Rotary variable resistance type air volume and air pressure adjusting device for air pipe experiment

Abstract

The utility model relates to the technical field of ventilator equipment, in particular to a rotary variable resistance type air volume and air pressure adjusting device for an air duct experiment, which comprises a sleeve component, a rotary component and a remote controller, the outer surface of the rotary component is lapped on the inner wall of the sleeve component, an electric actuator is mounted on the sleeve component, and the remote controller is connected with the electric actuator. The electric actuator is in transmission connection with the rotating assembly, and the remote controller is in communication connection with the electric actuator; the sleeve assembly comprises an external connection cylinder and a rotating shaft, and the rotating assembly comprises a first blade, five second blades and a third blade. According to the utility model, the through-flow area of the inlet pipeline of the fan is changed, then the passing air volume and air pressure are changed, the effect of adjusting conditions required by an experiment is achieved, meanwhile, compared with a paper sheet test, the test operation of the device can be manually operated or remotely controlled by the electric actuator, the device is more convenient, the safety coefficient is high, and the test efficiency is improved. And the test efficiency and the safety of the air duct experiment can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilator equipment, in particular to a rotary variable resistance air volume and pressure regulating device for air duct experiments. Background Art

[0002] The fan duct test is a type of experimental method for testing the main data of the fan (hereinafter referred to as "fan"). It can roughly simulate the actual use scenario of the fan and check whether the fan air volume, air pressure, power and other values ​​meet the use requirements. At present, the mainstream test method of the fan duct test is to set a metal mesh in the fan inlet pipe and throw cardboard into the pipe to change the inlet flow area, thereby changing the air volume, air pressure and other data, and then calculate the fan power through the computer system.

[0003] The above test method requires ≥2 persons to operate. One person is required to operate the computer to record process data, and the other person throws paper into the inlet pipe at the front end of the fan. This method has disadvantages and safety hazards. Since the landing point of the paper is uncertain, the person throwing the paper needs to adjust it many times. The noise during the test is huge, and communication between the two people is difficult. Collecting good data is time-consuming and laborious. The negative pressure at the inlet of some fans is large, and the person throwing the paper is easily carried away by the wind and sucked into the pipe or injured, which poses a great safety hazard. The paper is a consumable material. It will be broken after being used many times and cannot be used anymore. It needs to be replenished frequently. It is also time-consuming and labor-intensive to make the corresponding paper, which is not convenient for quick testing of the fan. Utility Model Content

[0004] In order to increase the speed of testing a fan, the utility model provides a rotary variable resistance air volume and pressure regulating device for an air duct experiment.

[0005] The utility model provides a rotary variable resistance air volume and pressure regulating device for air duct experiments, which adopts the following technical solutions:

[0006] A rotary variable resistance air volume and pressure regulating device for air duct experiments, comprising a sleeve assembly, a rotating assembly and a remote controller, wherein the outer surface of the rotating assembly overlaps the inner wall of the sleeve assembly, an electric actuator is mounted on the sleeve assembly, the electric actuator is transmission-connected to the rotating assembly, and the remote controller is communicatively connected to the electric actuator; the sleeve assembly comprises an external connection tube and a rotating shaft, and the rotating assembly comprises blade one, five blades two and blade three.

[0007] By adopting the above technical solution, when the rotating component rotates the crank or operates the remote control to control the electric actuator, it makes a circular motion, evenly spreads out from the overlapping state and becomes non-overlapping, changing the process of the cross-section of the external cylinder, that is, changing the flow area of the air inlet pipe of the fan, and then causing changes in the air volume and air pressure passing through, achieving the effect of adjusting the conditions required for the experiment. At the same time, compared with the paper piece test, the test operation of this device can be manually operated or the electric actuator can be remotely controlled for operation, which is more convenient and fast, conducive to accelerating the speed of the experimental test and saving experimental time.

[0008] Preferably, flanges are fixedly connected to both ends of the external cylinder, three support rods are fixedly connected to both ends of the rotating shaft, the other ends of the six support rods are fixedly connected to the inner wall of the external cylinder, and every three corresponding support rods are arranged in a circular array along the inside of the external cylinder.

[0009] By adopting the above technical solution, the external cylinder is detachably connected to the fan through the flange, which is convenient for maintenance and replacement of the external cylinder.

[0010] Preferably, the first blade, the five second blades and the third blade all include a collar and four fan blades. Every four corresponding fan blades are fixedly connected to the inside of the collar along the inner wall in a circular array. The through holes of the five second blades and the third blade are rotatably connected to the outer surface of the rotating shaft, the through hole of the first blade is fixedly connected to the outer surface of the rotating shaft, and the first blade, the five second blades and the third blade are linearly arranged along the length direction of the rotating shaft.

[0011] By adopting the above technical solution, the first blade, the five second blades and the third blade are adjacent to each other and stick together along the length direction of the central column. By rotating the third blade, the adjacent second blades are gradually driven to achieve the overlapping or non-overlapping state, accelerating the experimental measurement.

[0012] Preferably, a crank is fixedly connected to the outer surface of the third blade, a sliding groove is formed in the outer surface of the external cylinder, the crank is located inside the arc-shaped groove, the length of the crank is less than the length of the arc-shaped groove, the length of the arc-shaped groove is one-fourth of the circumference of the external cylinder, a pulling hole is formed in the crank, four sliding grooves are formed in the outer surfaces of the seven collars, each sliding groove corresponds to each fan blade one by one, and four sliders adapted to the sliding grooves are fixedly connected to one side of the five second blades and the third blade, and each slider is slidably connected to the inside of the corresponding sliding groove.

[0013] By adopting the above technical solution, when the data shows deviation, it is not necessary to manually adjust the number or position of the cardboard, and only the crank needs to be rotated back. Each group of experiments can save at least 2 / 5 of the time.

[0014] Preferably, the electric actuator comprises a motor, an outer surface of the motor is fixedly connected to an outer surface of a rotating shaft, a terminal end of an output shaft of the motor is fixedly connected to one side of blade three, and the motor is communicatively connected to a remote controller.

[0015] By adopting the above technical solution, the rotation amplitude of the current blade two and blade three can be calculated through the servo feedback of the motor, which saves experimental time and speeds up the testing of the fan.

[0016] Preferably, the crank handle is located at one end of the arc-shaped groove, each of the sliders is located at one end of the corresponding slide groove, and the leaves of blade one, blade two and blade three completely overlap.

[0017] By adopting the above technical solution, the blades are completely overlapped, and data before the rotation starts can be tested.

[0018] Preferably, the crank handle is located at the other end of the arc groove, each of the sliders is located at the other end of the corresponding slide groove, and the leaves of blade one, blade two and blade three do not completely overlap.

[0019] By adopting the above technical solution, the five blades two and three are rotated to different angles. According to the rotation angle of the blades, the wind pressure, air volume and other data of the fan under different wind resistance can be measured.

[0020] In summary, the utility model has the following beneficial technical effects:

[0021] 1. The device is provided with a rotating assembly, a remote control and an electric actuator. When the handle is shaken or the remote control is operated to control the electric actuator, the blades one, two and three of the rotating assembly move in a circular motion, and are evenly arranged from an overlapping state to non-overlapping, changing the process of changing the cross section of the external tube, that is, changing the flow area of ​​the fan inlet duct, which in turn causes the air volume and air pressure passing through to change, achieving the effect of adjusting the conditions required for the experiment. At the same time, compared with the paper test, the test operation of the device can be operated manually or by remotely controlling the electric actuator, which is more convenient and has a high safety factor, and can effectively improve the efficiency and safety of the air duct experiment test;

[0022] 2. The device is provided with a slider and a slide slot. Among blade one, blade two and blade three, the planes of two adjacent blades overlap, and blade three performs circular motion. The slider on blade three slides from one end of the slide slot of adjacent blade two to the other end, thereby driving the adjacent blade two to rotate. The slider on the sliding blade two drives the next blade two to perform circular motion until the staff stops shaking the handle or operates the remote control to stop the rotation of the motor, thereby speeding up the speed of testing the fan. There is no need to regularly replace the cardboard, saving the time and labor cost of making the cardboard, and avoiding the manual throwing of paper pieces.

[0023] 3. When operating the crank of this device, when the data shows deviation, there is no need to manually adjust the quantity or position of the cardboard. It only needs to rotate the crank back. Each group of experiments can save at least 2 / 5 of the time. When operating the remote control, through the servo feedback of the motor, the rotation amplitudes of the current blade two and blade three can be calculated, saving the experimental time and accelerating the speed of the test fan. Brief Description of the Drawings

[0024] Figure 1 is a schematic structural view of a rotary variable resistor air volume and air pressure regulating device for air duct experiments of the present utility model;

[0025] Figure 2 is a front view of a rotary variable resistor air volume and air pressure regulating device for air duct experiments of the present utility model;

[0026] Figure 3 is a three-dimensional structural explosion schematic view of a rotary variable resistor air volume and air pressure regulating device for air duct experiments of the present utility model;

[0027] Figure 4 is a schematic structural view of the rotary assembly of a rotary variable resistor air volume and air pressure regulating device for air duct experiments of the present utility model when not unfolded;

[0028] Figure 5 is a schematic structural view of the rotary assembly of a rotary variable resistor air volume and air pressure regulating device for air duct experiments of the present utility model when partially unfolded;

[0029] Figure 6 is a schematic structural view of the sleeve assembly of a rotary variable resistor air volume and air pressure regulating device for air duct experiments of the present utility model.

[0030] Description of the Reference Numerals:

[0031] 1. Sleeve assembly; 11. Outer connecting cylinder; 12. Support rod; 13. Flange; 14. Central column;

[0032] 2. Rotary assembly; 21. Blade one; 22. Blade two; 23. Blade three; 24. Crank; 25. Slide groove; 26. Slide block;

[0033] 3. Pulling hole. Detailed Embodiment

[0034] The following will further describe the present utility model in detail with reference to the attached Figures 1 - 6 drawings.

[0035] An embodiment of the present utility model discloses a rotary variable resistor air volume and air pressure regulating device for air duct experiments.

[0036] Refer to Figure 1 、 Figure 3, including a sleeve assembly 1, a rotating assembly 2 and a remote control. The outer surface of the rotating assembly 2 is overlapped with the inner wall of the sleeve assembly 1. An electric actuator (known technology) is installed on the sleeve assembly 1. The existing electric actuator can be used to control the rotating assembly 2 to rotate. The electric actuator is transmission-connected to the rotating assembly 2. The remote control is communication-connected with the electric actuator. The staff operates the remote control to remotely control the electric actuator to make the rotating assembly 2 rotate in a circle, thereby changing the air volume and pressure of the fan inlet pipe, completing the experimental measurement, and avoiding artificial throwing of paper pieces; the sleeve assembly 1 includes an external tube 11 and a center column 14, and the rotating assembly 2 includes a blade 1 21, five blades 22 and a blade 3 23.

[0037] Reference Figure 1 , Figure 3 , Figure 6 Both ends of the external tube 11 are fixedly connected with flanges 13, and the external tube 11 is installed on the air inlet duct of the fan through the flanges 13. Both ends of the central column 14 are fixedly connected with three support rods 12, and the other ends of the six support rods 12 are fixedly connected to the inner wall of the external tube 11. Every three corresponding support rods 12 are arranged in a circular array along the inside of the external tube 11. The central column 14 and the support rods 12 connect the rotating assembly 2 and the sleeve assembly 1. At the same time, the support rods 12 support the external tube 11 to reduce the possibility of deformation of the external tube 11.

[0038] Reference Figure 3 , Figure 5 , blade one 21, five blade twos 22 and blade three 23 all include a ring and four fan leaves, blade one 21, five blade twos 22 and blade three 23 are all located inside the external tube 11, and each corresponding four fan leaves are fixedly connected to the inside of the ring in a circular array along the inner wall of the ring, that is, blade one 21, five blade twos 22 and blade three 23 themselves are hollow, use less material, and are light in weight. At the same time, in actual production, they can be appropriately adjusted according to factors such as material strength, modal data, and material. The through holes of the five blade twos 22 and blade three 23 are all rotatably connected to the outer surface of the center column 14, and the through hole of blade one 21 is fixedly connected to the outer surface of the center column 14. Blade one 21, five blade twos 22 and blade three 23 are linearly arranged along the length direction of the center column 14, and blade one 21, five blade twos 22 and blade three 23 are adjacent to each other in the length direction of the center column 14.

[0039] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6, a crank 24 is fixedly connected to the outer surface of the third blade 23. A chute 25 is formed on the outer surface of the external cylinder 11. The crank 24 is located inside the arc-shaped groove. The length of the crank 24 is less than that of the arc-shaped groove. The length of the arc-shaped groove is one-eighth of the circumference of the external cylinder 11. That is, with the central column 14 as the center, the crank 24 can rotate 45° from one end to the other end of the arc-shaped groove. The crank 24 moves within the arc-shaped groove, driving the third blade 23 to rotate circumferentially on the inner wall of the external cylinder 11. A pulling hole 3 is provided on the crank 24, and an extension item such as a rope can be inserted into the pulling hole 3 to reduce the force for the staff to pull the third blade 23, facilitating the staff to pull the crank 24.

[0040] Refer to Figure 2 , Figure 3 , Figure 4 , Figure 2 It is also a structural diagram when the five second blades 22 and the third blade 23 are unfolded. Four chutes 25 are formed on the outer surfaces of the seven collars, and each chute 25 corresponds to each fan blade. Four sliders 26 adapted to the chutes 25 are fixedly connected to one side of the five second blades 22 and the third blade 23, and each slider 26 is slidably connected to the inside of the corresponding chute 25. The blades such as the five second blades 22 and the third blade 23 drive each other to rotate through the notches. During the rotation process, the blades will be evenly arranged until after the crank rotates 45°, the blades will cover the cross-section of the external cylinder 11, that is, the rotating assembly 2 covers the inlet cross-section of the fan.

[0041] The electric actuator includes a motor. The outer surface of the motor is fixedly connected to the outer surface of the central column 14. The end of the output shaft of the motor is fixedly connected to one side of the third blade 23. The motor is communicatively connected to the remote controller. When the staff conducts experiments, they can manually rotate the crank 24 to adjust the coincidence degree of the first blade 21, the five second blades 22 and the third blade 23, or can also use the electric actuator, or can remotely control the motor through the remote controller to adjust the coincidence degree of the first blade 21, the five second blades 22 and the third blade 23.

[0042] Refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , the crank 24 is located at one end of the arc-shaped groove, and each slider 26 is located at one end of the corresponding chute 25. The fan blades of the first blade 21, the five second blades 22 and the third blade 23 are completely coincident. When the experiment has not started, the first blade 21, the five second blades 22 and the third blade 23 are completely coincident, that is, the planes of adjacent two blades are coincident.

[0043] Refer to Figure 2 , Figure 4 , Figure 5, the crank 24 is located at the other end of the arc-shaped groove, each slider 26 is located at the other end of the corresponding sliding groove 25, and the fan blades of the first blade 21, the five second blades 22 and the third blade 23 do not completely overlap. The five second blades 22 and the third blade 23 drive each other to rotate through the sliding groove 25 and the slider 26. During the rotation process, the first blade 21, the five second blades 22 and the third blade 23 will be evenly arranged. Until the crank 24 rotates 45°, the first blade 21, the five second blades 22 and the third blade 23 will cover the inlet section of the outer cylinder 11.

[0044] The implementation principle of a rotary variable resistance air volume and air pressure regulating device for air duct experiments in an embodiment of the present utility model is as follows:

[0045] 1. The staff shakes the crank 24, causing the crank 24 to perform a circular motion along the length direction of the arc-shaped groove. The third blade 23 performs a circular motion. At the same time, the five second blades 22 sequentially rotate on the inner wall of the outer cylinder 11 and perform a circular motion. The first blade 21, the five second blades 22 and the third blade 23 are evenly arranged from the overlapping state and become non-overlapping. Until the crank rotates 45°, the first blade 21, the five second blades 22 and the third blade 23 will cover the cross-section of the outer cylinder 11. The staff can also operate the remote control to control the motor to drive the third blade 23 to rotate, and similarly cause the five second blades 22 to perform a circular motion and be evenly arranged from the overlapping state to become non-overlapping;

[0046] 2. Among the first blade 21, the five second blades 22 and the third blade 23, the planes of adjacent two blades coincide. The third blade 23 performs a circular motion. The slider 26 on the third blade 23 slides from one end of the sliding groove 25 of the adjacent second blade 22 to the other end, thereby driving the adjacent second blade 22 to rotate. The slider 26 on the sliding second blade 22 drives the next second blade 22 to perform a circular motion until the staff stops shaking the crank 24 or operates the remote control to stop the rotation of the motor;

[0047] 3. The process of the first blade 21, the five second blades 22 and the third blade 23 being evenly arranged from the overlapping state to becoming non-overlapping is the process of changing the cross-section of the outer cylinder 11, that is, changing the flow area of the air inlet pipe of the fan, which in turn causes the air volume and air pressure passing through to change, achieving the effect of adjusting the experimental conditions required. Compared with the paper sheet test, the test operation of this device is more convenient, has a high safety factor, and can effectively improve the test efficiency and safety of the air duct experiment;

[0048] When measuring the total air intake and air pressure of the fan, this device does not need to be installed. To test the values of the fan's air volume, air pressure, power, etc., connect the air inlet of the fan and the flange 13 together with bolts and nuts, and then conduct experiments to test the values of the fan's air volume, air pressure, power, etc. During actual production, the specifications of the sleeve assembly and the rotating assembly can be appropriately adjusted according to factors such as material strength, modal data, and material. When the air inlet pipe of the fan is a square pipe or a cylinder, the external cylinder 11 can also be a square pipe or a cylinder to adapt to the air inlet pipe of the fan.

[0049] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rotary variable resistance air volume and pressure regulating device for air duct experiments, characterized in that: The invention comprises a sleeve assembly (1), a rotating assembly (2) and a remote controller, wherein the outer surface of the rotating assembly (2) overlaps the inner wall of the sleeve assembly (1), an electric actuator is mounted on the sleeve assembly (1), the electric actuator is transmission-connected to the rotating assembly (2), and the remote controller is communicatively connected to the electric actuator; the sleeve assembly (1) comprises an external connection tube (11) and a central column (14), and the rotating assembly (2) comprises a blade one (21), five blade twos (22) and a blade three (23).

2. A rotary variable resistance air volume and pressure regulating device for air duct experiments according to claim 1, characterized in that: Both ends of the external tube (11) are fixedly connected to flanges (13), both ends of the central column (14) are fixedly connected to three support rods (12), the other ends of the six support rods (12) are fixedly connected to the inner wall of the external tube (11), and every three corresponding support rods (12) are arranged in a circular array along the interior of the external tube (11).

3. A rotary variable resistance air volume and pressure regulating device for air duct experiments according to claim 2, characterized in that: The blade one (21), the five blade twos (22) and the blade three (23) each comprise a collar and four leaflets, each corresponding four leaflets being fixedly connected to the inside of the collar in a circular array along the inner wall of the collar, through holes being opened at the axes of the seven collars, the through holes of the five blade twos (22) and the blade threes (23) being rotatably connected to the outer surface of the central column (14), the through hole of the blade one (21) being fixedly connected to the outer surface of the central column (14), and the blade one (21), the five blade twos (22) and the blade three (23) being linearly arranged along the length direction of the central column (14).

4. A rotary variable resistance air volume and pressure regulating device for air duct experiments according to claim 3, characterized in that: The outer surface of the blade three (23) is fixedly connected with a crank (24), the outer surface of the external tube (11) is provided with a sliding groove (25), the crank (24) is located inside the arc groove, the length of the crank (24) is less than the length of the arc groove, the length of the arc groove is one eighth of the circumference of the external tube (11), and the crank (24) is provided with a pulling hole (3).

5. A rotary variable resistance air volume and pressure regulating device for air duct experiments according to claim 4, characterized in that: Four slide grooves (25) are formed on the outer surfaces of the seven collars, and each slide groove (25) corresponds to each fan leaf one by one. Four sliders (26) adapted to the slide grooves (25) are fixedly connected to one side of the five blades 2 (22) and 3 (23), and each slider (26) is slidably connected to the inside of the corresponding slide groove (25).

6. A rotary variable resistance air volume and pressure regulating device for air duct experiments according to claim 5, characterized in that: The electric actuator comprises a motor, the outer surface of the motor is fixedly connected to the outer surface of the central column (14), the end of the motor output shaft is fixedly connected to one side of the blade three (23), and the motor is in communication connection with the remote controller.

7. A rotary variable resistance air volume and pressure regulating device for air duct experiments according to claim 6, characterized in that: The crank handle (24) is located at one end of the arc-shaped groove, each of the sliders (26) is located at one end of the corresponding slide groove (25), and the leaves of the blade one (21), the five blades two (22) and the blade three (23) completely overlap.

8. The rotary variable resistance air volume and pressure regulating device for air duct experiments according to claim 6, characterized in that: The crank handle (24) is located at the other end of the arc groove, each of the sliders (26) is located at the other end of the corresponding slide groove (25), and the leaves of the blade one (21), the five blades two (22) and the blade three (23) do not completely overlap.

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