KR102576224B1 - The impella rotary shaft cooling device of the water pump - Google Patents

The impella rotary shaft cooling device of the water pump Download PDF

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KR102576224B1
KR102576224B1 KR1020210133252A KR20210133252A KR102576224B1 KR 102576224 B1 KR102576224 B1 KR 102576224B1 KR 1020210133252 A KR1020210133252 A KR 1020210133252A KR 20210133252 A KR20210133252 A KR 20210133252A KR 102576224 B1 KR102576224 B1 KR 102576224B1
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chamber
rotating shaft
water pump
impeller
water
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KR1020210133252A
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Korean (ko)
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KR20230050033A (en
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김동수
김용운
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김동수
김용운
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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/11—Kind or type liquid, i.e. incompressible

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

Abstract

본 발명은 양수기의 임펠라 회전축 냉각장치에 관한 것으로 보다 구체적인 것은, 축잡이에 지지되어 전동장치로 회전하는 임펠라 회전축 외면에 냉각장치를 부착하여 양수기의 물이 순환되게 함으로써, 임펠라 회전축을 장시간 회전시켜도 과열되는 일이 없도록 하여 축잡이에서 윤활유가 누출되지 않게 한 양수기의 임펠라 회전축 냉각장치이다.The present invention relates to a cooling device for the impeller rotation shaft of a water pump. More specifically, the cooling device is attached to the outer surface of the impeller rotation shaft, which is supported by a shaft holder and rotated by an electric device, so that the water in the water pump circulates, thereby preventing overheating even if the impeller rotation shaft is rotated for a long time. It is a cooling device for the impeller rotating shaft of a water pump that prevents lubricating oil from leaking from the shaft holder.

Figure R1020210133252
Figure R1020210133252

Description

양수기의 임펠라 회전축 냉각장치{The impella rotary shaft cooling device of the water pump}The impella rotary shaft cooling device of the water pump}

본 발명은 양수기의 임펠라 회전축 냉각장치에 관한 것으로 보다 구체적인 것은, 축잡이에 지지되어 전동장치로 회전하는 임펠라 회전축 외면에 냉각장치를 부착하여 양수기의 물이 순환되게 함으로써, 임펠라 회전축을 장시간 회전시켜도 과열되는 일이 없도록 하여 축잡이에서 윤활유가 누출되지 않게 한 것이다.The present invention relates to a cooling device for the impeller rotation shaft of a water pump. More specifically, the cooling device is attached to the outer surface of the impeller rotation shaft, which is supported by a shaft holder and rotated by an electric device, so that the water in the water pump circulates, thereby preventing overheating even if the impeller rotation shaft is rotated for a long time. This was done to prevent lubricant from leaking from the shaft holder.

종래의 양수기 임펠라 회전축은 축잡이에 장치되어 축잡이와 베어링으로 지지되고, 축잡이 중앙부에 급유공간이 형성되어 주유기를 통해 급유공간으로 윤활유를 공급하고 있다.The conventional water pump impeller rotation shaft is installed on a shaft holder and supported by the shaft holder and bearings, and an oil supply space is formed in the center of the shaft holder, and lubricating oil is supplied to the oil supply space through a lubricator.

따라서 임펠라 회전축을 장시간 회전시키면 과열되어 축잡이에 형성된 급유공간에 공급된 윤활유가 열을 받아 팽창하게 되므로, 베어링부와 리테너부를 통해 누출되기 때문에 주변이 오염되고 윤활유가 낭비되는 불편이 있다.Therefore, when the impeller rotation shaft is rotated for a long time, it overheats and the lubricating oil supplied to the oiling space formed in the shaft holder receives heat and expands, which causes the inconvenience of contaminating the surrounding area and wasting lubricating oil because it leaks through the bearing and retainer parts.

따라서 이를 방지하기 위해 회전축 축잡이에 수조를 형성하여 양수실의 물이 연통되게 한 것이 있으나 이는 축잡이에 연통하는 물의 순환이 느려서 냉각효과가 떨어지는 불편이 있고, 장치가 복잡하여 제작비용이 많이 드는 불편이 있었다.Therefore, in order to prevent this, a water tank was formed in the rotary shaft holder to allow the water in the pumping room to communicate. However, this has the inconvenience of lowering the cooling effect due to the slow circulation of water communicating to the shaft holder, and the device is complicated and expensive to manufacture. There was some inconvenience.

선행기술 실용신안등록 제20-0316246호Prior Art Utility Model Registration No. 20-0316246

본 발명은 상기 불편을 해소하기 위하여 개발된 것이다.The present invention was developed to solve the above inconvenience.

본 발명은 양수기 본체(1a) 내부에 형성한 흡수실(2)에 임펠라수용실(2a)을 형성하여 임펠라(3)를 장치하고, 임펠라수용실(2a) 외주에 흡수실과 구확되어 흡수한 물을 배출구(4a)로 배출하는 배출실(4)을 형성하며, 흡수구(2b)와 반대되는 쪽에 임펠라(3) 회전축(3a)을 지지하는 축잡이(5)를 부착하여 축잡이에 윤활유를 공급하는 주유기(5a)를 형성하고, 축잡이와 회전축 사이에 베어링(B1)(B2)을 장치하며, 임펠라와 회전축이 접속되는 위치에 매카니컬실(6)과 리테너(7)를 장치하고, 회전축 외측단에 회전풀리(8)를 장치하는 전동식 양수기(1)에 있어서, In the present invention, an impeller (3) is installed by forming an impeller receiving chamber (2a) in the absorption chamber (2) formed inside the water pump main body (1a), and the water absorbed is separated from the absorption chamber on the outer periphery of the impeller receiving chamber (2a). It forms a discharge chamber (4) that discharges water to the discharge port (4a), and a shaft handler (5) that supports the rotating shaft (3a) of the impeller (3) is attached to the side opposite to the absorption port (2b) to supply lubricating oil to the shaft handler. A lubricator (5a) is formed, bearings (B1) (B2) are installed between the shaft holder and the rotating shaft, and a mechanical seal (6) and retainer (7) are installed at the position where the impeller and the rotating shaft are connected, In the electric water pump (1) equipped with a rotating pulley (8) at the outer end of the rotating shaft,

축잡이(5) 외측지지부에서 회전풀리(8) 쪽으로 돌출되는 회전축(3a) 외주에 냉각관체(9)를 장치하여 내부에 냉각수수용실(9a)을 형성하고 냉각수수용실(9a)의 입구(9b)와, 배출구(9c)를 양수기의 흡수실(2)의 흡수부와 배출실(4)의 배출부에 통수관(9b')(9c')으로 연결하여 양수기의 물이 냉각수수용실로 강제 순환되게 하고, 냉각관체(9)와 회전축(3a)의 접속부에 리테너(7a)를 장치하여서 되는 구성이다.A cooling conduit body (9) is installed on the outer circumference of the rotating shaft (3a) protruding from the outer support of the shaft holder (5) toward the rotating pulley (8) to form a coolant receiving chamber (9a) inside, and the inlet of the coolant receiving chamber (9a) is ( 9b) and the outlet (9c) are connected to the absorption part of the absorption chamber (2) of the water pump and the discharge part of the discharge chamber (4) with water pipes (9b') (9c'), so that the water in the water pump is forced into the cooling water receiving chamber. This configuration is achieved by allowing circulation and installing a retainer (7a) at the connection between the cooling pipe body (9) and the rotating shaft (3a).

상기에서 냉각관체(9)는 냉각수수용실(9a)을 형성하기 위해 냉각관체본체(9')에 덮개(9")가 구비되고, 냉각관체 본체 외주에 체결구멍(9"')을 형성하여 회전축(3a)에 냉각관체를 끼우고, 축잡이(5) 외측면에 냉각본체 본체와 덮개를 볼트(5b)로 체결하여 고정시키며, 통수관(9b')(9c')은 양단부에 연결나사부(9d)(9e)를 형성하여 흡수실(2)과 배수실(4)의 주벽에 천공한 나사구멍(2')(4')에 결합하고, 일측에 개폐밸브(9d')를 갖추어서 되는 구성이다.In the above, the cooling pipe body (9) is provided with a cover (9") on the cooling pipe body (9') to form a coolant receiving chamber (9a), and a fastening hole (9"') is formed on the outer circumference of the cooling pipe body main body. Insert the cooling pipe into the rotating shaft (3a), and fasten the cooling body and cover to the outer surface of the shaft holder (5) with bolts (5b), and the water pipes (9b') and (9c') have connection threads at both ends. (9d) (9e) are formed and connected to the screw holes (2') (4') drilled in the main walls of the absorption chamber (2) and the drainage chamber (4), and equipped with an opening and closing valve (9d') on one side. It is a configuration that works.

이와 같이 된 본 발명은 축잡이(5) 외측지지부로 돌출된 임펠라 회전축(3a)의 외측단에 회전풀리(8)가 부착되고, 회전풀리와 축잡이 사이에 위치하는 회전축 외면에 냉각관체(9)가 장치되는데 벨트로 연결하여 회전돌출 회전시킴으로써, 양수기가 작동하게 되는데 양수기가 작동하게 되고, 양수기가 작동하게 되면, 흡입실(2)의 흡수구(2b)와 배출실(4)의 배출부에 연결한 통수관(9b')(9c')을 통해 회전축(3a) 외면에 피복한 냉각관체(9)의 냉각수수용실(9a)에 양수기의 물이 강제 순환되므로 냉각관체에 의하여 회전축이 냉각되므로, 회전축(3a)이 과열되지 않아 축잡이(5)에 주입한 윤활유가 과열되지 않으므로, 안정적인 작용을 할 수 있고, 이로인해 윤활유가 팽창하여 누출되는 현상을 예방할 수 있기 때문에 윤활유의 낭비를 막을 수 있고, 베어링과 리테너의 마모를 방지하여 양수기 작동을 안정적으로 유지할 수 있는 이점을 얻을 수 있게 되고, 통수관(9b')(9c')은 연결나사부를 흡수실의 주벽과 배수실의 주벽에 천공한 나사구멍(2')(4')에 결합하고, 일측에 개폐밸브(9d')가 있어서 냉각수의 연결이 편리하고, 필요시에 냉각수의 공급을 중지시킬 수 있어 관리가 편리한 이점이 있다.In the present invention as described above, a rotary pulley (8) is attached to the outer end of the impeller rotation shaft (3a) protruding from the outer support of the shaft holder (5), and a cooling pipe body (9) is attached to the outer surface of the rotation shaft located between the rotary pulley and the shaft holder. ) is installed, and by connecting it with a belt and rotating it, the water pump operates. When the water pump operates, it is connected to the suction port (2b) of the suction chamber (2) and the discharge part of the discharge chamber (4). Since the water in the water pump is forced to circulate through the connected water pipes (9b') (9c') to the cooling water storage chamber (9a) of the cooling pipe body (9) covered on the outer surface of the rotating shaft (3a), the rotating shaft is cooled by the cooling pipe body. , Since the rotating shaft (3a) does not overheat, the lubricant injected into the shaft holder (5) does not overheat, so it can operate stably, and this prevents the expansion and leakage of the lubricant, thereby preventing waste of lubricant. It is possible to obtain the advantage of maintaining stable operation of the water pump by preventing wear of the bearings and retainers, and the connection threads of the water pipes (9b') (9c') are connected to the main wall of the absorption chamber and the main wall of the drain chamber. It is connected to the drilled screw holes (2') (4'), and has an on-off valve (9d') on one side, so it is convenient to connect the coolant, and the supply of coolant can be stopped when necessary, which has the advantage of convenient management. .

도 1은 본 발명의 전체적인 사시도
도 2는 도 1의 일부파절 단면도
도 3은 본 발명의 요부 확대 단면도
도 4는 도 3의 가-가'선단면도
도 5는 본 발명의 연결관 예시도이다.1 is an overall perspective view of the present invention
Figure 2 is a partial fracture cross-sectional view of Figure 1
Figure 3 is an enlarged cross-sectional view of the main part of the present invention
Figure 4 is a cross-sectional view taken along line A-A of Figure 3.
Figure 5 is an exemplary diagram of a connector of the present invention.

본 발명은 양수기 본체(1a) 내부에 형성한 흡수실(2)에 임펠라수용실(2a)을 형성하여 임펠라(3)를 장치하고, 임펠라수용실(2a) 외주에 흡수실과 구확되어 흡수한 물을 배출구(4a)로 배출하는 배출실(4)을 형성하며, 흡수구(2b)와 반대되는 쪽에 임펠라(3) 회전축(3a)을 지지하는 축잡이(5)를 부착하여 축잡이에 윤활유를 공급하는 주유기(5a)를 형성하고, 축잡이와 회전축 사이에 베어링(B1)(B2)을 장치하며, 임펠라와 회전축이 접속되는 위치에 매카니컬실(6)과 리테너(7)를 장치하고, 회전축 외측단에 회전풀리(8)를 장치하는 전동식 양수기(1)에 있어서, In the present invention, an impeller (3) is installed by forming an impeller receiving chamber (2a) in the absorption chamber (2) formed inside the water pump main body (1a), and the water absorbed is separated from the absorption chamber on the outer periphery of the impeller receiving chamber (2a). It forms a discharge chamber (4) that discharges water to the discharge port (4a), and a shaft handler (5) that supports the rotating shaft (3a) of the impeller (3) is attached to the side opposite to the absorption port (2b) to supply lubricating oil to the shaft handler. A lubricator (5a) is formed, bearings (B1) (B2) are installed between the shaft holder and the rotating shaft, and a mechanical seal (6) and retainer (7) are installed at the position where the impeller and the rotating shaft are connected, In the electric water pump (1) equipped with a rotating pulley (8) at the outer end of the rotating shaft,

축잡이(5) 외측지지부에서 회전풀리(8) 쪽으로 돌출되는 회전축(3a) 외주에 냉각관체(9)를 장치하여 내부에 냉각수수용실(9a)을 형성하고 냉각수수용실(9a)의 입구(9b)와, 배출구(9c)를 양수기의 흡수실(2)의 흡수부와 배출실(4)의 배출부에 통수관(9b')(9c')으로 연결하여 양수기의 물이 냉각수수용실로 강제 순환되게 하고, 냉각관체(9)와 회전축(3a)의 접속부에 리테너(7a)를 장치하여서 되는 구성이다.A cooling conduit body (9) is installed on the outer circumference of the rotating shaft (3a) protruding from the outer support of the shaft holder (5) toward the rotating pulley (8) to form a coolant receiving chamber (9a) inside, and the inlet of the coolant receiving chamber (9a) is ( 9b) and the outlet (9c) are connected to the absorption part of the absorption chamber (2) of the water pump and the discharge part of the discharge chamber (4) with water pipes (9b') (9c'), so that the water in the water pump is forced into the cooling water receiving chamber. This configuration is achieved by allowing circulation and installing a retainer (7a) at the connection between the cooling pipe body (9) and the rotating shaft (3a).

상기에서 냉각관체(9) 냉각수수용실(9a)을 형성하기 위해 냉각관체본체(9')에 덮개(9")가 구비되고, 냉각관체본체 외주에 체결구멍(9"')을 형성하여 회전축(3a)에 냉각관체를 끼우고, 축잡이(5) 외측면에 냉각관체본체와 덮개를 볼트(5b)로 체결하여 고정시키는 구성이며, 통수관(9b')(9c')은 양단부에 연결나사부(9d)(9e)를 형성하여 흡수실(2)과 배출실(4)의 주벽에 천공한 나사구멍(2')(4')에 나사결합하고, 일측에 개폐밸브(9d')를 갖추어서 되는 구성이다.In the above, a cover (9") is provided on the cooling pipe body (9') to form the coolant receiving chamber (9a) of the cooling pipe body (9), and a fastening hole (9"') is formed on the outer circumference of the cooling pipe body to form a rotating shaft. The cooling pipe body is inserted into (3a), and the cooling pipe body and cover are fixed to the outer surface of the shaft holder (5) by fastening them with bolts (5b), and the water pipes (9b') and (9c') are connected to both ends. Threaded portions 9d and 9e are formed and screwed into the screw holes 2' and 4' drilled in the main walls of the absorption chamber 2 and the discharge chamber 4, and an opening and closing valve 9d' is installed on one side. It is a configuration that can be completed.

1 : 양수기 1a : 양수기 본체
2 : 흡수실 2' : 나사구멍
2a : 임펠라수용실 2b : 흡수구 3 : 임펠라 3a : 임펠라회전축
4 : 배출실 4' : 나사구멍
4a : 배출구 5 : 축잡이
5a : 주유기 5b : 볼트
6 : 매카니컬실 7 : 리테너
7a : 리테너 8 : 회전풀리
9 : 냉각관체 9' : 냉각관체본체
9" : 덮개 9"' : 체결구멍
9a : 냉각수수용실 9b : 입구
9b',9c' : 통수관 9c : 배출구
9d,9e : 연결나사부 9d' : 개폐밸브1: Water pump 1a: Water pump main body
2: absorption chamber 2': screw hole
2a: Impeller receiving chamber 2b: Absorption port 3: Impeller 3a: Impeller rotation axis
4: discharge chamber 4': screw hole
4a: outlet 5: shaft holder
5a: Gas pump 5b: Bolt
6: Mechanical seal 7: Retainer
7a: Retainer 8: Rotating pulley
9: Cooling pipe body 9': Cooling pipe body
9": Cover 9"': Fastening hole
9a: Coolant storage room 9b: Inlet
9b', 9c': water pipe 9c: outlet
9d, 9e: Connection thread 9d': Open/close valve

Claims (3)

양수기 본체(1a) 내부에 형성한 흡수실(2)에 임펠라수용실(2a)을 형성하여 임펠라(3)를 장치하고, 임펠라수용실 외주에 흡수실과 구확되어 흡수한 물을 배출구(4a)로 배출하는 배출실(4)을 형성하며, 흡수구(2b)와 반대되는 쪽에 임펠라(3) 회전축(3a)을 지지하는 축잡이(5)를 부착하여 축잡이에 윤활유를 공급하는 주유기(5a)를 형성하고, 축잡이와 회전축 사이에 베어링(B1)(B2)을 장치하며, 임펠라와 회전축이 접속되는 위치에 매카니컬실(6)과 리테너(7)를 장치하고, 회전축 외측단에 회전풀리(8)를 장치하는 전동식 양수기(1)에 있어서,
축잡이(5) 외측지지부에서 회전풀리(8) 쪽으로 돌출되는 회전축(3a) 외주에 냉각관체(9)를 장치하여 내부에 냉각수수용실(9a)을 형성하고 냉각수수용실(9a)의 입구(9b)와, 배출구(9c)를 양수기의 흡수실(2)의 흡수부와 배출실(4)의 배출부에 통수관(9b')(9c')으로 연결하여 양수기의 물이 냉각수수용실로 강제 순환되게 하고, 냉각관체(9)와 회전축(3a)의 접속부에 리테너(7a)를 장치하고, 상기 냉각관체(9)는 냉각관체본체(9') 냉각수수용실(9a)을 형성하여 덮개(9")를 피복하고, 냉각관체본체 외주에 체결구멍(9"')을 형성하여 회전축(3a)에 냉각관체를 끼우고, 축잡이(5) 외측면에 냉각관체본체와 덮개를 볼트(5b)로 체결하여 고정시키며,
상기 통수관(9b')(9c')은 양단부에 연결나사부(9d)(9e)를 형성하여 흡수실(2)과 배출실(4)의 주벽에 천공한 나사구멍(2')(4')에 나사결합하고, 일측에 개폐밸브(9d')를 갖추어서 되는 양수기의 임펠라 회전축 냉각장치.The impeller (3) is installed by forming an impeller receiving chamber (2a) in the absorption chamber (2) formed inside the water pump main body (1a), and the absorption chamber is separated from the outer periphery of the impeller receiving chamber to drain the absorbed water through the outlet (4a). It forms a discharge chamber (4) for discharging, and a shaft holder (5) supporting the rotating shaft (3a) of the impeller (3) is attached to the side opposite to the suction port (2b) to provide a lubricator (5a) that supplies lubricating oil to the shaft holder. Formed, bearings (B1) (B2) are installed between the shaft holder and the rotating shaft, a mechanical seal (6) and a retainer (7) are installed at the position where the impeller and the rotating shaft are connected, and a rotating pulley is installed at the outer end of the rotating shaft. In the electric water pump (1) equipped with (8),
A cooling conduit body (9) is installed on the outer circumference of the rotating shaft (3a) protruding from the outer support of the shaft holder (5) toward the rotating pulley (8) to form a coolant receiving chamber (9a) inside, and the inlet of the coolant receiving chamber (9a) is ( 9b) and the outlet (9c) are connected to the absorption part of the absorption chamber (2) of the water pump and the discharge part of the discharge chamber (4) with water pipes (9b') (9c'), so that the water in the water pump is forced into the cooling water receiving chamber. Circulate, a retainer (7a) is installed at the connection between the cooling pipe body (9) and the rotating shaft (3a), and the cooling pipe body (9) forms a cooling water storage chamber (9a) of the cooling pipe body (9') and covers it. (9"), form a fastening hole (9"') on the outer circumference of the cooling pipe body, insert the cooling pipe body into the rotating shaft (3a), and attach the cooling pipe body and cover to the outer surface of the shaft holder (5) with bolts ( 5b) and secure it.
The water pipes (9b') (9c') have connecting threaded portions (9d) (9e) formed at both ends, and screw holes (2') (4') are drilled in the main walls of the absorption chamber (2) and the discharge chamber (4). ) and is equipped with an on-off valve (9d') on one side to cool the impeller rotating shaft of the water pump. 삭제delete 삭제delete
KR1020210133252A 2021-10-07 2021-10-07 The impella rotary shaft cooling device of the water pump KR102576224B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200316246Y1 (en) * 2003-03-10 2003-06-12 시종욱 The cooling device operate-shaft of water pump
KR200383655Y1 (en) * 2005-02-26 2005-05-06 시종욱 large water meter
KR200433323Y1 (en) 2006-09-25 2006-12-08 주식회사 신한알앤디 A waterproof-type motor pump for self-cooling
KR100973833B1 (en) * 2010-04-14 2010-08-03 (주)대한중전기 Double suction pump
JP2012072702A (en) 2010-09-28 2012-04-12 Honda Motor Co Ltd Centrifugal pump unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200316246Y1 (en) * 2003-03-10 2003-06-12 시종욱 The cooling device operate-shaft of water pump
KR200383655Y1 (en) * 2005-02-26 2005-05-06 시종욱 large water meter
KR200433323Y1 (en) 2006-09-25 2006-12-08 주식회사 신한알앤디 A waterproof-type motor pump for self-cooling
KR100973833B1 (en) * 2010-04-14 2010-08-03 (주)대한중전기 Double suction pump
JP2012072702A (en) 2010-09-28 2012-04-12 Honda Motor Co Ltd Centrifugal pump unit

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