Miércoles, 17 Febrero 2021 23:30

Item1Finanzas

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Las finanzas corresponden a un área de la economía que estudia la obtención y administración del dinero y el capital, es decir, los recursos financieros. Estudia tanto la obtención de esos recursos (financiación), así como la inversión y el ahorro de los mismos.

Las finanzas estudian cómo los agentes económicos (empresas, familias o Estado) deben tomar decisiones de inversión, ahorro y gasto en condiciones de incertidumbre. Al momento de elegir, los agentes pueden optar por diversos tipos de recursos financieros tales como: dinerobonosacciones o derivados, incluyendo la compra de bienes de capital como maquinarias, edificios y otras infraestructuras. Ver diferencia entre ahorro e inversión.

Los intermediarios financieros son los agentes dedicados a poner en contacto las dos partes de las finanzas, los ahorradores y los que necesitan financiación.

Las finanzas ayudan a controlar los ingresos y gastos, tanto al Gobierno, a las empresas, como a cada uno de nosotros. Tener un buen control de las finanzas nos permite gestionar mejor nuestros recursos, conociendo al detalle todos los ingresos y gastos, para tener un mayor control sobre ellos mismos.

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    Industrial fan balancing is a critical aspect of maintenance for industrial equipment, ensuring optimal performance and longevity of fans. Fans, when operating, are highly susceptible to imbalances that can lead to excessive vibrations. These vibrations not only jeopardize equipment reliability but also pose risks to operational safety and efficiency. Even minor imbalances, which can arise from several underlying issues, require thorough diagnosis and proper balancing procedures to mitigate adverse effects.

    Imbalance in a fan typically occurs when there is a misalignment between the geometric center of the shaft and the center of mass. Factors contributing to fan imbalance include abrasive wear on blades, dirt accumulation, loose assembly, temperature fluctuations, loss of balancing weights, and deformation of blades. The higher the rotational speed of a fan, the greater the need for precise balancing to prevent hazardous vibrations. Operating an imbalanced fan can lead to numerous issues including increased energy consumption, heightened stress on the equipment, premature bearing failure, and unplanned downtime.

    Accordingly, balanced fans not only operate more efficiently but also produce less noise and extend the lifespan of bearings. For those managing new installations or maintaining older fans, prioritizing fan balancing is essential in industrial settings. It is essential to note that while fan imbalance is often the primary cause of increased vibration, other factors may also contribute, such as structural deficiencies, misaligned belt drives, and faulty bearings. Hence, it is imperative to engage experienced vibration diagnostic specialists to identify and rectify the root causes of vibration before undertaking balancing procedures.

    Experts indicate that many organizations seek balancing services only after observing an increase in vibration, but it is crucial to conduct prior diagnostic assessments. This involves checking for various deficiencies, including coupling connection defects or misalignment, which must be resolved prior to balancing. An effective case study illustrates this point. A client required fan balancing for a drying machine; however, initial vibration measurements revealed mechanical looseness. Subsequent investigations indicated damage to the support system attachment to the foundation. By rectifying this issue and reassessing the system, the residual imbalance was found to be within permissible limits, negating the need for balancing altogether. This case underscores the importance of ensuring that only technically sound machines undergo balancing.

    The procedures employed in fan balancing are designed to achieve the lowest possible residual imbalance with utmost precision. Typically, the balancing is conducted on-site utilizing the existing bearings of the fan, which minimizes equipment disassembly and avoids unnecessary disruptions. The goal is to adhere to balancing accuracy standards set forth by ISO 1940-1-2007, which relate to the class of equipment being serviced. The use of a portable balancing device and vibration analyzer, such as the Balanset-1A, allows for efficient and accurate balancing operations.

    The balancing operation incorporates a series of systematic steps. Depending on the manufacturer, the number and placement of sensors are determined, usually positioned on the fan shaft bearings and the housing. It is advisable that sensors be installed perpendicular to the rotor rotation axis to obtain the most accurate readings during the balancing process.

    The first step in the fan balancing process involves establishing a baseline for the initial vibration level. After this initial measurement, test weights are gradually added to determine how much weight is necessary to counteract the imbalance. The software integrated with balancing devices guides the technician through the process, detailing how to adjust weights on both the first and second planes of the fan's rotor. Throughout this procedure, the system actively checks and quantifies changes in both vibration and phase resulting from the balance adjustments.

    Once the technician determines the required correction weight and its angle, it is welded into place, and further tests are conducted to confirm the effectiveness of the adjustments. This meticulous attention to detail ensures that the fan's performance is optimized, drastically reducing vibrations and enhancing overall reliability in industrial applications.

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