阅读说明：本技术 一种具有降噪装置的雾炮机及降噪方法 (Fog gun machine with noise reduction device and noise reduction method ) 是由 李戎 白帅 吕福强 杨萌 李文杰 梁斌 于 2021-08-17 设计创作，主要内容包括：一种具有降噪装置的雾炮机及降噪方法,所述雾炮机包括雾炮机箱体、设置在雾炮机箱体内底部的高压水泵、设置在雾炮机箱体外部上端的风筒和设在风筒内的电机,降噪装置包括多个隔振器、多个板带、橡胶层和噪音检测模块,多个隔振器均布在高压水泵底部,所述隔振器下端与雾炮机箱体内底部连接；所述板带呈圆环形,等间距环绕于风筒外壁上；橡胶层设置在电机的端盖内壁上；噪音检测模块设置在雾炮机箱体外部上端,用于检测噪音分贝。本发明操作方法简单,适用范围广泛,且不需施加螺钉构件,降噪效果好。(A fog gun machine with a noise reduction device and a noise reduction method are provided, wherein the fog gun machine comprises a fog gun machine box body, a high-pressure water pump arranged at the bottom in the fog gun machine box body, an air duct arranged at the upper end outside the fog gun machine box body and a motor arranged in the air duct, the noise reduction device comprises a plurality of vibration isolators, a plurality of plate strips, a rubber layer and a noise detection module, the plurality of vibration isolators are uniformly distributed at the bottom of the high-pressure water pump, and the lower ends of the vibration isolators are connected with the bottom in the fog gun machine box body; the plate belt is in a ring shape and surrounds the outer wall of the air duct at equal intervals; the rubber layer is arranged on the inner wall of the end cover of the motor; the noise detection module is arranged at the upper end outside the fog gun case body and used for detecting noise decibels. The method has the advantages of simple operation method, wide application range, no need of screw components and good noise reduction effect.)

1. The utility model provides a fog gun machine with device of making an uproar falls, includes fog gun machine box (3), sets up high pressure water pump (6) of bottom in fog gun machine box (3), sets up dryer (1) in fog gun machine box (3) outside upper end and establishes motor (9) in dryer (1), and its characterized in that falls the device of making an uproar and includes:

the vibration isolators (5) are uniformly distributed at the bottom of the high-pressure water pump (6), and the lower ends of the vibration isolators (5) are connected with the bottom in the fog gun box body (3); the air duct structure comprises a plurality of strip belts (8), wherein the strip belts (8) are annular and surround the outer wall of the air duct (1) at intervals;

the rubber layer is arranged on the inner wall of an end cover (13) of the motor (10);

the noise detection module is arranged at the upper end of the outer part of the fog gun case body (3) and used for detecting noise decibels.

2. The fog gun machine with the noise reduction device according to claim 1, characterized in that: the plate belt (8) is made of ultrahigh molecular weight polyethylene and rubber gradient composite materials.

3. The fog gun machine with the noise reduction device according to claim 2, characterized in that: the ultrahigh molecular weight polyethylene and rubber gradient composite material is gradually converted into rubber from ultrahigh molecular weight polyethylene, the rubber side of the plate belt (8) is attached to the outer wall of the air duct (1), and the ultrahigh molecular weight polyethylene side of the plate belt (8) faces outwards.

4. The fog gun machine with the noise reduction device according to claim 1, characterized in that: the plate belt (8) is made of rubber, stainless steel or plastics.

5. The fog gun machine with the noise reduction device according to claim 1, characterized in that: the number of the vibration isolators (5) is at least four, and the vibration isolators (5) are rubber vibration isolators.

6. The fog gun machine with the noise reduction device according to claim 1, characterized in that: the noise detection module is a decibel meter (2).

7. The fog gun machine with the noise reduction device according to claim 1, characterized in that: the bottom of the motor (10) is provided with a horizontal plate (11), and two ends of the horizontal plate (11) are respectively fixedly connected with the inner wall of the air duct (1).

8. A noise reduction method for the fog gun machine with the noise reduction device according to any one of claims 1 to 7, comprising the steps of:

the method comprises the following steps: under the condition that the fog gun machine works, the rubber layer performs sound absorption and vibration reduction treatment on the motor (10), the vibration isolator performs primary noise reduction on the high-pressure water pump (6), and the noise detection module detects the noise decibel Z1 at the moment;

step two: according to the power frequency f of the motor (10)₁Wherein according to the distance f₁. + -. 10% and 2f₁Selecting the frequency f avoiding the resonance with the motor (10) according to the principle of +/-10%, wherein f is a natural number larger than 0;

step three: substituting the f selected in the step two into a formula (1) to calculate the number N of the plate strips (8), wherein the formula (1) is as follows:

C₁₁C₂₂C₃₃+C₁₂C₂₃C₃₁+C₁₃C₂₁C₃₂-C₁₁C₂₃C₃₂-C₁₂C₂₁C₃₃-C₁₃C₂₂C₃₁＝0 (1)

wherein, in the formula (1),

A₂is the cross-sectional area of the strip (8), I₂And J₂Respectively relating to the middle surface section inertia moment of the air duct (1) and the cross section torsion constant of the plate belt (8), wherein (m, n) is the fundamental frequency mode of the air duct (1), E is the elastic modulus of the air duct (1), G is the shear modulus of the air duct (1), v represents the Poisson's ratio of the air duct (1), L is the length of the air duct (1), R is the difference between the radius of the air duct (1) and the wall thickness of one half of the air duct (1), h is the wall thickness of the air duct (1), and h is the wall thickness of the air duct (1)_rThickness of the strip (8), h_r＝2b_r＝0.01m，b_rThe width of the plate belt (8) is defined, and rho is the density of the air duct (1);

step four: arranging the plates with the number of N on the outer wall of the air duct (1) at intervals according to the number N of the plate strips (8) obtained in the step three, and detecting the noise decibel Z2 at the moment through a noise detection module;

step five: and judging whether the difference value between the noise signal Z2 in the fourth step and the noise signal Z1 in the step 1 is larger than a set threshold value, if not, repeating the second step, the third step and the fourth step until the difference value is larger than the set threshold value.

9. A method of noise reduction according to claim 8, characterized by: in the fourth step, the N plate strips (8) are uniformly arranged on the outer wall of the air duct (1) from the middle part of the air duct (1) to two sides at intervals.

Technical Field

The invention relates to the technical field of noise reduction of fog gun machines, in particular to a fog gun machine with a noise reduction device and a noise reduction method.

Background

The construction site of the building engineering generally has the characteristics of high dust concentration, more waste articles, high resource consumption and the like, and is easy to cause certain pollution such as noise, dust and the like to the surrounding environment. The existing dust settling equipment atomizes water into micron-sized water mist through high pressure, can effectively decompose pollution particles and dust in the air, and has the advantages of low water consumption, good dust suppression effect, strong equipment maneuverability, convenience in transfer and high utilization rate in a construction site. However, the noise generated during the operation of the equipment is large in decibel, and secondary environmental pollution is easily generated during the use. The decibel of noise generated when a fog gun machine or a fog gun vehicle runs is related to the resonance of the mechanical part, and the noise is always increased along with the continuous running of the mechanical part. Particularly, when the fog gun machine runs at night, the generated noise often causes complaints of residents nearby a construction site and causes certain interference to project constructors.

The existing noise reduction method of the dust settling equipment mainly centers on the aspects of adding noise reduction equipment, sound insulation materials, changing the trend of wind flow inside the structure and the like in the structure, the noise reduction effect mostly depends on the experience of design and engineering personnel, targeted adjustment is difficult to realize when the effect is unsatisfactory, noise reduction related data are invisible, a noise reduction device often involves the problems of punching, using screws and the like, and the dust settling effect of the equipment can be influenced by changes of the trend of the wind flow and the like.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the fog gun machine with the noise reduction device and the noise reduction method, the operation method is simple, the application range is wide, no screw component is required to be applied, and the noise reduction effect is good.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a fog gun machine with device of making an uproar falls, includes fog gun machine box, sets up the high pressure water pump of bottom in fog gun machine box, sets up at the outside dryer of upper end of fog gun machine box and establishes the motor in the dryer, and the device of making an uproar falls includes:

the vibration isolators are uniformly distributed at the bottom of the high-pressure water pump, and the lower ends of the vibration isolators are connected with the bottom in the fog gun case body; the plate strips are annular and surround the outer wall of the air duct at intervals;

the rubber layer is arranged on the inner wall of the end cover of the motor;

the noise detection module is arranged at the upper end outside the fog gun case body and used for detecting noise decibels.

The beneficial effects are that: according to the invention, noise reduction is effectively carried out on the fog gun machine under the dual actions of the vibration isolator and the plate strip, the quantity and the effect of the plate strip are visualized, and the noise reduction device does not relate to rivets and punching, so that structural damage caused by holes, gaps and the like in the running process of the fog gun machine is effectively avoided, the service life of the fog gun machine is prolonged, and the dust fall effect of the fog gun machine is ensured.

Further, the plate belt is made of ultrahigh molecular weight polyethylene and rubber gradient composite materials.

Further, the ultrahigh molecular weight polyethylene and rubber gradient composite material is gradually converted into rubber from ultrahigh molecular weight polyethylene, the rubber side of the plate belt is attached to the outer wall of the air duct, and the ultrahigh molecular weight polyethylene side of the plate belt faces outwards.

The beneficial effects are that: the constraint of the plate strip can avoid resonance and achieve the noise reduction effect, the plate strip is made of ultrahigh molecular weight polyethylene and rubber gradient composite materials, the rubber side of the plate strip is placed in contact with the outer wall of the air duct, and the good ductility of the plate strip is utilized to facilitate later-stage application and adjustment, so that the fitting degree is ensured; the ultra-high molecular weight polyethylene side of the plate strip is placed on the outer side, and the ultra-high molecular weight polyethylene side is good in sound absorption, corrosion resistance and impact resistance, so that the noise reduction effect is enhanced, and meanwhile, the ultra-high molecular weight polyethylene side can be better adapted to sand dust and high humidity environment of a construction site.

Further, the plate belt is made of rubber, stainless steel or plastics.

Further, the number of the vibration isolators is at least four, and the vibration isolators are rubber vibration isolators.

Further, the noise detection module is a decibel meter. The beneficial effects are that: the decibel appearance can the short-term test out the size of noise to can obtain the result of making an uproar of falling fast, make the visual of making an uproar of falling, make the workman clearly know the effect of making an uproar of falling.

Further, the bottom of motor is equipped with the horizontal plate, the horizontal plate both ends respectively with dryer inner wall fixed connection. The beneficial effects are that: the horizontal plate plays a role in supporting and stabilizing the motor, and stable operation of the motor is ensured.

Further, a noise reduction method is used for the fog gun machine with the noise reduction device, and the noise reduction method comprises the following steps:

the method comprises the following steps: under the condition that the fog gun machine works, the rubber layer performs sound absorption and vibration reduction treatment on the motor, the vibration isolator performs primary noise reduction on the high-pressure water pump, and the noise detection module detects the noise decibel Z1 at the moment;

step two: according to the motor supply frequency f₁Wherein according to the distance f₁. + -. 10% and 2f₁Selecting a frequency f avoiding resonance with the motor according to the principle of +/-10%, wherein f is a natural number larger than 0;

step three: substituting the f selected in the step four into a formula to calculate the number N of the plate strips, wherein the formula (1) is as follows:

C₁₁C₂₂C₃₃+C₁₂C₂₃C₃₁+C₁₃C₂₁C₃₂-C₁₁C₂₃C₃₂-C₁₂C₂₁C₃₃-C₁₃C₂₂C₃₁＝0 (1)

wherein, in the formula (1),

A₂is the area of the cross section of the strip, I₂And J₂Respectively, the plate belt is about the middle surface section inertia moment of the air duct and the torsion constant of the plate belt cross section, wherein (m, n) is the fundamental frequency mode of the air duct, E is the elastic modulus of the air duct, G is the shear modulus of the air duct, ν represents the Poisson's ratio of the air duct, L is the length of the air duct, R is the difference between the radius of the air duct and the wall thickness of one half of the air duct, h is the wall thickness of the air duct, and h is the torsion constant of the plate belt cross section_rThickness of the strip, h_r＝2b_r＝0.01m， b_rThe width of the plate belt is defined, and rho is the density of the air duct;

step four: according to the number N of the plate strips obtained in the third step, the plate strips with the number N are arranged on the outer wall of the air duct at intervals, and the noise decibel Z2 at the moment is detected through a noise detection module;

step five: and judging whether the difference value between the noise signal Z2 in the fourth step and the noise signal Z1 in the step 1 is larger than a set threshold value, if not, repeating the second step, the third step and the fourth step until the difference value is larger than the set threshold value. The beneficial effects are that: the plate strip applying process of the invention does not need to punch, thereby ensuring the structural strength of the fog gun machine, prolonging the service life of the fog gun machine, matching the number of the plate strips according to the types of the motor and the air duct of different fog gun machines, achieving good noise reduction effect, being suitable for the size change of the cylinder body, and having wide application range.

Furthermore, the N plate strips in the fourth step are uniformly arranged on the outer wall of the air duct from the middle part of the air duct to two sides at intervals.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a blower motor according to an embodiment of the present invention;

fig. 3 is a schematic position diagram of a wind barrel motor according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a blower motor according to an embodiment of the present invention;

fig. 5 is a schematic structural view of the vibration isolator according to the embodiment of the invention.

Reference numerals: 1. the device comprises an air duct, 2, a decibel meter, 3, a fog gun case, 4, a water tank, 5, a vibration isolator, 6, a high-pressure water pump, 7, an engineering measurement programmable calculator, 8, a plate belt, 9, a fan, 10, a motor, 11, a horizontal plate, 12, a supporting rod, 13, an end cover, 14, a motor rotor, 15, a rubber layer, 16 and a motor stator.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

It is noted that relational terms such as "first" and "second," and the like, may 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. Also, the terms "comprises," "comprising," or any other variation 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

Referring to fig. 1-5, a fog gun with a noise reduction device comprises a fog gun box body 3, a high pressure water pump 6 arranged at the bottom in the fog gun box body 3, an air duct 1 arranged at the upper end outside the fog gun box body 3, and a motor 10 arranged in the air duct 1, wherein the noise reduction device comprises: the device comprises a plurality of vibration isolators 5, a plurality of plate strips 8, a rubber layer and a noise detection module, wherein the vibration isolators 5 are uniformly distributed at the bottom of a high-pressure water pump 6, and the lower ends of the vibration isolators 5 are connected with the bottom in a fog gun box body 3; the plate strips 8 are circular, and a plurality of plate strips 8 surround the outer wall of the air duct 1 at equal intervals; the rubber layer is arranged on the inner wall of an end cover 13 of the motor 10; the noise detection module is arranged at the upper end of the outer part of the fog gun case body 3 and used for detecting noise decibels. The invention does not relate to rivets and punching, and effectively avoids the structural damage caused by holes, gaps and the like in the running process of the fog gun machine.

Wherein, fog gun machine still includes water tank 4, carousel and high-pressure raceway, and 6 one ends of high-pressure raceway are passed through high-pressure raceway and are linked together with dryer 1, and the other end and water tank 4 intercommunication, fan 9 and motor 10's output shaft fixed connection, and motor 10 includes motor rotor 14 and motor stator 16, and both ends are equipped with the end cover respectively about motor 10, because fog gun machine and motor 10 are prior art, and this application does not do too much detailed explanation here, need to explain that, and the part that does not describe in detail in this application is prior art.

Specifically, the plate strip 8 is made of a composite material of ultrahigh molecular weight polyethylene and rubber gradient, the composite material of ultrahigh molecular weight polyethylene and rubber gradient is gradually changed from ultrahigh molecular weight polyethylene to rubber, the rubber side of the plate strip 8 is attached to the outer wall of the air duct 1, and the ultrahigh molecular weight polyethylene side of the plate strip 8 faces outwards. The restraint of the plate strip 8 can avoid resonance and achieve the noise reduction effect, the rubber side of the plate strip 8 is placed in contact with the outer wall of the air duct 1, and the good ductility of the rubber side is utilized, so that later-stage application and adjustment are facilitated, and the fitting degree is ensured; the ultra-high molecular weight polyethylene side of the plate strip 8 is placed on the outer side, and the good sound absorption, corrosion resistance and impact resistance of the ultra-high molecular weight polyethylene side are utilized, so that the noise reduction effect is enhanced, and meanwhile, the ultra-high molecular weight polyethylene side can better adapt to sand dust and high humidity environment of a construction site.

Specifically, the noise detection module is decibel appearance 2, and decibel appearance 2 can detect out the size of noise fast, makes to fall and makes and falls the visualization for the workman clearly knows the effect of making an uproar.

Of course, the present invention is not limited to the above-described embodiments, and several other embodiments based on the design concept of the present invention are provided below.

For example, in other embodiments, unlike the embodiments described above, the strip 8 is made of rubber, stainless steel, or plastic.

For example, in other embodiments, different from the above-described embodiments, the number of the vibration isolators 5 is at least four, the vibration isolators 5 are rubber vibration isolators, the upper ends of the vibration isolators 5 are detachably and fixedly connected with the motor 10, and the lower ends of the vibration isolators 5 are detachably and fixedly connected with the bottom inside the fog gun case 3.

For example, in other embodiments, different from the above-described embodiments, the plate strip 8 is made of a polyurethane/rubber gradient composite material, which is gradually changed from polyurethane to rubber, wherein the rubber side of the plate strip 8 is placed in contact with the air duct 1, and the polyurethane side is placed on the outside, so that the noise reduction effect is enhanced, and meanwhile, the plate strip can better adapt to sand dust and high humidity environment of a construction site by virtue of good sound absorption, corrosion resistance and impact resistance.

The gradient composite material adopted by the invention avoids the problem of interface existing between common composite materials, has better durability, and is a heterogeneous material which adopts an advanced material composite technology and is in continuous gradient change from one side to the other side by controlling the elements (composition, structure and the like) of the constituent materials.

For example, in other embodiments, different from the above-described embodiments, the bottom of the motor 10 is provided with the horizontal plate 11, two ends of the horizontal plate 11 are respectively fixedly connected with the inner wall of the air duct 1, the center of the bottom of the horizontal plate 11 is provided with two support rods 12 which are inclined outwards, the two support rods 12 and the inner wall of the air duct 1 enclose a fan shape, the horizontal plate 11 plays a role in supporting and stabilizing the motor 10, so as to ensure stable operation of the motor, and the support rods 12 support and stabilize the horizontal plate 11.

For example, in other embodiments, unlike the above-described embodiments, a plurality of strips 8 are provided, and the strips 8 are circular and spaced around the outer wall of the air duct 1.

A noise reduction method for a fog gun machine with a noise reduction device comprises the following steps:

the method comprises the following steps: under the condition that the fog gun machine works, the rubber layer performs sound absorption and vibration reduction treatment on the motor 10, the vibration isolator performs primary noise reduction on the high-pressure water pump 6, and the noise detection module detects the noise decibel Z1 at the moment;

step two: according to the frequency f of the power supply of the motor 10₁Wherein according to the distance f₁. + -. 10% and 2f₁Selecting a frequency f avoiding resonance with the motor 10 according to the principle of +/-10%, wherein f is a natural number larger than 0;

step three: substituting the f selected in the step two into a formula (1) to calculate the number N of the plate strips 8, wherein the formula (1) is as follows:

C₁₁C₂₂C₃₃+C₁₂C₂₃C₃₁+C₁₃C₂₁C₃₂-C₁₁C₂₃C₃₂-C₁₂C₂₁C₃₃-C₁₃C₂₂C₃₁＝0 (1)

wherein, in the formula (3),

A₂the cross-sectional area of the strip 8, I₂And J₂Respectively, the plate belt 8 is about the inertia moment of the middle surface section of the air duct 1 and the torsion constant of the cross section of the plate belt 8, wherein (m, n) is the fundamental frequency mode of the air duct 1, E is the elastic modulus of the air duct 1, G is the shear modulus of the air duct 1, v represents the Poisson's ratio of the air duct 1, L is the length of the air duct 1, R is the difference between the radius of the air duct 1 and the wall thickness of one half of the air duct 1, h is the wall thickness of the air duct 1, and h is the cross section torsion constant of the plate belt 8_rThickness of strip 8, h_r＝2b_r＝0.01m，b_rThe width of the plate strip 8 is defined, and rho is the density of the air duct 1;

step four: uniformly arranging the N plate strips 8 on the outer wall of the air duct 1 at intervals according to the N plate strips 8 obtained in the third step, wherein the N plate strips 8 are arranged on the outer wall of the air duct 1 at intervals from the middle part of the air duct 1 to two sides in the third step, and detecting the noise decibel Z2 through a noise detection module;

step five: and (4) judging whether the difference value between the noise signal Z2 in the fourth step and the noise signal Z1 in the step 1 is larger than a set threshold value, if not, repeating the fourth step, the fifth step and the sixth step until the difference value is larger than the set threshold value. The plate belt 8 of the invention does not need to be punched in the air duct 1 when being installed, the structural strength of the air duct 1 of the fog gun machine is ensured, the service life of the fog gun machine is prolonged, the number of the matched plate belt 8 can be calculated according to the types of the motor 10 and the air duct 1 of different fog gun machines, and thus, good noise reduction effect can be achieved, therefore, the invention is suitable for different types of fog gun machines, the application range is wide, and the invention is also suitable for the fog gun vehicle with the motor 10 and the air duct 1.

For example, in other embodiments, unlike the above-described embodiments, a plurality of strips 8 are provided, and the strips 8 are circular and evenly spaced around the outer wall of the air duct 1.

For another example, in another embodiment, different from the above-described embodiment, a plurality of strips 8 are arranged, the strips 8 are circular rings, and the strips 8 are spaced around the outer wall of the air duct 1, and when the number of the strips 8 is greater than 3, the strips 8 are arranged on the outer wall of the air duct 1 in a manner that the middle part is encrypted and the two sides are loose.

Specifically, the air duct 1 is a cylindrical shell, the calculation can be completed quickly by introducing the formula into an engineering measurement programmable calculator 7 and inputting data required by calculation, and the engineering measurement programmable calculator 7 is arranged at the upper end outside the fog gun case 3.

From the above noise reduction method, the test results of table 1 were obtained, where, in calculating the values in table 1, h is 0.002m, E is 210GPa, ν is 0.3, ρ is 7850kg/m3, h is 7850kg/m3_r＝2b_r＝0.01m。

TABLE 1 test results obtained according to the above noise reduction method

In addition, where (m, n) is the fundamental frequency mode of the wind tunnel 1, the selection of the values of m and n is well known to those skilled in the art, and this is not discussed in detail herein for the prior art, the number of strips 8 and the noise reduction effect can be rapidly obtained by the above method, so that the number and effect of the strips 8 can be visualized.

The specific working principle of the invention is as follows: the vibration isolators 5 are arranged at the bottom of the high-pressure water pump 6, then the number of plate bottoms 8 required to be applied is calculated according to the calculation step, the plate strips 8 are uniformly arranged on the outer wall of the air duct 1 from the middle of the air duct 1 to two sides at intervals, specifically, when the number of the plate strips 8 is larger than 3, the plate strips 8 are encrypted according to the middle, the two sides are arranged on the outer wall of the air duct 1 in a loose mode, the plate strips 8 are arranged on the air duct 1 according to the mode, and the noise reduction effect is improved by 35 percent.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.