หน่วยวัดแรงดัน

หน่วยวัดแรงดัน

หน่วยวัดแรงดัน คือ หน่วยที่ใช้เรียกแรงกระทำที่เกิดในหนึ่งพื้นที่ ส่วนใหญ่จะเป็นหน่วยในระบบ SI ซึ่งนิยมใช้หลากหลาย ไม่ว่าจะเป็น Bar,PSI,MPa,Kg/cm² ฯลฯ วันนี้เราจึงพามาทำความรู้จักชื่อเรียกและวิธีการแปลงหน่วยกันครับ

แรงดัน คือ

แรงดันหมายถึง แรงที่กระทำต่อหนึ่งพื้นที่ในแนวตั้งฉาก โดยแรงดันสามารถคำนวณได้จาก แรงหารด้วยพื้นที่ ตามสูตร

P=F/A

โดย

P = Pressure , แรงดัน
F = Force , แรงกระทำ
A = Area , พื้นที่หน้าตัดที่ถูกแรงกระทำ

ตารางแปลงหน่วยวัดแรงดัน

Bar PSI MPa Kg/cm² ATM mmHg inHg
Bar 1 14.5 0.1 1.02 0.99 750.06 29.53
PSI 0.07 1 0.007 0.07 0.07 51.71 2.04
MPa 10 145.03 1 10.2 9.87 7500.62 295.3
Kg/cm² 0.98 14.22 0.1 1 0.97 735.57 28.96
ATM 1.01 14.7 0.1 1.03 1 760 29.92
mmHg 0.001 0.019 0.0001 0.001 0.001 1 0.04
inHg 0.03 0.49 0.003 0.03 0.03 25.4 1

หมายเหตุ : การแปลงค่าในตารางข้างต้นนี้เป็นเพียงค่าที่แสดงคร่าวๆโดยการปัดเศษทศนิยม2หลัก

หากท่านต้องการแปลงค่าโดยไม่ต้องมานั่งคำนวณ ผมขอแนะนำเครื่องมือนี้ >> Pressure Unit Converter (Click)

หน่วยวัดแรงดัน

Bar = บาร์

PSI = ปอนด์ต่อตารางนิ้ว

MPa = เมกะปาสคาล

Kg/cm² = กิโลกรัมต่อตารางเซนติเมตร

ATM = แรงดันบรรยากาศ

mmHg = มิลลิเมตรปรอท (ในอุตสาหกรรมนิยมใช้กับสุญญากาศ)

inHg = นิ้วปรอท (ในอุตสาหกรรมนิยมใช้กับสุญญากาศ)

จริงๆแล้วหน่วยวัดแรงดันยังมีอีกหลายหน่วย แต่ในที่นี้เราจะขอยกมาเฉพาะที่นิยมใช้กับในอุตสาหกรรมนะครับ

คำถามที่พบบ่อย

1 bar = 14.5037738 pounds per square inch

1 bar = 100 kilopascals

1 bar = 0.1 Megapascals

1 psi = 6.89475729 kilopascals

1 psi = 1 ปอนด์ หรือถ้าจะให้พูดให้ถูกจริงๆ มันคือหน่วยเดียวกัน เพราะปอนด์ในที่นี้หมายถึง ปอนด์ต่อตารางนิ้ว หรือ pound per square inch ซึ่ง คนมักจำในชื่อ psi

1 psi = 0.0689475729 bar

1 MPa = 10 bar

1 MPa = 145.038 PSI

1 atm = 101,325 pascals

12 thoughts on “หน่วยวัดแรงดัน

  1. Pingback: วิธีอ่านเกจวัดแรงดัน

  2. Pingback: การติดตั้ง Pressure gauge ที่ถูกต้อง

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  5. อนุรักษ์ โรจน์วรวัฒนา says:

    ผมมีกระบอกไฮดรอลีค แกน 56 มม.
    ใช้แม่ปั๊มโยก ขนาดแกนด้านหยาบ 19 มม
    และแกนปั๊มด้านละเอียด 10 มม.
    ต้องใช้เกจวัดแรงดัน ขนาดเท่าไรครับ ?
    ขอบคุณครับ
    (แท่นอัดไฮดรอลีคแปลงครับ)

    • admin says:

      ขนาดหน้าปัดของเกจขึ้นอยู่กับความสะดวกในการอ่านค่าของลูกค้าครับ
      ส่วนเรื่อง Range ขึ้นอยู่กับขนาดแรงดันที่ปั๊มของลูกค้าสามารถทำได้ครับ โดยทั่วไปจะนิยมให้ Working Pressure มีค่าอยู่ที่ 50-60% ของ Max Pressure ของตัวเกจครับ

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  7. Pingback: เกจวัดแรงดันลม - UdySupply

  8. Mancubus0Apody says:

    portable balancer

    Portable Balancer: The Balanset-1A
    The Balanset-1A is a revolutionary portable balancer and vibration analyzer designed to deliver precise dynamic balancing across a variety of rotor types. This state-of-the-art device provides a comprehensive platform for users needing high accuracy while working with machines like crushers, fans, mulchers, augers, and turbines. Beyond just balancing, the Balanset-1A serves as a critical tool for efficiency in multiple industries, showcasing its significance in maintaining optimal machine performance.

    Key Features and Functionality
    The Balanset-1A equips users with dual channels for dynamic balancing in two planes, ensuring versatility for handling different rotors. Some of the notable features include:

    Vibrometer Mode: Accurately captures vibration levels, providing the essential data necessary for effective analysis.
    Tachometer: Measures the rotational speed in RPM for precise operational awareness.
    Phase Analysis: Evaluates the vibration signal’s phase angle, offering deeper insights into rotor behavior.
    FFT Spectrum: Generates detailed frequency spectrum analyses of vibration signals, enhancing fault detection reliability.
    Measurement Logging: Saves data for retrospective analysis, ensuring that users can efficiently monitor and improve performance over time.

    Balancing Modes
    The Balanset-1A provides multiple balancing modes tailored to different rotor requirements:

    Single Plane Balancing: Effective at minimizing vibrations through a precise balancing process focused on one plane.
    Two Plane Balancing: Enables dynamic balancing by addressing both planes, ensuring a comprehensive approach to vibration control.
    Polar Graph Visualization: Offers visual representation of imbalance, helping users determine where to place corrective weights and optimizing the balancing process.
    Tolerance Calculator: Calculates acceptable balancing thresholds per ISO 1940 standards, ensuring compliance across operations.
    Grinding Wheel Balancing: Integrates three counterweights to balance grinding wheels, ensuring precision during critical processes.

    Additional Capabilities
    The Balanset-1A does not just stop at balancing; it expands its functionality to include:

    Archiving: Capable of storing and retrieving past balancing sessions, enabling seamless follow-up on previous work.
    Report Generation: Produces detailed reports illustrating the outcomes of balancing efforts, ideal for analytical and review purposes.
    Re-balancing Support: Facilitates integrating saved data for repeated balancing processes, enhancing convenience and effectiveness.
    Compatible Systems: Supports both metric and imperial measurement systems, allowing global usability and adaptability.

    Technical Specifications
    Built with advanced technology, the Balanset-1A is equipped with essential components that enhance its functionality:

    Two vibration sensors (4m cable length, optional 10m) for effective vibration measurement.
    Laser tachometer with a measurement range of 50 to 500mm to capture rotational speed.
    USB interface module for PC connectivity, allowing for seamless software integration and data transfer.
    Measurement capabilities that include rotational speed from 250 to 90,000 RPM and a vibration phase shift range from 0 to 360 degrees.
    Operating power needs between 140-220VAC at 50Hz, while maintaining a manageable weight of 4 KG.

    Why Choose a Portable Balancer?
    Investing in a portable balancer like the Balanset-1A is crucial for any industry dealing with rotating machinery. It significantly reduces downtime by ensuring machines are operating within their optimal vibration levels. Precise balancing not only enhances the performance of equipment but also extends its lifespan, ultimately leading to reduced maintenance costs.

    Conclusion
    The Balanset-1A emerges as an indispensable tool for engineers, technicians, and industry professionals striving for excellence in machine performance. Whether engaged in heavy-duty industrial tasks or specific machine maintenance, having the capability to conduct detailed vibration analysis and effective balancing is vital. The Balanset-1A embodies the modern approach to machine maintenance, reflecting a growing need for advanced, portable solutions in an increasingly technology-driven world.

  9. JeremyOpess says:

    turbine balancing

    Turbine Balancing: A Comprehensive Guide
    Turbine balancing, an essential process in mechanical engineering, ensures the operational efficiency and longevity of rotating machinery. Optimal turbine performance is crucial in various industries, particularly in fields such as energy production, aviation, and manufacturing. This guide aims to provide an insightful exploration of turbine balancing, its processes, equipment, and importance in preventing operational failures.

    Understanding Turbine Imbalance
    Turbine imbalance can arise due to factors such as uneven mass distribution in the rotor, misalignment, and wear over time. This imbalance not only causes vibrations during operation but can also lead to severe mechanical failures if not addressed promptly. Thus, comprehending the differences between static and dynamic balancing becomes vital for effective turbine maintenance.

    Static vs. Dynamic Balance
    Static balance occurs when a rotor remains stationary. In this state, the center of gravity does not align with the axis of rotation, causing the heavier side to tend downwards. Correcting static imbalance typically involves adding or removing mass to achieve alignment. This method is effective for narrow, disk-shaped rotors.
    Dynamic balance is more complex, occurring only when the rotor is in motion. It involves two planes of mass displacement, resulting in additional rotational forces that generate unwanted vibrations. Dynamic balancing requires advanced techniques and equipment to effectively measure and correct these imbalances.

    The Dynamic Balancing Process
    For effective turbine balancing, utilizing a dynamic balancing device, such as the Balanset-1A, is essential. This equipment is specifically designed for two-plane dynamic balancing, allowing for comprehensive analysis and correction of imbalances in various rotor types, including turbines.

    Initial Vibration Measurement
    The dynamic balancing process begins with an initial vibration measurement. The turbine rotor is mounted on a balancing machine with vibration sensors connected. As the rotor runs, the sensors track and display the vibration levels on a connected computer. This initial data serves as the baseline for identifying necessary corrections.

    Calibration and Weight Adjustments
    The next step in turbine balancing involves installing a calibration weight to assess how it impacts the rotor’s vibrations. The weight is placed on one side of the rotor, and the rotor is restarted. The changes in vibration levels are recorded, enabling operators to analyze the effect of the additional mass.
    Operators then test further adjustments by repositioning the calibration weight. By iteratively moving this weight and measuring vibrations, an insight into the optimal corrective measures can be attained. This process culminates in determining where compensatory weights should be installed for effective balancing.

    Calculating and Installing Corrective Weights
    Using the data gathered during the calibration phase, calculations for the corrective weights’ mass and installation angle are made. This involves assessing the turbines’ rotational dynamics and identifying where to place corrective masses for achieving a balanced state.
    The installation of these corrective weights marks the pinnacle of the balancing process. Once installed, the rotor is restarted, and final vibration measurements are taken to confirm that vibration levels have diminished to acceptable ranges, verifying the success of the balancing effort.

    The Importance of Turbine Balancing
    Efficient turbine balancing is critical for multiple reasons. First, it minimizes vibrations, leading to enhanced machine performance and reduced wear on components. This, in turn, results in lower maintenance costs and greater operational reliability.
    Second, proper balance can extend the lifespan of the turbine itself and associated machinery. Uncorrected imbalances can trigger excessive wear, leading to costly repairs or, worse, complete operational failures. By prioritizing turbine balancing, companies can significantly mitigate these risks.
    Moreover, adhering to turbine balancing protocols contributes to energy efficiency. When turbines operate smoothly within their specified limits, they consume less energy and produce less strain on the mechanical systems, creating a sustainable operational environment.

    Conclusion
    Turbine balancing is a vital maintenance practice for the operational efficiency and durability of rotating machinery. Through the understanding of static and dynamic balancing, and employing the right equipment like the Balanset-1A, operators can effectively diagnose and correct imbalances. This process not only ensures optimal performance but also significantly decreases the likelihood of mechanical failures, ultimately leading to increased productivity and lower maintenance costs.
    As industries continue to evolve, the need for precision in turbine balancing will only grow. By investing in the right tools and training, companies can navigate the challenges of maintaining these critical components and optimize their operational efficiencies for years to come.

  10. HollisDub says:


    Watch YouTube Short
    Balanset-1A: Advanced Rotor Balancing Device and Resonance Frequency Insights

    Ensuring the optimal performance of mechanical systems relies heavily on precise rotor balancing and understanding resonance frequencies. The Balanset-1A rotor balancing device by Vibromera stands out as a cutting-edge solution designed to enhance mechanical efficiency and longevity. This article delves into the features of Balanset-1A, the importance of resonance frequency, and the comprehensive process of rotor balancing.

    Understanding Rotor Balancing
    Rotor balancing is crucial for maintaining the smooth operation of machinery. It involves adjusting the mass distribution of a rotor to minimize vibrations during rotation. Proper balancing ensures that mechanisms are technically sound, securely mounted, and free from defects. Before initiating the balancing process, it is essential to repair any mechanical issues, install reliable bearings, and secure the rotor firmly in place. Additionally, the rotor must be thoroughly cleaned to eliminate contaminants that could interfere with balancing accuracy.

    Preparing for Balancing with Balanset-1A
    Preparation is key to successful rotor balancing. Begin by selecting appropriate installation points and attaching vibration sensors and phase indicators as per recommended guidelines. Prior to balancing, it is advisable to perform measurements using a vibration meter to assess the overall vibrational state of the mechanism.
    If the total vibration amplitude (V1s/V2s) closely matches the rotational component (V1o/V2o), it suggests that rotor imbalance is the primary source of vibration. Conversely, if the total vibration significantly exceeds the rotational component, a more thorough inspection is necessary. This includes checking bearing conditions, ensuring secure mounting to the foundation, verifying that the rotor does not contact stationary parts during rotation, and assessing the impact of vibrations from other machinery.
    Analyzing time function graphs and vibration spectra obtained through “Graph-Spectral Analysis” can provide valuable insights into the mechanism’s condition.

    The Balanset-1A Balancing Process
    The Balanset-1A device offers a streamlined and precise approach to rotor balancing, encompassing several key stages:

    1. Equipment Preparation
    Attach vibration sensors perpendicular to the rotor’s axis of rotation. Secure a laser tachometer on a magnetic stand, aligning it with a reflective tape on the pulley. Connect the sensors to the Balanset-1A device and link the device to a laptop via USB. Launch the Balanset software and select the two-plane balancing mode.

    2. Initial Vibration Measurement
    Weigh the test mass and note its weight and installation radius. Activate the rotor and measure the initial vibration levels to determine the amplitude and phase of the existing imbalance.

    3. First Plane Balancing
    Place the test mass in the first balancing plane corresponding to the first sensor’s location. Restart the rotor and measure the vibration level. A change of at least 20% in amplitude or phase indicates partial correction of the imbalance.

    4. Second Plane Balancing
    Move the test mass to the second balancing plane where the second sensor is installed. Re-activate the rotor and perform another measurement. These results help the software calculate the precise position and weight of the corrective masses.

    5. Imbalance Correction
    Based on the data, the Balanset software recommends the appropriate weights and angles for installation in both planes. Remove the test mass and install the corrective masses as directed, ensuring they are positioned at the correct angles relative to the rotor’s rotation.

    6. Final Verification
    Run the rotor for a final vibration check. If vibrations have been reduced to acceptable levels, the balancing process is complete. If necessary, additional corrections can be made as suggested by the software.

    Resonance Frequency: A Critical Parameter
    Resonance frequency is the natural frequency at which a system vibrates with maximum amplitude. In rotor balancing, it’s essential to identify and avoid operating at or near the system’s resonance frequency to prevent excessive vibrations that can lead to equipment failure. The Balanset-1A device aids in detecting resonance frequencies, allowing operators to adjust operational parameters to maintain safe and efficient machinery performance.

    Benefits of Balanset-1A

    Compact and Portable: The Balanset-1A’s sturdy, compact design facilitates easy transport for on-site and fieldwork, making it ideal for various industrial environments.
    User-Friendly Software: The intuitive Balanset software provides step-by-step instructions, automatically calculating corrective weights and angles, simplifying the balancing process.
    Versatile Functionality: Combining vibrometer and balancing device capabilities, Balanset-1A allows users to monitor vibrations, perform spectral analysis, and execute precise balancing.
    High Measurement Accuracy: With phase measurement precision up to В±1В° and vibration indicators accurate within В±5%, Balanset-1A meets stringent industrial standards.
    Cost-Effective: Offering a favorable price-to-quality ratio, Balanset-1A is accessible for both large-scale productions and small workshops, ensuring widespread applicability.
    Reliable Support: Accompanied by a one-year warranty and dedicated technical support from Vibromera, users can trust in the device’s long-term reliability.

    Conclusion
    The Balanset-1A rotor balancing device is an invaluable tool for maintaining mechanical systems’ efficiency and longevity. By providing precise balancing, accurate resonance frequency detection, and user-friendly operation, it ensures machinery operates smoothly and reliably. Whether in industrial settings or smaller workshops, Balanset-1A offers a comprehensive solution for rotor balancing needs, promoting reduced downtime and enhanced performance.

    [b]Contact Information:[/b]

    For more information about our Balanset balancing devices and other products, please visit our website: https://vibromera.eu.

    Subscribe to our YouTube channel, where you will find instructional videos and examples of completed work: https://www.youtube.com/@vibromera.

    Stay updated with our latest news and promotions on Instagram, where we also showcase examples of our work: https://www.instagram.com/vibromera_ou/.

    Buy Balanset-1A on Etsy

    Balanset-1A OEM on Facebook Marketplace

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