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WO2017209387A1 - Capot d'admission comportant des aubes variables et pompe comportant ledit capot d'admission comportant des aubes variables - Google Patents

Capot d'admission comportant des aubes variables et pompe comportant ledit capot d'admission comportant des aubes variables Download PDF

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Publication number
WO2017209387A1
WO2017209387A1 PCT/KR2017/003733 KR2017003733W WO2017209387A1 WO 2017209387 A1 WO2017209387 A1 WO 2017209387A1 KR 2017003733 W KR2017003733 W KR 2017003733W WO 2017209387 A1 WO2017209387 A1 WO 2017209387A1
Authority
WO
WIPO (PCT)
Prior art keywords
bushing
vane
cover body
angle setting
angle
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2017/003733
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English (en)
Korean (ko)
Inventor
오상현
오성현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jichun Pump Industry Co ltd
Original Assignee
Jichun Pump Industry Co ltd
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 Jichun Pump Industry Co ltd filed Critical Jichun Pump Industry Co ltd
Publication of WO2017209387A1 publication Critical patent/WO2017209387A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable

Definitions

  • the present invention relates to a suction cover and a pump provided with a variable vane for guiding and suctioning the movement of the fluid is sucked installed in the suction port of the pump.
  • the pump is a device installed in the sump to suck and discharge the fluid, and includes an impeller for generating a suction force, a pump casing formed with an inlet and a discharge port surrounding the impeller to suck and discharge the fluid, and a drive motor for driving the impeller It is configured by.
  • the conventional suction cover has a problem in that the efficiency of the pump is lowered by generating a vortex according to the size or type of the pump because the installation angle of the vane cannot be set.
  • Patent Document 1 Korean Patent Registration Publication No. 10-1596902 (registered Feb. 2016)
  • Patent Document 2 Korean Patent Registration Publication No. 10-1397629 (2014.5.14. Registration)
  • Patent Document 3 Korean Registered Patent Publication No. 10-0251030 (registered on January 1, 2000)
  • the present invention has been made to solve the problems described above, the problem to be solved by the present invention is to set the angle of the vanes according to the pump can not only improve the efficiency and lift of the pump and reduce the power consumption To provide a suction cover and a pump having the same, which is provided with a variable vane that can easily set and install the angle of the vane from the outside.
  • the suction cover is provided with a variable vane according to an embodiment of the present invention for solving the above problems is a cover body of the penetrating form is installed in the suction port of the pump, a plurality of radially coupled to the inner circumference of the cover body is sucked into the suction port
  • the suction cover is provided with a variable vane for guiding the movement of the fluid
  • the cover body is a plurality of shaft holes formed around the cover body for fixing the vane located on the inner circumference of the cover body from the outside of the cover body, A bushing groove formed at each portion of the cover body in which the shaft hole is formed, and a plurality of angle setting grooves formed at predetermined angles on an inner circumference of the bushing groove, and the vanes are fitted into and sucked from the inside of the shaft hole.
  • a bushing fitting having at least one plane to prevent rotation at said shaft hole by fluid
  • a coupling shaft portion including a nut coupling portion formed with a threaded end of the bushing fitting portion, which is fitted between the bushing groove and the bushing fitting portion and is fitted to any one of a plurality of angle setting grooves on an outer circumferential surface to set an installation angle of the vane.
  • An angle setting bushing comprising an angle setting projection, and a coupling nut fastened to the nut coupling portion of the coupling shaft while the angle setting bushing is inserted into the bushing groove.
  • the angle setting bushing may include a separation screw part which extends in the direction in which the coupling shaft part is fitted and a thread is formed on the outer circumference thereof so that a separation nut is fastened to separate the angle setting bushing from the bushing groove.
  • the coupling shaft portion may include an installation scale formed at the end of the coupling shaft portion to indicate the installation angle of the vane as a portion penetrating toward the center of the coupling nut in a state that the coupling nut is fastened to the coupling shaft portion.
  • the vane may be installed by partially cutting an end portion protruding into the central portion of the cover body, and may include a flexible portion that is flexibly flexed to counter the force of the fluid guided by the vane and the suction force sucked into the suction port. .
  • the angle setting groove may be formed so that the vanes are twisted at an angle of 12.5 ° on a vertical line.
  • a pump having a suction cover with a variable vane according to an embodiment of the present invention includes a suction cover with a variable vane according to the above-described embodiment, a pump casing having a suction port at which the suction cover is installed, and installed inside the pump casing. It includes an impeller, and a drive motor for driving the impeller.
  • the present invention by setting the angle of the vane optimized according to the pump, it is possible to improve the efficiency, lift of the pump, and reduce the power consumption.
  • the vane is provided with a soft portion may prevent the suction force of the pump and the forcing force of the fluid movement by the vane is conflicted to reduce the pump efficiency due to vortex.
  • FIG. 1 is a perspective view illustrating a suction cover provided with a variable vane according to an embodiment of the present invention.
  • Figure 2 is a side cross-sectional view showing a suction cover is installed variable vanes according to an embodiment of the present invention.
  • FIG 3 is a plan sectional view showing a suction cover provided with a variable vane according to an embodiment of the present invention.
  • FIG. 4 is a perspective view illustrating a bushing groove of a suction cover having a variable vane according to an exemplary embodiment of the present invention.
  • FIG. 5 is a perspective view showing the vane of the suction cover is installed variable vanes according to an embodiment of the present invention.
  • Figure 6 is a perspective view of the angle setting bushing of the suction cover is provided with a variable vane according to an embodiment of the present invention.
  • FIG. 7 is a side view of a suction cover provided with a variable vane according to an exemplary embodiment of the present invention and is a view for explaining a state of setting and fixing the angle of the vane.
  • FIG. 8 is a view showing the fluid movement pressure when the installation angle of the vane of the suction cover is installed variable vanes according to an embodiment of the present invention is 0 °.
  • FIG. 9 is a view showing the fluid movement pressure when the installation angle of the vane of the suction cover is installed variable vanes according to an embodiment of the present invention 12.5 °.
  • FIG. 10 is a side cross-sectional view of the suction cover with a variable vane according to an embodiment of the present invention applied to a submersible pump.
  • Figure 11 is a side cross-sectional view of the suction cover is equipped with a variable vane according to an embodiment of the present invention applied to the submersible axial pump.
  • FIG. 12 is a side cross-sectional view of a suction cover provided with a variable vane according to an embodiment of the present invention to a axial pump.
  • FIG. 13 is a side sectional view of a suction cover having a variable vane according to an exemplary embodiment of the present invention applied to a vertical axis pump;
  • FIG. 14 is a side cross-sectional view of a suction cover with a variable vane according to an embodiment of the present invention applied to a double suction pump.
  • the suction vane 100 is provided with a variable vane according to an embodiment of the present invention may include a cover body (110).
  • the cover body 110 may be formed in a penetrated shape so that the upper portion has a diameter of the suction port so that the fluid sucked into the suction port of the pump 200 can be guided.
  • cover body 110 may be formed in a curved shape in which the inner diameter is gradually increased toward the lower portion of the lower portion so that the fluid can be flexibly sucked around the periphery of the cover body 110.
  • the circumference of the cover body 110 may be formed through the shaft hole 113 is coupled to each of the vanes 120 to be described below.
  • a bushing groove 115 may be formed on an outer surface of the cover body 110, and the bushing groove 115 may be formed to have a larger circumference than the shaft hole 113 in each of the shaft holes 113. have.
  • a plurality of angle setting grooves 116 may be formed at an inner circumference of the bushing groove 115 so as to be spaced apart at a predetermined angle R so as to set and install the installation angle R of the vane 120.
  • the suction cover 100 is provided with a variable vane according to an embodiment of the present invention may include a vane (120).
  • the vane 120 may be radially disposed on the inner circumference of the cover body 110 to guide the movement of the fluid sucked into the inlet of the pump 200 through the inside of the cover body 110.
  • the vanes 120 may be formed in the shape of a plate, installed in each of the shaft hole 113 is formed in a form that is built up inside the cover body 110 can be installed a plurality of radial of the cover body 110. have.
  • the vane 120 may include a soft part 121.
  • the soft part 121 may be formed of a material that is flexibly bent by the fluid to be sucked, and the soft part 121 partially cuts and cuts the upper part of the end facing the central part of the cover body 110. Can be installed on
  • the soft part 121 when the soft part 121 is formed from the entire end of the end of the vane 120, that is, from the lower end of the vane 120, the soft part 121 may be folded by the fluid to be sucked and may be resisted to the fluid to be sucked. Since it is possible to cut the upper end of the vane 120 and to install a soft portion 121 in the portion.
  • the vane 120 is inclined from the cover body 110 at a predetermined angle (R) by the angle setting groove 116 to bend flexibly in the direction in which the fluid is rotated by the impeller 230 is sucked. Can be installed.
  • the vane 120, the vane 120 may include a coupling shaft (125).
  • the coupling shaft 125 may be formed in a rod shape and protrude in a horizontal direction from the side end of the vane 120, and may couple the vane 120 to the cover body 110.
  • the coupling shaft 125 is formed to have a diameter that is inserted into the shaft hole 113, the nut coupling portion 124 is formed on the outer peripheral surface of the end of the coupling shaft is screwed coupling nut 140 to be described later Can be.
  • a bushing fitting portion 123 into which the angle setting bushing 130 to be described below may be formed at the center portion of the coupling shaft 125, that is, between the vane 120 and the nut coupling portion 124.
  • the circumference of the bushing fitting portion 123 may be formed to have a shape that is cut to have at least one or more planes 123a to prevent slippage of the angle setting bushing 130 fitted to the bushing fitting portion 123. .
  • an installation scale 127 may be formed on an end surface of the coupling shaft 125 to indicate a direction in which the vanes 120 are erected from the coupling shaft 125.
  • the vanes 120 are installed on the inner circumference of the cover body 110, it is difficult to grasp the rotated state of the vanes 120 from the outside of the cover body 110, so that the installation scale 127 is formed.
  • the outside of the cover body 110 can easily grasp the angle (R) installed by the rotation of the vanes 120.
  • the suction vane 100 is provided with a variable vane according to an embodiment of the present invention may include an angle setting bushing (130).
  • the angle setting bushing 130 may fix the vane 120 to the cover body 110 by setting the installed angle R of the vane 120.
  • the angle setting bushing 130 may include a bushing hole 131 into which the coupling shaft 125 is fitted, and the bushing hole 131 may include at least one plane 123a formed of the coupling shaft 125. It is formed in a shape corresponding to the formed circumferential shape can prevent the coupling shaft 125 is rotated by sliding in the angle setting bushing (130).
  • the outer circumferential surface of the angle setting bushing 130 may be formed in a shape corresponding to the bushing groove 115 so that the angle setting bushing 130 may be seated in the bushing groove 115, and the outer circumferential surface of the angle setting bushing 130 may be disposed on the outer circumferential surface of the angle setting bushing 130.
  • An angle setting protrusion 135 fitted into one of the angle setting grooves 116 of the plurality of angle setting grooves 116 may be formed.
  • the angle setting bushing 130 is fitted so as not to slip on the coupling shaft portion 125 of the vane 120, and the angle setting protrusion 135 is inserted into the plurality of angle setting grooves 116. Since only the setting position of the angle setting protrusion 135 is selected, the installation angle R of the vane 120 can be changed.
  • the vane 120 is externally checked without checking the vane 120 located inside the cover body 110.
  • the installation angle R of 120 may be set and fixed.
  • angle setting bushing 130 may be formed with a separate screw portion 133 protruding to the outside in a state seated in the bushing groove 115, a screw thread may be formed on the outer surface of the separation screw portion 133.
  • the angle setting bushing 130 is inserted between the bushing groove 115 and the coupling shaft portion 125, so that the angle setting bushing 130 is removed. It should be separated from the bushing groove 115 and the coupling shaft portion 125, but because the angle setting bushing 130 is positioned in the inserted state in the bushing groove 115 for a long time it is not easy to remove due to the mutual fixation.
  • a separation screw portion 133 protruding from the bushing groove 115 to the outside is formed, and the separation nut is separated when the angle setting bushing 130 is removed.
  • the angle setting bushing 130 can be easily removed by the screwing force.
  • the suction vane 100 in which the variable vane is installed may include a coupling nut 140.
  • the coupling nut 140 is fastened to the coupling shaft 125 in a state in which the angle setting bushing 130 is fitted to the coupling shaft 125 so that the angle setting bushing 130 is seated in the bushing groove 115 so that the vane 120 in the cover body 110 is fixed. It is possible to prevent the departure.
  • the coupling nut 140 may be formed on the inner circumference of the screw thread and the screw thread formed on the nut fastening portion 124 of the coupling shaft 125.
  • the suction cover is provided with a variable vane according to an embodiment of the present invention, as shown in Figures 10 to 14, the submersible pump, the subaxial pump, the vertical pump, the vertical pump, etc. Applicable to most pumps.
  • the pump 200 having a suction cover 100 is provided with a variable vane according to an embodiment of the present invention may include a pump casing (210).
  • the pump casing 210 may be formed with a suction port for sucking the fluid stored in the sump and the discharge port for discharging the fluid sucked into the suction port.
  • the pump 200 having the suction cover 100 having the variable vane installed therein may include an impeller 230.
  • the impeller 230 is installed inside the pump casing 210 to generate a suction force as it rotates to suck the fluid into the suction port and discharge the sucked fluid to the discharge port.
  • the pump 200 having the suction cover 100 provided with the variable vane may include a driving motor 250.
  • the drive motor 250 may be rotated by electricity to rotate the impeller 230.
  • the driving motor 250 is wrapped with the pump casing 210 according to the type of the pump 200 may be located in the interior of the sump, the impeller 230 is located in the water outside of the sump. Only the drive shaft may be configured in the form.
  • the pump 200 having the suction cover 100 having the variable vane installed therein may include the suction cover 100 having the variable vane installed according to the exemplary embodiment of the present invention.
  • the suction cover 100 may be coupled to the pump 200 in a form in which the flange 111 of the cover body 110 is fastened with a bolt around the periphery of the suction port.
  • the suction cover 100 is the vane 120 is located on the inner circumference of the cover body 110, the coupling shaft portion 125 formed on the side end of the vane 120 is fitted into the shaft hole 113 of the cover body 110 Loss is combined in form.
  • the angle setting bushing 130 is inserted into the coupling shaft portion 125 protruding into the shaft hole 113 from the outside of the cover body 110.
  • the inner peripheral surface of the angle setting bushing 130 to be fitted to the coupling shaft 125 is formed to have a plane (123a) corresponding to the bushing fitting portion 123 of the coupling shaft 125 and the angle setting bushing 130 and
  • the coupling shaft 125 may be rotated together, and the angle setting protrusion 135 is formed around the angle setting bushing 130 so that the angle setting protrusion 135 is formed in the bushing groove 115.
  • Installation of the angle setting protrusion 135 is fitted into the angle setting groove 116 of the desired angle R which is set in advance in the installation of 116.
  • the vane 120 covers the vane 120 in the form of fastening the coupling nut 140 to the nut coupling portion 124 of the coupling shaft 125 while the angle setting bushing 130 is fitted to the coupling shaft 125.
  • the coupling shaft 125 is fastened through the coupling nut 140, and the installation scale 127 is formed at the end surface of the coupling shaft 125, so that the vane 120 is only confirmed by the installation scale 127.
  • Installed angle (R) and direction can be confirmed from the outside.
  • the coupling nut 140 is separated from the coupling shaft 125, and the separation nut is fastened to the separation screw part 133 of the angle setting bushing 130.
  • the angle setting groove 116 is formed so that the angle of the vane 120 is inclined at 12.5 °.
  • the fluid is rotated by the impeller 230.
  • the acceleration of the sucked fluid is increased, so that the head of the pump 200 can be improved, and the contact angle with the impeller 230 is optimized to adjust the discharge flow of the fluid to the discharge side.
  • the efficiency of the pump 200 can be increased.
  • the applicant has a vane 120, the suction cover 100 is installed with a variable vane having an installation angle (R) of 0 °, and the vane 120 This simulation was performed assuming that the suction cover 100 installed with a variable vane having an installation angle R of 12.5 ° was installed in the same pump 200. (The simulation is performed using ANSYS R15.0, a fluid analysis program. )
  • FIG. 8 is a view showing a fluid movement analysis when the installation angle of the vane 120 is 0 °
  • FIG. 9 is a view showing a fluid movement analysis when the installation angle of the vane 120 is 12.5 °. As can be seen that when the installation angle of the vane 120 is 12.5 °, it can be seen that a stronger suction force is generated around the vane 120.
  • [Table 1] is a table comparing the efficiency and the lift of the pump 200 when the installation angle of the vanes 120 is 0 ° and 12.5 °.
  • the suction cover 100 provided with a variable vane according to an embodiment of the present invention can easily fix the vane 120 installed inside the cover body 110 by setting an angle R from the outside.
  • the installation angle R of the vane 120 may be accurately and easily set by inserting the angle setting protrusion 135 of the angle setting bushing 130 into the preset angle setting groove 116.
  • the installation angle (R) of the vane 120 of the suction cover 100 is set in advance to an optimized 12.5 ° to improve the head of the pump 200 and at the same time reduce the power consumption of the pump 200, The efficiency of 200 can be improved.
  • angle setting bushing 130 is provided with a separation screw portion 133 to easily separate the angle setting bushing 130.
  • the vane 120 is provided with a soft portion 121, so that the suction force and the forcing force of the fluid movement by the vane 120 may be conflicted to prevent the generation of vortices, thereby improving the efficiency of the pump 200.
  • suction cover 110 cover body
  • angle setting protrusion 140 coupling nut
  • the present invention can be used in the field of water treatment related to water.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne un capot d'admission comportant des aubes variables et une pompe comportant ledit capot d'admission comportant des aubes variables, lequel capot d'admission est placé au niveau d'un orifice d'admission de la pompe afin de guider le mouvement de fluide aspiré et à aspirer ledit fluide. Selon un mode de réalisation de la présente invention, le capot d'admission comportant les aubes variables comporte : un corps de capot comportant une forme pénétrée et disposé au niveau de l'orifice d'admission de la pompe ; et la pluralité d'aubes variables accouplées radialement à la périphérie interne du corps de capot afin de guider le mouvement du fluide aspiré à travers l'orifice d'aspiration, le corps de capot comprenant : une pluralité de trous d'arbre formés à la périphérie du corps de capot afin de fixer, à partir de l'extérieur du corps de capot, les aubes positionnées à la périphérie interne du corps de capot ; des rainures de douille formées à chaque partie du corps de capot, au niveau desquelles sont formés les trous d'arbre ; et une pluralité de rainures d'établissement d'angle formées selon un angle pré-établi aux périphéries internes des rainures de douille, et l'aube comprenant une partie d'arbre d'accouplement comprenant : une partie d'adaptation de douille adaptée à partir de l'intérieur du trou d'arbre, et comportant au moins un plan afin d'empêcher la rotation de cette dernière, dans le trou d'arbre, provoquée par le fluide aspiré ; et une partie de fixation d'écrou, comportant des filetages, à l'extrémité de la partie d'adaptation de douille, et le capot d'admission comprenant en outre : une douille d'établissement d'angle adaptée entre la rainure de douille et la partie d'adaptation de douille, et comportant, sur sa surface périphérique externe, une saillie d'établissement d'angle adaptée dans l'une quelconque de la pluralité de rainures d'établissement d'angle afin d'établir un angle de disposition de l'aube ; et un écrou d'accouplement fixé à la partie de fixation d'écrou d'un arbre d'accouplement dans un état dans lequel la douille d'établissement d'angle est adaptée dans la rainure de douille. Par conséquent, un angle optimisé de l'aube peut être établi, ce qui permet d'augmenter le rendement et le différentiel de pression de la pompe et de réduire la consommation d'énergie.
PCT/KR2017/003733 2016-05-30 2017-04-05 Capot d'admission comportant des aubes variables et pompe comportant ledit capot d'admission comportant des aubes variables Ceased WO2017209387A1 (fr)

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KR10-2016-0066747 2016-05-30
KR1020160066747A KR101701159B1 (ko) 2016-05-30 2016-05-30 가변형 베인이 설치된 흡입커버 및 이를 구비한 펌프

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CN108959762A (zh) * 2018-06-29 2018-12-07 江铃汽车股份有限公司 一种高效衬套拟合方法
KR102165973B1 (ko) * 2020-03-27 2020-10-15 주식회사 대영파워펌프 와류방지구를 구비한 원심펌프
KR102210485B1 (ko) * 2020-10-30 2021-01-29 고일영 충격완충구조를 갖는 육상펌프
KR102527881B1 (ko) * 2022-11-18 2023-05-02 (주)한국펌프앤시스템즈 회전식 흡입가이드 받침대를 장착한 수중펌프
KR20250150897A (ko) 2024-04-12 2025-10-21 한국생산기술연구원 디퓨저 베인 및 가이드 베인의 설치 각도를 조절할 수 있는 터빈으로 작동 가능한 축류 펌프

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JPH08105394A (ja) * 1994-10-04 1996-04-23 Shuichi Kitamura ベーンポンプ
KR20040100503A (ko) * 2003-05-23 2004-12-02 두산중공업 주식회사 패킹상자와 실커버의 분리를 위한 암나사공이 형성된 펌프
KR20130098043A (ko) * 2012-02-27 2013-09-04 삼성테크윈 주식회사 인렛 가이드 베인 어셈블리
KR101593648B1 (ko) * 2015-09-07 2016-02-12 강원대학교 산학협력단 축류 펌프 또는 사류 펌프의 가변 안내 깃 제어 장치 및 방법

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