One Question per Day 20181228
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What are the signs of water hammer in a turbine? ①The main and reheat steam temperatures drop by 50°C or more within 10 minutes. ②Main steam valve flange, cylinder joint surface, control valve stem; white steam appears or water droplets splash at the shaft seal. ③The steam pipeline has water hammer noise and intense vibration. ④As the load decreases, the sound of the turbine becomes deeper and the vibration of the unit increases. ⑤As the axial displacement increases, the temperature of the thrust pads rises, and the differential expansion decreases or becomes negative.
① The steam inlet temperature drops sharply； ② White wet steam emerges or water droplets splash out from the steam pipe flanges, the stem of the main steam valve and the throttle valve, the shaft seals, and the cylinder joint surfaces ； ③ A water hammer sound can be clearly heard inside the pipe ； ④ Axial displacement increases ； ⑤ Increase in thrust bearing temperature ； ⑥ The vibration of the unit is gradually intensifying ； ⑦ Metallic noises and impacts are coming from inside the unit ； ⑧ During grid-connected operation, the load decreases ； ⑨ The speed of the machine decreases during operation.
① The steam inlet temperature drops sharply； ② White wet steam emerges or water droplets splash out from the steam pipe flanges, the stem of the main steam valve and the throttle valve, the shaft seals, and the cylinder joint surfaces ； ③ A water hammer sound can be clearly heard inside the pipe ； ④ Axial displacement increases ； ⑤ Increase in thrust bearing temperature ； ⑥ The vibration of the unit is gradually intensifying ； ⑦ Metallic noises and impacts are coming from inside the unit ； ⑧ During grid-connected operation, the load decreases ； ⑨ The speed of the machine decreases during operation.
①The main and reheat steam temperatures drop by 50°C or more within 10 minutes. ②Main steam valve flange, cylinder joint surface, control valve stem; white steam appears or water droplets splash at the shaft seal. ③The steam pipeline has water hammer noise and intense vibration. ④As the load decreases, the sound of the turbine becomes deeper and the vibration of the unit increases. ⑤As the axial displacement increases, the temperature of the thrust pads rises, and the differential expansion decreases or becomes negative.
① The steam inlet temperature drops sharply； ② White wet steam emerges or water droplets splash out from the steam pipe flanges, the stem of the main steam valve and the throttle valve, the shaft seals, and the cylinder joint surfaces ； ③ A water hammer sound can be clearly heard inside the pipe ； ④ Axial displacement increases ； ⑤ Increase in thrust bearing temperature ； ⑥ The vibration of the unit is gradually intensifying ； ⑦ Metallic noises and impacts are coming from inside the unit ； ⑧ During grid-connected operation, the load decreases ； ⑨ The speed of the machine decreases during operation.
① The steam inlet temperature drops sharply； ② White wet steam emerges or water droplets splash out from the steam pipe flanges, the stem of the main steam valve and the throttle valve, the shaft seals, and the cylinder joint surfaces ； ③ A water hammer sound can be clearly heard inside the pipe ； ④ Axial displacement increases ； ⑤ Increase in thrust bearing temperature ； ⑥ The vibration of the unit is gradually intensifying ； ⑦ Metallic noises and impacts are coming from inside the unit ； ⑧ During grid-connected operation, the load decreases ； ⑨ The speed of the machine decreases during operation.
① The steam inlet temperature drops sharply； ② White wet steam emerges or water droplets splash out from the steam pipe flanges, the stem of the main steam valve and the throttle valve, the shaft seals, and the cylinder joint surfaces ； ③ A water hammer sound can be clearly heard inside the pipe ； ④ Axial displacement increases ； ⑤ Increase in thrust bearing temperature ； ⑥ The vibration of the unit is gradually intensifying ； ⑦ Metallic noises and impacts are coming from inside the unit ； ⑧ During grid-connected operation, the load decreases ； ⑨ The speed of the machine decreases during operation.
① The steam inlet temperature drops sharply； ② White wet steam emerges or water droplets splash out from the steam pipe flanges, the stem of the main steam valve and the throttle valve, the shaft seals, and the cylinder joint surfaces ； ③ A water hammer sound can be clearly heard inside the pipe ； ④ Axial displacement increases ； ⑤ Increase in thrust bearing temperature ； ⑥ The vibration of the unit is gradually intensifying ； ⑦ Metallic noises and impacts are coming from inside the unit ； ⑧ During grid-connected operation, the load decreases ； ⑨ The speed of the machine decreases during operation.
① The steam inlet temperature drops sharply； ② White wet steam emerges or water droplets splash out from the steam pipe flanges, the stem of the main steam valve and the throttle valve, the shaft seals, and the cylinder joint surfaces ； ③ A water hammer sound can be clearly heard inside the pipe ； ④ Axial displacement increases ； ⑤ Increase in thrust bearing temperature ； ⑥ The vibration of the unit is gradually intensifying ； ⑦ Metallic noises and impacts are coming from inside the unit ； ⑧ During grid-connected operation, the load decreases ； ⑨ The speed of the machine decreases during operation.
①The main and reheat steam temperatures drop by 50°C or more within 10 minutes. ②Main steam valve flange, cylinder joint surface, control valve stem; white steam appears or water droplets splash at the shaft seal. ③The steam pipeline has water hammer noise and intense vibration. ④As the load decreases, the sound of the turbine becomes deeper and the vibration of the unit increases. ⑤As the axial displacement increases, the temperature of the thrust pads rises, and the differential expansion decreases or becomes negative.
① The steam inlet temperature drops sharply； ② White wet steam emerges or water droplets splash out from the steam pipe flanges, the stem of the main steam valve and the throttle valve, the shaft seals, and the cylinder joint surfaces ； ③ A water hammer sound can be clearly heard inside the pipe ； ④ Axial displacement increases ； ⑤ Increase in thrust bearing temperature ； ⑥ The vibration of the unit is gradually intensifying ； ⑦ Metallic noises and impacts are coming from inside the unit ； ⑧ During grid-connected operation, the load decreases ； ⑨ The speed of the machine decreases during operation.