Fan blade quick-changing type centrifugal fan

Abstract

The utility model belongs to the technical field of centrifugal fans, and discloses a fan blade quick-change type centrifugal fan which comprises a support, the top end of the support is fixedly connected with a machine box and a power motor, a fan blade assembly is arranged in the machine box and comprises a rear splicing plate, a plurality of fan blades are arranged at one end of the rear splicing plate, and the rear splicing plate is fixedly connected with the power motor. One end of each fan blade is fixedly connected with a dovetail block, one end of the rear splicing plate is provided with a dovetail groove used in cooperation with the dovetail blocks, the other end of each fan blade is provided with a front splicing plate, and the other end of each fan blade is fixedly connected with a round rod; by arranging the transmission shaft and the clamping rod, the fan blade replacement time is greatly shortened, the maintenance efficiency of equipment is remarkably improved, the fan blade specification can be quickly and flexibly adjusted according to different working condition requirements, and efficient production operation is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to centrifugal fan technical field, specifically a fan quick change type centrifugal fan. BACKGROUND

[0002] Centrifugal fan is a kind of machinery that relies on the input mechanical energy, improves gas pressure and sends gas. Its working principle is to accelerate gas by high-speed rotating impeller, and then convert kinetic energy into pressure energy by volute. Centrifugal fan has wide application in many fields such as industrial production, building ventilation, environmental protection, etc.

[0003] Meanwhile, the patent specification with the application number CN221503561U discloses a fan with quickly replaceable blades, "including motor and fan leaf, the output end of the motor is fixedly connected with the rotating rod, the end of the rotating rod is fixedly connected with the limit block one, the connecting perforation sidewall of the fan leaf is provided with the limit slot one matched with the limit block one, the inner end surface of the fan leaf is provided with the clamping groove vertically arranged with the limit slot one, the clamping groove is matched with the limit block one, the rotating rod is provided with the locking assembly"; the existing centrifugal fan in the use process, fan blade assembly is usually fixedly installed on the motor rotating shaft, when fan blade assembly needs to replace different specifications of fan blade to adapt to different working conditions, the replacement operation is extremely tedious and complex, needs professional tool and a large amount of time to disassemble and install, seriously affects work efficiency, secondly, the fan blade assembly of traditional centrifugal fan is mostly an integral body and cannot be disassembled, when one of the blades is damaged, the whole needs to be replaced, which increases the use cost of product.

[0004] Therefore, a fan quick change type centrifugal fan is proposed for the above problems. INVENTION CONTENTS

[0005] To solve the problems in the above background art, the utility model provides a fan quick change type centrifugal fan, which can quickly and flexibly adjust the fan size according to different working conditions, ensure efficient production operation, effectively reduce the use cost of product, prolong the service life of the whole fan blade assembly and improve the resource utilization rate.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a fan quick change type centrifugal fan, including support, the top of the support is fixedly connected with machine case and power motor, the machine case is equipped with fan blade assembly, the fan blade assembly includes rear splice plate, one end of the rear splice plate is equipped with a plurality of fan blades, one end of a plurality of fan blades is fixedly connected with dovetail block, the other end of a plurality of fan blades is equipped with front splice plate, one end of the front splice plate is provided with dovetail groove matched with a plurality of dovetail blocks, the other end of a plurality of fan blades is fixedly connected with round rod, one end of the front splice plate is provided with round groove matched with a plurality of round rods.

[0007] Preferably, both ends of the plurality of the fan blades are fixedly provided with rubber soft pads.

[0008] Preferably, one end of the plurality of the dovetail blocks is provided with an elastic protrusion, and the plurality of the dovetail grooves are provided with grooves matched with the elastic protrusions.

[0009] Preferably, the outer surface of the case is fixedly connected with a mounting plate through bolts, one end of the mounting plate is provided with a guide groove, and the other end of the rear splice plate is provided with a guide strip matched with the guide groove.

[0010] Preferably, the output end of the power motor is fixedly connected with a transmission shaft, one end of the transmission shaft penetrates through the case and the rear splice plate and extends to one side of the rear splice plate, one end of the rear splice plate is fixedly connected with a fixed disc seat, the fixed disc seat and the transmission shaft are both provided with clamping grooves, a clamping rod is movably inserted into the inner surfaces of the two clamping grooves, and a return spring is wound around the outer surface of the clamping rod.

[0011] Preferably, the outer surface of the transmission shaft is fixedly connected with two positioning strips, and the inner surface of the front splice plate is provided with positioning grooves matched with the two positioning strips.

[0012] Preferably, one end of the return spring is fixedly connected with a limiting plate, the limiting plate is fixedly sleeved with the clamping rod, one end of the limiting plate is attached to the transmission shaft, and the other end of the return spring is fixedly connected with the inner wall of one side of the clamping groove.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] Firstly, the utility model discloses a transmission shaft and a clamping rod, when the fan blade needs to be replaced, the operator only needs to pull the clamping rod to easily take down the fan blade assembly from the transmission shaft, greatly shortens the fan blade replacement time, significantly improves the equipment maintenance efficiency, can quickly and flexibly adjust the fan blade specification according to different working conditions, and guarantees the efficient production operation.

[0015] Secondly, the utility model discloses a fan blade assembly, when one of the fan blades is damaged, the damaged fan blade can be disassembled from the splice plate and replaced with a new one, avoiding the drawbacks that the traditional integral fan blade assembly needs to be replaced as a whole when one blade is damaged, effectively reducing the product use cost, prolonging the service life of the whole fan blade assembly, and improving the resource utilization. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2 It is an explosion view of the fan blade assembly and the power motor of the utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0019] Figure 4 This is a schematic diagram of the mounting plate of this utility model;

[0020] Figure 5 This is a schematic diagram of the wind turbine blade structure of this utility model.

[0021] In the diagram: 1. Bracket; 2. Chassis; 3. Power motor; 4. Fan blade assembly; 41. Guide strip; 411. Guide groove; 42. Rear splicing plate; 43. Dovetail groove; 44. Front splicing plate; 45. Fan blade; 451. Dovetail block; 452. Elastic protrusion; 453. Round rod; 5. Mounting plate; 51. Limiting plate; 52. Slot; 53. Connecting rod; 54. Return spring; 55. Positioning groove; 56. Drive shaft; 57. Positioning strip; 58. Fixed plate base. Detailed Implementation

[0022] 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.

[0023] like Figures 1 to 5 As shown, this utility model provides a centrifugal fan with quick-change blades, including a support 1. The top of the support 1 is fixedly connected to a housing 2 and a power motor 3. The power motor 3 is used to drive the centrifugal fan. The housing 2 is provided with a blade assembly 4. The blade assembly 4 includes a rear splicing plate 42. One end of the rear splicing plate 42 is provided with multiple fan blades 45. One end of each fan blade 45 is fixedly connected to a dovetail block 451. The other end of the multiple fan blades 45 is provided with a front splicing plate 44. One end of the front splicing plate 44 is provided with a dovetail groove 43 that is used with the multiple dovetail blocks 451. The other end of each fan blade 45 is fixedly connected to a round rod 453. One end of the front splicing plate 44 is provided with a round groove that is used with the multiple round rods 453.

[0024] Specifically, rubber pads are fixed at both ends of multiple fan blades 45. The rubber pads can effectively buffer the vibration generated at the connection between the fan blades 45 and the front and rear splicing plates 42 when the fan blades 45 rotate at high speed.

[0025] like Figures 1 to 5As shown, each of the multiple dovetail blocks 451 has an elastic protrusion 452 at one end, and each of the multiple dovetail grooves 43 has a groove that is used to cooperate with the elastic protrusion 452. The cooperation between the elastic protrusion 452 and the groove enhances the connection tightness between the dovetail block 451 and the dovetail groove 43. During the operation of the fan, it effectively prevents the fan blade 45 from falling off the rear splicing plate 42 due to centrifugal force or vibration, and ensures the structural integrity of the fan blade assembly 4.

[0026] Furthermore, the outer surface of the chassis 2 is fixedly connected to the mounting plate 5 by bolts. One end of the mounting plate 5 is provided with a guide groove 411, and the other end of the rear splicing plate 42 is equipped with a guide strip 41 that works in conjunction with the guide groove 411. This provides precise guidance during the installation of the fan blade assembly 4, making it easy for the rear splicing plate 42 to be quickly and accurately inserted into the predetermined position inside the chassis 2, thereby improving installation efficiency, reducing installation errors, and effectively fixing the fan blade assembly 4 during operation without affecting its rotation.

[0027] like Figures 1 to 5 As shown, the output end of the power motor 3 is fixedly connected to a drive shaft 56. One end of the drive shaft 56 passes through the housing 2 and the rear splicing plate 42 and extends to one side of the rear splicing plate 42. One end of the rear splicing plate 42 is fixedly connected to a fixed plate base 58. Both the fixed plate base 58 and the drive shaft 56 are provided with slots 52. The inner surfaces of the two slots 52 are movably inserted with a locking rod 53. The outer surface of the locking rod 53 is wrapped with a return spring 54. This connection method is simple and firm, and is easy to install and disassemble. It can be easily separated by simply operating the locking rod 53, reducing maintenance difficulty and time cost, and improving the maintainability and utilization rate of the equipment.

[0028] It is worth noting that two positioning strips 57 are fixedly connected to the outer surface of the drive shaft 56, and the inner surface of the front splicing plate 44 is provided with positioning grooves 55 that cooperate with the two positioning strips 57, which ensures the concentricity of the fan blade assembly 4 with the drive shaft 56 during rotation, making the device run more smoothly.

[0029] like Figures 1 to 5 As shown, one end of the return spring 54 is fixedly connected to the limiting plate 51, the limiting plate 51 is fixedly sleeved with the snap-fit ​​rod 53, and one end of the limiting plate 51 is in contact with the drive shaft 56. The other end of the return spring 54 is fixedly connected to the inner wall of one side of the slot 52. During the operation of the fan, the return spring 54 continuously provides elastic force to prevent the snap-fit ​​rod 53 from loosening and falling off due to vibration or other external forces, further enhancing the stability and reliability of the connection between the drive shaft 56 and the rear splicing plate 42.

[0030] The power motor 3 is existing technology and will not be described in detail. Additionally, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described in detail. The wiring diagram of the motor in this utility model is common knowledge in the field, and its working principle is already known technology. The appropriate model is selected based on actual use; therefore, the control method and wiring layout of the motor will not be explained in detail.

[0031] Working principle and process: When it is necessary to disassemble the centrifugal fan blades, first loosen the bolts to remove the mounting plate 5, then overcome the elastic force of the return spring 54 to pull out the locking rod 53, so that the locking rod 53 disengages from the slot 52 on the drive shaft 56. Then the fan blade assembly 4 can be removed. When one of the fan blades is damaged, remove the front splicing plate 44 on the fan blade assembly 4, overcome the elastic force of the elastic protrusion 452, and remove the fan blade 45 that needs to be replaced through the dovetail groove 43. Then reinstall the front splicing plate 44. Then install the fan blade assembly 4 onto the drive shaft 56 through the positioning strip 57 and the positioning groove 55. Pull out the locking rod 53. Then, under the action of the return spring 54, the locking rod 53 can pass through the two round grooves to make the fan blade assembly 4 and the drive shaft 56 securely connected. Then reinstall the mounting plate 5.

[0032] 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.

Claims

1. A centrifugal fan with quick-change blades, comprising a support frame (1), characterized in that: The top of the bracket (1) is fixedly connected to the housing (2) and the power motor (3). The housing (2) is provided with a fan blade assembly (4). The fan blade assembly (4) includes a rear splicing plate (42). One end of the rear splicing plate (42) is provided with multiple fan blades (45). One end of each of the multiple fan blades (45) is fixedly connected with a dovetail block (451). The other end of the multiple fan blades (45) is provided with a front splicing plate (44). One end of the front splicing plate (44) is provided with a dovetail groove (43) for use with the multiple dovetail blocks (451). The other end of each of the multiple fan blades (45) is fixedly connected with a round rod (453). One end of the front splicing plate (44) is provided with a round groove for use with the multiple round rods (453).

2. The centrifugal fan with quick-change blades according to claim 1, characterized in that: Rubber pads are fixed at both ends of the multiple fan blades (45).

3. A centrifugal fan with quick-change blades according to claim 1, characterized in that: Each of the dovetail blocks (451) has an elastic protrusion (452) at one end, and each of the dovetail grooves (43) has a groove that is used in conjunction with the elastic protrusion (452).

4. A centrifugal fan with quick-change blades according to claim 3, characterized in that: The outer surface of the chassis (2) is fixedly connected to a mounting plate (5) by bolts. One end of the mounting plate (5) is provided with a guide groove (411), and the other end of the rear splicing plate (42) is equipped with a guide strip (41) that works in conjunction with the guide groove (411).

5. A centrifugal fan with quick-change blades according to claim 1, characterized in that: The output end of the power motor (3) is fixedly connected to a drive shaft (56). One end of the drive shaft (56) passes through the chassis (2) and the rear splicing plate (42) and extends to one side of the rear splicing plate (42). One end of the rear splicing plate (42) is fixedly connected to a fixed plate seat (58). Both the fixed plate seat (58) and the drive shaft (56) are provided with slots (52). The inner surfaces of the two slots (52) are movably inserted with a locking rod (53). The outer surface of the locking rod (53) is wrapped with a return spring (54).

6. A centrifugal fan with quick-change blades according to claim 5, characterized in that: Two positioning strips (57) are fixedly connected to the outer surface of the drive shaft (56), and a positioning groove (55) is provided on the inner surface of the front splicing plate (44) to cooperate with the two positioning strips (57).

7. A centrifugal fan with quick-change blades according to claim 5, characterized in that: One end of the reset spring (54) is fixedly connected to a limiting plate (51), the limiting plate (51) is fixedly sleeved with the snap-fit ​​rod (53), and one end of the limiting plate (51) is in contact with the drive shaft (56). The other end of the reset spring (54) is fixedly connected to the inner wall of one side of the slot (52).

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