question 1. What are the requirements for the installation of condenser ?
Question 2: What are the requirements for wheel center alignment of the shaft system?
Question 1 Reference:
(1) Installation and connection of the condenser shell. The support method is usually in the form of a spring support located on the basis of the condenser.
(2) Installation of internal equipment components of the condenser. Including the installation and connection of tube sheet and partition cooling tube bundle. After the condenser is assembled, the steam side should be filled with water. The watering height should be 100mm below the steam seal depression, and there should be no leakage for 24 hours. The condenser that is already in place on the spring support should be temporarily supported before the water filling test. After the irrigation test is completed, the water should be drained promptly.
Question 2 Reference:
(1) Alignment of the wheel center of the shaft system, mainly for the center of the high and medium pressure wheel center, the center of the medium and low pressure wheel, the center of the low pressure wheel and the low pressure rotor, generator rotor wheel center just.
(2) When aligning the wheel center of the shaft system, ① the low-pressure rotor should be used as the benchmark; ② the wheel center alignment is usually adjusted by filling the full cylinder and condenser with water to simulate operating conditions; ③ aligning the wheel There must be reserved values for the opening and height difference when finding the center; ④ Multiple rechecks and corrections of the wheel center must be made at different stages.
The shafting center alignment needs to be carried out multiple times, ① the initial alignment of the shafting; ② the re-alignment after the condenser is filled with water to the operating weight; ③ the re-alignment before the cylinder cover is buckled; ④ the re-alignment before the secondary grouting of the foundation; ⑤ Re-alignment after the second grouting of the cylinder; ⑥Re-alignment when the shafting is connected; ⑦Except for the first initial search, all shafting center alignment work is carried out when the condenser is filled with water to the operating weight.
