A centrifugal fan

Abstract

The application discloses a centrifugal ventilator, which comprises a main body structure and a ventilation structure, and the ventilation structure is detachably arranged in the main body structure, and relates to the technical field of ventilators. The main body structure can be used for adjusting the position of an air outlet, i.e. the position and orientation of an air outlet pipe, so as to facilitate the connection with other devices. The ventilation structure can be used for adjusting the inclination angle of a fan blade plate to generate wind force, and the size of the device and the number of the fan blade plates can be adjusted according to different uses. The whole is simple to assemble, easy to disassemble and maintain, and the fan blade plates can be adjusted and installed. The position and orientation of the air outlet pipe can be adjusted according to actual conditions, and the practicality of actual installation is improved.

Description

Technical Field

[0001] This invention relates to the field of fan technology, specifically a centrifugal fan. Background Technology

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas; they are a type of driven fluid machinery. Centrifugal fans are widely used in ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; ventilation and induced draft in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; grain drying and conveying; wind tunnel air sources; and inflation and propulsion of hovercraft, etc.

[0003] However, the blades on the impellers of current centrifugal fans are mostly fixed and welded, and the overall casing and air outlet are fixed and inconvenient to adjust; therefore, a centrifugal fan is designed. Summary of the Invention

[0004] The purpose of this invention is to provide a centrifugal fan to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a centrifugal fan, comprising a main structure and a ventilation structure, wherein the ventilation structure is detachably installed within the main structure.

[0006] Preferably, the main structure includes a base, a first outer shell, a second outer shell, a bearing, two pairs of first screws, a sleeve plate, two pairs of clamping bolts, an air outlet pipe, several first mounting bolts, and a motor;

[0007] The base has an H-shaped structure. The first outer shell is a cylindrical structure with a first clamping groove on its left circumference. Two pairs of first through holes are equidistantly opened on the left side wall of the first outer shell, located inside the first clamping groove. The first outer shell is fixedly mounted on the upper wall of the base, located at the center. Two pairs of threaded holes, each connected to the first clamping groove, are equidistantly opened on the outer side wall of the first outer shell. The second outer shell has a circular structure with a second clamping groove on its left side wall, corresponding to the first clamping groove. The left side wall of the second clamping groove has first threaded holes corresponding to the first through holes. The second outer shell is detachably mounted on the first outer shell, with the second clamping groove corresponding to the first clamping groove. The bearing is fixedly inserted through the middle of the second outer shell. One end of each of the two pairs of first screws extends movably from the first through hole of the first outer shell and is screwed into the first threaded hole of the second outer shell. Inside, the sleeve plate has a semi-circular structure, with corresponding protrusions at the center of both ends. The two sides of the sleeve plate are movably inserted into the first and second clamping slots, respectively, and the front and rear sides of the protrusions are respectively attached to the first and second outer shells. Two pairs of clamping bolts are respectively screwed into the tightening threaded holes and are respectively attached to the sleeve plate. The air outlet pipe has a rectangular tube structure, with a first flange on the upper and lower side walls near one end and a second flange on the upper and lower side walls of the other end. One end of the air outlet pipe is detachably connected to both ends of the sleeve plate and is attached to the sleeve plate, the first outer shell, and the second outer shell. One end of several first mounting bolts is movably inserted through the first flange at one end of the air outlet pipe, and the other end is movably screwed into the protrusions of the sleeve plate. The motor is fixedly installed on the left side wall inside the first outer shell, located at the center, and the drive end is located inside the sleeve plate.

[0008] Preferably, the ventilation structure includes a frame assembly and a blade assembly, wherein the blade assembly is movably mounted on the frame assembly.

[0009] Preferably, the frame assembly includes a frame plate, a frame tray, two pairs of second screws, and two pairs of first nuts;

[0010] The frame plate has a circular structure and several second through holes are equidistantly opened near the outer side wall. A sleeve hole is opened at the center of the frame plate, and two pairs of third through holes are opened outside the sleeve hole. The upper and lower side walls of the frame plate have fixing grooves that communicate with the right side wall. Several mounting threaded holes are equidistantly opened in the lower wall of the fixing groove. The frame plate is fixedly mounted on the motor drive end and is located below the sleeve plate. The frame plate has a frustum-shaped cavity structure. One end of the frame plate is fixedly inserted into the bearing, and the other end is opposite to the frame plate. Several shaft holes corresponding to the second through holes are equidistantly opened on the right side wall of the frame plate. One end of each of the two pairs of second screws is movably inserted through the third through hole of the frame plate, and the other end is movably screwed into the right side wall of the other end of the frame plate. Two pairs of first nuts are movably screwed into one end of each of the second screws and are located on the right side of the frame plate.

[0011] Preferably, the blade assembly includes several shafts, several second nuts, several baffles, several gears, several third nuts, several fan blades, and a gear ring;

[0012] Several shafts have one end movably passing through the second through hole of the frame plate, and the other end movably inserted into the shaft hole of the frame plate. Several second nuts are movably screwed onto one end of the shaft and fit against the side wall of the frame plate. Several baffles are detachably fitted onto one end of the shaft and fit against the right side of the second nut. Several gears are detachably fitted onto the other end of the shaft and located to the right of the baffle. Several third nuts are movably screwed onto the other end of the shaft and located to the right of the gear. Several fan blades have one end detachably fitted onto the other end of the shaft and located between the frame plate and the frame plate, and outside the second screw. The other end of several fan blades is an arc-shaped structure. The inner and outer walls of the toothed ring are equidistantly provided with teeth. The toothed ring is movably fitted onto the gear and located between the baffle and the first outer shell, and the toothed ring is located inside the sleeve plate.

[0013] Preferably, a pair of limiting units are also installed on the frame plate, and the pair of limiting units are respectively fixedly disposed in the fixing groove;

[0014] The limiting unit consists of a toothed rod and a pair of adjusting bolts. One end of the toothed rod is detachably installed in the fixing groove through the pair of adjusting bolts, and the adjusting bolts are movably screwed into the mounting threaded hole. The other end of the toothed rod meshes with the teeth on the outer wall of the toothed ring.

[0015] Preferably, the diameter of the outer side wall of the toothed ring is the same as the diameter of the frame plate, and the diameter of the frame plate is larger than the diameter of the inner side wall of the first outer shell.

[0016] Preferably, the sleeve is rotatable between the first outer shell and the second outer shell.

[0017] The centrifugal fan proposed in this invention has the following advantages:

[0018] 1. The present invention allows for easy adjustment of the position of the air outlet, i.e. the position and orientation of the air outlet duct, through the main structure, facilitating its connection with other equipment;

[0019] 2. The present invention allows for adjustment of the tilt angle of the fan blades that generate wind force through the ventilation structure, thereby assisting in adjusting the magnitude of the delivered wind force. Furthermore, it eliminates the need for welding installation and allows for adjustment of the equipment size and the number of fan blades installed according to different applications.

[0020] 3. The present invention is simple to assemble, easy to disassemble and maintain, and convenient to adjust and install the fan blades. It also allows for adjustment of the position and orientation of the air outlet duct to suit actual conditions, thereby improving the practicality of actual installation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the assembly structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the first mounting structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the second mounting structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the first split structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the second split structure of the present invention;

[0026] Figure 6 This is a partially enlarged structural diagram of point A in the present invention;

[0027] Figure 7 This is a partially enlarged structural diagram of section B of the present invention.

[0028] In the diagram: 1. Main structure; 10. Base; 11. First outer shell; 12. Second outer shell; 13. Bearing; 14. First screw; 15. Sleeve plate; 16. Clamping bolt; 17. Air outlet pipe; 18. First mounting bolt; 19. Motor; 2. Ventilation structure; 21. Frame plate; 22. Frame tray; 23. Second screw; 24. First nut; 31. Shaft; 32. Second nut; 33. Baffle plate; 34. Gear; 35. Third nut; 36. Fan blade; 37. Gear ring; 4. Limiting unit; 41. Gear rod; 42. Adjusting bolt. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1-7 The present invention provides a technical solution: a centrifugal fan, comprising a main structure 1 and a ventilation structure 2, wherein the ventilation structure 2 is detachably installed within the main structure 1.

[0031] The following are the model numbers and functions of the electrical components in this case:

[0032] Motor: This is existing technology, and any motor suitable for this solution can be used.

[0033] As a preferred embodiment, the main structure 1 further includes a base 10, a first outer shell 11, a second outer shell 12, a bearing 13, two pairs of first screws 14, a sleeve plate 15, two pairs of clamping bolts 16, an air outlet pipe 17, several first mounting bolts 18, and a motor 19.

[0034] The base 10 has an H-shaped structure, the first outer shell 11 has a cylindrical structure, and a first clamping groove is provided on the circumference of the left side wall. Two pairs of first through holes are equidistantly opened on the left side wall of the first outer shell 11, located inside the first clamping groove. The first outer shell 11 is fixedly mounted on the upper wall of the base 10, located at the center. Two pairs of threaded holes, respectively connected to the first clamping groove, are equidistantly opened on the outer side wall of the first outer shell 11. The second outer shell 12 has a circular structure, and a second clamping groove corresponding to the first clamping groove is opened on the left side wall of the second clamping groove. First threaded holes, respectively corresponding to the first through holes, are opened on the left side wall of the second clamping groove. The second outer shell 12 is detachably mounted on the first outer shell 11, and the second clamping groove corresponds to the first clamping groove. A bearing 13 is fixedly inserted through the middle of the second outer shell 12. One end of each of the two pairs of first screws 14 extends movably from the first through hole of the first outer shell 11 and is screwed into the first threaded hole of the second outer shell 12. (The last sentence appears to be incomplete and possibly refers to a different type of shell.) 5 is a semi-circular structure with corresponding protrusions at the center of both ends. The two sides of the sleeve plate 15 are movably inserted into the first clamping groove and the second clamping groove, respectively. The front and rear sides of the protrusions are respectively attached to the first outer shell 11 and the second outer shell. Two pairs of clamping bolts 16 are respectively screwed into the tightening threaded holes and are respectively attached to the sleeve plate 15. The air outlet pipe 17 is a rectangular tube structure with a first flange on the upper and lower side walls near one end and a second flange on the upper and lower side walls of the other end. One end of the air outlet pipe 17 is detachably connected to both ends of the sleeve plate 15 and is attached to the sleeve plate 15, the first outer shell 11 and the second outer shell 12. One end of several first mounting bolts 18 is movably inserted into the first flange at one end of the air outlet pipe 17, and the other end is movably screwed into the protrusions of the sleeve plate 15. The motor 19 is fixedly installed on the left side wall inside the first outer shell 11 and is located at the center. The drive end is located inside the sleeve plate 15.

[0035] As a preferred option, the further ventilation structure 2 includes a frame assembly and a blade assembly, with the blade assembly movably mounted on the frame assembly.

[0036] As a preferred embodiment, the further assembly includes a frame plate 21, a frame tray 22, two pairs of second screws 23 and two pairs of first nuts 24;

[0037] The frame plate 21 has a circular structure and several second through holes are equidistantly opened near the outer side wall. A sleeve hole is opened at the center of the frame plate 21, and two pairs of third through holes are opened outside the sleeve hole. The upper and lower side walls of the frame plate 21 have fixing grooves that communicate with the right side wall. Several mounting threaded holes are equidistantly opened in the lower wall of the fixing groove. The frame plate 21 is fixedly mounted on the drive end of the motor 19 and is located below the sleeve plate 15. The frame plate 22 has a frustum-shaped cavity structure. One end of the frame plate 22 is fixedly inserted into the bearing 13, and the other end is opposite to the frame plate 21. Several shaft holes corresponding to the second through holes are equidistantly opened on the right side wall of the frame plate 22. One end of each of the two pairs of second screws 23 is movably inserted through the third through hole of the frame plate 21, and the other end is movably screwed into the right side wall of the other end of the frame plate 22. Two pairs of first nuts 24 are movably screwed into one end of each of the second screws 23 and are located on the right side of the frame plate 21.

[0038] As a preferred embodiment, the blade assembly further includes several shafts 31, several second nuts 32, several baffles 33, several gears 34, several third nuts 35, several fan blades 36, and a gear ring 37.

[0039] Several shafts 31 have one end movably passing through the second through hole of the frame plate 21, and the other end movably inserted into the shaft hole of the frame plate 22. Several second nuts 32 are movably screwed onto one end of the shaft 31 and fit against the side wall of the frame plate 21. Several baffles 33 are detachably fitted onto one end of the shaft 31 and fit against the right side of the second nut 32. Several gears 34 are detachably fitted onto the other end of the shaft 31 and located to the right of the baffle 33. Several third nuts 35 are movably screwed onto the other end of the shaft 31 and located to the right of the gear 34. Several fan blades 36 have one end detachably fitted onto the other end of the shaft 31 and located between the frame plate 21 and the frame plate 22, and located outside the second screw 23. The inner and outer walls of the toothed ring 37 are provided with teeth at equal intervals. The toothed ring 37 is movably fitted onto the gear 34 and located between the baffle 33 and the first outer shell 11, and the toothed ring 37 is located inside the sleeve plate 15.

[0040] As a preferred option, a pair of limiting units 4 are further installed on the shelf 21, and the pair of limiting units 4 are respectively fixedly installed in the fixing groove;

[0041] The limiting unit 4 consists of a rack 41 and a pair of adjusting bolts 42. One end of the rack 41 is detachably installed in the fixing groove through the pair of adjusting bolts 42, and the adjusting bolts 42 are movably screwed into the mounting threaded hole. The other end of the rack 41 meshes with the teeth on the outer side wall of the toothed ring 37.

[0042] As a preferred embodiment, the outer wall diameter of the toothed ring 37 is the same as the diameter of the frame plate 21, and the diameter of the frame plate 21 is larger than the inner wall diameter of the first outer shell 11.

[0043] As a preferred embodiment, the further sleeve 15 is rotatable between the first housing 11 and the second housing 12.

[0044] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0045] Example: According to the appendix of the instruction manual Figure 1-7 It can be seen that, firstly, the equipment can be fixedly installed through the base 10 in the main structure 1; according to the usage requirements, the air outlet pipe 17 can be disassembled first, and the frame plate 21 or frame tray 22 can be held by hand to prevent it from rotating; then, through the opening of the sleeve plate 15, the gear ring 37 in the ventilation structure 2 can be rotated by force; the gear ring 37 drives multiple gears 34 to rotate on the frame plate 21 through the shaft 31 with the help of the third nut 35; and the gear ring 37 rotates through the limit between the baffle 33 and the first outer shell 11 and cannot disengage from the gears 34.

[0046] Then, the shaft 31, which is limited on the frame plate 21 by the second nut 32, drives the fan blade 36 to rotate between the frame plate 21 and the frame plate 22 at a certain angle to adjust the amount of wind force delivered under a certain voltage condition. After adjustment, the frame plate 21 and the frame plate 22 are rotated together so that the limiting unit 4 corresponds to the opening of the sleeve plate 15. The toothed rod 41 can then be installed by adjusting the bolt 42. The toothed rod 41 contacts and engages with the toothed ring 37 to limit and fix the toothed ring 37, preventing the rotating fan blade 36 from being forced to rotate the shaft 31 and the gear 34, thus affecting the tilt angle of the fan blade 36.

[0047] Finally, by applying force through the protrusions on the sleeve plate 15, the sleeve plate 15 is rotated between the corresponding first outer shell 11 and second outer shell 12 connected by the first screw 14. After adjusting the opening of the sleeve plate 15 and adjusting the position and orientation of the air outlet pipe 17, the clamping bolt 16 is tightened to limit the sleeve plate 15. The air outlet pipe 17 can then be connected to both ends of the sleeve plate 15 by the first mounting bolt 18, and fitted and fixed with the corresponding openings of the first outer shell 11 and the second outer shell 12. After the equipment is adjusted, the motor 19 can be powered on to drive the electric frame plate 21 to rotate under force. Through the connection of the second screw 23, the frame plate 22 is driven to rotate through the bearing 13 in the second outer shell 12, so that air enters through the frame plate 22 and is blown out through the air outlet pipe 17.

[0048] In this case, the other end of the fan blade 36 is designed in an arc shape for strong air delivery in a single direction; it can also be designed as a flat structure, and then, in the same way as above, the tilt direction of the fan blade 36 can be rotated to change the driving direction of the motor 19 and the sleeve 15 to change the delivery direction and position.

[0049] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrifugal fan, characterized in that: It includes a main structure (1) and a ventilation structure (2), wherein the ventilation structure (2) is detachably installed inside the main structure (1). The main structure (1) includes a base (10), a first outer shell (11), a second outer shell (12), a bearing (13), two pairs of first screws (14), a sleeve plate (15), two pairs of clamping bolts (16), an air outlet pipe (17), several first mounting bolts (18), and a motor (19). The base (10) has an H-shaped structure, the first outer shell (11) has a cylindrical structure, and a first clamping groove is provided on the circumference of the left side wall. Two pairs of first through holes are equidistantly opened on the left side wall of the first outer shell (11) and are located inside the first clamping groove. The first outer shell (11) is fixedly installed on the upper wall of the base (10) and is located at the center. Two pairs of threaded holes are equidistantly opened on the outer side wall of the first outer shell (11) and are respectively connected to the first clamping groove for tightening. The second outer shell (12) has a circular structure, and the left side wall has the same type of groove as the first clamping groove. The corresponding second clamping groove, and the left side wall of the second clamping groove is provided with a first threaded hole corresponding to the first through hole respectively. The second outer shell (12) is detachably mounted on the first outer shell (11), and the second clamping groove corresponds to the first clamping groove. The bearing (13) is fixedly inserted through the middle of the second outer shell (12). One end of each of the two pairs of first screws (14) is movably inserted out of the first through hole of the first outer shell (11), and is screwed into the first threaded hole of the second outer shell (12) respectively. The sleeve plate (15) has a semi-circular structure, and the middle of both ends is... Each is provided with a corresponding protrusion. The two sides of the sleeve plate (15) are respectively movably inserted into the first clamping groove and the second clamping groove, and the front and rear sides of the protrusion are respectively attached to the first outer shell (11) and the second outer shell. The two pairs of clamping bolts (16) are respectively screwed into the tightening threaded holes and are respectively attached to the sleeve plate (15). The air outlet pipe (17) is a rectangular tube structure, and a first flange is provided on the upper and lower side walls near one end, and a second flange is provided on the upper and lower side walls of the other end. One end of the air outlet pipe (17) is detachably connected to the sleeve plate (15). The first mounting bolts (18) are mounted on both ends and are attached to the sleeve plate (15), the first outer shell (11), and the second outer shell (12). One end of each of the first mounting bolts (18) is movably inserted into the first flange at one end of the air outlet pipe (17), and the other end is movably screwed into the protrusion of the sleeve plate (15). The motor (19) is fixedly mounted on the left side wall inside the first outer shell (11) and located at the center, and the drive end is located inside the sleeve plate (15). The ventilation structure (2) includes a frame assembly and a blade assembly, and the blade assembly is movably mounted on the frame assembly.

2. A centrifugal fan according to claim 1, characterized in that: The frame assembly includes a frame plate (21), a frame tray (22), two pairs of second screws (23) and two pairs of first nuts (24); The frame plate (21) has a circular structure and several second through holes are equidistantly provided near the outer side wall. A sleeve hole is provided at the center of the frame plate (21), and two pairs of third through holes are provided outside the sleeve hole. The upper and lower side walls of the frame plate (21) are provided with fixing grooves that communicate with the right side wall. Several mounting threaded holes are equidistantly provided in the lower wall of the fixing groove. The frame plate (21) is fixedly mounted on the drive end of the motor (19) and is located below the sleeve plate (15). The frame plate (22) has a frustum-shaped cavity structure. One end of the frame (22) is fixedly inserted into the bearing (13), and the other end is opposite to the frame plate (21). The right side wall of the frame (22) is provided with a number of shaft holes that correspond to the second through holes. One end of each of the two pairs of second screws (23) is movably inserted into the third through hole of the frame plate (21), and the other end is movably screwed into the right side wall of the other end of the frame (22). The two pairs of first nuts (24) are movably screwed into one end of the second screw (23) and located on the right side of the frame plate (21).

3. A centrifugal fan according to claim 2, characterized in that: The blade assembly includes several shafts (31), several second nuts (32), several baffles (33), several gears (34), several third nuts (35), several fan blades (36), and a gear ring (37); One end of each of the aforementioned shafts (31) is movably inserted through the second through hole of the frame plate (21), and the other end is movably inserted into the shaft hole of the frame plate (22). A number of second nuts (32) are movably screwed onto one end of each shaft (31) and fit against the side wall of the frame plate (21). A number of baffles (33) are detachably fitted onto one end of each shaft (31) and fit against the right side of the second nut (32). A number of gears (34) are detachably fitted onto the other end of each shaft (31) and located to the right of the baffle (33). A number of third... Nuts (35) are movably screwed onto the other end of shaft (31) and located to the right of gear (34). One end of each of the fan blades (36) is detachably fitted onto the other end of shaft (31) and located between frame plate (21) and frame disc (22), and located outside the second screw (23). The inner and outer walls of the toothed ring (37) are provided with teeth at equal intervals. The toothed ring (37) is movably fitted onto gear (34) and located between baffle (33) and first outer shell (11), and the toothed ring (37) is located inside sleeve plate (15).

4. A centrifugal fan according to claim 3, characterized in that: A pair of limiting units (4) are also installed on the frame plate (21), and the pair of limiting units (4) are respectively fixedly installed in the fixing groove; The limiting unit (4) consists of a toothed rod (41) and a pair of adjusting bolts (42). One end of the toothed rod (41) is detachably installed in the fixing groove through the pair of adjusting bolts (42), and the adjusting bolts (42) are movably screwed into the mounting threaded hole. The other end of the toothed rod (41) meshes with the teeth on the outer side wall of the toothed ring (37).

5. A centrifugal fan according to claim 4, characterized in that: The outer wall diameter of the toothed ring (37) is the same as the diameter of the frame plate (21), and the diameter of the frame plate (21) is greater than the inner wall diameter of the first outer shell (11).

6. A centrifugal fan according to claim 5, characterized in that: The sleeve (15) is rotatable between the first outer shell (11) and the second outer shell (12).

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