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 Wysłany: Pią 1:21, 17 Gru 2010 Temat postu: ugg stivali Thermal Fluid Power wedge mechanical s |
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Thermal Fluid Power wedge mechanical seal performance parameters of the approximate calculation
\follow the x-x cross-section distribution, the corresponding surface pressure coefficient K; and only consider the static effect of the surface pressure distribution were followed-side Y-Y cross-section distribution, the corresponding surface pressure coefficient calculated for the K ... 3 Examples and results of analysis of a methanol plant saturation tower feed pump (high temperature, high pressure return pump a wedge with a hot fluid dynamic mechanical seal ring structure shown in Figure 4, a stationary ring diameter D. 61ram, outer diameter Do ~ 74mm, shaft diameter = 64.5mm, Gunn sent to the media for the hot water. pump operating temperature is 212 ℃, sealed inside the medium pressure 5.30MPa (g). try to draw out one by one K? ', curve, and the judge?', = 433.2K stability when the sealing (flush volume Q, = 18L/min). by the given conditions, we can obtain A = 93.588mm. from (11 ~ (31 can be obtained respectively: A, = 1284 .8 ramI also = 939.80ram; B = A/Ar-O.7315. Based on the above given conditions, application development, computer programs can be obtained by sealing the average temperature inside the medium of a 130 ~ 200X2 T when the surface pressure coefficient, Table 2. Table 2 shows that, if the mask pressure seal end section at x-x No. 6 25 27 Distribution of the distribution of fluid machinery, to seal the working conditions are very strict requirements, which requires large amount of flushing fluid and the temperature is low. Otherwise, when the sealed box media (or end) the average temperature is still at a low value, will be mistaken for open sealing surface, a seal failure. If the seal end surface pressure as shown by Y-Y cross-section law distribution, then the stability criterion K sealing small, sealed box that the media (or end) of the average temperature has reached the end of limit, the sealing surface has actually opened. slotted ring mechanical seal ring 4 field test showed that the When TL> 18O ℃,[link widoczny dla zalogowanych], the seal started a serious leak, then you can end that has been opened, Kwame T. = 180 ℃ when the seal faces to minimize the ratio of pressure than the pressure, under the assumption holds: K + K,[link widoczny dla zalogowanych], (1 a W) a B (15) where - weighting coefficient of surface pressure in Figure 5. and end the relationship between the average temperature of P. c o.1Ol3MPa, Po_5.30MPa, day = 0.7315 ... · ...-XI - X-F A * an X was calculated from Table 2 for a O.2365. the value in Figure 4 with the slot area of the slotted circular area ratio of the whole area is very close to 0.218. The hot fluid power actually worked wedge mechanical seal, seal Central heating is uneven,[link widoczny dla zalogowanych], so that the flatness of the sealing surface of the destruction and the formation of convergent gap region, so the leakage is large compared with the parallel seal, and the temperature distribution below the parallel end face mechanical seal [. Therefore, parallel plane model obtained by the weighted coefficient is safer, and users in the use of the method, the weighted coefficient of fully desirable area of the slotted trough area ratio of the area. Table 2 Yong pressure coefficient r,[link widoczny dla zalogowanych], (C) 13014015016017018019O200 | ℃ 176.7184.0l91.4199.1207.12152223.6232.3.0.77480.78030.79230.803208l5808300O.845808632.0.6040061840.6347O65400.67610.70100.729107600 a 064440.657206719O.68930.7091O .73150.75670.7844 solid line in Figure 5 describes the flushing volume Q, = 18L/mln,[link widoczny dla zalogowanych], the sealing surface between the weighted average surface pressure coefficients K ~ n and end the relationship between the average temperature. This curve is universal, that is, sealed for the same volume and different in different irrigation fluid temperature conditions. known by the curve, when TI = 433.2K, the sealing liquid in a relatively stable areas like the work. Field tests also showed that when n a 433. 2K, the sealing of the leak is very small, very stable job. 4 Conclusion Using the proposed method can better calculate the thermal fluid dynamic wedge mechanical seal performance parameters; computer program developed in this paper is to draw a given process K ~ A under the 'curve, the average temperature through the end measured to determine the stability of sealing work. The practical results show that the proposed method and phase calculation method is reasonable and practical judgments. (continued on 23 page)
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