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公开(公告)号：US11814331B2
公开(公告)日：2023-11-14
申请号：US16751731
申请日：2020-01-24
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Peng Yin , Yuren Lu , Ruili Jia , Jianfeng Song
CPC classification number: C06B21/0091 , B29C35/08 , C06B21/0058
Abstract: The present disclosure is related to the technical field of propellant performance research, and in particular, to a method for reducing propellant curing residual stress by a high-energy acoustic beam. The method includes the following steps: injecting a propellant slurry into a curing container and waiting for the propellant slurry to start curing; actuating, when the propellant slurry starts curing, a high-energy acoustic beam generator and a high-energy acoustic beam transducer to continuously emit high-energy acoustic beam to the propellant slurry in the curing container until the propellant slurry is cured to form a propellant grain; and closing the high-energy acoustic beam generator and the high-energy acoustic beam transducer. The method for reducing propellant curing residual stress by high-energy acoustic beam provided in the present disclosure can reduce residual stress inside the propellant in an effective manner, thereby ensuring operation safety of the aerospace equipment.
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公开(公告)号：US11708619B2
公开(公告)日：2023-07-25
申请号：US16796542
申请日：2020-02-20
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Peng Yin , Yuren Lu , Jianfeng Song , Peilu Li , Dezhi Li , Zhaowei Miao
CPC classification number: C21D1/04 , B23P9/04 , C21D10/00 , G10K15/043 , B23P2700/01
Abstract: The present disclosure relates to a method for reducing and homogenizing residual stress of a component, which comprises: detecting stress value(s) of regulation portion(s) of the component; placing the component in a container containing a fluid medium so as to immerse the component in the fluid medium; emitting, by an acoustic wave generator, an elastic wave to the fluid medium in a manner of emitting towards the regulation portion(s) of the component, and determining an emitting period of time and a frequency of the elastic wave based on the stress value(s); returning to the step S1 when the emitting period of time has elapsed, until the stress value(s) is stable. The method and the device solve the problems that it is difficult to reduce and homogenize the residual stress on high-precision machined components, complex structural components, thin-walled structural components, and low-stiffness components.
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公开(公告)号：US11320405B2
公开(公告)日：2022-05-03
申请号：US16684900
申请日：2019-11-15
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Yuren Lu , Dezhi Li , Peng Yin
Abstract: The present disclosure provides a non-destructive detecting method for weld residual stress and a probe using the same, in the above method, detecting is performed by an ultrasonic detecting probe in contact with a detected portion of a workpiece to be detected, wherein when the weld residual stress of an intersecting curve weld bead of surfaces of cylinders is detected, for the same position of the intersecting curve weld bead, one of the residual stress of an axial direction of the cylinders and the residual stress of a circumferential direction of the cylinders is detected as a principal stress. For the surface of the cylinder at one side of the intersecting curve weld bead, the detecting of the weld residual stress of the surface of the cylinder can be realized only by using an ultrasonic detecting probe having one type of curved surface.
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公开(公告)号：US11753696B2
公开(公告)日：2023-09-12
申请号：US17363579
申请日：2021-06-30
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Yuren Lu , Peng Yin , Peilu Li , Dezhi Li , Shuangyi Li , Wenyuan Song , Zhaowei Miao
CPC classification number: C21D11/00 , C21D9/30 , C21D10/00 , F16C2210/00 , F16C2223/10 , F16C2223/30 , F16C2360/00
Abstract: A method for controlling deformation of a large-scale crankshaft comprising detecting and recording stress value(s) of part(s) to be regulated by the crankshaft; fixing the crankshaft on a tool to couple transmitting ends of high-energy acoustic beam transducers with the part(s) to be regulated; turning on the high-energy acoustic beam transducers to emit high-energy acoustic beams into the crankshaft, controlling working frequencies of the high-energy acoustic beam transducers within a range of 10-30 kHz, and setting a predicted regulation and control time according to the stress value(s) of the part(s) to be regulated; and closing the high-energy acoustic beam transducers when the predicted regulation and control time is reached, and taking the crankshaft out of the tool.
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5.发明授权公开(公告)号：US11680857B2
公开(公告)日：2023-06-20
申请号：US17331045
申请日：2021-05-26
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Shuangyi Li , Yuren Lu , Peng Yin , Dezhi Li , Wenyuan Song
CPC classification number: G01L1/255 , G01L5/0047 , G01L5/0066 , G01N29/275 , G01N29/28 , G01N29/30 , G01N29/07 , G01N29/225 , G01N2291/101 , G01N2291/2623 , G01N2291/2626 , G01N2291/2634
Abstract: An ultrasonic test device and test method for service stress of a moving mechanical component, where the device comprises an ultrasonic probe, a coupling fluid, a pressure-maintaining cover and universal wheels. The cover is vertically arranged above an inspected position of an inspected component, an interior of the pressure-maintaining cover is filled with coupling fluid, a bottom of the cover is provided with a structure permeable to the coupling fluid to form a coupling fluid film between the inspected position and the bottom of the cover, and a top of the cover is equipped with the ultrasonic probe. A detection part at a lower part of the ultrasonic probe extends into the coupling fluid of the cover and is vertical to the bottom of the cover without contact. The distance between the ultrasonic probe and the inspected component is kept unchanged through the universal wheels.
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Patent Agency Ranking
公开(公告)号：US20220081736A1
公开(公告)日：2022-03-17
申请号：US17363579
申请日：2021-06-30
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Yuren Lu , Peng Yin , Peilu Li , Dezhi Li , Shuangyi Li , Wenyuan Song , Zhaowei Miao
Abstract: A method for controlling deformation of a large-scale crankshaft comprising detecting and recording stress value(s) of part(s) to be regulated by the crankshaft; fixing the crankshaft on a tool to couple transmitting ends of high-energy acoustic beam transducers with the part(s) to be regulated; turning on the high-energy acoustic beam transducers to emit high-energy acoustic beams into the crankshaft, controlling working frequencies of the high-energy acoustic beam transducers within a range of 10-30 kHz, and setting a predicted regulation and control time according to the stress value(s) of the part(s) to be regulated; and closing the high-energy acoustic beam transducers when the predicted regulation and control time is reached, and taking the crankshaft out of the tool.
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公开(公告)号：US20210086309A1
公开(公告)日：2021-03-25
申请号：US16991372
申请日：2020-08-12
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Shuangyi Li , Yuren Lu , Peng Yin , Dezhi Li , Ruili Jia , Wenyuan Song
Abstract: A device and method for reducing and homogenizing residual stress of a component by an array of high-energy elastic waves. The device includes a tubular body consisting of at least two elements, multiple first through holes and a clamping device provided on an outer side of the tubular body. Exciters are connected with exciting wedges so that an end face of each of the exciting wedges is closely coupled to a surface of the component. A connection portion is coupled to an emitting end of each of the exciters, where the axis of the emitting end coincides with a normal line at a pressed surface of the component A multi-channel signal amplifier is electrically connected to each of the exciters and a multi-channel excitation control module is electrically connected to the multi-channel signal amplifier.
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公开(公告)号：US20200158585A1
公开(公告)日：2020-05-21
申请号：US16684900
申请日：2019-11-15
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Yuren Lu , Dezhi Li , Peng Yin
Abstract: The present disclosure provides a non-destructive detecting method for weld residual stress and a probe using the same, in the above method, detecting is performed by an ultrasonic detecting probe in contact with a detected portion of a workpiece to be detected, wherein when the weld residual stress of an intersecting curve weld bead of surfaces of cylinders is detected, for the same position of the intersecting curve weld bead, one of the residual stress of an axial direction of the cylinders and the residual stress of a circumferential direction of the cylinders is detected as a principal stress. For the surface of the cylinder at one side of the intersecting curve weld bead, the detecting of the weld residual stress of the surface of the cylinder can be realized only by using an ultrasonic detecting probe having one type of curved surface.
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公开(公告)号：US11919040B2
公开(公告)日：2024-03-05
申请号：US17364071
申请日：2021-06-30
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Peng Yin , Yuren Lu , Shuangyi Li , Wenyuan Song
CPC classification number: B06B1/0622 , B06B3/00 , B23K20/10 , B06B2201/72
Abstract: A control device for reducing and homogenizing welding residual stress by acoustic waves, comprising: a fixing tool having two rows of through holes; a plurality of ultrasonic transducers each having a body and a conical horn transmitting portion at a lower end of the body, wherein lower ends of the horn transmitting portions are fixedly connected with flanges, the horn transmitting portions of the ultrasonic transducers extend into respective through holes of the fixing tool to be in contact with welded parts below the fixing tool, the flanges are fixed to the fixing tool by bolts, and the two rows of through holes are arranged both sides of a welding seam of the welded parts; and a driving device for driving the ultrasonic transducers to operate. A corresponding control method is also provided. The control device can be used to control residual stress at the welding seam of steels.
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10.发明授权公开(公告)号：US11680858B2
公开(公告)日：2023-06-20
申请号：US17377200
申请日：2021-07-15
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Shuangyi Li , Yuren Lu , Peng Yin , Dezhi Li , Wenyuan Song
CPC classification number: G01L1/255 , G01N29/043 , G01N29/07 , G01N29/27 , G01N29/28 , G01N2291/101
Abstract: A device and a method for ultrasonic detecting a rotating member based on magnetic fluid coupling, wherein the device comprises an ultrasonic probe, magnetic field protection rings, magnetic fluid and a magnetic fluid protection cover. The ultrasonic probe is arranged above the rotating member that is horizontally placed. Front ends of a transmitting ultrasonic transducer and a receiving ultrasonic transducer of the ultrasonic probe are provided with the magnetic field protection rings for generating magnetic fields in the magnetic field protection rings. The protective cover is sleeved on a circumferential outer side of the rotating member where a detected position is located, and the front ends of the ultrasonic probe are arranged to penetrate through the magnetic fluid protective cover. A cavity formed between the magnetic fluid protective cover and the rotating member is filled with the magnetic fluid and the magnetic fluid is a liquid mixture solution.
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