid hydrogen is-253 ℃, in some embodiments of the present utility model, the hydraulic reciprocating low temperature high pressure liquid hydrogen pump further comprises a pre-cooling device for providing pre-cooling to the hydraulic reciprocating low temperature high pressure liquid hydrogen pump prior to operation.
The hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump further comprises a precooling device, the precooling device comprises a precooling medium circulating pump 15, a precooling medium liquid inlet pipe 16 and a precooling medium liquid outlet pipe 17, a precooling medium channel 18 is arranged in the outer cylinder body 5 of the hydraulic end, the precooling medium channel 18 is arranged on the periphery of the inner cylinder body 6, two ends of the precooling medium liquid inlet pipe 16 are respectively and correspondingly connected with the precooling medium circulating pump 15 and the precooling medium channel 18, and two ends of the precooling medium liquid outlet pipe 17 are respectively and correspondingly connected with the precooling medium circulating pump 15 and the precooling medium channel 18. When in precooling, a precooling medium enters a precooling medium channel 18 through a precooling medium liquid inlet pipe 16 to precool the outer cylinder body 5 and the inner cylinder body 6 of the hydraulic end, and then the precooling medium in the precooling medium channel 18 is output through a precooling medium liquid outlet pipe 17, and the circulating flow of the precooling medium can be realized through a precooling medium circulating pump 15. Therefore, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump reduces the working temperature by adopting a mode of pre-cooling and then working in low-temperature liquid hydrogen conveying.
According to the actual use requirement, the precooling medium can adopt liquid helium or liquid nitrogen. Of these, liquid helium is desirable, but in view of its high price, it is preferred to use more economical liquid nitrogen in this embodiment. Although the temperature of the liquid nitrogen can not reach the liquefaction temperature of the liquid hydrogen, the aim of precooling can be fulfilled, the extremely low loss temperature of the liquid hydrogen is ensured, the liquid hydrogen can be quickly liquefied after the liquid hydrogen pump works for a few minutes, and the normal work is realized.
In addition, conventional cryogenic liquid pumps are not gas-delivering due to sealing problems, and once liquid hydrogen vaporization occurs, conventional cryogenic liquid pumps cannot vent the internal vaporized gas at all. However, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the embodiment of the utility model adopts the sealing structure of the existing compressor, so that the pressurization and the transportation of gas can be realized. Once the liquid hydrogen is vaporized, the liquid can be easily discharged through the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump, and the phenomenon that the liquid behind the pump cannot enter the pump due to vaporization is prevented. That is, the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump provided by the embodiment of the utility model can realize the dual conveying function of gas and liquid, so that the problem of equipment cost can be effectively solved for a using unit.
In some embodiments of the present utility model, the driving motor 2 is supported and fixed on the first mounting seat 19, the pump transmission box assembly 1 is fixed on the second mounting seat 20, and the hydraulic end outer cylinder 5 is supported and fixed on the bracket 21. The first mounting seat 19, the second mounting seat 20 and the bracket 21 are all mounted on the mounting base plate 22. That is, by providing the first mount 19, the second mount 20, the bracket 21 and the mount base 22, the mounting and fixing of the hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump is realized, and the whole movement is facilitated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. A hydraulic reciprocating low temperature high pressure liquid hydrogen pump comprising:
the mechanical transmission part comprises a pump transmission box assembly and a driving motor, wherein a crankshaft connecting rod mechanism and a cross head are arranged in the pump transmission box assembly, the driving motor is in driving connection with the crankshaft connecting rod mechanism, and the crankshaft connecting rod mechanism is connected with the cross head;
the hydraulic transmission part comprises a blocking diaphragm, a piston rod, a connecting frame and a hydraulic end outer cylinder body, wherein the pump transmission box body assembly, the connecting frame and the hydraulic end outer cylinder body are sequentially connected, a first hydraulic oil chamber is arranged in the hydraulic end outer cylinder body, the connecting frame is provided with a connecting chamber, and the first hydraulic oil chamber is communicated with the connecting chamber; the blocking diaphragm is arranged in the connecting chamber, the blocking diaphragm is in sealing sliding fit with the inner side wall of the connecting chamber, one side of the blocking diaphragm is connected with the cross head, the other side of the blocking diaphragm is connected with one end of the piston rod, the other end of the piston rod extends into the first hydraulic oil chamber, and the piston rod is in sliding fit with the inner side wall of the first hydraulic oil chamber;
the liquid pressurizing and conveying part comprises an inner cylinder body and a floating sealing head, the inner cylinder body is arranged in the hydraulic end outer cylinder body, the floating sealing head is arranged in the inner cylinder body, the floating sealing head divides the inner cylinder body into a liquid hydrogen pressurizing and conveying chamber and a second hydraulic oil chamber, and the second hydraulic oil chamber is communicated with the first hydraulic oil chamber; and the hydraulic end outer cylinder body is respectively provided with a liquid hydrogen inlet and a liquid hydrogen outlet, and the liquid hydrogen inlet and the liquid hydrogen outlet are respectively communicated with the liquid hydrogen pressurizing and conveying chamber.
2. The hydraulic reciprocating low temperature high pressure liquid hydrogen pump of claim 1 wherein said crankshaft linkage comprises a crankshaft and a connecting rod, said crankshaft being connected to one end of said connecting rod, the other end of said connecting rod being connected to said crosshead; the crankshaft is an N-type shaft or a crank shaft or an eccentric wheel shaft.
3. The hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump according to claim 2, wherein the outer end of the crankshaft extends out of the pump transmission box assembly, a transmission belt wheel is fixedly arranged at the outer end of the crankshaft, a driving belt wheel is fixedly arranged on a power output shaft of the driving motor, and the driving belt wheel is connected with the transmission belt wheel through a transmission belt.
4. The hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump according to claim 1, characterized in that a stroke adjusting mechanism for adjusting the stroke of the crankshaft connecting rod mechanism is mounted on the crankshaft connecting rod mechanism.
5. The hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump according to claim 1, characterized in that a leak alarm is installed on the fluid-end outer cylinder at a position corresponding to the first hydraulic oil chamber.
6. The hydraulic reciprocating low temperature high pressure liquid hydrogen pump of claim 5 wherein said fluid end outer cylinder includes an outer cylinder front and an outer cylinder rear connected to each other, said first hydraulic oil chamber and said inner cylinder being disposed at said outer cylinder rear; the liquid hydrogen inlet is arranged at the front part of the outer cylinder body, and the liquid hydrogen outlet is arranged at the rear part of the outer cylinder body; the leakage alarm is installed at the rear of the outer cylinder.
7. The hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump according to claim 1, further comprising a precooling device, wherein the precooling device comprises a precooling medium circulating pump, a precooling medium liquid inlet pipe and a precooling medium liquid outlet pipe, a precooling medium channel is arranged in the outer cylinder of the hydraulic end, the precooling medium channel is arranged on the periphery of the inner cylinder, two ends of the precooling medium liquid inlet pipe are respectively and correspondingly connected with the precooling medium circulating pump and the precooling medium channel, and two ends of the precooling medium liquid outlet pipe are respectively and correspondingly connected with the precooling medium circulating pump and the precooling medium channel.
8. The hydraulic reciprocating low temperature high pressure liquid hydrogen pump of any one of claims 1 to 7 wherein said drive motor is supported and secured to a first mount, said pump drive housing assembly is secured to a second mount, and said fluid end outer housing is supported and secured to a bracket.
9. The hydraulic reciprocating low temperature, high pressure liquid hydrogen pump of claim 8 wherein said first mount, said second mount and said bracket are all mounted on a mounting base plate.
10. The hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump according to any one of claims 1 to 7, characterized in that the driving motor is a variable frequency motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320241881.0U CN219299467U (en) | 2023-02-16 | 2023-02-16 | Hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320241881.0U CN219299467U (en) | 2023-02-16 | 2023-02-16 | Hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump |
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| Publication Number | Publication Date |
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| CN219299467U true CN219299467U (en) | 2023-07-04 |
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| CN202320241881.0U Active CN219299467U (en) | 2023-02-16 | 2023-02-16 | Hydraulic reciprocating low-temperature high-pressure liquid hydrogen pump |
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| CN (1) | CN219299467U (en) |
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