Turbine Parts

Question 0

Adjustable Runner Blades

Answer 0

curved members on runner which transmit energy from the flowing water to the runner hub

Question 1

Runner Hub

Answer 1

provides support for the propeller blades and attachment to the main shaft

Question 2

Crosshead

Answer 2

component inside the hub which changes the angle of the adjustable blades via movement of the operating rod to which it is rigidly attached

Question 3

Runner Cone

Answer 3

conical lowermost extension on the runner which streamlines the turbine

Question 4

Gate Operating Ring

Answer 4

changes reciprocating energy to angular force and distributes to wicket gates simultaneously

Question 5

Wicket Gates

Answer 5

acts as a valve to regulate and equally distribute water flow to the runner blades

Question 6

Gate Stem

Answer 6

the top and bottom wicket gate extension which supports the gate in bearings

Question 7

Gate Lever

Answer 7

member rigidly attached to the gate stem which allows adjustment of wicket gate position

Question 8

Shear Lever

Answer 8

member which ‘floats’ on the gate stem and transmits energy from one gate link to the gate lever by way of the shear pin

Question 9

Gate Link

Answer 9

member connecting operating ring to the shear lever

Question 10

Shear Pin

Answer 10

“weak link” connecting shear lever to the gate lever designed to break when an obstruction prevents the gate from closing

Question 11

Outer Head Cover

Answer 11

outer circumferential section providing support from the upper gate stems, and provides containment and channeling of water leakage from around the upper gate stems

Question 12

Intermediate Head Cover

Answer 12

middle circumferential section connecting the inner and outer head covers and providing support for the operating ring

Question 13

Inner Head Cover

Answer 13

section containing and providing support for the turbine bearing and the packing gland housing

Question 14

Bottom Ring

Answer 14

stationary ring supporting the lower gate stems

Question 15

Stay Ring

Answer 15

stationary upper and lower radiuses sections, integral with stay vanes which provide support to the top and bottom turbine structure and direct the water into the gates

Question 16

Stay Vanes

Answer 16

streamlined members which support the stay rings and direct the water through the wicket gates

Question 17

Discharge Ring

Answer 17

stationary ring which surrounds the turbine blades and guides the water past the blades to the draft tube

Question 18

Scroll Case

Answer 18

the water passage from the reservoir to the stay ring

Question 19

Draft tube liner

Answer 19

metal liner under the discharge ring at the entrance to the draft tube, which protects the concrete from erosion

Question 20

Pit Liner

Answer 20

metal liner surrounding the wheel pit and lining the concrete wall

Question 21

Turbine Walkway

Answer 21

platform and supporting structure in the wheel pit above the head cover that facilitates inspections and servicing

Question 22

Servomotor

Answer 22

hydraulic cylinder containing a moving piston which converts fluid into force, for adjustment of the runner blade angle or the wicket gate position

Question 23

Turbine Guide Bearing

Answer 23

bearing assembly that is mounted inside the head cover which provides radial loading support for the main shaft

Question 24

Packing Box

Answer 24

separates the water passage from the atmosphere and restricts water leakage past the shaft into the inner headcover

Question 25

Main Shaft

Answer 25

the member which transmits the power developed by the runner to the generator

Question 26

Coupling Flange

Answer 26

connecting flange at either end of the shaft for attachment to the runner or generator

Question 27

Nut Guard

Answer 27

protective cover over the coupling bolts or nuts

Question 28

Connecting rod

Answer 28

connects the gate servomotor piston to the operating ring

Question 29

Operating Rod

Answer 29

connects the blade servomotor piston to the crosshead

Question 30

Oil Head Pipes

Answer 30

concentric oil pipes passing through the bore of the main shaft transmitting governor oil to the blade servomotor