公开(公告)号：US20250084806A1

公开(公告)日：2025-03-13

申请号：US18962602

申请日：2024-11-27

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Fengnan GUO ,  Yanxiang REN ,  Fengrui LI ,  Hua ZHANG ,  Yiming LI ,  Wenyu LI ,  Hongfeng JI ,  Lin FU

IPC: F02K9/12 ,  B33Y80/00 ,  F02K9/36

Abstract: The present invention discloses a multistage variable burning rate solid rocket motor and a forming method. A multi-material composite fiber skeleton structure is embedded inside a propellant in the present invention, so that the original burning rate of the propellant presents multistage changes to achieve the function of multistage thrust. The fiber skeleton structure embedded in the solid rocket motor is formed by additive manufacturing, fixed in a combustion chamber, and then charged at one time to complete the forming of a motor grain. The design can greatly increase the burning rates of the propellants of end-burning and bore-burning motors, and can also conduct multistage adjustment for the burning rates of the motors by changing the fiber skeleton and structure, so as to satisfy the requirements of missile weapon systems for multistage power propulsion. The present invention greatly simplifies the technological production process of the existing single-chamber multi-thrust motor.

公开(公告)号：US20250083209A1

公开(公告)日：2025-03-13

申请号：US18622974

申请日：2024-03-31

Applicant: Dalian University of Technology ,  AVIC Manufacturing Technology Institute

Inventor： Kailun ZHENG ,  Dechong LI ,  Lihua DU ,  Yujie HAN

IPC: B21D22/02

Abstract: A forming device and a forming method for a part with a regular cross-section are provided, and relates to the technical field of metal member forming and manufacturing. A part to be formed is heated by a part heating temperature control assembly to obtain required microstructure evolution, so that the forming performance is improved. A temperature control die assembly can be heated by setting die heating assemblies, so that hot stamping, die quenching and stress relaxation can be carried out. The internal stress state of the part is controlled by an axial force control assembly.

公开(公告)号：US20250067526A1

公开(公告)日：2025-02-27

申请号：US18700712

申请日：2022-12-26

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Yu LIU ,  Guanghan YAN ,  Jiafei ZHAO ,  Yongchen SONG ,  Mingrui SUN ,  Yiqiang LIANG ,  Lei YANG ,  Lunxiang ZHANG ,  Yunsheng YANG ,  Shuai LI ,  Zhaoda ZHANG ,  Xiaokai ZHANG ,  Han YAN ,  Fuyu HUA ,  Yunlong CHAI ,  Jun ZHANG ,  Di WU ,  Kangjie LIU ,  Peng WANG

IPC: F28F21/08 ,  B33Y80/00 ,  F28F9/24

Abstract: The present disclosure belongs to the technical field of heat exchangers, and provides a heat exchanger based on a Gyroid/Diamond (GD-type) hybrid minimal surface-based disturbance structure. The heat exchanger includes a core, headers, and flanges. The core includes a cold fluid channel and a hot fluid channel, the cold fluid channel and the hot fluid channel are separated by a parting sheet. An inlet and an outlet of the cold fluid channel are separated from an inlet and an outlet of the hot fluid channel by sealing bars. A GD-type hybrid minimal surface-based disturbance structure is inserted into the hot fluid channel. A cold fluid and a hot fluid are distributed in a cross-flow manner.

公开(公告)号：US12181490B2

公开(公告)日：2024-12-31

申请号：US17596241

申请日：2019-12-31

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Li Zou ,  Tiezhi Sun ,  Jiuming Zhang ,  Yuguo Pei ,  Zhenhao Li ,  Xinyu Ma ,  Zhe Sun ,  Zongbing Yu

IPC: G01P5/20 ,  G06F17/16 ,  G06F18/2135 ,  G06F18/22

Abstract: An improved modal decomposition method applicable to the analysis and reconstruction of the measured flow fields of internal solitary waves includes the following steps: S1. generating internal solitary waves and measuring a two-dimensional flow field sequence during the interaction of the internal solitary waves with the terrain; S2. extracting a target information from the two-dimensional flow field sequence and obtaining a flow field snapshot; S3. stitching the snapshots into a snapshot matrix in time order; S4. plotting the information density curve; S5. normalizing the information density curve and determining split points; S6. setting the snapshot matrix between two adjacent split points as a linear evolutionary characteristic stage; and S7. performing dynamic mode decomposition on the linear evolutionary characteristic stages.

公开(公告)号：US12151228B2

公开(公告)日：2024-11-26

申请号：US17786944

申请日：2020-09-18

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Yuan Gao ,  Yongfeng Jia ,  Aimin Li ,  Shaofeng Wang ,  Xin Wang

IPC: B01J20/00 ,  B01J20/20 ,  B01J20/30 ,  B09C1/10 ,  C09K17/02

Abstract: A device and method for preparing in-situ molded biochar with high specific surface area. Crushed and mixed biomass and modifier are fed into a hot pressing and pyrolysis device, and hot-pressing molding and pyrolysis carbonization are completed synchronously, which solves the problem of multiple steps and complicated equipment in the existing preparation process for molded biochar material. In-situ bonding molding is realized by adhesion, bridging, cross-linking and mechanical interlocking functions of low-temperature molten & softened lignin and pyrolytic tar. No additional cross-linking agent is needed in this process, so the production cost is low. Covering and suffocating actions of trace flame retardant modifier are utilized to reduce the temperature of biomass pyrolysis carbonization, inhibit excessive ablation and accelerate polycondensation reaction, thus to improve the specific surface area and yield of a product, and improve the cost performance of the product.

公开(公告)号：US20240359225A1

公开(公告)日：2024-10-31

申请号：US18769033

申请日：2024-07-10

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhubin HE ,  Haihui ZHU ,  Jian NING ,  Yi XU ,  Linwei LENG

IPC: B21C23/14

CPC classification number: B21C23/14

Abstract: The present invention belongs to the technical field of metal forming manufacturing and discloses an integral forming method for a large-size thin-walled ring shell. The integral ring shell obtained by the forming method of the present invention has only one circumferential weld seam and one radial weld seam. If the two weld seams are located in an excisable process segment region, the target part without weld seams can be obtained after the process segment is cut off. The forming method of the present invention adopts a local thermal expansion forming method, plastic deformation occurs only in mold-constrained high temperature regions in a single local forming process, and a part with each region meeting the requirements can be obtained after several local thermal expansion forming processes. The forming method of the present invention can obtain two open cross-sectional ring shell components or multiple segmented ring shell components at one time.

公开(公告)号：US20240271507A1

公开(公告)日：2024-08-15

申请号：US18124184

申请日：2023-03-21

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Yongchen SONG ,  Cong CHEN ,  Yingying CUI ,  Jingyue SUN ,  Qianli MA ,  Zherui CHEN ,  Yu LIU ,  Yi ZHANG ,  Yan QIN ,  Lanlan JIANG ,  Mingjun YANG ,  Yuechao ZHAO

IPC: E21B41/00 ,  E21B43/16

CPC classification number: E21B41/0064 ,  E21B43/164 ,  E21B2200/20

Abstract: A carbon dioxide sequestration method based on reservoir wettability optimization design and layered regulation, which proposes the following four schemes for a carbon dioxide sequestration process: a carbon dioxide sequestration process seepage characteristics simulation scheme, a reservoir wettability optimization design scheme, a reservoir wettability regulation scheme and a carbon dioxide sequestration well layout design scheme. Firstly, a quantitative relation between the contact angle and the carbon dioxide seepage characteristics of a reservoir is obtained by relevant methods, a large scale simulator is used to quantitatively simulate the influence of the contact angle distribution of the reservoir on carbon dioxide sequestration, and layered optimization design and regulation of reservoir wettability are carried out according to the simulation results; and a well layout mode of “using one well for multiple purposes—using two wells in conjunction—adopting a network layout” is used to improve the flexibility of well layout.

公开(公告)号：US12025604B2

公开(公告)日：2024-07-02

申请号：US17551695

申请日：2021-12-15

Applicant: Zhejiang University ,  Guangzhou Marine Geological Survey ,  Dalian University of Technology ,  Hangzhou Dianzi University

Inventor： Jiawang Chen ,  Bo Xiao ,  Qiaoling Gao ,  Jiafei Zhao ,  Qinghua Sheng

IPC: G01N33/24 ,  E21B25/18 ,  G01N1/28 ,  G01N1/42

CPC classification number: G01N33/24 ,  E21B25/18 ,  G01N1/286 ,  G01N1/42 ,  G01N2001/2873

Abstract: A transfer and online detection system for deep-sea sediment samples and an application method thereof are provided. A sample gripping and feeding device, a sample segment cutting device, a sample online detection device, a high-pressure ball valve and a pressure-retaining drill disengaging device of the system are coaxially connected with one another. A seawater booster pump is connected with a water inlet ball valve, and a valve control panel is connected with the sample gripping and feeding device, the sample segment cutting device, the high-pressure ball valve and the pressure-retaining drill disengaging device. The pressure-retaining drill disengaging device is configured for disengaging an inner barrel and an inner barrel joint, and the sample gripping and feeding device and the sample segment cutting device are configured for gripping and cutting core samples, and conveying the cut core samples into a subsample pressure-retaining storage cylinder for storage.

公开(公告)号：US20240215152A1

公开(公告)日：2024-06-27

申请号：US18031957

申请日：2022-11-14

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Ming LI

IPC: H05K1/02 ,  H05K3/00 ,  H05K3/12 ,  H05K3/46

CPC classification number: H05K1/028 ,  H05K3/0085 ,  H05K3/1275 ,  H05K3/4638 ,  H05K2203/0766 ,  H05K2203/14

Abstract: The present invention discloses a surface tension driven flexible electronics transfer printing method which uses a surfactant liquid membrane or a surfactant bubble as a transfer printing stamp, to realize the transfer printing of an electronic device with nanometer/micron/submillimeter thickness. A process of transfer printing is transparent and visible in a “what you see is what you get” manner to realize the accurate positioning of the electronic device. A local load technology is introduced, which is suitable for arbitrary complex curved substrate to realize diverse transfer printing. The electronic device can be transfer-printed to an application substrate with extremely-low interfacial adhesion, without the requirement for the strong and weak adhesion switching strategy of the traditional transfer printing. An unbearable electronic device membrane can be transfer-printed to an fragile receiving substrate with no loss or low loss, without the introduction of pre-pressure.

公开(公告)号：US20240191080A1

公开(公告)日：2024-06-13

申请号：US18546986

申请日：2021-09-02

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Shufen ZHANG ,  Lei LI ,  Bingtao TANG ,  Rongwen LV ,  Wei MA ,  Suli WU ,  Wenbin NIU ,  Benzhi JU

IPC: C09B29/00 ,  B01J19/00 ,  B01J19/18

CPC classification number: C09B29/00 ,  B01J19/0066 ,  B01J19/1812 ,  B01J2219/00195

Abstract: A method for producing water-soluble azo dyes by utilizes continuous diazotization reaction and continuous coupling reaction in a pipeline reactor. The diazo component, hydrochloric acid and sodium nitrite are simultaneously fed at the bottom of the pipeline reactor at room temperature, to perform a diazotization reaction in the pipeline and leave the diazotization reaction site in time, followed by performing the coupling reaction with the introduced coupled component. Under stirring of micro stirring blades, the materials at each flow layer are uniformly mixed and reacted, and the reaction materials flow upward under the action of a feed driving force and are discharged from the top of the continuous reactor to produce a water-soluble azo dye.