Fan impeller structure capable of being modularly adjusted and assembled

Abstract

The invention relates to the technical field of fan impellers, in particular to a fan impeller structure capable of being modularly adjusted and assembled, which comprises a lower hub, an upper hub and a blade structure, the blade structure is arranged between the upper hub and the lower hub, the inner side of the upper hub is fixedly connected with an inner connecting frame, and the bottom of the inner connecting frame is fixedly connected with the lower hub. The fan impeller structure capable of being modularly adjusted and assembled is provided with the blade structure and can be quickly assembled and disassembled through the auxiliary pins and the pre-inserting grooves, the whole impeller does not need to be replaced when a single blade is damaged, the maintenance cost is reduced, the fan impeller structure can adapt to different working conditions without shutdown, the blade angle can be adjusted without shutdown, and the fan impeller structure is convenient to assemble and disassemble. The blades can be flexibly assembled, disassembled and replaced according to needs, the total number of the blades is adjusted, the operation flexibility of the fan is improved, the rigid blades are formed by splicing multiple sections, units with different curvatures can be replaced according to needs, the blade radian can be customized, and the fan is adaptive to various scenes such as high pressure and large flow.

Description

Technical Field

[0001] The present invention relates to the technical field of fan impellers, and in particular to a fan impeller structure capable of modular adjustment and assembly. Background Art

[0002] As we all know, when wind blows through the impeller, the blades rotate under the action of the wind. The design of the blades enables the wind to drive the impeller to rotate, and its rotational kinetic energy is then transmitted to the fan's transmission system. In this process, the impeller converts wind energy into mechanical energy. When the motor drives the impeller to rotate at high speed, the airflow enters the impeller, is thrown to the edge of the impeller by the centrifugal force, and is discharged from the outlet. The impeller does work on the gas, increasing its kinetic energy and pressure energy.

[0003] The problems with the existing technology are: the existing fan impeller structure is mostly made of die casting or press forging, especially for larger-sized centrifugal fans, which mostly use forward impellers made by welding a hub and multiple blades. However, such large fan equipment has a certain degree of risk of blade deformation or damage due to impact from impurities during use, and replacing the entire impeller is not only troublesome but also costly. At the same time, since the fan impeller in the existing technology is mostly installed inside the fan after the hub and blades are integrated, when the blades need to enhance the propulsion effect on the airflow, the only option is to replace the equipment or shut down the machine to replace an impeller with a larger blade angle, while it is difficult to directly adjust the fan impeller.

[0004] Based on the above-mentioned problems, we found that the fan impellers and even fans in the existing technology are difficult to solve the above problems. Therefore, we proposed a fan impeller structure that can flexibly load and unload and replace blades as needed while adjusting the total number of blades, and can customize the blade shape according to needs. At the same time, it can realize modular adjustment and assembly of the fan blade inclination angle without stopping the machine. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the present invention provides a fan impeller structure that can be modularly adjusted and assembled, which has the characteristics of flexible loading and unloading and replacing blades as needed while adjusting the total number of blades, and the blade shape can be customized according to needs. At the same time, the advantage of the fan blade inclination angle can be achieved without stopping the machine.

[0007] (2) Technical solution

[0008] The above technical objectives of the present invention are achieved through the following technical solutions: a fan impeller structure that can be modularly adjusted and assembled, comprising a lower hub, an upper hub and a blade structure, wherein the blade structure is arranged between the upper hub and the lower hub, an inner frame is fixedly connected to the inner side of the upper hub, and the bottom of the inner frame is fixedly connected to the lower hub;

[0009] The blade structure includes a rigid frame, a middle sleeve is fixedly connected to a side of the rigid frame close to the inner frame, auxiliary pins are fixedly connected to the top and bottom of the rigid frame, a rigid support is provided on the inner side of the rigid frame, a wrapping sleeve is fixedly connected to a side of the rigid support away from the inner frame, and a rigid sheet is inserted into the inner side of the wrapping sleeve;

[0010] The inner side of the lower hub is slidably connected with a slip ring, and the top of the slip ring is fixedly connected with several adjustment sleeves, the top of the adjustment sleeve is movably connected to the middle sleeve, the top of the adjustment sleeve is provided with a driven ring, the bottom of the driven ring is movably connected to the middle sleeve, and the bottom of the driven ring is movably connected to the middle sleeve. The bottom of the driven ring is movably connected with a through pin, the outer side of the through pin passes through the middle sleeve and is plugged into the adjustment sleeve, the bottom of the upper hub and the top of the lower hub are both fixedly connected with pre-insertion disks, the bottom of the top pre-insertion disk and the top of the bottom pre-insertion disk are both provided with pre-slots, and the auxiliary pin is movably connected to the inner side of the pre-slot.

[0011] The above technical solution is adopted, and the blade structure is supported and installed by setting an upper hub to cooperate with the lower hub. The internal frame is used to connect the upper hub and the lower hub. The blade structure itself is divided into a wrapping sleeve and a rigid sheet, and the rigid sheet is assembled from three units. Units of different shapes can be selected for assembly as needed to adjust the curvature and radian of a single blade. The wrapping sleeve is used to fix its outside and fill the gap to avoid the possibility of airflow leaking through the seam or impurities getting stuck. The rigid frame is used in conjunction with auxiliary pins to connect the blade structure with the upper hub and the lower hub to facilitate limiting during loading and unloading. When the blade structure needs to be loaded and unloaded, the top and bottom auxiliary pins can be slid into the upper hub and the lower hub along the pre-slots on the pre-insertion disk. The through-pin is pressed against the middle sleeve and the adjusting sleeve to prevent the blade structure from being displaced.

[0012] The present invention is further configured as follows: the lower hub includes a main disk, an inner side of the main disk is provided with an axial hole, the bottom of the main disk is fixedly connected to a connecting disk, the top of the connecting disk is fixedly connected to an outer disk, the top of the main disk is fixedly connected to the inner frame, and the slip ring is slidably connected between the main disk and the outer disk.

[0013] By adopting the above technical solution, a connecting plate is provided to connect the main plate and the outer plate, so that space between the main plate and the outer plate can be reserved for connection with the slip ring, and the slip ring can smoothly rotate circumferentially between the main plate and the outer plate.

[0014] The present invention is further configured as follows: the inner side of the driven ring is provided with through holes corresponding to the number of adjustment sleeves, the top of the driven ring is provided with a fastening bolt, the bottom of the fastening bolt passes through the through hole on the inner side of the driven ring and is threadedly connected to the through pin.

[0015] The above technical solution is adopted, by setting a large number of through holes and adjustment sleeves, in order to bypass the need to adjust the number and distribution density of the blade structure. The auxiliary pin may be inserted into the inner side of different pre-slots, and the middle sleeve will also cooperate with different adjustment sleeves, so that the through pin can flexibly select the through hole and adjustment sleeve that needs to be penetrated according to actual conditions. The fastening bolt fixes the through pin at the top of the driven ring to prevent it from slipping. When necessary, the fastening bolt can be removed and the driven ring can be moved up to remove the through pin.

[0016] The present invention is further configured as follows: a sub-frame is fixedly connected to the outer side of the inner frame, a stepper motor is installed on the inner side of the sub-frame, an output end of the stepper motor is fixedly connected to an external gear, the inner side of the driven ring is fixedly connected to an internal gear, the internal gear and the external gear are meshed and connected, and a double-layer frame is provided on the outer side of the sub-frame.

[0017] By adopting the above technical solution, a sub-frame is set up for installing the stepper motor, and the engagement of the internal gear and the external gear is used to drive the driven ring to deflect the angle. The stepper motor can be used to rotate a certain angle through the output shaft to adjust the rotation angle of the external gear as needed. When the driven ring and the internal gear reach the required position, as long as the stator winding of the stepper motor remains energized, the rotor will be fixed in the current position by the electromagnetic force, generating a holding torque to maintain the current required position, thereby fixing the angle of the blade structure.

[0018] The present invention is further configured as follows: a surface of the inner frame is movably connected to a limit clamp, and the top and bottom of the inner gear are both in contact with the limit clamp.

[0019] The above technical solution is adopted, by setting a limit clamp to fix the position of the driven ring under normal conditions by limiting the position of the internal gear, preventing it from moving upward when not affected by external force. When the position of the driven ring needs to be adjusted, the limit clamp can be rotated along the internal frame to unlock it from the internal gear. At this time, the internal gear and the driven ring can be moved synchronously.

[0020] The present invention is further configured as follows: a mounting hole is provided on one side of the rigid frame and the rigid support member that are close to each other, and the rigid frame and the rigid support member are mounted through the mounting hole, bolts and screw sleeves.

[0021] By adopting the above technical solution, by setting loading and unloading holes, the rigid frame and rigid support can be easily loaded and unloaded through bolts and screw sleeves. When only the inner structure of the rigid frame needs to be replaced, there is no need to disassemble the entire blade structure. It is only necessary to remove the rigid support from the inner side of the rigid frame for adjustment and replacement.

[0022] The present invention is further configured as follows: the wrapping sleeve includes a flexible body, the flexible body is made of polyurethane rubber material, the outer side of the flexible body is open, an integrally formed baffle is provided at the opening of the flexible body, the inner side of the baffle and the side of the flexible body in contact with the baffle are both provided with transverse grooves, a side of the flexible body away from the baffle is provided with a plurality of through holes, an external threaded pin is provided on the inner side of the flexible body, the external threaded pin passes through the transverse groove and the through hole on the inner side of the flexible body and is threadedly connected to an end cap, and a raised outer edge is provided on the side of the end cap close to the baffle.

[0023] The above technical solution is adopted, by setting a flexible body for wrapping around the outside of the rigid sheet, and setting an opening and a baffle to cooperate. When the rigid sheet is difficult to insert into the wrapping sleeve, it can be inserted from the opening. The flexible body is attached to the surface of the rigid sheet, and then blocked at the opening by the baffle. The external threaded pin passes through the through hole, the rigid sheet and the transverse groove, and is tightened to the outside of the baffle through the end cap on the outside of the baffle. The raised outer edge is pressed against the outside of the baffle to prevent the structure from loosening, so as to realize the connection between the wrapping sleeve and the rigid sheet.

[0024] The present invention is further configured as follows: the rigid sheet includes a base segment, a shaping segment is installed on a side of the base segment away from the middle sleeve, and an outer end segment is installed on a side of the shaping segment away from the base segment.

[0025] By adopting the above technical solution, a base section is set, which is usually similar in the blades of various types of wind turbine structures, and plays a role in supporting and providing strength. The shaping section and the outer end section can be processed into plates or sheet metal parts with the required curvature or arc surface as needed, and installed to the inner side of the wrapping sleeve after assembly with the base section.

[0026] The present invention is further configured as follows: a positive fitting groove is provided on a side of the shaping section close to the base section and the outer end section, a negative fitting groove is provided on a side of the base section and the outer end section close to the shaping section, and stepped grooves are provided on the base section, the outer end section and the shaping section relative to the positive fitting groove and the negative fitting groove, and the base section, the outer end section and the shaping section are installed by rivet pins passing through the stepped grooves.

[0027] By adopting the above technical solution, by setting positive matching grooves and reverse matching grooves, it is not easy for the shaping section, base section and outer end section to have high unevenness during assembly, so as to avoid affecting the wrapping sleeve and installation or the unevenness after installation affecting the airflow. By setting stepped grooves and matching rivet pins, the base section, outer end section and shaping section can be firmly installed and fixed. When a single-piece base section, outer end section or shaping section is damaged, only the damaged part can be replaced, which can effectively reduce the material and repair and maintenance costs in larger-sized fan structures.

[0028] The present invention is further configured as follows: hollow grooves are provided on the inner sides of the shaping section near the base section and the outer end section, the positions of the hollow grooves on the inner sides of the base section and the outer end section correspond to the transverse grooves on the inner side of the baffle, and the bottom of the upper hub and the top of the lower hub are fixedly connected with limiting rings, and the outer side of the limiting rings fits the pre-inserted disk.

[0029] By adopting the above technical solution, a hollow groove is set up to allow the threaded pin to pass through, which can reduce the deadweight of the blade structure. Since there is a wrapping sleeve on the outside to seal the position of the hollow groove, the impact on the airflow is small. When the deadweight is reduced, the inertia overcome by the fan motor during startup is small, the startup is faster, and the instantaneous current is lower.

[0030] (3) Beneficial effects

[0031] Compared with the prior art, the present invention provides a fan impeller structure that can be modularly adjusted and assembled, which has the following beneficial effects:

[0032] The fan impeller structure that can be modularly adjusted and assembled supports and installs the blade structure by setting an upper hub to cooperate with the lower hub. The internal frame is used to connect the upper hub and the lower hub. The blade structure itself is divided into a wrapping sleeve and a rigid sheet, and the rigid sheet is assembled from three units. Units of different shapes can be selected for assembly as needed to adjust the curvature and radian of a single blade. The wrapping sleeve is used to fix its exterior and fill the gap to avoid the possibility of airflow leaking through the seam or impurities getting stuck. The rigid frame is used in conjunction with auxiliary pins to connect the blade structure with the upper hub and the lower hub to facilitate limiting during loading and unloading. When the blade structure needs to be loaded and unloaded, the top and bottom auxiliary pins can be slid into the upper hub along the pre-slots on the pre-insertion disk. The cam is pressed against the guide ring and the adjusting sleeve is pressed against the guide ring, and the cam is pressed against the guide ring, and the cam is pressed against the adjusting sleeve. The cam is pressed against the guide ring, and the adjusting sleeve is pressed against the guide ring. The cam is pressed against the adjusting sleeve, and the adjusting sleeve is pressed against the guide ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of the structure of the present invention;

[0034] Figure 2 Schematic diagram of the interior of the upper hub and the lower hub in the present invention;

[0035] Figure 3 Schematic diagram of the connection of the driven ring in the present invention;

[0036] Figure 4 Schematic diagram of the structure of the blade in the present invention;

[0037] Figure 5 Schematic diagram of the structure of the wrapping sleeve in the present invention;

[0038] Figure 6 Schematic diagram of the external structure of the flexible body in the present invention;

[0039] Figure 7 Schematic diagram of the structure of the rigid sheet in the present invention;

[0040] Figure 8 Schematic diagram of the disassembly of the rigid sheet in the present invention;

[0041] Figure 9 Schematic diagram of the external structure of the rigid sheet in the present invention;

[0042] Figure 10 Schematic diagram of the disassembly of the through pin in the present invention;

[0043] Figure 11 It is a bottom schematic diagram of the main structure of the present invention.

[0044] In the figure: 1. Lower hub; 101. Main disk; 102. Connecting disk; 103. Outer disk; 2. Blade structure; 201. Rigid frame; 202. Middle sleeve; 203. Auxiliary pin; 204. Rigid support member; 205. Wrapping sleeve; 205a. Flexible body; 205b. Baffle; 205c. External threaded pin; 205d. End cap; 206. Rigid sheet; 206a. Base section; 206b. Shaping section; 206c. Outer end section; 3. Internal frame; 4. Slip ring; 5. Adjusting sleeve; 6. Driven ring; 7. Through pin; 8. Pre-inserted disk; 9. Fastening bolt; 10. Stepper motor; 11. Limit clamp; 12. Upper hub. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] Example 1

[0047] See also Figure 1-11 A modular adjustable fan impeller structure includes a lower hub 1, an upper hub 12, and a blade structure 2. The blade structure 2 is arranged between the upper hub 12 and the lower hub 1. The inner side of the upper hub 12 is fixedly connected to an inner frame 3. The bottom of the inner frame 3 is fixedly connected to the lower hub 1.

[0048] The blade structure 2 includes a rigid frame 201. A middle sleeve 202 is fixedly connected to the side of the rigid frame 201 close to the inner frame 3. Auxiliary pins 203 are fixedly connected to the top and bottom of the rigid frame 201. A rigid support member 204 is provided on the inner side of the rigid frame 201. A wrapping sleeve 205 is fixedly connected to the side of the rigid support member 204 away from the inner frame 3. A rigid sheet 206 is inserted into the inner side of the wrapping sleeve 205.

[0049] The inner side of the lower hub 1 is slidably connected with a slip ring 4, and the top of the slip ring 4 is fixedly connected with a plurality of adjustment sleeves 5. The top of the adjustment sleeve 5 is movably connected to the middle sleeve 202. The top of the adjustment sleeve 5 is provided with a driven ring 6. The bottom of the driven ring 6 is movably connected to the middle sleeve 202. The bottom of the driven ring 6 is movably connected with a through pin 7. The outer side of the through pin 7 passes through the middle sleeve 202 and is plugged into the adjusting sleeve 5. The bottom of the upper hub 12 and the top of the lower hub 1 are both fixedly connected with a pre-insertion disk 8. The bottom of the top pre-insertion disk 8 and the top of the bottom pre-insertion disk 8 are both provided with a pre-slot, and the auxiliary pin 203 is movably connected to the inner side of the pre-slot.

[0050] When the blade structure 2 needs to be installed or removed, the auxiliary pins 203 at the top and bottom can be slid along the pre-slots on the pre-insertion disk 8 into between the upper hub 12 and the lower hub 1 along the pre-slots to initially limit the position, and the middle sleeve 202 is stuck between the adjustment sleeve 5 and the driven ring 6 at the top of the slip ring 4, and then the through pin 7 is used to penetrate the middle sleeve 202 and the adjustment sleeve 5 in sequence to complete the installation and limit of the blade structure 2. Similarly, the removal of the through pin 7 can also quickly slide the single blade structure 2 out of the pre-slot, and the fan is working normally. When the driven ring 6 is rotated, the through pin 7 can apply force to the middle sleeve 202 and the adjustment sleeve 5, so that the adjustment sleeve 5 and the middle sleeve 202 rotate at a certain angle, and the through pin 7 and the middle sleeve 202 rotate relative to each other. When the side of the blade structure 2 close to the through pin 7 follows the displacement of the through pin 7, the auxiliary pin 203 rotates inside the pre-slot of the pre-insertion disk 8 and produces a certain degree of sliding displacement. At this time, the entire blade structure 2 is deflected, so as to adjust the deflection and inclination angle of the blade structure 2 without stopping the fan.

[0051] Among them, the lower hub 1 includes a main disk 101, the inner side of the main disk 101 is provided with an axial hole, the bottom of the main disk 101 is fixedly connected with a connecting disk 102, the top of the connecting disk 102 is fixedly connected with an outer disk 103, the top of the main disk 101 is fixedly connected to the inner frame 3, and the slip ring 4 is slidably connected between the main disk 101 and the outer disk 103. By providing the connecting disk 102 to connect the main disk 101 and the outer disk 103, the space between the main disk 101 and the outer disk 103 can be reserved for connection with the slip ring 4, and the slip ring 4 can smoothly rotate circumferentially between the main disk 101 and the outer disk 103. The inner side of the driven ring 6 is provided with a corresponding adjustment There are a total of 5 through holes in the set, and a fastening bolt 9 is provided on the top of the driven ring 6. The bottom of the fastening bolt 9 passes through the through hole on the inside of the driven ring 6 and is threadedly connected to the through pin 7. By setting a large number of through holes and adjusting sleeves 5, the purpose is to bypass the need to adjust the number and distribution density of the blade structure 2. When the auxiliary pin 203 may be inserted into different pre-slots, the middle sleeve 202 will also cooperate with different adjustment sleeves 5, so that the through pin 7 can flexibly select the through hole and adjustment sleeve 5 that need to be penetrated according to actual conditions. The fastening bolt 9 fixes the through pin 7 at the top of the driven ring 6 to prevent it from slipping. When necessary, the fastening bolt 9 can be tightened. The fixing bolt 9 is removed, and the driven ring 6 is moved up to remove the through pin 7. The outer side of the inner frame 3 is fixedly connected to the sub-frame, and the inner side of the sub-frame is installed with a stepping motor 10. The output end of the stepping motor 10 is fixedly connected to the outer gear, and the inner side of the driven ring 6 is fixedly connected to the inner gear. The inner gear and the outer gear are meshed and connected. A double-layer frame is provided on the outer side of the sub-frame. The sub-frame is provided for installing the stepping motor 10, and the meshing of the inner gear and the outer gear drives the driven ring 6 to deflect the angle. The stepping motor can be used to rotate a certain angle by the output shaft as needed to adjust the rotation angle of the outer gear. When the driven ring 6 and the inner gear reach the required position As long as the stator winding of the stepper motor 10 remains energized, the rotor will be fixed in the current position by the electromagnetic force, generating a holding torque to maintain the current required position, thereby fixing the angle of the blade structure 2. The surface of the inner frame 3 is movably connected with a limit clamp 11, and the top and bottom of the inner gear are in contact with the limit clamp 11. By setting the limit clamp 11, it is used to limit the position of the inner gear to fix the position of the driven ring 6 under normal conditions, preventing it from moving up when it is not affected by external force. When the position of the driven ring 6 needs to be adjusted, the limit clamp 11 can be rotated along the inner frame 3 to unlock it from the inner gear. At this time, the inner gear and the driven ring 6 can be moved synchronously.

[0052] Working principle of this embodiment: When installing the blade structure 2, the auxiliary pins 203 at the top and bottom of the rigid frame 201 are slid into the pre-slots of the pre-insertion disks 8 of the upper and lower hubs 1 to achieve preliminary limiting, so that the middle sleeve 202 is stuck between the adjustment sleeve 5 and the driven ring 6 at the top of the slip ring 4, and then the through pin 7 is passed through the middle sleeve 202 and the adjustment sleeve 5, and the fastening bolt 9 is locked to complete the installation. When disassembling, the reverse operation can be performed. When adjusting the blade angle, first rotate the limit clamp 11 to release the axial limit of the driven ring 6, and the stepping motor 10 on the sub-frame of the internal frame 3 is rotated. The outer gear is engaged with the inner gear of the driven ring 6 to drive it to rotate, driving the through pin 7 to apply force to the centering sleeve 202 and the adjustment sleeve 5 to rotate them, and the auxiliary pin 203 slides in the pre-slot to deflect the blade structure 2. After the stepper motor 10 stops, the electromagnetic force is used to lock the position of the driven ring 6 to fix the blade angle. The slip ring 4 can slide between the main disk 101 and the outer disk 103 to drive the adjustment sleeve 5 to rotate. The pre-slot of the pre-inserted disk 8 provides an installation guide and rotation track for the auxiliary pin 203, and the fastening bolts 9 and the limit clamps 11 ensure the stability of the structure.

[0053] Example 2

[0054] refer to Figure 1-10 A fan impeller structure capable of modular adjustment and assembly further includes a blade structure 2, wherein the blade structure 2 includes a rigid frame 201, a middle sleeve 202 fixedly connected to a side of the rigid frame 201 close to the inner frame 3, an auxiliary pin 203 fixedly connected to the top and bottom of the rigid frame 201, a rigid support member 204 provided on the inner side of the rigid frame 201, a wrapping sleeve 205 fixedly connected to a side of the rigid support member 204 away from the inner frame 3, and a rigid sheet 206 inserted into the inner side of the wrapping sleeve 205;

[0055] The blade structure 2 is supported and installed by setting an upper hub 12 to cooperate with the lower hub 1, and the internal frame 3 is used to connect the upper hub 12 and the lower hub 1. The blade structure 2 itself is divided into a wrapping sleeve 205 and a rigid plate 206, and the rigid plate 206 is assembled from three units. Units of different shapes can be selected for assembly as needed to adjust the curvature and radian of a single blade. The wrapping sleeve 205 is used to fix its exterior and fill the gap to avoid the possibility of airflow leaking through the seams or impurities getting stuck. The rigid frame 201 is used in conjunction with the auxiliary pin 203 to connect the blade structure 2 with the upper hub 12 and the lower hub 1 to facilitate limiting during loading and unloading.

[0056] Among them, the rigid frame 201 and the rigid support member 204 are both provided with loading and unloading holes on the side close to each other. The rigid frame 201 and the rigid support member 204 are installed through the loading and unloading holes, bolts and screw sleeves. By setting the loading and unloading holes, it is convenient to load and unload the rigid frame 201 and the rigid support member 204 through bolts and screw sleeves. When only the inner structure of the rigid frame 201 needs to be replaced, there is no need to disassemble the entire blade structure 2. It is only necessary to disassemble the rigid support member from the inner side of the rigid frame 201 for adjustment and replacement. The wrapping sleeve 205 includes a flexible body 205a, and the flexible body 205a is made of polyurethane rubber material. The outer side of the flexible body 205a is open, and the opening of the flexible body 205a is provided with an integrally formed baffle. 205b, a transverse groove is provided on the inner side of the baffle 205b and the side of the flexible body 205a in contact with the baffle 205b, a plurality of through holes are provided on the side of the flexible body 205a away from the baffle 205b, an external threaded pin 205c is provided on the inner side of the flexible body 205a, the external threaded pin 205c passes through the transverse groove and the through hole on the inner side of the flexible body 205a and is threadedly connected with an end cap 205d, and a raised outer edge is provided on the side of the end cap 205d close to the baffle 205b. By setting the flexible body 205a, it is used to be wrapped around the outer side of the rigid sheet 206, and an opening is set to cooperate with the baffle 205b. When the rigid sheet 206 is difficult to insert into the interior of the wrapping sleeve 205, it can be inserted from the opening. When the flexible body 205a is attached to the rigid sheet 206 surface, and then blocked at the opening by the baffle 205b, and penetrated through the through hole, the rigid sheet 206 and the transverse groove by the external threaded pin 205c, and screwed to the outside of the baffle 205b by the end cap 205d on the outside of the baffle 205b, and pressed against the outside of the baffle 205b by the raised outer edge to prevent the structure from loosening, for realizing the connection between the wrapping sleeve 205 and the rigid sheet 206, the rigid sheet 206 includes a base segment 206a, and a shaping segment 206b is installed on the side of the base segment 206a away from the middle sleeve 202, and an outer end segment 206c is installed on the side of the shaping segment 206b away from the base segment 206a. By setting the base segment 206a, this segment is usually similar in the blades of various fan structures, playing a role in supporting and providing strength. The shaping section 206b and the outer end section 206c can be processed into plates or sheet metal parts with the required curvature or arc surface as needed, and can be installed on the inner side of the wrapping sleeve 205 after being assembled with the base section 206a. The shaping section 206b is provided with a positive matching groove on one side close to the base section 206a and the outer end section 206c, and a negative matching groove is provided on the side close to the shaping section 206b of the base section 206a and the outer end section 206c. The base section 206a, the outer end section 206c and the shaping section 206b are all provided with stepped grooves relative to the positive matching grooves and the negative matching grooves. The base section 206a, the outer end section 206c and the shaping section 206b are installed by rivet pins passing through the stepped grooves. By setting the positive matching grooves and the negative matching grooves,It is used to prevent the shaping section 206b, the base section 206a and the outer end section 206c from having high unevenness during assembly, so as to avoid affecting the wrapping sleeve 205 and installation or affecting the airflow due to unevenness after installation. By setting stepped grooves and rivet pins, the base section 206a, the outer end section 206c and the shaping section 206b can be firmly installed and fixed. When the single-piece base section 206a, the outer end section 206c or the shaping section 206b is damaged, only the damaged part can be replaced. In the fan structure of larger size, the material and repair and maintenance costs can be effectively reduced. The shaping section 206b is close to the base The inner sides of both base section 206a and outer end section 206c are provided with hollow grooves. The positions of the hollow grooves on the inner sides of base section 206a and outer end section 206c correspond to the transverse grooves on the inner side of baffle 205b. The bottom of upper hub 12 and the top of lower hub 1 are both fixedly connected to limit rings, and the outer sides of the limit rings fit the pre-insertion disk 8. By providing hollow grooves, while allowing threaded pins to pass through, the weight of blade structure 2 can be reduced. Since the outer wrapping sleeve 205 blocks the position of the hollow grooves, the impact on airflow is minimal. When the weight is reduced, the inertia overcome by the fan motor during startup is reduced, resulting in faster startup and lower instantaneous current.

[0057] The working principle of this embodiment is as follows: the blade structure 2 cooperates with the pre-inserted disc 8 pre-slots of the upper hub 12 and the lower hub 1 through the auxiliary pins 203 at the top and bottom of the rigid frame 201 to achieve rapid positioning and loading and unloading with the hub. The middle sleeve 202 on the inner side of the rigid frame 201 is connected with the adjustment sleeve 5 and the driven ring 6 inside the hub to form a mechanical support. The rigid frame 201 is connected to the rigid support member 204 through loading and unloading holes and bolts and screw sleeves. The rigid support member 204 can be disassembled separately to simultaneously disassemble the wrapping sleeve 205 and the rigid sheet 206. There is no need to disassemble the blade structure 2 as a whole, which is convenient for maintenance. The wrapping sleeve 205 adopts a polyurethane rubber flexible body 205a, and the outer opening design is matched with the baffle 205b, the external threaded pin 205c and the end cap 205d. The rigid sheet 206 can be inserted from the opening and sealed and fixed. The external threaded pin 205c passes through the flexible body 205a through hole, rigid sheet 206 and baffle 205b transverse groove, end cap 205d presses baffle 205b through the raised outer edge to prevent the structure from loosening, and at the same time fills the splicing gap of rigid sheet 206 to avoid airflow leakage or impurities getting stuck. Rigid sheet 206 is composed of base section 206a, shaping section 206b, and outer end section 206c spliced ​​together by rivet pins. The base section 206a provides structural strength. The shaping section 206b and outer end section 206c can be processed into units with different curvatures. The surface unevenness is reduced by splicing with positive and negative matching grooves. The stepped groove cooperates with the rivet pin to achieve a stable connection and support the individual replacement of damaged units. The hollow grooves on the inner sides of the shaping section 206b, base section 206a, and outer end section 206c reduce the weight of the blade while being blocked by the wrapping sleeve 205 to avoid affecting the airflow, reduce the starting inertia of the fan, and improve energy efficiency.

[0058] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fan impeller structure capable of modular adjustment and assembly, comprising a lower hub (1), an upper hub (12) and a blade structure (2), characterized in that: The blade structure (2) is arranged between the upper hub (12) and the lower hub (1); the inner side of the upper hub (12) is fixedly connected to an inner frame (3); and the bottom of the inner frame (3) is fixedly connected to the lower hub (1); The blade structure (2) comprises a rigid frame (201), a middle sleeve (202) fixedly connected to a side of the rigid frame (201) close to the inner frame (3), auxiliary pins (203) fixedly connected to the top and bottom of the rigid frame (201), a rigid support member (204) provided on the inner side of the rigid frame (201), a wrapping sleeve (205) fixedly connected to a side of the rigid support member (204) away from the inner frame (3), and a rigid sheet (206) inserted into the inner side of the wrapping sleeve (205); The inner side of the lower hub (1) is slidably connected to a slip ring (4), the top of the slip ring (4) is fixedly connected to a plurality of adjustment sleeves (5), the top of the adjustment sleeve (5) is movably connected to the middle sleeve (202), the top of the adjustment sleeve (5) is provided with a driven ring (6), the bottom of the driven ring (6) is movably connected to the middle sleeve (202), the bottom of the driven ring (6) is movably connected to a through pin (7), the outer side of the through pin (7) passes through the middle sleeve (202) and is plugged into the adjustment sleeve (5), the bottom of the upper hub (12) and the top of the lower hub (1) are both fixedly connected to a pre-insertion disk (8), the bottom of the top pre-insertion disk (8) and the top of the bottom pre-insertion disk (8) are both provided with a pre-slot, and the auxiliary pin (203) is movably connected to the inner side of the pre-slot.

2. The fan impeller structure capable of modular adjustment and assembly according to claim 1, characterized in that: The lower hub (1) comprises a main disc (101), an inner side of the main disc (101) is provided with an axial hole, the bottom of the main disc (101) is fixedly connected to a connecting disc (102), the top of the connecting disc (102) is fixedly connected to an outer disc (103), the top of the main disc (101) is fixedly connected to an inner frame (3), and the slip ring (4) is slidably connected between the main disc (101) and the outer disc (103).

3. The fan impeller structure capable of modular adjustment and assembly according to claim 1, characterized in that: The inner side of the driven ring (6) is provided with through holes corresponding to the number of the adjustment sleeves (5), and the top of the driven ring (6) is provided with a fastening bolt (9), and the bottom of the fastening bolt (9) passes through the through hole on the inner side of the driven ring (6) and is threadedly connected to the through pin (7).

4. The fan impeller structure capable of modular adjustment and assembly according to claim 1, characterized in that: The outer side of the inner frame (3) is fixedly connected to a sub-frame, the inner side of the sub-frame is installed with a stepper motor (10), the output end of the stepper motor (10) is fixedly connected to an external gear, the inner side of the driven ring (6) is fixedly connected to an internal gear, the internal gear and the external gear are meshed, and a double-layer frame is provided on the outer side of the sub-frame.

5. The fan impeller structure capable of modular adjustment and assembly according to claim 4, characterized in that: The surface of the inner frame (3) is movably connected to a limit clamp (11), and the top and bottom of the inner gear are in contact with the limit clamp (11).

6. The fan impeller structure capable of modular adjustment and assembly according to claim 1, characterized in that: The rigid frame (201) and the rigid support member (204) are both provided with mounting holes on the sides where they are close to each other. The rigid frame (201) and the rigid support member (204) are mounted via the mounting holes, bolts, and screw sleeves.

7. The fan impeller structure capable of modular adjustment and assembly according to claim 1, characterized in that: The wrapping sleeve (205) comprises a flexible body (205a), the flexible body (205a) being made of a polyurethane rubber material, the outer side of the flexible body (205a) being open, an integrally formed baffle (205b) being provided at the opening of the flexible body (205a), a transverse groove being provided on the inner side of the baffle (205b) and the side of the flexible body (205a) in contact with the baffle (205b), a plurality of through holes being provided on the side of the flexible body (205a) away from the baffle (205b), an external threaded pin (205c) being provided on the inner side of the flexible body (205a), the external threaded pin (205c) penetrating the transverse groove and the through holes on the inner side of the flexible body (205a) and being threadedly connected to an end cap (205d), and a raised outer edge being provided on the side of the end cap (205d) close to the baffle (205b).

8. The fan impeller structure capable of modular adjustment and assembly according to claim 7, characterized in that: The rigid piece (206) comprises a base section (206a), a shaping section (206b) is installed on a side of the base section (206a) away from the middle sleeve (202), and an outer end section (206c) is installed on a side of the shaping section (206b) away from the base section (206a).

9. The fan impeller structure capable of modular adjustment and assembly according to claim 8, characterized in that: A positive matching groove is provided on one side of the shaping section (206b) close to the base section (206a) and the outer end section (206c), and a negative matching groove is provided on one side of the base section (206a) and the outer end section (206c) close to the shaping section (206b). Step grooves are provided at positions of the base section (206a), the outer end section (206c) and the shaping section (206b) relative to the positive matching groove and the negative matching groove. The base section (206a), the outer end section (206c) and the shaping section (206b) are installed by rivet pins penetrating the step grooves.

10. The fan impeller structure capable of modular adjustment and assembly according to claim 9, characterized in that: The shaping section (206b) is provided with hollow grooves on the inner sides close to the base section (206a) and the outer end section (206c), and the positions of the hollow grooves on the inner sides of the base section (206a) and the outer end section (206c) correspond to the transverse grooves on the inner side of the baffle (205b). The bottom of the upper hub (12) and the top of the lower hub (1) are fixedly connected to the limiting ring, and the outer side of the limiting ring is in contact with the pre-inserted disc (8).

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