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Should pay attention to the quality of the installation of centrifugal fan


They choose. Fifth, with the coupling device to replace the paper machine from the homes tend to use the motor drive shaft,[link widoczny dla zalogowanych], clutch segment started. When the clutch is damaged, replace the clutch. However, I have found that some people have actually replaced the clutch with the coupling. This changed with the load of the motor to start the long run, the motor will be too big to fail because the current. Therefore, instead of using the clutch coupling the practice should be prohibited. 3l · sweet double white boring quality professionals) made; gas liner impact on the transparency of the value of the blue-Freeman Group Shenyang (314000) t_ --- a transparency tracing paper, translucent paper, like the main indicators of the paper. Although, transparency and opacity are reflected in the light of paper degree, but the tests are different, the national standard GB1543 - 88 (instead of GB1543-79) in the test shall not transparent, is based on paper backing (thickness to be with the thickness of the reflection factor to the increase is no longer improved) measured green R, then the black test tube is green backing layer of paper, then, according to opacity: R0 / R × 100% of the formula to calculate the opacity value. But when the paper backing of the thickness less than the above requirements, the paper more transparent, the opacity of the test more difficult. Therefore, the provisions of the national standard GB2679.1-8l transparency test, based on reflection was 84 ± 1% of the standard white board as a backing test, and then the black cartridge for the backing layer of paper measuring R0, then, according to Transparency: (a fi0) / Ei0 × 100% of the formula to calculate the transparency value. Since the standards are at ZBD type whiteness meter for testing equipment and developing, so the provisions of the test with a Blu-ray transparency, reflectivity liner 84 ± 1% is Blu-ray reflectivity. The standard has not been replaced, while tracing the national standard GB1468 - 87 in the specified transparent green SBD required determination of the test, apparently GB2679.1-8l standards have lagged behind. The new green law is also developing testing standards for transparency, the liner reflectivity needs further study. Recently, Hangzhou light through instrument development produced _Z-48B (d / o) type of whiteness meter manual, the requirements of liner for the green light reflectivity (R) 844-2%. A collection of the experimental: 84 ± 2% of the liner will normally take orders, supply of equipment is not necessary, once lost, change the value, it is difficult in a timely manner a break of 70 required under s77 liner together. In addition, the transparency of the development of new testing standards to provide some data. Specifically from the company's various models of the plant about two dozen units of various types of white whiteness meter, the carefully selected three types (plastic light panels, glazed ceramic plates, ceramic light panels) = 70-90% The fourteen white as the transparency of the liner test were used to SBD-and Z - 48B (d / o) was measured three greenish pattern tracing paper, some of the data accumulated in Table. According to table mapping. 2 conclusions can be seen from the figure: 2.1 R value increased with the liner, the transparency value also increased, both directly proportional. 2.2SBD type of test values of transparency, one by one than the Y 48B (d / o) based on average about 2% lower, which is SBD-type and Y ■ r-_48B (d / o) type of optical characteristics of different causes, So the original type with SBD lining R: 84 ± 1% test value and the transparency of board with the YQ-z a 48B (d / o) R = 77,[link widoczny dla zalogowanych],5% type lining around the transparency of the test board were comparable. 2.3 in the three types of ceramic liner in the light panel test value, than the other two board test value by around 1% lower. Plastic light panels and ceramic glazed plate test value for the former than the latter type SBD height of about 0.5%, while the Y a z-48B (d / O) types are basically similar to the other, ceramic light panels easy to dirty, variable value, followed by plastic light panels, glazed ceramic plate is not easy but dirty and difficult to change the value, is more suitable for the backing. Pattern No. 2,41 0,[link widoczny dla zalogowanych],37,2 number of linear slope of the linear slope pattern O. 34,3 slope of the line pattern number as high-speed rotation of the impeller and casing fixed to the snail-like progress of smell gap between wind 12I H, inevitably produced a return air flow Qx, it asked the gap area and the air pressure proportional, usually Q) 【amount of micro-negligible. (See Figure 1) but the machine is installed in the 3-4mm gap axial asked lightly fitted into the radial H and expanded to 20mm, causing back flow, Q) 【straight up (see Figure 2), the nature and requirements the amount of wind pressure and wind can be seen far away, the fan selection important, the installation location and accuracy is more important; always has two road crossings mechanical ventilation,[link widoczny dla zalogowanych], is the engineering and technical personnel responsibilities. 1, 1998 \ More articles related to topics：


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