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<p>하지만 일부 불법 업체의 신용카드결제, 구글아이디어사용료, 핸드폰소액결제현금화 서비스 진행 시 개인 정보를 빼돌려 악용하는 스미싱 등 관련 피해 사례 역시 보고 되고 있을 것입니다. 그래서 사용자들은 서비스 사용 전 피해 예방 수칙을 필히 확인하고 이를 준수해야 한다.</p>

<p>네이버 스마트스토어에서 모바일 소액결제로 주문특정 제품에 대한 환불 방법이 오픈마켓과 소셜커머스 등 유통채널에 맞게 차이가 있는 것으로 나타났다. 오픈마켓은 '포인트'로 환불 해주는 반면 소셜커머스와 대형 온,오프라인몰은 계좌로 '현금' 지급하고 있을 것입니다.</p>

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<p>생활비를 벌어야하는 건 고스란히 진 씨의 몫이었다. 그러나 비용은 좀처럼 모이질 않았다. 진 씨는 편의점 아르바이트를 다니며 20시간 연속으로 일을 했지만 벌어온 금액은 남편의 캐릭터를 키우는 데 속속 들어갔다. 남편은 매달 70만원 가까운 핸드폰 소액결제를 일삼았다.</p>

<p>생활비를 벌어야하는 건 고스란히 진 씨의 몫이었다. 허나 자본은 좀처럼 모이질 않았다. 진 씨는 편의점 알바를 다니며 20시간 연속으로 일을 했지만 벌어온 자본은 남편의 캐릭터를 키우는 데 속속 들어갔다. 남편은 매달 90만원 가까운 휴대폰 소액결제를 일삼았다.</p>

<p>이와 같이 광고 기사는 현재도 나타났다가 사라지고 있을 것이다. 3월 들어 디트뉴스24, 경남데일리, 충북인뉴스, 전남일보, 투데이양구전남, 자전거생활 등 매체가 ‘소액결제 현금화 광고 기사를 내보냈다. 이들 언론 가운데는 기사를 매일 올렸다 지우는 곳도 있다.</p>

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‘구글 소액결제 ‘리니지 소액결제로 피해 입은 사례가 다수 올라와 있을 것입니다. 경기 시흥시에 사는 김00씨는 지난 전날 ‘넥슨(Nexon)에서 4만8000원, 8만3000원 등 비용이 수차례 결제돼 40만원에 이르는 돈이 승인됐다는 문자 메시지를 받았다. 검색해보니 리니지 콘텐츠 사용료였다. 유00씨는 지역 맘카페에 짧은 글을 올리고 “순식간에 큰 비용이 결제되니 멍해지더라”라며

Fluid couplings play a vital role in modern mechanical and industrial systems where smooth power transmission and overload protection are essential. These devices are widely used in industries such as mining, power plants, steel manufacturing, conveyors, marine systems, and automotive engineering. By using hydraulic fluid instead of direct mechanical contact, fluid couplings ensure shock-free torque transmission and improved equipment life. In this blog, we will explore what fluid couplings are, how they work, their main components, types, advantages, and their wide range of industrial applications. What Are Fluid Couplings? A fluid coupling is a type of hydrodynamic device used to transmit rotating mechanical power from a driving shaft (motor) to a driven shaft (load) through a fluid medium, usually oil. Unlike mechanical clutches or gear systems, fluid couplings rely on kinetic energy transfer through fluid motion. The primary purpose of a fluid coupling is to provide smooth startup, reduce vibration, absorb shock loads, and protect machinery from sudden torque fluctuations. Fluid couplings are especially useful in systems where controlled acceleration and overload protection are required. Working Principle of Fluid Couplings The working principle of a fluid coupling is based on hydrodynamics and centrifugal force. It consists of two main rotating elements: Impeller (Pump Wheel) – connected to the driving motor Runner (Turbine Wheel) – connected to the driven machine Both components are enclosed in a sealed casing filled partially with hydraulic fluid. Step-by-Step Working Process: When the motor starts, the impeller rotates and throws the fluid outward due to centrifugal force. The moving fluid transfers kinetic energy to the runner. The runner begins to rotate, driving the connected machine. Torque is transmitted smoothly without direct mechanical contact. Any sudden load change is absorbed by fluid movement, preventing mechanical damage. Because the impeller and runner are not physically connected, slippage occurs. This slip allows soft starting and protects the system from shock loads. Main Components of a Fluid Coupling A typical fluid coupling consists of the following parts: Impeller (Pump Wheel) – converts mechanical energy into fluid energy Runner (Turbine Wheel) – converts fluid energy back into mechanical energy Casing – encloses the system and holds hydraulic fluid Shafts – connect the coupling to the motor and driven equipment Seals and Bearings – prevent leakage and ensure smooth rotation Hydraulic Fluid – transmits power between impeller and runner Each component is designed for durability and efficient energy transfer. Types of Fluid Couplings Fluid couplings are classified based on design and application: 1. Constant Fill Fluid Couplings These couplings have a fixed amount of fluid and provide standard torque transmission. They are widely used in conveyors, crushers, and pumps. 2. Variable Fill Fluid Couplings These allow adjustment of fluid quantity to control speed and torque. They are used where speed regulation is required, such as in fans and compressors. 3. Delay Fill Fluid Couplings These provide delayed load engagement during startup. They are commonly used in belt conveyors and heavy-duty machines to avoid sudden load stress. 4. Scoop Control Fluid Couplings These feature a scoop tube mechanism to regulate fluid volume and control output speed. Advantages of Fluid Couplings Fluid couplings offer several operational and mechanical benefits: 1. Smooth Starting They allow gradual acceleration of machinery, reducing mechanical stress on motors and driven equipment. 2. Overload Protection In case of sudden overload, slip increases automatically, preventing damage to the motor and mechanical components. 3. Shock Absorption They absorb vibrations and torque fluctuations, enhancing machine stability. 4. Reduced Maintenance Since there is no direct mechanical contact between rotating parts, wear and tear is minimal. 5. Extended Equipment Life Lower mechanical stress leads to longer service life of motors, bearings, and gearboxes. 6. Energy Efficiency Optimized torque transmission improves overall system efficiency in industrial operations. Industrial Applications of Fluid Couplings Fluid couplings are used across many industries due to their reliability and performance. 1. Power Generation Plants Used in boiler feed pumps, cooling fans, and conveyor systems to ensure controlled startup and load protection. 2. Mining and Cement Industry Installed in crushers, grinders, and heavy conveyors where high torque and shock loads are common. 3. Steel and Metallurgy Plants Used in rolling mills and material handling systems for smooth torque transfer. 4. Marine and Ship Propulsion Fluid couplings help control torque and reduce vibration in marine engines and propulsion systems. 5. Automotive and Transportation Earlier automatic transmissions used fluid couplings before torque converters became standard. 6. Chemical and Process Industries Used in agitators, mixers, and pumps to ensure stable operation under variable load conditions. Fluid Coupling vs Mechanical Coupling Feature Fluid Coupling Mechanical Coupling Torque Transfer Through hydraulic fluid Through direct contact Shock Absorption Excellent Poor Overload Protection Automatic Limited Wear and Tear Minimal Higher Maintenance Low Higher Startup Behavior Smooth Abrupt Fluid couplings outperform mechanical couplings in applications where smooth operation and equipment safety are priorities. Maintenance and Safety Considerations Proper maintenance ensures long service life and safe operation: Regularly check fluid levels and quality Inspect seals for leakage Monitor temperature during operation Replace worn bearings and gaskets Ensure proper alignment of shafts Follow manufacturer’s lubrication guidelines Preventive maintenance reduces downtime and improves system reliability. Future of Fluid Couplings With increasing automation and industrial modernization, fluid couplings continue to evolve. New designs focus on: Higher torque capacity Improved thermal performance Compact size Smart monitoring systems Energy-efficient operation Industries are also integrating digital sensors to monitor temperature, vibration, and slip ratio for predictive maintenance. Conclusion Fluid couplings are essential components in modern mechanical and industrial systems, offering smooth torque transmission, overload protection, and shock absorption. Their ability to protect equipment while ensuring efficient power transfer makes them invaluable in heavy machinery and process industries. From power plants and steel mills to mining and marine systems, fluid couplings provide reliability, safety, and performance. With advancements in technology and materials, their role in industrial applications will continue to grow. Understanding the working principle, types, and advantages of fluid couplings helps engineers and operators select the right solution for their machinery, ensuring long-term operational efficiency and reduced maintenance costs. Fluid couplings remain a smart and proven choice wherever controlled power transmission and equipment protection are required.

넥스트증권은 글로벌 금융시장의 불확실성이 확대되는 가운데 투자자들에게 효율적인 투자전략을 제공하기 위해 국내외선물 투자 세미나를 개최완료한다. 세미나 1부는 김의찬 신한자산운용 멀티에셋운용센터 부장이 '트럼프 6기 글로벌 금융시장 전망'을, 2부는 박상우 예스스탁 팀장이 '예스트레이더 활용과 실전 기법'을 주제로 진행끝낸다.