Organic Anti Beat Box Band

defgf83tu

Turbine control valve opening deviation of bearing pressure on the relationship between temperature and Experimental Film

3; U ・ f) / (Cf ・ Q ・ D ・ B) (2) where: △ ? eleven bearing temperature, ℃ P one by one bearing loads, Ⅳ p - than the pressure of a bearing, that is equivalent to the bearing film pressure, P = P / D ・ B, PaD, B-A are the diameter and width of the bearing, ITIu one by one journal of the circular speed, m / s produced a - friction coefficient,[link widoczny dla zalogowanych], c the specific heat of oil one by one , J / (kg ・ ℃) y one by one oil density, kg / m] O one by one the flow of oil, / s from (2) can be seen, bearing temperature rise △ f acting on the bearing on the Bearing load P or the ratio of pressure P is proportional. The type I. 2) into (1), are: △ day. : At = (P ・ U. F) / (C ・ y ・ Q) = (P'U ・ l plant j / (C ・・ Q ・ D'B) (3) Thermal Power Project 2OO2 formal (3) is Through this experiment, combined with the lubrication theory, deduced the conclusion that the turbine control valve opening the greater the difference, 1, the greater the load bearing, bearing the higher the temperature, the higher the bearing oil film pressure The turbine control valve opening deviation Why would affect the bearing loads, you can steam machine theory combined with theoretical mechanics, mechanics of materials related to principles of proof, this is not scope of this article. 4 with the test results to solve the turbine bearing temperature high problem instances for Huaneng Shantou Power Plant No. 1 turbine 1, bearing high temperature problem, according to equation (2) can adjust the steam turbine bearing center height to reduce the bearing load P, or increase the bearing width D, or increase the bearing length of the mouth, or raise the bearing surface finish and precision to reduce the friction coefficient r, or increase the bearing lubricating oil and density of the specific heat C 9 y and flow reduction and other methods to achieve the purpose of bearing temperature rise △ f. But these improvements need to change the turbine involves the installation of the original condition, or new bearings need to be replaced, or need to change the oil types and oil transportation equipment, heavy workload and long duration, cost more. and according to the results of this trial concluded that equation (1) or type (3) can not take the above method,[link widoczny dla zalogowanych], and is simply to reduce the steam turbine 3, 4, valve opening difference between the △ H method. Specifically: the original 3, the first open, then open the control valve 4 to open the order after the first opening 4 open 3. According to the article has also defined △ H = I, then 4, to adjust the valve opening is always greater than 3, adjust the valve opening, and its poor opening, SH is negative, then reached reduce the difference between the 3.4 purpose of regulating valve to open here the improved method, the unit is running more than a year, No. 1 steam turbine bearing temperature from 92 ℃ to 65 ℃, declined steadily. bearing vibration changes little, and no the case of film shock occurs. The actual description of valve opening by changing the method of difference to solve the No. 1 bearing turbine high temperature problem, you can receive a quick, inexpensive, long-term stable operation with good results. by reducing regulation poor valve opening reduced the load of the turbine bearing, the bearing oil film pressure drop, film thickness increased. When the film thickness increases to a certain extent, the film will be unstable,[link widoczny dla zalogowanych], there is the possibility of shock produced film. Therefore, for the specific unit and words, must pass tests to determine the specific program. References: [j Qiao Xiao-Chun, Niu technetium pass. Xin Chen Nan Machine Design [M], Xi'an: Xi'an Jiaotong University Press. I986. (Hui editor) - A ... a gear transmission of a ~ - ... a Norwegian frigate in the Maag gear drives, according to \A 310 frigate 5 sets of gear box supply system. These frigates will be equipped with CODAG (diesel fuel and trucks to use the joint) high power devices and low-noise design Maag gear box. The first set of gear box scheme delivery in late 2002, followed by 2OO6 year until delivery of a year. each MaagCODAG 2 sets of gear box will be connected to ZAR-Bmvo12 diesel engine,[link widoczny dla zalogowanych], l Taiwan GELM2500 gas turbines. In CODAG operation mode, the propeller speed in 190r/min the total propulsion system power 305OOkW . gear box is installed on a specially designed elastic support, so that the transfer to the water to minimize the noise. In view of Maag gear box with high reliability,[link widoczny dla zalogowanych], flexibility of function, the noise radiation is small, it is very suitable for naval vessels propulsion system. think Juan feed)
More articles related to topics：

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]