Apparatus and method for regulating residual stresses in solidified propellants

Abstract

The application relates to a device and a method for regulating residual stress of propellant solidification, which comprises a base, a die cylinder arranged above the base, a plurality of stress reduction devices arranged on the outer cylinder wall of the die cylinder along the axial direction of the die cylinder, each stress reduction device comprising a plurality of stress reduction devices uniformly distributed along the circumferential direction of the outer cylinder wall of the die cylinder, each stress reduction device comprising a high-energy acoustic beam transducer and a wedge connected with the emitting end of the high-energy acoustic beam transducer, the end of the wedge away from the high-energy acoustic beam transducer being close to the outer cylinder wall of the die cylinder, a supporting mechanism arranged below the base and provided with a cavity, and a high-energy acoustic beam transducer installed below the base and located in the cavity of the supporting mechanism, the emitting end of the high-energy acoustic beam transducer being connected with a screw rod, and the top of the screw rod extending into a counterbore below the bottom of the die cylinder. The application is suitable for reducing residual stress of propellant.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of propellant performance research, and in particular to a device and method for regulating and reducing residual stress of solidified propellant. BACKGROUND

[0002] The solidified residual stress is generated and retained in the interior of the propellant material after thermosetting casting molding, and is inherent in the process of preparing and solidifying the propellant from raw materials, and is a basic physical property of the propellant material. The solidified residual stress has an important influence on the chemical and physical properties of the propellant in the whole life cycle, such as power, strength, and storage life, and is specifically manifested in the deformation and cracking of the solid rocket engine propellant in the storage and service process, which brings great security risks of accidental explosion to the safety and reliability of the solid rocket engine. Therefore, in order to ensure the safe operation of the spacecraft, it is necessary to reduce and homogenize the residual stress generated in the interior of the propellant.

[0003] The commonly used traditional methods for reducing residual stress of metal materials include heat treatment and mechanical impact, but there are few methods for reducing the residual stress of such non-metallic materials existing in the solidification process of the propellant and in the colloidal state phase, for example, based on the thermal sensitivity and mechanical sensitivity of the propellant, the traditional method is not applicable to the reduction of the residual stress of the propellant.

[0004] Therefore, it is necessary to provide a scheme suitable for reducing the residual stress of the propellant. SUMMARY

[0005] In view of the above problems of the prior art, the present application provides a device and method for regulating and reducing residual stress of solidified propellant.

[0006] To achieve the above-mentioned purpose, the first aspect of the present application provides a device for regulating and reducing residual stress of solidified propellant, comprising: a base; a mold cylinder is arranged above the base; a plurality of sets of stress reduction devices are assembled on the outer cylinder wall of the mold cylinder along the axial direction of the mold cylinder, each set of stress reduction devices comprising a plurality of stress reduction devices uniformly distributed along the circumference of the outer cylinder wall of the mold cylinder; each stress reduction device comprises a high-energy acoustic beam transducer and a wedge connected to the emitting end of the high-energy acoustic beam transducer, the end of the wedge away from the high-energy acoustic beam transducer is in close contact with the outer cylinder wall of the mold cylinder; a supporting mechanism is arranged below the base, and the supporting mechanism has a cavity; a high-energy acoustic beam transducer is installed below the base and located in the cavity of the supporting mechanism, and the emitting end of the high-energy acoustic beam transducer is connected to a screw rod, and the top of the screw rod extends into a counterbore below the bottom of the mold cylinder.

[0007] From the above, by means of the high-frequency fluctuation energy of the high-energy acoustic beam, the plastic induction effect is utilized to transfer it to the propellant slurry in the solidification process, so as to enhance the mechanical properties of the propellant slurry, so as to resist and eliminate the energy that causes the residual stress of the propellant during solidification, thereby effectively reducing the residual stress generated in the propellant. Secondly, by introducing the high-frequency small-amplitude high-energy acoustic beam, the particles in the propellant slurry are more closely packed, the surface leveling is improved, and the smooth escape of the gas in the propellant slurry is facilitated, further improving the mechanical properties and stability of the propellant slurry, so that the internal residual stress is reduced or even not formed.

[0008] It can be seen that the scheme of the high-energy acoustic beam regulation technology can quickly and effectively eliminate and homogenize the residual stress, has the advantages of low requirement for the surface of the component, easy to produce various waveforms, short time consumption, low energy consumption, no damage to the component, etc.

[0009] Optionally, the mold cylinder is composed of multiple identical mold cylinder sections, and the upper cylinder edge and / or the lower cylinder edge of each mold cylinder section is provided with a leakage prevention edge.

[0010] From the above, it is convenient to assemble and disassemble, and can be suitable for stress reduction of propellants of different heights. This structure not only helps to improve production efficiency, but also makes the device easier to maintain. Moreover, the leakage prevention edge achieves airtight sealing at the joint of the mold cylinder section, thereby reliably preventing liquid leakage during the solidification process.

[0011] Optionally, along the axial direction of the mold cylinder section, the two adjacent groups of high-energy acoustic beam transducers are arranged in staggered arrangement.

[0012] From the above, the two adjacent layers of high-energy acoustic beam transducers are arranged in staggered arrangement along the axial direction of the mold cylinder section, providing more comprehensive and uniform acoustic beam energy input of the mold cylinder in the entire space. This not only strengthens the regulation of the residual stress of the propellant, but also further optimizes the transmission efficiency of the high-energy acoustic beam.

[0013] Optionally, it further comprises a ring-shaped pressing mechanism, and the pressing mechanism comprises a plurality of pressing mechanism petals connected in a ring shape, and each stress reduction device is fixed to the outer cylinder wall of the mold cylinder through a pressing mechanism petal.

[0014] From the above, the structure, shape and number of the pressing mechanism petals can be adjusted according to actual needs to meet the requirements of different application scenarios and mold cylinders. This also makes the assembly and disassembly of the pressing mechanism on the mold cylinder more convenient and efficient.

[0015] Optionally, the pressing mechanism petal is provided with a mounting hole in the middle for the high-energy acoustic beam transducer to pass through, and a plurality of transducer bolt holes are arranged around the mounting hole, and the transducer bolt holes are used to fix the wedge connected to the emitting end of the high-energy acoustic beam transducer.

[0016] Optionally, the high-energy acoustic beam transducer emitting end is provided with a transducer threaded hole, and the wedge is provided with a matching threaded rod, and the high-energy acoustic beam transducer emitting end is connected to the wedge through the transducer threaded hole and the threaded rod.

[0017] From the above, the threaded detachable connection makes the assembly and disassembly of the connecting wedge more convenient, and facilitates the replacement of different wedges to adapt to different mold cylinder wall curvatures.

[0018] Optionally, part of the high-energy acoustic beam transducers are used for excitation, and part of the high-energy acoustic beam transducers are used for reception; the number of high-energy acoustic beam transducers used for excitation is different from the number of high-energy acoustic beam transducers used for reception, which is one-to-many, many-to-one, or many-to-many.

[0019] From the above, the control device can be adjusted according to different needs and actual conditions to achieve the best acoustic beam excitation and reception effect.

[0020] Optionally, each high-energy acoustic beam transducer is electrically connected to a network-programmed ultrasonic power source, and each network-programmed ultrasonic power source is electrically connected to a residual stress closed feedback control system; the residual stress closed feedback control system is used to control the control signal parameters of each network-programmed ultrasonic power source, and is used to configure the high-energy acoustic beam transducers for excitation or for reception.

[0021] From the above, through the closed feedback mode, automatic adjustment of the control signal parameters can be realized.

[0022] The second aspect of the present application provides a method for controlling the residual stress of propellant solidification, using any of the above-mentioned devices for controlling the residual stress of propellant solidification, the method comprising the following steps: setting the control signal parameters by the residual stress closed feedback control system; the network-programmed ultrasonic power source uses the high-energy acoustic beam transducers for excitation to excite high-energy acoustic beams to control the residual stress generated during the solidification process of the propellant according to the control signal parameters; at the same time of control, the high-energy acoustic beam transducers for reception receive the echo signals; the residual stress closed feedback control system adjusts the control signal parameters in real time by taking the changes of the received echo signals as feedback signals, and ends the control work when the echo signal changes reach the preset standard range.

[0023] Optionally, when the residual stress closed feedback control system adjusts the control signal parameters in real time, it further comprises: the residual stress closed feedback control system adjusts part of the high-energy acoustic beam transducers to be high-energy acoustic beam transducers for excitation, and adjusts part of the high-energy acoustic beam transducers to be high-energy acoustic beam transducers for reception. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A structural schematic diagram of the device for regulating the solidification residual stress of propellant provided by the embodiment of the present application is shown in FIG. 1.

[0025] Figure 2 A structural sectional schematic diagram of the device for regulating the solidification residual stress of propellant provided by the embodiment of the present application is shown in FIG. 2.

[0026] Figure 3 A die cylinder section schematic diagram of the device for regulating the solidification residual stress of propellant provided by the embodiment of the present application is shown in FIG. 3.

[0027] Figure 4 A pressing mechanism petal schematic diagram of the device for regulating the solidification residual stress of propellant provided by the embodiment of the present application is shown in FIG. 4.

[0028] Figure 5 A high-energy acoustic beam transducer and wedge schematic diagram of the device for regulating the solidification residual stress of propellant provided by the embodiment of the present application is shown in FIG. 5.

[0029] Figure 6 A closed-loop feedback regulation system schematic diagram of the device for regulating the solidification residual stress of propellant provided by the embodiment of the present application is shown in FIG. 6.

[0030] Figure 7 A flow chart of the method for regulating the solidification residual stress of propellant provided by the embodiment of the present application is shown in FIG. 7.

[0031] Reference signs:

[0032] 201 - die cylinder, 202 - high-energy acoustic beam transducer, 203 - pressing mechanism, 204 - base, 205 - supporting mechanism, 206 - wedge, 207 - screw rod, 208 - bolt, 2051 - positioning threaded hole, 2052 - wire inlet, 2011 - leakage prevention edge, 2031 - mounting hole, 2032 - pressing mechanism threaded hole, 2021 - positioning concave plane, 2022 - transducer threaded hole, 2061 - threaded convex rod, 2062 - curved surface.

[0033] It should be understood that the size and shape of each block in the above structural schematic diagram are only for reference and should not constitute exclusive interpretation of the embodiment of the present application. The relative position and inclusion relationship between each block presented by the structural schematic diagram only schematically represent the structural association between each block and does not limit the physical connection mode of the embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions provided by the present application are further described below in combination with the drawings and examples. It should be understood that the system structure and service scenarios provided in the examples of the present application are mainly to illustrate possible implementation manners of the technical solutions of the present application, and should not be interpreted as the only limitation of the technical solutions of the present application. Those skilled in the art can know that with the evolution of system structure and the appearance of new service scenarios, the technical solutions provided by the present application are also applicable to similar technical problems.

[0035] It should be understood that the schemes provided in the examples of the present application include devices and methods for regulating and controlling the solidification residual stress of propellants. Since the principles of solving problems of these technical solutions are the same or similar, in the introduction of the following specific examples, some repetitions may not be described again, but should be regarded as mutual reference and mutual combination between these specific examples.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. If there is any inconsistency, the meaning explained in the specification or derived from the content described in the specification shall prevail. In addition, the terms used herein are only for the purpose of describing the examples of the present application and are not intended to limit the present application.

[0037] As shown in Figures 1 to 6 The present application provides a device for regulating and controlling the solidification residual stress of propellants, which comprises:

[0038] The mold cylinder 201 located above the base 204, the pressing mechanism 203 on the cylinder wall of the mold cylinder 201, the connection of the high-energy acoustic beam transducer 202 and the wedge block 206 fixed on the cylinder wall of the mold cylinder 201 by the pressing mechanism 203, the base 204 arranged at the bottom of the mold cylinder 201, the support mechanism 205 arranged below the base 204, the high-energy acoustic beam transducer 202 installed in the support mechanism 205, and the closed-loop feedback control system electrically connected with the high-energy acoustic beam transducer 202.

[0039] Specifically, the clamping mechanism in the regulating device is fastened and fixed between the valve bodies by bolts 208 and fixed on the cylinder wall of the mold cylinder, the high-energy acoustic beam transducer 202 is connected with the wedge block 206 through threads and passes through the mounting hole 2031 on the clamping mechanism 203, the whole is tightly attached to the outer surface of the mold cylinder by the bolts 208 installed on the clamping mechanism 203, the bottom of the mold cylinder 201 is connected with the base 204 by the bolts 208, the high-energy acoustic beam transducer 202 in the supporting mechanism 205 is fixed below the base 204 by the screw rod 207, and its position in the supporting mechanism 205 is fixed by the bolts 208, so that the whole device becomes a whole. The high-energy acoustic beam transducer 202 is electrically connected with the network program-controlled ultrasonic power supply in the closed-loop feedback regulation system. The network program-controlled ultrasonic power supply in the residual stress closed-loop feedback regulation system controls multiple high-energy acoustic beam transducers 202 to emit high-energy acoustic beams to the propellant, at the same time, the echo signals received by the multiple high-energy acoustic beam transducers are detected on the detection interface of the residual stress closed-loop feedback regulation system, and the changes thereof are taken as feedback signals of the high-energy acoustic beam regulation to real-time change the regulation signal parameters until the preset standard range is reached to end the regulation process.

[0040] The purpose of adding high-energy acoustic beams in the process of propellant solidification is: first, by means of the high-frequency fluctuation energy of high-energy acoustic beams, the plasticity induction effect is utilized to transmit it to the propellant slurry in the solidification process, so as to enhance its mechanical properties, so as to resist and eliminate the energy that causes residual stress of the propellant during solidification, thereby effectively reducing the residual stress generated inside the propellant. Second, by introducing high-frequency small-amplitude high-energy acoustic beams, the particles in the propellant slurry are more closely packed, the surface leveling is improved, and the smooth escape of gas inside the propellant slurry is facilitated, further improving its mechanical properties and stability, so that it reduces or even does not form internal residual stress.

[0041] Optionally, the mold cylinder 201 above the base 204 is composed of multiple identical mold cylinder sections.

[0042] Specifically, the mold cylinder structure composed of multiple identical mold cylinder sections provides a more flexible and adjustable device to adapt to different propellant characteristics and process requirements. Each mold cylinder section is consistent to ensure seamless connection when splicing, thereby forming a complete and stable container. The device not only helps to improve production efficiency, but also makes the device easier to maintain and upgrade, providing reliable support for the solidification process of the propellant.

[0043] Optionally, the upper and lower cylinder edges of each spliced mold cylinder section are provided with a leakage-proof edge 2011.

[0044] Specifically, in each section of the spliced mold cylinder section, in order to effectively prevent possible liquid leakage, a leak-proof edge 2011 is specially designed. The leak-proof edge 2011 is arranged on the upper and lower cylinder edges of each section of the mold cylinder section, and its structure includes but is not limited to protrusions, grooves, sealing strips or other similar devices. By ingeniously arranging the leak-proof edge 2011 at the corresponding positions of the upper and lower cylinder edges, airtight sealing of the spliced position of the mold cylinder section is successfully achieved, thereby reliably preventing liquid leakage during solidification.

[0045] Optionally, the high-energy acoustic beam transducers are fixedly connected to the outer surface of the mold cylinder in a multi-layer distribution.

[0046] Specifically, the high-energy acoustic beam transducers are fixedly connected to the outer surface of the mold cylinder in a multi-layer distribution, and the number of layers determines the flexibility of the regulating device. At the same time, by arranging the high-energy acoustic beam transducers in a multi-layer distribution on the surface of the mold cylinder, more comprehensive and uniform acoustic beam energy input in the axial direction of the mold cylinder is provided. This not only strengthens the regulation of residual stress of the propellant, but also further optimizes the transmission efficiency of the high-energy acoustic beam.

[0047] Optionally, the high-energy acoustic beam transducers are fixedly connected to the outer surface of the mold cylinder in a multi-layer distribution, and at least one layer of high-energy acoustic beam transducers is arranged at each end of each mold cylinder section.

[0048] Specifically, the residual stress generated at the spliced position of the mold cylinder section will be greater than that at other positions, so that at least one layer of high-energy acoustic beam transducers is arranged at each end of each mold cylinder section. This not only helps to more accurately regulate the residual stress generated during the solidification of the propellant, but also realizes a more reliable and stable process of reducing and homogenizing the solidification stress.

[0049] Optionally, each layer of high-energy acoustic beam transducers arranged on the mold cylinder section is uniformly distributed along the circumferential direction of the mold cylinder section.

[0050] Specifically, each layer of high-energy acoustic beam transducers is uniformly distributed along the circumferential direction of the mold cylinder section, and the number of uniformly distributed exciters is optional, which determines the flexibility of the regulating device of each layer of high-energy acoustic beam transducers. At the same time, by arranging the high-energy acoustic beam transducers in a uniform distribution along the circumferential direction of the mold cylinder section, more comprehensive and uniform acoustic beam energy input in the circumferential direction of the mold cylinder is provided. This not only strengthens the regulation of residual stress of the propellant, but also further optimizes the transmission efficiency of the high-energy acoustic beam.

[0051] Optionally, along the axial direction of the mold cylinder section, two adjacent layers of high-energy acoustic beam transducers are arranged in staggered arrangement.

[0052] Specifically, two adjacent high-energy acoustic beam transducers are arranged in staggered manner along the axial direction of the die sleeve section, providing more comprehensive and uniform acoustic beam energy input to the die sleeve in the whole space. This not only strengthens the regulation of residual stress of the propellant, but also further optimizes the transmission efficiency of high-energy acoustic beam.

[0053] Optionally, the pressing mechanism 203 is fastened together by a plurality of pressing mechanism petals and fixed on the die sleeve wall by bolts 208.

[0054] Specifically, the pressing mechanism 203 has a plurality of pressing mechanism petals. The plurality of pressing mechanism petals are fastened together by bolts 208 to form an integral pressing mechanism 203, which is firmly fixed on the die sleeve wall. The structure, shape and number of the pressing mechanism petals can be adjusted according to actual needs to meet the special requirements of different application scenarios and die sleeve 201. Also makes the assembly and disassembly process of the pressing mechanism 203 on the die sleeve 201 more convenient and efficient.

[0055] Optionally, the pressing mechanism petals are provided with an installation hole 2031 slightly larger than the diameter of the high-energy acoustic beam transducer in the middle, and a plurality of pressing mechanism bolt holes 2032 are arranged around the installation hole 2031 for fixing the wedge block 206 connected to the end of the high-energy acoustic beam transducer.

[0056] Specifically, in the structure of the pressing mechanism petals, a installation hole 2031 slightly larger than the diameter of the high-energy acoustic beam transducer is intentionally provided in the middle. To ensure that the high-energy acoustic beam transducer 202 can be effectively installed therein. A plurality of pressing mechanism bolt holes 2032 are arranged around the installation hole 2031 for fixing the wedge block 206 connected to the end of the high-energy acoustic beam transducer on the die sleeve wall surface using bolts 208.

[0057] Optionally, the surface of the wedge block 206 connected to the end of the high-energy acoustic beam transducer in contact with the die sleeve wall is a curved surface 2062, and is in close contact with the die sleeve wall.

[0058] Specifically, the surface of the wedge block 206 in contact with the die sleeve wall is a curved surface 2062, and the contact with the die sleeve wall is close. Helps to improve the high-energy ultrasonic waves emitted by the high-energy acoustic beam transducer 202 to pass through the acoustic wedge block 206 to the inside of the propellant, and to homogenize and reduce the residual stress generated during the solidification process inside the propellant.

[0059] Optionally, the wedge block 206 connected to the end of the high-energy acoustic beam transducer is connected to the end of the high-energy acoustic beam transducer in a threadable and detachable manner.

[0060] Specifically, the wedge 206 connected to the end of the high-energy acoustic beam transducer is connected to the end of the high-energy acoustic beam transducer in a threaded detachable manner. The end of the high-energy acoustic beam transducer is provided with a corresponding transducer threaded hole 2022, and the connected wedge 206 is partially designed with a threaded rod 2061 adapted thereto. This threaded detachable connection makes the assembly and disassembly of the connecting wedge 206 more convenient to adapt to different mold cylinder wall curvatures.

[0061] Optionally, the side wall surface of the high-energy acoustic beam transducer 202 installed in the support mechanism 205 is provided with a positioning concave plane 2021.

[0062] Specifically, the side wall surface of the high-energy acoustic beam transducer 202 is provided with a positioning concave plane 2021, so that the high-energy acoustic beam transducer 202 can be accurately positioned and stably fixed in the support mechanism 205.

[0063] Optionally, the side wall surface of the support mechanism 205 provided below the base 204 is provided with a positioning threaded hole 2051 and a wire inlet 2052.

[0064] Specifically, the side wall surface of the support mechanism below the base 204 is provided with a positioning threaded hole 2051 and a wire inlet 2052. The high-energy acoustic beam transducer 202 installed in the support mechanism 205 is fixed in its relative position in the support mechanism 205 by a bolt 208 in the positioning threaded hole 2051. The wire inlet 2052 provides a convenient circuit access channel for the high-energy acoustic beam transducer 202 installed in the support mechanism 205.

[0065] Optionally, a coupling agent is uniformly applied to the part where the propellant mold cylinder and the high-energy acoustic beam transducer connecting wedge contact, and the propellant mold cylinder and the high-energy acoustic beam transducer are tightly and stably coupled.

[0066] Specifically, uniformly applying a coupling agent to the part where the propellant mold cylinder and the high-energy acoustic beam transducer connecting wedge contact can ensure that the high-energy acoustic beam is uniformly injected into the propellant, ensuring the accuracy of the regulation process; tightly and stably coupling the propellant mold cylinder and the high-energy acoustic beam transducer ensures effective regulation of the high-energy acoustic beam on the propellant slurry solidification process, ensuring the best regulation effect, and thus effectively reducing and homogenizing the residual stress generated inside the propellant.

[0067] Each high-energy acoustic beam transducer is electrically connected to a network-programmed ultrasonic power source, and each network-programmed ultrasonic power source is electrically connected to a residual stress closed feedback regulation system; the residual stress closed feedback regulation system is used to control the regulation signal parameters of each network-programmed ultrasonic power source, and to configure the high-energy acoustic beam transducer for excitation or for reception.

[0068] Optionally, the control signal parameters set on the control interface of the residual stress closed-loop feedback control system include output amplitude, output power and output frequency.

[0069] Specifically, the control interface of the residual stress closed-loop feedback control system can adjust multiple parameters, including output amplitude, output power and output frequency. By adjusting these parameters, high-energy acoustic beams of different energies can be excited, and in the feedback control process, the excited high-energy acoustic beams can be matched with the corresponding real-time residual stress field, avoiding over-control and causing the performance of the propellant to decline.

[0070] Optionally, the number of high-energy acoustic beam transducers for excitation and the number of high-energy acoustic beam transducers for reception can be one-to-many, many-to-one or many-to-many.

[0071] Specifically, the number of high-energy acoustic beam transducers for excitation and the number of high-energy acoustic beam transducers for reception can be flexibly configured, including one-to-many, many-to-one or many-to-many, so that the control device can be adjusted according to different needs and actual situations to achieve the best acoustic beam excitation and reception effect. A more personalized and customizable acoustic energy transmission method is provided, thereby better meeting the needs of different propellant solidification process residual stress control.

[0072] As shown in Figure 7 The embodiment of the present application provides a method for controlling residual stress of propellant solidification, comprising the following steps:

[0073] Step S101: According to the size and structure of the propellant mold, a plurality of high-energy acoustic beam transducers are arranged around the mold;

[0074] Step S102: Setting control signal parameters on the control interface of the residual stress closed-loop feedback control system;

[0075] Step S103: According to the control signal parameters, the plurality of high-energy acoustic beam transducers excite high-energy acoustic beams to control the residual stress generated in the propellant solidification process;

[0076] Step S104: While controlling, detecting the echo signal received by the plurality of high-energy acoustic beam transducers on the detection interface of the residual stress closed-loop feedback control system;

[0077] Step S105: The change of the received echo signal is used as the feedback signal of the high-energy acoustic beam control to change the control signal parameters in real time, and when the change of the echo signal reaches the preset standard range, the control work is ended.

[0078] Specifically, according to the size and structure of the propellant mold cylinder 201, a device for regulating residual stress generated in the propellant solidification process is designed, and the designed residual stress regulating device is fixed to the outer surface of the propellant mold cylinder.

[0079] In some embodiments, when the residual stress closed-loop feedback regulation system adjusts the parameters of the regulation signals in real time, it also includes adjusting the functions of the high-energy acoustic beam transducers, such as adjusting part of the high-energy acoustic beam transducers to be high-energy acoustic beam transducers for excitation and adjusting part of the high-energy acoustic beam transducers to be high-energy acoustic beam transducers for reception.

[0080] From the above, not only can the parameters of the regulation signals of each high-energy acoustic beam transducer be flexibly controlled according to the situation of the regulation process, but also the functions of each high-energy acoustic beam transducer can be flexibly controlled.

[0081] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, and the division of the units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0082] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0083] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0084] In addition, the words "first, second, third, etc." or "module A, module B, module C" and the like in the specification and claims are only used to distinguish similar objects, and do not represent a specific order or sequence of the objects. It can be understood that, if permitted, the specific order or sequence can be interchanged, so that the application described herein can be implemented in an order other than that illustrated or described herein.

[0085] In the above description, the labels of the steps, such as S110, S120, and the like, involved in the description do not mean that the steps must be executed in this order, and the order of the steps can be interchanged or the steps can be executed simultaneously, if permitted.

[0086] The term "comprising" as used in the specification and in claims includes that the listed steps or components do not exclude additional steps or components. Thus, the term "comprising" as used in the specification and claims should not be interpreted as meaning only the listed steps or components, but rather should be interpreted as meaning that the listed steps or components are present, but additional steps or components can also be present. Thus, the expression "device comprising device A and B" should not be limited to a device consisting only of components A and B.

[0087] The phrase "one embodiment" or "an embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, but can refer to different embodiments. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0088] It should be noted that the above only describes the preferred embodiments of the application and the principles of the technology applied. Those skilled in the art will understand that the application is not limited to the specific embodiments described herein, and that various obvious changes, reconfigurations and substitutions can be made without departing from the scope of the application. Therefore, although the application has been described in detail through the above embodiments, the application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the application, and all fall within the scope of the application.

Claims

1. A device for regulating residual stress after propellant curing, characterized in that, include: Base; A mold cylinder is installed above the base; Multiple sets of stress relief devices are assembled on the outer wall of the mold cylinder along the axial direction of the mold cylinder. Each set of stress relief devices includes multiple stress relief devices evenly distributed along the circumference of the outer wall of the mold cylinder. Each stress relief device includes a high-energy acoustic beam transducer and a wedge block connected to the emitting end of the high-energy acoustic beam transducer, with one end of the wedge block facing away from the high-energy acoustic beam transducer tightly attached to the outer wall of the mold cylinder. A support mechanism is provided below the base, and the support mechanism has a cavity inside; A high-energy acoustic beam transducer is installed below the base and located in the cavity of the support mechanism. The transmitting end of the high-energy acoustic beam transducer is connected to a screw, the top of which extends into the countersunk hole below the bottom of the mold cylinder. Some of the high-energy acoustic beam transducers are used for excitation, and some of the high-energy acoustic beam transducers are used for receiving. The number of high-energy acoustic beam transducers used for excitation and the number of high-energy acoustic beam transducers used for receiving are one transmit and multiple receive, multiple transmit and one receive, or multiple transmit and multiple receive. Each high-energy acoustic beam transducer is electrically connected to a network-programmed ultrasonic power supply, and each network-programmed ultrasonic power supply is electrically connected to the residual stress closed feedback control system. The residual stress closed-loop feedback control system is used to adjust the control signal parameters of each network programmable ultrasonic power supply in real time by using the changes in the received echo signal as a feedback signal, and is also used to configure high-energy acoustic beam transducers for excitation or reception.

2. The apparatus according to claim 1, characterized in that, The mold cylinder is composed of multiple identical mold cylinder sections spliced ​​together, and each spliced ​​mold cylinder section has a leak-proof edge on its upper and / or lower cylinder edges.

3. The apparatus according to claim 2, characterized in that, Along the axial direction of the mold section, two adjacent sets of high-energy acoustic beam transducers are arranged in a staggered manner.

4. The apparatus according to claim 3, characterized in that, It also includes a ring-shaped clamping mechanism, which comprises multiple clamping mechanism petals connected in a ring in sequence. Each stress relief device is fixed to the outer wall of the mold cylinder through a clamping mechanism petal.

5. The apparatus according to claim 4, characterized in that, The clamping mechanism has a mounting hole in the middle for the high-energy sound beam transducer to pass through, and multiple transducer bolt holes are arranged around the mounting hole for fixing the wedge connected to the high-energy sound beam transducer transmitter.

6. The apparatus according to claim 5, characterized in that, The high-energy sound beam transducer transmitter is provided with a transducer threaded hole, and the wedge is provided with a matching threaded protrusion. The high-energy sound beam transducer transmitter is connected to the wedge through the transducer threaded hole and the threaded protrusion.

7. A method for regulating residual stress during propellant solidification, characterized in that, The method using the apparatus for regulating propellant solidification residual stress according to any one of claims 1 to 6 comprises the following steps: The control signal parameters are set through a residual stress closed-loop feedback control system; The network-controlled ultrasonic power supply, based on the control signal parameters, is used to excite a high-energy acoustic beam transducer to control the residual stress generated during the propellant solidification process by exciting the high-energy acoustic beam. While the system is being controlled, a high-energy acoustic beam transducer, which acts as a receiver, receives the echo signal. The residual stress closed-loop feedback control system uses the changes in the received echo signal as a feedback signal to adjust the control signal parameters in real time. When the change in the echo signal reaches the preset standard range, the control operation ends.

8. The method according to claim 7, characterized in that, When the residual stress closed-loop feedback control system adjusts the control signal parameters in real time, it also includes: The residual stress closed-loop feedback control system adjusts the high-energy acoustic beam transducer in one section to be used as an excitation high-energy acoustic beam transducer, and adjusts the high-energy acoustic beam transducer in another section to be used as a receiving high-energy acoustic beam transducer.

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