www.bewet.fora.pl

loczytzn

Calculation of the steam hammer steam pipe

A calculation can be seen from Figure 8, the experimental values in good agreement with the calculated values, in addition to O. 4s ago period. In the 0.4s before the experimental and calculated values have a greater error can be calculated for the following explanation when considered in the single-phase gas, with adiabatic pipe flow friction formula set points along the tube when the normal pressure and velocity, and The reality is impossible to complete the experimental equipment base insulation, condensation flow process has generated, so the initial conditions of pressure and velocity distribution model with greater access, particularly near the pipe outlet, the greater the pressure distribution caused by differences in experimental and theoretical values have a greater deviation. To improve the insulation performance of experimental equipment, the station is expected to have a good kiss. After the experiment in the 0.4S with the calculated in good agreement,[link widoczny dla zalogowanych], indicating that the boundary condition formulation is reasonable. Assumptions used are reasonable. References [1] Crawford, M. JSantos, L, OvercomingSte'amHammerproMemsinHighPressureSteampipework, 5thInternationalConferenceonPressureSurg ~ September,[link widoczny dla zalogowanych], 1986 - [2] Safwat. H. H. AGeneralizedApplicationofthemethodofCh8ractertsfortheAualysisofTransientsinSteamtinesinnuclearpowerplants, FluidTransientsandAcoustlesinthePowerIndustry. presentedattheWinterAnn-ualmeetingoftheAE, December1978. [3] Yang Gui-ping, the second circuit of PWR power station steam edge of the transients of Section, Department of Mechanics, Tsinghua Imperial College Master's thesis, 1987. [4] of the party such as tin Qi, piston air compressor and pipeline vibration pulse, Xi'an Jiaotong University Press. [5] E. B. Huai-contracting, etc., transient ripple, China Water Power Press. 1983. Centrifugal radial seal from the calculation of tight parking Chengdu University of Science five by Liu Yi Duo I. Introduction vice impeller dynamic seals compatible with the proper sealing of parking is a complete dynamic sealing device shown in Figure 1, the driving force is the centrifugal sealing device , in which the pump impeller on the back and vice impeller blades, the work of the pump sealing elements, and centrifugal radial Keyless stopping the pump seals are sealing elements. Here, our concern is how this park is sealed and work effectively random, that is driving the pump, how to open parking seal is opened in Shiyao conditions? T need to open a little gap in the pump stopping, How Parking sealed closed? t close to what extent conditions closed} and so on. These issues on an experimental basis only through theoretical calculation and analysis, will it be possible to solve quantitative, well there is a centrifugal pump may stop the power ring sealing device 1 has blades; 2 Rong Ye Yan; 3. Ting car ring}; d. The necessary high performance liquid soil prediction to design a good \As we all know, when stopping the pump speed is fast and slow its a zero, and in the start of a slow its speed is zero change in a fast way. With this change in speed as the work of the pump impeller seal vice, speed from fast to slow in the process of gradual loss of function, and in speed from slow to fast is the process of gradually have an effect. we have the role of power loss or when the sealing speed as the critical speed parking sealed to n that . Obviously, when the pump starts the elbow, and its speed up to well above the n, the Deputy impeller sealing work will have a seal, face the same time, sealing the open parking space j when the pump stop,[link widoczny dla zalogowanych], the inertia speed is lower than n, the cut impeller Seal for the loss of role, while at the same time, parking will be hold in the stationary ring seal to form a parking seal., the bigger, more parking sealed poor working conditions, n, smaller parking sealed condition, the better. When n trend to zero, that is,[link widoczny dla zalogowanych], the pump will be stopped once the parking,[link widoczny dla zalogowanych], parking seal friction and wear through the line rarely hold j or if pump will soon be starting normal operation, parking is also immediately open the seal gap. Therefore, co-l Buried determine the critical speed n, is a research and design work of dynamic sealing a seal and a i9

相关的主题文章：

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]