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21.发明授权公开(公告)号：US11196374B2
公开(公告)日：2021-12-07
申请号：US17037873
申请日：2020-09-30
Applicant: Hunan University of Science and Technology
Inventor： Xiaoping Zhang , Ping Liu , Sijian Kuang , Zhu Zhang
Abstract: A modeling method of a stator winding air gap for temperature field analysis of an AC traction motor includes: changing the width of an air gap of a stator winding equivalent model according to a set value of spacing; establishing a three-dimensional finite element model of the AC traction motor with the stator winding air gap; based on the three-dimensional finite element model of different widths of the air gap, analyzing a temperature field to obtain a temperature field distribution diagram of the AC traction motor; carrying out the numerical fitting according to data in the temperature distribution diagram to obtain a function relation between the air-gap width and the temperature of the stator winding equivalent model; and by measuring the actual temperature of a motor stator winding, calculating an optimal air-gap width corresponding to the modeling of the stator winding of the current AC traction motor.
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公开(公告)号：US20250153237A1
公开(公告)日：2025-05-15
申请号：US19027526
申请日：2025-01-17
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Yongping JIN , Gan WANG , Deping PENG
Abstract: The present disclosure describes an early warning method for assessing the fatigue damage state of a tie rod of a diameter expanding machine, based on the oil pressure of a power cylinder. (1) An oil pressure sensor is installed on the power cylinder, and collects oil pressure data in real time. (2) Required parameters are input into an early warning system. (3) A health state indicator function model of the tie rod is constructed. (4) Calculating the constant term in a linear equation allows for the construction of a tie rod S-N fatigue curve equation at a 95% confidence level. (5) A cumulative damage factor and a current health indicator of the tie rod are calculated. (6) If the early warning system determines that the current health indicator of the tie rod is 60.5 or lower, an alarm is triggered.
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公开(公告)号：US12181382B2
公开(公告)日：2024-12-31
申请号：US17941235
申请日：2022-09-09
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Yongping Jin , Xiaobin He , Youduo Peng , Ping Liu
Abstract: A micro core-drilling testing system for high-pressure environment, including: a pressure chamber, a micro core-drilling testing platform and a control device. The micro core-drilling testing platform includes a lower tray, a middle tray, a hydraulic system, a stroke cylinder, a rock sample plate, a rock sample block, a pressure compensation device and a drilling rig. The drilling rig is configured to carry out core-drilling operation. The hydraulic system is configured to provide power for the drilling rig. The pressure compensation device is configured to balance the pressure inside the pressure chamber and the hydraulic system.
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公开(公告)号：US11846744B2
公开(公告)日：2023-12-19
申请号：US17687192
申请日：2022-03-04
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Guohong Fu , Hui Cheng , Songyuan Fu , Xiangqin Zhong
CPC classification number: G01V3/083 , G01V3/12 , G01R29/26 , G01V2003/086
Abstract: An electrical prospecting signal transmission device capable of suppressing electromagnetic coupling interference, including a rectangular wave signal source, an output circuit for supplying power to the ground and a plurality of transmission channels. Each of the plurality of transmission channels includes an isolated driving circuit, a low-pass filter circuit and a power amplification circuit connected sequentially in series. The rectangular wave signal source is configured to generate a rectangular wave or a composite rectangular wave. A signal output terminal of the rectangular wave signal source is connected to an input terminal of the isolated driving circuit, and an output terminal of the power amplification circuit is connected to the output circuit to supply power to the ground.
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公开(公告)号：US11824411B2
公开(公告)日：2023-11-21
申请号：US17456531
申请日：2021-11-24
Applicant: Hunan University of Science and Technology
Inventor： Xiaoping Zhang , Donghao Liu , Bo Fu
CPC classification number: H02K29/03 , H02K1/165 , H02K2201/03 , H02K2213/03
Abstract: To solve the problem of large electromagnetic noise in AC traction motor, embodiments have open square notches at symmetrical positions on both sides of stator teeth of AC traction motor to effectively reduce electromagnetic noise without affecting other performance indicators of motor. In addition, embodiments fit the functional relationship between the optimal notch size or optimal slotting position size of motors and their power by determining the optimal notch size or optimal slotting position size of motors with different power grades, so as to achieve the noise reduction effect.
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Patent Agency Ranking
26.发明授权公开(公告)号：US11812732B2
公开(公告)日：2023-11-14
申请号：US17148988
申请日：2021-01-14
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Yongping Jin , Guangping Liu , Youduo Peng , Buyan Wan , Ping Liu , Kun Xie
IPC: A01K79/00
CPC classification number: A01K79/00
Abstract: A suction sampler system for in situ collection of deep-sea floor organisms includes a pressure-retaining cylinder, a pressure compensation device, a cone component, semiconductor refrigeration components, a circuit cylinder and a collection cylinder. Two ends of the pressure-retaining cylinder are respectively equipped with a first and second seal mechanisms, and the cone component is arranged in the pressure-retaining cylinder. The pressure compensation device is connected to the pressure-retaining cylinder through a high-pressure pipe. The semiconductor refrigeration components are arranged outside the pressure-retaining cylinder. The circuit cylinder is equipped with a power supply and a controller, and the semiconductor refrigeration components are connected to the controller. A pressure sensor and a temperature sensor are arranged inside the pressure-retaining cylinder, and respectively connected to the controller. The collection cylinder communicates with the valve hole of the second seal mechanism through a pipeline.
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27.发明授权公开(公告)号：US11408239B2
公开(公告)日：2022-08-09
申请号：US17485861
申请日：2021-09-27
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Buyan Wan , Yongping Jin , Fenfei Peng , Jialiang Wang , Huan Liu
Abstract: A long-distance core drilling method suitable for a horizontal geological core drilling rig. (1) An active drill rod is connected to a drill rod, which is connected to a wireline-coring outer-tube drilling tool. (2) A steel-pipe string is connected to a fishing device, and the fishing device is connected to a spearhead on a core tube, which is placed to a designated position through a pipe-feeding mechanism. (3) A washing pump is started. (4) A core drilling is carried out. (5) A core is pulled out. (6) The steel-pipe string and the fishing device are reconnected. (7) The core tube is salvaged. (8) The core tube and drill pipe are replaced. (9) A hole is swept. (10) Steps (1)-(9) are repeated until the hole is drilled to a designated depth. (11) The core tube and the wireline-coring outer-tube drilling tool are recovered.
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公开(公告)号：US20220236441A1
公开(公告)日：2022-07-28
申请号：US17687243
申请日：2022-03-04
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Guohong FU , Qiyun JIANG , Songyuan FU , Hui CHENG
Abstract: A high-density integrated magnetic receiving antenna for electromagnetic exploration, including a multi-layer PCB. A PCB coil of multiple turns are drawn on each conductive layer of the multi-layer PCB, and is continuously wound on each conductive layer of the multi-layer PCB. PCB coils respectively on adjacent conductive layers are connected end to end via a conductive via or a conductive via and a jumper wire such that the PCB coils on each conductive layer of the multi-layer PCB are connected in series to form the high-density integrated magnetic receiving antenna with multiple turns.
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29.发明申请公开(公告)号：US20220221612A1
公开(公告)日：2022-07-14
申请号：US17687126
申请日：2022-03-04
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Guohong FU , Songyuan FU , Hui CHENG , Tianchun YANG
Abstract: A device for reducing turn-off time of a transient electromagnetic transmitting signal includes a transmitting coil, a first electronic switch to control connection mode of the transmitting coil and a second electronic switch configured to form a bridge arm. The transmitting coil is a twisted pair including a first wire and a second wire. The first wire is connected to one end of the second electronic switch. The other end of the second electronic switch is connected to one end of the first electronic switch. The other end of the first electronic switch is connected to the second wire. The connection mode of the transmitting coil includes head-to-head connection, head-to-tail connection and tail-to-tail connection between the first wire and the second wire. The first wire and the second wire are connected to form a transmitting loop.
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公开(公告)号：US11326398B2
公开(公告)日：2022-05-10
申请号：US17153578
申请日：2021-01-20
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Yongping Jin , Liang Liu , Youduo Peng , Buyan Wan , Jun Gong , Jian Yan
Abstract: The present disclosure provides a portable seafloor drill rig for a submersible for multi-point core drilling, including a power head, a reduction gear box, an emergency jettison device, a drilling tool, and a temperature and pressure-retaining device. a water supply connector and the power head are arrange on a top plate of the reduction gear box. An output shaft of the power head is connected to an input shaft of the reduction gear box, and an output shaft of the reduction gear box is provided with a central hole, which is in communication with a water inlet hole of the water supply connector. An output shaft of the reduction gear box is connected to the emergency jettison device, and the temperature and pressure-retaining device can perform temperature and pressure-retaining storage of the core drilled by the drilling tool.
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