Steam turbine daily question (with prizes for correct answers) (2009.02.01~20)
Thread Content
1. During the overhaul of steam turbines, why are some steam turbines inaccurate when measuring without removing the cover? (Note: The string quantity is the total string, not the thrust gap) This post was last written by zhangya * ong edited on 2009-2-18 17:41 ]
Is the channeling mentioned by the poster the thrust gap? If so, it is indeed inaccurate if it is not uncovered, because two watches are needed to measure the thrust clearance, one of which needs to be placed on a one-watt tile base to monitor the movement of the bearing seat, so this watch cannot be mounted without uncovering the cover.
The watch needs to be mounted on a one-tile tile base to monitor the movement of the bearing seat, so the watch cannot be mounted without removing the cover.
The bearing cover must be uncovered, and all thrust bearings must be removed when measuring the total number.
The meter should be placed on a one-watt tile base to monitor the movement of the bearing seat.
The watch needs to be mounted on a one-tile tile base to monitor the movement of the bearing seat, so the watch cannot be mounted without removing the cover.
The meter should be placed on a one-watt tile base to monitor the movement of the bearing seat.
When the cover is not opened, the shaft cannot move freely, and the oil film will also affect it.
There are requirements in the design of the steam turbine. What is the total string capacity, how much is it after installing the upper thrust tile, how much is it after installing the upper thrust tile gland, etc. Which one are you talking about? Without opening the upper cover, the biggest thing you have is the thrust gap! It has nothing to do with the total channeling you mentioned. Think about it, how can the total amount of leakage come out even if the lid is not opened?
It seems that centrifugal compressors and gas turbines can be measured without opening the cylinder. I have never seen bearing displacement measured.
It is possible to pull out the main string without removing the cover of the steam turbine, but only after removing the thrust bearing. Even if you sometimes dismantle the thrust bearing, you may not be able to get accurate serial measurements. Please analyze why?
It may be that the rotor, steam seal, stator blades, etc. are scaled, or the steam seal, blades, etc. are damaged and blocked, causing inaccurate shooting? There will also be a certain gap between the bearing bush and the bush seat. If its influence is not considered, will it be affected?