Answer / deepesh giri sharma

Turbine has to rotate at a speed (Say 6000 rpm) but when due to some reasons like tripping of any equipment or turbine itself it.s speed goes down then turning gear engages with the turbine and rotate it at a speed (say 300-400 rpm) to avoid developing the thermal stress. There is clutch with turning/barring gear which automatically engages with turbine shaft and rotate it with the help of a motor.

Answer / hameedwahab

The role of turning gear in Steam Turbine: To rotate rotor in low speed for the following purposes:
1.To Warm Rotor uniformly before start up.
2.To Cool Rotor uniformly after shutdown.
3.To reduce the initial Torque during start up.

If an ID Fan is designed for a suction pressure of - 250 mm wg and discharge pressure of +150 mm wg, and it is installed in a system where the required system resistance at suction is only -50 mm wg, will the ID Fan be able to produce a discharge pressure of +350 mm wg?

1 Answers  

---

position of check valve and valve ,how to arrangement of valve before check valve in pump station.

1 Answers   Ingersoll,

---

Hi.. I am studying Mechanical Engineering.. And I am going to prepare for an interwiew of Caritor a software company.. so pleaz tell what i want to study in software and how I should prepare???

2 Answers  

---

if weld join is failed in radiography what is procudure and its penality

1 Answers  

---

type of welding

0 Answers  

---

---

What is sheet metal work?

0 Answers  

---

wt is bulk mod

2 Answers   TCS,

---

How does an equal-arm balance work?

0 Answers  

---

how air cylinder cfm calcualted.suppose cylinder bore-40mm and stroke 70mm operating pressure 6bar calculate air cylinder cfm.

3 Answers   Epitome, FMI,

---

How pipe flanges are electrically insulated?

0 Answers  

---

How do you repair a hydraulic jack?

0 Answers  

---

how to measure temperature of a bearing

1 Answers  

---