Negative pressure suction type wind load simulation cabin

Abstract

The invention discloses a negative pressure suction type wind load simulation cabin which comprises a drainage area, a flow stabilization area, an acceleration area, a test area, a lengthening area and a vacuum collection tank which are sequentially connected to form a sealed communication air duct. According to the invention, a traditional positive pressure blowing mode is replaced by a negative pressure suction mode, and the structure optimization of each functional module and the precise regulation and control of the control system are combined, so that the instantaneous high-speed wind environment simulation with low energy consumption, fast response and high precision is realized; the device is small in size, convenient to operate, suitable for various test scenes of material wind load tolerance, load throwing, small component aerodynamic characteristics and the like, and high in practicability.

Description

Technical Field

[0001] This invention belongs to the technical field of wind simulation test equipment, specifically relating to a negative pressure suction type wind load simulation chamber. Background Technology

[0002] Traditional wind simulation equipment mostly adopts the "positive pressure blowing" mode, which uses a high-power fan to continuously push airflow forward to simulate the wind environment. Such equipment has the following drawbacks: First, it has extremely high energy consumption and requires long-term operation of a high-power fan; second, the airflow start-up response is slow, making it difficult to quickly reach the target wind speed and meet the requirements for simulating instantaneous wind loads; third, the equipment is bulky, including a large fan and a long air duct, which is inconvenient for laboratory installation and use; and fourth, the wind speed control accuracy is limited, making it difficult to adapt to different wind speed requirements in various test scenarios. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a negative pressure intake wind load simulation chamber that solves the problems of high energy consumption, slow start-up, large size, and insufficient control precision of traditional wind simulation equipment, and achieves accurate simulation of instantaneous high-speed wind environments.

[0004] This invention is achieved through the following technical solution: A negative pressure intake-type air load simulation chamber includes a diversion zone, a stabilization zone, an acceleration zone, a test zone, an extension zone, a vacuum collection tank, a vacuum system, and a control system. The diversion zone, stabilization zone, acceleration zone, test zone, extension zone, and vacuum collection tank are sequentially and sealed together along the airflow direction, forming a complete L-shaped ventilation duct. The axis of the diversion zone is perpendicular to the ground. The stabilization zone, acceleration zone, test zone, extension zone, and vacuum collection tank are parallel to the ground. The vacuum system is connected to the vacuum collection tank. The control system is electrically connected to the vacuum system and the actuators within the air duct. The front end of the diversion zone is connected to the atmosphere and has a 3° contraction structure along the airflow direction. The interior between the diversion zone and the stabilization zone is arranged along the airflow direction... The system includes a silencing module and a flow guiding module. The silencing module is installed parallel to the ground. The flow guiding module is installed at a 45° angle to the ground and located at the bend of the L-shaped ventilation duct. The silencing module is made of porous sound-absorbing cotton. The flow guiding module is an arc-shaped flow guide plate. A flow rectifier module is installed inside the flow stabilization zone. The flow rectifier module is a honeycomb-shaped flow rectifier grid. The axis of the flow rectifier module is consistent with the airflow direction. The acceleration zone has a variable cross-section structure. The front cross-section size of the acceleration zone is four times that of the rear cross-section size, and the inner wall of the acceleration zone is a smooth transition curved surface. The test zone is a rectangular channel with a uniform cross-section. Symmetrical electric pressure-resistant lifting doors are provided on the left and right sides of the test zone along the airflow direction. The electric pressure-resistant lifting doors are located on the sides of the test zone. The perimeter is equipped with an elastic seal; the electric pressure-resistant lifting door has an observation hole; a high-strength tempered glass sight glass is installed inside the observation hole; the extended section has a variable cross-section structure that expands at 7° along the airflow direction and is symmetrical on both sides; an adjusting door is provided inside the extended section; the adjusting door is equipped with an electric drive mechanism; the electric drive mechanism is electrically connected to the control system and can drive the adjusting door to move in a direction perpendicular to the airflow direction; a quick-opening door is provided inside the vacuum collection tank; the quick-opening door is installed at 45° along the airflow direction of the test area; the quick-opening door adopts a high-strength sealing structure and is equipped with a quick-opening door control unit; the quick-opening door control unit is electrically connected to the control system; the vacuum system The system includes a vacuum pump assembly; a vacuum system control unit is also provided; the vacuum system control unit is electrically connected to the control system and can adjust the vacuum level in the vacuum collection tank and maintain stable pressure; the control system is electrically connected to a wind speed acquisition unit and a pressure acquisition unit; the wind speed acquisition unit is located inside the test area and is used to collect wind speed data in the test area in real time; the pressure acquisition unit is located inside the vacuum collection tank and is used to collect pressure data inside the vacuum collection tank in real time; a sealing gasket is provided between the high-strength tempered glass sight glass of the observation hole and the electric pressure-resistant lifting door; the diameter of the observation hole is 50~100mm, and 2~3 observation holes are evenly distributed along the height direction of the electric pressure-resistant lifting door.

[0005] The beneficial effects of this invention are: This invention features a compact structure and small size, facilitating laboratory installation. The design of the electric pressure-resistant lifting door and observation port enhances operational convenience, making it suitable for various testing scenarios such as material wind load tolerance, load throwing, and aerodynamic characteristics of small components. It adopts a "negative pressure suction" mode instead of the traditional "positive pressure blowing," and combines the coordinated design of the diversion zone, stabilization zone, and acceleration zone with the rapid response structure of the quick-opening door, thus solving the inherent defects of traditional equipment. Through the linkage control system to regulate the vacuum degree and adjust the door opening, coupled with multi-module structural optimization, it achieves low energy consumption, fast response, and high precision, representing a significant improvement over traditional wind simulation equipment. Attached Figure Description

[0006] The present invention will now be described in further detail with reference to the accompanying drawings.

[0007] Figure 1 This is a schematic diagram of the structure of the present invention.

[0008] Figure 2 This is a partial schematic diagram of the present invention.

[0009] The diagram shows: 1-Drainage zone; 11-Silencer module; 12-Flow guide module; 2-Stabilizing zone; 21-Rectifying module; 3-Acceleration zone; 4-Test zone; 5-Extended zone; 51-Regulating gate; 6-Vacuum collection tank; 61-Quick-opening gate; 7-Vacuum system; 8-Control system. Detailed Implementation

[0010] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0011] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0012] In the description of this invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0013] like Figure 1 , Figure 2 The negative pressure suction type wind load simulation chamber shown includes a flow diversion zone 1, a noise reduction module 11, a flow guiding module 12, a flow stabilization zone 2, a flow rectification module 21, an acceleration zone 3, a test zone 4, an extension zone 5, a regulating door 51, a vacuum collection tank 6, a quick-opening door 61, a vacuum system 7, and a control system 8.

[0014] The flow diversion zone 1, flow stabilization zone 2, acceleration zone 3, test zone 4, extension zone 5, and vacuum collection tank 6 are sequentially and sealed together along the airflow direction to form a complete L-shaped ventilation duct; the axis of the flow diversion zone 1 is set perpendicular to the ground; the flow stabilization zone 2, acceleration zone 3, test zone 4, extension zone 5, and vacuum collection tank 6 are set parallel to the ground.

[0015] The vacuum system 7 is connected to the vacuum collection tank 6 and is used to extract air from the tank to establish a preset vacuum level. The vacuum system 7 is a vacuum pump assembly. The vacuum system 7 is equipped with a vacuum system control unit. The vacuum system control unit is electrically connected to the control system 8 and can adjust the vacuum level in the vacuum collection tank 6 and maintain stable pressure. The vacuum pump assembly receives instructions from the control system 8 through the vacuum system control unit and precisely adjusts the vacuum level in the vacuum collection tank 6.

[0016] The control system 8 is electrically connected to the vacuum system 7 and the actuators in the air duct, serving as the "brain" of the equipment. It connects the sensing and execution units of each component to achieve fully automatic control. The control system 8 is electrically connected to a wind speed acquisition unit and a pressure acquisition unit. The wind speed acquisition unit is located inside the test area 4 and is used to collect wind speed data in the test area 4 in real time. The pressure acquisition unit is located inside the vacuum collection tank 6 and is used to collect pressure data in the vacuum collection tank 6 in real time. The control system 8 obtains data in real time through the wind speed acquisition unit and the pressure acquisition unit, and controls the vacuum system 7, the electric drive mechanism and the quick-opening door 61 in a coordinated manner to achieve precise wind speed control and "one-button" test operation.

[0017] The front end of the diversion zone 1 is connected to the atmosphere, and the rear end is sealed to the front end of the stabilization zone 2. It is responsible for introducing external airflow and has a 3° contraction structure along the airflow direction. Inside the diversion zone 1 and the stabilization zone 2, a noise reduction module 11 and a flow guide module 12 are arranged sequentially along the airflow direction. The noise reduction module 11 is installed parallel to the ground. The flow guide module 12 is installed at a 45° angle to the ground and is located at the bend of the L-shaped ventilation duct. The noise reduction module 11 is made of porous sound-absorbing cotton. The flow guide module 12 is an arc-shaped flow guide plate. The diversion zone 1 adopts a 3° contraction structure to guide the airflow in. The internal noise reduction module 11 can reduce the noise when the airflow is introduced. The flow guide module 12 is installed at a 45° angle to the ground and can guide the airflow smoothly into the stabilization zone 2, avoiding airflow rotation or eddies.

[0018] The front end of the stabilizing zone 2 is connected to the guiding zone 1, and the rear end is connected to the front end of the acceleration zone 3, which is used to rectify the airflow direction. The stabilizing zone 2 is equipped with a rectification module 21. The rectification module 21 is a honeycomb rectification grid. The axis of the rectification module 21 is consistent with the airflow direction. The fixed honeycomb rectification module 21 inside the stabilizing zone 2 can further sort the airflow and ensure that the airflow flows stably along the axial direction, providing a stable foundation for subsequent acceleration.

[0019] The acceleration zone 3 has a variable cross-section structure; the front end of the acceleration zone 3 is connected to the steady flow zone 2, and the rear end is connected to the front end of the test zone 4. The variable cross-section design achieves airflow acceleration; the front cross-sectional size of the acceleration zone 3 is 4 times the rear cross-sectional size, and the inner wall of the acceleration zone 3 is a smooth transition curved surface; the acceleration zone 3 adopts a "coarse at the front and fine at the back" variable cross-section design, with the front cross-sectional area being 4 times that of the rear, utilizing the Venturi effect to rapidly accelerate the airflow, ultimately forming a high-speed airflow in the test zone 4.

[0020] The test area 4 is connected to the acceleration area 3 at the front end and to the front end of the extension area 5 at the rear end, providing a stable airflow environment for the wind load test. The test area 4 is a rectangular channel with a uniform cross-section. Symmetrical electric pressure-resistant lifting gates are provided on the left and right sides of the test area 4 along the airflow direction. Elastic seals are provided around the edges of the electric pressure-resistant lifting gates. Observation holes are provided on the electric pressure-resistant lifting gates. High-strength tempered glass sight glasses are installed in the observation holes. A sealing gasket is provided between the high-strength tempered glass sight glasses and the electric pressure-resistant lifting gates. The diameter of the observation holes is 50~100mm, and 2~3 observation holes are evenly distributed along the height direction of the electric pressure-resistant lifting gates. The test area 4 ensures stable high-speed airflow through the design of a rectangular channel with a uniform cross-section. The electric pressure-resistant lifting gates on the left and right sides facilitate the placement and removal of test samples. The elastic seals at the edges ensure the sealing of the channel. The high-strength tempered glass sight glasses in the observation holes allow for real-time observation of the test process.

[0021] The extended zone 5 is connected to the test zone 4 at the front end and to the vacuum collection tank 6 at the rear end, and the airflow is controlled by the regulating door 51. The extended zone 5 has a variable cross-section structure that expands at 7° along the airflow direction and is symmetrical on both sides. The extended zone 5 is equipped with a regulating door 51. The regulating door 51 is equipped with an electric drive mechanism. The electric drive mechanism is electrically connected to the control system 8 and can drive the regulating door 51 to move in a direction perpendicular to the airflow direction. The 7° expanded variable cross-section structure of the extended zone 5, together with the movable regulating door 51, allows for precise fine-tuning of the airflow speed by adjusting the channel cross-sectional size through the electric drive mechanism 52.

[0022] The vacuum collection tank 6 is sealed to the rear end of the extended area 5, and a negative pressure environment can be formed inside, which is the core source of the "suction" power. The vacuum collection tank 6 is equipped with a quick-opening door 61. The quick-opening door 61 is installed at 45° along the airflow direction of the test area 4. The quick-opening door 61 adopts a high-strength sealing structure and is equipped with a quick-opening door control unit. The quick-opening door control unit is electrically connected to the control system 8. The vacuum collection tank 6 can be quickly opened and closed through the quick-opening door 61 installed at 45°. The high-strength sealing structure ensures the pressure bearing capacity and works with the vacuum system 7 to quickly establish and maintain the preset negative pressure.

[0023] Work steps: Preparation phase: Close the quick-opening door 61 of the vacuum collection tank 6 to form a sealed space inside the tank; input the target wind speed through the control system 8, and the system automatically calculates and sets the corresponding vacuum degree of the vacuum collection tank 6 and the opening degree of the regulating door 51 of the extension zone 5; Vacuuming stage: Control system 8 starts vacuum system 7 to extract air from vacuum collection tank 6 until pressure acquisition unit detects that the pressure inside the tank has reached the preset value, vacuum system 7 switches to pressure holding state; Test phase: Control system 8 opens quick-opening door 61 instantly through quick-opening door control unit, creating a pressure difference between the negative pressure inside vacuum collection tank 6 and the external atmospheric pressure, and airflow is quickly drawn in from the front end of the diversion area 1; Airflow control stage: The airflow passes through the diversion zone 1 (silencing and guiding), the stabilization zone 2 (rectification), and the acceleration zone 3 (speed increase) in sequence, forming a stable instantaneous high-speed airflow in the test zone 4. The wind speed acquisition unit provides real-time data feedback, and the control system 8 fine-tunes the opening of the regulating gate 51 to ensure accurate wind speed. End Phase: After the test is completed, the control system 8 closes the quick-opening door 61, stops the vacuum system 7, resets the regulating door 51, unlocks the electric pressure-resistant lifting door, and the equipment returns to its initial state.

[0024] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention shall fall within the scope of protection of this invention.

Claims

1. A negative pressure intake-type wind load simulation chamber, characterized in that: It includes a flow diversion zone (1), a flow stabilization zone (2), an acceleration zone (3), a test zone (4), an extension zone (5), a vacuum collection tank (6), a vacuum system (7), and a control system (8); the flow diversion zone (1), the flow stabilization zone (2), the acceleration zone (3), the test zone (4), the extension zone (5), and the vacuum collection tank (6) are sequentially and sealed together along the airflow direction to form a complete L-shaped ventilation duct; the axis of the flow diversion zone (1) is set perpendicular to the ground; the flow stabilization zone (2), the acceleration zone (3), the test zone (4), the extension zone (5), and the vacuum collection tank (6) are set parallel to the ground; the vacuum system (7) is connected to the vacuum collection tank (6); the control system (8) is electrically connected to the vacuum system (7) and the actuators in the air duct respectively.

2. The negative pressure inhalation type wind load simulation chamber according to claim 1, characterized in that: The front end of the diversion zone (1) is connected to the atmosphere and has a 3° contraction structure along the airflow direction; the interior between the diversion zone (1) and the stabilization zone (2) is provided with a sound-absorbing module (11) and a flow-guiding module (12) in sequence along the airflow direction; the sound-absorbing module (11) is installed parallel to the ground; the flow-guiding module (12) is installed at a 45° angle to the ground and is located at the bend of the L-shaped ventilation duct; the sound-absorbing module (11) is made of porous sound-absorbing cotton; the flow-guiding module (12) is an arc-shaped flow-guiding plate.

3. The negative pressure suction type wind load simulation chamber according to claim 1, characterized in that: The stabilizing zone (2) is equipped with a rectification module (21); the rectification module (21) is a honeycomb rectification grid; the axis of the rectification module (21) is consistent with the airflow direction.

4. The negative pressure inhalation wind load simulation chamber according to claim 1, characterized in that: The acceleration zone (3) is a variable cross-section structure; the front cross-section size of the acceleration zone (3) is 4 times the rear cross-section size, and the inner wall of the acceleration zone (3) is a smooth transition surface.

5. The negative pressure inhalation wind load simulation chamber according to claim 1, characterized in that: The test area (4) is a rectangular channel with equal cross-section. The test area (4) is provided with symmetrical electric pressure-resistant lifting gates on the left and right sides along the airflow direction. The electric pressure-resistant lifting gates are provided with elastic sealing elements around their edges. The electric pressure-resistant lifting gates are provided with observation holes. High-strength tempered glass sight glasses are installed in the observation holes.

6. The negative pressure inhalation wind load simulation chamber according to claim 1, characterized in that: The extended section (5) has a variable cross-section structure that expands at 7° along the airflow direction and is symmetrical on the left and right sides; the extended section (5) is provided with an adjustment door (51); the adjustment door (51) is equipped with an electric drive mechanism; the electric drive mechanism is electrically connected to the control system (8) and can drive the adjustment door (51) to move in a direction perpendicular to the airflow direction.

7. The negative pressure inhalation wind load simulation chamber according to claim 1, characterized in that: The vacuum collection tank (6) is equipped with a quick-opening door (61); the quick-opening door (61) is installed at 45° along the airflow direction of the test area (4); the quick-opening door (61) adopts a high-strength sealing structure, and the quick-opening door (61) is equipped with a quick-opening door control unit; the quick-opening door control unit is electrically connected to the control system (8).

8. The negative pressure inhalation wind load simulation chamber according to claim 1, characterized in that: The vacuum system (7) is a vacuum pump set; the vacuum system (7) is equipped with a vacuum system control unit; the vacuum system control unit is electrically connected to the control system (8) and can adjust the vacuum level in the vacuum collection tank (6) and maintain stable pressure.

9. The negative pressure inhalation wind load simulation chamber according to claim 1, characterized in that: The control system (8) is electrically connected to a wind speed acquisition unit and a pressure acquisition unit; the wind speed acquisition unit is located inside the test area (4) and is used to collect wind speed data in the test area (4) in real time; the pressure acquisition unit is located inside the vacuum collection tank (6) and is used to collect pressure data in the vacuum collection tank (6) in real time.

10. The negative pressure inhalation wind load simulation chamber according to claim 5, characterized in that: A sealing gasket is provided between the high-strength tempered glass sight glass of the observation hole and the electric pressure-resistant lifting door; the diameter of the observation hole is 50~100mm, and there are 2~3 observation holes evenly distributed along the height direction of the electric pressure-resistant lifting door.

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