On February 23, China successfully launched the communication technology test satellite No. 11 using the Long March 5 Yao-7 carrier rocket at the Wenchang Cosmodrome, and the satellite successfully entered the predetermined orbit, and the launch mission was a complete success.
The diameter of the core stage of the Chang-5 rocket is 5 meters, which is the largest size of the rocket in service in China. Lou Luliang, deputy chief designer of the Chang 5 rocket of the China Academy of Launch Vehicle Technology, introduced that the workload of a Chang 5 rocket is equivalent to 2 of conventional rockets5 to 3 times. Seventy days ago, after the Long March 5 Yao-6 rocket successfully put the Shijian-41 satellite into the scheduled orbit, the launch ground support system immediately took over the "baton" of the Yao-7 mission.
The take-off thrust of the Chang-5 rocket reaches 1,200 tons, and each launch is a "burning body" for the rocket launch platform, and the strong gas flow, vibration and noise impact will make the launch platform "break the muscles and bones", and the workload of recovery after launch is extremely large. Previously, the technical team's record for the fastest recovery was 31 days, but this time, they are pushing the limit by speeding up the time it takes for the launch pad to return to "factory settings" by another 35%.
The first time was carried out at night, the first time was carried out on the 8th day after launch, and the first time the load cell was replaced outside the plant ......The change in workflow has brought many "first" difficulties. During this period, the damp and cold air on the seashore brought by a cold wave also caused great trouble to the heat protection coating work.
Reducing the number of transitions can not only directly shorten the recovery time of the equipment, allow the work of the launch area and technical area to be completed at one time, but also reduce a lot of pipeline docking work and further shorten the time. Zeng Yi, deputy chief designer of the launch support system of the fifth series of rocket deans, introduced that after combing, the number of transitions in the equipment recovery process was reduced by 2 times, and the on-site coating operation was carried out according to the seams, and the post-launch recovery work was completed according to the planned node.
The payload of the Chang-5 rocket has a high scientific and technological content, great economic value and social impact, and the rocket itself is also very difficult to develop, and there must not be a slight mistake. Lou Luliang said that most of the payloads of the Chang 5 rocket are customized, and in order to better match the "customer", the rocket must have higher flexibility. Since the successful go-around, the Chang-5 rocket has carried out hundreds of innovations and technological improvements, and the current rocket is still far from reaching the solidified state, and is still undergoing technological iteration. This year, the number of launches of the Chang-5 series rockets will reach 4 to 5 times, and the frequency of such launches will be maintained in the next few years. After this mission, the launch site preparation time of the Chang-5 rocket was successfully compressed from 2 months to 43 days, leaving room for the implementation of subsequent missions.
*: Beijing ** client Reporter: Liu Suya.
Process edit: u060
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