-
公开(公告)号：US11346645B2
公开(公告)日：2022-05-31
申请号：US16310447
申请日：2018-05-28
Applicant: Beijing University of Technology
Inventor： Shuting Ji , Yueming Zhang , Yu Yang
Abstract: The invention relates to a testing device for material wear of cycloidal gear and needle bearing of RV reducer, comprising: an upper cover (1), a lower cover (2), two sliding shafts (3 and 3′), two connecting shafts (4 and 4′), a driven shaft component (5), two copper sleeves (6 and 6′), two nuts (7 and 7′), two disc springs (8 and 8′), an eccentric shaft component (9), a needle bearing (10), two planetary gears (11 and 11′), two cycloidal gears (12 and 12′), and a motor assembly (13). The device can be installed on various industrial platforms. The motor drives the planetary gear to rotate, and then drives the eccentric shaft to rotate. The first bearing hole of the cycloidal gear fits with the needle bearing and forms a revolute pair with the eccentric shaft. Owning to the eccentric shaft, the cycloidal gears (12 and 12′) are driven to swing. The other bearing hole fits with the sliding shaft (3 and 3′) and the connecting shaft (4 and 4′) to form a loaded rolling friction pair. Then the cycloidal gear drives the sliding shaft to perform reciprocating movement along the track of cavity. The connecting shaft (4 and 4′) and the sliding shaft (3 and 3′) exert the load on the cycloidal gear (12 and 12′) and needle bearing (10) by compressing the disc springs via the nuts. After a specified time of operation, measure the diameter of bearing holes of cycloidal gear and the outer diameter of needle bearing, then evaluate the material wear of the two components. It provides reliable testing data for the selection of material and the determination of heat treatment process of the cycloidal gear and needle bearing. The invention solves the difficult problem for measuring the material wear of cycloidal gear and needle bearing, which are the key components of RV reducer.
-
公开(公告)号：US20220059262A1
公开(公告)日：2022-02-24
申请号：US17520452
申请日：2021-11-05
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor： Weiqiang Liu , Hao Chen , Ming Yue , Zhi Li , Yantao Yin , Yuqing Li , Hongguo Zhang
Abstract: A two-step diffusion method for preparing high-performance dual-main-phase sintered mischmetal-iron-boron magnet belongs to the preparing technical field of rare earth permanent magnet materials. The compositions of the two main phase alloys are RE-Fe—B (RE is Nd or Pr) and (Nd, MM)-Fe—B (MM is mischmetal), respectively. First, PrHoFe strip-casting alloy is used as a diffusion source. Next, a PrHo-rich layer is uniformly coated on the surface of (Nd, MM)-Fe—B hydrogen decrepitation powders. The higher anisotropic fields of Pr2Fe14B and Ho2Fe14B are used to improve the coercivity. Then, the ZrCu strip-casting alloy is used as a diffusion source. A Zr-rich layer is uniformly coated on the surface of the powders after the first-step diffusion, which prevents the growth of the MM-rich main phase grains during the sintering process and the inter-diffusion between the two main phases, thus obtains high coercivity.
-
公开(公告)号：US11225018B2
公开(公告)日：2022-01-18
申请号：US16446314
申请日：2019-06-19
Inventor： Lifang Wu , Miao Yu , Yisong Gao , Lidong Zhao , Yuan Gao , Xiaohua Guo , Meng Jian , Changling Wang , Ziming Zhang , Yuanzheng Shi
IPC: B29C64/245 , B29C64/379 , B29C64/118 , B29C64/209 , B29C64/227 , B29C67/00 , B33Y50/02 , B29C64/393 , B29C64/241 , G05B19/4099 , B33Y10/00 , B33Y30/00 , B33Y40/00
Abstract: A multi-degree-of-freedom (Multi-DOF) 3D printing device includes a printer mechanism, a rotatable platform, a visual inspection system, and a control system. The printing mechanism includes a print head. The printing mechanism and the rotatable platform are combined to have three degrees of freedom of translation, and the rotatable platform has two degrees of freedom of rotation. The visual inspection system includes a camera mounted to nearby the print head and the relative position of camera and print head remains constant. The control system is configured to implement the printing process. The model is decomposed into several components, each of which could be printed in a single direction. After one component is printed out, the platform is then rotated so that the cutting plane for the component will be printed is horizontal.
-
公开(公告)号：US20210395120A1
公开(公告)日：2021-12-23
申请号：US17334535
申请日：2021-05-28
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor： Hong-Gui Han , Lin-lin Zhang , Jun-Fei Qiao
IPC: C02F3/00 , C02F3/30 , G05B19/042
Abstract: A data-knowledge driven multi-objective optimal control method for municipal wastewater treatment process belongs to the field of wastewater treatment. To balance the energy consumption and effluent quality, a data driven multi-objective optimization model, including energy consumption model and effluent quality model are established to obtain the nonlinear relationship along energy consumption, effluent quality and manipulated variables. Meanwhile, a multi-objective particle swarm optimization algorithm, based on evolutionary knowledge, is proposed to optimize the set-points of nitrate nitrogen and dissolved oxygen. Moreover, the proportional integral differential (PID) controller is designed to track the set-points. Then the effluent quality can be improved and the energy consumption can be reduced.
-
45.发明授权公开(公告)号：US11198621B2
公开(公告)日：2021-12-14
申请号：US16313150
申请日：2017-12-22
Applicant: Beijing University of Technology
Inventor： Haijun Yu , Guangyin Li , Tianhao Wu , Errui Wang , Lin Wang , Qi Zhang
IPC: C01G53/00 , C01F5/00 , H01M10/0525
Abstract: A lithium-rich layered oxide material with a phase structure gradient and method for making the same are disclosed, used as cathode material for lithium ion battery. The invention has the following technical features: the spherical granule-shaped lithium-rich layered oxide material contains two types of structural units whose ratio gradually changes from the center to the surface of the spherical granule, wherein the monoclinic Li2MnO3 structural unit is gradually reduced, and the rhombohedral LiTMO2 structural unit is gradually increased from the center to the surface of the spherical granule. By controlling the ratio of the monoclinic Li2MnO3 structural unit versus the rhombohedral LiTMO2 structural unit along from the center to the surface the spherical granule, the performance of the Lithium-rich layered oxide materials as cathode for lithium ion battery, such as cyclic stability, specific discharge capacity, safety and other properties, is improved. The preparation process is simple and easy to control, the cost of raw materials is low and the environment is friendly. It can be industrialized on a large scale and has a good prospect of application.
-
Patent Agency Ranking
公开(公告)号：US11198615B2
公开(公告)日：2021-12-14
申请号：US16348506
申请日：2018-12-21
Applicant: Beijing University of Technology
Inventor： Yufeng Wu , Dean Pan , Bin Li , Tieyong Zuo
IPC: C01G3/00 , C01G3/10 , C01G9/06 , C01G21/20 , C22B7/00 , C22B7/04 , C22B3/00 , C22B15/00 , C22B19/30
Abstract: A method of pretreatment and bromine recovery of PCB Incineration ash is disclosed that relates to the field of comprehensive recovery of valuable metals by full wet method, especially relates to a method of valuable metals and bromine recovery, precious metals enrichment in pretreatment process of PCB Incineration ash. The major steps includes alkali leaching, Cu extraction back-extraction, neutralization-precipitation to separate, Bromine evaporative crystallization, regeneration, acid pickling, Zn evaporative crystallization, removal of Zn and Cu. Compared with the traditional comprehensive recovery process of ash, the invention can separate bromine from ash and recover valuable metals such as copper, zinc and lead with the maximum extent, at the same time, the enrichment of silver and other precious metals is beneficial to the subsequent recovery of precious metals. It has high added recovery value and no tailless discharge.
-
公开(公告)号：US20210354216A1
公开(公告)日：2021-11-18
申请号：US16483036
申请日：2019-02-20
Applicant: Beijing University of Technology
Inventor： Jing Zhao , Hao Zhang , Ziqiang Zhang , Tong Wu
Abstract: The invention discloses a clamping-cutting-grasping multi-functional engineering attachment applying single-degree-of-freedom shape-shifting mechanism, having a symmetrical structure, comprising: a clamping and cutting device, a grasping device, and a separating and deforming device; further comprises two hydraulic cylinders, one base, two separation bases, a driving hydraulic cylinder, hydraulic scissors, a grasping connecting rod, a grasping claw, a separating connecting rod, a base guide rod, a base slider, a separating slider, first connecting rod, second connecting rod and separation slider track groove. The invention uses a double slider mechanism to achieve the relative movement between the grasping device versus the clamping and shearing device, and also realizes a fast conversion from clamping and cutting device to the grasping device, all the work requirements being satisfied under each working state without motion interference.
-
48.发明授权公开(公告)号：US11142481B2
公开(公告)日：2021-10-12
申请号：US16814262
申请日：2020-03-10
Applicant: Beijing University of Technology
Inventor： Yali Wang , Jianfeng Wang , Yunfang Lv , Zhenguo Wang , Yuanzhong Han , Shichao Zhang
IPC: C04B24/00 , C04B7/147 , C07C213/06
Abstract: An additive for increasing an early activity index of nickel slag and a preparation method thereof, belonging to the field of additive technologies, are provided. The preparation method includes: successively adding maleic anhydride and triethanolamine to a reactor; setting the heating temperature to 50° C. for reaction, where a large amount of heat is released during the reaction; when the reaction temperature decreases to 60° C. after heat is released in the reaction, allowing triethanolamine maleate to react with a solution of bromine in carbon tetrachloride; adding water to the mixture, where the weight percentage content of the added water is 60%; separating and removing carbon tetrachloride from water; and conducting uniform stirring to obtain the additive. A molar ratio of the maleic anhydride, the triethanolamine, and bromine is (0.2-1):1:(0.2-1), and a molar ratio of the maleic anhydride to the bromine is 1:1.
-
公开(公告)号：US20210309533A1
公开(公告)日：2021-10-07
申请号：US17351083
申请日：2021-06-17
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor： Yufeng WU , Gongqi LIU , De-an PAN
Abstract: A method for purifying sodium bromide by the waste circuit board pyrolysis coke, belonging to the field of purifying sodium bromide and high-value utilization, and more particularly, relating to a method for reducing and purifying crude bromine salt enriched from waste circuit board smelting ash by using waste circuit boards pyrolysis coke. The main steps are as follows: carbonization conversion, purification filtration and vacuum exsolution. The pure sodium bromide crystal was obtained by reducing crude bromine salt enriched from waste circuit board smelting ash by using coke in waste circuit board pyrolysis residues, realizing the resource coupling and high-value utilization of the two wastes, avoiding the secondary pollution in the process of recycling the waste circuit boards. It has the characteristics of simple operation, high resource utilization rate and no tail liquid discharge.
-
公开(公告)号：US11106939B2
公开(公告)日：2021-08-31
申请号：US16709947
申请日：2019-12-11
Applicant: Beijing University of Technology
Inventor： Yanfeng Sun , Fujiao Ju
Abstract: A processing method for high-order tensor data, which can avoid that the vectorization process of the image observation sample set damage the internal structure of the data, simplify the large amount of redundant information in the high-order tensor data in the image observation sample set, and improve the image processing speed. In this processing method for high-order tensor data, the high-order tensor data are divided into three parts: the shared subspace component, the personality subspace component and the noise part; the shared subspace component and the personality subspace component respectively represent the high-order tensor data as a group of linear combination of the tensor base and the vector coefficient; the variational EM method is used to solve the base tensor and the vector coefficient; design a classifier to classify the test samples by comparing the edge distribution of samples.
-
-
-
-
-
-
-
-
-
Search Results
379
records
(took 0.027 seconds)
