Variable air volume damper

Abstract

This utility model discloses a variable air volume valve, belonging to the field of valve technology; it includes a cylindrical seat, a lower flange seat, an upper flange seat, a conical bearing assembly, a support body, and a drive unit. A first fan blade is fixed inside the cylindrical seat; a toothed ring is integrally formed on the outside of the cylindrical seat; the lower flange seat is rotatably disposed inside the cylindrical seat; a second fan blade is fixed inside the lower flange seat; the second fan blade is movably attached to the bottom surface of the first fan blade; a detection frame is fixed on the upper part of the inner side of the upper flange seat, and multiple impeller flow meters are fixed on the detection frame; the impeller flow meters are staggered; the conical bearing assembly includes an upper conical bearing body fixed to the upper flange seat and a lower conical bearing body fixed to the lower flange seat, the rolling ends of the upper and lower conical bearing bodies are movably attached to the outside of the cylindrical seat. The variable air volume valve of this utility model can reduce the installation volume, can be adapted to air ducts, and can adjust the airflow volume with high precision.

Description

Technical Field

[0001] This utility model specifically relates to a variable air volume valve, belonging to the field of valve technology. Background Technology

[0002] Air volume regulating valves are indispensable central air conditioning terminal accessories in ventilation, air conditioning, and air purification projects in industrial plants and civil buildings. They are generally used in air conditioning and ventilation system ducts to regulate the air volume of branch pipes and can also be used for the mixed regulation of fresh and return air. Widely used in HVAC systems of industrial and mining buildings and civil buildings, they precisely regulate airflow and are one of the key devices for controlling ventilation modes in various environments. Existing air volume regulating valves, such as the variable air volume valve disclosed in Chinese Patent Publication No. CN218237799U, use a motor to drive an adjusting plate... The rotation of the valve exposes several through holes in sequence, facilitating air circulation. It allows for adjustment of the air volume at different levels to meet user needs. However, this structure is cylindrical or square tube in shape, which is bulky and takes up floor height. For example, Chinese Patent Publication No. CN221959014U discloses a variable air volume valve. This structure is small in size and flexible in installation. By adjusting the variable air volume terminal of the valve, the intelligent ventilation volume of the system can be precisely adjusted. However, the air volume of this valve cannot be adjusted with high precision and cannot be adapted to existing air ducts. Utility Model Content

[0003] To address the aforementioned issues, this invention proposes a variable air volume valve that can reduce installation volume, adapt to air ducts, and precisely adjust airflow.

[0004] The variable air volume valve of this utility model includes: A cylindrical base, on the inner side of which a first fan blade is fixed; and a toothed ring is integrally formed on the outer side of which the cylindrical base is; A lower flange seat is rotatably disposed inside the cylinder seat; a second fan blade is fixed inside the lower flange seat; the second fan blade is movably attached to the bottom surface of the first fan blade; An upper flange seat is provided, and a testing frame is fixed to the upper inner side of the upper flange seat. Multiple impeller flow meters are fixed on the testing frame. The impeller flow meters are arranged in a staggered manner. A tapered bearing assembly, comprising an upper tapered bearing body fixed to an upper flange seat and a lower tapered bearing body fixed to a lower flange seat, wherein the rolling ends of the upper and lower tapered bearing bodies are movably fitted to the outside of the cylindrical seat and are respectively disposed on the upper and lower parts of the gear ring; A support body, which is fixed between the upper flange seat and the lower flange seat; The drive unit includes a gear reducer, the output gear of which meshes with a ring gear; the drive gear of which is fixed to the output shaft of the motor; the gear reducer is fixed to a support body; and the motor and the impeller flow meter are linked by a controller.

[0005] During assembly, first fix the upper flange seat and the upper tapered bearing body, and then fix the lower flange seat and the lower tapered bearing body. Next, roll the upper flange seat and the lower flange seat onto the inner wall of the cylinder seat. At this time, the tapered surface of the outer wall of the cylinder seat rolls against the upper tapered bearing body and the lower tapered bearing body. Then, fix the distance between the upper flange seat and the lower flange seat through the support body. Finally, fix the drive unit to the support body and install the output end of the drive unit into engagement with the gear ring of the cylinder seat.

[0006] During airflow adjustment, the motor drives the drive gear to rotate, which in turn drives the output gear to rotate. The output gear drives the cylinder seat to rotate synchronously via the gear ring. As the cylinder seat rotates, its outer wall is guided by the upper and lower conical bearing bodies, while its inner wall is guided by the outer walls of the upper and lower flange seats. During rotation, the flow gap can be adjusted by the blades of the first and second fan blades, thereby adjusting the airflow volume. When the airflow passes through the upper flange seat, the impeller flow meter accurately monitors the airflow. The controller calculates the average airflow by averaging multiple airflow values. It then calculates the difference between the current average airflow and the preset airflow, and responds to this difference based on the preset motor step value and the corresponding relationship between the airflow. The controller controls the motor to respond to the airflow, and the impeller flow meter performs closed-loop monitoring of the response value.

[0007] Furthermore, the support body includes a support cylinder, the two ends of which are fixed to the lower flange seat and the upper flange seat by countersunk bolts; a power window is provided on the support cylinder, and a gear reducer is fitted into the power window; a mounting ear is fixed on the gear reducer, and the mounting ear is fixed to the support cylinder by bolts; the support cylinder can support the lower flange seat and the upper flange seat, and complete the fixing of the distance between the lower flange seat and the upper flange seat; the gear reducer is fitted into the power window and fixed to the support cylinder by the mounting ear of the gear reducer.

[0008] Furthermore, the gear reducer includes a housing, on which an output gear and a drive gear are rotatably mounted; the output gear and the drive gear mesh with each other; the output gear protrudes outside the housing; the motor is fixed to the top of the housing and to the drive gear; the motor rotates, controlling the drive gear to rotate synchronously, and the drive gear synchronously drives the output gear to rotate, thereby realizing power output.

[0009] Furthermore, the inner wall of the cylinder seat has an inner annular groove on the top and bottom surfaces of the first fan blade; the outer walls of the upper and lower flange seats are movably fitted into the inner annular groove; a rolling bearing is provided between the outer walls of the upper and lower flange seats and the inner wall of the cylinder seat; the outer wall of the cylinder seat is axially limited and rotated guided by the tapered bearings of the tapered bearing assembly, and the inner wall of the cylinder seat is rotated guided by the rolling bearings.

[0010] Furthermore, the detection frame is composed of a Y-shaped three-pronged beam; each side of the three-pronged beam is provided with an embedded hole, and the impeller flow meter is fitted and fixed with the embedded hole.

[0011] Furthermore, the gap between the first and second fan blades is 1-3mm. The first fan blade inside the cylinder seat is a movable fan blade, and the second fan blade inside the lower flange seat is a fixed fan blade. The air volume can be adjusted by the first and second fan blades, and there is a safe gap between the first and second fan blades during adjustment.

[0012] Compared with the prior art, the variable air volume valve of this utility model does not require air volume adjustment through a flap structure, which can reduce the three-dimensional installation volume. Moreover, the valve can be adapted to the air duct through flanges at both ends. During the adjustment process, multiple impeller flow meters are arranged radially and circumferentially to collect air volume with high precision and are linked with the drive unit in a closed loop to adjust the air volume with high precision. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the variable air volume valve of this utility model.

[0014] Figure 2 This is a schematic diagram of the axial cross-sectional structure of the variable air volume valve of this utility model.

[0015] Figure 3 This is a schematic diagram of the drive unit structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the installation structure of the cylinder seat and lower flange seat of this utility model.

[0017] Figure 5 This is a schematic diagram of another embodiment of the cylindrical base of this utility model.

[0018] Reference numerals in the attached drawings: 1. Cylinder base, 2. First fan blade, 3. Gear ring, 4. Lower flange seat, 5. Second fan blade, 6. Upper flange seat, 7. Detection frame, 8. Impeller flow meter, 9. Upper tapered bearing body, 10. Lower tapered bearing body, 11. Support cylinder, 12. Gear reducer, 13. Output gear, 14. Drive gear, 15. Motor, 16. Mounting lug, 17. Housing base, 18. Inner ring groove, 19. Drive unit. Detailed Implementation

[0019] Example 1: like Figures 1 to 5 The variable air volume valve shown includes: A cylindrical base 1, on the inner side of which a first fan blade 2 is fixed; a toothed ring 3 is integrally formed on the outer side of the cylindrical base 1. The lower flange seat 4 is rotatably disposed inside the cylinder seat 1; a second fan blade 5 is fixed inside the lower flange seat 4; the second fan blade 5 is movably attached to the bottom surface of the first fan blade 2. Upper flange seat 6, with a detection frame 7 fixed on the upper inner side of the upper flange seat 6, and multiple impeller flow meters 8 fixed on the detection frame 7; the impeller flow meters 8 are arranged in a staggered manner; A tapered bearing assembly, comprising an upper tapered bearing body 9 fixed to an upper flange seat 6 and a lower tapered bearing body 10 fixed to a lower flange seat 4, wherein the rolling ends of the upper tapered bearing body 9 and the lower tapered bearing body 10 are movably attached to the outside of the cylindrical seat 1 and are respectively disposed on the upper and lower parts of the toothed ring 3. A support body, which is fixed between the upper flange seat 6 and the lower flange seat 4; The drive unit 19 includes a gear reducer 12, the output gear 13 of which meshes with the gear ring 3; the drive gear 14 of the gear reducer 12 is fixed to the output shaft of the motor 15; the gear reducer 12 is fixed to the support body; the motor 15 and the impeller flow meter 8 are linked through a controller.

[0020] During assembly, first fix the upper flange seat 6 and the upper tapered bearing body 9, and fix the lower flange seat 4 and the lower tapered bearing body 10; then, roll the upper flange seat 6 and the lower flange seat 4 onto the inner wall of the cylindrical seat 1. At this time, the tapered surface of the outer wall of the cylindrical seat 1 rolls against the upper tapered bearing body 9 and the lower tapered bearing body 10; and fix the distance between the upper flange seat 6 and the lower flange seat 4 through the support body. Finally, fix the drive unit 19 to the support body and make the output end of the drive unit 19 mesh with the gear ring 3 of the cylindrical seat 1.

[0021] When adjusting the airflow, motor 15 drives drive gear 14 to rotate, drive gear 14 drives output gear 13 to rotate, and output gear 13 drives cylinder seat 1 to rotate synchronously through gear ring 3. When cylinder seat 1 rotates, the outer wall of cylinder seat 1 is guided to rotate through upper conical bearing body 9 and lower conical bearing body 10, and the inner wall of cylinder seat 1 is guided to rotate through the outer walls of upper flange seat 6 and lower flange seat 4. When cylinder seat 1 rotates, the flow gap can be adjusted by the blades of the first fan blade 2 and the second fan blade 5, thereby adjusting the airflow volume. When the airflow passes through upper flange seat 6, the airflow can be accurately monitored by impeller flow meter 8. The controller calculates the average airflow by averaging multiple airflow values. It calculates the difference between the current average airflow and the preset airflow, and can respond to the difference based on the preset correspondence between motor 15 step value and airflow. The controller controls motor 15 to respond to the airflow and performs closed-loop monitoring of the response value through impeller flow meter 8.

[0022] The support body includes a support cylinder 11, both ends of which are fixed to the lower flange seat 4 and the upper flange seat 6 by countersunk bolts. A power window is provided on the support cylinder 11, and a gear reducer 12 is fitted into the power window. A mounting ear 16 is fixed on the gear reducer 12, and the mounting ear 16 is fixed to the support cylinder 11 by bolts. The support cylinder 11 can support the lower flange seat 4 and the upper flange seat 6, and fix the distance between the lower flange seat 4 and the upper flange seat 6. The gear reducer 12 is fitted into the power window and fixed to the support cylinder 11 by the mounting ear 16 of the gear reducer 12.

[0023] The gear reducer 12 includes a housing 17, on which an output gear 13 and a drive gear 14 are rotatably mounted; the output gear 13 and the drive gear 14 mesh with each other; the output gear 13 protrudes outside the housing 17; the motor 15 is fixed to the top of the housing 17 and is also fixed to the drive gear 14; the rotation of the motor 15 controls the synchronous rotation of the drive gear 14, and the drive gear 14 synchronously drives the output gear 13 to rotate, thereby realizing power output.

[0024] The inner wall of the cylinder seat 1 has an inner ring groove 18 on the top and bottom surfaces of the first fan blade 2; the outer walls of the upper flange seat 6 and the lower flange seat 4 are movably fitted into the inner ring groove 18; a rolling bearing is provided between the outer walls of the upper flange seat 6 and the lower flange seat 4 and the inner wall of the cylinder seat 1; the outer wall of the cylinder seat 1 is axially limited and rotated guided by the tapered bearing of the tapered bearing assembly, and the inner wall of the cylinder seat 1 is rotated guided by the rolling bearing.

[0025] The detection frame 7 is composed of a Y-shaped three-pronged beam; each side of the three-pronged beam is provided with a recessed hole, and the impeller flow meter 8 is fitted and fixed with the recessed hole.

[0026] The gap between the first fan blade 2 and the second fan blade 5 is 1-3mm. The first fan blade 2 inside the cylinder seat 1 is a movable fan blade, and the second fan blade 5 inside the lower flange seat 4 is a fixed fan blade. The air volume can be adjusted by the first fan blade 2 and the second fan blade 5, and there is a safe gap between the first fan blade 2 and the second fan blade 5 during adjustment.

[0027] The above embodiments are merely preferred embodiments of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model are included within the scope of the present utility model.

Claims

1. A variable air volume valve, characterized in that: include: A cylindrical base, on the inner side of which a first fan blade is fixed; and a toothed ring is integrally formed on the outer side of which the cylindrical base is; A lower flange seat is rotatably disposed inside the cylinder seat; a second fan blade is fixed inside the lower flange seat; the second fan blade is movably attached to the bottom surface of the first fan blade; An upper flange seat is provided, and a testing frame is fixed to the upper inner side of the upper flange seat. Multiple impeller flow meters are fixed on the testing frame. The impeller flow meters are arranged in a staggered manner. A tapered bearing assembly, comprising an upper tapered bearing body fixed to an upper flange seat and a lower tapered bearing body fixed to a lower flange seat, wherein the rolling ends of the upper and lower tapered bearing bodies are movably fitted to the outside of the cylindrical seat and are respectively disposed on the upper and lower parts of the gear ring; A support body, which is fixed between the upper flange seat and the lower flange seat; The drive unit includes a gear reducer, the output gear of which meshes with a ring gear; the drive gear of which is fixed to the output shaft of the motor; the gear reducer is fixed to a support body; and the motor and the impeller flow meter are linked by a controller.

2. The variable air volume valve according to claim 1, characterized in that: The support body includes a support cylinder, both ends of which are fixed to a lower flange seat and an upper flange seat by countersunk bolts; a power window is provided on the support cylinder, and a gear reducer is fitted into the power window; a mounting lug is fixed on the gear reducer, and the mounting lug is fixed to the support cylinder by bolts.

3. The variable air volume valve according to claim 1, characterized in that: The gear reducer includes a housing, on which an output gear and a drive gear are rotatably mounted; the output gear and the drive gear mesh with each other; the output gear protrudes outside the housing; the motor is fixed to the top of the housing and is also fixed to the drive gear.

4. The variable air volume valve according to claim 1, characterized in that: The inner wall of the cylinder seat has an inner ring groove on the top and bottom surfaces of the first fan blade; the outer walls of the upper and lower flange seats are movably fitted into the inner ring groove; a rolling bearing is provided between the outer walls of the upper and lower flange seats and the inner wall of the cylinder seat.

5. The variable air volume valve according to claim 1, characterized in that: The detection frame is composed of a Y-shaped three-pronged beam; each side of the three-pronged beam is provided with a recessed hole, and the impeller flow meter is fitted and fixed with the recessed hole.

6. The variable air volume valve according to claim 1, characterized in that: The gap between the first and second fan blades is 1-3 mm.

Images