Movable low-noise blowing device
By designing a mobile low-noise blowing device, the existing wind tunnel equipment occupies a large site, has high construction costs and cannot meet mobile testing, and realizes simulated eight-level high wind environment and convenient wind noise testing.
Patent Information
- Application Number
- CN202323551452.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2033-12-26
AI Technical Summary
The existing wind tunnel equipment used for wind noise testing has large site occupancy, high construction cost, complex testing process and inability to meet the requirements of mobile testing.
Design a mobile low-noise blowing device, including a trumpet-shaped air inlet, an inlet silence module, a power fan module, an outlet silence module, an outlet silence module and a rectification device, which can simulate outdoor wind blowing environment, and simulate a maximum of eight-level strong winds. It has the function of reading out wind speed and noise sound pressure level.
It simulates outdoor wind blowing environment, with extremely low noise and does not affect wind noise detection. It has mobility and convenient testing functions, can be used indoors and outdoors, and has a modular design for easy segmented transportation.
Smart Images
Figure CN222528902U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of aviation testing equipment and relates to an air supply device for wind noise testing, in particular to a mobile low-noise blowing device. Background Art
[0002] For products installed outdoors, such as cabinets and outdoor units, wind noise testing is required, that is, testing the noise emitted by the product in a windy environment. Therefore, the device used for testing is required to not only simulate the outdoor wind environment, but also test the wind noise level of the product in a windy environment. Because the existing technology is measured in a laboratory environment through wind tunnel equipment. This method requires wind tunnel equipment to occupy a large area, has a high construction cost, and a complex testing process. It requires multiple personnel to perform test operations. In addition, the wind tunnel equipment is permanently fixed and cannot meet the requirements of mobile testing. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a mobile low-noise blowing device, which can simulate outdoor wind blowing environment and can simulate up to level eight gale, and has the function of reading the wind speed of the simulated wind environment and the noise sound pressure level generated by the product in the wind environment.
[0004] The technical solution of the utility model is as follows:
[0005] A mobile low-noise blowing device comprises an air inlet, an inlet silencer module, a power fan module, an outlet silencer module, a nozzle and a rectifying device, wherein the rear end of the air inlet is connected to the front end of the inlet silencer module, the rear end of the inlet silencer module is connected to the front end of the power fan module, the rear end of the power fan module is connected to the front end of the outlet silencer module, the rear end of the outlet silencer module is connected to the front end of the nozzle, the rear end of the nozzle is an air outlet, and the rectifying device is installed on the air outlet; except for the air inlet and the air outlet, other parts of the blowing device are closed to the outside.
[0006] Furthermore, the air inlet is a trumpet-shaped air inlet, with the large end of the trumpet facing outwards and the small end of the trumpet facing the inlet silencer module.
[0007] Furthermore, it also includes a small wheel, which is installed below the blowing device.
[0008] Furthermore, the connection between the air inlet and the inlet silencer module, the connection between the inlet silencer module and the power fan module, the connection between the power fan module and the outlet silencer module, and the connection between the outlet silencer module and the nozzle are all provided with reinforced connection flanges.
[0009] Furthermore, a sealing ring is provided between the reinforced connection flanges.
[0010] Further, small wheels are arranged in pairs under each reinforced connecting flange.
[0011] Furthermore, the nozzle is a convergent section structure, and the air outlet of the nozzle is the small end.
[0012] Furthermore, an anemometer and a sound level meter are arranged in the nozzle.
[0013] Furthermore, a sound insulation layer is provided outside the section from the inlet silencer module to the outlet silencer module of the blowing device.
[0014] Furthermore, both the inlet silencer module and the outlet silencer module have a structure with a built-in matrix silencer. The matrix silencer is composed of a plurality of parallel square columns. There is a gap between two adjacent square column silencers. The surface of a single square column is a perforated plate, and the perforated plates are filled with silencer cotton.
[0015] Furthermore, the parallel direction of the square column is the same as the inlet and outlet direction of the airflow.
[0016] The beneficial effects of the utility model are:
[0017] 1. The utility model can simulate outdoor wind environment, and can simulate up to level 8 gale;
[0018] 2. The self-noise of the utility model is extremely small, and does not affect the wind noise detection of the device on the parts at all;
[0019] 3. The utility model has the function of reading the wind speed of the simulated wind environment and the noise sound pressure level generated by the product in the wind environment;
[0020] 4. The hair dryer can move by itself, is easy to use, and can be used indoors and outdoors;
[0021] 5. The blowing device is modularly designed, and each module is connected by flanges, which is easy to disassemble and transport in sections. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solution of the implementation method of the utility model patent, the following is a brief introduction to the drawings required for use in the implementation method. It should be understood that the following drawings only show certain embodiments of the utility model patent and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 Schematic diagram of a mobile low-noise blowing device provided by an embodiment of the utility model;
[0024] Figure 2 A side view of a mobile low-noise blowing device provided by an embodiment of the utility model;
[0025] Figure 3A schematic diagram of the inlet and muffler of a mobile low-noise blowing device provided in an embodiment of the utility model;
[0026] Figure 4 The outlet of the mobile low-noise blowing device (product testing position) provided by the embodiment of the utility model;
[0027] Figure 5 A cross-sectional view of a silencing module of a mobile low-noise blowing device provided in an embodiment of the utility model;
[0028] Figure 6 A cross-sectional view of a power fan of a mobile low-noise blowing device provided in an embodiment of the utility model;
[0029] Figure 7 A cross-sectional view of a rectifier device for a mobile low-noise blowing device provided by an embodiment of the utility model;
[0030] Figure 8 A schematic diagram of an air inlet of a mobile low-noise blowing device provided in an embodiment of the utility model;
[0031] Among them, 1 is the air inlet, 2 is the inlet silencer module, 3 is the power fan module, 4 is the outlet silencer module, 5 is the nozzle, 6 is the rectifier, 7 is the anemometer, 8 is the sound level meter, 9 is the sound insulation layer, and 10 is the product to be tested. DETAILED DESCRIPTION
[0032] This section is an embodiment of the utility model, which is used to explain and illustrate the technical solution of the utility model. In the absence of conflict, the embodiments of the utility model and the features in the embodiments can be combined with each other.
[0033] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships as given in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or case referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated connection; it can be a mechanical connection or a point connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.
[0035] Embodiment 1:
[0036] A mobile low-noise blowing device comprises an air inlet 1, an inlet silencer module 2, a power fan module 3, an outlet silencer module 4, a nozzle 5 and a rectifying device 6, wherein the rear end of the air inlet 1 is connected to the front end of the inlet silencer module 2, the rear end of the inlet silencer module 2 is connected to the front end of the power fan module 3, the rear end of the power fan module 3 is connected to the front end of the outlet silencer module 4, the rear end of the outlet silencer module 4 is connected to the front end of the nozzle 5, the rear end of the nozzle 5 is an air outlet, and the rectifying device 6 is installed on the air outlet; except for the air inlet 1 and the air outlet, other parts of the blowing device are closed to the outside.
[0037] The air inlet 1 is a trumpet-shaped air inlet, with the large end of the trumpet facing outward and the small end of the trumpet facing the inlet silencer module 2.
[0038] The utility model also comprises a small wheel, and the small wheel is arranged under the blowing device.
[0039] Reinforced connection flanges are provided at the connection between the air inlet 1 and the inlet silencer module 2, at the connection between the inlet silencer module 2 and the power fan module 3, at the connection between the power fan module 3 and the outlet silencer module 4, and at the connection between the outlet silencer module 4 and the nozzle 5.
[0040] A sealing ring is provided between the reinforced connecting flanges.
[0041] The small wheels are arranged in pairs under each reinforced connecting flange.
[0042] The nozzle 5 is a contracted section structure, and the air outlet of the nozzle 5 is a small end.
[0043] An anemometer 7 and a sound level meter 8 are arranged in the nozzle 5 .
[0044] A sound insulation layer 9 is provided outside the section from the inlet silencer module 2 to the outlet silencer module 4 of the blowing device.
[0045] The inlet silencer module 2 and the outlet silencer module 4 both have a built-in matrix silencer structure. The matrix silencer is composed of multiple parallel square columns. There is a gap between two adjacent square column silencers. The surface of a single square column is a perforated plate, and the perforated plates are filled with silencer cotton.
[0046] The parallel direction of the square column is the same as the inlet and outlet direction of the airflow.
[0047] Embodiment 2:
[0048] The invention discloses a simple mobile low-noise blowing device, which is designed in a modular manner and comprises an air inlet bell mouth module, an inlet silencer module, a power fan module, an outlet silencer module, a rectifier module and a nozzle module.
[0049] The power fan serves as the power device of the device, sucks air from the atmosphere, and the airflow flows through the air intake bell module, the inlet silencer module, the power fan module, the outlet silencer module, the rectifier module and the nozzle module in sequence to produce a low-noise wind environment.
[0050] The device is equipped with movable small wheels, which can walk on the ground and move to a specific position convenient for testing through the drive of a motor.
[0051] The test device includes: a speed measurement module and a noise test module. The speed measurement module is equipped with an anemometer, which can measure the wind speed of the simulated wind environment. The noise test module is equipped with a sound level meter, which can measure the noise of the product.
[0052] The utility model provides a simple mobile low-noise blowing device, see Figure 1 and Figure 2 The mobile low-noise blowing device includes: an air intake bell module, an inlet silencer module, a power fan module, an outlet silencer module, a rectifier module, and a nozzle module. Each module is connected by a flange, and there is a sealing ring between the flanges to play a sealing role. The inlet silencer module, the power fan module, and the outlet silencer module are wrapped with a 100mm thick sound insulation.
[0053] The air intake bell module is a bell-shaped guide device made of thin-walled plates. Its typical size is a bell mouth that shrinks from 2.3m×2.3m to a square pipe of 2m×2m.
[0054] The inlet silencer module and the outlet silencer module are equipped with matrix silencers. The silencers are composed of multiple parallel square columns. There is a gap between two adjacent square column silencers. The surface of a single square column is a perforated plate, which plays a supporting and sound-permeable role. The perforated plates are filled with silencer cotton.
[0055] The power fan module consists of 4 low-noise fans with a fan diameter of 0.8m and an outer shell of 1m×1m square. The fan noise is 75dB(A). The fan noise passes through the inlet silencer module, the outlet silencer module, and the sound insulation package, and then passes through the nozzle to generate a maximum wind of 20m / s (level 8 wind). The background noise of the device is 50dB(A).
[0056] The rectifier module contains a stainless steel regular hexagonal honeycomb grille, 200mm along the airflow direction. Its main function is to straighten the turbulent airflow and then accelerate the airflow to the target wind speed through the contraction nozzle.
[0057] The device is equipped with movable small wheels, which can walk on the ground and move to a specific position convenient for testing through the drive of a motor.
[0058] The test device is equipped with a speed measurement module and a noise test module.
[0059] The speed measurement module is a standard anemometer with a measurement range of 0 to 20 m / s, corresponding to a gale of level 8. The noise test module is a sound level meter that can measure noise levels up to 120 dB.
[0060] The utility model is mainly used for quickly measuring the wind noise of products. When installing the mobile low-noise blowing device provided by the utility model, the device can be transported to the test site in sections and then assembled.
[0061] The above only expresses the implementation mode of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. In addition, the parts not detailed in the present invention are all conventional technologies.
Claims
1. A mobile low-noise blowing device, characterized in that: The device comprises an air inlet (1), an inlet silencer module (2), a power fan module (3), an outlet silencer module (4), a nozzle (5) and a rectifying device (6); the rear end of the air inlet (1) is connected to the front end of the inlet silencer module (2), the rear end of the inlet silencer module (2) is connected to the front end of the power fan module (3), the rear end of the power fan module (3) is connected to the front end of the outlet silencer module (4), the rear end of the outlet silencer module (4) is connected to the front end of the nozzle (5), the rear end of the nozzle (5) is an air outlet, and the rectifying device (6) is installed on the air outlet; except for the air inlet (1) and the air outlet, other parts of the blowing device are closed to the outside.
2. A mobile low-noise blowing device according to claim 1, characterized in that: The air inlet (1) is a trumpet-shaped air inlet, with the large end of the trumpet facing outwards and the small end of the trumpet facing the inlet silencer module (2).
3. A mobile low-noise blowing device according to claim 1, characterized in that: The utility model also comprises a small wheel, and the small wheel is arranged under the blowing device.
4. A mobile low-noise blowing device according to claim 3, characterized in that: The connection between the air inlet (1) and the inlet silencer module (2), the connection between the inlet silencer module (2) and the power fan module (3), the connection between the power fan module (3) and the outlet silencer module (4), and the connection between the outlet silencer module (4) and the nozzle (5) are all provided with reinforced connection flanges.
5. A mobile low-noise blowing device according to claim 4, characterized in that: A sealing ring is provided between the reinforced connecting flanges.
6. A mobile low-noise blowing device according to claim 4, characterized in that: The small wheels are arranged in pairs under each reinforced connecting flange.
7. A mobile low-noise blowing device according to claim 1, characterized in that: The nozzle (5) is a contracted section structure, and the air outlet of the nozzle (5) is the small end.
8. A mobile low-noise blowing device according to claim 7, characterized in that: An anemometer (7) and a sound level meter (8) are arranged inside the nozzle (5).
9. A mobile low-noise blowing device according to claim 1, characterized in that: A sound insulation layer (9) is provided outside a section from the inlet silencer module (2) to the outlet silencer module (4) of the blowing device.
10. A mobile low-noise blowing device according to claim 1, characterized in that: The inlet silencer module (2) and the outlet silencer module (4) are both structures with built-in matrix silencers. The matrix silencers are composed of a plurality of mutually parallel square columns. There is a gap between two adjacent square column silencers. The surfaces of individual square columns are all perforated plates, and silencer cotton is filled between the perforated plates.