Marine anti-explosion centrifugal fan
By combining magnetic attraction and buffer components, the vibration and noise problems of explosion-proof centrifugal fans are solved, achieving the effects of shock absorption and noise reduction, and protecting the bearings and the crew environment.
Patent Information
- Application Number
- CN202520266450.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Marine explosion-proof centrifugal fans generate vibrations when running at high speeds, which leads to increased friction between the impeller shaft and bearings, resulting in severe noise pollution and affecting the lives and work of the crew.
The system uses magnetic attraction to counteract vibration and a buffer assembly to reduce shock. The repulsive force between the upper and lower magnets and the damping effect of the buffer solution reduce fan vibration and prevent bearing wear and noise interference.
It effectively reduced fan vibration and noise, protected bearings, and improved the working environment for crew members.
Smart Images
Figure CN223839415U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of explosion-proof centrifugal fan technology, and in particular to a marine explosion-proof centrifugal fan. Background Technology
[0002] Marine explosion-proof centrifugal fans are a type of ventilation fan. They mainly consist of an impeller, casing, coupling, and shaft. The impeller is the primary component for generating air pressure and transmitting energy. The casing is mainly used to introduce and exhaust gas, while converting some of the gas's kinetic energy into pressure energy. The coupling connects the motor and the fan, transmitting torque. The high-speed rotating impeller accelerates the gas, which enters from the shaft and becomes radially oriented before entering the diffuser. In the diffuser, the gas changes its flow direction, the cross-sectional area of the duct increases, the airflow slows down, and the pressure increases.
[0003] When marine explosion-proof centrifugal fans operate at high speeds, they generate vibrations. Under the influence of these vibrations, the friction between the impeller shaft and bearings intensifies, and continuous vibration leads to accelerated bearing wear. Moreover, the vibration of marine explosion-proof centrifugal fans is also a major source of noise. Therefore, the vibration of marine explosion-proof centrifugal fans not only affects their own structure, but the noise generated in the enclosed environment of a ship can also seriously interfere with the work and life of the crew. Based on the above problems, this application proposes a marine explosion-proof centrifugal fan. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a marine explosion-proof centrifugal fan to solve the problems mentioned in the background section.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A marine explosion-proof centrifugal fan includes a mounting base. The explosion-proof centrifugal fan body is fixedly mounted on the top of the mounting base. An adjustment component is provided at the bottom of the mounting base. A fixing ring is fixedly mounted at the bottom of the mounting base. An internally threaded tube is mounted inside the fixing ring via a bearing. A stud is threaded inside the internally threaded tube. An upper magnet is fixedly mounted at the bottom of the stud. A limiting component is provided on the surface of the stud to facilitate its positioning. A placement base plate is provided below the mounting base. A lower magnet is fixedly mounted on the top of the placement base plate. A buffer component is provided between the top of the placement base plate and the bottom of the mounting base.
[0007] Preferably, the adjustment assembly includes a fixed plate fixedly installed at the bottom of the mounting base. A rotating shaft is rotatably mounted inside the fixed plate. A throttle handle is fixedly mounted at the left end of the rotating shaft, and a drive wheel is fixedly mounted at the right end of the rotating shaft. A transmission belt is meshed inside the drive wheel, and a driven wheel is meshed inside the transmission belt. A connecting shaft is fixedly mounted inside the driven wheel. The connecting shaft is rotatably mounted inside the fixed plate on the front side. Worm sleeves are fixedly mounted on the surfaces of both the rotating shaft and the connecting shaft. A worm wheel is meshed inside the worm sleeve and is fixedly mounted on the surface of an internally threaded pipe.
[0008] Preferably, the limiting component includes a limiting groove formed on the surface of the stud, a limiting rod overlapping inside the limiting groove, the limiting rod being threaded inside the internally threaded tube, and a knob being fixedly provided at the end of the limiting rod.
[0009] Preferably, the buffer assembly includes a buffer cylinder fixedly installed on the top of the base plate, a piston slidably disposed inside the buffer cylinder, a through hole being provided through the top of the piston, a piston rod being fixedly disposed on the top of the piston, the piston rod being fixedly installed on the bottom of the mounting base, a sealing cover being slidably disposed on the surface of the piston rod, and the sealing cover being fixedly installed on the top of the buffer cylinder.
[0010] Preferably, there are several upper and lower magnets, the bottom of the upper magnet is the S pole, the top of the lower magnet is the S pole, and both the upper and lower magnets are rubidium magnets.
[0011] Preferably, the buffer cylinder is filled with damping fluid, and there are several through holes, all of which are opened through the top of the buffer cylinder.
[0012] Preferably, both the rotating shaft and the connecting shaft are circular structures, and both are made of metal.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When the explosion-proof centrifugal fan body vibrates during operation, the mounting base drives the internal threaded pipe downward through the fixing ring and bearing, causing the stud to drive the upper magnet downward. The repulsive force of the lower magnet on the upper magnet cancels out the generated vibration thrust, thereby reducing the vibration of the explosion-proof centrifugal fan body. This avoids the situation where the friction between the impeller shaft and bearing of the explosion-proof centrifugal fan will increase under the influence of vibration, leading to accelerated bearing wear. It also avoids the situation where the generated noise seriously interferes with the work and life of the crew in the closed environment of the ship. Attached Figure Description
[0014] Figure 1 This is an isometric drawing of the structure of this utility model;
[0015] Figure 2 This is a partial structural diagram of the present invention;
[0016] Figure 3 This is a schematic diagram of the internal structure of the internally threaded pipe of this utility model;
[0017] Figure 4 This is a schematic diagram of the buffer component structure of this utility model.
[0018] In the diagram: 1. Mounting base; 2. Explosion-proof centrifugal fan body; 3. Fixing plate; 4. Rotating shaft; 5. Throttle; 6. Connecting shaft; 7. Worm sleeve; 8. Worm wheel; 9. Internal threaded tube; 10. Stud; 11. Upper magnet; 12. Placement base plate; 13. Lower magnet; 14. Driving wheel; 15. Transmission belt; 16. Driven wheel; 17. Fixing ring; 18. Limiting groove; 19. Limiting rod; 20. Knob; 21. Buffer cylinder; 22. Piston; 23. Through hole; 24. Piston rod; 25. Sealing cover. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Reference Figure 1-4A marine explosion-proof centrifugal fan includes a mounting base 1, with the fan body 2 fixedly mounted on the top of the mounting base 1. An adjustment assembly is located at the bottom of the mounting base 1. A fixing ring 17 is fixedly mounted at the bottom of the mounting base 1. An internally threaded tube 9 is mounted inside the fixing ring 17 via a bearing. A stud 10 is threaded inside the internally threaded tube 9. An upper magnet 11 is fixedly mounted at the bottom of the stud 10. A limiting assembly is provided on the surface of the stud 10 for easy positioning. A placement base plate 12 is located below the mounting base 1. A lower magnet 13 is fixedly mounted on the top of the placement base plate 12. There are multiple upper magnets 11 and lower magnets 13. The bottom of the upper magnet 11 is the S pole, and the top of the lower magnet 13 is the S pole. Both the upper magnet 11 and lower magnet 13 are neodymium magnets. The adjustment... The assembly includes a fixed plate 3 fixedly mounted on the bottom of the mounting base 1. A rotating shaft 4 is rotatably mounted inside the fixed plate 3. A handle 5 is fixedly mounted on the left end of the rotating shaft 4, and a drive wheel 14 is fixedly mounted on the right end of the rotating shaft 4. A transmission belt 15 is meshed inside the drive wheel 14, and a driven wheel 16 is meshed inside the transmission belt 15. A connecting shaft 6 is fixedly mounted inside the driven wheel 16. The connecting shaft 6 is rotatably mounted inside the front fixed plate 3. Worm sleeves 7 are fixedly mounted on the surfaces of both the rotating shaft 4 and the connecting shaft 6. A worm wheel 8 is meshed inside the worm sleeves 7. Both the rotating shaft 4 and the connecting shaft 6 are circular structures and are made of metal. The metal material of the rotating shaft 4 and the connecting shaft 6 makes them less prone to bending, thus preventing bending of the rotating shaft 4 and the connecting shaft 6. A misalignment occurs between the worm sleeve 7 and the worm wheel 8. The worm wheel 8 is fixedly installed on the surface of the internally threaded tube 9. The limiting assembly includes a limiting groove 18 formed on the surface of the stud 10. A limiting rod 19 is interlocked inside the limiting groove 18. The limiting rod 19 is threaded inside the internally threaded tube 9. A knob 20 is fixedly installed at the end of the limiting rod 19. Depending on the specifications of the explosion-proof centrifugal fan body 2, the throttle 5 drives the rotating shaft 4 to rotate. The rotating shaft 4 drives the driving wheel 14 to rotate. The driving wheel 14 drives the driven wheel 16 to rotate via the transmission belt 15. The driven wheel 16 drives the connecting shaft 6 to rotate. This causes the rotating shaft 4 and the connecting shaft 6 to simultaneously drive the worm sleeve 7 to rotate. The worm sleeve 7 then drives the worm wheel 8, which is meshed with it, to rotate. The worm wheel 8 drives the internally threaded tube 9 through... The bearing rotates inside the fixed ring 17, causing the stud 10 to move the upper magnet 11. During the movement of the stud 10, the limiting rod 19 slides relative to the limiting groove 18, limiting the stud 10. For a heavier explosion-proof centrifugal fan body 2, the upper magnet 11 moves downward, shortening the distance between the upper magnet 11 and the lower magnet 13, increasing the magnetic field force, which can better counteract the weight of the explosion-proof centrifugal fan body 2 and suppress low-frequency vibrations caused by weight. For a lighter explosion-proof centrifugal fan body 2, the distance between the upper magnet 11 and the base plate 12 can be increased. Therefore, by adjusting the distance between the upper magnet 11 and the lower magnet 13 according to different models and specifications of explosion-proof centrifugal fan bodies 2, the magnetic field strength and distribution can be changed.This precisely matches the load of the explosion-proof centrifugal fan body 2, ensuring that the upper magnet 11 and lower magnet 13 provide just the right amount of support and shock absorption. A buffer assembly is installed between the top of the base plate 12 and the bottom of the mounting base 1. When the explosion-proof centrifugal fan body 2 vibrates during operation, the mounting base 1, through the fixing ring 17 and bearings, moves the internal threaded tube 9 downwards, causing the stud 10 to move the upper magnet 11 downwards. The repulsive force of the lower magnet 13 against the upper magnet 11 counteracts the generated vibration thrust, thus reducing vibration in the explosion-proof centrifugal fan body 2. This prevents increased friction between the impeller shaft and bearings due to vibration, which would lead to accelerated bearing wear and avoid serious noise interference with the crew's work and life in the enclosed environment of the ship.
[0021] Specifically, the buffer assembly includes a buffer cylinder 21 fixedly installed on the top of the base plate 12. A piston 22 is slidably disposed inside the buffer cylinder 21. A through hole 23 is provided through the top of the piston 22. The buffer cylinder 21 is filled with damping fluid. There are several through holes 23, all of which are opened through the top of the buffer cylinder 21. A piston rod 24 is fixedly disposed on the top of the piston 22 and is fixedly installed on the bottom of the mounting base 1. A sealing cover 25 is slidably disposed on the surface of the piston rod 24 and is fixedly installed on the top of the buffer cylinder 21. When the mounting base 1 moves, it will drive the piston rod 24 to move, and the piston rod 24 will drive the through hole 23 to move inside the buffer cylinder 21, so that the damping fluid in the buffer cylinder 21 enters the top of the piston 22 through the through hole 23 or enters the bottom of the piston 22 through the through hole 23, thereby buffering the mounting base 1 and preventing the mounting base 1 from shaking during the shock absorption process.
[0022] In use: When the explosion-proof centrifugal fan body 2 vibrates during operation, the explosion-proof centrifugal fan body 2 drives the mounting base 1 to move downward, which in turn drives the fixing ring 17 to move downward. The fixing ring 17 drives the internal threaded tube 9 to move downward through the bearing, which in turn drives the stud 10 to move downward. The stud 10 then drives the upper magnet 11 to move downward. Since both the upper magnet 11 and the lower magnet 13 face the S pole, based on the principle of like poles repulsion, when the upper magnet 11 approaches the lower magnet 13, it will be repelled by the lower magnet 13. This causes the lower magnet 13 to exert an upward thrust on the upper magnet 11. The closer the upper magnet 11 is to the lower magnet 13, the greater the thrust it receives. The repulsive force of the lower magnet 13 on the upper magnet 11 cancels out the vibration thrust generated, thereby reducing the vibration of the explosion-proof centrifugal fan body 2.
[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover 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 process, method, article, or apparatus.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A marine explosion-proof centrifugal fan, comprising a mounting base (1), characterized in that, An explosion-proof centrifugal fan body (2) is fixedly installed on the top of the mounting base (1). An adjustment component is installed at the bottom of the mounting base (1). A fixing ring (17) is fixedly installed at the bottom of the mounting base (1). An internal threaded tube (9) is installed inside the fixing ring (17) through a bearing. A stud (10) is threaded inside the internal threaded tube (9). An upper magnet (11) is fixedly installed at the bottom of the stud (10). A limiting component is provided on the surface of the stud (10) to facilitate its positioning. A placement base plate (12) is provided below the mounting base (1). A lower magnet (13) is fixedly installed on the top of the placement base plate (12). A buffer component is provided between the top of the placement base plate (12) and the bottom of the mounting base (1).
2. The marine explosion-proof centrifugal fan according to claim 1, characterized in that, The adjustment assembly includes a fixed plate (3) fixedly installed at the bottom of the mounting base (1). A rotating shaft (4) is rotatably installed inside the fixed plate (3). A throttle (5) is fixedly installed at the left end of the rotating shaft (4). A drive wheel (14) is fixedly installed at the right end of the rotating shaft (4). A transmission belt (15) is meshed inside the drive wheel (14). A driven wheel (16) is meshed inside the transmission belt (15). A connecting shaft (6) is fixed inside the driven wheel (16). The connecting shaft (6) is rotatably installed inside the fixed plate (3) on the front side. A worm sleeve (7) is fixedly installed on the surface of both the rotating shaft (4) and the connecting shaft (6). A worm wheel (8) is meshed inside the worm sleeve (7). The worm wheel (8) is fixedly installed on the surface of the internally threaded pipe (9).
3. A marine explosion-proof centrifugal fan according to claim 1, characterized in that, The limiting component includes a limiting groove (18) formed on the surface of the stud (10), a limiting rod (19) is provided inside the limiting groove (18), the limiting rod (19) is threaded inside the internal threaded tube (9), and a knob (20) is fixedly provided at the end of the limiting rod (19).
4. A marine explosion-proof centrifugal fan according to claim 1, characterized in that, The buffer assembly includes a buffer cylinder (21) fixedly installed on the top of the base plate (12). A piston (22) is slidably arranged inside the buffer cylinder (21). A through hole (23) is provided through the top of the piston (22). A piston rod (24) is fixedly arranged on the top of the piston (22). The piston rod (24) is fixedly installed on the bottom of the mounting base (1). A sealing cover (25) is slidably arranged on the surface of the piston rod (24). The sealing cover (25) is fixedly installed on the top of the buffer cylinder (21).
5. A marine explosion-proof centrifugal fan according to claim 1, characterized in that, The number of the upper magnet (11) and the lower magnet (13) is several. The bottom of the upper magnet (11) is the S pole and the top of the lower magnet (13) is the S pole. Both the upper magnet (11) and the lower magnet (13) are rubidium magnets.
6. A marine explosion-proof centrifugal fan according to claim 4, characterized in that, The buffer cylinder (21) is filled with damping fluid, and there are several through holes (23), all of which are opened through the top of the buffer cylinder (21).
7. A marine explosion-proof centrifugal fan according to claim 2, characterized in that, Both the rotating shaft (4) and the connecting shaft (6) are circular structures, and both are made of metal.