The differences between the upper rotor and the brake of a hydrogenerator are as follows. The main purpose of lifting the rotor before starting the turbine is to establish an oil film between the thrust tiles and the mirror plate to prevent dry friction between the two, resulting in burning of the tiles.
1. When the hydro-generator unit is stopped, the brake is applied when the speed drops to 30% of the rated speed. Usually the unit uses an air brake and some small units use electric braking. .
How to scrape the tiles of a hydraulic generator
The working surface and non-working surface of the feed water pump push tile have the following differences:
p>1. The working surface faces the generator, the pump inlet pipe is at the transmission end, the pump outlet pipe is at the free end, the thrust bearingis at the end of the free end and the axial thrust direction of the pump is from the free end to the transmission end.
2. The non-working surface faces the machine head.
Are steam turbine thrusters and thrust tiles the same thing?
When scraping push tiles, the first step is rough scraping. Typically, a wide flat scraper is used to scrape high spots over a large area. After several scrapings, the surface of the tiles will be uniform. and a smooth contact state. Then proceed with fine scraping. When scraping finely, use a spring scraper to scrape in sequence according to the contact situation. The knife marks should be clear and the patterns of both scrapings should be approximately vertical. Every time you scrape, you should scrape all the biggest and brightest spots, open the contact pointsmedium and leave the small dots temporarily intact. This will cause the large dots to be split into multiple smaller dots, and the smaller dots will be. will become large dots and small dots will appear without any dots. Generally, the contact points on the tile surface should be 1-3 points/cm2. When the contact point meets the requirements, the oil inlet edge can be cut according to the drawing, and the edge without oil inlet can be scraped and chamfered. Are you satisfied with the response?
Thrusts and thrust shoes on steam turbines are the same thing.
The thrust plate establishes the dead center of rotor expansion, ensuring that the axial clearance between the moving and static parts is within the design range. It is widely used in steam turbines, hydraulic turbines, water pumps, etc. The function of the turbine thrust shoe is to determine the posiaxial position of the rotor in the cylinder.
Thrust pads are generally composed of two thrust washers or several thrust washers and several rolling elements. Generally, thrust washers are divided into shaft parts and seat parts. Rolling elements are generally the most common type. consisting of an iron or copper cage as a whole.
Detailed information
Material used for push tiles:
Billet steel + Babbitt alloy (also called black gold ), with black gold It can melt when the shaft temperature reaches about 110 degrees, increasing the moving space of the large shaft, thereby protecting the large shaft and preventing dry friction of the thrust caused by large axial displacement of the big tree. Next comes tin bronze and billet steel + fluoroplastic (this material has a low coefficient of friction, is suitable for temperahigher tures, does not need to scrape the tiles and will not burn the tiles due to oil cutting), etc.
Baidu Encyclopedia Push Tile