The quality of acoustic monitoring is very much dependent on the background noise of the environment in which the machine is operated. Some attempts to create condition-monitoring methods based on acoustic analysis were made in the past (Refs. 1-4). Recently, acoustic analysis has attracted more and more attention, and has been applied in many
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Mar 10, 2021 · Sometimes the no-load test is normal but not working properly. It may be that the internal sound energy components such as ultrasonic molds have changed, causing the sound energy to be transmitted poorly. Here is a relatively simple judgment method: hand touch method.
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In addition, this paper only carries out the two-state analysis for each node (i.e., occurrence of 1 and no occurrence of 0), when the loader fault probability is analyzed. 3.2. Parameter Modeling of Bayesian Network for Loader Fault Diagnosis 3.2.1. Establishing Prior Probability (1) Determine the Evaluation Level. Expert judgment is one of
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Oct 26, 2020 · Even if there is slight damage such as peeling, abnormal noise and abnormal noise will be emitted. Regular tone. Through the analysis of these sounds, it can be used as one of the basis for judging whether the bearing is running well. In addition, the judgment of some performance conditions requires the use of related testing tools.
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Apr 28, 2021 · This phenomenon can also occur when there are spikes or abnormal waveforms on the sine wave. At this time, you can replace it with another whole ultrasonic energy component for judgment. 4. No-load test is abnormal: Firstly, observe whether the ultrasonic mold has cracks and whether it …
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Mar 29, 2021 · 4. Trouble phenomenon: The engine is unstable, and there are often "sudden and sudden" noises. When the oil is increased, the engine will have insufficient driving force, and sometimes there will be "Peng, Peng" similar to the sound of a gun., The exhaust pipe will show black smoke from the exhaust pipe. Failure judgment: true failure.
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The load will be short circuited. Ground or earth faults: This kind of faults occurs when the insulation of the cable gets damaged. This test is carried out with the help of a sound cable that has no fault running along the faulty cable as shown below. The fault point distance can be given as: Where. V 1 and V 2 = the voltmeter readings at
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May 10, 2018 · • Electrical fault • Faulty compression or injector • Engine runs on 5 cylinders • Abnormal sound • Reduced performance • Check that the injector cables. are not damaged • Check that the injector connections. are not damaged • Check fuel supply pressure • Check the valve clearance • Do a compression test and. check cylinder #1
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So this fault rarely occurs, although it is the harsh kind of fault that holds the largest current. So this current is used to determine the rating of the CB. L – L – L – G Fault. The 3-phase L – G fault mainly comprises all the 3- phase of the system. This fault mainly occurs among the 3-phases as well as the ground terminal of the system.
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Sometimes there will be no load test normal, and can not work normally, it may be the ultrasonic mold and other original changes in the internal sound energy, resulting in poor transmission of sound energy, here is a relatively simple judgment method: hand touch method.
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Analysis And Judgment Of The Cause Of Engine Crankshaft Ablation Jun 18, 2018. The core hints: the cause analysis and judgment of engine crankshaft ablation: when the crankshaft is ablated, the diesel engine will take the white smoke, send out the metal impact noise, even cause the crankshaft and the axle bush to lock together, and can not rotate.
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When the ultrasonic generator is abnormal, it can also produce the same situation, because normally the input waveform of the transducer should be the smooth sine wave, when the sine wave has a sharp peak or abnormal waveform, it can also produce this phenomenon, then it can be replaced by another whole branch sound energy element to distinguish.
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Nov 30, 2011 · 2. Bearing noise . The rolling bearing in the work to allow a slight operation noise, if excessive noise or abnormal noise or crash, indicates that a fault bearing. The cause of the rolling bearing produce noise is more complicated, one is bearing inner and outer surface with wear.
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3.the abnormal sound during the operation of the bearing. The control of the spindle precision of the transformer winding machine has always been a major assembly work. The assembly clearance should be strictly controlled during the process of replacing the bearing. High-level bearings should be used as much as possible.
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Analysis And Judgment Of The Cause Of Engine Crankshaft Ablation Jun 18, 2018. The core hints: the cause analysis and judgment of engine crankshaft ablation: when the crankshaft is ablated, the diesel engine will take the white smoke, send out the metal impact noise, even cause the crankshaft and the axle bush to lock together, and can not rotate.
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Fault diagnosis: When this fault occurs, check the following steps. ① First check that the wire connections in the charging system are reliable. ② Second, check whether the belt is loose. The judgment method can be used for the middle point of the thumb pressure transmission belt, and the deflection is about 10mm.
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Nov 28, 2018 · Abnormal sound . When the transformer is in normal operation, it will emit a continuous and even "click" sound. If the generated sound is uneven or there are other special sounds, it should be regarded as abnormal operation of the transformer, and the fault can be found according to the sound and processed in time.
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(For element fault judgment, refer to the Module Application Manual, chapter 4, item 2 "Fault Judgment Abnormal load Control PCB fault Input signal circuit fault Control PCB fault Insufficient tightening torque noise current flows into the IPM control
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The invention discloses a system for identifying typical faults of a transformer based on sound of the transformer, which comprises a sound acquisition module, a sound processing module, a database, a comparison and judgment module, a result output module and a central processing unit, wherein the output end of the sound acquisition module is connected with the sound processing module, the
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Fault diagnosis: When this fault occurs, check the following steps. ① First check that the wire connections in the charging system are reliable. ② Second, check whether the belt is loose. The judgment method can be used for the middle point of the thumb pressure transmission belt, and …
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