KR101930795B1 - Centrifugal Jet Pump - Google Patents

Centrifugal Jet Pump Download PDF

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Publication number
KR101930795B1
KR101930795B1 KR1020170023247A KR20170023247A KR101930795B1 KR 101930795 B1 KR101930795 B1 KR 101930795B1 KR 1020170023247 A KR1020170023247 A KR 1020170023247A KR 20170023247 A KR20170023247 A KR 20170023247A KR 101930795 B1 KR101930795 B1 KR 101930795B1
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KR
South Korea
Prior art keywords
impeller
casing
casing portion
pump
space
Prior art date
Application number
KR1020170023247A
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Korean (ko)
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KR20180096895A (en
Inventor
김동섭
이기범
이동건
주남식
나정수
Original Assignee
(주)엘넷
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.)
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Publication date
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Priority to KR1020170023247A priority Critical patent/KR101930795B1/en
Priority to PCT/KR2017/003894 priority patent/WO2018155762A1/en
Publication of KR20180096895A publication Critical patent/KR20180096895A/en
Application granted granted Critical
Publication of KR101930795B1 publication Critical patent/KR101930795B1/en

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    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • F04D29/245—Geometry, shape for special effects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The present invention can provide a centrifugal jet pump of a new structure capable of implementing a high-speed centrifugal pump with only a single-stage impeller by applying the principle of the ejector pump to a centrifugal pump.

Description

Centrifugal jet pump < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal pump, and more particularly, to a centrifugal jet pump in which the principle of an ejector pump is applied to a centrifugal pump.

The centrifugal pump is a device for pumping the transfer liquid by using centrifugal force. It has a large capacity compared to a positive displacement pump and has fewer faults to foreign substances. Therefore, it is widely used including general pumps and plant pumps.

On the other hand, centrifugal pumps are usually operated with 4-pole 1780 RPM using three-phase induction motor, which can not produce high pressure, low quantitativeness, low efficiency of leakage loss, and large weight and product size. And the like.

Korean Utility Model No. 20-0443477 entitled "Centrifugal Pump for Mixture of Liquid and Gas" (registered on Feb. 11, 2009)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems of the prior art as described above, and it is an object of the present invention to provide a centrifugal pump having a novel centrifugal jet pump capable of implementing a high- I want to.

According to an aspect of the present invention, there is provided a suction unit comprising: a casing unit for a suction body having a suction port formed in an upper side direction and a lower end opened; a casing unit for a suction pipe extending from the suction port; An impeller upper casing portion extending obliquely downward from a lower end portion of the casing portion; and an upper casing portion extending horizontally from a lower portion of the upper casing portion for the impeller to form an impeller rotation space together with the upper casing portion for the impeller, A lower casing portion for an impeller which forms a gap for a casing injection nozzle between the upper casing portion and the lower casing portion, and a lower portion of the upper casing portion for the impeller and a lower casing portion for the impeller to form a diffuser chamber, The diffuser chamber has a gap for the injection nozzle for the casing A casing portion for a diffuser which is provided with a space for increasing the flow passage area gradually increasing in cross-sectional area toward the outside in the radial direction; a casing portion for the discharge pipe connected to the casing portion for the diffuser; A casing formed with a channel guide protrusion formed to extend downward from the casing; A pump rotating shaft disposed vertically along a horizontal center of the casing for the suction body and a horizontal center of the impeller rotating space; A driving motor provided at an upper portion of the casing for rotationally driving the pump rotation shaft; A boss coupled to the pump rotation shaft; a lower plate for a impeller which is horizontally disposed around the boss and provided on an upper portion of the lower casing for the impeller; a lower plate for an impeller which is protruded upward from an upper surface of the lower plate for the impeller, A plurality of rotary blades arranged in a circle around the center of the impeller, a plurality of rotary blades arranged in a circular shape about the center of the impeller, A space for reducing the flow passage area gradually decreases toward the outer side in the radial direction on the outer side of the space for forming the rotary vane while forming a space for rotating vanes in which the plurality of rotary vanes are provided between the lower vane and the lower plate, A gap for the impeller nozzle for the impeller is formed between the edges of the lower plate for the impeller The impeller comprises a top plate for the truncated cone shape of the impeller; And a control unit.

Wherein: the self-absorption pipe for connecting the casing portion for the discharge tube to the casing portion for the suction body is provided; The self-absorption pipe is provided with a self-absorption check valve for blocking or allowing the flow from the discharge pipe casing to the suction body casing, Wherein the self-absorption check valve comprises: a guide column vertically provided along an inner center of a portion where the self-absorption pipe vertically extends; a valve body provided so as to be movable up and down along the guide column; And a valve seat portion configured to block communication between the casing portion for the suction body and the casing portion for the discharge pipe when the valve body moves upward.

As described above, according to the present invention, a centrifugal pump having only one impeller can provide a centrifugal jet pump of a new structure capable of realizing high-speed and high-speed.

1 is a view for explaining the principle of a conventional ejector pump,
2 is a sectional view of a centrifugal jet pump according to a first embodiment of the present invention,
3 is an exploded perspective view of the impeller of FIG. 2,
Fig. 4 is a perspective view of the impeller of Fig. 3,
5 is a sectional view of a centrifugal jet pump according to a second embodiment of the present invention,
6 is a bottom perspective view of the centrifugal jet pump of Fig. 5 except for the drive motor. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention in the drawings, portions not related to the description are omitted, and like reference numerals are given to similar portions throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

The principle of the ejector pump is applied to a rotating centrifugal pump.

First, the principle of the ejector pump will be described with reference to FIG.

1 is a view for explaining the principle of a conventional ejector pump.

The ejector pump is a device that feeds a substance (inlet gas, liquid, or solid phase powder) to be transferred to a high-speed flow (Motive Fluid) made through a nozzle and is used as a transfer device or a vacuum pump. It has features that can be done.

The high-speed flow ejected from the nozzle has a function of passing the object through the inlet nozzle by the collision between the molecules and allowing the outlet head to be converted to the pressure head by the outlet diffuser. Since the flow is carried out by collision between the molecules, , Since there is a characteristic of being able to transfer not only liquid phase but also fine solid phase, the transferred gas liquid is a result of increasing the pressure on the outlet side.

In addition, since the nozzle passage that is ejected can not be leaked as long as the back pressure is not larger than the inlet side, it is also used as a vacuum pump using the nozzle passage.

The principle of this ejector pump is applied to this centrifugal jet pump.

First, a first embodiment according to the present invention will be described.

FIG. 2 is a cross-sectional view of a centrifugal jet pump according to a first embodiment of the present invention, FIG. 3 is an exploded perspective view of the impeller of FIG. 2, and FIG. 4 is an assembled perspective view of the impeller of FIG.

The centrifugal jet pump mainly comprises a casing 100, an impeller 200, and a driving motor 300.

The structure of the casing 100 will be described.

The casing 100 includes a casing portion 110 for a suction pipe and a casing portion 120 for a suction body to which a fluid is largely sucked, an upper casing portion 130 for the impeller forming the impeller rotation space, and a lower casing portion 140 for the impeller A casing unit 150 for a diffuser which forms a diffuser chamber on the outside of the impeller rotating space in a radial direction, and a casing unit 160 for a discharge pipe through which fluid is discharged.

The casing 120 for the suction body has a suction port 121 formed in the upper direction and a lower end opened.

The casing portion 110 for the suction pipe is extended from the suction port 121 of the casing portion 120 for the suction body.

An impeller rotation space is formed at a lower end of the casing unit 120 for the suction body, and an upper casing unit 130 for the impeller and a lower casing unit 140 for the impeller are formed to form the impeller rotation space.

The impeller upper casing unit 130 is shaped to extend obliquely downward from the lower end of the casing unit 120 for the suction body. That is, it has a truncated cone shape.

The lower casing portion 140 for the impeller is formed to extend horizontally from the lower portion of the upper casing portion 130 for the impeller.

Therefore, the impeller rotation space has a truncated cone shape.

A gap 131 for a casing injection nozzle is formed between the edge of the lower casing portion 140 for the impeller and the lower end portion of the upper casing portion 130 for the impeller. The gap 131 for the casing injection nozzle has a very small gap (about 1 mm or less) between the edge of the lower casing portion 140 for the impeller and the lower end portion of the impeller upper casing portion 130, .

On the other hand, the flow path guiding jaw 132 is formed while extending downward from the inside of the upper portion of the upper casing unit 130 for the impeller.

Accordingly, the fluid sucked into the casing 120 for the suction body by the flow path guide jaw 132 flows into the impeller rotating space while being guided downward by the flow path guide jaws 132.

A diffuser chamber is formed outside the impeller rotation space.

In order to form the diffuser chamber, the casing unit 150 for the diffuser, which is connected to the lower end of the upper casing unit 130 for the impeller and the lower casing unit 140 for the impeller, is formed.

The diffuser chamber formed in the diffuser casing portion 150 is provided with a flow path increasing space 151 in which the cross-sectional area of the flow path gradually increases from the casing-use injection nozzle gap 131 toward the radially outward side.

The fluid introduced into the casing part (150) for the diffuser is discharged to the outside through the casing part (160) for the discharge pipe connected thereto.

The pump rotation shaft 310 is disposed vertically along the horizontal center of the casing unit 120 for the suction body of the casing 100 and the horizontal direction of the impeller rotation space. In order to rotationally drive the pump rotation shaft 310 A drive motor 300 is provided above the casing 100.

That is, the pump rotation shaft 310 is rotationally driven by the drive motor 300.

The driving motor 300 adopts the permanent magnet motor technique. In particular, the technique of the permanent magnet motor adopts a magnet embedded type with IPMSM (Interior Permanent Magnet Synchronous Motor), and has a magnetic arrangement of four poles suitable for ultra high speed. In order to maximize the efficiency of the motor, Ndium (rare earth series) Nd-Fe-B 48SH is used as the permanent magnet applied to the rotor, and the core applied to the stator is made of 35PN230, To maximize motor efficiency.

Motor rotation detection (Encoding) and Tacho-meter type encoder (Encoder) and phase measurement Hall sensor (Hall sensor) are applied in parallel to optimize speed control.

In order to maximize the motor efficiency, copper wire with 99.99% purity with low loss of copper wire is used, and the motor cooling adopts the "air cooling method" in which a cooling fan is installed outside the motor.

The inverter that drives the motor is made possible by the "vector-based PWM switching technique", and the driving operation system is designed so that it can be manually controlled for easy operation.

Also, I / O (CAN2.0) connection is designed to enable ICT-based control monitoring.

An impeller 200 is provided inside the impeller rotating space and the impeller 200 is coupled to the pump rotating shaft 310 and rotated together with the pump rotating shaft 310.

The main structure of the impeller 200 will be described.

An impeller bottom plate 220 extending horizontally around the boss 210 coupled to the pump rotational shaft 310 is provided.

The impeller lower plate 220 is provided at an upper portion of the lower casing portion 140 for the impeller so as to maintain a certain distance from the lower casing portion 140 for the impeller.

The impeller lower plate 220 has a disk shape.

A plurality of rotary blades 230 protruding upward from the upper surface of the impeller lower plate 220 are provided and the plurality of rotary blades 230 are arranged in a circular shape with the boss 210 as a center.

A truncated cone-shaped impeller upper plate 240 is coupled to the upper portion of the rotary vane 230.

The upper plate 240 for the impeller is coupled to the rotary vane 230 by the coupling bolt 250.

The impeller top plate 240 is in the form of a truncated cone having a sectional structure formed downwardly sloping outward from the upper end portion.

The upper end of the impeller upper plate 240 is disposed outside the upper portion of the flow guide tab 132.

A rotating blade space 241 and a flow path reducing space 242 are formed between the impeller upper plate 240 and the impeller lower plate 220.

The rotary vane space 241 is provided with a plurality of rotary vanes 230 and the rotary vane space 241 also includes a space in which a plurality of rotary vanes 230 are spaced apart from each other.

The space 242 for reducing the flow path is a space in which the cross-sectional area of the flow passage gradually decreases from the outside of the space 241 for the rotating blades toward the outside in the radial direction.

Further, a gap 243 for the impeller nozzle is formed between the lower end of the impeller upper plate 240 and the lower end of the impeller lower plate 220.

The operation of this centrifugal jet pump will be described.

The fluid introduced through the casing portion 110 for the suction pipe flows into the casing portion 120 for the suction body, flows downward along the flow path guide protrusion 132, and flows into the impeller rotation space.

At this time, if the impeller 200 rotates at a high speed and the rotary vane 230 produces centrifugal force, the fluid passes through the space 242 for reducing the flow rate (which may correspond to the ejector nozzle of the ejector pump) 243, the injected fluid flows into the space for increasing the flow rate of the casing unit 150 for the diffuser (which may correspond to the outlet diffuser of the ejector pump) through the gap 131 for the casing injection nozzle , The fluid is sucked out from the space between the lower casing unit 140 for the impeller and the lower plate 220 for the impeller so that the space between the lower casing unit 140 for the impeller and the lower plate 220 for the impeller becomes vacuum . This is applied to the space between the upper casing unit 130 for the impeller and the upper plate 240 for the impeller.

In other words, the centrifugal jet pump arranges a large number of ejectors on the impeller and acts to pump the ejectors.

Such a centrifugal jet pump can not generate leakage originally in the same manner as the principle of the ejector pump and maintains a vacuum state in a space between the impeller 200 and the casing 100 Even when the impeller rotates at a very high speed, the frictional resistance received from the fluid can be minimized.

Therefore, this centrifugal pump has a very simple structure and can realize high-speed rotation and lifting.

Next, a second embodiment of the present invention will be described.

FIG. 5 is a cross-sectional view of a centrifugal jet pump according to a second embodiment of the present invention, and FIG. 6 is a perspective view of the centrifugal jet pump of FIG.

In the centrifugal jet pump of the second embodiment, the centrifugal jet pump of the first embodiment is provided with a self-exciting function. Hereinafter, description of the same parts as those of the first embodiment will be omitted.

The present embodiment is different from the first embodiment in the shape of the casing portion 110 for the suction pipe and the casing portion 160 for the discharge pipe.

Further, in this embodiment, the self-absorption pipe 170 for connecting the casing unit 160 for the discharge tube and the casing unit 120 for the suction body is provided.

The self-absorption pipe 170 is also provided with a self-absorbing check valve 180 for blocking or allowing the flow from the discharge casing casing 160 to the casing 120 for the suction main body.

The self-absorption check valve 180 includes a guide pillar 181 vertically provided along an inner center of a portion where the self-absorbing pipe 170 extends vertically, and a guide pillar 181 vertically movable along the guide pillar 181 An elastic spring 183 for elastically supporting the valve body 182 in a downward direction and a valve body 182 for opening and closing the valve body 182 when the valve body 182 is moved upward, And a valve seat portion 184 configured to block the communication of the valve seat portion 160.

In order to prevent the transfer liquid from changing into gas phase due to the liquid quality during the pump restarting, it is possible to prevent the pump from being unable to be pumped out when the transfer liquid inside the pump is released when the pump operation is stopped. .

In the centrifugal jet pump equipped with the self-priming function, the valve body 182 of the self-absorption check valve 180 is pushed up and closed by the pressure of the transfer liquid that flows back when the pumping is stopped, so that the transfer liquid remains , The self-absorption check valve (180) is opened by the pressure difference at the time of restarting again, and the remaining transfer liquid is pushed into the impeller rotation space, and the gas liquid again receives the centrifugal force and the pumping is resumed. When the pumping is resumed, The check valve 180 is closed.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the embodiments described above are intended to be illustrative, but not limiting, in all respects. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: casing
110: casing portion for suction pipe
120: casing part for suction body 121: suction port
130: Upper casing part for impeller 131: Gap for injection nozzle for casing
132: a flow guide chin
140: Lower casing part for impeller
150: casing unit for diffuser 151: space for increasing the flow rate
160: casing unit for discharge tube
170: Self-absorption pipe
180: self-absorption check valve 181: guide post
182: valve body 183: elastic spring
184: valve seat portion
200: Impeller
210: Boss
220: Lower plate for impeller
230: Rotating blade
240: upper plate for impeller 241: space for rotating blades
242: Space for reducing the flow path 243: Gap for jet nozzle for impellers
300: drive motor
310: pump rotating shaft

Claims (2)

A casing portion for a suction pipe having a suction port formed in an upper side direction and a lower end opened; a casing portion for a suction pipe extending from the suction port; and an impeller extending obliquely downward from the lower end portion of the casing portion for the suction body, And an impeller rotation space formed in the lower portion of the upper casing portion for the impeller and horizontally extending along with the upper casing portion for the impeller, wherein the impeller rotation space is formed between the rim and the lower end portion of the upper casing portion for the impeller, Wherein the diffuser chamber is connected to a lower end portion of the impeller upper casing portion and an edge of the lower casing portion for the impeller to form a gap for the injection nozzle, Direction of Flow A casing portion for a diffuser, a casing portion for a discharge pipe connected to the casing portion for the diffuser, and a flow path guide portion formed to extend downward from the inside of the upper portion of the upper casing portion for the impeller, A casing in which a jaw is formed;
A pump rotating shaft disposed vertically along a horizontal center of the casing for the suction body and a horizontal center of the impeller rotating space;
A driving motor provided at an upper portion of the casing for rotationally driving the pump rotation shaft;
A boss coupled to the pump rotation shaft; a lower plate for a impeller which is horizontally disposed around the boss and provided on an upper portion of the lower casing for the impeller; a lower plate for an impeller which is protruded upward from an upper surface of the lower plate for the impeller, A plurality of rotary blades arranged in a circle around the center of the impeller, a plurality of rotary blades arranged in a circular shape about the center of the impeller, A space for reducing the flow passage area gradually decreases toward the outer side in the radial direction on the outer side of the space for forming the rotary vane while forming a space for rotating vanes in which the plurality of rotary vanes are provided between the lower vane and the lower plate, A gap for the impeller nozzle for the impeller is formed between the edges of the lower plate for the impeller The impeller comprises a top plate for the truncated cone shape of the impeller;
And the centrifugal jet pump.
The method of claim 1,
A self-absorption pipe for connecting the casing portion for the discharge tube and the casing portion for the suction body is provided; The self-absorption pipe is provided with a self-absorption check valve for blocking or allowing the flow from the discharge pipe casing to the suction body casing, Wherein the self-absorption check valve comprises: a guide column vertically provided along an inner center of a portion where the self-absorption pipe vertically extends; a valve body provided so as to be movable up and down along the guide column; And a valve seat portion for blocking communication between the casing portion for the suction body and the casing portion for the discharge pipe when the valve body is moved upwardly; Wherein the centrifugal jet pump is a centrifugal jet pump.
KR1020170023247A 2017-02-22 2017-02-22 Centrifugal Jet Pump KR101930795B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020170023247A KR101930795B1 (en) 2017-02-22 2017-02-22 Centrifugal Jet Pump
PCT/KR2017/003894 WO2018155762A1 (en) 2017-02-22 2017-04-11 Centrifugal jet pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020170023247A KR101930795B1 (en) 2017-02-22 2017-02-22 Centrifugal Jet Pump

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KR20180096895A KR20180096895A (en) 2018-08-30
KR101930795B1 true KR101930795B1 (en) 2018-12-19

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WO (1) WO2018155762A1 (en)

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AU2019327091B2 (en) 2017-11-01 2022-07-14 Asahi Kasei Kabushiki Kaisha Carbon foam, complex, and production method
CN112555137A (en) * 2020-12-14 2021-03-26 宁波君禾智能科技有限公司 Water pump control system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100545834B1 (en) 2004-04-02 2006-01-26 김일상 A centrifugal pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4355954A (en) * 1980-07-18 1982-10-26 The Maytag Company Pump impeller
KR200229494Y1 (en) * 2001-02-13 2001-07-19 대아기계펌프(주) Centrifugal pump
KR200443477Y1 (en) 2007-10-08 2009-03-19 주식회사 금호펌프 Centrifugal pump for a mixture of liquid and gas
KR101695444B1 (en) * 2016-06-03 2017-01-23 주식회사 호빌스 Pump
KR101670076B1 (en) * 2016-08-25 2016-10-28 권헌실 a Pump having improved pump efficiency

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100545834B1 (en) 2004-04-02 2006-01-26 김일상 A centrifugal pump

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