Three-way composite vibrator dynamic vibration absorber and vibration absorbing method

Abstract

The invention relates to the field of machinery, in particular to a three-way composite vibrator dynamic vibration absorber and a vibration absorbing method. The three-way composite vibrator dynamic vibration absorber comprises an elastic support, the elastic support comprises an elastic support base, and the elastic support base is provided with a fixing hole. The elastic support base is further connected with four free ends, and free end foundation plates are arranged at the four free ends. Mounting holes are formed in the free end foundation plate; the nonlinear oscillator A, the nonlinear oscillator B and the linear oscillator C are combined together to form a special composite oscillator; the vibration absorber has the beneficial effects that dynamic vibration absorption and vibration and noise reduction can be realized in three mutually orthogonal directions, the vibration absorber can normally work in weightlessness, severe and complex environments, can simultaneously adapt to external excitation with different intensities and multiple angles, has a relatively wide matching frequency, can effectively absorb vibration energy of a power device or a mechanical structure, and has a good application prospect. And vibration and noise generated thereby are suppressed.

Description

Technical Field

[0001] The invention relates to the field of machinery, and in particular to a three-way composite vibrator dynamic vibration absorber and a vibration absorption method. Background Art

[0002] In daily life and production, power devices or mechanical structures are often subjected to internal or external excitations during operation, which can cause mechanical vibrations. In most cases, mechanical vibrations can reduce the performance of the equipment and shorten its service life. Therefore, it is necessary and meaningful to suppress or eliminate harmful vibrations of these mechanical equipment.

[0003] According to the generation and propagation mode of vibration, the vibration control methods are usually divided into vibration source suppression, 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. The principle is to attach a mass spring resonance system to the vibrating object. The reaction force generated by this additional system during resonance can reduce the vibration of the vibrating object. Dynamic vibration absorbers can be used in many fields, such as satellites, aircraft, ships, cars, submarines, etc. Dynamic vibration absorbers can absorb the mechanical kinetic energy generated by the power system to improve the performance of satellites, aircraft and ships; dynamic vibration absorbers can reduce the vibration of the automobile transmission system, so that the car maintains a good working condition and improves the riding comfort; dynamic vibration absorbers can also control the vibration between the shaft system and the submarine hull, reduce vibration noise, and enable the submarine to play its corresponding functions and roles.

[0004] In the actual operating environment, the power device or mechanical structure does not always operate at a specific frequency. If the external excitation or the adjustment and change of its own operating state (working posture, load or speed) occurs, variable frequency operation and multi-modal vibration are likely to occur. Traditional dynamic vibration absorbers are generally designed for specific frequencies or vibration modes. For complex working conditions such as random changes in vibration frequency and the diversity of vibration modes, unidirectional and single-frequency dynamic vibration absorbers cannot achieve ideal vibration reduction effects.

[0005] On February 5, 2025, a search was conducted in the Chinese Patent Publication Database with "vibration absorption and three-way and ball and spring" as the abstract keywords and the option of allowing synonym expansion was checked, but no relevant literature was found.

[0006] On February 5, 2025, an abstract search for "vibration absorption and three-way and ball and spring" was conducted on China National Knowledge Infrastructure, and no relevant literature was found.

[0007] On February 5, 2025, a search was conducted on the website of the United States Patent and Trademark Office for “Vibration absorption with three-way with ball withspring”, and no relevant literature was found; the search URL was https: / / ppubs.uspto.gov / pubwebapp / .

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

[0009] Completely different from the concept of this patent.

[0010] On February 5, 2025, a search was conducted on the Japan Patent Office website https: / / www.jp l atpat.inpit.go.jp / for “Vibration absorption and three-way and ball and spring”, but no relevant literature was found. Summary of the invention

[0011] Purpose of the invention: To provide a three-way composite vibrator dynamic vibration absorber and vibration absorption method with better effect. The specific purpose can be seen in the multiple substantial technical effects of the specific implementation part.

[0012] In order to achieve the above purpose, the present invention adopts the following technical solutions:

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

[0014] The elastic bracket base 1 is also connected to 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;

[0015] The pin 94 passes through the mounting hole, the conical coil spring 10 and the slotted metal column 9 in sequence; the bottom of the slotted metal column 9 is fixed to the mounting hole, and the top of the slotted metal column 9 is restricted by the pin;

[0016] It also includes a twisted pair of metal wires 93, the ends of which are arranged in the slots of the slotted metal column 9, that is, the two ends of the twisted pair of metal wires are wound and bound to the annular grooves of the slotted metal column, and the twisted pair of metal wires 93 pass through the central hole metal ball;

[0017] The cylindrical helical spring holds the centrally-opened metal ball in the middle of the twisted metal wires.

[0018] A further technical solution of the present invention is that the four free ends are symmetrically arranged in pairs in a V-shaped structure.

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

[0020] A further technical solution of the present invention is that the twisted metal wire and the metal ball with a central hole form a nonlinear oscillator B; the cylindrical helical spring and the metal ball with a central hole form a linear oscillator C.

[0021] A further technical solution of the present invention is that, when the vibration intensity is relatively high, the two groups of metal balls with central holes can impact and collide with each other to achieve an impact damping effect.

[0022] A further technical solution of the present invention is that the nonlinear vibrator A, the nonlinear vibrator B and the linear vibrator C are connected together by an orthogonal V-shaped elastic bracket to form a composite vibrator, which can absorb vibration, reduce vibration and reduce noise in three mutually orthogonal directions.

[0023] A further technical solution of the present invention is that the nonlinear oscillator B and the linear oscillator C each include two groups.

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

[0025] A further technical solution of the present invention is that the conical helical spring of the nonlinear vibrator A is pre-compressed, and the compression amount is 1 / 4 of its original length;

[0026] The twisted pair of metal wires of vibrator B needs to be tensioned to put them in a slightly taut state; the cylindrical helical spring of vibrator C needs to be pre-compressed to 1 / 4 of its original length.

[0027] A vibration absorbing method of a three-way composite vibrator dynamic vibration absorber, characterized by using the three-way composite vibrator dynamic vibration absorber as described in any one of the above;

[0028] The nonlinear oscillator A can adapt to a wider working frequency band and still has a certain vibration absorption 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 wide frequency range;

[0030] The two groups of cylindrical helical springs are connected in series, which, on the one hand, restrict the central hole metal ball to the middle position of the twisted metal wire, and on the other hand, form a linear oscillator C with the central hole metal ball, so that it can vibrate freely on the twisted metal wire, and can be adapted to the vibration reduction object of a specific frequency through reasonable frequency design.

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

[0032] When the twisted pair of metal wires are in motion, the relative slip between the two metal wires produces friction damping, which dissipates the vibration energy; when the Z-axis amplitude is too large, the two metal balls with central holes will collide with each other, forming impact damping, which can further dissipate the vibration energy.

[0033] The present invention adopting the above technical solution has the following beneficial effects compared with the prior art: the present application can realize dynamic vibration absorption and vibration reduction and noise reduction in three mutually orthogonal directions, can work normally in weightlessness, harsh and complex environments, can adapt to external excitations of different intensities and multiple angles at the same time, has a wide matching frequency, can effectively absorb the vibration energy of the power device or mechanical structure, and suppress the vibration and noise generated thereby. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to further illustrate the present invention, the following is further described in conjunction with the accompanying drawings:

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

[0036] Figure 2 A structural schematic diagram of another perspective of the invention;

[0037] Figure 3 A structural schematic diagram of another perspective of the invention;

[0038] Figure 4 The arrangement diagram of the conical helical spring of the invention;

[0039] Figure 5 A schematic diagram of the three-dimensional coordinates of the invention;

[0040] Among them: 1. Elastic bracket base; 2. Fixing hole; 3. Elastic bracket; 4. Free end base plate; 5. One cylindrical coil spring; 6. Two cylindrical coil springs; 7. One center hole metal ball; 8. Two center hole metal balls; 9. Slotted metal column; 10 Conical coil spring; 91. Upper part of slotted metal column; 92. Lower part of slotted metal column; 93. Twisted metal wire; 94. Column pin. DETAILED DESCRIPTION

[0041] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] This patent provides a variety of parallel solutions. The different expressions are improved solutions or parallel solutions based on the basic solution. Each solution has its own unique characteristics. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The fixing method not described in the text can be any fixing method such as thread fixing, bolt fixing, welding or glue bonding.

[0044] Embodiment 1: 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 bracket 3, the elastic bracket 3 comprises an elastic bracket base 1, and the elastic bracket base 1 has a fixing hole 2;

[0045] The elastic bracket 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;

[0046] The pin 94 passes through the mounting hole, the conical coil spring 10 and the slotted metal column 9 in sequence; the bottom of the slotted metal column 9 is fixed to the mounting hole, and the top of the slotted metal column 9 is restricted by the pin;

[0047] It also includes a twisted pair of metal wires 93, the ends of which are arranged in the slots of the slotted metal column 9, that is, the two ends of the twisted pair of metal wires are wound and bound to the annular grooves of the slotted metal column, and the twisted pair of metal wires 93 pass through the central hole metal ball;

[0048] The cylindrical helical spring holds the centrally-opened metal ball in the middle of the twisted metal wires.

[0049] The substantial technical effects and implementation process of the technical solution hereof, i.e. the basic functions, are as follows:

[0050] A vibration absorbing method of a three-way composite vibrator dynamic vibration absorber, characterized by using the three-way composite vibrator dynamic vibration absorber as described in any one of the above;

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

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

[0053] The two groups of cylindrical helical springs are connected in series, which, on the one hand, restrict the central hole metal ball to the middle position of the twisted metal wire, and on the other hand, form a linear oscillator C with the central hole metal ball, so that it can vibrate freely on the twisted metal wire, and can be adapted to the vibration reduction object of a specific frequency through reasonable frequency design.

[0054] The nonlinear vibrator A, nonlinear vibrator B and linear vibrator C are combined to form a special composite vibrator, which can achieve vibration absorption, vibration reduction and noise reduction in three mutually orthogonal directions, among which the Z direction is the main vibration reduction direction with the best vibration absorption and vibration reduction effect, and the X and Y directions are the secondary vibration reduction directions with the second best effect;

[0055] When the twisted pair of metal wires are in motion, the relative slip between the two metal wires produces friction damping, which dissipates the vibration energy; when the Z-axis amplitude is too large, the two metal balls with central holes will collide with each other, forming impact damping, which can further dissipate the vibration energy.

[0056] When in use, the patent is fixed on the relevant mechanical equipment through the base 1 and / or the fixing hole 2. The dynamic vibration absorber of the present invention can adapt to the complex environment of weightlessness, extreme temperature, corrosion, wide frequency and multi-mode, and is generally installed in power devices or mechanical structures, such as satellites, aircraft, ships, automobiles, submarines and other parts with high vibration intensity, and can achieve passive vibration absorption and vibration reduction without additional equipment.

[0057] Embodiment 2: As a further improved solution or parallel solution or optional independent solution, the four free ends are symmetrically arranged in pairs in a V-shaped structure. The substantial technical effect and implementation process of the technical solution here, i.e., the basic function, are as follows: the structure can achieve multi-angle and multi-dimensional vibration reduction, and its own deformation ability can also improve the vibration reduction effect.

[0058] Embodiment 3: As a further improved solution or parallel solution or optional independent solution, the conical helical spring and the slotted metal column form a nonlinear vibrator A. The twisted metal wire and the central hole metal ball form a nonlinear vibrator B; the cylindrical helical spring and the central hole metal ball form a linear vibrator C.

[0059] Embodiment 4: As a further improved solution or parallel solution or optional independent solution, when the vibration intensity is large, the two groups of central hole metal balls can impact and collide with each other to achieve impact damping effect. Nonlinear vibrator A, nonlinear vibrator B and linear vibrator C are connected together through orthogonal V-shaped elastic brackets to form a composite vibrator, which can absorb vibration, reduce vibration and reduce noise in three mutually orthogonal directions.

[0060] Embodiment 5: As a further improved solution or a parallel solution or an optional independent solution, the vibrator B and the linear vibrator C each include two groups.

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

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

[0063] The twisted pair of metal wires and the central hole metal ball form a nonlinear oscillator B. This design has the nonlinear characteristics of cubic stiffness and can form an "energy absorption trap" that can absorb vibration energy in a wider frequency range.

[0064] The two groups of cylindrical helical springs are connected in series, which, on the one hand, restrict the central hole metal ball to the middle position of the twisted metal wire, and on the other hand, form a linear oscillator C with the central hole metal ball, so that it can vibrate freely on the twisted metal wire, and can be adapted to the vibration reduction object of a specific frequency through reasonable frequency design.

[0065] The vibrators A, B, and C described in the present invention are combined together through an elastic bracket to form a special composite vibrator, which can achieve vibration absorption, vibration reduction and noise reduction in three mutually orthogonal directions, among which the Z direction is the main vibration reduction direction with the best vibration absorption and vibration reduction effects, and the X and Y directions are auxiliary vibration reduction directions with the second best effects.

[0066] The elastic bracket base has a fixing hole and 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 on the column pin from top to bottom. The twisted metal wire passes through the center hole of the central hole metal ball. The cylindrical coil spring limits the central hole metal ball to the middle position of the twisted metal wire. Both ends of the twisted metal wire are wrapped and bound to the annular groove of the slotted metal column.

[0067] The vibration absorber is a symmetrical structure, wherein the elastic support, column pin, conical coil spring, cylindrical coil spring and twisted metal wire are all made of metal; the conical coil spring and the slotted metal column constitute a nonlinear spring mass vibrator A, the twisted metal wire and the central hole metal ball constitute a nonlinear spring mass vibrator B, the cylindrical coil spring and the central hole metal ball constitute a linear vibrator C, and the vibrators A, B and C are combined together through 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 with the best vibration absorption and vibration reduction effects, and the X and Y directions are the secondary vibration reduction directions with the second best effects.

[0068] The twisted pair of metal wires and the metal ball with a central hole form a spring mass oscillator with cubic stiffness, constituting an "energy absorption trap" that can absorb vibration energy over a wide frequency range. During the movement of the twisted pair of metal wires, the relative slip between the two metal wires produces friction damping, dissipating vibration energy. When the Z-axis amplitude is too large, the two metal balls with a central hole will collide with each other, forming impact damping, which can further dissipate vibration energy.

[0069] In the combined assembly of this scheme, the conical helical spring of vibrator A needs to be pre-compressed to 1 / 4 of its original length; the twisted pair metal wire of vibrator B needs to be tensioned to put it in a slightly tensioned state; and the cylindrical helical spring of vibrator C needs to be pre-compressed to 1 / 4 of its original length.

[0070] The basic principle, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the protection required.

Claims

1. 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), and the elastic support base (1) has a fixing hole (2); The elastic support base (1) is also connected to four free ends, and free end base plates (4) are arranged at the four free ends; the free end base plates (4) are arranged with mounting holes; The column pin (94) passes through the mounting hole, the conical coil spring (10) and the slotted metal column (9) in sequence; the bottom of the slotted metal column (9) is fixed to the mounting hole, and the top of the slotted metal column (9) is restricted by the column pin; It also includes a twisted pair of metal wires (93), the ends of which are arranged in the grooves of the slotted metal column (9), that is, the two ends of the twisted pair of metal wires are wound and bound to the annular grooves of the slotted metal column, and the twisted pair of metal wires (93) pass through the central hole metal ball; The cylindrical helical spring holds the centrally-opened metal ball in the middle of the twisted metal wires.

2. A three-way composite vibrator dynamic vibration absorber as claimed in claim 1, characterized in that: The four free ends are arranged symmetrically in pairs in a V-shaped structure.

3. A three-way composite vibrator dynamic vibration absorber as claimed in claim 1, characterized in that: The conical coil spring and the slotted metal column form a nonlinear oscillator A.

4. A three-way composite vibrator dynamic vibration absorber as claimed in claim 1 or 3, characterized in that: The twisted metal wire and the metal ball with a central hole form a nonlinear oscillator B; the cylindrical helical spring and the metal ball with a central hole form a linear oscillator C.

5. A three-way composite vibrator dynamic vibration absorber as claimed in claim 1, characterized in that: When the vibration intensity is relatively high, the two groups of centrally-opened metal balls can impact and collide with each other to achieve an impact damping effect.

6. A three-way composite vibrator dynamic vibration absorber as claimed in claim 4, characterized in that: The nonlinear vibrator A, the nonlinear vibrator B and the linear vibrator C are connected together through an orthogonal V-shaped elastic bracket to form a composite vibrator, which can absorb vibration, reduce vibration and reduce noise in three mutually orthogonal directions.

7. A three-way composite vibrator dynamic vibration absorber as claimed in claim 4, characterized in that: The nonlinear oscillator B and the linear oscillator C each include two groups.

8. A three-way composite vibrator dynamic vibration absorber as claimed in claim 4, characterized in that: The mounting base to the four free ends is designed with a variable cross-section, and the minimum width of the free end is 1 / 2 of the width of the base part. It has the characteristics of geometric nonlinearity, and its bending stiffness can change with the force of the nonlinear oscillator.

9. A three-way composite vibrator dynamic vibration absorber as claimed in claim 4, characterized in that: The conical helical spring of the nonlinear oscillator A is pre-compressed to 1 / 4 of its original length; The twisted pair of metal wires of vibrator B needs to be tensioned to put them in a slightly taut state; the cylindrical helical spring of vibrator C needs to be pre-compressed to 1 / 4 of its original length.

10. A vibration absorbing method of a three-way composite vibrator dynamic vibration absorber, characterized in that: A three-way composite vibrator dynamic vibration absorber according to any one of claims 1 to 9; The nonlinear oscillator A can adapt to a wider working frequency band and still has a certain vibration absorption effect when excited by multiple frequencies; The nonlinear oscillator B has the nonlinear characteristics of cubic stiffness and can absorb vibration energy in a wide frequency range; The two groups of cylindrical helical springs are connected in series, which, on the one hand, restrict the central hole metal ball to the middle position of the twisted metal wire, and on the other hand, form a linear oscillator C with the central hole metal ball, so that it can vibrate freely on the twisted metal wire, and can be adapted to the vibration reduction object of a specific frequency through reasonable frequency design. The nonlinear vibrator A, nonlinear vibrator B and linear vibrator C are combined to form a special composite vibrator, which can achieve vibration absorption, vibration reduction and noise reduction in three mutually orthogonal directions, among which the Z direction is the main vibration reduction direction with the best vibration absorption and vibration reduction effect, and the X and Y directions are the secondary vibration reduction directions with the second best effect; When the twisted pair of metal wires are in motion, the relative slip between the two metal wires produces friction damping, which dissipates the vibration energy; when the Z-axis amplitude is too large, the two metal balls with central holes will collide with each other, forming impact damping, which can further dissipate the vibration energy.

Images