CN113294194B - Tunnel jet fan experimental device - Google Patents
Tunnel jet fan experimental device Download PDFInfo
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- CN113294194B CN113294194B CN202110770670.1A CN202110770670A CN113294194B CN 113294194 B CN113294194 B CN 113294194B CN 202110770670 A CN202110770670 A CN 202110770670A CN 113294194 B CN113294194 B CN 113294194B
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- 238000002474 experimental method Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 9
- 238000009423 ventilation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/02—Test models
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a tunnel jet fan experimental device, which comprises: the rotary table is provided with two centrosymmetric guide pipe mounting holes, the guide pipes are of a folded structure, and the mounting grooves are through pipes with large middle pipe diameters and small two-end pipe diameters; the brushless motor and the electronic speed regulator are electrically connected and then arranged in the mounting groove, two ends of the mounting groove are respectively connected with a flow guide pipe, and the vertical sections of the two flow guide pipes are embedded and fixed in the flow guide pipe mounting holes; when the experiment is carried out, the experimental device can rotate around the central shaft of the rotary disc in a manual operation mode. Through the arrangement of the turntable and the components matched with the turntable, the experimental device can be used for adjusting the deflection angle of the jet fan in an operation and control manner, can better simulate a jet flow field in actual engineering and obtain an experimental result with higher reference value during experimental operation.
Description
Technical Field
The invention relates to the technical field of tunnel wind speed test equipment, in particular to a tunnel jet fan experimental device.
Background
Longitudinal ventilation is widely used in road tunnels as a simple mechanical ventilation means. Jet fans are the primary ventilation devices in longitudinal ventilation systems, and the induced air flow is essentially a high velocity air jet. Meanwhile, the reasonable arrangement of the jet fans not only influences the ventilation effect in the whole tunnel, but also directly relates to the energy consumption of the tunnel operation. Therefore, analyzing the characteristics of the air jet of the highway tunnel and optimizing the arrangement of jet fans in the highway tunnel has great significance for perfecting the design of a ventilation system of a tunnel complex and reducing the ventilation cost of tunnel operation.
The traditional tunnel ventilation experimental device mostly adopts the form that an axial flow fan is combined with a rectification section to supply air, and uniform section air speed is formed in a traffic lane of a tunnel model. However, this approach has some disadvantages, such as: (1) the air supply with uniform section wind speed is not consistent with the actual engineering; (2) experimental research cannot be carried out on the ventilation effect of the jet fan in different installation modes; (3) the flow field of the area near the jet flow fan is complex, and experiments related to the area cannot be verified.
Therefore, aiming at the defects of the existing tunnel jet fan experimental device, the invention provides the tunnel jet fan experimental device which can adjust the deflection angle of the jet fan in the experimental process, can better simulate the jet flow field in the practical engineering and obtain the experimental result with higher reference value, and the problem to be solved by the technical personnel in the field is urgently needed.
Disclosure of Invention
The invention aims to provide a tunnel jet fan experimental device which can adjust the deflection angle of a jet fan in the experimental process, can better simulate the jet flow field in the actual engineering and obtain an experimental result with higher reference value. In order to solve the above problems, the technical solution provided by the present invention is as follows:
the invention relates to an experimental device for a tunnel jet fan, which comprises: the rotary table is provided with two centrosymmetric guide pipe mounting holes, the guide pipes are of a folded structure, and the mounting grooves are through pipes with large pipe diameters at the middle parts and small pipe diameters at the two ends; the brushless motor and the electronic speed regulator are electrically connected and then arranged in the mounting groove, two ends of the mounting groove are respectively connected with one flow guide pipe, and the vertical sections of the two flow guide pipes are embedded and fixed in the flow guide pipe mounting holes; when the experiment is carried out, the experimental device can rotate around the central shaft of the turntable in a manual operation mode. The honeycomb duct with the folded structure is characterized in that a first section of the honeycomb duct is a horizontal honeycomb duct, a second section of the honeycomb duct is at an angle of 90 degrees with the first section, a third section of the honeycomb duct is also a horizontal honeycomb duct, a third section of the honeycomb duct is at an angle of 90 degrees with the second section, and the first section and the third section are respectively arranged on two sides of the second section in opposite directions. Therefore, by arranging the turntable and the components matched with the turntable, the experimental device can adjust the deflection angle of the jet fan in an operation and control manner, can better simulate the jet flow field in actual engineering and obtain an experimental result with higher reference value during experimental operation. When the experimental device is used, air is sucked in from the flow guide pipe at one end of the experimental device, is pressurized by the brushless motor and then is ejected from the other end of the experimental device, and a jet flow field formed by the induction of the jet flow fan in actual tunnel engineering is simulated under the experimental conditions of ensuring geometric similarity, motion similarity and power similarity according to the Euler similarity criterion.
Further, the turntables comprise an upper turntable and a lower turntable, the diameter of the upper turntable is larger than that of the lower turntable, a step structure is formed between the upper turntable and the lower turntable, and the step structure is used for clamping and embedding the experimental device in an experimental device mounting hole preset in the top of the tunnel model. Thus, the experimental device is simpler and more convenient to manually control and rotate.
Furthermore, the upper turntable and the lower turntable are of an integrally formed structure or are assembled after being formed in a split mode; the rotating disc comprises two parts which are symmetrical along the installation direction of the flow guide pipe, and the two parts of the rotating disc are fixedly connected after the flow guide pipe is installed. The rotating disc is divided into two parts which are bilaterally symmetrical, so that the honeycomb duct is convenient to install, and after the honeycomb duct is installed at a preset position, the two parts of the rotating discs are connected in a butt joint mode and fixed well.
Furthermore, the edge of the upper surface of the rotating disc is provided with deflection angle scale marks of 0-30 degrees along the axis of the installation direction of the draft tube. The upper and lower parts of the axis are provided with deflection angle scale marks of 0-30 degrees, namely the whole experimental device can rotate 0-30 degrees around the axis clockwise or anticlockwise. Furthermore, the edge of the upper surface of the rotary table is provided with 0-15-degree deflection angle scale marks along the axis of the installation direction of the flow guide pipe. Therefore, the test range can be observed and recorded very conveniently, and the experimental result of the jet fan is more comprehensive and accurate.
Furthermore, the honeycomb duct is a PVC pipe, the length of the horizontal section of the honeycomb duct with the folding structure is 3cm, and the length of the vertical section of the honeycomb duct with the folding structure is 6 cm; the mounting groove is a rubber pipe groove, the pipe diameter of the middle part of the mounting groove is 5cm, the length of the connecting parts at two ends of the mounting groove is 3cm, and the pipe diameters of the connecting parts at two ends of the mounting groove are the same as those of the flow guide pipe; the mounting groove with the pipe diameter size of honeycomb duct can be according to n according to actual efflux fan diameter: 1 reduce the setting.
The tunnel jet fan experimental device provided by the invention has the beneficial effects that:
through the arrangement of the turntable and the components matched with the turntable, the experimental device can be used for adjusting the deflection angle of the jet fan in an operation and control manner, can better simulate a jet flow field in actual engineering and obtain an experimental result with higher reference value during experimental operation.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of the experimental device of the tunnel jet fan of the invention;
FIG. 2 is a schematic view of a longitudinal section structure of the experimental device of the tunnel jet fan of the present invention along the axis of the draft tube;
FIG. 3 is a schematic view of the surface structure of a turntable in the experimental device of the tunnel jet blower of the present invention.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features, and advantages of the present invention more comprehensible, specific embodiments of the present invention are described below with reference to the accompanying drawings.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to fig. 3, an experimental apparatus for a tunnel jet fan of the present embodiment includes: the rotary table comprises a rotary table 1, a flow guide pipe 2, a mounting groove 3, a brushless motor 4 and an electronic speed regulator 5, wherein two flow guide pipe mounting holes 11 which are centrosymmetric are formed in the rotary table 1, the flow guide pipe 2 is of a folded structure, and the mounting groove 3 is a through pipe with a large middle pipe diameter and small pipe diameters at two ends; brushless motor 4 and electronic governor 5 adopt to set up in mounting groove 3 after the electricity is connected, and a honeycomb duct 2 is connected respectively at the both ends of mounting groove 3, and the vertical section of two honeycomb ducts 2 inlays admittedly in honeycomb duct mounting hole 11.
As a preferred embodiment, the turntable 1 comprises an upper turntable 101 and a lower turntable 102, the diameter of the upper turntable 101 is larger than that of the lower turntable 102, a step structure 12 is formed between the upper turntable 101 and the lower turntable 102, the step structure 12 is used for clamping and embedding the experimental device in an experimental device mounting hole preset at the top of the tunnel model, and the experimental device can rotate around the central axis of the turntable 1 in a manual operation mode.
Further preferably, the upper turntable 101 and the lower turntable 102 are integrally formed or assembled after being formed separately; the rotary disc 1 comprises two parts which are symmetrical along the installation direction of the draft tube 2, and the two parts of the rotary disc 1 are fixedly connected after the draft tube 2 is installed.
Preferably, the edge of the upper surface of the rotating disc 1 is provided with a deflection angle scale mark of 0-30 degrees along the axis of the installation direction of the draft tube 2. More preferably, the edge of the upper surface of the rotating disc 1 is provided with 0-15 degree deflection angle scale marks along the axis of the installation direction of the draft tube 2, and the 0-15 degree deflection angle scale marks are respectively arranged in the clockwise direction and the anticlockwise direction of the axis.
In a more specific embodiment, the honeycomb duct 2 is a PVC pipe, the length of the horizontal section of the honeycomb duct 2 with the folding structure is 3cm, and the length of the vertical section of the honeycomb duct 2 with the folding structure is 6 cm; the mounting groove 3 is a rubber pipe groove, the pipe diameter of the middle part of the mounting groove 3 is 5cm, the length of the connecting parts at two ends of the mounting groove 3 is 3cm, and the pipe diameters of the connecting parts at two ends of the mounting groove 3 are the same as the pipe diameter of the flow guide pipe 2; the pipe diameter size of mounting groove 3 and honeycomb duct 2 can be according to n according to actual efflux fan diameter: 1 reduce the setting. The length dimensions of the segments and parts of the draft tube 2 and the mounting groove 3 are merely the dimensional relationships between the segments and parts, and can be proportionally enlarged or reduced according to actual needs.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (2)
1. The utility model provides a tunnel efflux fan experimental apparatus which characterized in that, experimental apparatus includes: the automatic flow-guiding device comprises a rotary table (1), flow guiding pipes (2), a mounting groove (3), a brushless motor (4) and an electronic speed regulator (5), wherein two flow guiding pipe mounting holes (11) which are centrosymmetric are formed in the rotary table (1), the flow guiding pipes (2) are of a folding structure, and the mounting groove (3) is a through pipe with a large middle pipe diameter and small pipe diameters at two ends;
the brushless motor (4) and the electronic speed regulator (5) are electrically connected and then are arranged in the mounting groove (3), two ends of the mounting groove (3) are respectively connected with one flow guide pipe (2), and the vertical sections of the two flow guide pipes (2) are embedded and fixed in the flow guide pipe mounting holes (11); when in experiment, the experimental device can rotate around the central shaft of the turntable (1) manually;
the turntable (1) comprises an upper turntable (101) and a lower turntable (102), the diameter of the upper turntable (101) is larger than the diameter of the lower turntable (102), a step structure (12) is formed between the upper turntable (101) and the lower turntable (102), the step structure (12) is used for embedding the experimental device in an experimental device mounting hole preset at the top of the tunnel model in a clamping manner, the upper turntable (101) and the lower turntable (102) are integrally formed or assembled after being formed in a split mode, the rotary disc (1) comprises two parts which are symmetrical along the installation direction of the draft tube (2), after the draft tube (2) is installed, the two parts of the rotating disc (1) are jointed and fixed, the edge of the upper surface of the turntable (1) is provided with 0-30-degree deflection angle scale marks along the axis of the installation direction of the draft tube (2).
2. The tunnel jet fan experimental device according to claim 1, wherein the draft tube (2) is a PVC pipe, the horizontal section of the draft tube (2) in the folded structure is 3cm in length, and the vertical section of the draft tube is 6cm in length; the mounting groove (3) is a rubber pipe groove, the pipe diameter of the middle part of the mounting groove (3) is 5cm, the length of the middle part of the mounting groove is 5cm, the length of the connecting parts at two ends of the mounting groove (3) is 3cm, and the pipe diameters of the connecting parts at two ends of the mounting groove (3) are the same as the pipe diameter of the flow guide pipe (2);
the mounting groove (3) and the pipe diameter size of the flow guide pipe (2) can be measured according to the actual jet fan diameter according to n: 1 reduce the setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110770670.1A CN113294194B (en) | 2021-07-08 | 2021-07-08 | Tunnel jet fan experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110770670.1A CN113294194B (en) | 2021-07-08 | 2021-07-08 | Tunnel jet fan experimental device |
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| Publication Number | Publication Date |
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| CN113294194A CN113294194A (en) | 2021-08-24 |
| CN113294194B true CN113294194B (en) | 2022-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110770670.1A Active CN113294194B (en) | 2021-07-08 | 2021-07-08 | Tunnel jet fan experimental device |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202391812U (en) * | 2011-11-10 | 2012-08-22 | 黄生 | Variable-direction air inlet and outlet type jet fan |
| CN209818351U (en) * | 2019-03-01 | 2019-12-20 | 上海进贤机电科技有限公司 | Inclination air exhaust jet fan |
| CN210152707U (en) * | 2019-04-11 | 2020-03-17 | 青岛市市政工程设计研究院有限责任公司 | Fan device for tunnel of subway station |
| CN212177522U (en) * | 2019-12-31 | 2020-12-18 | 英飞同仁(江苏)风机有限公司 | Jet fan hoisting structure |
| CN112985743B (en) * | 2021-02-25 | 2023-03-24 | 西北工业大学 | Plane cascade experimental device capable of independently adjusting installation angle |
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- 2021-07-08 CN CN202110770670.1A patent/CN113294194B/en active Active
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