WO2017048015A1 - Pompe à piston rotatif - Google Patents

Pompe à piston rotatif Download PDF

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Publication number
WO2017048015A1
WO2017048015A1 PCT/KR2016/010262 KR2016010262W WO2017048015A1 WO 2017048015 A1 WO2017048015 A1 WO 2017048015A1 KR 2016010262 W KR2016010262 W KR 2016010262W WO 2017048015 A1 WO2017048015 A1 WO 2017048015A1
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WO
WIPO (PCT)
Prior art keywords
check valve
rotor
volume change
change space
discharge check
Prior art date
Application number
PCT/KR2016/010262
Other languages
English (en)
Korean (ko)
Inventor
고용권
권장순
박정균
지성훈
류지훈
박경우
정수림
김병우
Original Assignee
한국원자력연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국원자력연구원 filed Critical 한국원자력연구원
Priority to MYPI2018701000A priority Critical patent/MY187386A/en
Publication of WO2017048015A1 publication Critical patent/WO2017048015A1/fr

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

Definitions

  • the present invention relates to a rotary piston pump for collecting ground water located at a specific depth of a borehole.
  • an underwater pump is mainly used to pump groundwater present in a specific depth of a borehole.
  • Submersible pump is applied to the pumping method by centrifugal force generated by rotating the impeller to add rotational force to the water.
  • the submersible pump can pump groundwater to a depth deeper than the ground pump, but as the depth of extraction increases, the capacity and size of the submersible pump must increase, so the capacity and size of the submersible pump are limited to the size of the borehole and thus the submersible pump Increasing the dose and depth of harvesting were practically difficult limitations.
  • the present applicant is inserted into the borehole of the Korean Patent No. 1124075, the groundwater collecting device for collecting ground water, the shell forming a portion of the intake pipe;
  • a plurality of intake holes are formed in the separator for dividing the inside of the ground water, and are provided to be movable upward and downward in the shell to move the ground water in the borehole into the intake pipe as the up and down movements occur;
  • a driving unit provided with an electromagnet at each of the upper and lower portions of the operating unit to vertically move the operating unit;
  • an opening and closing unit provided inside the operation unit and including a blade hinged to the separator so as to open and close the water intake hole according to the vertical movement of the operation unit.
  • the prior art is a kind of reciprocating pump that pumps groundwater by generating pressure while the operation unit moves up and down, and has a problem in that the depth of the borehole (suction head) capable of raising groundwater is limited.
  • an object of the present invention is to maximize the depth of the borehole (suction head) that can raise groundwater, and to provide a rotary piston pump that can maximize the amount of groundwater harvesting It is to provide.
  • the rotary piston pump 1000 includes a rotor housing 100 each having a receiving portion 110 formed therein; First inlet check valves 210 and second inlet check valves 230 installed on the lower surfaces of the rotor housing 100 and opened only at a negative pressure; A first discharge check valve 220 and a second discharge check valve 240 respectively installed on the upper surface of the rotor housing 100 and opened only at a positive pressure and communicating with the ground connection pipe 50; A rotor (300) installed in the accommodating part (110) to partition the accommodating part (110) into a plurality of volume variation spaces; And a motor 400 including a drive shaft 410 that is eccentrically coupled to the rotor 300, wherein a portion of the plurality of volumetric variable spaces is expanded by the rotation of the rotor 300 and the other portion is When the volume change space is expanded, the first inflow check valve 210 or the second inflow check valve 230 in communication with the expanded volume change space is opened and the volume change is expanded.
  • the groundwater of the borehole flows into the accommodating part 110, and when the volume change space is compressed,
  • the first inlet check valve 210 or the second inlet check valve 230 in communication with the compressed volume change space is in a closed state, and the first discharge check valve 220 in communication with the compressed volume change space.
  • the second discharge check valve 240 is an open phase Is a characterized in that the ground water in the storage unit 110 is discharged to the ground connector (50).
  • the rotary piston pump 1000 is installed on the upper side of the rotor housing 100, the motor housing 500 is formed therein the machine room part 510 is accommodated therein;
  • the lower portion of the machine chamber 510 communicates with the first discharge check valve 220 and the second discharge check valve 240, and the upper portion of the machine chamber 510 communicates with the ground connection pipe 50. It is characterized by.
  • the rotor housing 100 is the first inlet check valve 210 and the second inlet check valve 230 is formed in a left and right direction arranged on the lower surface and the first discharge check valve 220 and the second discharge check.
  • the valve 240 is characterized in that formed in the front and rear direction arranged on the upper surface.
  • the rotary piston pump 1000 is a rotor seal 610 which is installed on the outer surface of the rotor 300 in contact with the inner surface of the rotor housing 100; And an elastic member 620 installed between an inner surface of the rotor seal 610 and an inner surface of the rotor 300.
  • the rotor 300 and the rotor housing 100 is characterized in that a plurality of connections in the vertical direction.
  • a plurality of volume change spaces are expanded or compressed by the rotation of the rotor so that the first inlet check valve and the second inlet check valve open the groundwater in which the boreholes are introduced into the storage unit.
  • the first discharge check valve and the second discharge check valve are in a closed state or an open state for discharging the groundwater located in the receiving portion to the ground connection pipe, thereby discharging the groundwater introduced into the rotor housing to the ground.
  • the volumetric variable space expands and compresses repeatedly, and the suction and discharge of groundwater are repeated. This has the advantage of having a high suction force and generating a high pressure.
  • groundwater large volume of groundwater can be pumped because the volumetric fluctuations in the rotor housing occur simultaneously in three compartments. That is, the ground water may be sucked from the ground, and the groundwater may be pumped at a deep depth requiring high pressure, and the groundwater may be maximized.
  • FIG. 1 is a perspective view of a rotary piston pump according to the present invention
  • FIG. 2 is a cross-sectional view of a rotary piston pump according to the present invention
  • FIG. 3 is an exploded perspective view of a rotary piston pump according to the present invention.
  • FIG. 4 is a conceptual diagram showing the driving principle of a rotary piston pump according to the present invention
  • FIG. 5 is a perspective view of a rotor according to the present invention.
  • FIG. 1 is a perspective view of a rotary piston pump according to the present invention
  • Figure 2 is a sectional view of a rotary piston pump according to the present invention
  • Figure 3 is an exploded perspective view of a rotary piston pump according to the present invention.
  • the rotary piston pump 1000 is the rotor housing 100, the first inlet check valve 210, the second inlet check valve 230, the first discharge check And a valve 220, a second discharge check valve 240, a rotor 300, and a motor 400.
  • the rotor housing 100 is disposed at a specific depth of the borehole, is formed in a cylindrical structure, and an accommodating part 110 is formed therein.
  • the accommodating part 110 is formed in an epitrochoid curved structure in the interior (center) of the rotor housing 100.
  • the first inlet check valve 210 and the second inlet check valve 230 are respectively installed on the lower surface of the rotor housing 100 and serve to introduce the groundwater located in the borehole into the accommodating part 110 and underpressure. It is in the open state only at the time of closing and in the closed state at constant pressure.
  • the first discharge check valve 220 and the second discharge check valve 240 are respectively installed on the upper surface of the rotor housing 100 to communicate with the ground connecting pipe 50 and the ground water located in the receiving unit 110. It serves to discharge the above ground pipe and is opened only at positive pressure and is closed at negative pressure.
  • the rotor 300 is installed in the accommodating part 110 and divides the accommodating part 110 into a plurality of volume varying spaces, and part of the plurality of volume changing spaces is expanded by the rotation of the rotor 300.
  • the remaining part is compressed, and when the volume change space is expanded, the first inflow check valve 210 or the second inflow check valve 230 in communication with the volume change space to be expanded is opened and is expanded.
  • the first discharge check valve 220 or the second discharge check valve 240 in communication with the volumetric fluctuation space is in a closed state so that the groundwater of the borehole flows into the accommodating part 110, and the volumetric fluctuation space is compressed.
  • first inflow check valve 210 or the second inflow check valve 230 in communication with the volume change space to be compressed is in a closed state, and the first discharge check in communication with the volume change space to be compressed.
  • Valve 220 or the second discharge check valve ( 240 is in an open state and the groundwater of the accommodating part 110 is discharged to the ground connection pipe 50.
  • the motor 400 includes a drive shaft 410 coupled eccentrically with the rotor 300, and serves to rotate the rotor 300.
  • the drive shaft 410 is rotated eccentrically and friction with the rotor 300 is generated, in order to reduce the friction may be coupled to the bearing between the drive shaft 410 and the rotor 300, the drive shaft 410 ) And the rotor 300 may be geared to each other.
  • FIG. 4 is a conceptual diagram showing a driving principle of a rotary piston pump according to the present invention. 4, the first inlet check valve 210, the second inlet check valve 230, the first discharge check valve 220, and the second discharge check valve 240 are described in more detail. It is shown around the rotor housing 100, the three volumetric variable space partitioned by the rotor 300 in the housing 110, respectively, the first volumetric variable space (A), the second volumetric variable space (B) ) And the third volumetric fluctuation space (C).
  • the motor 400 rotates the rotor 300.
  • the first volume change space (A) is in communication with the first inlet check valve 210 and the first discharge check valve 220
  • the second volume change space (B) is the second inlet check valve In communication with 230
  • the third volume change space C is in communication with the second discharge check valve 240.
  • the rotor 300 is rotated by a predetermined angle to compress the first volume change space A and the third volume change space C, and the second volume change space B is expanded.
  • the first volume change space (A) is in communication with the first inlet check valve 210 and the first discharge check valve 220
  • the second volume change space (B) is the second inlet check In communication with the valve 230
  • the third volume change space (C) is in communication with the second discharge check valve (240).
  • the first inflow check valve 210 is closed, and the first discharge check valve 220 is opened to open the first volume.
  • the fluid located in the variable space A is discharged to the outside of the first volume variable space A (or the ground connecting pipe 50) through the first discharge check valve 220.
  • the second inflow check valve 230 is opened to allow the groundwater located in the borehole through the second inflow check valve 230. 2 flows into the volumetric fluctuation space (B).
  • the second discharge check valve 240 is opened to allow the fluid located in the third volume change space C to be discharged. Through the valve 240 is discharged to the outside (or the ground connecting pipe 50) of the third volume change space (C).
  • the rotor 300 is rotated by a predetermined angle so that the first volume change space A is further compressed and the second volume change space B and the third volume change space C are expanded.
  • the first volume change space (A) is in communication with the first discharge check valve 220
  • the second volume change space (B) is the second inlet check valve 230 and the second discharge check valve
  • the third volume change space C is in communication with the first inlet check valve 210.
  • the first volume change space (A) is further compressed, so that the first discharge check valve (220) is kept open and the fluid located in the first volume change space (A) is the first.
  • the discharge check valve 220 is continuously discharged to the outside (or the ground connecting pipe 50) of the first volume change space (A).
  • the second inflow check valve 230 is opened to the groundwater located in the borehole the second inflow check valve 230 Through the continuous flow into the second volume change space (B), the second discharge check valve 240 is in a closed state.
  • the first inflow check valve 210 is opened so that the groundwater located in the borehole is located through the first inflow check valve 210. It flows into the three volumetric fluctuation space (C).
  • the rotor 300 is rotated by a predetermined angle so that the first volume change space A is further compressed, the second volume change space B is compressed, and the third volume change space C is further expanded.
  • the first volume change space (A) is in communication with the first discharge check valve 220
  • the second volume change space (B) is the second inlet check valve 230 and the second discharge check valve In communication with 240
  • the third volume change space C is in communication with the first inlet check valve 210.
  • the first discharge check valve 220 As the first volume change space A is further compressed, the first discharge check valve 220 is kept open, and the groundwater located in the first volume change space A is stored in the first volume change space A. The first discharge check valve 220 is continuously discharged to the outside (or the ground connecting pipe 50) of the first volume change space (A).
  • the rotor 300 is rotated by a predetermined angle so that the first volume change space A is expanded, the second volume change space B is further compressed, and the third volume change space C is further expanded. do.
  • the first volume change space (A) is in communication with the second inlet check valve 230
  • the second volume change space (B) is in communication with the second discharge check valve 240
  • the first The three volumetric fluctuation space C is in communication with the first inlet check valve 210 and the first discharge check valve 220.
  • the second inflow check valve 230 As the first volume change space A is expanded, the second inflow check valve 230 is opened to allow groundwater located in the borehole through the second inflow check valve 230. It flows into 1 volume fluctuation space (A).
  • the second discharge check valve 240 is opened so that the groundwater which is located in the second volume change space B is discharged. Through the check valve 240 is discharged to the outside (or the ground connecting pipe 50) of the first volume change space (A).
  • the ground water which is located in the borehole while maintaining the open state of the first inlet check valve 210, is formed through the first inlet check valve 210.
  • the first discharge check valve 220 is in a closed state.
  • the first volume change space (A), the second volume change space (B), and the third volume change space (C) are expanded and compressed by the rotation of the rotor (300). Inflow and outflow may be repeated.
  • a part of the plurality of volume change spaces is expanded and the other portion is compressed by the rotation of the rotor 300, and when the volume change space is expanded, the volume is expanded.
  • the first inlet check valve 210 or the second inlet check valve 230 is in an open state and communicates with the volumetric fluctuation space to be expanded, the first discharge check valve 220 is in communication with the volume change space is Alternatively, the second discharge check valve 240 is in a closed state so that the groundwater of the borehole flows into the accommodating part 110, and when the volume change space is compressed, the first flow rate communicates with the volume change space that is compressed.
  • the check valve 210 or the second inflow check valve 230 is in a closed state, and the first discharge check valve 220 or the second discharge check valve 240 in communication with the volume change space to be compressed is in an open state. Will become the edge of the storage unit 110 It can be discharged to the ground connector (50). As the rotor rotates, the volumetric variable space expands and compresses repeatedly, and the suction and discharge of groundwater are repeated. This has the advantage of having a high suction force and generating a high pressure. Furthermore, since the volumetric fluctuations in the rotor housing are simultaneously generated in three compartments, a large amount of groundwater can be sucked, and groundwater can be pumped at a deep depth requiring high pressure, and the groundwater harvesting can be maximized.
  • the rotary piston pump 1000 may further include a motor housing 500.
  • the motor housing 500 is installed on the upper side of the rotor housing 100, and communicates with the first discharge check valve 220 and the second discharge check valve 240, and accommodates the motor 400.
  • the machine room part 510 is formed.
  • the rotor housing 100 has the first inlet check valve 210 and the second inlet check valve 230 are arranged in the left and right directions, the first discharge check valve 220 and the second discharge check valve ( 240 may be arranged in the front-rear direction. That is, the first inlet check valve 210 and the second inlet check valve 230 and the first discharge check valve 220 and the second discharge check valve 240 are arranged in a direction perpendicular to each other.
  • first inlet check valve 210 and the second inlet check valve 230 and the first discharge check valve 220 and the second discharge check valve 240 are formed to be arranged in a direction perpendicular to each other.
  • the rotation of the rotor 300 is preferable because it can effectively utilize the cycle of the expansion and compression of the plurality of volume change space.
  • FIG. 5 is a perspective view of a rotor according to the present invention.
  • the rotary piston pump 1000 may further include a rotor seal 610 and an elastic material 620.
  • the rotor seal 610 is installed at a portion in contact with the inner surface of the rotor housing 100 on the outer circumferential surface of the rotor 300.
  • the rotor seal 610 may be formed in a fusiform in order to maximize the air tightness with the rotor housing 100.
  • the elastic material 620 is installed between the inner surface of the rotor seal 610 and the inner surface of the rotor 300 serves as a kind of spring to absorb the impact applied to the rotor seal 610.
  • the outer circumferential surface of the rotor housing 100 may be applied to three or more epitroid curved surfaces as well as two epitroid curved surfaces, and may be variously modified.
  • the rotor housing 100 is composed of one, the rotor housing 100 including the rotor 300 may be modified to connect a plurality of rotor housings 100 in the vertical direction.
  • the motor housing 500 including the motor 400 may be modified to further connect to the lower portion of the rotor housing 100. This further increases the performance (both pumped and lift) of the rotary piston pump in boreholes with limited installation area.
  • the present invention can be transformed into a fluid transfer device, a high pressure pump, a pressure tester, or a high pressure generator in the ground as well as pumping groundwater, and the structure is simple and can be miniaturized.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

La présente invention concerne une pompe à piston rotatif pour prélever l'eau souterraine se trouvant à une profondeur spécifique d'un trou de forage, et la pompe à piston rotatif selon la présente invention permet d'augmenter ou de réduire une pluralité d'espaces de volume variable sous l'effet de la rotation d'un rotor de telle sorte qu'un premier clapet antiretour d'entrée et un deuxième clapet antiretour d'entrée soient dans un état fermé ou dans un état ouvert pour l'introduction, dans une partie de réception, de l'eau souterraine se trouvant dans un puits de forage ; et de telle sorte qu'un premier clapet antiretour de sortie et un deuxième clapet antiretour de sortie soient dans un état fermé ou dans un état ouvert de décharge, vers un tuyau de raccordement avec le sol, de l'eau souterraine se trouvant dans la partie de réception de telle sorte que l'eau souterraine introduite dans un boîtier de rotor puisse être déchargée dans le sol. Étant donné que des espaces de volume variable sont augmentés et réduits de manière répétée par la rotation d'un rotor, l'eau souterraine est aspirée et déchargée de manière répétée, ce qui permet d'obtenir une puissance d'aspiration élevée et de générer simultanément une haute pression. En outre, comme des variations de volume à l'intérieur d'un boîtier de rotor se produisent simultanément dans trois divisions, une grande quantité d'eau souterraine peut être aspirée.
PCT/KR2016/010262 2015-09-16 2016-09-12 Pompe à piston rotatif WO2017048015A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MYPI2018701000A MY187386A (en) 2015-09-16 2016-09-12 Rotary piston pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2015-0130956 2015-09-16
KR1020150130956A KR101655160B1 (ko) 2015-09-16 2015-09-16 로터리 피스톤 펌프

Publications (1)

Publication Number Publication Date
WO2017048015A1 true WO2017048015A1 (fr) 2017-03-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/010262 WO2017048015A1 (fr) 2015-09-16 2016-09-12 Pompe à piston rotatif

Country Status (3)

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KR (1) KR101655160B1 (fr)
MY (1) MY187386A (fr)
WO (1) WO2017048015A1 (fr)

Cited By (1)

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CN109944796A (zh) * 2019-04-25 2019-06-28 杭州三花研究院有限公司 油泵

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KR101857878B1 (ko) 2016-11-11 2018-05-15 주식회사 지엔에스엔지니어링 유로 폐쇄형 복동식 양수펌프
WO2018106003A2 (fr) * 2016-12-06 2018-06-14 한국원자력연구원 Pompe à huile de moteur
KR101978737B1 (ko) * 2016-12-06 2019-05-15 한국원자력연구원 엔진 오일 펌프
KR101833212B1 (ko) * 2016-12-15 2018-03-02 한국원자력연구원 고압 로터리 피스톤 펌프
KR101934401B1 (ko) 2017-03-31 2019-01-02 한국원자력연구원 고수압 방수 챔버
KR101881546B1 (ko) * 2017-06-09 2018-07-25 한국원자력연구원 진공 자흡 가압 펌프
KR20190018359A (ko) 2017-08-14 2019-02-22 최병철 맥동저감수단이 구비된 삼각 로터리 펌프
KR101915976B1 (ko) 2017-09-12 2018-11-07 한국원자력연구원 로터리 피스톤 펌프 및 그 구동 방법
KR101857939B1 (ko) 2018-01-29 2018-05-15 주식회사 지엔에스엔지니어링 유로 폐쇄형 복동식 양수펌프
KR102014264B1 (ko) 2018-03-08 2019-08-27 한국원자력연구원 로터리 펌프
KR102003985B1 (ko) 2018-07-03 2019-07-25 한국원자력연구원 유체 이송 장치
CN109723424B (zh) * 2018-12-11 2022-04-15 中煤科工集团西安研究院有限公司 一种井下钻孔放水量预测方法
KR102254882B1 (ko) 2020-06-01 2021-05-24 한국원자력연구원 유체 이송 장치
CN114635676B (zh) * 2022-03-08 2023-11-07 山东科技大学 用于低渗难润煤层的间歇性加压注水孔内转子装置及方法
KR102511792B1 (ko) * 2022-05-13 2023-03-17 김병우 사인 로터리 기관

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