Turbine Definitions

Question 1

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

Answer 1

Runner hub

Question 2

Curved members of runner which transmit energyfrom the flowing water to the runner hub

Answer 2

Adjustable runner blades

Question 3

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

Answer 3

Crosshead

Question 4

Conical lowermost extension on the runner which streamlines the turbine

Answer 4

Runner cone

Question 5

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

Answer 5

Gate operating ring

Question 6

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

Answer 6

Wicket gates

Question 7

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

Answer 7

Gate stem

Question 8

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

Answer 8

Gate lever

Question 9

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

Answer 9

Shear lever

Question 10

Member connecting operating ring to the shear lever

Answer 10

Gate link

Question 11

Weak link connecting shear lever designed to break when an obstruction prevents the gate from closing

Answer 11

Shear pin

Question 12

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

Answer 12

Outer head cover

Question 13

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

Answer 13

Intermediate head cover

Question 14

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

Answer 14

Inner head cover

Question 15

Stationary ring supporting the lower gate stems

Answer 15

Bottom ring

Question 16

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

Answer 16

Stay ring

Question 17

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

Answer 17

Stay vanes

Question 18

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

Answer 18

Discharge ring

Question 19

The water passage from the reservoir to the stay ring

Answer 19

Scroll case

Question 20

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

Answer 20

Draft tube liner

Question 21

Metal liner surrounding the wheel pit and lining the concrete wall

Answer 21

Pit liner

Question 22

Platform and supporting structure in the wheel pit above the headcover that facilitates inspections and servicing

Answer 22

Turbine walkway

Question 23

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

Answer 23

Servomotor

Question 24

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

Answer 24

Turbine guide bearing

Question 25

Seperates the water passage from the atmosphere and restricts water leakage past the shaft into the inner head cover

Answer 25

Packing box

Question 26

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

Answer 26

Main shaft

Question 27

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

Answer 27

Coupling flange

Question 28

Protective cover over the coupling bolts or nuts

Answer 28

Nut guard

Question 29

Connects the gate servomotor piston to the operating ring

Answer 29

Connecting rod

Question 30

Connects the blade servomotor piston to the crosshead

Answer 30

Operating rod

Question 31

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

Answer 31

Oil head pipes