A three-directional compound oscillator dynamic vibration absorber and vibration absorbing method

Abstract

The present application relates to the field of machinery, especially to a three-way composite oscillator dynamic vibration absorber and vibration absorbing method. The three-way composite oscillator dynamic vibration absorber comprises an elastic support, the elastic support comprises an elastic support base, the elastic support base has a fixing hole; the elastic support base is further connected with four free ends, the four free ends are arranged with free end base plates; the free end base plates are arranged with mounting holes; a nonlinear oscillator A, a nonlinear oscillator B and a linear oscillator C are combined together to form a special composite oscillator; beneficial effects: the application can realize dynamic vibration absorption and vibration reduction and noise reduction in three mutually orthogonal directions, can work normally in weightlessness, severe and complex environments, can simultaneously adapt to different intensity and multiple angle external excitations, has a wide matching frequency, can effectively absorb the vibration energy of a power device or a mechanical structure, and suppress the vibration and noise generated thereby.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of machinery, in particular to a three-directional compound oscillator dynamic vibration absorber and a vibration absorbing method. BACKGROUND

[0002] In life and production, the power device or mechanical structure is often subjected to internal or external excitation to produce mechanical vibration during operation. In most cases, mechanical vibration will reduce the working performance of the equipment and shorten its service life. Therefore, it is necessary and meaningful to suppress or eliminate harmful vibration of these mechanical equipment.

[0003] According to the generation and propagation of vibration, the control method of vibration is generally divided into suppression of vibration source, vibration isolation and vibration absorption. Among them, the dynamic vibration absorber is a device that uses a resonance system to absorb the vibration energy of an object to reduce the vibration of the object. Its principle is to add a mass-spring resonance system to the vibrating object. The counteracting force generated by this additional system at resonance can weaken the vibration of the vibrating object. Dynamic vibration absorber can be applied in many fields, such as satellites, aircraft, ships, cars, submarines, etc. Dynamic vibration absorber can absorb the mechanical kinetic energy generated by the power system, improve the performance of satellites, aircraft and ships; dynamic vibration absorber can reduce the vibration of the transmission system of the car, so that the car can maintain a good working state and improve the comfort of the ride; dynamic vibration absorber can also control the vibration between the shaft system and the submarine shell, reduce the vibration noise, and make the submarine can play the corresponding function and role.

[0004] In actual operating environment, the power device or mechanical structure does not always run at a specific frequency. For example, external excitation or adjustment and change of its own operating state (working posture, load or rotating speed) may cause variable frequency operation and multi-modal vibration. The traditional dynamic vibration absorber is generally designed for a specific frequency or mode shape. For the random change of vibration frequency and the diversity of mode shape, the single-direction and single-frequency dynamic vibration absorber cannot achieve ideal vibration reduction effect.

[0005] On February 5, 2025, a search was conducted in the China Patent Publication Database with "vibration and three directions and ball and spring" as the abstract keyword, and the synonym expansion was checked. No relevant literature was found.

[0006] On February 5, 2025, a search was conducted in the China Patent Publication Database with "vibration and three directions and ball and spring" as the abstract keyword, and the synonym expansion was checked. No relevant literature was found.

[0007] On February 5, 2025, a search was conducted on the United States Patent and Trademark Office website with "Vibration absorption with three-way with ball with spring" and no relevant documents were found; search website https: / / ppubs.uspto.gov / pubwebapp / .

[0008] On February 5, 2025, a search was conducted on WIPO's https: / / patentscope2.wipo.int / with "Vibration absorption and three-way and ball and spring" and found CN210600370 A low-power four-bit three-way ball valve.

[0009] and the spirit of the present patent.

[0010] On February 5, 2025, a search was conducted on the Japanese Patent Office website https: / / www.j-platpat.inpit.go.jp / with "Vibration absorption and three-way and ball and spring" and no relevant documents were found. SUMMARY

[0011] The purpose of the invention is to provide a three-way composite vibrator dynamic vibration absorber and vibration absorption method with better effect, and the specific purpose is the multiple substantial technical effects in the specific implementation part.

[0012] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0013] A three-way composite vibrator dynamic vibration absorber, characterized in that the three-way composite vibrator dynamic vibration absorber comprises an elastic support 3, and the elastic support 3 comprises an elastic support base 1, wherein the elastic support base 1 has a fixing hole 2;

[0014] The elastic support base 1 is also connected with four free ends, and the four free ends are arranged with a free end base plate 4; the free end base plate 4 is arranged with a mounting hole;

[0015] The stud 94 passes through the mounting hole, the conical coil spring 10 and the slotted metal column 9 in sequence; the slotted metal column 9 is fixedly installed at the bottom of the mounting hole, and the top of the slotted metal column 9 is limited by the stud;

[0016] It also comprises a double-stranded metal wire 93, and the ends of the double-stranded metal wire 93 are arranged in the slot of the slotted metal column 9, i.e. the two ends of the double-stranded metal wire are wound and bound to the annular slot of the slotted metal column, and the double-stranded metal wire 93 passes through the center hole metal ball;

[0017] The cylindrical spiral spring limits the center hole metal ball in the middle position of the twisted metal wire.

[0018] The further technical solution of the present application is that the four free ends are symmetrically arranged in V-shaped structure.

[0019] The further technical solution of the present application is that the conical spiral spring and the slotted metal column form a nonlinear oscillator A.

[0020] The further technical solution of the present application is that the twisted metal wire and the center hole metal ball form a nonlinear oscillator B; the cylindrical spiral spring and the center hole metal ball form a linear oscillator C.

[0021] The further technical solution of the present application is that in the case of large vibration intensity, the two groups of center hole metal balls can impact and collide with each other to realize impact damping effect.

[0022] The further technical solution of the present application is that the nonlinear oscillator A, the nonlinear oscillator B and the linear oscillator C are connected together through the orthogonal V-shaped elastic support to form a composite oscillator, which can absorb, reduce and reduce noise in three mutually orthogonal directions.

[0023] The further technical solution of the present application is that the nonlinear oscillator B and the linear oscillator C each contain two groups.

[0024] The further technical solution of the present application is that the mounting base to the four free ends is designed as variable cross section, the minimum width of the free end is 1 / 2 of the width of the base part, and has the characteristics of geometric nonlinearity, and the bending stiffness can change with the force of the nonlinear oscillator.

[0025] The further technical solution of the present application is that the conical spiral spring of the nonlinear oscillator A is pre-compressed, and the compression amount is 1 / 4 of the original length.

[0026] The twisted metal wire of the oscillator B needs to be tensioned to be in a slightly tight state; the cylindrical spiral spring of the oscillator C needs to be pre-compressed, and the compression amount is 1 / 4 of the original length.

[0027] A vibration absorbing method of a three-direction composite oscillator dynamic vibration absorber, characterized in that the three-direction composite oscillator dynamic vibration absorber of any one of the above is used.

[0028] The nonlinear oscillator A can adapt to a wider working frequency band and still has a certain vibration absorbing effect when excited by multiple frequencies.

[0029] The nonlinear oscillator B has the nonlinear characteristics of cubic stiffness and can absorb vibration energy in a wider frequency range.

[0030] The two groups of cylindrical spiral springs are connected in series, on the one hand, the center hole metal ball is limited in the middle position of the double-stranded metal wire, on the other hand, the center hole metal ball and the center hole metal ball form a linear oscillator C, so that it can freely vibrate on the double-stranded metal wire, and through reasonable frequency design, it is suitable for the vibration damping object of a specific frequency.

[0031] The nonlinear oscillator A, the nonlinear oscillator B and the linear oscillator C are combined together to form a special composite oscillator, which can realize vibration absorption, vibration reduction and noise reduction in three mutually orthogonal directions, wherein the Z direction is the main vibration reduction direction, the vibration absorption and vibration reduction effect is best, and the X and Y directions are the secondary vibration reduction directions, and the effect is second;

[0032] During the movement of the double-stranded metal wire, the relative sliding between the two metal wires generates frictional damping, and the vibration energy is dissipated; when the Z direction amplitude is too large, the two center hole metal balls will collide with each other, forming impact damping, which can further dissipate vibration energy.

[0033] The application has the following beneficial effects relative to the prior art: the application can realize power vibration absorption and vibration reduction in three mutually orthogonal directions, can work normally in weightlessness, severe and complex environments, can simultaneously adapt to different intensity and multiple angle external excitations, has a wide matching frequency, can effectively absorb the vibration energy of a power device or a mechanical structure, and suppress the vibration and noise generated thereby. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to further illustrate the application, the following further illustrates the application in conjunction with the drawings:

[0035] Figure 1 It is a three-dimensional structure schematic diagram of the application;

[0036] Figure 2 It is another perspective structure schematic diagram of the application;

[0037] Figure 3 It is still another perspective structure schematic diagram of the application;

[0038] Figure 4 It is a layout diagram of the conical spiral spring of the application;

[0039] Figure 5 It is a three-direction coordinate schematic diagram of the application;

[0040] Wherein: 1. elastic support base; 2. fixed hole; 3. elastic support; 4. free end base plate; 5. cylindrical spiral spring one; 6. cylindrical spiral spring two; 7 center hole metal ball one; 8. center hole metal ball two; 9 slotted metal column; 10 conical spiral spring; 91. upper part of slotted metal column; 92. lower part of slotted metal column; 93. double-stranded metal wire; 94. pin. DETAILED DESCRIPTION

[0041] The application will be further clarified by a consideration of the following detailed description taken in connection with the accompanying drawings and specific embodiments. It is understood that the following detailed description is merely exemplary and is not intended to limit the scope of the application. In the description of the application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", and the like are used herein for convenience and are not intended to indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation. Therefore, these terms are used herein and in the following claims merely to describe particular embodiments and are in no way intended to limit the scope of the present application. Furthermore, the terms "mount", "connected", "connecting", unless specifically stated and limited otherwise, are used broadly and encompass both direct and indirect connections, as well as fixed and movable connections. The terms "mount", "connected", "connecting", unless specifically stated and limited otherwise, are used broadly and encompass both direct and indirect connections, as well as fixed and movable connections. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] It should be noted that in this document, relational terms such as first and second, and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0043] The present patent provides a variety of parallel schemes. Different expressions belong to improved schemes or parallel schemes based on the basic scheme. Each scheme has its own unique features. In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict between them. The fixing mode not described in the text can be any one of the fixing modes such as threaded fixing, bolt fixing, welding or glue bonding.

[0044] Embodiment one: in combination with all the drawings; a three-way composite vibrator dynamic vibration absorber, characterized in that the three-way composite vibrator dynamic vibration absorber comprises an elastic support 3, the elastic support 3 comprises an elastic support base 1, the elastic support base 1 has a fixing hole 2;

[0045] The elastic support base 1 is also connected with four free ends, and the four free ends are arranged with free end base plates 4; the free end base plates 4 are arranged with mounting holes;

[0046] The pin 94 passes through the mounting hole, the conical coil spring 10 and the slotted metal column 9 in turn; the bottom of the slotted metal column 9 is fixedly provided with the mounting hole, and the top of the slotted metal column 9 is limited by the pin;

[0047] The double-twisted metal wire 93 is further provided, and the ends of the double-twisted metal wire 93 are arranged in the slot of the slotted metal column 9, that is, the two ends of the double-twisted metal wire are wound and bound to the annular slot of the slotted metal column, and the double-twisted metal wire 93 passes through the center hole metal ball;

[0048] The cylindrical coil spring limits the center hole metal ball at the middle position of the double-twisted metal wire.

[0049] The technical effects and implementation process of the technical solution and the basic functions are as follows:

[0050] A vibration absorbing method of a three-direction composite oscillator dynamic vibration absorber, characterized in that the three-direction composite oscillator dynamic vibration absorber of any one of the above is used;

[0051] The nonlinear oscillator A can adapt to a wide working frequency band and still has a certain vibration absorbing effect when being excited by multiple frequencies;

[0052] The nonlinear oscillator B has a cubic stiffness nonlinear characteristic and can absorb vibration energy in a wide frequency range;

[0053] The two cylindrical coil springs are connected in series, which limits the center hole metal ball at the middle position of the double-twisted metal wire, and on the other hand, the center hole metal ball and the cylindrical coil spring form a linear oscillator C, so that the linear oscillator C can freely vibrate on the double-twisted metal wire, and through reasonable frequency design, the linear oscillator C can adapt to a specific frequency of a vibration reduction object.

[0054] The nonlinear oscillator A, the nonlinear oscillator B and the linear oscillator C are combined together to form a special composite oscillator, which can realize vibration absorption, vibration reduction and noise reduction in three mutually orthogonal directions, wherein the Z direction is the main vibration reduction direction, the vibration absorption and reduction effect is best, and the X and Y directions are the auxiliary vibration reduction directions, the effect is second.

[0055] During the movement of the double-twisted metal wire, the relative sliding between the two metal wires generates frictional damping to dissipate vibration energy; when the Z direction amplitude is too large, the two center hole metal balls will collide with each other to form impact damping, which can further dissipate vibration energy.

[0056] When used, the patent is fixed on the related mechanical equipment through the base 1 and / or the fixing hole 2. The dynamic vibration absorber can adapt to complex environments such as weightlessness, extreme temperature, corrosion, wide frequency and multiple modes, and is generally installed in a power device or a mechanical structure, such as a satellite, an aircraft, a ship, a car, a submarine and the like, and can realize passive vibration absorption and reduction without additional equipment.

[0057] Embodiment two: as a further improved scheme or parallel scheme or alternative independent scheme, four free ends are arranged in a V-shaped structure two by two symmetrically. The essential technical effect and implementation process of the technical solution herein and the basic function are as follows: the structure can realize multi-angle and multi-dimensional vibration reduction, and the deformation ability of the structure itself can also improve the vibration reduction effect.

[0058] Embodiment three: as a further improved scheme or parallel scheme or alternative independent scheme, a conical spiral spring and a slotted metal column form a nonlinear oscillator A. The double-stranded metal wire and the center hole metal ball form a nonlinear oscillator B; a cylindrical spiral spring and a center hole metal ball form a linear oscillator C.

[0059] Embodiment four: as a further improved scheme or parallel scheme or alternative independent scheme, in the case of greater vibration intensity, the two groups of center hole metal balls can collide with each other to realize impact damping effect. The nonlinear oscillator A, the nonlinear oscillator B and the linear oscillator C are connected together through the orthogonal V-shaped elastic support to form a composite oscillator, which can not only absorb vibration but also reduce vibration and noise in three mutually orthogonal directions.

[0060] Embodiment five: as a further improved scheme or parallel scheme or alternative independent scheme, the oscillator B and the linear oscillator C each contain two groups.

[0061] The elastic support described in the application is an orthogonal V-shaped structure, the mounting base to the four free ends is designed as a variable cross-section, the minimum width of the free end is 1 / 2 of the width of the base part, and the elastic support has the characteristics of geometric nonlinearity, and the bending stiffness can change with the force of the nonlinear oscillators A and B.

[0062] The conical spiral spring and the slotted metal column form a nonlinear oscillator A, which can adapt to a wide working frequency band and still has a certain vibration absorption effect when excited by multiple frequencies.

[0063] The double-stranded metal wire and the center hole metal ball form a nonlinear oscillator B, which has the nonlinear characteristics of cubic stiffness and can form an "energy absorption trap" to absorb vibration energy in a wide frequency range.

[0064] The two groups of cylindrical spiral springs are connected in series, which can limit the center hole metal ball to the middle position of the double-stranded metal wire, and on the other hand, the center hole metal ball and the cylindrical spiral spring form a linear oscillator C, so that the center hole metal ball can freely vibrate on the double-stranded metal wire, and through reasonable frequency design, the linear oscillator C can adapt to a specific frequency vibration reduction object.

[0065] The vibrator A, B and C are combined by the elastic support to form a special composite vibrator, which can realize vibration absorption, vibration reduction and noise reduction in three mutually orthogonal directions, wherein the Z direction is the main vibration reduction direction, the vibration absorption and reduction effect is best, and the X and Y directions are the secondary vibration reduction directions.

[0066] The elastic support base has a fixing hole, four free ends have mounting holes, the column pin is fixedly connected to the fixing hole, the slotted metal column and the conical coil spring are sequentially installed in the column pin from top to bottom, the double-stranded metal wire passes through the center hole of the center hole metal ball, the cylindrical coil spring limits the center hole metal ball at the middle position of the double-stranded metal wire, and the double-stranded metal wire is wound and bound to the annular groove of the slotted metal column at two ends.

[0067] The vibration absorber is a symmetrical structure, the elastic support, the column pin, the conical coil spring, the cylindrical coil spring and the double-stranded metal wire are all metal materials, the conical coil spring and the slotted metal column form a nonlinear spring mass vibrator A, the double-stranded metal wire and the center hole metal ball form a nonlinear spring mass vibrator B, the cylindrical coil spring and the center hole metal ball form a linear vibrator C, the vibrator A, B and C are combined by the elastic support to form a composite vibrator, which can realize vibration absorption, vibration reduction and noise reduction in three mutually orthogonal directions, wherein the Z direction is the main vibration reduction direction, the vibration absorption and reduction effect is best, and the X and Y directions are the secondary vibration reduction directions, and the effect is secondary.

[0068] The double-stranded metal wire and the center hole metal ball form a spring mass vibrator with cubic stiffness to form an energy absorption trap, which can absorb vibration energy in a wide frequency range; in the movement process of the double-stranded metal wire, the relative sliding between the two metal wires generates frictional damping to dissipate vibration energy; when the Z direction amplitude is too large, the two center hole metal balls will collide with each other to form impact damping, which can further dissipate vibration energy.

[0069] In the combination assembly, the conical coil spring of the vibrator A needs to be pre-compressed, the compression amount is 1 / 4 of the original length; the double-stranded metal wire of the vibrator B needs to be tensioned to be in a slightly tight state; the cylindrical coil spring of the vibrator C needs to be pre-compressed, and the compression amount is 1 / 4 of the original length.

[0070] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, the above examples and descriptions in the specification are only to illustrate the principle of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of protection.

Claims

1. A three-dimensional composite oscillator dynamic vibration absorber, characterized in that, The three-dimensional composite oscillator dynamic vibration absorber includes an elastic support (3), the elastic support (3) includes an elastic support base (1), and the elastic support base (1) has a fixing hole (2). The elastic support base (1) is also connected to four free ends, and the four free ends are provided with free end base plates (4); the free end base plates (4) are provided with mounting holes; The pin (94) passes through the mounting hole, the conical helical spring (10) and the slotted metal post (9) in sequence; the bottom of the slotted metal post (9) is provided with a mounting hole, and the top of the slotted metal post (9) is restricted by the pin; It also includes a twisted metal wire (93), the ends of which are arranged in the slots of the slotted metal post (9), the two ends of which are wrapped and bound to the annular slots of the slotted metal post, and the twisted metal wire (93) passes through the central perforated metal ball. The cylindrical helical spring limits the metal ball with the central opening to the middle position of the twisted metal wire.

2. The three-dimensional composite oscillator dynamic vibration absorber as described in claim 1, characterized in that, The four free ends are arranged in a V-shaped structure with two pairs of symmetrical ends.

3. The three-dimensional composite oscillator dynamic vibration absorber as described in claim 1, characterized in that, A nonlinear oscillator A is composed of a conical helical spring and a slotted metal column.

4. The three-dimensional composite oscillator dynamic vibration absorber as described in claim 3, characterized in that: The twisted metal wire and the centrally perforated metal ball form a nonlinear oscillator B; the cylindrical helical spring and the centrally perforated metal ball form a linear oscillator C.

5. A three-dimensional composite oscillator dynamic vibration absorber as described in claim 1, characterized in that, Under conditions of high vibration intensity, the two sets of centrally perforated metal spheres can impact and collide with each other, achieving an impact damping effect.

6. A three-dimensional composite oscillator dynamic vibration absorber as described in claim 4, characterized in that, Nonlinear oscillator A, nonlinear oscillator B, and linear oscillator C are connected together by an orthogonal V-shaped elastic support to form a composite oscillator, which can absorb vibration, reduce vibration, and reduce noise in three mutually orthogonal directions.

7. A three-dimensional composite oscillator dynamic vibration absorber as described in claim 4, characterized in that, The nonlinear oscillator B and the linear oscillator C each contain two sets.

8. A three-dimensional composite oscillator dynamic vibration absorber as described in claim 4, characterized in that, The mounting base to the four free ends is a variable cross-section design, with the minimum width of the free ends being 1 / 2 of the width of the base portion. It has geometric nonlinear characteristics, and its bending stiffness can change with the magnitude of the force applied by the nonlinear oscillator.

9. A three-dimensional composite oscillator dynamic vibration absorber as described in claim 4, characterized in that, The conical helical spring of the nonlinear oscillator A is pre-compressed, and the compression is 1 / 4 of its original length. The twisted metal wires of the nonlinear oscillator B need to be tensioned to bring them to a slightly taut state; the cylindrical helical spring of the linear oscillator C needs to be pre-compressed by 1 / 4 of its original length.

10. A vibration absorption method for a three-dimensional composite oscillator dynamic vibration absorber, characterized in that, The triaxial composite oscillator dynamic vibration absorber according to any one of claims 1-9; The nonlinear oscillator A can adapt to a wide operating frequency band and still has a certain vibration absorption effect when excited by multiple frequencies. The nonlinear oscillator B has a nonlinear characteristic of cubic stiffness, which enables it to absorb vibration energy over a wide frequency range. The two sets of cylindrical helical springs are connected in series. On the one hand, they restrict the metal ball with the central opening to the middle position of the twisted metal wire. On the other hand, they form a linear oscillator C with the metal ball with the central opening, so that it can vibrate freely on the twisted metal wire. Through reasonable frequency design, it can be adapted to the vibration reduction object at a specific frequency. Nonlinear oscillator A, nonlinear oscillator B, and linear oscillator C are combined to form a special composite oscillator that can absorb vibration, reduce vibration, and reduce noise in three mutually orthogonal directions. The Z direction is the main vibration reduction direction, with the best vibration absorption and reduction effect, while the X and Y directions are the secondary vibration reduction directions, with the second best effect. During the movement of the twisted metal wires, the relative slippage between the two metal wires generates frictional damping, which dissipates vibrational energy. When the amplitude in the Z direction is too large, the two metal balls with central openings will collide with each other, forming impact damping, which can further dissipate vibrational energy.

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