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Thermowell vibration of fluid-induced damage analysis


s), 187.98 (n / s),Beats By Dre Headphones, 523.59 (m / s) at the second,Salvatore Ferragamo outlet, three strikes-type in-line vibrations can not happen, the first group of type linear vibration is only possible in the process of moving flat f ] occurred. As the original line of vibration amplitude does not go into,herve leger toronto, and through time is short,herve leger skirts, so the impact does not fire. 4 to discuss a few special cases discussed above illustrate, the normal operation of the unit on when vortex shedding occurs as a result of thermowell vibration. The following discussion of several special thermocouple thermowell installation 4.1 hold into love with a certain angle in this case, the training should be considered in the towers with cylinder axis perpendicular to the flow velocity component. That U · sin of the thermowell and the angle to the flow rate to ask. In the teaching and training on the other, according to the same, to take = 45, c1I] vortex shedding frequency becomes f = S / D = SU · sin0 / D <Su / D, so the vortex shedding frequency is reduced. In general, this will help stagger the resonance danger zone. But thermowell {are also affected by the oblique angle of installation conditions, and other convection conditions, the more inclined not to say that the better. 4.2 or more thermocouples two states side by side in a far distance away from the operation and practice: side by side with the back of a thermocouple is often the first damage, and the high failure rate [1]. Overhead line conductors dancing in a similar situation [6]. This is because the first vortex formed on the thermowell, a second thermocouple before increasing fluid turbulence level, may lead to unstable or turbulent fluid elastic vibration, thus resulting in excessive vibration. Figure 1I, respectively, in Figure 2 shows a single cylinder and double cylinder wake coupled spectrum [6]. It can be seen, when a column in another column down the flow of the r], the fraud who Sichuan force _ an increase of approximately eight peers. 5 sets of police to prevent the thermocouple measures to break through the above discussion, we know: the role of store I% mm in diameter, single vertical force on the cylinder Phoenix ittt6llf, ~ iiil density power (P, S, D) as a function of frequency, wind speed V = 2.8m / s · 65 · 2 acting on the angular diameter of the Phoenix Zhu 96n off throw into confusion on the vertical force spectrum, the diameter of the cylinder placed in a separate report of 96 cylindrical Xing Xiu song soap paralysis, the spectrum density power (P.S.D) to teach the West three-song rate (V = 2.Sm / s) a · increase structural damping can reduce the vibration amplitude. By contact with fluid too Thermowell part of the quality of feasible solution. b 'increasing tube diameter, reducing the tube diameter can increase the moment of inertia, the structure also increased the natural frequency, resonance can stagger the danger zone. 'Co bend pipe installation position stagger, It! Ti'1, near the throttle plate to prevent the speed of perturbation, causing a vibration mode of vibration. d · change the shape of a cross-sectional surface of the casing can be processed into a streamlined, so that the fluid does not produce vortex shedding phenomenon. e · Xiecha way to reduce the use of facilities vortex shedding frequency, but also has the potential to vortex shedding frequency is close to the tube natural frequency glycosides. Therefore, this usage must be cautious. f, i reduce the length of casing pipe can effectively improve the natural frequency and increase casing strength. g · after the installation of the vortex in the thermowell interference device so that the amount of scattered small boat off the body of the vortex to a wider frequency band, thereby reducing the flow around a cylinder of tender vibration force. Interference device So, what shape, needs to continue to explore. h ·-installed with the thermocouple should stagger the delivery of the break away, try not arranged in a straight line. 6 Conclusion. , Induced by engine vibration can cause galvanic thermowell tube damage. Shorten the length of casing can be used to change the shape of the casing, the method by reducing the diameter of the casing so the casing vibration. References [13 sets in l965 and then electrical engineering work in rice pest plants Nam Yuan wooden tables and automated learning disc anthology discuss China Industry Press [2] preserves the amount of text. Smelly house sound, has civilization. Harm the central engineering summer Zhan Mu. 1988 (3] R, D, body blast induced vibration from Rong Lixin Machinery Industry Press, 1983 [4] Feng Ding branch. Engineering from the emblem of perturbation Manual, ,],[. Yan said the main tidal power plant arm of the discussion of strong components Hao orange 3 [8] Qian port sauce primary lotus. More articles related to topics：


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