汽輪機(jī)設(shè)計(jì)說明書

第一章主蒸汽壓力：13.24Mpa主汽溫度高壓缸排汽壓力：2.55Mpa：3.63Mpa（第一壓力級(jí)后）再熱蒸汽壓力：2.295Mpa再熱蒸汽溫度：535℃排汽壓力：0.0049Mpa：125轉(zhuǎn)速：3000rpm發(fā)電機(jī)效率（1）節(jié)前級(jí)壓力P0P0P012.578Mpa，并確定調(diào)節(jié)級(jí)前蒸汽狀態(tài)點(diǎn)1，1PZ12.55Mpa2點(diǎn)，查得h2971.46kJkg，高壓缸理想焓降(hmac456kJkg 焓降hmac(hmac) P30.05P30.11475Mpa，得調(diào)節(jié)級(jí)前壓力P3'P3P32.18025Mpa，并確定調(diào)節(jié)級(jí)前蒸汽狀態(tài)點(diǎn)4，過4點(diǎn)作等比熵線向下交PZ20.0049Mpa線，查得h5t2280.87kJkg降(hmac1260.61kJkgt 0.02(hmac)''25.21kJ/kgC hmac(hmac i 且hhhmac2432.14kJkg ih5hthC22406.93kJkg（2）估算汽輪機(jī)的

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

m

.34)0.99 已知閥桿漏汽量Dm4.054thD14.007th，調(diào)節(jié)級(jí)漏入一級(jí)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（推薦值）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噴嘴出口面積GD394572kghv0.03130m3kg C1t433.70m/n 394572 8.1510-3（ A 1t 8.15103 0.97433.70n 確定e的原則是使 ????=??????0

????

??2??

????=????=(??+??)?? ??

=??

??0 ??0 ??=

(1????)??3;

噴嘴高度ln 度

?? ?? ????第四組噴嘴，全機(jī)e=4×0.392=0.4923

噴嘴高度 l edsin 0.3691.109103 度

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

動(dòng)度

r1(1

0.040(0.030, 11

C1sina1Ccosa

1汽流進(jìn)口相對(duì)速C1sina1420.70sin15.3256.91m/ 1度

sin hbmht0.07104.977.35kJ/

256.912=33kJ/ 對(duì)速度 h*hh7.353340.35kJ/ 44.72h*44.7240.35284.07m/ 22t0.924284.07=262.48m/ 動(dòng)葉后的焓降h2th0ht3427.53104.973322.56kJ

3

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

bb lebb

0.026040.369

t0.64y78B20mm流角a2，絕對(duì)速度C2，cos 262.48cos20.63 a2 2sincos 262.48cos20.63 絕對(duì)速度

2sin

262.48sin

116.93m/ C22116.9326.84kJ/ 余速損失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輪周效率 u

82.96 漏氣損失濕汽損失

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

級(jí)內(nèi)效率 i i i

PihiG78.57

394572

ht52kJ/kg，xadI h0.2847 52

v0.1053m3/d dz徑 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