CN108799051A - A kind of high efficient, high pressure servo fluid pump and its application method - Google Patents
A kind of high efficient, high pressure servo fluid pump and its application method Download PDFInfo
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- CN108799051A CN108799051A CN201810593555.XA CN201810593555A CN108799051A CN 108799051 A CN108799051 A CN 108799051A CN 201810593555 A CN201810593555 A CN 201810593555A CN 108799051 A CN108799051 A CN 108799051A
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- high pressure
- fluid pump
- rack
- seal chamber
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- 239000012530 fluid Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses a kind of high efficient, high pressure servo fluid pump and its application methods；The servopump includes two seal cases, it is equipped with compression mechanism in two seal cases, it is respectively arranged with first annular seal space between the inside both sides and compression mechanism of the upside seal case, third seal chamber, it is respectively arranged with the second seal chamber between the inside both sides and compression mechanism of the downside seal case, 4th seal chamber, the first annular seal space, 4th seal chamber and the second seal chamber, third seal chamber passes through the upper side port of connecting tube and four-way pipe, left side port is connected, the lower side port of two four-way pipes is connected with low-pressure admission nozzle.The present invention drives the torque of rack-and-pinion cylinder rotation bigger by servo motor, also bigger to the extruding force of gas, can obtain relatively high gas pressure, and it is many convenient that the density to reduce oil is brought with oil exploitation.
Description
Technical field
The present invention relates to field mining equipment technical field more particularly to a kind of high efficient, high pressure servo fluid pump and its use
Method.
Background technology
Currently, the gas lift method that oil field uses recovers the oil, by the high pressure gas injected into well from ground and oil reservoir output liquid stream
Body mixes in the wellbore, so that the mixed liquor density in pit shaft is reduced using the expansion of gas, to enumerate downhole well fluid, adopts
It is recovered the oil with gas lift method, most important component is air pump inside device, air pump compressible gas, and can will by pit shaft
Compressed gas is injected in oil reservoir, to make the density of oil reduce, the exploitation for oil of being more convenient for.
Through retrieval, Chinese patent grant number CN205876673U discloses a kind of small displacement servo motor latent oil diaphragm pump,
Including sequentially connected diaphragm pump from top to bottom, transmission mechanism, latent oil servo motor；The diaphragm pump includes cylinder sleeve, in cylinder sleeve
It is movably set with piston, diaphragm is movably set with above piston, liquid feed valve and tapping valve are provided with above diaphragm；The biography
Motivation structure includes connecting rod, bent axle, drive shaft, and the lower end of the piston of the diaphragm pump connects connecting rod by the pin being laterally arranged
The lower end of upper end, connecting rod connects bent axle, and bent axle connects drive shaft by bevel gear transmission；The lower end of drive shaft connects latent oil
The motor shaft of servo motor.
It is currently used for the shortcoming of the air pump of oil exploitation：Its torque is smaller when motor rotates, to the compressing force of air
It is limited, higher air pressure can not be obtained and mixed with oil reservoir, to which the density of oil can not be reduced, for oil exploitation bring compared with
More worries.
Invention content
The purpose of the present invention is to provide a kind of high efficient, high pressure servo fluid pump and its application methods, pass through servo motor band
The torque of moving gear rack cylinder rotation is bigger, also bigger to the extruding force of gas, can obtain relatively high gas pressure
The advantages of, solve be currently used for oil exploitation air pump torque it is smaller, it is limited to the compressing force of air, can not obtain higher
Air pressure is mixed with oil reservoir, thus the problem of can not reducing the density of oil.
A kind of high efficient, high pressure servo fluid pump according to the ... of the embodiment of the present invention, including two seal cases, two described close
Compression mechanism is equipped in joint sealing body, it is close to be respectively arranged with first between the inside both sides and compression mechanism of the upside seal case
Chamber, third seal chamber are sealed, the second seal chamber, the are respectively arranged between the inside both sides and compression mechanism of the downside seal case
Four seal chambers, the first annular seal space, the 4th seal chamber and the second seal chamber, third seal chamber pass through connecting tube and four-way pipe
Upper side port, left side port be connected, the lower side port of two four-way pipes is connected with low-pressure admission nozzle, two
The right side port of the four-way pipe is connected with high pressure outlet air nozzle.
Further, the compression mechanism includes two oil cylinder pistons, and two oil cylinder pistons are separately positioned on sealing
Inside both sides of the babinet and outer wall edge of oil cylinder piston offsets with cabinet wall.
Further, it is connected by connecting rod between two oil cylinder pistons, the company inside the seal case of upside
Extension bar outer wall is equipped with upper rack, and the connecting rod outer wall inside the seal case of downside is equipped with lower rack, the upper rack
It is connected by transmission mechanism between lower rack.
Further, the transmission mechanism includes gear shaft, and the outer wall of the gear shaft is equipped with and upper rack, lower rack
The gear teeth being meshed.
Further, the middle part of the gear shaft is equipped with shaft, and one end of the shaft and shaft coupling are coaxially connected, described
One end of shaft coupling is connected with servo motor.
Further, check valve, the setting direction of two check valves are equipped on two low-pressure admission nozzles
It is interior stream.
Further, check valve, the setting side of two check valves are also equipped on two high pressure outlet air nozzles
To be outflow.
A kind of application method of high efficient, high pressure servo fluid pump, specifically used steps are as follows：
S1:Servopump is fixed on pit shaft, servo motor passes through the gear axis connection of shaft coupling and double-rack-and-pinion, gear shaft
Respectively one toothed rack of engagement, one oil cylinder piston of every each connection in toothed rack both ends are for linear motion up and down；
S2:Servo motor band movable gear shaft is swung clockwise or counterclockwise, and gear shaft swings what drive was engaged with
Upper rack, lower rack make straight reciprocating motion, to which the volume for driving oil cylinder piston to make chamber closed at both ends is expanded or shunk, if tooth
Rotationally clockwise, the upper rack being engaged with is for linear motion to the right for wheel shaft, and lower rack is for linear motion to the left, and first is close
Chamber, the 4th seal chamber are sealed from low-pressure admission nozzle air-breathing, the second seal chamber, third seal chamber extrude gas；Conversely, gear shaft is inverse
Clockwise rotates, and the second seal chamber, third seal chamber are from low-pressure admission nozzle air-breathing, first annular seal space, the 4th seal chamber pressure
Go out gas, move in circles in this way, low-pressure gas is continuously drawn into and is extruded；Using the compressibility principle of gas, constantly
Sucking low-pressure gas is extruded, volume compression, pressure rise then by the rotation of servo motor by small drift diameter pipeline；
S3:Raised air pressure is discharged by high pressure outlet air nozzle and pit shaft in oil field, makes the reduction of mixed liquor density, consequently facilitating opening
It adopts.
The present invention has an advantageous effect in that compared with prior art：
1, servo motor drives the torque of rack-and-pinion cylinder rotation bigger, also bigger to the extruding force of gas, can obtain
Relatively high gas pressure；
2, due to the structural principle of double-rack-and-pinion so that no matter motor is rotated to which direction, always there is two chamber air-breathings, two chamber pressures
Gas is impulse stroke, is a kind of successional working condition, changes the feelings that original conventional air pumps interruption carries out gas boost
Condition；
3, servo motor can facilitate change rotating speed, can improve working frequency, so changeable unit interval air demand, in turn
Greatly improve working efficiency；
4, by adjusting servo motor rotating speed, different pressure and flowrate proportioning can be easily obtained, to meet in oil field
Exploit the application requirement of mesohigh gas；
5, simple in structure, part is few, sealed reliable, safeguard it is more convenient, it is at low cost, traditional for reciprocal one week of crank type one only work
The work(of circular diameter length, gear double rack work done length in one week is 2 × 3.14 times of diameters, is 6.28 times of crank type, and
And power output and diameter remain 90 ° in one week and torsional forces angle is zero degree, are all with maximum power output.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of structure principle chart of high efficient, high pressure servo fluid pump proposed by the present invention.
In figure：Rack, 6- check valves, 7- four-ways under 1- oil cylinder pistons, 2- upper racks, 3- gear shafts, 4- shaft couplings, 5-
Pipe, 8- low-pressure admissions nozzle, 9- high pressure outlet airs nozzle, a1- first annular seal spaces, the second seal chambers of a2-, b1- thirds seal chamber,
The 4th seal chambers of b2-.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig.1, a kind of high efficient, high pressure servo fluid pumps, including two seal cases, is equipped in two seal cases
Compression mechanism is respectively arranged with first annular seal space a1, third seal chamber between the inside both sides of upside seal case and compression mechanism
B1 is respectively arranged with the second seal chamber b2, the 4th seal chamber b2 between the inside both sides of lower side seals babinet and compression mechanism, the
One seal chamber a1, the 4th seal chamber b2 and the second seal chamber b1, third seal chamber a2 pass through connecting tube and four-way pipe 7
Upper side port, left side port are connected, and the lower side port of two four-way pipes 7 is connected with low-pressure admission nozzle 8, two four-ways
The right side port of pipe 7 is connected with high pressure outlet air nozzle 9.
Compression mechanism include two oil cylinder pistons 1, two oil cylinder pistons 1 be separately positioned on the inside both sides of seal case and
The outer wall edge of oil cylinder piston 1 offsets with cabinet wall；It is connected by connecting rod between two oil cylinder pistons 1, upper side seal
The connecting rod outer wall of box house is equipped with upper rack 2, and the connecting rod outer wall of lower side seals box house is equipped with lower rack 5,
It is connected by transmission mechanism between upper rack 2 and lower rack 5；Transmission mechanism includes gear shaft 3, and the outer wall of gear shaft 3 is equipped with
The gear teeth being meshed with upper rack 2, lower rack 5；The middle part of gear shaft 3 is equipped with shaft, and one end and the shaft coupling 4 of shaft coaxially connect
It connects, one end of shaft coupling 4 is connected with servo motor, and servo motor provides function and operated for servopump；Two low-pressure admission nozzles 8
On be equipped with check valve 6, the setting direction of two check valves 6 is interior stream；It is also equipped on two high pressure outlet air nozzles 9 unidirectional
The setting direction of valve 6, two check valves 6 is outflow.
A kind of application method of high efficient, high pressure servo fluid pump, specifically used steps are as follows：
S1:Servopump is fixed on pit shaft, servo motor is connect by shaft coupling 4 with the gear shaft 3 of double-rack-and-pinion, gear
Respectively one toothed rack of engagement, one oil cylinder piston 1 of every each connection in toothed rack both ends are for linear motion for about 3 axis；
S2:Servo motor band movable gear shaft 3 is swung clockwise or counterclockwise, and the swing drive of gear shaft 3 is engaged with
Upper rack 2, lower rack 5 make straight reciprocating motion, to drive oil cylinder piston 1 make chamber closed at both ends volume expand or contracting
Small, if gear shaft 3 is rotationally clockwise, the upper rack 2 being engaged with is for linear motion to the right, and lower rack 5 makees straight line to the left
Movement, first annular seal space a1, the 4th seal chamber b2 are from 8 air-breathing of low-pressure admission nozzle, the second seal chamber a2, third seal chamber
B1 extrudes gas；Conversely, gear shaft 3 rotates in an anti-clockwise direction, the second seal chamber a2, third seal chamber b1 are from low-pressure inlet pipe
8 air-breathings of mouth, first annular seal space a1, the 4th seal chamber b2 extrude gas, move in circles in this way, low-pressure gas is continuously drawn into
With extrusion；Using the compressibility principle of gas, it is continuously drawn into low-pressure gas, then by the rotation of servo motor, is passed through
Small drift diameter pipeline extrudes, volume compression, pressure rise；
S3:Raised air pressure is discharged by high pressure outlet air nozzle and pit shaft in oil field, makes the reduction of mixed liquor density, consequently facilitating opening
It adopts；The present apparatus is simple in structure simultaneously, part is few, sealed reliable, safeguard it is more convenient, it is at low cost, traditional for crank type one it is reciprocal
The one week work(for only making circular diameter length, gear double rack work done length in one week is 2 × 3.14 times of diameters, is crank type
6.28 times, and power output and diameter remain 90 ° in one week and torsional forces angle is zero degree, are all with maximum power
Output.
Place is not described in detail by the present invention, is the known technology of those skilled in the art.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of high efficient, high pressure servo fluid pump, it is characterised in that：It is equal in two seal cases including two seal cases
Equipped with compression mechanism, first annular seal space is respectively arranged between the inside both sides and compression mechanism of the upside seal case（a1）,
Third seal chamber（b1）, the second seal chamber is respectively arranged between the inside both sides and compression mechanism of the downside seal case
（a2）, the 4th seal chamber（b2）, the first annular seal space（a1）, the 4th seal chamber（b2）With the second seal chamber（a2）, third it is close
Seal chamber（b1）Pass through connecting tube and four-way pipe（7）Upper side port, left side port be connected, two four-way pipes（7）'s
Lower side port with low-pressure admission nozzle（8）It is connected, two four-way pipes（7）Right side port with high pressure outlet air nozzle
（9）It is connected.
2. a kind of high efficient, high pressure servo fluid pump according to claim 1, it is characterised in that：The compression mechanism includes two
A oil cylinder piston（1）, two oil cylinder pistons（1）It is separately positioned on the inside both sides of seal case and oil cylinder piston（a1）'s
Outer wall edge offsets with cabinet wall.
3. a kind of high efficient, high pressure servo fluid pump according to claim 2, it is characterised in that：Two oil cylinder pistons
（a1）Between be connected by connecting rod, the connecting rod outer wall inside the seal case of upside be equipped with upper rack（2）, downside institute
It states the connecting rod outer wall inside seal case and is equipped with lower rack（5）, the upper rack（2）With lower rack（5）Between pass through transmission
Mechanism is connected.
4. a kind of high efficient, high pressure servo fluid pump according to claim 3, it is characterised in that：The transmission mechanism includes tooth
Wheel shaft（3）, the gear shaft（3）Outer wall be equipped with and upper rack（2）, lower rack（5）The gear teeth being meshed.
5. a kind of high efficient, high pressure servo fluid pump according to claim 4, it is characterised in that：The gear shaft（3）In
Portion is equipped with shaft, one end of the shaft and shaft coupling（4）It is coaxially connected, the shaft coupling（4）One end be connected with servo electricity
Machine.
6. a kind of high efficient, high pressure servo fluid pump according to claim 1, it is characterised in that：Two low-pressure inlet pipes
Mouthful（8）On be equipped with check valve（6）, two check valves（6）Setting direction be interior stream.
7. a kind of high efficient, high pressure servo fluid pump according to claim 6, it is characterised in that：Two high pressure outlet air pipes
Mouthful（9）On be also equipped with check valve（6）, two check valves（6）Setting direction be outflow.
8. according to a kind of application method of high efficient, high pressure servo fluid pump of claim 1-7 any one of them, which is characterized in that
It is specifically used that steps are as follows：
S1:Servopump is fixed on pit shaft, servo motor passes through shaft coupling（4）With the gear shaft of double-rack-and-pinion（3）Connection,
Gear shaft（3）Respectively one toothed rack of engagement, every toothed rack both ends respectively connect an oil cylinder piston up and down（1）It is for linear motion；
S2:Servo motor band movable gear shaft（3）It swings clockwise or counterclockwise, gear shaft（3）Swing drive therewith
The upper rack of engagement（2）, lower rack（5）Make straight reciprocating motion, to drive oil cylinder piston（1）Make the volume of chamber closed at both ends
It expands or shrinks, using the compressibility principle of gas, is continuously drawn into low-pressure gas, then by the rotation of servo motor,
It is extruded by small drift diameter pipeline, volume compression, pressure rise；
S3:Raised air pressure is discharged by high pressure outlet air nozzle and pit shaft in oil field, makes the reduction of mixed liquor density, consequently facilitating opening
It adopts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810593555.XA CN108799051A (en) | 2018-06-11 | 2018-06-11 | A kind of high efficient, high pressure servo fluid pump and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810593555.XA CN108799051A (en) | 2018-06-11 | 2018-06-11 | A kind of high efficient, high pressure servo fluid pump and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108799051A true CN108799051A (en) | 2018-11-13 |
Family
ID=64088196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810593555.XA Pending CN108799051A (en) | 2018-06-11 | 2018-06-11 | A kind of high efficient, high pressure servo fluid pump and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108799051A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814652A (en) * | 2021-01-13 | 2021-05-18 | 江苏联友科研仪器有限公司 | Visual model cauldron for ultralow gas permeability |
| CN113898553A (en) * | 2021-09-06 | 2022-01-07 | 哈尔滨普发新能源装备科技有限公司 | Swing piston type hydrogen compression cylinder and hydrogen compression system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1489092A (en) * | 1974-12-02 | 1977-10-19 | Energiagazdalkodasi Intezet | Reciprocating engines |
| CN201176890Y (en) * | 2008-04-07 | 2009-01-07 | 扬州大学 | Kinetic pressure guiding rail supporting type gear-teeth bar engine |
| CN102155377A (en) * | 2011-05-10 | 2011-08-17 | 合肥华宇橡塑设备有限公司 | Mechanical and electrical piston directly-driven reciprocating pump |
| CN201963401U (en) * | 2011-02-01 | 2011-09-07 | 梁振勇 | Drive mechanism of efficient internal combustion engine |
| CN204591821U (en) * | 2015-04-17 | 2015-08-26 | 华侨大学 | A kind of gear follow-up-type two cylinder four-stroke hydraulic free-piston engine |
| CN208900305U (en) * | 2018-06-11 | 2019-05-24 | 焦作市华中能源科技有限公司 | A kind of high efficient, high pressure servo fluid pump |
-
2018
- 2018-06-11 CN CN201810593555.XA patent/CN108799051A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1489092A (en) * | 1974-12-02 | 1977-10-19 | Energiagazdalkodasi Intezet | Reciprocating engines |
| CN201176890Y (en) * | 2008-04-07 | 2009-01-07 | 扬州大学 | Kinetic pressure guiding rail supporting type gear-teeth bar engine |
| CN201963401U (en) * | 2011-02-01 | 2011-09-07 | 梁振勇 | Drive mechanism of efficient internal combustion engine |
| CN102155377A (en) * | 2011-05-10 | 2011-08-17 | 合肥华宇橡塑设备有限公司 | Mechanical and electrical piston directly-driven reciprocating pump |
| CN204591821U (en) * | 2015-04-17 | 2015-08-26 | 华侨大学 | A kind of gear follow-up-type two cylinder four-stroke hydraulic free-piston engine |
| CN208900305U (en) * | 2018-06-11 | 2019-05-24 | 焦作市华中能源科技有限公司 | A kind of high efficient, high pressure servo fluid pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814652A (en) * | 2021-01-13 | 2021-05-18 | 江苏联友科研仪器有限公司 | Visual model cauldron for ultralow gas permeability |
| CN113898553A (en) * | 2021-09-06 | 2022-01-07 | 哈尔滨普发新能源装备科技有限公司 | Swing piston type hydrogen compression cylinder and hydrogen compression system |
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Application publication date: 20181113 |
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