KR101129408B1 - Anti-resonance system for large vertical pump - Google Patents

Anti-resonance system for large vertical pump Download PDF

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KR101129408B1
KR101129408B1 KR1020090076522A KR20090076522A KR101129408B1 KR 101129408 B1 KR101129408 B1 KR 101129408B1 KR 1020090076522 A KR1020090076522 A KR 1020090076522A KR 20090076522 A KR20090076522 A KR 20090076522A KR 101129408 B1 KR101129408 B1 KR 101129408B1
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pump
shaft
resonance
large vertical
vertical
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KR1020090076522A
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Korean (ko)
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KR20110019001A (en
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배춘희
김연환
구재량
최효상
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한국전력공사
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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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • 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
    • F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • 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
    • 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
    • F05D2240/00—Components
    • F05D2240/50—Bearings
    • 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
    • F05D2260/00—Function
    • F05D2260/96—Preventing, counteracting or reducing vibration or noise
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

본 발명은 발전소 및 석유화학플랜트의 대형수직펌프의 회전축에서 발생하는 회전깃수 공진을 해소하여 펌프 축의 과도한 진동발생 요인을 제거하는 대형수직펌프용 회전깃수 공진해소 시스템에 관한 것이다. 종래에는, 대형수직펌프 케이싱 공진을 해소하기 위하여 펌프에 동흡진기를 설치하거나 펌프의 강성을 증감시켜 왔으며, 펌프 축 진동을 해소하기 위하여 발란싱(balancing)이나 축정렬을 수행한다. 그러나, 수직펌프 회전축이 펌프 회전깃수 진동 주파수와 공진을 일으키게 되면, 회전축에 과도한 진동이 발생하여 회전축을 손상시키므로 수직펌프의 안정적 관리에 어려움이 있어 왔다. 이러한 관계로 수직펌프 회전축의 회전깃수 공진을 해소할 수 있는 시스템의 설계는 필연적일 수 밖에는 없다.The present invention relates to a rotating blade resonance cancellation system for large vertical pumps that eliminates excessive vibration generation factors of the pump shaft by solving the rotating blade resonance occurring in the rotary shaft of the large vertical pump of the power plant and petrochemical plant. Conventionally, in order to eliminate large vertical pump casing resonance, a copper reducer is installed in the pump or the rigidity of the pump has been increased or decreased. In order to solve the pump shaft vibration, balancing or shaft alignment is performed. However, when the vertical pump rotation shaft causes resonance with the oscillation frequency of the pump rotation number, excessive vibration occurs in the rotation shaft to damage the rotation shaft, which makes it difficult to stably manage the vertical pump. In this regard, the design of a system that can eliminate the rotational head resonance of the vertical pump rotation axis is inevitable.

본 발명은 전술된 단점을 극복하기 위해서 4개의 저널 베어링, 2개의 커플링, 및 1개의 임펠러를 구비한 회전축을 해수계통 대형수직펌프에 설치하여 펌프 회전깃수 공진을 해소함으로써 펌프 축에 발생하는 과도한 진동을 저감시키는 대형수직펌프용 공진해소 시스템으로, 이를 수직펌프에 설치시, 회전축 회전깃수 공진이 해소되고 펌프 축 진동이 90% 이상 저감되어 해수계통 대형수직펌프의 안정성에 크게 기여할 수 있다.In order to overcome the above-mentioned disadvantages, the present invention installs a rotating shaft having four journal bearings, two couplings, and one impeller in a large seawater system vertical vertical pump to solve the pump rotation head resonance, thereby causing excessive pump shafts. It is a resonance canceling system for large vertical pumps to reduce vibration. When it is installed in a vertical pump, the rotation shaft rotation number resonance is eliminated and the pump shaft vibration is reduced by 90% or more, which can greatly contribute to the stability of the large vertical water pump.

Description

대형수직펌프용 공진해소 시스템 {Anti-resonance system for large vertical pump}Resonance cancellation system for large vertical pumps {Anti-resonance system for large vertical pump}

본 발명은 대형수직펌프에서 발생하는 진동을 저감시키는 공진해소 시스템에 관한 것이다.The present invention relates to a resonance cancellation system for reducing vibration generated in a large vertical pump.

통상적으로, 발전소는 저수지 등에서 공급된 용수를 수처리를 통해 순수로 만들고, 보일러에서 가열한 후 고온고압 증기를 만들어 터빈을 회전시켜 전기를 생산하고 있으며, 터빈에서 일을 하고 난 증기를 간접냉각을 통해 다시 가열하여 사용하는 폐회로 시스템을 사용하고 있다. 터빈에서 일을 하고 난 증기를 간접냉각시키기 위해 복수기가 사용되는데 간접냉각수로 바닷물이 사용되고 있다. 즉 터빈에서 낙하하는 물 사이에 튜브를 통해 바닷물을 통과시켜 증기를 냉각시키고 있다. 따라서, 간접냉각수로 사용되는 바닷물을 공급하는 해수계통 대형수직펌프의 안정성은 발전소의 전기생산능력에 중요한 요인이 되고 있다. 해수계통 대형순환펌프는 전동기, 펌프, 양수관, 및 임펠라로 이루어져 있다. 펌프는 수직형(vertical)으로 서 한쪽에는 전동기의 집중 질량이 걸리고, 다른쪽에는 임펠라의 집중 질량이 매달려 있고 가운데 한곳이 고정되어 있는 변형된 단순보 형태이다. 또한 물속에 잠기는 펌프 하부 길이가 10m에 이르는 등 전체적으로 매우 불안전한 구조를 가지고 있다. 이러한 이유 때문에 대형수직펌프에서는 그동안 수많은 고진동 발생과 다양한 진동현상들로 펌프의 안정적 운전에 어려움을 겪어 왔다. 이러한 고진동 해소를 위해 발란싱과 축정렬을 하여 펌프 축 진동을 저감시켰고, 펌프 케이싱 강성을 보강, 베어링의 특성 개선, 및 펌프에 연결된 배관계의 동특성 변화를 통해 펌프 케이싱 진동을 저감시켜 왔다. 그러나, 펌프 회전축 진동을 크게 발생시키는 회전깃수 공진문제는 펌프 축 발란싱과 케이싱 보강으로서는 해결할 수 없으며, 특히 설계적인 문제점을 가진 펌프에서는 해결방안 도출이 매우 어렵다. Typically, power plants make pure water from reservoirs through water treatment, heat them in boilers, and produce high-temperature, high-pressure steam by rotating turbines to produce electricity. Indirect cooling of steam from turbines A closed loop system is used that is heated again. The condenser is used to indirectly cool the steam after working in the turbine, and seawater is used as the indirect cooling water. In other words, the water is passed through the tube between the water falling from the turbine to cool the steam. Therefore, the stability of the seawater system large vertical pump for supplying seawater used as indirect cooling water is an important factor in the electricity production capacity of the power plant. The large seawater circulation pump consists of an electric motor, a pump, a pumping pipe, and an impeller. The pump is a vertical, deformed simple beam with the concentrated mass of the motor on one side and the concentrated mass of the impeller hanging on the other. In addition, the submerged pump has a very unsafe structure, such as a length of 10m below the submerged pump. For this reason, large vertical pumps have had difficulties in stable operation of pumps due to numerous high vibrations and various vibration phenomena. In order to eliminate such high vibrations, pump shaft vibrations have been reduced by balancing and shaft alignment, and pump casing vibrations have been reduced by reinforcing pump casing stiffness, improving bearing characteristics, and changing dynamic characteristics of piping connected to the pump. However, the problem of rotating head resonance, which causes the pump shaft vibration to occur largely, cannot be solved by pump shaft balancing and casing reinforcement, and in particular, a pump having a design problem is very difficult to derive a solution.

본 발명은 전술된 단점과 문제점을 해결하기 위해 창출된 것이다.The present invention has been made to solve the above-mentioned disadvantages and problems.

본 발명에서는 베어링 강성 특성을 고려한 펌프 축계의 동특성 해석을 통해 펌프에 베어링을 1개 더 추가함으로써 고질적인 수직펌프 회전깃수 공진문제를 해결하고자 한다. 수직펌프의 회전깃수 공진해소 시스템은 펌프 상부와 중간부 베어링 사이에 베어링을 1개 추가하여 펌프 축의 임계속도를 변화시켜 회전깃수 공진을 완전하게 해소하는 시스템이다.In the present invention, by adding one more bearing to the pump through the analysis of the dynamic characteristics of the pump shaft system in consideration of the bearing stiffness characteristics, to solve the problem of the resonance of the vertical pump rotational number. The rotating blade resonance cancellation system of the vertical pump is a system that completely eliminates the rotating blade resonance by changing the critical speed of the pump shaft by adding one bearing between the upper and middle bearings of the pump.

전술된 바와 같이, 발전소 해수계통 대형수직펌프에 고진동이 발생하면, 펌프의 불안전한 구조적 특성상 많은 어려움에 직면하여 왔다. 펌프 케이싱 공진 문제나 회전축 불균형 문제들은 대부분 정립되고 있으나 펌프 회전깃수 공진문제는 펌프 베어링을 구비한 회전축계 동특성과 해수 수위 변화에 다른 부가질량 효과가 연성되어 발생되는 문제로서 해결방법이 매우 어려웠다. 특히 베어링 특성이 규명되지 않았고, 펌프 회전축의 상부와 중간 베어링 사이에 펌프 회전축의 절점이 포함되어 있어, 펌프 회전축계 동특성 개선에 어려움이 더해져 왔다. 즉 펌프 회전깃수 공진문제를 해결하기 위해서는 베어링 강성 특성을 고려한 펌프 회전축 동특성 해석 기술과 해수 수위변화에 따른 펌프 축의 부가질량 효과를 예측할 수 있는 유체와 구조의 연성해석기술이 필연적으로 수반되어야 한다. 본 발명에서는 대형수직 펌프 회전깃수 주파수가 펌프 축의 임계속도와 공진을 발생시켜 펌프에 고진동을 유발하는 펌프 회전깃수 공진해소 시스템을 제안한다. 본 시스템은 펌프 축 상부와 중간부 베어링 사이에 설정된 특정을 가진 베어링을 1개 추가하여 공진을 해소하는 시스템이다. 이 공진해소 시스템은 펌프 축의 임계속도를 미소하게 변화시켜 공진을 해소하며 펌프의 전체적인 안정성(축 굽힘 방지)도 증가시키고 있다. 특히 펌프 하부 임펠라에 조개류 등이 부착되어 펌프 축 진동이 상승되어도 축계의 안정성으로 인해 과도한 진동이 발생하지 않은 특성이 있어 해수계통 대형수직펌프의 안정선 확보에 매우 유익하다.As described above, when high vibration occurs in a power plant seawater system large vertical pump, many difficulties have been encountered due to the unstable structural characteristics of the pump. The pump casing resonance problem and the rotation axis imbalance problem are mostly established. However, the pump rotor blade resonance problem is a problem caused by the coupling of the rotating shaft system with the pump bearing and other additive mass effects due to changes in the sea level. In particular, the bearing characteristics have not been identified, and the nodes of the pump shaft are included between the upper and middle bearings of the pump shaft, which makes it difficult to improve the dynamic characteristics of the pump shaft. In other words, in order to solve the resonance problem of the pump rotor blades, it is necessary to involve the analysis of the dynamic characteristics of the pump shaft considering the bearing stiffness characteristics and the ductile analysis technique of the fluid and the structure to predict the additive mass effect of the pump shaft according to the change of the sea water level. The present invention proposes a pump rotation blade resonance cancellation system in which a large vertical pump rotation blade frequency causes resonance with a critical speed of the pump shaft to cause high vibration in the pump. This system eliminates the resonance by adding one bearing with the specified characteristics between the upper and middle bearings of the pump shaft. This resonance cancellation system slightly changes the critical speed of the pump shaft to eliminate resonance and increases the overall stability of the pump (shaft prevention). In particular, shellfish is attached to the lower part of the pump, so even if the vibration of the pump shaft is increased, the stability of the shaft system does not cause excessive vibration, which is very beneficial for securing the stability line of the large vertical water pump.

이상 본 발명의 설명에 의하면, 현재 운전중이 발전소에 적용된 대형수직펌프에 회전깃수 공진으로 인한 축 진동이 과도하게 상승하면 펌프 축을 신규로 설계 및 제작해야하는 문제점이 있다.According to the description of the present invention, there is a problem that the pump shaft must be newly designed and manufactured if the shaft vibration due to the rotational number resonance excessively rises in the large vertical pump currently applied to the power plant during operation.

본 발명은 전술된 문제점을 위해 설치되되, 펌프의 정상 운전중 진동이 저감되고, 과도한 진동에 의한 펌프의 손상을 방지할 수 있고, 펌프를 신규로 제작할 필요성이 없을 뿐만 아니라 대형수직펌프의 안정성을 유지할 수 있도록 제공된다.The present invention is installed for the above-mentioned problems, the vibration during the normal operation of the pump is reduced, it is possible to prevent the damage of the pump by excessive vibration, there is no need to manufacture a new pump as well as to improve the stability of the large vertical pump It is provided to maintain.

이제, 본 발명은 첨부도면을 참조로 하여 더욱 상세하게 설명될 것이다.The invention will now be described in more detail with reference to the accompanying drawings.

본 발명에 따른 대형수직펌프 회전깃수 공진해소 시스템은 종래의 펌프 케이 싱의 진동을 저감하기 위해 안출된 동흡진기와는 다르게 펌프 회전축의 진동을 저감하는 시스템에 관한 것이다. 특히, 펌프 회전축에 발생하는 펌프 회전수 및 조화성분 진동을 저감하기 위해서는 회전축의 축정렬이나 발란싱을 통해 진동을 저감하여 왔으나 회전깃수 공진문제가 발생하면 전술된 방법으로는 해결할 수 없어, 펌프 축을 다시 제작해야 하는 문제점이 있다. 따라서, 본 발명에서는 펌프를 재제작하지 않고 펌프 축의 상부와 중간부 베어링 사이에 설정된 특성값을 가지는 베어링을 1개 더 추가하여 펌프 회전깃수 공진문제를 제거하고자 한다. 상부와 중간부 사이에 베어링 추가를 위해서는 정확한 위치가 반드시 결정되어야 한다. 만약 정확한 위치가 설정되지 않는다면 오히려 펌프 회전수와 공진을 증폭시켜 펌프 축 진동을 크게 상승시키기 때문이다. Large vertical pump rotational number resonance cancellation system according to the present invention relates to a system for reducing the vibration of the pump rotation shaft, unlike the copper reducer is designed to reduce the vibration of the conventional pump casing. In particular, in order to reduce the pump rotation speed and harmonic component vibration generated on the pump shaft, the vibration has been reduced through shaft alignment or balancing of the shaft. There is a problem that must be produced. Therefore, in the present invention, one additional bearing having a set characteristic value between the upper and middle bearings of the pump shaft without remanufacturing the pump is intended to eliminate the pump rotation head resonance problem. The exact position must be determined for the bearing to be added between the upper and middle parts. If the correct position is not set, rather, the pump shaft vibration and resonance are amplified to greatly increase the pump shaft vibration.

도 1은 본 발명에 따른 대형수직펌프의 개략도이다.1 is a schematic diagram of a large vertical pump according to the present invention.

도시된 바와 같이, 본 발명에 따른 대형수직펌프용 공진해소 시스템은 펌프 회전축(1), 리지드 커플링(2), 제1베어링(3), 머프 커플링(4), 제2베어링(5), 제3베어링(6), 임펠라(7), 엑스트라 베어링(8) 및, 전동기(9)로 이루어진다.As shown, the resonance canceling system for a large vertical pump according to the present invention is a pump axis of rotation (1), rigid coupling (2), first bearing (3), muff coupling (4), second bearing (5) , Third bearing 6, impeller 7, extra bearing 8, and electric motor 9.

리지드(rigid) 커플링(2)은 전동기(9)와 펌프를 연결한다. 머프(muff) 커플링(4)은 펌프 회전축(1)의 상부와 하부를 연결하는 매개체 역할을 수행한다. 제1베어링(3)은 펌프 회전축(1) 상부에 위치되는 반면에, 제2베어링(5)은 펌프(10)의 중간지점에 위치된다. 또한, 제3베어링(6)은 임펠라(7)와 동일한 축에 위치된다. 임펠라(7)는 펌프(10) 최하단에 위치되어 물을 퍼 올린다. A rigid coupling 2 connects the electric motor 9 with the pump. The muff coupling 4 serves as a medium for connecting the upper and lower parts of the pump shaft 1. The first bearing 3 is located above the pump axis of rotation 1, while the second bearing 5 is located at the midpoint of the pump 10. In addition, the third bearing 6 is located on the same axis as the impeller 7. The impeller 7 is located at the bottom of the pump 10 to pump up water.

특히 본 발명의 공진해소를 위해 구비된 엑스트라 베어링(8)은 제1베어링(3) 과 머프 커플링(4) 사이에 위치되는 것이 바람직하다. In particular, the extra bearing 8 provided for the resonance cancellation of the present invention is preferably located between the first bearing 3 and the muff coupling 4.

이 엑스트라 베어링(8)은 제1베어링(3)에서 하방으로 2.5~4m 지점의 펌프 회전축(1)에 구비되되, 펌프 회전시 전향과 후향의 임계속도가 펌프 회전깃수 주파수와 떨어지게 되어 공진을 해소할 수 있게 된다.The extra bearing 8 is provided on the pump rotation shaft 1 at a point of 2.5 to 4 m downward from the first bearing 3, and the forward and backward critical speeds of the pump are dropped from the frequency of the pump rotation head to eliminate resonance. You can do it.

바람직하기로, 펌프 회전축(1)에 구비된 베어링(3,5,6,8)들은 저널 베어링(journal bearing)으로 구비된다.Preferably, the bearings 3, 5, 6, 8 provided on the pump rotation shaft 1 are provided as journal bearings.

덧붙여서, 전동기(9)의 구동으로 회전축(1)이 회전하게 되면 회전축(1)을 보호하는 양수관(11)에 상당한 진동이 가해지게 되는데, 이러한 진동으로부터 양수관(11)을 고정시키기 위해 스파이더 형태의 보강대(18)가 양수관(11)의 외주면 둘레를 따라 형성된다. 특히, 이 보강대(18)는 엑스트라 베어링(8)과 동일한 높이에 위치되는 것이 바람직하다. 당해분야의 숙련자들에게 이미 널리 알려져 있듯이, 양수관(11)은 펌프 회전축(1)의 경로를 제공할 뿐만 아니라 임펠라(7)로부터 흡입된 해수의 수로 역할을 수행한다. 이렇게 공급될 해수는 발전소에서 냉각수로 사용된다.In addition, when the rotary shaft 1 is rotated by the driving of the electric motor 9, a considerable vibration is applied to the pump pipe 11 protecting the rotary shaft 1, and the spider is fixed to fix the pump pipe 11 from such vibration. A reinforcing bar 18 in the form is formed along the outer circumference of the pumping pipe 11. In particular, this reinforcement 18 is preferably located at the same height as the extra bearing 8. As is well known to those skilled in the art, the pumping pipe 11 not only provides a path for the pump rotating shaft 1 but also serves as a channel of seawater sucked from the impeller 7. The sea water to be supplied is used as cooling water in power plants.

도 2는 대형수직펌프 구동시 진동크기를 도시한 그래프도로서, 도 2a는 종래에 사용되던 대형수직펌프에서 발생하는 진동크기를 도시한 그래프도이고, 도 2b는 본 발명에 따른 공진해소 시스템을 적용한 대형수직펌프에서 발생하는 진동크기를 도시한 그래프도이다.Figure 2 is a graph showing the magnitude of the vibration when driving a large vertical pump, Figure 2a is a graph showing the magnitude of the vibration generated in a conventional large vertical pump, Figure 2b is a resonance cancellation system according to the present invention This is a graph showing the magnitude of vibration generated in the large vertical pump.

비교실험에 사용될 펌프(10)는 유량이 21,300㎤/hr, 압력이 0.72㎏/㎠, 펌프 전동기 중량은 17톤, 펌프 하부 회전축 길이는 10m로 되어 있는 대형수직펌프이다. 이러한 펌프 축에 현재 운전중인 발전소 해수계통 대형수직펌프에 설치하여 펌프가 정상 운전중 펌프 교체 전?후 진동르 측정하여 진동개선효과를 알아볼 수 있다.The pump 10 to be used in the comparative experiment is a large vertical pump having a flow rate of 21,300 cm 3 / hr, a pressure of 0.72 kg / cm 2, a weight of the pump motor of 17 tons, and a length of the lower shaft of the pump of 10 m. The pump shaft is installed in a large-scale vertical pump of the power plant seawater system currently operating, and the vibration improvement effect can be examined by measuring the vibration before and after the pump is replaced during the normal operation of the pump.

도 2a 및 도 2b를 참조로, 종래의 펌프 축을 사용한 대형수직펌프에서는 펌프 회전깃수의 진동성분이 크게 발생하고, 펌프 회전수 진동크기가 1000㎛pp까지 상승하고 있으나, 본 발명에 따른 공진해소 시스템을 장착한 개선된 펌프 축을 사용한 대형수직펌프에서는 펌프 회전깃수의 진동성분이 없어지고 펌프 회전수 진동크기가 최대 100㎛pp로 매우 양호하게 운전되고 있음을 보여준다. 2A and 2B, in a large vertical pump using a conventional pump shaft, the vibration component of the pump rotation number is largely generated, and the vibration speed of the pump rotation speed is increased to 1000 µmpp, but the resonance canceling system according to the present invention In the large vertical pump using the improved pump shaft, the oscillation component of the pump rotation number is eliminated and the oscillation amplitude of the pump is very good at up to 100㎛pp.

이로써, 본 발명에 따른 대형수직펌프용 공진해소 시스템은 대형수직펌프의 진동저감효과를 제공한다.Thus, the resonance canceling system for a large vertical pump according to the present invention provides a vibration reducing effect of the large vertical pump.

본 발명에 따른 공진해소 시스템은 아래의 첨부도면과 이를 참조로 하여 기술된 실시예에만 국한되지 않고, 아래의 청구범위의 범주와 범위 내에서 변형 및 변경 가능함을 미리 밝혀둔다.It should be noted that the resonance canceling system according to the present invention is not limited to the accompanying drawings and the embodiments described with reference thereto, but may be modified and changed within the scope and scope of the following claims.

도 1은 본 발명에 따른 대형수직펌프의 개략도이다.1 is a schematic diagram of a large vertical pump according to the present invention.

도 2는 대형수직펌프 구동시 진동크기를 도시한 그래프도이다.Figure 2 is a graph showing the vibration size when driving a large vertical pump.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

1 ----- 펌프 회전축,1 ----- pump rotary shaft,

2 ----- 리지드 커플링,2 ----- rigid coupling,

3 ----- 제1베어링,3 ----- first bearing,

4 ----- 머프 커플링,4 ----- muff coupling,

5 ----- 제2베어링,5 ----- 2nd Bearing,

6 ----- 제3베어링,6 ----- third bearing,

7 ----- 임펠라,7 ----- impeller,

8 ----- 엑스트라 베어링,8 ----- extra bearing,

9 ----- 전동기,9 ----- electric motor,

10 ----- 펌프,10 ----- pump,

11 ----- 양수관,11 ----- pumping pipe,

18 ----- 보강대.18 ----- Reinforcement.

Claims (4)

상단에 위치된 전동기(9)와, 최하단에 위치되어 물을 퍼 올리는 임펠라(7), 및 양수관(11) 내부로 관통해 상기 전동기(9)와 임펠라(7) 사이로 뻗어 이들을 상호연결하는 펌프 회전축(1)으로 이루어진 대형수직펌프에 있어서,An electric motor (9) located at the top, an impeller (7) located at the bottom to pump water, and a pump penetrating into the pump pipe (11) and extending between the motor (9) and the impeller (7) to interconnect them. In a large vertical pump composed of a rotating shaft (1), 상기 대형수직펌프는 간접냉각수로 사용되는 바닷물을 공급하는 해수계통의 대형수직펌프의고,The large vertical pump is a large vertical pump of the seawater system for supplying seawater used as indirect cooling water, 상기 펌프 회전축(1)의 상단에 위치되고 상기 전동기(9)와 펌프를 연결하는 리지드 커플링(2)과;A rigid coupling (2) positioned at an upper end of the pump rotating shaft (1) and connecting the electric motor (9) and a pump; 상기 펌프 회전축(1)의 상부와 하부를 연결하는 머프 커플링(4);A muff coupling (4) connecting the upper and lower portions of the pump rotating shaft (1); 상기 펌프 회전축(1)의 상부에 구비된 제1베어링(3);A first bearing 3 provided on an upper portion of the pump rotating shaft 1; 상기 펌프 회전축(1)의 하부에 구비된 제2베어링(5);A second bearing 5 provided below the pump rotating shaft 1; 상기 임펠라(7) 상에 구비된 제3베어링(6); 및A third bearing 6 provided on the impeller 7; And 상기 제1베어링(3)과 상기 머프 커플링(4) 사이에 구비된 엑스트라 베어링(8);으로 이루어 있고, An extra bearing 8 provided between the first bearing 3 and the muff coupling 4, 상기 펌프 회전축(1)에 구비된 상기 베어링(3,5,6,8)들은 저널 베어링(journal bearing)으로 되어 있어서, The bearings (3, 5, 6, 8) provided in the pump shaft (1) is a journal bearing, 대형수직펌프의 회전깃수 공진을 해소하여 펌프에 발생하는 과도한 진동을 저감시키는 것을 특징으로 하는 대형수직펌프용 공진해소 시스템.Resonance cancellation system for large vertical pumps, characterized in that to reduce the excessive vibration generated in the pump by eliminating the rotation of the large vertical pump. 삭제delete 제1항에 있어서, 스파이더 형태의 보강대(18)가 상기 엑스트라 베어링(8)과 동일한 높이의 상기 양수관(11) 외주면에 추가로 구비하는 것을 특징으로 하는 대형수직펌프용 공진해소 시스템.2. The resonance canceling system for a large vertical pump as claimed in claim 1, wherein a spider-shaped reinforcement (18) is further provided on an outer circumferential surface of said pump pipe (11) having the same height as said extra bearing (8). 삭제delete
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KR101201433B1 (en) 2012-08-08 2012-11-14 (주)그린텍 Apparatus for compensating pump performance
KR101224072B1 (en) 2012-07-30 2013-01-21 (주)그린텍 Apparatus for compensating pump performance
KR20230128619A (en) 2022-02-28 2023-09-05 한전케이피에스 주식회사 Resonance avoidance tool for vertical pump

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JP2020051383A (en) * 2018-09-28 2020-04-02 株式会社日立インダストリアルプロダクツ Vertical shaft pump
CN110487548A (en) * 2019-08-30 2019-11-22 福建福清核电有限公司 A kind of vertical pump pump shaft test of Vibration platform
KR102379882B1 (en) * 2020-05-19 2022-03-30 한국전력공사 Apparatus and method for analyzing resonance of seawater vertical pumping pipe

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KR101224072B1 (en) 2012-07-30 2013-01-21 (주)그린텍 Apparatus for compensating pump performance
KR101201433B1 (en) 2012-08-08 2012-11-14 (주)그린텍 Apparatus for compensating pump performance
KR20230128619A (en) 2022-02-28 2023-09-05 한전케이피에스 주식회사 Resonance avoidance tool for vertical pump

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