CN211082326U - Local mining axial-flow fan of intubate formula casing installs additional - Google Patents
Local mining axial-flow fan of intubate formula casing installs additional Download PDFInfo
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- CN211082326U CN211082326U CN201921495862.0U CN201921495862U CN211082326U CN 211082326 U CN211082326 U CN 211082326U CN 201921495862 U CN201921495862 U CN 201921495862U CN 211082326 U CN211082326 U CN 211082326U
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Abstract
The utility model relates to a mining local axial-flow fan is energy-conserving to fall the technical field of making an uproar, especially relates to install mining local axial-flow fan of intubate formula casing additional, a serial communication port, including intubate formula casing, collection wind ware, I level organism, I level impeller, II level organisms, flame-proof type three-phase asynchronous motor, noise elimination diffusion awl. The utility model provides a pair of install local mining axial-flow fan of intubate formula casing additional installs the intubate formula casing on II grades of organisms of ventilation blower, and the intubate formula casing mainly comprises first branch pipe, the other branch pipe of second and expansion pipe, and simple process, the juice is established in the integration of being convenient for, but the scale production. Meanwhile, on the premise of ensuring the ventilation performance of the ventilator, the turbulent flow state near the shell is improved, the pneumatic noise of the ventilator is reduced, the flow loss of the ventilator is reduced, the efficiency of the ventilator is improved, and the service life of the ventilator is prolonged.
Description
Technical Field
The utility model relates to an energy-conserving technical field who makes an uproar that falls of local mining axial-flow fan especially relates to a install partial mining axial-flow fan of intubate formula casing additional.
Background
In order to reduce the aerodynamic noise of axial fans, continuous efforts are made in all countries of the world, and with the technological progress and the improvement of the level of mechanical manufacture, the mechanical noise and the electromagnetic noise are gradually reduced, but the aerodynamic noise is not improved obviously. People reduce the noise of the ventilator by different technical means, and the noise reduction of the ventilator is made by changing the shape of the blades in the ventilator and the installation angle of the blades from the most basic mode of installing the sound-proof cover.
The manufacturing principle of the sound-proof cover is simple, the sound-proof cover is widely applied to mechanical noise reduction, but the damping material has certain limitation and is also influenced by temperature and humidity. The aerodynamic characteristics of the axial-flow type ventilator are changed by optimizing the structural parameters of the blades and designing new blades so as to reduce the aerodynamic noise of the axial-flow type ventilator, but the structural parameters of the blades and the design of the new blades change the structural dynamic characteristics of the axial-flow type ventilator, so that the problem becomes complex, the influence factors are increased, and the research difficulty is increased.
The utility model provides an inner intubation type casing that installs additional at II grades of organisms of local mining axial-flow fan mainly comprises first side branch pipe, the other branch pipe of second and expansion pipe, and the design principle is simple, and is little to the influence of ventilation blower structure dynamic characteristic. The utility model discloses mainly reduce aerodynamic noise through installing the interior bushing type casing additional, the fluid flows in the expansion pipe through first side branch pipe, takes place the resonance effect in the resonant cavity to the outside propagation of the energy reduction noise of consumption noise, this kind of interior bushing type casing is used and is fallen the exploration accumulation experiment and the design experience of the route of making an uproar for local mining axial-flow fan on the problem of making an uproar falls in the ventilation blower.
SUMMERY OF THE UTILITY MODEL
The utility model discloses at the internal intubation type casing of installing additional of II grades of organisms of local mining axial-flow fan, compromise the ventilation blower performance and energy-conservation fall and improve the design to the equipment of making an uproar that falls of ventilation blower under the prerequisite of the cost of controlling as far as possible, reduce the aerodynamic noise of ventilation blower, improve the noise at the noise problem of ventilation blower with the energy of resonant form noise reduction in the resonance intracavity.
the utility model provides an add intubate formula casing that installs additional at II grades of organisms of mining axial-flow fan of part mainly comprises first side branch pipe, second side branch pipe and expansion pipe, and the fluid flows into the expansion pipe through first side branch pipe, consumes the energy of noise with the form of resonance and reaches the effect of making an uproar 1=285mm, first radius of bypass r 1=410mm (ventilator internal diameter), second bypass length L 2=190mm, second side branch radius r 2=520mm, the length of the expansion tube L =855mm, and the radius of the expansion tube r =580 mm.
The utility model provides a local mining axial-flow fan with an additional inner intubation type casing, which comprises an inner intubation type casing, a wind collector, a class I machine body, a class I impeller, a class II machine body, a flame-proof three-phase asynchronous motor and a noise elimination diffusion cone; the wind collector, the first-stage machine body and the second-stage machine body sequentially form a shell of the local mining axial-flow fan, blades of the fan are respectively fixed on the impellers to sequentially form a first-stage impeller and a second-stage impeller, the first-stage impeller is located in the first-stage machine body, the second-stage impeller is located in the second-stage machine body, the silencing diffusion cone is located at the rear portion of the second-stage impeller, the explosion-proof three-phase asynchronous motor respectively drives the first-stage impeller and the second-stage impeller to rotate, and the first side branch pipe, the second side branch pipe and the expansion pipe form an inner insertion pipe type shell and are additionally arranged on the outer wall of the second-stage machine.
The utility model provides a pair of add intubate formula casing on II grades of organisms of local mining axial-flow fan, thereby it makes sound energy be eliminated the noise reduction by the part through fluid resonance in the resonant cavity of expansion pipe to locate at the intubate formula casing of ventilation blower. The process is simple, does not need complex treatment means, and is convenient for integrated design. And simultaneously, the utility model discloses have great adjustable space, can carry out the adjustment of structure according to the model needs of difference, also can survey the main noise frequency of ventilation blower simultaneously, the structure of intubate in the pointed design is in order to reach better noise elimination effect. The ventilator with the same model has similar working frequency and structural characteristics, and can be produced in large scale.
Drawings
For a clear explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a local mining axial-flow fan with an internal insertion tube type casing according to an embodiment of the present invention;
Fig. 2 is a schematic structural view of an inner plug-in type housing according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a noise calculation cross-section of a local mining axial-flow fan with an additional inner-insertion-tube-type casing according to an embodiment of the present invention;
Fig. 4 is a schematic view of arrangement of noise calculation points of each noise calculation cross section of the local mining axial-flow fan with an additional inner insertion tube type casing according to the embodiment of the present invention;
Fig. 5 is a comparative analysis diagram of the maximum sound pressure level of each noise calculation point on the cross section 1 of the local mining axial-flow ventilator with the internal-duct type casing and the local mining axial-flow ventilator without the internal-duct type casing provided by the embodiment of the present invention.
Description of the drawings: inner intubation type casing 1, wind collector 2, I class organism 3, I class impeller 4, II class impeller 5, II class organism 6, first side branch pipe 7, second side branch pipe 8, expansion pipe 9.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless explicitly stated or limited otherwise, the terms "mounted", "connected" and "connected" are to be understood broadly, and may for example be fixedly connected, detachably connected or integrally connected; either mechanically or electrically: they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the utility model provides a local mining axial-flow fan with an additional inner intubation type casing, which comprises an inner intubation type casing, a wind collector, a I-level machine body, a I-level impeller and a II-level impeller, II level organisms, flame-proof type three-phase asynchronous motor, noise elimination diffusion cone, wind collector and I level organism and II level organisms have constituted local mining axial-flow fan's shell in proper order, and the ventilation blower blade is fixed respectively and constitutes I level impeller and II level impeller on the impeller in proper order, I level impeller be located I level organism in, II level impeller be located II level organism, the noise elimination diffusion cone be located II level impeller's rear portion, flame-proof type three-phase asynchronous motor drives I level impeller and II level impeller rotation respectively, first side branch pipe, second side branch pipe and expansion pipe have constituted interpolation tubular casing and have installed the outer wall at II level organisms of II level impeller department additional.
As shown in fig. 2, the utility model provides an add intubate formula casing of installing on II grades of organisms of local mining axial-flow fan mainly comprises first side branch pipe, the other branch pipe of second and expansion pipe, wherein the first side branch length L of intubate formula casing 1=285mm, first radius of bypass r 1=410mm (ventilator internal diameter), second bypass length L 2=190mm, second side branch radius r 2=520mm, length of the expansion tube L =855mm, the radius of the expansion tube r =580 mm.
As shown in fig. 3, in order to accurately and comprehensively calculate the noise reduction effect of the local mining axial-flow fan with the added inner-intubation type casing, noise calculation is performed on four planes in the range of 0-855 mm in the wake area of the secondary impeller of the fan with the added inner-intubation type casing and without the added inner-intubation type casing. Because the design size of the inner intubation type shell is 855mm, four sections are set in the design range of the inner intubation type shell for noise calculation in the selection of noise calculation points, wherein the distance between every two sections is 100mm, and the four sections from the air inlet to the air outlet are named as a section 1, a section 2, a section 3 and a section 4 in sequence. The distances from the section 1 to the air inlet of the ventilator are 2480mm respectively, the distances from the section 2 to the air inlet of the ventilator are 2580mm respectively, the distances from the section 3 to the air inlet of the ventilator are 2680mm respectively, and the distances from the section 4 to the air inlet of the ventilator are 2780mm respectively.
As shown in fig. 4, on the selected cross section, the rotation axis is taken as the center of a circle, 7 noise calculation points are respectively taken in the radial direction, the distances from the center of the circle to the noise calculation points are 270mm, 290mm, 310mm, 330mm, 350mm, 370mm and 390mm, and every two adjacent noise calculation points are 20mm apart.
The method adopts a numerical calculation method to analyze the vortex amount change of the inner flow field of the ventilator when the inner cannula type shell is additionally arranged and the inner cannula type shell is not additionally arranged in the impeller rotating area, and the vortex amount value of the inner flow field of the local mining axial flow ventilator without the inner cannula type shell is found to be 1244.3s through comparison -1The vorticity value of the inner flow field of the local mining axial-flow fan with the inner inserting pipe type shell is 954.1s -1The vortex quantity of the inner flow field of the local mining axial-flow fan with the added inner insertion pipe type shell is reduced by 23.3 percent relative to the vortex quantity of the inner flow field of the local mining axial-flow fan without the added inner insertion pipe type shell. Therefore, the inner inserting tube type shell structure enables the vorticity of the inner flow field of the local mining axial-flow fan to be reduced, the phenomenon of flow disorder is improved, the flow loss is reduced, and the efficiency of the fan is improved.
And analyzing the data of each noise calculation point, and obtaining a noise spectrogram through FFT (fast Fourier transform). The noise spectrogram of the local mining axial-flow fan with the added inner intubation type casing and without the added inner intubation type casing is compared to find that the noise reduction effect in a high-frequency area is better and the low-frequency noise reduction effect is weaker. Under the condition of a rated rotating speed, the local mining axial-flow fan with the inner insertion pipe type shell is mainly used for reducing noise aiming at high-frequency noise with the frequency of 2000Hz and above. The maximum sound pressure level of the local mining axial-flow fan with the inner insertion pipe type shell is 146.32 dB, the maximum sound pressure level of the local mining axial-flow fan without the silencer is 149.25dB, and noise is reduced by 2.93 dB. As shown in fig. 5, taking the section 1 as an example, by performing a comparative analysis on the maximum sound pressure level of each noise calculation point on the section 1 of the local mining axial-flow fan without and with the added inner intubation type casing, it can be obviously seen that the maximum sound pressure level of each noise calculation point of the local mining axial-flow fan with the added inner intubation type casing is reduced, and is reduced by 2.43% on average, thereby proving that the local mining axial-flow fan with the added inner intubation type casing has the noise reduction effect.
The utility model discloses an install interior bushing type casing additional to local mining axial-flow fan under the prerequisite of taking into account the ventilation blower performance, improve near fluidic turbulent state of ventilation blower casing, with the energy of resonant form noise elimination in the resonance intracavity of expansion pipe, the noise abatement propagates outwards to reach the effect of the amortization of making an uproar of falling.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (1)
1. A local mining axial-flow fan with an inner insertion pipe type shell is characterized in that the inner insertion pipe type shell is additionally arranged on a II-stage machine body of the local mining axial-flow fan;
the inner intubation type shell mainly comprises a first side branch pipe, a second side branch pipe and an expansion pipe, wherein the first side branch length L of the inner intubation type shell 1=285mm, first radius of bypass r 1=410mm, second side branch length L 2=190mm, second side branch radius r 2=520mm, the length of the expansion tube L =855mm, the radius of the expansion tube r =580 mm;
The device also comprises an air collector, a first-stage machine body, a first-stage impeller, a second-stage machine body, an explosion-proof three-phase asynchronous motor and a silencing diffusion cone;
The wind collector, the I-stage machine body and the II-stage machine body sequentially form a shell of the local mining axial-flow fan, the I-stage impeller is located in the I-stage machine body, the II-stage impeller is located in the II-stage machine body, the silencing diffusion cone is located at the rear part of the II-stage impeller, the flame-proof type three-phase asynchronous motor respectively drives the I-stage impeller and the II-stage impeller to rotate, and the inner insertion tube type shell is formed by a first side branch tube, a second side branch tube and an expansion tube and is additionally arranged on the outer wall of the II-stage machine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921495862.0U CN211082326U (en) | 2019-09-10 | 2019-09-10 | Local mining axial-flow fan of intubate formula casing installs additional |
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| CN201921495862.0U CN211082326U (en) | 2019-09-10 | 2019-09-10 | Local mining axial-flow fan of intubate formula casing installs additional |
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| CN211082326U true CN211082326U (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454425A (en) * | 2019-09-10 | 2019-11-15 | 代元军 | A kind of local mine axial flow formula ventilation blower installing inner-intubation casing additional |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454425A (en) * | 2019-09-10 | 2019-11-15 | 代元军 | A kind of local mine axial flow formula ventilation blower installing inner-intubation casing additional |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200831 Address after: 201306 No. 300, SHUIHUA Road, Pudong New Area, Shanghai Co-patentee after: Yuan Jun of the Dynasty Patentee after: SHANGHAI DIANJI University Address before: 830091 Xinjiang Institute of engineering, Nanchang Road, saybak District, Urumqi, Xinjiang Uygur Autonomous Region Patentee before: Yuan Jun of the Dynasty |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200724 Termination date: 20210910 |
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| CF01 | Termination of patent right due to non-payment of annual fee |