长征三号乙火箭由中国航天科技集团公司所属的中国运载火箭技术研究院研制，它继承了长征系列火箭所采用的、经飞行验证的成熟技术。长征三号乙是长征系列火箭中GTO运载能力最大的运载火箭，它以长征三号甲运载火箭为芯级，第一级捆绑了四个助推器。长征三号乙火箭可将质量为5500千克的有效载荷送入标准地球同步转移轨道。
The LM-3B launch vehicle has been developed and manufactured by China Academy
of Launch Vehicle Technology（CALT）, a subsidiary of China Aerospace Science &
Technology Corporation (CASC), upon the extensive heritage of the mature and flight
proven technology of Long March launch vehicles. LM-3B, based on the LM-3A as
its core stage, with four liquid boosters strapped on its first stage, is the most powerful
launch vehicle for a GTO mission in the Long March fleet, capable of launching a
payload up to 5,500 kg into the standard GTO.
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1. 整流罩
Fairing
2. 卫星
SC
3. 卫星支架
Payload Adapter
4. 仪器舱
Vehicle Equipment Bay
5. 液氢箱
LH2 Tank
6. 液氧箱
LOX Tank
7. 二三级级间段
Inter-stage Section
8. 三级发动机
Third Stage Engine
9. 二级氧化剂箱
Second Stage Oxidizer Tank
10. 箱间段
Inter-tank Section
11. 二级燃料箱
Second Stage Fuel Tank
12. 二级游动发动机
Second Stage Vernier Engine
13. 二级主发动机
Second Stage Main Engine
14. 一二级级间杆系
Inter-stage Section
15. 一级氧化剂箱
First Stage Oxidizer Tank
16. 箱间段
Inter-tank Section
17. 一级燃料箱
First Stage Fuel Tank
18. 一级发动机
First Stage Engine
19. 助推器头锥
Booster's Nose
20. 助推器氧化剂箱
Booster's Oxidizer Tank
21. 助推器燃料箱
Booster's Fuel Tank
22. 稳定翼
Stabilizer
23. 助推器发动机
Booster's Engine |
发射倒计时程序
LAUNCH COUNTDOWN PROCEDURE
| 序号/No. |
时间/Time |
事 件 |
Events |
1 |
L-7 hrs |
三级LOX、LH2加注 |
LV Stage III LOX/LH2 Fueling; |
2 |
L-80 min |
控制系统加电、功能检查 |
LV Control System Power On & Function Checkout; |
3 |
L-60 min |
遥测系统加电、功能检查 |
LV Telemetry System Power On & Function Checkout; |
4 |
L-40 min |
整流罩空调停止、连接器脱落
精瞄；飞行数据装订、检查；
一、二级、助推器气管连接器脱落 |
Fairing Air-conditioning Turn-off & Air-conditioning Pipe
Drop-off;Accurately Aiming;Flight Program Loading and
Check–up ;Gas Pipes for Stage I and Stage II Drop-off; |
5 |
L-20 min |
三级发动机预冷 |
LV Stage III Engines Pre-cooling; |
6 |
L-13 min |
三级推进剂射前补加 |
LV Stage III Propellants Topping; |
7 |
L-15～10 min |
卫星脱落插头脱落 |
SC Umbilical Disconnection; |
8 |
L-3 min |
遥、外测系统转电；
三级加注连接器脱落 |
Telemetry and Tracking Systems Power Switch-over;
LV Stage III Propellant Fueling Pipe Disconnection; |
9 |
L-2 min |
三级气管连接器脱落 |
Gas Pipe for Stage III disconnection; |
10 |
L-90 sec |
控制系统转电 |
Control System Power Switch-over; |
11 |
L-60 sec |
控制、遥测、外测系统脱落
插头脱落，摆杆摆开
|
Control System, Telemetry System and Tracking System
Umbilical Disconnection; Rods Swing-off; |
12 |
L-30 sec |
牵动 |
TT&C Systems Starting; |
13 |
L-5 sec |
开拍 |
Cameras On; |
14 |
0 sec |
点火 |
Ignition. |
长征三号乙运载火箭飞行时序
LM-3B LAUNCH VEHICLE FLIGHT SEQUENCE
序号/No. |
时间（秒）/Time(s) |
飞行事件 |
Flight Events |
1 |
0.0000 |
起飞 |
Lift-off |
2 |
11.0000 |
程序转弯 |
Pitch-over |
3 |
141.0316 |
助推器分离 |
Boosters Separation |
4 |
159.3645 |
一二级分离 |
Stages I and II separation |
5 |
235.7645 |
整流罩分离 |
Fairing Jettison |
6 |
344.1645 |
二、三级分离 |
Stages II and III separatio |
7 |
612.6626 |
三级发动机一次关机 |
First shut-off of Stage III |
8 |
1256.1626 |
三级发动机二次点火 |
Restart of Stage III |
9 |
1442.2266 |
三级发动机二次关机 |
Second shut-off of Stage III |
10 |
1462.2266 |
调姿开始 |
Attitude adjustment |
11 |
1542.2266 |
星箭分离 |
SC/LV separation |
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