Rotary permanent magnet damping vibration absorber capable of displaying vibration magnitude

Abstract

The invention discloses a rotary permanent magnet damping vibration absorber capable of displaying vibration magnitude, which comprises a bracket, orthogonally crossed ball screws, intersection fulcrum blocks and rotary inertia damping mechanisms at the two ends of each screw, the mechanism comprises an inertia wheel, a permanent magnet rotor, a stator winding and an energy consumption assembly which is connected with a rectifier bridge, a resistor and a multi-voltage LED lamp bead parallel light-emitting device. The multi-directional vibration absorber is simple in structure and reasonable in design, multi-directional vibration is converted into inertia wheel rotation through the orthogonal lead screw, efficient broadband vibration absorption is achieved through the flywheel inertia amplification effect and the extremely small mass and size, and the problem that a traditional vibration absorber is heavy is thoroughly solved; and meanwhile, the LED lamp beads with different voltages are driven through magnetoelectric damping power generation, so that the light emitting color changes along with the vibration intensity, the vibration intensity is converted into a visual signal, real-time visualization of the state is achieved, routing inspection and maintenance are convenient, and high practical value is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibration reduction equipment, in particular to a rotary permanent magnetic damping vibration absorber capable of displaying vibration size. BACKGROUND

[0002] At present, in the process of industrial production, in view of energy saving, some large motors are often transformed by frequency conversion. For vertical motors, the horizontal support stiffness is weak, the shaft system is long, and the critical speed is generally lower than the operating speed of the motor. This causes the operating speed of the equipment to often fall within the critical speed range after the frequency conversion transformation of the vertical motor, resulting in excessive vibration of the upper part of the motor.

[0003] The existing common method for dealing with critical vibration has the following defects: 1. Reducing unbalanced excitation force through high-precision dynamic balancing can reduce critical vibration to a certain extent, but the balancing precision requirement is very high, the actual operation is difficult, and the effect is limited; 2. Using a top screw or the like to rigidly support the upper part of the motor cannot guarantee that the stiffness of each support point is consistent, and a slight deviation will cause the center of the shaft system to deviate, which not only cannot effectively reduce vibration, but also may exacerbate vibration, and in severe cases, the equipment may even be damaged; 3. Although the traditional dynamic vibration absorber can effectively absorb vibration energy, in order to achieve good vibration reduction effect, the mass of the vibration absorber usually needs to be more than 2% of the mass of the main equipment, resulting in a large volume and heavy mass of the vibration absorber, which is extremely inconvenient for on-site installation, transportation and maintenance. In summary, the existing technical means all have the problems of limited vibration reduction effect, great implementation difficulty or excessively bulky device, and a new vibration reduction scheme that is lightweight, efficient and convenient for on-site application is urgently needed. SUMMARY

[0004] The present application aims to provide a rotary permanent magnetic damping vibration absorber capable of displaying vibration size to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a rotary permanent magnetic damping vibration absorber capable of displaying vibration size, comprising a support, a ball screw is arranged on the support and crosses each other, a fulcrum block is arranged at the intersection of the ball screws, the support is fixed on the fulcrum block, and a rotary inertia damping mechanism is arranged at both ends of each ball screw; the rotary inertia damping mechanism comprises: an inertia wheel, the inertia wheel is rotationally connected with the ball screw; a permanent magnet rotor, the permanent magnet rotor is arranged on the inertia wheel; a stator winding, the stator winding is arranged around the permanent magnet rotor and forms a gap with the permanent magnet rotor; and a power dissipation assembly, the power dissipation assembly is connected with the stator winding.

[0006] Preferably, the stator winding has at least two ends, the energy consumption mechanism comprises a rectifier bridge, a resistor and a light emitting device; the AC input end of the rectifier bridge is connected with the two ends of the stator winding, and the DC output end of the rectifier bridge is connected between the positive and negative poles, and the resistor and the light emitting device are connected in series.

[0007] Preferably, the light emitting device comprises at least a first lamp bead and a second lamp bead connected in parallel, the first lamp bead and the second lamp bead have different conduction voltages and emit different colors of light.

[0008] Preferably, the first lamp bead and the second lamp bead are both LED lamp beads.

[0009] Preferably, the support comprises a plurality of support rods, one end of each of the support rods is fixedly connected to the fulcrum block.

[0010] Preferably, by adjusting the mass of the inertia wheel and the resistance of the energy consumption circuit, the main damping frequency and the damping ratio of the vibration absorber can be freely adjusted, and after the equipment is installed, the vibration situation of the equipment can be flexibly adjusted without special customization.

[0011] Compared with the prior art, the inertia damping mechanism cooperating with the ball screw arranged in quadrature can effectively absorb the vibration in each horizontal direction, the linear motion of the ball screw is converted into the rotary motion of the inertia wheel by the ball screw, the inertia amplification effect of the flywheel is utilized, the physical mass and the structural size are small, and efficient vibration absorption is realized, and the problem of the bulky traditional vibration absorber is solved.

[0012] Meanwhile, the magneto-damping and visual indication are innovatively combined, the permanent magnet rotor rotates with the inertia wheel, the current is generated in the stator winding, the electric energy is converted into heat by the resistor and dissipated, and stable damping force is provided. In addition, the special LED lamp bead is connected in series in the loop, the light emitting color changes with the vibration voltage, so that the invisible vibration intensity is converted into the intuitive light color signal, the state of the equipment is clear at a glance, and the inspection work is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a side view of the installation of the application and the motor; Figure 2 It is a top view of the installation of the application and the motor; Figure 3 It is a structure schematic view of the connection between the ball screw and the permanent magnet rotor of the application; Figure 4 It is a structure schematic view of the energy consumption assembly of the application.

[0014] In the figure: 1, support; 2, ball screw; 3, fulcrum block; 4, rotary inertia damping mechanism; 401, inertia wheel; 402, permanent magnet rotor; 403, stator winding; 404, energy consumption component; 4041, rectifier bridge; 4042, resistor; 4043, light-emitting component; 5, first lamp bead; 6, second lamp bead; 7, support rod; 8, motor. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0016] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0017] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0018] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several" is two or more, unless otherwise explicitly specified and limited.

[0019] Embodiments Please refer to Figures 1-4 As shown in the figure, the present application provides a rotary permanent magnet damping vibration absorber capable of displaying vibration size, which comprises a support 1, a ball screw 2 arranged in cross on the support 1, a fulcrum block 3 designed at the intersection of the ball screw 2, and a rotary inertia damping mechanism 4 mounted at both ends of each ball screw 2. In the embodiment, the rotary inertia damping mechanism 4 comprises: an inertia wheel 401, a permanent magnet rotor 402, a stator winding 403, and an energy consumption component 404.

[0020] The inertia wheel 401 is rotationally connected with the ball screw 2 through a ball nut pair, the permanent magnet rotor 402 is fixed on the inertia wheel 401 and rotates synchronously with the inertia wheel 401, the stator winding 403 is arranged around the permanent magnet rotor 402 and keeps an air gap with the permanent magnet rotor 402, and the energy consumption component 404 is electrically connected with the stator winding 403.

[0021] In the embodiment, the inertia wheel 401 comprises a flywheel disc part and a central pipe body part for fixing the permanent magnet rotor 402, the stator winding 403 is fixed through an outer shell, the outer shell is rotationally connected with the pipe body part through a bearing (not shown in the figure), and a counterweight is fixed on the bottom of the outer shell in the direction of gravity to prevent the outer shell from rotating under strong vibration.

[0022] The stator winding 403 leads out at least two terminals to form a closed loop.

[0023] As shown in Figure 4 The energy consumption mechanism comprises a rectifier bridge 4041, a resistor 4042, and a light emitting component 4043; the alternating current input end of the rectifier bridge 4041 is connected with the two end portions of the stator winding 403, the direct current output end of the rectifier bridge 4041 is connected between the positive and negative poles, and the resistor 4042 and the light emitting component 4043 are connected in series.

[0024] In the embodiment, the light emitting component 4043 comprises at least a first lamp bead 5 and a second lamp bead 6 which are connected in parallel, the first lamp bead 5 and the second lamp bead 6 are both LED lamp beads, the forward voltage of the first lamp bead 5 is different from that of the second lamp bead 6, the light emitting materials of the first lamp bead 5 and the second lamp bead 6 are respectively doped with gallium arsenide, gallium phosphide or silicon carbide compound, the light emitting colors in different voltage intervals are different, the induced electromotive force caused by vibration is directly converted into a light color signal, and it is convenient for the inspection personnel to quickly judge whether the vibration is excessive.

[0025] In the embodiment, the support 1 is composed of four support rods 7. One end of each support rod 7 is uniformly radiated and fixedly connected to a central support point block 3, and the other end of each support rod 7 is fixedly connected with the shell or the upper structure of the motor 8, so as to stably install the whole vibration absorber on the motor 8.

[0026] Of course, those skilled in the art can understand that the number of the support rods 7 is not limited to four, and similar structures of three, five or more support rods 7 can be used according to the actual support stiffness and installation space requirements, which can also achieve the purpose of converging the support 1 to the central support point and fixing the support 1 to the motor 8, and should be considered within the protection scope of the present application.

[0027] The working principle of the present application is as follows: When the vertical motor 8 is running at variable frequency, if the working speed falls into the critical speed range of the shaft system, horizontal multi-directional vibration will be generated at the upper part of the motor 8. The vibration is transmitted to the fulcrum block 3 through the support rod 7 of the support 1, and the fulcrum block 3 is located near the vibration node, so that the vibration energy is efficiently coupled to the two orthogonally arranged ball screws.

[0028] The ball screw generates axial translational displacement under vibration excitation, and the displacement is converted into the rotational motion of the inertia wheels 401 at both ends through the ball nut pair. The flywheel disc part of the inertia wheel 401 utilizes the rotational inertia amplification effect to generate an apparent inertia mass far exceeding its own physical mass, thereby effectively tuning and absorbing the vibration energy of the main system, and significantly reducing the vibration amplitude of the upper part of the motor 8.

[0029] At the same time, the permanent magnet rotor 402 fixed on the central pipe body of the inertia wheel 401 rotates at high speed synchronously with the inertia wheel 401, and relative motion is generated with the stator winding 403 around it, and an alternating electromotive force is induced in the stator winding 403. After the electromotive force is rectified by the rectifier bridge 4041 to direct current, it flows through the series-connected resistor 4042 to generate heat dissipation and provide stable electromagnetic damping force, further dissipating vibration energy.

[0030] The size of the induced electromotive force is proportional to the vibration speed, and the direct current voltage after rectification changes with the vibration intensity. When the voltage is low, only the first lamp bead 5 (such as green LED) with low conduction voltage is lit; when the voltage is high, the second lamp bead 6 (such as red LED) is lit. In this way, the vibration intensity is converted into an intuitive light color signal in real time, and the inspection personnel can quickly judge the vibration condition without touching the equipment, and realize the visual monitoring of the vibration absorber and the working state of the main equipment.

[0031] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A rotating permanent magnet damping vibration absorber capable of displaying vibration magnitude, characterized in that: The device includes a support frame on which ball screws are arranged in a crisscross pattern. A fulcrum block is provided at the intersection of the ball screws, and the support frame is fixed to the fulcrum block. Each ball screw has a rotational inertia damping mechanism at both ends. The rotational inertia damping mechanism includes: an inertia wheel rotatably connected to the ball screws; a permanent magnet rotor mounted on the inertia wheel; a stator winding surrounding the permanent magnet rotor and spaced apart from it; and an energy-dissipating component connected to the stator winding.

2. The rotating permanent magnet damping vibration absorber capable of displaying vibration magnitude according to claim 1, characterized in that: The stator winding has at least two ends, and the energy-consuming mechanism includes a rectifier bridge, a resistor, and a light-emitting device; the AC input terminal of the rectifier bridge is connected to the two ends of the stator winding, and the DC output terminal of the rectifier bridge is connected between the positive and negative terminals, and the resistor and the light-emitting device are connected in series in sequence.

3. The rotating permanent magnet damping vibration absorber capable of displaying vibration magnitude according to claim 2, characterized in that: The light-emitting device includes at least a first LED and a second LED connected in parallel, the first LED and the second LED having different on-state voltages and emitting light of different colors.

4. The rotating permanent magnet damping vibration absorber capable of displaying vibration magnitude according to claim 3, characterized in that: Both the first and second LED beads are LED beads.

5. The rotating permanent magnet damping vibration absorber capable of displaying vibration magnitude according to claim 1, characterized in that: The bracket includes multiple support rods, one end of each support rod converging and fixed to the fulcrum block.

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