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Reaction Turbine

Extraction backpressure turbine Multi-stage backpressure Turbine Condensing turbine Extraction condesing turbine

   The condensing turbines are designed on building-block system and their passage-flow part is optimized, turbine consists of three main sections, each section has some dimensions.

        NK--maximum inlet steam conditions: 10MPa/480℃

        HNK--maximum inlet steam conditions: 14Pa/540℃

        The turbine is a single casing, a shaft, reaction type, and has a reduction gearbox, when front section dimension exceed 50, turbine will connect with a generator directly.

        This series unit is designed on the turbine parameters (called standard type) specified by GB(National Standard of PRC ), also turbine is designed in accordance with the user’s special requirements(called non-standard type). The non-controlled extraction condensing steam turbine may provide a certain steam flow for industrial need.

        This series unit consists of a rotor and stator. The rotor is integral rotor. A governing stage is impulse blade and pressure state blades in the drum rotor are reaction blade cascade, end stages blades are twisted blade with the fork type blade root. The balance piston is provided on the rotor. The stator includes an outer casing(consists of a front section, middle section and exhaust section), steam chest, guide blade support ring, labyrinth gland and bearing etc. A governing valve is connected with an actuator of speed regulation system via a mechanical lever.

        A governing system is full hydraulic and consists of many standard assemblies; it provides the protection devices that have difference functions under the user requirements.

Type

Code

Rated output (KW)

Inlet conditions

Inlet steam flow 
(t/h)

Cooling water temperature

Exhaust Pressure
(MPa)

Rated speed
(r/min)

Steam rate
(kg/ kW.h)

Wei-ght
(t)
Outline dimen-sion

Arrange-ment

Re-marks

Pre-ssure
(MPa)

Tempe -rature
(℃)

Normal
(℃)

Maxi-mum
(℃)

(L×H×Wmm)
N3-3.33 T6135 3000 3.33 435 15 27 33 0.0078 11583L
/3000R
5.0 8.7 2810×2610×1850 Double layer NK25/ 36/ 0
*1
N3-0.98 T6136 3000 0.918 300 20 27 33 0.0120 9568L
/3000R
6.67 9.0 2680×3032×2110 Double layer NK32 / 36/ 0
N3-1.27 T6144 3000 1.275 340 24.5 27 33 0.0147 9568L
/3000R
8.15 9.7 2750×3020×2110 Double layer NK32/ 36/ 16
*2
N5.4-0.88 T6174 5400 0.882 280 36 27 33 0.0108 5939L
/3000R
6.67 21 4000×4280×3260 Double layer

NK50/ 56/ 25
*3

N3.7-1.3 T6233 3730 1.30 340 26.8 25 32 0.010 9568L
/3000R
7.19 9.7 2750×3020×2110 Double layer

NK32/ 36/ 16
*4

N25-3.8 T6290 25000 3.8 390 118 31 32 0.012 3000 4.7 80.80 6040×5760×4340 Double layer

NK63/ 81/ 0

N6-2.15 T6307 6000 2.15 435 27.7 27 33 0.010 7683L
/3000R
4.62 14.90 3200×3500×2400 Double layer

NK32/ 45/ 0

N15-3.37 T6356 15760 3.37 427 62 25 33 0.009 5513L
/3000R
3.95 54 4380×4850×3610 Double layer

NK50/ 71/ 0
*5

N7.5-8.83 T6396 7500 8.83 535 30 27 33 0.012 9581L
/3000R
4.07 9.8 2850×3470×2155 Double layer

HNK25/ 36/ 0

Note: R—CW, view the generator from the turbine. L—CCW, view the generator from the turbine.
          *1—Non-controlled extraction pressure:0.392MPa,extraction flow: 2t/h
          *2—Exhaust pressure of winter heating:0.0412MPa
          *3—Non-controlled extraction pressure:0.043MPa,extraction flow: 2.5t/h
          *4—Non-controlled extraction pressure:0.04MPa,extraction flow: 4t/h
          *5—Controlled induction pressure:0.826MPa, induction flow: 11.5t/h



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