Method and device for reducing noise of mechanical equipment

Abstract

The present invention provides a method and device for reducing the noise of mechanical equipment, including selecting an appropriate equipment casing according to the vibration frequency range of the mechanical equipment when the mechanical equipment is working, decomposing each component of the mechanical equipment according to the frequency generated by the vibration and defining the range of the vibration, determining the overall axial vibration frequency and energy of the mechanical equipment, determining the axial damping material, determining the radial damping material of each part according to the vibration frequency and range of each component of the mechanical equipment, installing the equipment casing on the outside of the mechanical equipment, determining the shape and size of the axial damping material and the radial damping material according to the installation position, and installing the damping material. The present invention blocks the transmission of sound waves through the equipment casing, and the damping material absorbs the axial and radial vibration energy. By utilizing vibration, acoustics, and material technology, the noise reduction is scientifically achieved, with significant effect, low cost, and simple application.

Description

Technical Field

[0001] The present invention relates to the technical field of noise control, and in particular to a method and device for reducing noise of mechanical equipment. Background Art

[0002] When any mechanical equipment is working, it is realized in the form of relative mechanical motion within a limited range, either rotational motion, linear motion, or compound motion. These motions generally need to produce a certain amplitude in a limited space to complete a certain work. In this process, heat and noise problems will be generated. If effective noise reduction measures are not taken during installation, the noise generated by these devices will cause environmental pollution that is unbearable for the assignee and will seriously interfere with people's normal life, study and work environment.

[0003] Publication number CN111519778A provides a noise control device for a filling production workshop. It uses a soundproof enclosure to isolate the strong noise source on the filling production line from other areas, and uses soundproof walls to isolate different production lines. This method is similar to the current solution for dealing with noise generated by harmful mechanical vibration. Basically, it uses various physical methods to isolate the outside world. Simply building isolation walls is not only expensive and bulky, but also has poor effects and does not solve the problem at the root of the noise. Summary of the Invention

[0004] The object of the present invention is to provide a method and device for reducing noise of mechanical equipment to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for reducing noise of mechanical equipment comprises the following steps:

[0007] S1: Select an appropriate device housing according to the vibration frequency range of the mechanical equipment during operation, and make the natural frequency of the device housing avoid the vibration frequency range of the mechanical equipment during operation;

[0008] S2: Decompose each component of the mechanical equipment according to the frequency of vibration and define the range of vibration;

[0009] S3: Determine the vibration frequency and energy of the entire axial direction of the mechanical equipment and determine the axial damping material;

[0010] S4: Determine the radial damping material of each component according to the vibration frequency and range of each component of the mechanical equipment;

[0011] S5: Install the device housing outside the mechanical equipment, and determine the shape and size of the axial damping material and the radial damping material according to the installation position;

[0012] S6: Install the axial damping material at the contact point between the bottom of the mechanical equipment and the equipment casing, and install the radial damping materials of each part at the connection points around each component of the mechanical equipment and the inner wall of the equipment casing.

[0013] Preferably, the device housing is made of a closed layer of metal material with a certain weight and rigidity, which is used to block the transmission of sound waves of noise generated by mechanical equipment installed inside.

[0014] Preferably, a wire threading hole for passing the power cord is opened on the side of the device housing.

[0015] Preferably, a layer of sound-absorbing material is attached to the inner wall of the device housing to attenuate sound energy and achieve the effect of reducing noise.

[0016] Preferably, one end of the axial damping material and the radial damping material are fixed to the inner wall of the equipment housing, and the other end is against the mechanical equipment.

[0017] Preferably, the damping material is a combination of one or more of a viscoelastic damping material, a high damping alloy, a damping composite material and an intelligent damping material.

[0018] The present invention further provides a device for reducing the noise of mechanical equipment, comprising an equipment housing, an axial damping module and a radial damping module. The equipment housing is provided with a threading hole for threading wires. The axial damping module is fixed to the bottom side of the equipment housing and is used to support the mechanical equipment installed inside the equipment housing at the bottom of the equipment housing. The radial damping module is fixed to the inner side wall of the equipment housing and is used to support the mechanical equipment installed inside the equipment housing at the side wall of the equipment housing.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention blocks the transmission of sound waves through the equipment casing, absorbs axial vibration energy through axial damping material, and absorbs radial vibration energy through radial damping material. In addition, the damping material can also reduce the vibration amplitude of the mechanical equipment, thereby suppressing the generation of noise at the source. The present invention utilizes vibration, acoustics, and material technology to scientifically achieve noise reduction, with significant effects, low cost, and easy application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the process of the present invention;

[0022] Figure 2 It is a cross-sectional schematic diagram of the application state of the device of the present invention.

[0023] In the figure: 1 device housing, 11 threading hole, 2 axial damping material, 3 radial damping material, 4 mechanical equipment. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example:

[0026] See also Figure 1 , the present invention provides a technical solution:

[0027] A method for reducing noise of mechanical equipment comprises the following steps:

[0028] S1: Select an appropriate device housing 1 according to the vibration frequency range of the mechanical device 4 when it is working, and make the natural frequency of the device housing 1 avoid the vibration frequency range of the mechanical device 4 when it is working.

[0029] The shape and size of the device housing 1 are selected according to the appearance of the mechanical device 4, and since the natural frequency of the device housing 1 avoids the overall vibration frequency range of the mechanical device 4 when it is working, the occurrence of resonance can be effectively avoided.

[0030] In addition, the device housing 1 is made of a closed layer of metal material with a certain weight and rigidity, which is used to block the transmission of sound waves of noise generated by the mechanical equipment 4 installed inside. A wire threading hole 11 for passing the power cord is opened on the side of the device housing 1 to facilitate threading. A layer of sound-absorbing material is attached to the inner wall of the device housing 1 to attenuate sound energy and achieve the effect of reducing noise.

[0031] S2: Decompose the components of the mechanical device 4 according to the frequency of vibration and define the range of the vibration.

[0032] Among them, since the structures of various parts of the mechanical equipment 4 are different, the frequency and amplitude range of vibration generated by each individual part are different, so they are decomposed and defined one by one to facilitate the subsequent selection of different radial damping materials 3 for damping and shock absorption.

[0033] S3: Determine the overall axial vibration frequency and energy of the mechanical equipment 4, and determine the axial damping material 2.

[0034] The axial damping material 2 is mainly used for damping and buffering in the axial direction of the mechanical device 4 and for shock absorption, thereby achieving the effect of reducing the axial vibration amplitude of the mechanical device 4 and reducing the noise generated in the axial direction.

[0035] S4: Determine the radial damping material 3 of each component according to the vibration frequency and range of each component of the mechanical equipment 4.

[0036] Among them, the radial damping material 3 selected for use in various parts of the mechanical equipment 4 is mainly aimed at the radial vibration of each component, thereby damping and buffering the radial vibration of each component of the mechanical equipment 4, and performing shock absorption, so as to achieve the effect of reducing the overall radial vibration amplitude of the mechanical equipment 4 and reducing the noise generated in the radial direction.

[0037] S5: Install the device housing 1 outside the mechanical device 4, and determine the shape and size of the axial damping material 2 and the radial damping material 3 according to the installation position.

[0038] The shape and size of the axial damping material 2 are mainly determined according to the bottom size and shape of the mechanical device 4, the installation position and the overall axial vibration frequency and energy of the mechanical device 4, so as to ensure that the axial damping material 2 can not only play a good supporting role for the mechanical device 4 in the axial direction, but also play a good buffering effect in the axial direction.

[0039] The shape and size of the radial damping material 3 are mainly determined according to the distance between each part of the mechanical equipment 4 and the inner side wall of the equipment housing 1 and the vibration frequency and range of each component, so as to provide good support for the mechanical equipment 4 through the side wall in the radial direction and have a good buffering effect in the radial direction.

[0040] S6: Install the axial damping material 2 at the contact point between the bottom of the mechanical device 4 and the device housing 1, and install the radial damping materials of each part at the connection points around each component of the mechanical device 4 and the inner wall of the device housing 1.

[0041] Among them, one end of the axial damping material 2 and the radial damping material 3 are fixed on the inner wall of the equipment housing 1, and the other end is against the mechanical equipment 4. In addition, the damping material is a combination of one or more viscoelastic damping materials, high damping alloys, damping composite materials and intelligent damping materials.

[0042] See also Figure 2The present invention also provides a device for reducing the noise of mechanical equipment, including an equipment housing 1, an axial damping module and a radial damping module. The equipment housing 1 is provided with a threading hole 11 for threading, which is convenient for threading. The axial damping module is fixed to the bottom side of the equipment housing 1 and is used to support the mechanical equipment 4 installed inside the equipment housing 1 at the bottom. The radial damping module is fixed to the inner wall of the equipment housing 1 and is used to support the mechanical equipment 4 installed inside the equipment housing 1 at the side wall. In addition, a layer of sound-absorbing material is attached to the inner wall of the equipment housing 1 to attenuate sound energy and achieve the effect of reducing noise.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for reducing noise of mechanical equipment, characterized in that: The specific steps include: S1: Select an appropriate device housing according to the vibration frequency range of the mechanical equipment during operation, and make the natural frequency of the device housing avoid the vibration frequency range of the mechanical equipment during operation; S2: Decompose each component of the mechanical equipment according to the frequency of vibration and define the range of vibration; S3: Determine the vibration frequency and energy of the entire axial direction of the mechanical equipment and determine the axial damping material; S4: Determine radial damping materials for each component of the mechanical equipment based on the vibration frequency and range of each component, wherein one end of the axial damping material and the radial damping material are fixed to the inner wall of the equipment housing and the other end is against the mechanical equipment; S5: Installing the device housing outside the mechanical device, and determining the shape and size of the axial damping material and the radial damping material according to the installation position, wherein the damping material is a combination of one or more of a viscoelastic damping material, a high damping alloy, a damping composite material, and an intelligent damping material; S6: Install the axial damping material at the contact point between the bottom of the mechanical equipment and the equipment casing, and install the radial damping materials of each part at the connection points around each component of the mechanical equipment and the inner wall of the equipment casing.

2. The method for reducing mechanical equipment noise according to claim 1, characterized in that: The device housing is made of a closed layer of metal material with a certain weight and rigidity, and is used to block the transmission of sound waves of noise generated by mechanical equipment installed inside.

3. The method for reducing mechanical equipment noise according to claim 2, characterized in that: A threading hole for passing the power cord is provided on the side of the device shell.

4. The method for reducing mechanical equipment noise according to claim 2, characterized in that: A layer of sound-absorbing material is attached to the inner wall of the device housing to attenuate sound energy and achieve the effect of reducing noise.

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