KR20040035632A - A centrifugal pump - Google Patents

A centrifugal pump Download PDF

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Publication number
KR20040035632A
KR20040035632A KR1020040022750A KR20040022750A KR20040035632A KR 20040035632 A KR20040035632 A KR 20040035632A KR 1020040022750 A KR1020040022750 A KR 1020040022750A KR 20040022750 A KR20040022750 A KR 20040022750A KR 20040035632 A KR20040035632 A KR 20040035632A
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South Korea
Prior art keywords
impeller
pressure
casing
centrifugal pump
pipe path
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KR1020040022750A
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Korean (ko)
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KR100545834B1 (en
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김일상
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김일상
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Priority to KR1020040022750A priority Critical patent/KR100545834B1/en
Publication of KR20040035632A publication Critical patent/KR20040035632A/en
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Publication of KR100545834B1 publication Critical patent/KR100545834B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L8/00—Electric propulsion with power supply from forces of nature, e.g. sun or wind
    • B60L8/006—Converting flow of air into electric energy, e.g. by using wind turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K16/00—Arrangements in connection with power supply of propulsion units in vehicles from forces of nature, e.g. sun or wind
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K16/00—Arrangements in connection with power supply of propulsion units in vehicles from forces of nature, e.g. sun or wind
    • B60K2016/006—Arrangements in connection with power supply of propulsion units in vehicles from forces of nature, e.g. sun or wind wind power driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10—Combinations of wind motors with apparatus storing energy
    • F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/30—Wind motors specially adapted for installation in particular locations
    • F03D9/32—Wind motors specially adapted for installation in particular locations on moving objects, e.g. vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/90—Energy harvesting concepts as power supply for auxiliaries' energy consumption, e.g. photovoltaic sun-roof

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE: A centrifugal pump is provided to exhaust a great amount of water with high pressure and to improve a speed of a fluid by allowing the fluid to pass through an impeller without increasing a space part of the impeller installed within a casing. CONSTITUTION: A centrifugal pump includes a first impeller(5) installed in the inside of a casing(3) having an intake pipe path(1) and a spray pipe path(2). The first impeller(5) is rotated by a first motor. A second impeller(7) is inserted while rotating in a direction opposite to a rotation direction of the first impeller(7). The intake pipe path(1) and the spray pipe path(2) are formed in parallel to each other such that the intake pipe path(1) and the spray pipe path(2) are separated from each other in one side of the casing(3). A perforated hole(9) is formed in the separating part. When pressure within the intake pipe path is lower than that of the spray pipe path(2) by a predetermined pressure, the perforated hole(9) is opened through a check valve(10).

Description

원심펌프{A centrifugal pump}Centrifugal pump

본 발명은 원심력을 이용하여 액체나 기체를 흡입, 펌핑하는 원심펌프에 관한 것으로서, 더욱 상세하게는 펌프의 흡입력 및 토출력을 극대화 할 수 있도록 제1임펠러의 외측으로 제1임펠러와 역방향으로 회전하는 제2임펠러를 외삽하여 임펠러를 이중으로 구성하고, 제2임펠러축 부위의 누설 및 그에 따른 압력손실을 방지하도록 제2임펠러의 배면 중심부에 다수개의 역압완화깃을 일정 간격을 두고 환상으로 부설하며, 흡입구나 토출구 부위의 갑작스런 막힘시에도 펌프를 보호할 수 있도록 흡입관로와 토출관로를 케이싱의 일측에 상호 구획되도록 나란하게 형성하고 그 구획부에는 통공을 형성하되 흡입관로 내측의 압력이 토출관로 내측의 압력에 비해 소정 정도 낮을 때 상기 통공을 개방시키는 체크밸브를 구비한 원심펌프에 관한 것이다.The present invention relates to a centrifugal pump that sucks or pumps a liquid or gas by using a centrifugal force, and more specifically, rotates in a reverse direction with the first impeller to the outside of the first impeller so as to maximize suction power and earth output of the pump. The impeller is doubled by extrapolating the second impeller, and a plurality of back pressure relaxation targets are annularly placed at the center of the back of the second impeller at regular intervals to prevent the leakage of the second impeller shaft portion and the resulting pressure loss. The suction pipe and discharge pipe are formed side by side so as to be mutually partitioned on one side of the casing so that the pump can be protected even when the suction or discharge port is suddenly clogged. The present invention relates to a centrifugal pump having a check valve that opens the through hole when the pressure is a predetermined level lower than the pressure.

일반적으로, 원심펌프는 밀폐된 케이싱 내에서 임펠러를 회전시킴으로써 발생하는 원심력을 이용하여 유체의 펌핑작용, 즉 수송작용을 하거나 압력을 발생시키는 펌프로서, 케이싱의 흡입구를 통해 임펠러의 중심부로 유입된 유체가 회전하는 임펠러의 원심력에 의해 임펠러의 바깥쪽으로 나오게 되면 임펠러 중심부의 압력이 저하되어 진공에 가까워지므로 흡수관의 유체가 대기의 압력에 의해 임펠러의 중심을 향해 흐르게 되고 임펠러의 바깥쪽으로 나온 유체는 케이싱의 토출관을 거쳐 토출구를 통해 외부로 배출되게 되며 이에 따라 유체가 연속적으로 흡상, 압상되어 펌핑이 되도록 한 것이다.In general, a centrifugal pump is a pump that pumps fluid, that is, transports or generates pressure by using centrifugal force generated by rotating an impeller in a closed casing. The fluid flows into the center of the impeller through the inlet of the casing. When the pressure comes out of the impeller due to the centrifugal force of the rotating impeller, the pressure in the center of the impeller decreases and becomes close to the vacuum. Therefore, the fluid in the absorption tube flows toward the center of the impeller under atmospheric pressure, and the fluid exiting the impeller flows out of the casing. It is discharged to the outside through the discharge port through the discharge pipe of the fluid is continuously sucked, pressed to be pumped.

이와 같은 구조의 원심 펌프는 고속 회전이 가능하고, 소형 경량이며, 구조가 간단하고, 취급이 용이하여 배수용, 상하수도용, 화학공업용, 가정용 등 광범위하게 사용되고 있다.The centrifugal pump having such a structure can be rotated at high speed, is small in size, light weight, simple in structure, and easy to handle, and is widely used for drainage, water and sewage, chemical industry, and household use.

그러나, 이러한 원심펌프도 임펠러의 바깥쪽으로 이동된 유체 자체가 임펠러의 중심부에서 바깥쪽으로 이동하려는 유체에 역압으로 작용하게 되므로 그 토출압과 토출량에 한계가 있기 마련이며, 이와 같은 토출압과 토출량의 한계는 임펠러의 회전속도를 높임으로써 임펠러를 통과하는 유체의 속도와 압력을 증가시킴에 의해 어느 정도 보완이 되나 기계적으로 임펠러의 회전속도를 증대시키는 것 역시 일정 한계가 있기 마련이다.However, such a centrifugal pump also has a limitation in the discharge pressure and the discharge amount because the fluid itself moved outward of the impeller acts as a back pressure on the fluid to move outward from the center of the impeller. Is compensated to some extent by increasing the speed and pressure of the fluid passing through the impeller by increasing the rotation speed of the impeller, but mechanically increasing the rotation speed of the impeller also has a certain limit.

그리고, 종래의 원심펌프에 있어서는 임펠러의 바깥쪽 와류실로부터의 유체의 역압이 임펠러와 케이싱간의 간격부를 통해 임펠러축 부위로 용이하게 전달되게 되어 임펠러축과 케이싱과의 밀봉부위에서 누설이 발생하게 되는 문제점이 있다.In the conventional centrifugal pump, the back pressure of the fluid from the outer vortex chamber of the impeller is easily transmitted to the impeller shaft portion through the gap between the impeller and the casing, and leakage occurs at the sealed portion between the impeller shaft and the casing. There is a problem.

또한, 종래에는 펌프의 흡입구 또는 토출구와 연통된 연결관로의 외부적 요인에 의한 찌그러짐, 상기 연결관로상에 설치되는 밸브의 잠금 등에 의해 연결관로의 단면적이 감소되거나 연결관로가 막히게 된 경우에, 흡입관로내에 발생되는 급격한 부압이나 토출관로상에서 유체의 운동에너지가 압력으로 전환함으로써 발생하는 수격작용 등에 의해 펌프가 손상되게 되는 것을 방지하도록 흡입구의 전단부 또는 토출구의 후단부 연결관로상에 별도의 체크밸브를 설치하여 왔으나 이와 같이 별도의 체크밸브를 연결관로상에 설치함에는 비용도 많이 들 뿐더러 부가적인 설치면적이 소요된다는 문제점이 있다.Further, conventionally, when the cross-sectional area of the connection pipe is reduced or the connection pipe is blocked by crushing caused by external factors of the connection pipe communicating with the suction or discharge port of the pump, the locking of the valve installed on the connection pipe, the suction pipe is blocked. Separate check valve on the inlet line of the inlet port or the rear end of the outlet port to prevent the pump from being damaged by the sudden negative pressure generated in the furnace or the water hammer effect caused by the conversion of the kinetic energy of the fluid to the pressure in the discharge line. Although it has been installed to install a separate check valve on the connection line in this way is expensive and there is a problem that additional installation area is required.

본 발명은 상기의 문제점을 감안하여 안출된 것으로, 본 발명의 제1목적은 케이싱내 임펠러가 차지하는 공간부의 큰 증대 없이도 유체가 임펠러를 통과하는 동안 종래에 비해 한층 가압, 가속될 수 있도록 함으로써 보다 높은 토출압과 토출량을 얻을 수 있는 원심펌프를 제공함에 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first object of the present invention is to allow the fluid to be further pressurized and accelerated while the fluid passes through the impeller without a large increase in the space taken up by the impeller in the casing. The present invention provides a centrifugal pump capable of obtaining a discharge pressure and a discharge amount.

본 발명의 제2목적은 임펠러의 바깥쪽 와류실 또는 토출관로로부터의 유체의 역압이 임펠러와 케이싱간의 간격부를 통해 임펠러축 부위로 전달되는 것을 완화시킴으로써 임펠러축과 케이싱과의 밀봉부위에서의 누설을 방지할 수 있도록 한 원심펌프를 제공하는 것이다.The second object of the present invention is to reduce leakage of the impeller shaft and the casing by mitigating transfer of back pressure of fluid from the outer vortex chamber or discharge conduit of the impeller to the impeller shaft portion through the gap between the impeller and the casing. It is to provide a centrifugal pump to prevent it.

본 발명의 제3목적은 흡입구 또는 토출구 부위의 갑작스런 막힘시에도 자동적으로 흡입관로의 내측과 토출관로의 내측간의 압력차를 해소시킬 수 있도록 함으로써 펌프를 보호할 수 있도록 한 원심펌프를 제공하는 것이다.It is a third object of the present invention to provide a centrifugal pump that can protect a pump by automatically relieving a pressure difference between an inside of a suction line and an inside of a discharge line even in the event of sudden clogging of a suction or discharge port.

도 1은 본 발명의 종단면도1 is a longitudinal cross-sectional view of the present invention;

도 2는 본 발명의 제1ㆍ2임펠러의 분해 사시도2 is an exploded perspective view of the first and second impellers of the present invention;

도 3은 본 발명의 제1ㆍ2임펠러부의 작동 상태 단면도Figure 3 is a cross-sectional view of the operating state of the first and second impeller portion of the present invention

< 도면의 주요부분에 대한 부호의 설명 ><Description of Symbols for Major Parts of Drawings>

1 : 흡입관로 1a : 흡입구 2: 토출관로1: suction line 1a: suction port 2: discharge line

2a : 토출구 3 : 케이싱 4 : 제1모터2a: discharge port 3: casing 4: first motor

5 : 제1임펠러 5a : 제1임펠러날개 6 : 제2모터5: first impeller 5a: first impeller wing 6: second motor

7 : 제2임펠러 7a : 제2임펠러날개 8 : 역압완화깃7: 2nd impeller 7a: 2nd impeller wing 8: Back pressure loosening feather

9 : 통공 10 : 체크밸브 10a : 스프링9 through hole 10 check valve 10a spring

10b : 플러그 10c : 조절구 10d : 단자10b: Plug 10c: Control port 10d: Terminal

11 : 안내깃11: guide feather

이하, 상기의 목적을 달성하기 위한 본 발명의 구성 및 작용효과를 첨부도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, the configuration and operation of the present invention for achieving the above object will be described in detail.

도 1은 본 발명의 종단면도이고, 도 2는 본 발명의 제1ㆍ2임펠러의 분해 사시도이며, 도 3은 본 발명의 제1ㆍ2임펠러부의 작동 상태 단면도로서,1 is a longitudinal cross-sectional view of the present invention, Figure 2 is an exploded perspective view of the first and second impeller of the present invention, Figure 3 is a cross-sectional view of the operating state of the first and second impeller of the present invention,

본 발명은 원심펌프에 있어서, 흡입관로(1)와 토출관로(2)가 형성된 케이싱(3)의 내측에 외부의 제1모터(4)에 의해 회전되는 제1임펠러(5)가 장착되고, 상기 제1임펠러(5)의 배면부와 외측 둘레로 상기 제1임펠러(5)보다 큰 직경을 갖고제1임펠러(5)와 동일선상의 축심을 가지며 외부의 제2모터(6)에 의해 상기 제1임펠러(5)와 역방향으로 회전되는 제2임펠러(7)가 외삽됨을 특징으로 한다.In the present invention, in the centrifugal pump, a first impeller (5) rotated by an external first motor (4) is mounted inside the casing (3) where the suction pipe passage (1) and the discharge pipe passage (2) are formed, The first impeller 5 has a larger diameter than the first impeller 5 around the rear portion and the outer periphery of the first impeller 5, has the same axis as the first impeller 5, and is formed by an external second motor 6. The first impeller 5 and the second impeller 7 which is rotated in the reverse direction is characterized in that it is extrapolated.

그리고, 상기 제2임펠러(7)의 배면 중심부에는 다수개의 역압완화깃(8)이 방사상으로 부설됨을 특징으로 한다.In addition, a plurality of back pressure relief blades 8 are radially placed at the center of the rear surface of the second impeller 7.

또한, 상기 흡입관로(1)와 토출관로(2)는 케이싱(3)의 일측에 상호 구획되도록 나란하게 형성되고, 그 구획부에는 통공(9)이 형성되며, 흡입관로(1)내 압력이 토출관로(2)내 압력에 비해 소정 정도 낮을 때 상기 통공(9)을 개방시키는 체크밸브(10)가 구비됨을 특징으로 한다.In addition, the suction pipe passage 1 and the discharge pipe passage 2 are formed side by side so as to be mutually partitioned on one side of the casing (3), a through hole (9) is formed in the partition portion, the pressure in the suction pipe passage (1) It is characterized in that the check valve 10 for opening the through hole (9) when the predetermined degree lower than the pressure in the discharge pipe (2) is provided.

먼저, 본 발명의 원심펌프는 케이싱(3)의 내측에 외부의 제1모터(4)에 의해 회전되는 제1임펠러(5)가 장착되고, 상기 제1임펠러(5)의 배면부와 외측 둘레로 상기 제1임펠러(5)보다 큰 직경을 갖고 제1임펠러(5)와 동일선상의 축심을 가지며 외부의 제2모터(6)에 의해 상기 제1임펠러(5)와 역방향으로 회전되는 제2임펠러(7)가 외삽되는 구조를 갖는다. 즉, 제1임펠러(5)의 날개(5a) 외측에 제2임펠러(7)의 날개(7a)가 위치되도록 제1임펠러(5)와 제2임펠러(7)가 상호 회전가능하게 포개지는 것과 같은 구조이다. 따라서, 제1 및 제2 두 개의 임펠러(5)(7)가 구비되더라도 상기 제1 및 제2 임펠러(5)(7)가 케이싱(3)내에서 차지하는 공간은 하나의 임펠러가 구비된 경우와 별반 차이가 없게 되므로 펌프의 부피가 거의 증가하지 않게 된다.First, the centrifugal pump of the present invention is equipped with a first impeller 5 which is rotated by an external first motor 4 inside the casing 3, and is formed around the rear portion and the outer circumference of the first impeller 5. The second impeller having a larger diameter than the first impeller 5 and having the same axis as the first impeller 5 and being rotated in the opposite direction to the first impeller 5 by an external second motor 6. (7) has an extrapolated structure. That is, the first impeller 5 and the second impeller 7 are rotatably stacked so that the wings 7a of the second impeller 7 are positioned outside the wings 5a of the first impeller 5. It is the same structure. Therefore, even if the first and second two impellers 5 and 7 are provided, the space occupied by the first and second impellers 5 and 7 in the casing 3 is equal to that of one impeller. Since there is no difference, the volume of the pump is hardly increased.

흡입구(1a)를 통해 흡입된 유체는 흡입관로(1)를 거쳐 제1모터(4)에 의해 회전되는 상기 제1임펠러(5)의 중심부로 흡입된 후 그 원심력에 의해 제1임펠러(5)의 날개(5a)가 형성하는 유로를 따라 반경방향으로 빠른 속도로 이동하면서 1차적으로가압되게 된다.The fluid sucked through the suction port 1a is sucked into the center of the first impeller 5 which is rotated by the first motor 4 via the suction pipe path 1 and then the first impeller 5 by the centrifugal force thereof. It is primarily pressurized while moving at a high speed in the radial direction along the flow path formed by the blade 5a.

이렇게 1차 가압되어 빠른 속도로 제1임펠러(5)의 외측으로 빠져 나오는 유체는 제1임펠러(5)의 외측으로 빠져나오는 순간 상기 제1임펠러(5)의 회전방향과 역방향으로 회전하는 제2임펠러(7)의 날개(7a)에 충격되면서 가속되어지는 동시에 상기 제2임펠러(7)의 회전원심력에 의해 제2임펠러날개(7a)가 형성하는 유로를 통과하면서 다시 한번 가압되게 된다.The first pressurized fluid flowing out of the first impeller 5 at a high speed is rotated in a direction opposite to the rotational direction of the first impeller 5 at the moment of exiting the first impeller 5. It is accelerated while being impacted by the blade 7a of the impeller 7, and is pressed once again while passing through the flow path formed by the second impeller wing 7a by the rotational centrifugal force of the second impeller 7.

제2임펠러(7)를 통과하여 빠져나온 유체는 제2임펠러(7)의 연부 외측에서 케이싱(3)에 형성되어지는 안내깃(11)에 의해 한번 더 가압되면서 토출관(2)으로 안내되어 토출구(2a)를 통해 배출되게 된다. 즉, 펌프에 흡입된 유체가 제1임펠러(5)를 통과하면서 가압된 후 상기 제2임펠러(7)에 의해 가속됨과 동시에 다시 하번 가압되게 되므로 종래의 펌프에 비해, 임펠러(5)(7)를 통과한 유체가 한층 높은 에너지를 갖게 되고, 이에 따라 펌프가 보다 높은 토출압과 토출량을 가질 수 있게 되는 것이다.The fluid that has passed through the second impeller 7 is guided to the discharge pipe 2 while being pressed once more by the guide vane 11 formed on the casing 3 outside the edge of the second impeller 7. It is discharged through the discharge port 2a. That is, since the fluid sucked in the pump is pressurized while passing through the first impeller 5 and then accelerated by the second impeller 7 and pressurized again, the impeller 5, 7. The fluid passing through will have a higher energy, thereby allowing the pump to have a higher discharge pressure and discharge amount.

여기서, 상기 제1임펠러(5) 및 제2임펠러(7)의 회전속도를 적절히 조절함에 의해 토출량 또는 토출압의 정밀한 조절이 이루어질 수 있게 된다.Here, by properly adjusting the rotational speed of the first impeller 5 and the second impeller 7 it is possible to precisely control the discharge amount or discharge pressure.

상기 제2임펠러(7)의 배면 중심부에는 다수개의 역압완화깃(8)이 방사상으로 부설되어지는 것이 바람직한데, 이는 토출관로(2)상에 채워진 유체로부터의 역압이 제2임펠러(7)와 케이싱(3) 내측면간의 간격부를 통해 제1임펠러(7)의 중심부로 작용할 때, 제2임펠러(7)의 회전에 따라 제2임펠러(7)의 중심부와 케이싱(3)의 내측면간의 간격부에 채워져 있던 유체에 작용하는 원심력이 상기 토출관로(2)상에 채워진 유체로부터의 역압을 소정 정도 상쇄시키도록 함으로써 제2임펠러(7)의 축과 케이싱(3)간의 밀봉부위에서의 누설 및 그에 따른 압력손실을 방지하도록 하기 위함이다. 특히, 본 발명의 원심펌프는 종래의 원심펌프에 비해 제1임펠러(7)를 통과해 나오는 유체의 압력이 상당히 큰만큼 토출관로(2)로부터의 역압도 크게 작용하므로 이러한 큰 역압으로부터 제2임펠러(7)의 축과 케이싱(3)간의 밀봉부위를 보호하기 위해서는 상기 역압완화깃(8)을 부설하는 것이 바람직하다.It is preferable that a plurality of back pressure relaxing feathers 8 are radially laid at the center of the rear surface of the second impeller 7, and the back pressure from the fluid filled on the discharge conduit 2 and the second impeller 7 When acting as the center of the first impeller 7 through the gap between the inner surface of the casing 3, the gap between the center of the second impeller 7 and the inner surface of the casing 3 as the second impeller 7 rotates. The centrifugal force acting on the fluid filled in the part cancels the back pressure from the fluid filled on the discharge pipe 2 to a certain degree so that leakage from the sealing portion between the shaft of the second impeller 7 and the casing 3 and This is to prevent the pressure loss accordingly. In particular, the centrifugal pump of the present invention has a large pressure of the fluid passing through the first impeller 7 as compared with the conventional centrifugal pump, so that the back pressure from the discharge conduit 2 also acts as large, so that the second impeller from such a large back pressure In order to protect the sealing part between the shaft of (7) and the casing 3, it is preferable to provide the said back pressure relaxation feather 8 above.

여기서, 상기 역압완화깃(8)은 제2임펠러(7)의 회전저항을 증가시키기 않도록 상기 제2임펠러(7)의 전면에 구비된 제2임펠러날개(7a)와 동일한 방향으로 만곡되어져야 함은 물론이다.Here, the reverse pressure relaxation blade 8 should be curved in the same direction as the second impeller wing (7a) provided on the front surface of the second impeller (7) so as not to increase the rotational resistance of the second impeller (7). Of course.

한편, 상기 흡입관로(1)와 토출관로(2)는 케이싱(3)의 일측에 상호 구획되도록 나란하게 형성되고, 그 구획부에는 통공(9)이 형성되며, 흡입관로(1)내 압력이 토출관로(2)내 압력에 비해 소정 정도 낮을 때 상기 통공(9)을 개방시키는 체크밸브(10)가 구비됨으로써, 흡입관로(1)내 급격한 부압의 발생이나 토출관로(2)상에서의 수격현상을 방지토록 함으로써 펌프를 보호할 수 있도록 되어 있다.On the other hand, the suction pipe 1 and the discharge pipe (2) is formed side by side so as to be mutually partitioned on one side of the casing (3), a through hole (9) is formed in the partition portion, the pressure in the suction pipe passage (1) When a check valve 10 is provided to open the through hole 9 when the pressure in the discharge pipe 2 is lower than a predetermined pressure, a sudden negative pressure is generated in the suction pipe 1 or water hammer occurs on the discharge pipe 2. The pump can be protected by preventing it.

펌프의 작동중에 흡입구(1a)의 전단 또는 토출구(2a)의 후단과 연통된 연결관로상에 설치된 외부 밸브가 외부적 요인에 의한 찌그러짐에 의해 그 단면적이 갑작스럽게 감소되거나 연결관로상에 설치되는 외부 밸브의 잠금 등에 의해 갑작스럽게 막히게 되는 수가 있는데, 흡입구(1a)의 전단이 막히게 되는 경우에는 흡입관로(1)내에 급격한 부압이 발생함으로써 펌프에 손상을 줄 수 있게 되고, 특히, 토출구(2a)의 후단이 막히게 되는 경우에는 토출관로(2)에서의 유체의 운동에너지가 압력으로 전환함으로써 발생하는 수격현상이 나타나게 되어 펌프에 손상을 줄 수 있게 된다.During operation of the pump, the external valve installed on the connecting pipe communicating with the front end of the inlet port 1a or the rear end of the outlet port 2a suddenly reduces its cross-sectional area due to crushing due to external factors or the external valve installed on the connecting pipe line. If the front end of the inlet port 1a is blocked due to the locking of the valve or the like, a sudden negative pressure is generated in the inlet line 1, which may damage the pump. In particular, the discharge port 2a In the case where the rear end is blocked, the water hammer phenomenon generated by converting the kinetic energy of the fluid in the discharge pipe 2 into the pressure appears, which may damage the pump.

여기서, 흡입구(1a)의 전단부가 막히는 경우와 토출구(2a)의 후단부가 막히는 경우 모두 흡입관로(1) 내의 압력이 토출관로(2) 내의 압력에 비해 낮아지게 되는데, 그 압력차가 상기 체크밸브(10)의 스프링(10a)의 탄지력을 능가하게 되면 체크밸브(10)의 플러그(10b)가 흡입관로(1)측으로 당겨지면서 통공(9)을 열게 되어 흡입관로(1)와 토출관로(2)를 개로시킴에 의해 흡입관로(1)와 토출관로(2) 내측의 압력차를 해소하게 됨으로써, 흡입관로(1)내 급격한 부압의 발생이나 토출관로(2)상에서의 수격현상을 방지하게 되어 펌프를 보호할 수 있게 되는 것이다.Here, in the case where the front end of the suction port 1a is blocked and the rear end of the discharge port 2a is blocked, the pressure in the suction pipe passage 1 becomes lower than the pressure in the discharge pipe passage 2, and the pressure difference is the check valve ( When the force of the spring 10a of 10 is exceeded, the plug 10b of the check valve 10 is pulled toward the suction pipe passage 1 to open the through-hole 9, so that the suction pipe passage 1 and the discharge passage 2 The pressure difference between the suction pipe 1 and the discharge pipe 2 is eliminated by opening the c), thereby preventing sudden occurrence of negative pressure in the suction pipe 1 or water hammer on the discharge pipe 2. It will be able to protect the pump.

또한, 이와 같이 본 발명의 원심펌프에는 펌프 자체에 체크밸브(10)가 구비되게 되므로 종래와 같이 흡입구(1a) 또는 토출구(2a)와 연통되는 연결관로상에 별도로 체크밸브를 구비할 필요가 없게 되어 펌프의 설치면적을 감소시킬 수 있게 되는 것이다.In addition, since the centrifugal pump of the present invention is provided with a check valve 10 in the pump itself, there is no need to provide a separate check valve on the connection passage communicating with the inlet port 1a or the outlet port 2a as in the prior art. Thus, the installation area of the pump can be reduced.

한편, 상기 체크밸브(10)에는 스프링(10a)의 탄지력을 조절할 수 있는 조절구(10c)를 구비함으로써, 플러그(10b)가 통공(9)을 개방시키도록 당겨지는 토출관로(2)와 흡입관로(1)간의 압력차를 적절히 조절할 수 있도록 하며, 플러그(10b)가 소정 간격 이동될 때 상호 접하게 되는 단자(10d)를 구비함으로써 경보음을 발생케 할 수도 있다.On the other hand, the check valve (10) is provided with an adjustment opening (10c) for adjusting the holding force of the spring (10a), the discharge pipe passage (2) and the plug 10b is pulled to open the through hole (9) and It is possible to appropriately adjust the pressure difference between the suction pipe (1), it is also possible to generate an alarm sound by having a terminal (10d) which is in contact with each other when the plug (10b) is moved a predetermined interval.

이와 같이 본 발명의 원심펌프는 케이싱내 임펠러가 차지하는 공간부의 큰 증대 없이도 종래에 비해 유체가 한층 더 가압, 가속됨으로써 보다 토출압과 토출량을 극대화 할 수 있도록 하는 한편, 역압완화깃의 부설로 임펠러축과 케이싱과의 밀봉부위에서의 누설을 방지하고, 자체 체크밸브의 구비로 흡입구 또는 토출구 부위의 갑작스런 막힘시에도 자동적으로 흡입관과 토출관과의 압력차를 해소시킬 수 있도록 하여 결과적으로 펌프를 보호할 수 있도록 한 유용한 효과가 있다.As described above, the centrifugal pump of the present invention allows the fluid to be further pressurized and accelerated compared to the prior art without a large increase in the space occupied by the impeller in the casing, thereby maximizing the discharge pressure and the discharge amount, and the impeller shaft due to the laying of the back pressure relief blade. It is possible to prevent leakage at the sealing part between the casing and the casing, and to provide a self-check valve to automatically relieve the pressure difference between the suction pipe and the discharge pipe even in the event of sudden blockage of the suction or discharge port. It has one useful effect.

Claims (3)

원심펌프에 있어서, 흡입관로(1)와 토출관로(2)가 형성된 케이싱(3)의 내측에 외부의 제1모터(4)에 의해 회전되는 제1임펠러(5)가 장착되고, 상기 제1임펠러(5)의 배면부와 외측 둘레로 상기 제1임펠러(5)보다 큰 직경을 갖고 제1임펠러(5)와 동일선상의 축심을 가지며 외부의 제2모터(6)에 의해 상기 제1임펠러(5)와 역방향으로 회전되는 제2임펠러(7)가 외삽됨을 특징으로 하는 원심펌프.In the centrifugal pump, a first impeller (5) rotated by an external first motor (4) is mounted inside the casing (3) in which the suction pipe path (1) and the discharge pipe path (2) are formed, and the first The first impeller (2) has a larger diameter than the first impeller (5) around the rear portion and the outer periphery of the impeller (5), has the same axis as the first impeller (5), and is provided by an external second motor (6). Centrifugal pump, characterized in that the second impeller (7) which is rotated in the opposite direction to 5) is extrapolated. 제1항에 있어서, 상기 제2임펠러(7)의 배면 중심부에는 다수개의 역압완화깃(8)이 방사상으로 부설됨을 특징으로 하는 원심펌프.The centrifugal pump according to claim 1, characterized in that a plurality of back pressure relief blades (8) are radially placed at the rear center of the second impeller (7). 제1항에 있어서, 상기 흡입관로(1)와 토출관로(2)는 케이싱(3)의 일측에 상호 구획되도록 나란하게 형성되고, 그 구획부에는 통공(9)이 형성되며, 흡입관로(1)내 압력이 토출관로(2)내 압력에 비해 소정 정도 낮을 때 상기 통공(9)을 개방시키는 체크밸브(10)가 구비됨을 특징으로 하는 원심펌프.According to claim 1, wherein the suction pipe line 1 and the discharge pipe line 2 is formed side by side so as to be mutually partitioned on one side of the casing (3), the through portion 9 is formed in the partition portion, the suction pipe passage (1) Centrifugal pump, characterized in that the check valve (10) is provided to open the through hole (9) when the pressure in the discharge pipe passage is lower than the pressure in the discharge passage (2).
KR1020040022750A 2004-04-02 2004-04-02 A centrifugal pump KR100545834B1 (en)

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US11536287B2 (en) 2017-12-04 2022-12-27 Hanwha Power Systems Co., Ltd Dual impeller

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