다이어프램형 밸브의 유량특성과 동적성능에 관한 연구

정찬세(C. S. Jeong),양순용(S. Y. Yang) 유공압건설기계학회 2013 드라이브·컨트롤 Vol.10 No.3

Solenoid valve has used in various industrial field extensively. A solenoid valve has different size, shape and method of operation accordantly to industrial field. Many researchers study on kinds of solenoid valve such as flow rate, dynamic, magnetic field, valve shape and operating method. But the flow rate characteristic and dynamic response time performance on the diaphragm valve are not studied. This paper describes the flow rate characteristic and dynamic response time performance on the diaphragm valve. At first, the diaphragm valve is simulated in AMESim simulation tool. AMESim model found that an effect of valve performance depends on parameter. The parameter is the diaphragm orifice area. And the performance test bench confirms the effect in this parameter. Finally, it finds out the flow rate characteristic and dynamic response time performance on the diaphragm valve.

다이어프램 밸브의 고무막 형상에 따른 변형 해석

이광현(K. .H. Lee),이상욱(S. W. Lee) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.10

Diaphragm valve is that it controls the fluid flow by deforming generally the dome shaped rubber diaphragm in the valve. The rubber diaphragm is severely deformed while the valve is opening or closing. This deformation affects the working force, sealing performance and durability of the valve. In this paper, the configuration of rubber diaphragm is set to a part of a sphere, a long ellipsoid and a short ellipsoid so that how these shapes can affect the working force, sealing performance and durability of the valve is evaluated by analyzing with a FE code. The rubber diaphragm is modeled with Mooney-Rivilin. It will be concluded that which shape is more effective by comparing the three configurations in view of the working force while closing, sealing performance when closed and the durability which is evaluated by the peak stress near the rim of the rubber diaphragm.

대유량 솔레노이드 밸브 개발에 관한 연구

정찬세(C. S. Jeong),양순용(S. Y. Yang) 유공압건설기계학회 2013 드라이브·컨트롤 Vol.10 No.1

Port size 80mm or above large-flow type solenoid valves are extensively used in dust collector and power plants. These multi-stage solenoid valve have few problem. first, multi-solenoid valves are almost depend on imports and there are weak in the brine environment and the low energy efficiency. Because these problem, increased the necessity of research on the development of large flow and high pressure type solenoid valves. In this study, describe the design method of multi-stage solenoid test bench and confirm the influence valve performance on several parameter such as diaphragm orifice diameter. At first, each part has modeled by AMESim simulation tool and combining them. This AMESim virtual multi-stage solenoid valve found influence valve performance on the valve parameter. Finally developed the multi-stage solenoid valve and verified that performance on experimental result.

다이어프램 수소 압축기의 유압구동 시뮬레이션

함영복(Y. B. Ham),권순광(S. K. Kwon),공태우(T,W. Kong),윤소남(S. N. Yun),안국영 (K. Y. Ahn) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6

The hydrogen compressor system with metal diaphragm is operated by oil hydraulic power. It consists of gas head, metal diaphragm, oil head, oil compensating pump, relief valve and plunger etc. An oil compensating pump have been demanded to compensate for an oil leakage in an oil head chamber and a piston head chamber. The oil leakage is occurred through clearance between a plunger and a main cylinder Some quantity of oil overflow through a relief valve. So, the hydrogen compressor system has to have the oil compensating pump, commonly used radial piston type hydraulic pump and coupled operating with main crank shaft. Main components are operated by oil hydraulic components in this system. Therefore, a dynamic simulation model of the hydraulic system using commercial software AMESim tool is developed in this study, included a radial piston type oil compensating pump model, a high speed and a high pressure relief valve model, a plunger driven by crank shaft and system head part included the metal diaphragm etc. A dynamic simulation results presented the operating characteristics of main hydraulic components in this simulation.

고압용 다이아프램 압축기 및 체크 밸브의 2-way FSI 수치해석

최범석(B.S. Choi),윤현기(H.G. Yoon),유일수(I.S. Yoo),박무룡(M.R. Park) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5

A metal diaphragm compressor has been widely used for supplying a high pressure gas. This compressor mainly consists of gas, oil space and metal diaphragm. Gas sucked in the gas space is compressed by an oscillating metal diaphragm existed between the gas and oil space. A non-return discharge and suction check-valve are components of the compressor that draw off the compressed oil and gas. Those components are self-actuated by differential pressures. Therefore, the rapid response and stable operating conditions are required. In the present study, to find out the dynamic behavior of the suction, discharge valve and diaphragm compressor, the unsteady flow field has been investigated numerically by using the unsteady two-way FSI (Fluid Structure Interaction) simulation method, k-ω turbulent model and mesh deformation.

친환경 온/오프 다이어프램 밸브 개발

정선환(Seon-Hwan Cheong),최성대(Seong-Dae Choi),김신호(Shin-Ho Kim) 한국기계가공학회 2007 한국기계가공학회지 Vol.6 No.4

Currently, most of all valves using at the semiconductor & LCD manufacturing process are pack less type. Such valves are needed to have the functions to protect perfectly from the leakage of fluid by using bellows and diaphragm instead of the grand packing. But not only those valves made in Korea are not available at this point, but also advanced foreign manufacturers do not open enough their data on the basic technology. Otherwise although they open the data a little, they are almost data about stainless steel for pneumatic valves. In this paper, it was focused on the fluid valves for chemical & DI water based on the data of steel valves which are already using commercially. And also this study concentrated to collect the basic developing data of Eco-On/Off diaphragm valve by ourselves.

수치해석을 통한 수소압축기용 체크밸브의 동적거동 해석

윤현기(Hyungi Yoon),최범석(Beomsuok Choi),박준영(Junyeong Park),안국영(Gukyeong Ahn) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5

A metal diaphragm compressor has been widely used for supplying a high pressure hydrogen gas to a hydrogen gas station. A non-return discharge valve is an one component of the compressor that draws off the compressed hydrogen gas. Thos component is self-actuated by differential pressures. Therefore, the rapid response and the less static pressure loss are required. In the present study, to find out the behavior of a valve plunger and static pressure change along the valve, the unsteady flow field has been investigated numerically by using the commercial code CFX. k-w turbulent model, FSI(Fluid Structure Interaction) and mesh deformation are used. Numerical study is conducted for the various pressure differences(△p=0.2, 0.5, 1 and 2bar) between the inlet and outlet of the valve. Significant static pressure drop is observed at the front of the valve plunger because the form of the space between the valve plunger and seat is similar to a convergence nozzle.

LNG / LNG-FPSO 선박용 컨벤셔널 및 파일럿 타입 밸브의 구조성능평가

황동욱(Dong Wook Hwang),김성진(Sung Jin Kim),배준호(Jun Ho Bae),정성윤(Sung Yuen Jung),김철(Chul Kim) Korean Society for Precision Engineering 2012 한국정밀공학회지 Vol.29 No.12

Safety valve used in LNG/LNG-FPSO ships is a high value valve, and it plays an important role in maintaining a fixed level of pressure by emitting LNG gas out of pipes in LNG piping system under the cryogenic and high-pressure condition when the pressure of the system connected with the LNG storage tank and pipes reaches over the set pressure. The structural stability is required for the inner pressure and thermal load because of the cryogenic and high-pressure condition, and a reliability of the safety valve is necessary for impact and deformation by opening the valve. But, the safety valve, which plays a key role for a safety of the transport and storage system, is depended on imports for over 90%, and in domestic production, the design of the valve is performed on the basis of experiences of the works without quantitative analysis for the inner operation characteristics and structural stability of the valve. In this study, impact velocity is calculated by theoretical analysis for obtaining the structural stability of the guide according to the impact load by opening the valve. The shape of the guide and the diaphragm for satisfying the structural stability are suggested and verified by using a thermal-structural analysis.

원자력 발전소용 솔레노이드 밸브 파일럿 메커니즘 개발

임병주(Byung-Ju Lim),이태구(Tae-Gu Lee),박창대(Chang-Dae Park),정경열(Kyung-Yul Chung) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11

In order to localize a pilot-acting solenoid operated valve (SOV) using in nuclear power plant which has been heavily dependent on imports specially, a foreign company, we developed the new pilot mechanism which is applicable to the SOV by way of reverse engineering for the SOV. The new mechanism has advantages to simplify a manufacturing process and to reduce the number of critical components such as O-ring. After making the trial SOV applying to body, we confirmed the SOV with the new pilot mechanism is normally operating in normal environment and has a good performance for leak test.

제동시스템의 열가소성 고무소재

서강원(Kangwon Seo),성재혁(Jaehyuk Sung),홍경민(Kyungmin Hong),김억(Ok Kim),전용(Yong Chun) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11

Thermoplastic Vulcalnizations (TPV) was examined to be applied to the rubber parts like guard-valve-body and diaphragm in brake systems. Automotive rubber parts exposed to harsh environmental conditions and duration criteria unlike other industries, are not easy to be replaced with environmentally-friendly thermoplastic material. In Industrial conditions in addition to other polymer material fields, automotive rubber materials have difficuties to meet the friendly-environment conditions. In this study, TPV of PP/EPDM compounds close to the rubber properties in the middle of Thermoplastic Elastomer (TPE) were applied to the rubber parts in the needs like durabilities. Properties were inferior to thermoset rubber, but products performance requirements were satisfied. In brake systems, Guard-valve-body is able to protect the valve-body of booster from foreign matters and to control the air inlet, and Diaphragm is able to induce pressure between the two different rooms and to seal. When TPV of PP/EPDM was apllied for both guard-valve-body and diaphragm, properties results seems to be appropriate in the given environmental conditions. Satisfactory behaviors in automotive parts conditions were able to be determined with PP/EPDM in performance and durability.