CN113898553A - Swing piston type hydrogen compression cylinder and hydrogen compression system - Google Patents

Swing piston type hydrogen compression cylinder and hydrogen compression system Download PDF

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Publication number
CN113898553A
CN113898553A CN202111040628.0A CN202111040628A CN113898553A CN 113898553 A CN113898553 A CN 113898553A CN 202111040628 A CN202111040628 A CN 202111040628A CN 113898553 A CN113898553 A CN 113898553A
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China
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hydrogen
cylinder
piston
cylinder sleeve
piston rod
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CN202111040628.0A
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Chinese (zh)
Inventor
吴蔚
侯普东
李琳
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Harbin Pufa New Energy Equipment Technology Co ltd
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Harbin Pufa New Energy Equipment Technology Co ltd
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Priority to CN202111040628.0A priority Critical patent/CN113898553A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/02—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders arranged oppositely relative to main shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B25/00—Multi-stage pumps
    • F04B25/005—Multi-stage pumps with two cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/005—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders with two cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/18—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use for specific elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122—Cylinder block

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

A swing piston type hydrogen compression cylinder and a hydrogen compression system belong to the technical field of hydrogen compressor equipment. The invention solves the problems that the existing hydraulic piston type hydrogen compression equipment has a complex structure, more friction pairs and is easy to pollute gas. Just through first piston rod rigid coupling between two first pistons first piston rod runs through first cylinder liner, connects casing and second cylinder liner setting, and the middle part of first piston rod has along its axial processing to be the first meshing tooth of rack form, the gear shaft is installed connect the casing in and control its circumferential direction through actuating mechanism, the gear shaft with the meshing of first meshing tooth on the first piston rod, and then control first piston rod reciprocating motion, every cylinder liner with connect all to be connected through first cylinder base between the casing, and sealed the setting between first piston rod and the first cylinder base, the cavity of every first piston both sides is hydrogen chamber and nitrogen gas chamber respectively, and hydrogen exports after two first piston compression.

Description

Swing piston type hydrogen compression cylinder and hydrogen compression system
Technical Field
The invention relates to a swing piston type hydrogen compression cylinder and a hydrogen compression system, and belongs to the technical field of hydrogen compressor equipment.
Background
Most of hydraulic piston type hydrogen compressors in the prior art are compressed by directly driving a cylinder by a hydraulic cylinder, and a piston rod of the compression cylinder not only passes through an oil cylinder, but also passes through the cylinder, so that the leakage of hydraulic oil and polluted gas easily occurs. In addition, the hydrogen compression is realized through a crank connecting rod type compressor, so that the device has the advantages of multiple parts, complex structure, multiple friction pairs, large overhauling workload and high maintenance cost.
Disclosure of Invention
The invention aims to solve the problems that the existing hydraulic piston type hydrogen compression equipment is complex in structure, has more friction pairs and is easy to pollute gas, and further provides a swing piston type hydrogen compression cylinder and a hydrogen compression system.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a swing piston type hydrogen compression cylinder comprises a first cylinder sleeve, a second cylinder sleeve, a connecting shell and a gear shaft, wherein two ends of the connecting shell are respectively communicated with the first cylinder sleeve and the second cylinder sleeve, a first piston is respectively arranged in each cylinder sleeve, the two first pistons are fixedly connected through a first piston rod, the first piston rod penetrates through the first cylinder sleeve, the connecting shell and the second cylinder sleeve, rack-shaped first meshing teeth are machined in the middle of the first piston rod along the axial direction of the first piston rod, the gear shaft is installed in the connecting shell and is controlled to rotate circumferentially through a driving mechanism, the gear shaft is meshed with the first meshing teeth on the first piston rod so as to control the first piston rod to move in a reciprocating manner, each cylinder sleeve is connected with the connecting shell through a first cylinder seat, and the first piston rod is hermetically arranged with the first cylinder seat, the cavities on the two sides of each first piston are respectively a hydrogen cavity and a nitrogen cavity, and hydrogen is compressed by the two first pistons and then output.
Furthermore, the oscillating piston type hydrogen compression cylinder also comprises a third cylinder sleeve and a fourth cylinder sleeve which are correspondingly communicated and arranged at the two ends of the connecting shell, wherein a second piston is respectively arranged in the third cylinder sleeve and the fourth cylinder sleeve, the two second pistons are fixedly connected through a second piston rod, the second piston rod penetrates through the third cylinder sleeve, the connecting shell and the fourth cylinder sleeve, the first piston rod and the second piston rod are respectively arranged at the two sides of the gear shaft, third rack-shaped meshing teeth are processed in the middle of the second piston rod along the axial direction of the second piston rod, the two piston rods are simultaneously controlled to reciprocate through the meshing of the gear shaft and the first meshing teeth as well as the third meshing teeth, the third cylinder sleeve and the connecting shell as well as the fourth cylinder sleeve and the connecting shell are correspondingly connected through a second cylinder base, and the second piston rod and the second cylinder base are arranged in a sealing way, the cavities on the two sides of each second piston are respectively a hydrogen cavity and a nitrogen cavity, and hydrogen is compressed by the two second pistons and then output.
Furthermore, the driving mechanism is a hydraulic motor, and the output end of the hydraulic motor is coaxially and fixedly connected with the gear shaft.
Furthermore, the driving mechanism is a hydraulic cylinder, the hydraulic cylinder comprises a hydraulic cylinder sleeve, cylinder covers fixedly arranged at two ends of the hydraulic cylinder sleeve and a hydraulic piston shaft coaxially arranged in the hydraulic cylinder sleeve, wherein the middle part of the hydraulic cylinder sleeve is communicated with the connecting shell, a second toothed tooth is machined in the middle of the hydraulic piston shaft along the axial direction of the hydraulic piston shaft, the gear shaft is positioned between the first piston rod and the hydraulic piston shaft and is simultaneously meshed with the first toothed tooth and the second toothed tooth, and hydraulic oil enters the hydraulic cylinder sleeve through the two cylinder covers to push the hydraulic piston shaft to move in a reciprocating manner so as to control the first piston rod to move in a reciprocating manner.
Furthermore, each hydrogen inlet and each compressed hydrogen outlet of the hydrogen compression cylinder are provided with one-way valves to control the inlet or outlet of hydrogen.
Furthermore, a cylinder head is respectively and hermetically mounted at one end of each cylinder sleeve far away from the connecting shell. Further, a travel switch is mounted in each cylinder head.
Furthermore, the outside of each piston is coaxially sleeved with a piston ring and a first wear-resistant ring along the axial direction of the piston, an O-shaped ring is arranged between each cylinder sleeve and the corresponding cylinder seat, and a rod sealing ring and a second wear-resistant ring are arranged between each piston rod and the cylinder seat along the axial direction of the piston rod.
A hydrogen compression system adopting the swing piston type hydrogen compression cylinder adopts a hydraulic motor as a driving mechanism,
when the hydrogen compression cylinder is single-row and the inner diameters of the first cylinder sleeve and the second cylinder sleeve are the same, hydrogen respectively enters the hydrogen cavities at the two ends of the first piston rod through the two first check valves, is correspondingly compressed by the two first pistons and then is correspondingly output by the two second check valves, and primary compression of the hydrogen is realized;
when the hydrogen compression cylinder is single-row and the inner diameter of the second cylinder sleeve is smaller than that of the first cylinder sleeve, hydrogen enters the hydrogen cavity at one end of the first piston rod through the third one-way valve, is subjected to primary compression by the first piston in the first cylinder sleeve, sequentially enters the hydrogen cavity at the other end of the first piston rod through the fourth one-way valve, the filter and the fifth one-way valve, is subjected to secondary compression by the first piston in the second cylinder sleeve, and is output by the sixth one-way valve, so that the two-stage compression of the hydrogen is realized;
when the hydrogen compression cylinder is double-row and the inner diameters of the cylinder sleeves are the same, hydrogen enters the hydrogen cavities at the two ends of the first piston rod and the hydrogen cavities at the two ends of the second piston rod through the four seventh one-way valves respectively, is compressed by the two first pistons and the two second pistons correspondingly, and is output by the four eighth one-way valves correspondingly, so that primary compression of the hydrogen is realized;
when the hydrogen compression cylinders are double rows, the inner diameter of the first cylinder sleeve is smaller than that of the second cylinder sleeve, and the inner diameter of the fourth cylinder sleeve is smaller than that of the third cylinder sleeve, hydrogen enters the hydrogen cavity at one end of the second piston rod through the ninth one-way valve, is subjected to primary compression by the second piston in the third cylinder sleeve, sequentially enters the hydrogen cavity at the other end of the second piston rod through the tenth one-way valve, the filter and the eleventh one-way valve, is subjected to secondary compression by the second piston in the fourth cylinder sleeve, and is output through the twelfth one-way valve, so that two-stage compression of one row of hydrogen compression cylinders is realized; hydrogen enters the hydrogen cavity at the other end of the first piston rod through the thirteenth one-way valve, enters the hydrogen cavity at one end of the first piston rod through the first piston in the second cylinder sleeve after being subjected to primary compression, sequentially enters the hydrogen cavity at one end of the first piston rod through the fourteenth one-way valve, the filter and the fifteenth one-way valve, is subjected to secondary compression through the first piston in the first cylinder sleeve, and is output through the sixteenth one-way valve, so that the two-stage compression of the other row of hydrogen compression cylinders is realized;
when the hydrogen compression cylinder is double-row, the inner diameter of the first cylinder sleeve is smaller than that of the second cylinder sleeve, and the inner diameter of the fourth cylinder sleeve is smaller than that of the third cylinder sleeve, hydrogen enters the hydrogen cavity at one end of the second piston rod through the seventeenth one-way valve, enters the hydrogen cavity at the other end of the second piston rod through the eighteenth one-way valve, the filter and the nineteenth one-way valve after being subjected to primary compression by the second piston in the third cylinder sleeve, enters the hydrogen cavity at the other end of the first piston rod through the twentieth one-way valve, the filter and the twenty-first one-way valve after being subjected to secondary compression by the second piston in the fourth cylinder sleeve, enters the hydrogen cavity at one end of the first piston rod through the twentieth one-way valve, the filter and the twenty-third one-way valve after being subjected to tertiary compression by the first piston in the second cylinder sleeve, and then enters the hydrogen cavity at one end of the first piston in the first cylinder sleeve after being subjected to quaternary compression by the first piston in the first cylinder sleeve, four-stage compression of hydrogen is achieved via the twenty-fourth one-way valve output.
When the inner diameters of a first cylinder sleeve and a second cylinder sleeve are the same, hydrogen respectively enters hydrogen cavities at two ends of a first piston rod through two first one-way valves, is correspondingly compressed by two first pistons and then is correspondingly output by two second one-way valves, and primary compression of the hydrogen is realized;
when the inner diameter of the second cylinder sleeve is smaller than that of the first cylinder sleeve, hydrogen enters the hydrogen cavity at one end of the first piston rod through the third one-way valve, is subjected to primary compression through the first piston in the first cylinder sleeve, sequentially enters the hydrogen cavity at the other end of the first piston rod through the fourth one-way valve, the filter and the fifth one-way valve, is subjected to secondary compression through the first piston in the second cylinder sleeve, and is output through the sixth one-way valve, so that the two-stage compression of the hydrogen is realized.
Compared with the prior art, the invention has the following effects:
first piston rod passes through the gear shaft and the meshing transmission of the first engaging teeth of rack form in this application, and the piston rod no longer passes through the pneumatic cylinder promptly, does not have high pressure oil, effectively avoids the problem of hydraulic oil leakage, and then avoids gaseous pollutants's the condition to take place. And multi-stage compression is realized by proportioning different cylinders.
This application movement stroke is longer, and compressor system spare part constitutes still less, compares with current pure mechanical type crank connecting rod formula compressor, and the structure is simpler, and it is more convenient to install, and hydrogen compression efficiency is higher.
Drawings
FIG. 1 is a schematic main cross-sectional view of a single row of hydrogen compression cylinders (both cylinder liners have the same inner diameter);
FIG. 2 is a schematic main cross-sectional view of a single row of hydrogen compression cylinders (two cylinder liners of different inner diameters);
FIG. 3 is a schematic main sectional view of a two-row hydrogen compression cylinder;
FIG. 4 is a schematic main cross-sectional view of a single row of hydraulic cylinder driven hydrogen compression cylinders;
FIG. 5 is a flow diagram of a single row hydrogen compression cylinder stage compression;
FIG. 6 is a two-stage compression flow diagram for a single row of hydrogen compression cylinders;
FIG. 7 is a flow diagram of one-stage compression in a two-row hydrogen compression cylinder;
FIG. 8 is a two-stage compression flow diagram of a two-row hydrogen compression cylinder;
FIG. 9 is a four-stage compression flow diagram of a two-row hydrogen compression cylinder;
FIG. 10 is a hydraulic drive flow diagram of a hydraulic motor driving a single row of hydrogen compression cylinders;
fig. 11 is a hydraulic driving flow chart in which the hydraulic cylinder drives a single row of hydrogen compression cylinders.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 11, and a swing piston type hydrogen compression cylinder includes a first cylinder sleeve 1, a second cylinder sleeve 2, a connecting housing 3 and a gear shaft 4, wherein two ends of the connecting housing 3 are respectively communicated with the first cylinder sleeve 1 and the second cylinder sleeve 2, a first piston 5 is respectively disposed in each cylinder sleeve, the two first pistons 5 are fixedly connected by a first piston rod 6, the first piston rod 6 penetrates through the first cylinder sleeve 1, the connecting housing 3 and the second cylinder sleeve 2, a rack-shaped first engaging tooth 6-1 is processed in the middle of the first piston rod 6 along the axial direction thereof, the gear shaft 4 is mounted in the connecting housing 3 and is controlled to rotate circumferentially by a driving mechanism, the gear shaft 4 is engaged with the first engaging tooth 6-1 on the first piston rod 6 to further control the first piston rod 6 to move reciprocally, every cylinder jacket all is connected through first cylinder seat 8 with connecting between the casing 3, and sealed the setting between first piston rod 6 and the first cylinder seat 8, and the cavity of every first piston 5 both sides is hydrogen chamber and nitrogen gas chamber respectively, and hydrogen exports after two first pistons 5 compress.
The first cylinder liner 1 and the second cylinder liner 2 form a single-row hydrogen compression cylinder.
The first piston rod 6 and the first cylinder seat 8 are arranged in a sealing mode, and the sealing performance in the cylinder is guaranteed.
The middle portion of the first piston rod 6 is formed into a rack shaft-like structure by machining the first engaging teeth 6-1.
The drive mechanism is preferably a hydraulic drive mechanism, such as a hydraulic motor 14 or a hydraulic cylinder 15.
The cylinder base is provided with a through hole for introducing nitrogen into the nitrogen cavity.
In the application, the first piston rod 6 is in meshed transmission with the rack-shaped first meshed teeth 6-1 through the gear shaft 4, namely the piston rod does not pass through the hydraulic cylinder 15 any more, high-pressure oil does not exist, the problem of hydraulic oil leakage is effectively avoided, and further the occurrence of the condition of pollution gas is avoided. And multi-stage compression is realized by proportioning different cylinders.
This application movement stroke is longer, and compressor system spare part constitutes still less, compares with current pure mechanical type crank connecting rod formula compressor, and the structure is simpler, and it is more convenient to install, and hydrogen compression efficiency is higher.
A swing piston type hydrogen compression cylinder also comprises a third cylinder sleeve 9 and a fourth cylinder sleeve 10 which are correspondingly communicated and arranged at two ends of a connecting shell 3, a second piston rod 12 is respectively arranged in the third cylinder sleeve 9 and the fourth cylinder sleeve 10, the two second piston rods 12 are fixedly connected through a second piston rod 12 rod, the second piston rod 12 rod penetrates through the third cylinder sleeve 9, the connecting shell 3 and the fourth cylinder sleeve 10, a first piston rod 6 and a second piston rod 12 rod are respectively arranged at two sides of a gear shaft 4, a rack-shaped third meshing tooth 12-1 is processed in the middle of the second piston rod 12 rod along the axial direction, the two piston rods are controlled to move in a reciprocating manner simultaneously through the meshing of the gear shaft 4 and the first meshing tooth 6-1 as well as the third meshing tooth 12-1, the third cylinder sleeve 9 and the connecting shell 3 as well as the fourth cylinder sleeve 10 and the connecting shell 3 are correspondingly connected through a second cylinder seat 13, and the second piston rod 12 rod and the second cylinder seat 13 are arranged in a sealing way, the cavities at the two sides of each second piston rod 12 are respectively a hydrogen cavity and a nitrogen cavity, and hydrogen is compressed by the two second piston rods 12 and then output. The first cylinder liner 1 to the fourth cylinder liner 10 together form a double row hydrogen compression cylinder. The outer part of each cylinder sleeve is sleeved with a water jacket, and the cylinder sleeves and the cylinder head 16 are correspondingly and fixedly connected through pull rods and locking nuts.
The driving mechanism is a hydraulic motor 14, and the output end of the hydraulic motor 14 is coaxially and fixedly connected with the gear shaft 4. The hydraulic motor 14 is a swing motor. In the working process, hydraulic oil is pumped by the variable displacement pump 23, power is provided for the swing motor by the hydraulic valve 24, and then the swing motor drives the gear shaft 4 to rotate. The hydrogen in the cylinder sleeve is compressed to a certain pressure and then discharged, when the piston reaches the cylinder seat, the travel switch 17 is triggered, and then the direction is changed through the hydraulic direction changing valve 25, and the hydrogen compression process on the other side is carried out. A relief valve 27 and an unloading valve 26 are also provided in the hydraulic drive system. According to different settings of the inner diameter of the cylinder sleeve, one-stage compression, two-stage compression or four-stage compression of hydrogen can be realized.
The driving mechanism can also be a hydraulic cylinder 15, the hydraulic cylinder 15 comprises a hydraulic cylinder sleeve 15-1, cylinder covers 15-2 fixedly arranged at two ends of the hydraulic cylinder sleeve 15-1 and a hydraulic piston shaft 15-3 coaxially arranged in the hydraulic cylinder sleeve 15-1, the middle part of the hydraulic cylinder sleeve 15-1 is communicated with the connecting shell 3, the middle part of the hydraulic piston shaft 15-3 is provided with second toothed meshing teeth 15-31 along the axial direction, the gear shaft 4 is positioned between the first piston rod 6 and the hydraulic piston shaft 15-3 and is meshed with the first meshing teeth 6-1 and the second meshing teeth 15-31 at the same time, hydraulic oil enters the hydraulic cylinder sleeve 15-1 through the two cylinder covers 15-2 to push the hydraulic piston shaft 15-3 to move in a reciprocating mode, and therefore the first piston rod 6 is controlled to move in a reciprocating mode. The hydraulic cylinder 15 is driven in the same manner as the hydraulic motor 14, namely: the hydraulic oil is pumped by the variable displacement pump 23, the hydraulic cylinder 15 is powered by the hydraulic valve 24, and then the hydraulic cylinder 15 drives the gear shaft 4 to rotate. The hydrogen in the cylinder sleeve is compressed to a certain pressure and then discharged, when the piston reaches the cylinder seat, the travel switch 17 is triggered, and then the direction is changed through the hydraulic direction changing valve 25, and the hydrogen compression process on the other side is carried out. A relief valve 27 and an unloading valve 26 are also provided in the hydraulic drive system. According to different settings of the inner diameter of the cylinder sleeve, one-stage compression and two-stage compression of hydrogen can be realized.
Each hydrogen inlet and each compressed hydrogen outlet of the hydrogen compression cylinder are provided with one-way valves to control the inlet or the outlet of hydrogen. Namely, the one-way valve arranged at the hydrogen inlet is an air inlet valve, and the one-way valve arranged at the compressed hydrogen outlet is an air outlet valve.
And a cylinder head 16 is hermetically arranged at one end of each cylinder sleeve far away from the connecting shell 3. The hydrogen inlet and the compressed hydrogen outlet are both provided in the cylinder head 16. Check rings are arranged between the cylinder head 16 and the corresponding cylinder sleeve.
A travel switch 17 is mounted in each cylinder head 16. The reciprocating distance of the piston rod is controlled by a travel switch 17.
The outer part of each piston is coaxially sleeved with a piston ring 18 and a first wear-resistant ring 19 along the axial direction, an O-shaped ring 20 is arranged between each cylinder sleeve and the corresponding cylinder seat, and a rod sealing ring 21 and a second wear-resistant ring 22 are arranged between each piston rod and the cylinder seat along the axial direction.
The second embodiment is as follows: in the present embodiment, a hydrogen compression system using the above-described rocking piston type hydrogen compression cylinder is described with reference to fig. 1 to 11, in which a hydraulic motor 14 is used as a drive mechanism,
when the hydrogen compression cylinder is single-row and the inner diameters of the first cylinder sleeve 1 and the second cylinder sleeve 2 are the same, hydrogen enters the hydrogen cavities at two ends of the first piston rod 6 through the two first check valves 301, is compressed by the two first pistons 5 correspondingly, and is output by the two second check valves 302 correspondingly, so that primary compression of the hydrogen is realized;
when the hydrogen compression cylinder is single-row and the inner diameter of the second cylinder sleeve 2 is smaller than that of the first cylinder sleeve 1, hydrogen enters the hydrogen cavity at one end of the first piston rod 6 through the third one-way valve 303, is subjected to primary compression through the first piston 5 in the first cylinder sleeve 1, sequentially enters the hydrogen cavity at the other end of the first piston rod 6 through the fourth one-way valve 304, the filter 28 and the fifth one-way valve 305, is subjected to secondary compression through the first piston 5 in the second cylinder sleeve 2, and is output through the sixth one-way valve 306, so that the two-stage compression of the hydrogen is realized;
when the hydrogen compression cylinder is double-row and the inner diameters of the cylinder sleeves are the same, hydrogen enters the hydrogen cavities at the two ends of the first piston rod 6 and the two ends of the second piston rod 12 through the four seventh check valves 307 respectively, is compressed by the two first pistons 5 and the two second piston rods 12 correspondingly, and is output by the four eighth check valves 308 correspondingly, so that primary compression of the hydrogen is realized;
when the hydrogen compression cylinders are double rows, the inner diameter of the first cylinder sleeve 1 is smaller than that of the second cylinder sleeve 2, and the inner diameter of the fourth cylinder sleeve 10 is smaller than that of the third cylinder sleeve 9, hydrogen enters a hydrogen cavity at one end of a rod of the second piston rod 12 through the ninth check valve 309, is subjected to primary compression through the second piston rod 12 in the third cylinder sleeve 9, sequentially enters a hydrogen cavity at the other end of the rod of the second piston rod 12 through the tenth check valve 310, the filter 28 and the eleventh check valve 311, is subjected to secondary compression through the second piston rod 12 in the fourth cylinder sleeve 10, and is output through the twelfth check valve 312, so that two-stage compression of one row of hydrogen compression cylinders is realized; hydrogen enters the hydrogen chamber at the other end of the first piston rod 6 through the thirteenth one-way valve 313, after being subjected to primary compression by the first piston 5 in the second cylinder sleeve 2, sequentially enters the hydrogen chamber at one end of the first piston rod 6 through the fourteenth one-way valve 314, the filter 28 and the fifteenth one-way valve 315, is subjected to secondary compression by the first piston 5 in the first cylinder sleeve 1, and is output through the sixteenth one-way valve 316, so that two-stage compression of the other row of hydrogen compression cylinders is realized;
when the hydrogen compression cylinder is double-row, the inner diameter of the first cylinder sleeve 1 is smaller than that of the second cylinder sleeve 2, and the inner diameter of the fourth cylinder sleeve 10 is smaller than that of the third cylinder sleeve 9, hydrogen enters the hydrogen cavity at one end of the rod of the second piston rod 12 through the seventeenth check valve 317, enters the hydrogen cavity at the other end of the rod of the second piston rod 12 through the eighteenth check valve 318, the filter 28 and the nineteenth check valve 319 after being subjected to primary compression by the second piston rod 12 in the third cylinder sleeve 9, enters the hydrogen cavity at the other end of the rod of the first piston rod 6 through the twentieth check valve 320, the filter 28 and the twenty-first check valve 321 after being subjected to secondary compression by the second piston rod 12 in the fourth cylinder sleeve 10, enters the hydrogen cavity at one end of the first piston rod 6 through the twenty-second check valve 322, the filter 28 and the twenty-third check valve 323 after being subjected to tertiary compression by the first piston 5 in the second cylinder sleeve 2, after four-stage compression is performed by the first piston 5 in the first cylinder sleeve 1, the hydrogen is output through the twenty-fourth one-way valve 324, and four-stage compression of the hydrogen is realized. Cooling and impurity removal are performed through the filter 28 for the next stage of compression. Other components and connection relations are the same as those of the first embodiment.
The third concrete implementation mode: in the present embodiment, the hydrogen compression system using the above-mentioned oscillating piston type hydrogen compression cylinder is described with reference to fig. 1 to 11, the hydrogen compression cylinder is single-row and uses the hydraulic cylinder 15 as a driving mechanism, when the inner diameters of the first cylinder liner 1 and the second cylinder liner 2 are the same, hydrogen enters the hydrogen cavities at both ends of the first piston rod 6 through the two first check valves 301, is compressed by the two first pistons 5 correspondingly, and is output by the two second check valves 302 correspondingly, so as to implement primary compression of hydrogen;
when the inner diameter of the second cylinder liner 2 is smaller than the inner diameter of the first cylinder liner 1, hydrogen enters the hydrogen cavity at one end of the first piston rod 6 through the third check valve 303, after being subjected to primary compression by the first piston 5 in the first cylinder liner 1, the hydrogen sequentially enters the hydrogen cavity at the other end of the first piston rod 6 through the fourth check valve 304, the filter 28 and the fifth check valve 305, and after being subjected to secondary compression by the first piston 5 in the second cylinder liner 2, the hydrogen is output through the sixth check valve 306, so that the two-stage compression of the hydrogen is realized. Other components and connection relations are the same as those of the first or second embodiment.

Claims (10)

1. A swing piston type hydrogen compression cylinder is characterized in that: the connecting device comprises a first cylinder sleeve (1), a second cylinder sleeve (2), a connecting shell (3) and a gear shaft (4), wherein two ends of the connecting shell (3) are respectively communicated with the first cylinder sleeve (1) and the second cylinder sleeve (2), each cylinder sleeve is internally provided with a first piston (5), the two first pistons (5) are fixedly connected through a first piston rod (6), the first piston rod (6) penetrates through the first cylinder sleeve (1), the connecting shell (3) and the second cylinder sleeve (2), the middle part of the first piston rod (6) is axially processed with rack-shaped first meshing teeth (6-1), the gear shaft (4) is arranged in the connecting shell (3) and controls the circumferential rotation through a driving mechanism, the gear shaft (4) is meshed with the first meshing teeth (6-1) on the first piston rod (6), and then control first piston rod (6) reciprocating motion, every cylinder jacket all is connected through first cylinder seat (8) with connecting between casing (3), and sealed the setting between first piston rod (6) and first cylinder seat (8), and the cavity of every first piston (5) both sides is hydrogen chamber and nitrogen gas chamber respectively, and hydrogen exports after two first piston (5) compression.
2. A rocking piston type hydrogen compression cylinder as claimed in claim 1, in which: a swing piston type hydrogen compression cylinder further comprises a third cylinder sleeve (9) and a fourth cylinder sleeve (10) which are correspondingly communicated with and arranged at two ends of a connecting shell (3), the third cylinder sleeve (9) and the fourth cylinder sleeve (10) are respectively provided with a second piston rod (12), the two second piston rods (12) are fixedly connected through the second piston rod (12) and the second piston rod (12) penetrates through the third cylinder sleeve (9), the connecting shell (3) and the fourth cylinder sleeve (10), the first piston rod (6) and the second piston rod (12) are respectively arranged at two sides of a gear shaft (4), third engaging teeth (12-1) in a rack shape are processed in the middle of the second piston rod (12) along the axial direction of the second piston rod, and the gear shaft (4) is meshed with the first engaging teeth (6-1) and the third engaging teeth (12-1) to realize the simultaneous control of the reciprocating movement of the two piston rods, the third cylinder sleeve (9) and the connecting shell (3) and the fourth cylinder sleeve (10) and the connecting shell (3) are correspondingly connected through the second cylinder base (13), the second piston rod (12) and the second cylinder base (13) are arranged in a sealing mode, cavities on two sides of each second piston rod (12) are respectively a hydrogen cavity and a nitrogen cavity, and hydrogen is compressed by the two second piston rods (12) and then output.
3. A rocking piston type hydrogen compression cylinder as claimed in claim 1 or 2, in which: the driving mechanism is a hydraulic motor (14), and the output end of the hydraulic motor (14) is coaxially and fixedly connected with the gear shaft (4).
4. A rocking piston type hydrogen compression cylinder as claimed in claim 1, in which: the driving mechanism is a hydraulic cylinder (15), the hydraulic cylinder (15) comprises a hydraulic cylinder sleeve (15-1), cylinder covers (15-2) fixedly mounted at two ends of the hydraulic cylinder sleeve (15-1) and a hydraulic piston shaft (15-3) coaxially arranged in the hydraulic cylinder sleeve (15-1), wherein the middle part of the hydraulic cylinder sleeve (15-1) is communicated with the connecting shell (3), a second toothed meshing tooth (15-31) is machined in the middle part of the hydraulic piston shaft (15-3) along the axial direction of the hydraulic piston shaft, the gear shaft (4) is positioned between the first piston rod (6) and the hydraulic piston shaft (15-3) and is meshed with the first meshing tooth (6-1) and the second meshing tooth (15-31) simultaneously, hydraulic oil enters the hydraulic cylinder sleeve (15-1) through the two cylinder covers (15-2), the hydraulic piston shaft (15-3) is pushed to reciprocate, and the first piston rod (6) is controlled to reciprocate.
5. A rocking piston type hydrogen compression cylinder as claimed in claim 1, 2 or 4, in which: each hydrogen inlet and each compressed hydrogen outlet of the hydrogen compression cylinder are provided with one-way valves to control the inlet or the outlet of hydrogen.
6. A rocking piston type hydrogen compression cylinder as claimed in claim 1, in which: and a cylinder head (16) is respectively and hermetically arranged at one end of each cylinder sleeve far away from the connecting shell (3).
7. A rocking piston type hydrogen compression cylinder as claimed in claim 6, in which: a travel switch (17) is arranged in each cylinder head (16).
8. A rocking piston type hydrogen compression cylinder as claimed in claim 1, in which: the outer portion of each piston is coaxially sleeved with a piston ring (18) and a first wear-resistant ring (19) along the axial direction of the piston, an O-shaped ring (20) is arranged between each cylinder sleeve and the corresponding cylinder seat, and a rod sealing ring (21) and a second wear-resistant ring (22) are arranged between each piston rod and the cylinder seat along the axial direction of the piston rod.
9. A hydrogen compression system using the oscillating piston type hydrogen compression cylinder as claimed in any one of claims 1 to 8, wherein: a hydraulic motor (14) is adopted as a driving mechanism,
when the hydrogen compression cylinder is single-row and the inner diameters of the first cylinder sleeve (1) and the second cylinder sleeve (2) are the same, hydrogen respectively enters hydrogen cavities at two ends of a first piston rod (6) through two first one-way valves (301), is correspondingly compressed by two first pistons (5), and is correspondingly output by two second one-way valves (302), so that primary compression of the hydrogen is realized;
when the hydrogen compression cylinder is single-row and the inner diameter of the second cylinder sleeve (2) is smaller than that of the first cylinder sleeve (1), hydrogen enters a hydrogen chamber at one end of the first piston rod (6) through the third one-way valve (303), is subjected to primary compression through the first piston (5) in the first cylinder sleeve (1), sequentially enters the hydrogen chamber at the other end of the first piston rod (6) through the fourth one-way valve (304), the filter (28) and the fifth one-way valve (305), is subjected to secondary compression through the first piston (5) in the second cylinder sleeve (2), and is output through the sixth one-way valve (306), so that the two-stage compression of the hydrogen is realized;
when the hydrogen compression cylinder is double-row and the inner diameters of the cylinder sleeves are the same, hydrogen enters the hydrogen cavities at the two ends of the first piston rod (6) and the two ends of the second piston rod (12) respectively through the four seventh one-way valves (307), is compressed by the two first pistons (5) and the two second piston rods (12) correspondingly, and is output by the four eighth one-way valves (308) correspondingly, so that the primary compression of the hydrogen is realized;
when the hydrogen compression cylinder is double-row and the inner diameter of the first cylinder sleeve (1) is smaller than that of the second cylinder sleeve (2), and the inner diameter of the fourth cylinder sleeve (10) is smaller than that of the third cylinder sleeve (9), hydrogen enters a hydrogen cavity at one end of a rod of the second piston rod (12) through the ninth one-way valve (309), sequentially enters the hydrogen cavity at the other end of the rod of the second piston rod (12) through the tenth one-way valve (310), the filter (28) and the eleventh one-way valve (311) after being subjected to primary compression by the second piston rod (12) in the third cylinder sleeve (9), and is output through the twelfth one-way valve (312) after being subjected to secondary compression by the second piston rod (12) in the fourth cylinder sleeve (10), so that two-stage compression of one row of hydrogen compression cylinders is realized; hydrogen enters a hydrogen cavity at the other end of the first piston rod (6) through the thirteenth one-way valve (313), is subjected to primary compression through the first piston (5) in the second cylinder sleeve (2), sequentially enters the hydrogen cavity at one end of the first piston rod (6) through the fourteenth one-way valve (314), the filter (28) and the fifteenth one-way valve (315), is subjected to secondary compression through the first piston (5) in the first cylinder sleeve (1), and is output through the sixteenth one-way valve (316), so that two-stage compression of the other row of hydrogen compression cylinders is realized;
when the hydrogen compression cylinder is double-row and the inner diameter of the first cylinder sleeve (1) is smaller than that of the second cylinder sleeve (2) and the inner diameter of the fourth cylinder sleeve (10) is smaller than that of the third cylinder sleeve (9), hydrogen enters the hydrogen chamber at one end of the rod of the second piston rod (12) through the seventeenth one-way valve (317), enters the hydrogen chamber at the other end of the rod of the second piston rod (12) through the eighteenth one-way valve (318), the filter (28) and the nineteenth one-way valve (319) after being subjected to primary compression by the second piston rod (12) in the third cylinder sleeve (9), enters the hydrogen chamber at the other end of the rod of the second piston rod (12) through the eighteenth one-way valve (318), the filter (28) and the nineteenth one-way valve (319) in sequence, enters the hydrogen chamber at the other end of the first piston rod (6) through the twentieth one-way valve (320), the filter (28) and the twenty-first one-way valve (321) after being subjected to tertiary compression by the first piston (5) in the second cylinder sleeve (2), then the hydrogen enters a hydrogen cavity at one end of the first piston rod (6) through a twenty-second one-way valve (322), a filter (28) and a twenty-third one-way valve (323) in sequence, is subjected to four-stage compression through a first piston (5) in the first cylinder sleeve (1), and is output through a twenty-fourth one-way valve (324), so that the four-stage compression of the hydrogen is realized.
10. A hydrogen compression system using the oscillating piston type hydrogen compression cylinder as claimed in any one of claims 1 to 8, wherein: the hydrogen compression cylinder is single-row and adopts a hydraulic cylinder (15) as a driving mechanism, when the inner diameters of the first cylinder sleeve (1) and the second cylinder sleeve (2) are the same, hydrogen enters hydrogen cavities at two ends of a first piston rod (6) through two first one-way valves (301), is compressed by two first pistons (5) correspondingly and then is output by two second one-way valves (302) correspondingly, and primary compression of the hydrogen is realized;
when the inner diameter of the second cylinder sleeve (2) is smaller than the inner diameter of the first cylinder sleeve (1), hydrogen enters a hydrogen chamber at one end of the first piston rod (6) through the third one-way valve (303), enters the hydrogen chamber at the other end of the first piston rod (6) through the fourth one-way valve (304), the filter (28) and the fifth one-way valve (305) in sequence after being subjected to primary compression through the first piston (5) in the first cylinder sleeve (1), and is output through the sixth one-way valve (306) after being subjected to secondary compression through the first piston (5) in the second cylinder sleeve (2), so that the two-stage compression of the hydrogen is realized.
CN202111040628.0A 2021-09-06 2021-09-06 Swing piston type hydrogen compression cylinder and hydrogen compression system Pending CN113898553A (en)

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CA1189387A (en) * 1982-01-08 1985-06-25 Canadian Drilling Equipment Ltd. Mud pump drive
CN2606199Y (en) * 2003-03-09 2004-03-10 罗民权 Compressor
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CN102080641A (en) * 2011-01-28 2011-06-01 同济大学 Reciprocating double-plunger pump oil supply device
CN104912660A (en) * 2015-04-17 2015-09-16 华侨大学 Two-cylinder four-stroke hydraulic free piston engine based on electric control compression stroke
CN108591008A (en) * 2018-07-06 2018-09-28 北京普发动力控股股份有限公司 Hydrogenation stations hydraulic piston type hydrogen gas compressor
CN108799051A (en) * 2018-06-11 2018-11-13 焦作市华中能源科技有限公司 A kind of high efficient, high pressure servo fluid pump and its application method
CN113167260A (en) * 2019-01-31 2021-07-23 世赞能源株式会社 Hydrogen compression device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1189387A (en) * 1982-01-08 1985-06-25 Canadian Drilling Equipment Ltd. Mud pump drive
US20050042111A1 (en) * 2003-02-05 2005-02-24 Zaiser Lenoir E. Fluid pump
CN2606199Y (en) * 2003-03-09 2004-03-10 罗民权 Compressor
CN201258955Y (en) * 2008-09-26 2009-06-17 长沙科达建设机械制造有限公司 Hydraulic power rack-and-pinion drive
CN101476553A (en) * 2009-01-19 2009-07-08 西南石油大学 Rack-and-pinion coupled hydraulic multi-cylinder reciprocating pump
CN102080641A (en) * 2011-01-28 2011-06-01 同济大学 Reciprocating double-plunger pump oil supply device
CN104912660A (en) * 2015-04-17 2015-09-16 华侨大学 Two-cylinder four-stroke hydraulic free piston engine based on electric control compression stroke
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CN113167260A (en) * 2019-01-31 2021-07-23 世赞能源株式会社 Hydrogen compression device

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Application publication date: 20220107