公开(公告)号：US11971324B2

公开(公告)日：2024-04-30

申请号：US18202953

申请日：2023-05-29

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Zhaoyao Shi ,  Yanqiang Sun

IPC: G01M13/021

CPC classification number: G01M13/021

Abstract: A method for checking or testing the profile of the path of contact of involute helical cylindrical gears is disclosed. The crossed helical gear transmits motion through the profile of the path of contact, and checking or testing the profile of the path of contact can reflect the transmission quality and working stability of the gear and the actual motion condition. In the gear hobbing, the grinding, the shaving and other generating machining, the movement of tools and gears is achieved based on the profile of the path of contact, and controlling the profile of the path of contact has unique advantages in controlling the quality of gear processing.

公开(公告)号：US11964902B2

公开(公告)日：2024-04-23

申请号：US18389556

申请日：2023-11-14

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Yufeng Wu ,  Xiaomin Liu ,  Dean Pan

IPC: C03B1/00 ,  C03B19/06 ,  C03B19/10 ,  C03C1/00 ,  C03C10/00

CPC classification number: C03C10/0063 ,  C03B1/00 ,  C03B19/063 ,  C03B19/1045 ,  C03C1/002

Abstract: The invention discloses a method for preparing lead smelting slag glass-ceramics based on the oxidation of silicon-rich silicon smelting slag and composition adjustment, and belongs to the technical field of resource utilization of smelting slag rich in monatomic silicon. The method comprises the steps: mixing the silicon slag rich in monatomic silicon with an oxidant, a fluxing agent and a clarifying agent according to a formula ratio, ball-milling and screening to obtain a tempering raw material with uniform size, and performing high-temperature oxidation melting on the tempering raw material to form an oxidation-state molten tempering material; and carrying out further mixed melting on the molten tempering material and hot lead slag, carrying out water quenching to obtain basic glass, and carrying out heat treatment system on the obtained basic glass to form the glass ceramics. According to the method, the smelting slag rich in monatomic silicon is subjected to oxidation tempering and mixed melting with the hot lead slag to prepare the basic glass, and the glass ceramics are obtained by regulating and controlling the heat treatment system of the basic glass. The method is simple in technological process, high in production efficiency and low in cost, achieves the collaborative high-value conversion target of the silicon-rich silicon slag and the lead slag, and is easy to industrially popularize and apply.

公开(公告)号：US20240109798A1

公开(公告)日：2024-04-04

申请号：US17768668

申请日：2021-07-21

Applicant: Beijing University of Technology

Inventor： Yongzhen PENG ,  Jingang QIU ,  Qiong ZHANG ,  Zhong WANG ,  Hao JIANG ,  Shang REN

IPC: C02F3/30

CPC classification number: C02F3/307 ,  C02F3/303 ,  C02F3/305 ,  C02F2101/163 ,  C02F2209/02 ,  C02F2209/04 ,  C02F2209/06 ,  C02F2209/38

Abstract: Disclosed are a method and device for realizing advanced nitrogen removal of mature landfill leachate and sludge reduction by using sludge fermentation products as carbon source, belonging to the field of biological treatment of sludge of high ammonia nitrogen wastewater. The mature landfill leachate first enters a PNA-SBR, the reactor operates in an anoxic/anaerobic/oxic (A/A/O) mode, denitrification is performed at an anoxic state; then anaerobic ammonia oxidation is performed at an anaerobic stage to remove part of ammonia nitrogen and nitrite nitrogen; partial nitrification is performed at an oxic stage to remove the ammonia nitrogen; discharged water is pumped into a DN-SBR, meanwhile, an excess sludge fermentation mixture is added, the reactor operates in an anoxic/anaerobic/oxic (A/A/O) mode, organic matters in the sludge fermentation mixture are used for denitrification at an anoxic stage, and meanwhile, microorganisms store an inner carbon source; ammonia nitrogen brought by the fermentation mixture is removed at an anaerobic stage; and denitrification is performed through the inner carbon source at an oxic stage. The remarkable sludge reduction effect is achieved while a removal rate of TN achieves 96.0%, and the method and the device are suitable for advanced removal of the high ammonia nitrogen wastewater.

公开(公告)号：US20240010507A1

公开(公告)日：2024-01-11

申请号：US17626805

申请日：2021-09-18

Applicant: Beijing University of Technology

Inventor： Dean Pan ,  Guanjun Li

IPC: C01D3/10 ,  B01D11/04 ,  B01D9/00

CPC classification number: C01D3/10 ,  B01D11/0492 ,  B01D9/0018 ,  B01D11/0488

Abstract: The invention belongs to the field of bromine recovery from waste circuit board, and particularly relates to a method for recovering high-purity sodium bromide from bromine-containing crude salt. The invention mainly includes the steps of acidification oxidation, multi-stage extraction, and cooperative back extraction. Compared with traditional chlorine oxidation and single urea back extraction technology, the acidification oxidation process can be effectively controlled by reasonable adjustment of the added amount of hydrochloric acid and sodium chlorate, and the tail gas can be absorbed and reused to avoid secondary pollution and resource waste. At the same time, urea is used with sodium carbonate for cooperative back extraction to achieve a high back extraction rate which greatly reduces the amount of urea, and obtains high-purity sodium bromide crystals. The efficient recovery of bromine resources in bromine-containing crude salt is realised. The benefits of the invention are: high product purity, simple operation, environmental friendliness.

公开(公告)号：US11860150B2

公开(公告)日：2024-01-02

申请号：US18326049

申请日：2023-05-31

Applicant: Beijing University Of Technology

Inventor： Chao Wang ,  Guanyu Gong ,  Zhengyang Ren

IPC: G01N33/42 ,  G01N3/24 ,  G01N3/32

CPC classification number: G01N33/42 ,  G01N3/24 ,  G01N3/32 ,  G01N2203/0025 ,  G01N2203/0073

Abstract: A method for evaluating damage-healing characteristics of paving asphalt based on energetics principle includes: obtaining a numerical integral AH of a stored pseudo strain energy required by asphalt to compensate damage-healing to loading times and obtaining local life compensation ΔN of the asphalt benefiting from damage-healing characteristics; calculating an average stored pseudo strain energy QH of the asphalt according to the following formula:






Q
H

=


A
H


Δ
⁢
N



;




and evaluating the asphalt damage-healing characteristics according to the average stored pseudo strain energy QH of the asphalt. This method is based on the evolution law of the average stored pseudo strain energy required to compensate the damage-healing to explore the damage-healing characteristics of asphalt. As a characteristic index of materials, this energy evaluation index has nothing to do with the damage state and the rest periods, but only depends on the strain load, which improves the testing efficiency.

公开(公告)号：US11858848B2

公开(公告)日：2024-01-02

申请号：US17485790

申请日：2021-09-27

Applicant: Beijing University of Technology

Inventor： Mingzhang Lan ,  Tianrui Pei ,  Jianfeng Wang ,  Junjian Yang ,  Zhifeng Chen ,  Suping Cui ,  Yali Wang

IPC: C04B24/02 ,  C04B24/12 ,  C04B28/06 ,  C04B40/00 ,  C04B28/14 ,  C04B103/00 ,  C04B103/10 ,  C04B7/32 ,  C04B11/30

CPC classification number: C04B28/065 ,  C04B24/023 ,  C04B24/122 ,  C04B24/123 ,  C04B28/14 ,  C04B40/0039 ,  C04B40/0042 ,  C04B7/323 ,  C04B11/30 ,  C04B2103/0008 ,  C04B2103/10 ,  C04B28/14 ,  C04B22/14 ,  C04B22/085 ,  C04B24/122 ,  C04B24/28 ,  C04B28/14 ,  C04B22/14 ,  C04B22/143 ,  C04B22/085 ,  C04B24/122 ,  C04B24/28 ,  C04B14/06 ,  C04B40/0039 ,  C04B22/085 ,  C04B22/143 ,  C04B24/02 ,  C04B24/04 ,  C04B24/121 ,  C04B7/323

Abstract: A regulating cementitious material for promoting hydration of Portland cement is provided. The regulating cementitious material may include ingredients by weight as follows: ye'elimite, 27˜68 parts; anhydrite, 29˜68 parts; lithium nitrite, 2˜5 parts; ethylene glycol monoisopropanolamine, 0.14˜0.29 parts; triethanolamine acetate, 0.04˜0.09 parts; and polyglycerol, 0.04˜0.09 parts. An early strength of Portland cement can be improved through a cooperative hydration between minerals and an enhanced solubilization of a complexing agent.

公开(公告)号：US20230384285A1

公开(公告)日：2023-11-30

申请号：US18326049

申请日：2023-05-31

Applicant: Beijing University Of Technology

Inventor： Chao Wang ,  Guanyu Gong ,  Zhengyang Ren

IPC: G01N33/42 ,  G01N3/24 ,  G01N3/32

CPC classification number: G01N33/42 ,  G01N3/24 ,  G01N3/32 ,  G01N2203/0073 ,  G01N2203/0025

Abstract: A method for evaluating damage-healing characteristics of paving asphalt based on energetics principle includes: obtaining a numerical integral AH of a stored pseudo strain energy required by asphalt to compensate damage-healing to loading times and obtaining local life compensation ΔN of the asphalt benefiting from damage-healing characteristics; calculating an average stored pseudo strain energy QH of the asphalt according to the following






Q
H

=


A
H


Δ
⁢
N



;




and evaluating the asphalt damage-healing characteristics according to the average stored pseudo strain energy QH of the asphalt. This method is based on the evolution law of the average stored pseudo strain energy required to compensate the damage-healing to explore the damage-healing characteristics of asphalt. As a characteristic index of materials, this energy evaluation index has nothing to do with the damage state and the rest periods, but only depends on the strain load, which improves the testing efficiency.

公开(公告)号：US11798658B2

公开(公告)日：2023-10-24

申请号：US16980370

申请日：2019-10-16

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Xiaoyan Song ,  Hao Lu ,  Yanan Li ,  Fawei Tang

IPC: G06F30/23 ,  G16C60/00 ,  G16C10/00 ,  G16C20/80 ,  G06F111/14 ,  G06F113/26 ,  G06F111/10

CPC classification number: G16C60/00 ,  G06F30/23 ,  G16C10/00 ,  G16C20/80 ,  G06F2111/10 ,  G06F2111/14 ,  G06F2113/26

Abstract: A computer simulation analysis method suitable for describing the mechanical behavior of multiphase composites based on the real microstructure of materials relates to a multidisciplinary field such as computational material science, simulation and high throughput calculation. Through the first-principles calculation under nano scale, the molecular dynamics simulation under micro scale, and the thermodynamic calculation under mesoscopic scale, various physical parameters needed for the finite element simulation under macro scale can be obtained, including the elastic and plastic physical parameters of each phase in the composite at different temperature and different grain sizes. Focused ion beam experiment and image processing are adopted to obtain real material microstructure. Through the parameter coupling and parameter transfer among the calculated results of various scales, combining the microstructure of the material, stress-strain relationship, stress distribution and its evolution law, plastic deformation and other mechanical behaviors of the multiphase composites under complex stress and different temperature can be simulated.

公开(公告)号：US11698248B1

公开(公告)日：2023-07-11

申请号：US18073713

申请日：2022-12-02

Applicant: Beijing University of Technology

Inventor： Tong An ,  Xueheng Zheng ,  Rui Zhou ,  Fei Qin

IPC: G01B11/02 ,  H01L21/67 ,  G01B11/30 ,  G01M5/00 ,  G01M99/00 ,  G01N3/56

CPC classification number: G01B11/02 ,  G01B11/026 ,  G01B11/30 ,  G01M5/0033 ,  G01M5/0041 ,  G01M99/002 ,  G01N3/56 ,  H01L21/67259 ,  H01L21/67288

Abstract: Disclosed are a device and a method for measuring a fretting displacement in a power cycling of a press-pack insulated gate bipolar transistor (IGBT). The IGBT includes: a bracket; slide bars slidably mounted on the bracket and are arranged at least four along a circumferential direction of the bracket; sensors respectively slidably installed on the bracket and the slide bars; and a power cycling experiment device arranged inside the bracket.

公开(公告)号：US20230193488A1

公开(公告)日：2023-06-22

申请号：US18168819

申请日：2023-02-14

Applicant: Beijing University of Technology

Inventor： Xiaoli Xi ,  Liwen Zhang ,  Zuoren Nie

IPC: C25B11/042 ,  C25B1/01 ,  C01B32/949

CPC classification number: C25B11/042 ,  C01B32/949 ,  C25B1/01 ,  C01P2004/62 ,  C01P2004/64

Abstract: The present disclosure provides a method for in-situ synthesizing tungsten carbide powder. In this method, cemented carbide scrap is used as an electrode and the molten salt electrolysis process is used to in-situ synthesize tungsten carbide powder, where a bidirectional pulse is used in the molten salt electrolysis process. In the method provided by the present disclosure, by using the bidirectional pulse and using the cemented carbide scrap as electrode in the molten salt medium, when the tungsten carbide scrap is oxidized, tungsten is dissolved in ionic form, deposited after the direction of current changes, and reacted with the carbon anode sludge in situ to generate tungsten carbide powder. In the present disclosure, the carbon anode sludge is treated appropriately, the recycled product can be used in upmarket application, there is no need to apply complicated processes to process the tungsten powder into tungsten carbide, and the tungsten carbide nanopowder with high-performance can be recycled and prepared in a short process.