汽轮机设计说明书

第一章主蒸汽压力：13.24Mpa主汽温度高压缸排汽压力：2.55Mpa：3.63Mpa（第一压力级后）再热蒸汽压力：2.295Mpa再热蒸汽温度：535℃排汽压力：0.0049Mpa：125转速：3000rpm发电机效率（1）节前级压力P0P0P012.578Mpa，并确定调节级前蒸汽状态点1，1PZ12.55Mpa2点，查得h2971.46kJkg，高压缸理想焓降(hmac456kJkg 焓降hmac(hmac) P30.05P30.11475Mpa，得调节级前压力P3'P3P32.18025Mpa，并确定调节级前蒸汽状态点4，过4点作等比熵线向下交PZ20.0049Mpa线，查得h5t2280.87kJkg降(hmac1260.61kJkgt 0.02(hmac)''25.21kJ/kgC hmac(hmac i 且hhhmac2432.14kJkg ih5hthC22406.93kJkg（2）估算汽轮机的

设m1.243，ri10.792，ri20.888，m0.99由D mD (hmachmac)D 1

m

.34)0.99 已知阀杆漏汽量Dm4.054thD14.007th，调节级漏入一级抽汽口流量D23.697th，一抽汽量De117.598t/h。DD0Dm406.334.054402.276t/DnD(De1D2)394.572(17.5983.697)380.671t/dm平均度降hn口角理想焓降：取ht105kJkg（推荐值）取速比Xa0.38dm0.2847Xaht=0.28470.38取平 度h*h h* 2取初速度0=0，所以 udmn 174.11m/ X Cu174.11458.19m/ hC2446.852104.97kJ/a hnh0hn3427.5394.053333.47kJkgnPn10.250.815P 0a kRT1.3461.5(488273)679.69m/MCa446.850.66

294.051000433.70m/

（取0.97）C1C1t0.97433.70420.70m喷嘴出口面积GD394572kghv0.03130m3kg C1t433.70m/n 394572 8.1510-3（ A 1t 8.15103 0.97433.70n 确定e的原则是使 ∆ℎ𝑙=𝜉𝑙𝐸0

𝑎𝑎

𝑥2𝐸

𝑎∆ℎ=𝜉𝐸=(𝜉+𝜉)𝐸 𝑎

=𝐶

𝑒0 𝑠0 𝑤=

(1−𝑒−)𝑥3;

喷嘴高度ln 度

𝑎 𝑒 𝑑𝑛第四组喷嘴，全机e=4×0.392=0.4923

喷嘴高度 l edsin 0.3691.109103 度

由ln3-1，得t1.5r0.5dbdm db1.109m lblntr=30.04mm

动度

r1(1

0.040(0.030, 11

C1sina1Ccosa

1汽流进口相对速C1sina1420.70sin15.3256.91m/ 1度

sin hbmht0.07104.977.35kJ/

256.912=33kJ/ 对速度 h*hh7.353340.35kJ/ 44.72h*44.7240.35284.07m/ 22t0.924284.07=262.48m/ 动叶后的焓降h2th0ht3427.53104.973322.56kJ

3

0.03257m/2v0.03257m3/2积 AGbv2 .032572 3600 2

bb lebb

0.026040.369

t0.64y78B20mm流角a2，绝对速度C2，cos 262.48cos20.63 a2 2sincos 262.48cos20.63 绝对速度

2sin

262.48sin

116.93m/ C22116.9326.84kJ/ 余速损失hC nn

hn(12)h(10.972)94.055.56kJ/hb(12)h*(10.9242)40.355.90kJ/b104.975.565.96.8486.67kJ/0104.970.76.84100.182kJ/w (CcosaCcosa 174.11(420.70cos15.3116.93cos52.27)86.11kJ/h

u' u100.182''wu86.11u |'''||86.51285.953| u uhnh'1.286.673.71kJ/ln lnhh'h86.673.7182.96kJ/ u轮周效率 u

82.96 漏气损失湿汽损失

h 0hx0e e

E0(u)[Ke(u)2(1eek)Ke'Zk]4.34kJ/

) h lb 0.7(0.030042100.182 ) b b

hihuhehh82.964.340.051500=78.57

级内效率 i i i

PihiG78.57

394572

ht52kJ/kg，xadI h0.2847 52

v0.1053m3/d dz径 取Q 60m/s,z 2dz

Czsin dIdd m m dmht

53kJ/已知Ht456kJkgtH'456104.97351.03kJ/kg，取0.03，(1)H' (10.0325)351.03tZ

t Z

(1)Ht'

0.0298K

ri1

md2m(i1)(dZdI d3

di

I(i1~ ii

d40.9522md50.9548md6mmmmd7mmmm d8xh hi12.337(dm xt

axai

h152.00kJ/ttttth352.57kJ/tth452.86kJ/tth553.15kJ/tth653.44kJ/tth753.74kJ/tth854.04kJ/t

|P8P |2.52972.55

|P6P' 100% 0.40%

P'P

|r