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Fault diagnosis technology for rotating equipment

2020-10-29View Original

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Fault diagnosis technology for rotating equipment – Implementation plan for monitoring the condition of factory equipment. HOJOLO: http://5b0988e595225.cdn.sohucs.com/images/20180816/9bf2fc2c0031442d95c3a3cdc2d7f9e6.png http://5b0988e595225.cdn.sohucs.com/images/20180816/28853e5bbbb3481a902aa4aaa37dc0d1.jpeg There is a process of development as equipment goes from a normal state to a faulty state; therefore, it is necessary to conduct regular, continuous, and standardized inspections and measurements of the equipment’s operating conditions. This is what is known as condition monitoring, and it is part of equipment management. There are three main categories of maintenance methods, which include five different forms: reactive maintenance (BM), corrective maintenance (CM), preventive maintenance (PM), condition-based maintenance (CBM), and scheduled/regular maintenance (TBM). Hanjilong offers condition monitoring services, including vibration analysis, ultrasonic leak detection, infrared thermal imaging, on-site dynamic balancing, laser spindle alignment, oil analysis, online monitoring systems, as well as condition monitoring technology transfer and outsourced condition monitoring services. Vibration detection involves using vibration sensors to obtain information about the vibrations of mechanical equipment. It is the most convenient, reliable, and effective technique among all non-destructive testing methods for diagnosing mechanical faults. Condition monitoring and fault diagnosis of equipment involves quantitatively assessing the operating condition of machinery while it is in use, or with minimal disassembly of its structural components. By processing and analyzing the measured signals, along with considering the historical performance of the equipment, it is possible to identify the location and cause of faults, thereby determining the appropriate maintenance strategies and the most suitable time for repairs. VAST-CM-21: Vibration point inspection instrument; bearing condition detector for measuring vibration (velocity, acceleration, displacement), temperature, rotation speed; it can also determine bearing condition values using the peak-factor method, and has a function for storing bearing auscultation data. The Vibro vibration analysis software allows for the creation of measurement routes and the setting of warning values. The various available bandpass filters, the HOJOLO-V1 multi-functional vibration analysis camera – the HOJOLO-V1 vibration camera inspector – is an instrument used to measure mechanical vibrations. It is a comprehensive instrument that primarily measures various parameters of mechanical equipment, including bearing speed, acceleration, displacement, bearing condition, abnormality alerts, equipment rotation speed, infrared temperature measurement, as well as bearing auscultation, and it also performs automatic spectral analysis. And an MCP (Mechanical Equipment Operation Status Chart) is generated based on the measurement data; all measurement values can be indicated by alerts in green, yellow, orange, or red colors, eliminating the need for manual judgment. VAST-DC-23, an advanced spectrum analysis instrument, provides tools for vibration analysis, as well as measurements of velocity, acceleration, displacement, and envelope vibration. It also offers Bird’s diagram, 3D waterfall diagrams, axis trajectory analysis, phase analysis, and 3D ODS mode analysis. A dual-channel measurement mode is available for analyzing start-up and stop-up processes. The instrument features a million-line resolution and a large database of bearing characteristic frequencies. It comes equipped with an expert-level predictive diagnosis system. The Leksut LKS1000 is a visual leak detection instrument – during its mobile scanning process, once a leak signal is detected by the sensors, it is displayed on a color LCD screen. The source of leakage on the LCD screen is visible in real time as yellow (indicating low leakage and a weak signal) or red (indicating high leakage and a strong signal). At the same time, the horizontal light bars at the bottom of the LCD screen display different colors and values. Scope: ● Leak detection in compressed gas, oxygen, nitrogen, and steam trap systems (all types of gas leaks can be detected) ● Detection of negative pressure leaks in vacuum systems, valve issues, as well as leaks in heat exchangers, boilers, and condensers ● Detection of partial discharges caused by electrical arcing or high-voltage insulator defects ● Airtightness/seal integrity testing (e.g., for intercity trains, aircraft, aviation equipment, submarines, cars, etc.) ● Predictive maintenance inspections for defective bearings, gearboxes, and other components in mechanical systems ● Functions such as visual imaging, remote temperature measurement, and bearing inspection via acoustic analysis. The ZS6510 Steam Trap Fault Detector and the ZS6510II Trap Detector provide inspectors with an “internal view” of steam traps, converting high-frequency ultrasonic noises into audible audio signals. The inspector will not be disturbed by ambient noise from downstream, allowing them to easily determine whether the steam trap is leaking or blocked. The instrument is equipped with a built-in contactless infrared temperature sensor; together with temperature measurements of the pipes upstream and downstream of the trap, it can usually make an accurate determination of any faults in the trap. The Detek infrared thermal imager uses an infrared detector and an optical imaging lens to capture the pattern of infrared radiation energy distribution from the object being measured, which is then reflected onto the photosensitive elements of the infrared detector; this results in an infrared thermal image that corresponds to the heat distribution pattern on the surface of the object. In simple terms, an infrared thermal imager converts the invisible infrared energy emitted by objects into visible thermal images. The different colors on the thermal image represent the varying temperatures of the object being measured. Infrared thermography is applied to: electrical equipment such as motors, transformers, switch stations/nodes, and cable insulation; machinery such as bearings and couplings; pipelines for insulation and leak detection; metallurgical furnaces and kilns; chemical reaction towers, and so on. Poor dynamic balance or malfunctions in such equipment usually refer to abnormal vibrations that occur when the mass of the rotor components of rotating machinery is offset relative to the axis of the rotating shaft. When it is determined that the cause of the excessive vibration is rotor imbalance, and site conditions permit, the issue of vibration can be resolved more economically and effectively by using on-site dynamic balancing. Furthermore, shaft misalignment also increases machine vibration and wear, raises energy consumption, leads to failures in bearings, seals, and even couplings, and shortens the mechanical lifespan. A laser alignment device can help extend the machine’s lifespan, improve accuracy during operation, and enhance work efficiency. In the unplanned shutdowns of rotating equipment, over 70% are caused by shaft misalignment. These unplanned shutdowns led to increased maintenance costs and production losses. Oil sample analysis is used to determine the condition of machinery related to lubrication or lubrication systems, covering three aspects: the condition of the lubricating oil, the condition of the lubrication system, and the condition of the machinery itself. By analyzing the abrasive particles in the lubricant, it is possible to qualitatively and quantitatively assess machine wear and detect potential machine failures at an early stage. Regular analysis of oil samples can also help identify and correct unreasonable maintenance practices*, as well as monitor the lifespan of the oil. It can better guide the appropriate timing for oil replacement, helping to reduce a company’s oil consumption costs. It features vibration monitoring and automatic protection functions for multi-channel synchronous continuous online monitoring network systems, and supports synchronous data acquisition modules for 1 to 64 channels. Product design is based on the modular principle of the Vibration Monitor VM-21. This system starts with simple monitoring or automatic control of vibration measurement channels, and ends with complex multi-channel systems for emergency protection and equipment condition monitoring. Vibration, temperature, and rotational speed can provide warnings before a fault occurs, with color-based alarms and relay activation. The capabilities of an online automatic diagnostic system. Convert the preset vibration measurement range into a 4 ... 20 mA DC output signal. Fully outsourcing contract-based equipment maintenance is suitable for companies with a small workforce that achieve good efficiency and can focus their main efforts on their core business. Purchase professional services to achieve a high level of professionalism in the project, and quickly obtain the benefits and advantages of predictive maintenance. https://5b0988e595225.cdn.sohucs.com/images/20180816/ae1aa721d2034877b4f91cddeb04e45c.jpeg The services cover the entire process of implementing predictive maintenance effectively: determination of the objectives, scope, levels, and instruments for predictive maintenance techniques and management training; establishment of technologies, standards, and monitoring frequencies; creation of databases; collection and evaluation of baseline data; as well as regular data collection and evaluation

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