CN107061587A - A kind of axial current vortex system of double-deck permanent-magnet type moves back counterrecoil mechanism - Google Patents
A kind of axial current vortex system of double-deck permanent-magnet type moves back counterrecoil mechanism Download PDFInfo
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- 230000007246 mechanism Effects 0.000 title claims abstract description 35
- 238000013016 damping Methods 0.000 claims abstract description 35
- 238000009434 installation Methods 0.000 claims abstract description 21
- 230000000452 restraining effect Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 230000005415 magnetization Effects 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 2
- 239000000872 buffer Substances 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 12
- 230000003139 buffering effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
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- 238000013461 design Methods 0.000 description 2
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- 238000005265 energy consumption Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
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Abstract
本发明公开了一种双层永磁体型轴向电涡流制退复进装置，包括支撑机构、电涡流阻尼机构和复进机构；所述电涡流阻尼机构包括内层永磁体、外层永磁体、外层导磁块；所述内层永磁体与外层永磁体均为环形圆柱结构，外层永磁体的内径大于内层永磁体的外径，内层永磁体与外层永磁体同轴安装；支撑机构为复进机构提供支撑和移动导向；所述复进机构的圆管位于内层永磁体与外层永磁体之间，圆管与内层永磁体和外层永磁体产生相对运动；本发明装置阻尼系数高、对发射装置工作时受到的冲击载荷进行缓冲，可以有效减小其后坐位移和复进速度，并实现复进功能。
The invention discloses a double-layer permanent magnet type axial eddy current restraining and re-advancing device, which comprises a supporting mechanism, an eddy current damping mechanism and a re-advancing mechanism; the eddy current damping mechanism includes an inner layer permanent magnet and an outer layer permanent magnet , Outer layer magnetic block; The inner layer permanent magnet and the outer layer permanent magnet are both annular cylindrical structures, the inner diameter of the outer layer permanent magnet is greater than the outer diameter of the inner layer permanent magnet, and the inner layer permanent magnet and the outer layer permanent magnet are coaxial Installation; the support mechanism provides support and movement guidance for the recoil mechanism; the circular tube of the recoil mechanism is located between the inner permanent magnet and the outer permanent magnet, and the circular tube generates relative motion with the inner permanent magnet and the outer permanent magnet The device of the present invention has a high damping coefficient, buffers the impact load received by the launching device during operation, can effectively reduce its recoil displacement and recoil speed, and realizes recoil function.
Description
技术领域technical field
本发明属于电磁制动领域，特别是一种双层永磁体型轴向电涡流制退复进装置。The invention belongs to the field of electromagnetic braking, in particular to a double-layer permanent magnet type axial eddy current control device for retreating and re-advancing.
背景技术Background technique
发射装置在工作过程中承受剧烈的冲击载荷，为了防止发射过程中结构损坏并能实现后坐和复位功能，制退复进装置起到至关重要的作用。制退复进装置可以将作用时间很短幅值很大的冲击载荷转化为作用时间相对较长幅值小的平缓载荷。The launching device is subjected to severe impact loads during the working process. In order to prevent structural damage during the launching process and realize recoil and reset functions, the retreating and re-advancing device plays a vital role. The retreating and re-advancing device can convert the impact load with a short action time and a large amplitude into a relatively long action time and a small amplitude gentle load.
弹簧式缓冲器和液气式制退复进机常用来缓冲这类冲击载荷。弹簧式缓冲器结构简单，维护方便，但是弹簧并不能起到耗能作用，冲击载荷越大，复进时的冲击也就越大，且长期使用易产生疲劳断裂。液气式制退复进机重量轻且可以调节复进速度，但其工作特性随温度变化较大，必须经常检查液量和和气压，密封要求高，维护工作复杂。Spring buffers and hydraulic-pneumatic retractors are commonly used to cushion such shock loads. The spring buffer has a simple structure and is easy to maintain, but the spring cannot dissipate energy. The greater the impact load, the greater the impact during re-entry, and it is prone to fatigue fracture after long-term use. The liquid-pneumatic retreat and re-entry machine is light in weight and can adjust the re-entry speed, but its working characteristics vary greatly with temperature, the liquid volume and air pressure must be checked frequently, the sealing requirements are high, and the maintenance work is complicated.
《某火炮磁流变制退机设计与研究》(机械制造与自动化，2016年，第5期，黄学谦著，54-57页)中提出了一种磁流变式制退机，利用励磁线圈可以连续控制磁流变液的阻尼系数，能耗低且响应时间短，但是结构较复杂，对整个装置的密封性和控制电路要求较高，并且磁流变液易沉淀。In "Design and Research of Magneto-rheological Braking Machine for a Certain Artillery" (Machinery Manufacturing and Automation, 2016, No. 5, by Huang Xueqian, pp. 54-57), a magneto-rheological retreating machine is proposed, which uses the excitation coil The damping coefficient of the magnetorheological fluid can be continuously controlled, the energy consumption is low and the response time is short, but the structure is complex, the sealing of the whole device and the control circuit are required to be high, and the magnetorheological fluid is easy to precipitate.
电涡流制退复进装置与常用的一些粘滞制退复进装置相比，不存在漏液和密封的问题，具有结构相对简单、可靠性高等优点，在工程上具有良好广阔的应用前景。电涡流阻尼产生的基本原理是：当非磁性导体在磁场中切割磁力线运动时，会在导体中产生电涡流。根据楞次定律，电涡流同时会产生一个与原磁场方向相反的新磁场，新磁场会产生阻碍二者相对运动的阻尼力，如此可使冲击载荷能量通过导体的电阻热效应被消耗。Compared with some commonly used viscous recoil devices, the eddy current device has no leakage and sealing problems, has the advantages of relatively simple structure and high reliability, and has a good and broad application prospect in engineering. The basic principle of eddy current damping is: when a non-magnetic conductor cuts the magnetic force line in the magnetic field, an eddy current will be generated in the conductor. According to Lenz's law, the eddy current will generate a new magnetic field opposite to the direction of the original magnetic field at the same time, and the new magnetic field will generate a damping force that hinders the relative motion of the two, so that the impact load energy can be consumed through the resistance heating effect of the conductor.
电涡流阻尼器与电涡流制退复进装置的原理相同，一般用于在低速情况下的振动抑制，在一定范围内也能实现缓冲效果。《Modeling and experiments on eddy currentdamping caused by a permanent magnet in a conductive tube》(Journal ofMechanical Science and Technology，2009年，第11期，Bae J S,Hwang J H,Park J S著，3024-3025页)中韩国航空大学Bae提出了一种永磁式圆筒型直线电涡流阻尼器。这种阻尼器利用圆管导体轴向切割磁力线产生电涡流阻尼力来抑制机械装置的轴向振动。但其仅有一组圆柱形永磁体作为磁场发生装置，电涡流耗能效率较低，只适用于抑制低频率的小幅振动或者对较小的冲击载荷进行缓冲。The principle of the eddy current damper is the same as that of the eddy current recoil device. It is generally used for vibration suppression at low speeds, and it can also achieve a buffering effect within a certain range. "Modeling and experiments on eddy currentdamping caused by a permanent magnet in a conductive tube" (Journal of Mechanical Science and Technology, 2009, No. 11, Bae J S, Hwang J H, Park J S, pages 3024-3025), Korea Aerospace University Bae proposed a permanent magnet cylindrical linear eddy current damper. This kind of damper utilizes the circular tube conductor to axially cut the magnetic lines of force to generate eddy current damping force to suppress the axial vibration of the mechanical device. However, it only has a set of cylindrical permanent magnets as a magnetic field generator, and the eddy current energy consumption efficiency is low, so it is only suitable for suppressing low-frequency small vibrations or buffering small impact loads.
专利号为201210238903.4的“一种用于抑制轴向振动的电涡流耗能阻尼器”利用径向充磁的永磁体阵列在电涡流筒周围形成多个磁场，利用电涡流筒在磁场中轴向运动时切割磁力线产生的电涡流发热耗能，同时复位的弹力由两个同极正对的轴向充磁永磁体提供。可用于抑制结构的轴向振动。Patent No. 201210238903.4 "An Eddy Current Energy Dissipating Damper for Suppressing Axial Vibration" uses a radially magnetized permanent magnet array to form multiple magnetic fields around the eddy current cylinder, and uses the eddy current cylinder to move axially in the magnetic field The eddy current generated by cutting the magnetic force line during movement generates heat and consumes energy, while the elastic force for reset is provided by two axially magnetized permanent magnets with the same polarity facing each other. It can be used to suppress the axial vibration of the structure.
发明内容Contents of the invention
本发明所解决的技术问题在于提供一种双层永磁体型轴向电涡流制退复进装置，以解决一般电涡流制退复进装置阻尼系数小、工作效率低的问题。The technical problem to be solved by the present invention is to provide a double-layer permanent magnet type axial eddy current control device to solve the problems of small damping coefficient and low working efficiency of the general eddy current control device.
实现本发明目的的技术解决方案为：The technical solution that realizes the object of the present invention is:
一种双层永磁体型轴向电涡流制退复进装置，包括支撑机构、电涡流阻尼机构和复进机构；A double-layer permanent magnet type axial eddy current restraining and re-advancing device, including a supporting mechanism, an eddy current damping mechanism and a re-advancing mechanism;
所述电涡流阻尼机构包括内层永磁体、外层永磁体、外层导磁块；所述内层永磁体与外层永磁体均为环形圆柱结构，外层永磁体的内径大于内层永磁体的外径，内层永磁体与外层永磁体同轴安装；支撑机构为复进机构提供支撑和移动导向；所述复进机构的圆管位于内层永磁体与外层永磁体之间，圆管与内层永磁体和外层永磁体产生相对运动。The eddy current damping mechanism includes an inner permanent magnet, an outer permanent magnet, and an outer magnetic block; the inner permanent magnet and the outer permanent magnet are both ring-shaped cylindrical structures, and the inner diameter of the outer permanent magnet is larger than that of the inner permanent magnet. The outer diameter of the magnet, the inner permanent magnet and the outer permanent magnet are installed coaxially; the support mechanism provides support and movement guidance for the recoil mechanism; the circular tube of the recoil mechanism is located between the inner permanent magnet and the outer permanent magnet , the circular tube produces relative motion with the inner permanent magnet and the outer permanent magnet.
本发明与现有技术相比，其显著优点：Compared with the prior art, the present invention has significant advantages:
(1)本发明的内、外层永磁体的磁力线构成循环回路，可以较大地增强磁通密度，从而提高阻尼系数，可对发射装置工作时受到的冲击载荷进行缓冲，可以有效减小其后坐位移和复进速度，并实现复进功能。(1) The magnetic field lines of the inner and outer permanent magnets of the present invention form a circulation loop, which can greatly enhance the magnetic flux density, thereby improving the damping coefficient, buffering the impact load received when the launching device works, and effectively reducing its recoil Displacement and re-entry speed, and realize the re-entry function.
(2)本发明的制退复进装置可以通过增加永磁体对数、永磁体磁场强度两种方式增加缓冲器的阻尼系数。(2) The retreating and re-advancing device of the present invention can increase the damping coefficient of the buffer by increasing the logarithm of the permanent magnets and the magnetic field strength of the permanent magnets.
(3)永磁体各部件优选的采用规则的回转体结构，加工容易、成本低。(3) Each component of the permanent magnet preferably adopts a regular rotator structure, which is easy to process and low in cost.
(4)与将轴向运动转化为旋转运动的电涡流缓冲器相比，本发明的制退复进装置径向体积小，占用空间少。(4) Compared with the eddy current buffer which converts axial motion into rotational motion, the retreating and re-advancing device of the present invention has a small radial volume and takes up less space.
(5)把永磁体换成电磁体，同时设计好控制电磁体的电路就可以实现半自动控制。(5) Replace the permanent magnet with an electromagnet, and design a circuit for controlling the electromagnet at the same time to realize semi-automatic control.
下面结合附图对本发明作进一步详细描述。The present invention will be described in further detail below in conjunction with the accompanying drawings.
附图说明Description of drawings
图1为本发明双层永磁体型轴向电涡流制退复进装置实施例1的结构示意图。Fig. 1 is a schematic structural view of Embodiment 1 of a double-layer permanent magnet type axial eddy current control device for retreat and re-advancement according to the present invention.
图2为本发明双层永磁体型轴向电涡流制退复进装置实施例2的结构示意图。Fig. 2 is a structural schematic diagram of Embodiment 2 of the double-layer permanent magnet type axial eddy current preventing and re-advancing device of the present invention.
图3为实施例1和实施例2中永磁体排列方式放大示意图。FIG. 3 is an enlarged schematic diagram of the arrangement of permanent magnets in Embodiment 1 and Embodiment 2. FIG.
具体实施方式detailed description
为了说明本发明的技术方案及技术目的，下面结合附图及具体实施例对本发明做进一步的介绍。In order to illustrate the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.
本发明的一种双层永磁体型轴向电涡流制退复进装置，包括支撑机构、电涡流阻尼机构和复进机构；所述复进机构使圆管11与内层永磁体6和外层永磁体9产生相对运动；A double-layer permanent magnet type axial eddy current restraining and re-advancing device of the present invention includes a support mechanism, an eddy current damping mechanism and a re-advancing mechanism; Layer permanent magnet 9 produces relative movement;
所述电涡流阻尼机构包括内层永磁体6、外层永磁体9、外层导磁块8；所述内层永磁体6与外层永磁体9均为环形圆柱结构，外层永磁体9的内径大于内层永磁体6的外径，内层永磁体6与外层永磁体9同轴安装；所述支撑机构为复进机构提供支撑和移动导向作用；所述复进机构的圆管11位于内层永磁体6与外层永磁体9之间，圆管11与内层永磁体6和外层永磁体9产生相对运动，产生电涡流。The eddy current damping mechanism includes an inner permanent magnet 6, an outer permanent magnet 9, and an outer magnetic block 8; The inner diameter of the inner permanent magnet 6 is greater than the outer diameter of the inner permanent magnet 6, and the inner permanent magnet 6 and the outer permanent magnet 9 are coaxially installed; 11 is located between the inner permanent magnet 6 and the outer permanent magnet 9, and the circular tube 11 generates relative motion with the inner permanent magnet 6 and the outer permanent magnet 9 to generate an eddy current.
结合图3，进一步的，所述内层永磁体6与外层永磁体9结构相同，充磁方向为轴向，均包括永磁体13、导磁块7；所述永磁体13的数量为N(N≥3)，所述导磁块7的数量为N-1；所述永磁体13与导磁块7间隔排列，分别形成内外侧永磁体。In conjunction with Fig. 3, further, the inner layer permanent magnet 6 has the same structure as the outer layer permanent magnet 9, and the magnetization direction is axial, and both include a permanent magnet 13 and a magnetic block 7; the number of the permanent magnets 13 is N (N≥3), the number of the magnetic permeable blocks 7 is N-1; the permanent magnets 13 and the magnetic permeable blocks 7 are arranged at intervals to form inner and outer permanent magnets respectively.
进一步的，可将永磁体13换成电磁体，同时设计好控制电磁体的电路，就可以实现半自动控制。Further, the permanent magnet 13 can be replaced by an electromagnet, and a circuit for controlling the electromagnet can be designed to realize semi-automatic control.
所述内层永磁体6或外层永磁体9，同层的永磁体13同极正对；内层与外层之间相邻的永磁体13之间异极正对，使得内层永磁体6和外层永磁体9磁化方向相反；每个永磁体的磁力线从N极出发，然后在导磁块7的引导下沿最短的路径回到S极，同时每对内、外层永磁体13产生一个垂直通过圆管11的磁场。Described inner layer permanent magnet 6 or outer layer permanent magnet 9, the same pole of permanent magnet 13 of the same layer is opposite; Different poles are opposite between adjacent permanent magnet 13 between inner layer and outer layer, make inner layer permanent magnet 6 and the magnetization direction of the outer permanent magnet 9 are opposite; the magnetic field lines of each permanent magnet start from the N pole, and then return to the S pole along the shortest path under the guidance of the magnetic block 7, and each pair of inner and outer permanent magnets 13 A magnetic field passing through the tube 11 perpendicularly is generated.
优选的，所述导磁块7的内径和外径均与永磁体13相同，导磁块7的作用是引导磁力线通过导磁块7所在区域，增强径向磁通密度；Preferably, the inner diameter and the outer diameter of the magnetic permeable block 7 are the same as those of the permanent magnet 13, and the function of the magnetic permeable block 7 is to guide the magnetic flux through the area where the magnetic permeable block 7 is located, so as to enhance the radial magnetic flux density;
进一步的，所述导磁块7厚度是永磁体13厚度的1.6倍到2倍，以获得最大的径向磁通量；通过计算平均磁通密度和磁通面积的乘积，得到这样径向磁通密度增强效果最好，因为当导磁块7的厚度较小时，平均磁通密度会增大，但是磁通面积会减小，当导磁块7的厚度较大时，磁通面积会增大，但是平均磁通密度减小；Further, the thickness of the magnetic permeable block 7 is 1.6 times to 2 times the thickness of the permanent magnet 13 to obtain the maximum radial magnetic flux; by calculating the product of the average magnetic flux density and the magnetic flux area, such a radial magnetic flux density is obtained The enhancement effect is the best, because when the thickness of the magnetic conduction block 7 is small, the average magnetic flux density will increase, but the magnetic flux area will decrease, and when the thickness of the magnetic conduction block 7 is large, the magnetic flux area will increase, But the average magnetic flux density decreases;
进一步的，所述圆管11与内层永磁体6或外层永磁体9之间的间隙均保持1到2mm的距离，因为圆管11离永磁体13越近，通过圆管11的磁通密度越大，但是同时考虑到零件的加工和安装精度，优选的，圆管11与内层永磁体6或外层永磁体9之间的间隙均保持1到2mm；Further, the distance between the round tube 11 and the inner layer permanent magnet 6 or the outer layer permanent magnet 9 is maintained at a distance of 1 to 2mm, because the closer the round tube 11 is to the permanent magnet 13, the magnetic flux passing through the round tube 11 The greater the density, but at the same time considering the processing and installation accuracy of the parts, preferably, the gap between the round tube 11 and the inner permanent magnet 6 or the outer permanent magnet 9 is maintained at 1 to 2mm;
进一步的，所述永磁体13材料为烧结钕铁硼，所述圆管11材料为紫铜或者其他良好导电良好的材料，所述导磁块7材料为电工软铁或低碳钢等导磁性能良好的材料。Further, the material of the permanent magnet 13 is sintered NdFeB, the material of the round tube 11 is copper or other materials with good electrical conductivity, and the material of the magnetic block 7 is electrical soft iron or low carbon steel with magnetic properties. good material.
所述复进机构包括弹簧3、中间轴1、圆管11、安装轴12；所述支撑机构包括第一端盖2、内筒5、外筒4；The re-entry mechanism includes a spring 3, an intermediate shaft 1, a round pipe 11, and a mounting shaft 12; the support mechanism includes a first end cover 2, an inner cylinder 5, and an outer cylinder 4;
所述外筒4一端与第一端盖2相连，外筒4另一端与安装轴12相连；第一端盖2、外筒4与安装轴12一起构成圆柱形腔体结构；所述电涡流阻尼机构、内筒4、圆管11、弹簧3均安装在圆柱形腔体内；所述圆管11的一端固定安装在安装轴12上；所述中间轴1的一端伸出第一端盖2，并支撑在第一端盖2的中心孔上；中间轴1中间设有圆形凸台，内筒5的一端固定安装在中间轴1中间的凸台上；One end of the outer cylinder 4 is connected to the first end cover 2, and the other end of the outer cylinder 4 is connected to the installation shaft 12; the first end cover 2, the outer cylinder 4 and the installation shaft 12 together form a cylindrical cavity structure; the eddy current The damping mechanism, the inner tube 4, the round tube 11 and the spring 3 are all installed in the cylindrical cavity; one end of the round tube 11 is fixedly mounted on the installation shaft 12; one end of the intermediate shaft 1 protrudes from the first end cover 2 , and supported on the central hole of the first end cover 2; a circular boss is provided in the middle of the intermediate shaft 1, and one end of the inner cylinder 5 is fixedly installed on the boss in the middle of the intermediate shaft 1;
所述内层永磁体6安装在中间轴1的另一端，中间轴1上还安装有锁紧螺母，对内层永磁体6进行轴向固定；所述外层永磁体9安装在内筒5内；内筒5上安装有第二端盖10，第二端盖10对外侧永磁体9进行轴向固定；The inner permanent magnet 6 is installed on the other end of the intermediate shaft 1, and a lock nut is installed on the intermediate shaft 1 to axially fix the inner permanent magnet 6; the outer permanent magnet 9 is installed in the inner cylinder 5 Inside; the inner cylinder 5 is equipped with a second end cover 10, and the second end cover 10 axially fixes the outer permanent magnet 9;
结合图1，本发明的实施例1中，所述安装轴12与外筒4固定安装；中间轴1带动内筒5可在外筒4内滑动，为降低加工和装配难度，内筒(5)外表面两端各有一小段长度与外筒(4)内表面光滑配合；所述弹簧3套在中间轴1上，安装在中间轴1的凸台与第一端盖2之间，对中间轴1在外筒4内的往复运动分别起缓冲和复进作用。1, in Embodiment 1 of the present invention, the installation shaft 12 is fixedly installed with the outer cylinder 4; the intermediate shaft 1 drives the inner cylinder 5 to slide in the outer cylinder 4. In order to reduce the difficulty of processing and assembly, the inner cylinder (5) Both ends of the outer surface have a small section of length that is smoothly matched with the inner surface of the outer cylinder (4); 1 The reciprocating motion in the outer cylinder 4 plays the role of buffering and re-entry respectively.
工作时，安装轴12与外部装置固定，中间轴1在冲击载荷作用下带动内筒5和永磁体13压缩弹簧3，同时永磁体13的磁力线垂直切割圆管11，产生电涡流阻尼力，电涡流阻尼力和弹簧力一起对中间轴1的运动进行缓冲，在此过程中电涡流阻尼机构吸收后坐运动的大量能量，当弹簧3压缩到位时，弹簧3开始推动中间轴1复进，此时永磁体13的磁力线垂直切割圆管11会产生电涡流阻尼力，电涡流阻尼力方向与弹簧力相反，在此过程中电涡流阻力机构吸收后坐运动的大量能量，同时电涡流阻尼力对复进运动实现缓冲作用，可以减小复进到位时的速度，实现复进到位时的平稳性。When working, the installation shaft 12 is fixed with the external device, the intermediate shaft 1 drives the inner cylinder 5 and the permanent magnet 13 to compress the spring 3 under the impact load, and at the same time, the magnetic field line of the permanent magnet 13 cuts the round tube 11 vertically, generating eddy current damping force, and the electric current The eddy current damping force and the spring force together buffer the movement of the intermediate shaft 1. During this process, the eddy current damping mechanism absorbs a large amount of energy of the recoil movement. When the spring 3 is compressed in place, the spring 3 starts to push the intermediate shaft 1 back. At this time The magnetic force line of the permanent magnet 13 cuts the circular tube 11 vertically to generate an eddy current damping force, and the direction of the eddy current damping force is opposite to the spring force. The motion realizes the cushioning effect, which can reduce the speed when the return is in place, and realize the stability when the return is in place.
结合图2，本发明的实施例2中，所述中间轴1固定安装在圆柱形腔体内，中间轴1与外筒4或第一端盖2固定安装；所述安装轴12带动圆管11可在外筒4内滑动；所述弹簧3套在安装圆管11上，在安装轴12内侧端面与第二端盖10之间，对安装轴12在外筒4内的往复运动分别起缓冲和复进作用。Referring to FIG. 2, in Embodiment 2 of the present invention, the intermediate shaft 1 is fixedly installed in the cylindrical cavity, and the intermediate shaft 1 is fixedly installed with the outer cylinder 4 or the first end cover 2; the installation shaft 12 drives the round pipe 11 It can slide in the outer cylinder 4; the spring 3 is sleeved on the installation tube 11, between the inner end surface of the installation shaft 12 and the second end cover 10, respectively buffering and restoring the reciprocating movement of the installation shaft 12 in the outer cylinder 4 into effect.
工作时，中间轴1与外部装置固定，安装轴12在外力作用下带动圆管11、外筒4和第一端盖2一起运动，同时永磁体13的磁力线垂直切割圆管11，产生电涡流阻尼力，在此过程中电涡流阻尼机构吸收后坐运动的大量能量，电涡流阻尼力和弹簧力一起对安装轴12的运动进行缓冲，当弹簧3压缩到位时，弹簧3开始推动安装轴12复进，此时永磁体13的磁力线垂直切割圆管11会产生电涡流阻尼力，电涡流阻尼力方向与弹簧力相反，在此过程中电涡流阻尼机构吸收后坐运动的大量能量，同时电涡流阻尼力对复进运动实现缓冲作用，可以减小复进到位时的速度，实现复进到位时的平稳性。When working, the intermediate shaft 1 is fixed with the external device, and the installation shaft 12 drives the round tube 11, the outer cylinder 4 and the first end cover 2 to move together under the action of external force, and at the same time, the magnetic field lines of the permanent magnet 13 cut the round tube 11 vertically, generating eddy currents Damping force. During this process, the eddy current damping mechanism absorbs a large amount of energy of the recoil movement. The eddy current damping force and the spring force together buffer the movement of the installation shaft 12. When the spring 3 is compressed in place, the spring 3 starts to push the installation shaft 12 back. At this time, the magnetic field line of the permanent magnet 13 cuts the circular tube 11 vertically to generate an eddy current damping force, and the direction of the eddy current damping force is opposite to the spring force. The force has a buffering effect on the re-entry movement, which can reduce the speed when the re-entry is in place, and realize the stability when the re-entry is in place.
以实施例1做说明，使用时，中间轴1一端与发射装置后坐部分通过柱销连接，安装轴12与外部装置固定，中间轴1在发射装置作用下带动内筒5和永磁体13压缩弹簧3，同时永磁体13的磁力线垂直切割圆管11，产生电涡流阻尼力，在此过程中电涡流阻尼机构吸收后坐运动的大量能量，电涡流阻尼力和弹簧力一起对中间轴1的运动进行缓冲，当弹簧3压缩到位时，弹簧3开始推动中间轴1复进，此时永磁体13的磁力线垂直切割圆管11会产生电涡流阻尼力，电涡流阻尼力方向与弹簧力相反，在此过程中电涡流阻尼机构吸收后坐运动的大量能量，同时电涡流阻尼力对发射装置的复进运动实现缓冲作用，可以减小复进到位时的速度，实现复进到位时的平稳性。Taking Example 1 as an illustration, when in use, one end of the intermediate shaft 1 is connected to the recoil part of the launching device through a pin, the installation shaft 12 is fixed with the external device, and the intermediate shaft 1 drives the inner cylinder 5 and the permanent magnet 13 to compress the spring under the action of the launching device 3. At the same time, the magnetic lines of force of the permanent magnet 13 cut the circular tube 11 vertically, generating an eddy current damping force. During this process, the eddy current damping mechanism absorbs a large amount of energy of the recoil motion, and the eddy current damping force and the spring force together carry out the movement of the intermediate shaft 1. Buffering, when the spring 3 is compressed in place, the spring 3 starts to push the intermediate shaft 1 back. At this time, the magnetic force line of the permanent magnet 13 cuts the round tube 11 perpendicularly to generate an eddy current damping force. The direction of the eddy current damping force is opposite to the spring force. Here During the process, the eddy current damping mechanism absorbs a large amount of energy of the recoil motion, and at the same time, the eddy current damping force realizes the buffering effect on the recoil motion of the launching device, which can reduce the speed when reentry is in place, and realize the stability when reentry is in place.
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| CN114934605B (en) * | 2022-04-11 | 2023-05-30 | 广州大学 | Self-resetting friction controllable eddy current composite damping device |
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