Impeller lined with wear-resistant composite board and centrifugal fan

Abstract

The utility model belongs to the technical field of fans, and particularly relates to an impeller and a centrifugal fan attached with a wear-resistant composite board, the impeller comprises a front disc and a rear disc which are oppositely arranged, and a blade with two ends respectively connected to the front disc and the rear disc, an air inlet is arranged at the circle center of the front disc, a rotor port symmetrical to the air inlet is arranged at the circle center of the rear disc, and the rotor port is connected with the front disc and the rear disc. Mounting discs are arranged on the sides, facing each other, of the rear disc and the front disc, and clamping grooves corresponding to the blades are formed in the mounting discs, so that detachable connection between the blades and the front disc and the rear disc is achieved through the arrangement of the mounting discs and the clamping grooves and the combination of fixing blocks and threaded holes at the two ends of the blades, and the connection strength between the blades and the front disc and the rear disc is enhanced; in addition, the maintenance convenience of the impeller is improved, when a certain blade is damaged, the blade can be easily replaced only by unscrewing a screw in a corresponding threaded hole, the whole impeller does not need to be disassembled, and the maintenance time and cost are greatly saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to an impeller lined with a wear-resistant composite plate and a centrifugal fan. Background Art

[0002] Centrifugal fans are suitable for various ventilation and cooling systems such as duct fans, cooling fans, and purification ventilation. Centrifugal fans include centrifugal impellers and motors that drive the centrifugal impellers to rotate. Today's application scenarios have increasingly higher requirements for the air volume and air pressure of centrifugal fans. In centrifugal fans, gas can enter the impeller along the axial direction of the impeller. After entering the impeller, the flow direction of the gas can be changed to radial. The velocity of the fluid micro-groups at any position inside the impeller can be decomposed into circumferential velocity, radial velocity and axial velocity. When the speed of the centrifugal fan is constant, the circumferential velocity remains unchanged, and the flow velocity of the fluid inside the impeller can be along the direction of the rotating shaft. At different blade positions, the proportion of the axial flow velocity component and the radial velocity component increases and decreases. The centrifugal fan can use the high-speed rotating impeller to first accelerate the gas, then decelerate, and then change the flow direction, so that the kinetic energy is converted into pressure potential energy.

[0003] In the prior art, an impeller is generally made of a front disc, a rear disc and a plurality of blades arranged between the front and rear discs. The connection method is generally to directly weld the two sides of the blades between the front and rear discs. This connection structure is relatively simple. When the impeller rotates, the blades will be subject to greater wind resistance. Over time, the welding points between the blades and the front and rear discs are prone to breakage. Secondly, the impeller of this structure is inconvenient to maintain. Welding the blades to the front and rear discs is not convenient for replacing and repairing the blades.

[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background technology of the technology described in this article. Therefore, the background technology may contain certain information that does not form the prior art known in this country to those skilled in the art. Utility Model Content

[0005] In view of this, the utility model provides an impeller and a centrifugal fan lined with a wear-resistant composite plate. The purpose is to realize a detachable connection between the blade and the front and rear disks through the setting of the mounting plate and the slot, combined with the fixing blocks and threaded holes at both ends of the blade, thereby strengthening the connection strength between the blade and the front and rear disks, and improving the maintenance convenience of the impeller. When a blade is damaged, it is only necessary to unscrew the screws in the corresponding threaded hole to easily replace the blade without disassembling the entire impeller, which greatly saves maintenance time and cost.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] An impeller of a lined wear-resistant composite plate includes a front disc and a rear disc arranged opposite to each other, and blades connected to the front disc and the rear disc at both ends. An air inlet is provided at the center of the front disc, and a rotor port symmetrical to the air inlet is provided at the center of the rear disc. Mounting discs are provided on one side of the rear disc and the front disc facing each other. Card slots corresponding to the blades are provided on the mounting discs. Among them, fixing blocks are provided at both ends of the blades, and corresponding threaded holes are provided on both the fixing blocks and the mounting discs.

[0008] As a preferred technical solution, the blades are arranged in an I-shaped structure. Splicing plates corresponding to the card slots are provided at the recessed parts on both sides of the blades, and the fixing blocks protrude from both ends of the splicing plates.

[0009] Furthermore, several vertically distributed columns are provided inside the card slots, and through holes corresponding to the columns are provided on the side of the splicing plate facing the card slots.

[0010] Furthermore, several anti-slip sleeves are sleeved on the column bodies of the columns.

[0011] Furthermore, streamlined air grooves are provided on the surface of the blades.

[0012] Furthermore, wear-resistant plate layers are attached to the inner sides of both the rotor port and the air inlet.

[0013] A centrifugal fan is characterized in that it includes an impeller and a rotating shaft connected to the rotor port, wherein the rotating shaft is connected to an external motor.

[0014] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0015] Through the settings of the mounting discs and the card slots, combined with the fixing blocks and threaded holes at both ends of the blades, the detachable connection between the blades and the front and rear discs is realized, the connection strength between the blades and the front and rear discs is enhanced, and the maintenance convenience of the impeller is also improved. When a certain blade is damaged, only the screws in the corresponding threaded holes need to be unscrewed, and the blade can be easily replaced without disassembling the entire impeller, which greatly saves the maintenance time and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be described by way of examples with reference to the accompanying drawings, wherein:

[0017] Figure 1 is a schematic structural diagram of an impeller and a centrifugal fan of a lined wear-resistant composite plate provided by the present utility model;

[0018] Figure 2 is a schematic structural diagram of the rear disc provided by the present utility model;

[0019] Figure 3It is a schematic structural diagram of the front disc provided by the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the blade provided by the present utility model.

[0021] Rear disc - 1; Front disc - 2; Blade - 3; Rotor port - 4; Mounting disc - 5; Card slot - 6; Column - 7; Threaded hole - 8; Air inlet - 9; Splicing plate - 10; Perforation - 11; Fixed block - 12. Specific embodiments

[0022] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1

[0024] In the prior art, an impeller usually consists of a front disc, a rear disc, and a plurality of blades arranged therebetween. Its assembly method mainly adopts a direct welding method to fix both sides of the blade between the front and rear discs. However, this connection structure is relatively single. During the operation of the impeller, the blade will encounter a large wind resistance. Over time, the welding points between the blade and the front and rear discs are easily damaged, resulting in an increased risk of fracture. In addition, the impeller of this structure is inconvenient for maintenance. The welding structure of the blade and the front and rear discs makes the replacement and maintenance operations of the blade complicated.

[0025] Therefore, in order to solve the problems that the solder joints of the existing blades are easily damaged after long-term use, and the replacement and maintenance of the blades are relatively inconvenient, and to achieve the functions of simplifying the blade installation process and extending the service life of the blades, the present utility model discloses an impeller with a lined wear-resistant composite plate. Refer to Figures 1-4 , including a front disc 2 and a rear disc 1 arranged opposite to each other, and blades 3 respectively connected to the front disc 2 and the rear disc 1 at both ends. An air inlet 9 is provided at the center of the front disc 2, and a rotor port 4 symmetric to the air inlet 9 is provided at the center of the rear disc 1. Specifically, mounting discs 5 are provided on the sides of the rear disc 1 and the front disc 2 facing each other. Card slots 6 corresponding to the blades 3 are opened on the mounting discs 5. Among them, fixed blocks 12 are provided at both ends of the blades 3, and corresponding threaded holes 8 are provided on both the fixed blocks 12 and the mounting discs 5;

[0026] In this embodiment, when the blade 3 needs to be installed, only one side of the blade 3 needs to be clamped in the card slot 6 of the mounting disc 5 provided on the rear disc 1. Subsequently, the fixing block 12 is aligned with the threaded hole 8 on the mounting disc 5, and an external bolt is used to screw into the threaded hole 8 so that the blade 3 can be fixed on the mounting disc 5. After all the blades 3 are fixed on the rear disc 1 by the above method, the user can use the above method again to fix the other side of the blade 3 on the mounting disc 5 on the front disc 2. When the blade 3 needs to be removed for maintenance or replacement, the user only needs to remove the bolt on the mounting disc 5 to remove the corresponding blade 3. Through the above solution, the welding fixation of the blade 3 in the prior art can be changed to a clamped bolt fixation, which is convenient for disassembling and assembling the blade 3 and is not prone to the situation that the solder joints are damaged due to long-term use, thereby improving the stability of the blade 3.

[0027] In this embodiment, the blade 3 is provided with an included angle between the centers of the front disc 2 and the rear disc 1. Among them, the included angle a is an acute angle. Preferably, the included angle a is 35 degrees. Through this setting, the angle of the flow channel can be further adjusted to better adapt to the flow characteristics of the air flow. Specifically, when the included angle a is set to 35 degrees, the inclination of the flow channel is moderate, which can effectively guide the air flow to flow along the surface of the blade 3, reduce the collision and separation of the air flow on the blade 3, thereby reducing the generation of eddy currents, improving the operating efficiency of the fan and reducing noise.

[0028] At the same time, the inclination angle of the card slot 6 on the front disc 2 or the rear disc 1 corresponds to the blade 3. Therefore, the card slot 6 can play a role of limiting and guiding when the blade 3 is installed. When the blade 3 is first installed on the rear disc 2, the user can install the blade 3 according to the position of the card slot 6 so that the distance and inclination angle between the blades 3 are consistent.

[0029] Embodiment Two

[0030] On the basis of Embodiment One, in order to further improve the stability of the blade 3, the present invention further includes a splicing plate 10. Refer to Figure 4 , specifically, the blade 3 is arranged in an I-shaped structure, and splicing plates 10 corresponding to the card slots 6 are provided at the concave parts on both sides of the blade 3, and the fixing blocks 12 protrude from both ends of the splicing plate 10.

[0031] In this embodiment, through the above setting, when the front disc 2 and the rear disc 1 are closed, the splicing plates 10 on both sides of the blade 3 will be embedded in the card slot 6, and at the same time, the fixing blocks 12 located at both ends of the splicing plate 10 will abut against the outside of the openings at both ends of the card slot 6 to play a clamping effect on the blade 3 and further improve the fixing effect on the blade 3.

[0032] Embodiment Three

[0033] On the basis of the second embodiment, in order to avoid the situation where the blades 3 shake when the impeller 3 rotates, refer to Figures 2-4 , the present utility model further includes a column 7 for limiting. Specifically, several vertically distributed columns 7 are provided inside the card slot 6, and a through hole 11 corresponding to the column 7 is provided on the side of the splicing plate 10 facing the card slot 6;

[0034] In this embodiment, by arranging several vertically distributed columns 7 inside the card slot 6 and providing through holes 11 corresponding to the columns 7 on the splicing plate 10 of the blade 3, when the blade 3 is installed into the card slot 6, the through holes 11 will cooperate with the columns 7, so that the position of the blade 3 in the card slot 6 can be fixed, effectively avoiding the situation where the blade 3 shakes when the impeller 3 rotates, thereby improving the stability and operation efficiency of the impeller 3;

[0035] At the same time, since the blade 3 needs to be erected on the mounting disc 5 during the installation process, at this time, since the column 7 is inserted into the through hole 11, the blade 3 will not tip over during the erection process, and the installer does not need to continuously hold the blade 3, and only needs to directly connect the fixing block 12 to the mounting disc 5 with bolts, thereby further improving the installation convenience of the blade 3;

[0036] Furthermore, several anti-slip sleeves are sleeved on the column body of the column 7. Among them, the anti-slip sleeve can be selected as a rubber sleeve, but is not limited thereto. Through the setting of the anti-slip sleeve, the friction between the column 7 and the through hole 11 can be increased, further preventing the blade 3 from shaking during the rotation of the impeller 3. In addition, the anti-slip sleeve can also protect the column 7 and the through hole 11 to a certain extent, reduce the wear caused by long-term friction, and thus extend the service life of the impeller.

[0037] Embodiment Four

[0038] On the basis of the first embodiment, in order to increase the air flow rate in the impeller and avoid the formation of eddy currents in the impeller, the present utility model further includes an air groove for accelerating the air flow. Specifically, a streamline-shaped air groove is provided on the surface of the blade 3;

[0039] In this embodiment, by providing a streamline-shaped air groove on the surface of the blade 3, the flow path of the air flow can be effectively changed, the air flow rate can be increased, and the adhesion and separation of the air flow on the surface of the blade 3 can be reduced, thereby reducing the generation of eddy currents. At the same time, the streamline-shaped air groove can also reduce the resistance of the blade 3 to the air flow, reduce energy consumption, and further improve the performance of the fan;

[0040] In addition, the shape of the air groove can also be designed in various ways, such as straight line type, curve type, wave type, etc., to adapt to different air flow characteristics and requirements.

[0041] Embodiment Five

[0042] On the basis of the first embodiment, in order to further reduce the wear generated between the front disc 2 and the rear disc 1 during the rotation of the impeller, the present utility model further includes a wear-resistant laminate for reducing wear. Specifically, wear-resistant plates are attached to the inner sides of the rotor port 4 and the air inlet 9.

[0043] In this embodiment, by attaching wear-resistant plates to the inner sides of the rotor port 4 and the air inlet 9, the wear generated between the front disc 2 and the rear disc 1 during the rotation of the impeller can be effectively reduced. The wear-resistant plates can be made of materials with high hardness and high wear resistance, such as ceramics, cemented carbides, etc., to ensure their stable performance under the condition of long-term high-speed rotation.

[0044] Embodiment Six

[0045] On the basis of any one of the first to fifth embodiments, the present utility model further discloses a centrifugal fan, including an impeller and a rotating shaft connected to the rotor port 4, wherein the rotating shaft is connected to an external motor to drive the impeller to rotate.

[0046] Specifically, the centrifugal fan drives the rotating shaft to rotate through the motor, thereby driving the impeller to rotate at a high speed, generating a strong centrifugal force, sucking the air flow from the air inlet 9, and accelerating and discharging the air flow through the rotation of the impeller.

[0047] In this embodiment, due to adopting the impeller structure with the lined wear-resistant composite plate described in any of the above embodiments, the centrifugal fan can have higher efficiency and lower noise during operation. Specifically, by optimizing the installation method and structural design of the blades 3, the collision and separation of the air flow on the blades 3 are effectively reduced, the generation of eddy currents is reduced, thereby improving the operation efficiency of the fan and reducing the noise.

[0048] In addition, the centrifugal fan also has better stability and reliability. By adopting the bolt clamping type for fixing the blades 3, the disassembly and assembly of the blades 3 are more convenient and fast, and the situation of the solder joints being damaged due to long-term use is also avoided. At the same time, by arranging the columns 7 and the through holes 11 inside the card slots 6, the stability of the blades 3 during rotation is further improved, and the shaking and tipping of the blades 3 are avoided.

[0049] In summary, through the above solutions, the centrifugal fan has higher efficiency, lower noise, better stability and reliability during operation, and thus can better meet the requirements of various industrial and commercial applications.

[0050] In the description of this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An impeller of a lined wear-resistant composite plate, comprising a front disc (2) and a rear disc (1) arranged opposite to each other, and blades (3) connected to the front disc (2) and the rear disc (1) at both ends respectively. An air inlet (9) is provided at the center of the front disc (2), and a rotor port (4) symmetrical to the air inlet (9) is provided at the center of the rear disc (1). It is characterized in that, On one side of the rear disc (1) and the front disc (2) facing each other, there are mounting discs (5). A card slot (6) corresponding to the blade (3) is provided on the mounting disc (5). Among them, fixing blocks (12) are provided at both ends of the blade (3), and corresponding threaded holes (8) are provided on both the fixing blocks (12) and the mounting disc (5).

2. The impeller of the backing wear-resistant composite plate according to claim 1, characterized in that, The blade (3) is arranged in an I-shaped structure. On the concave parts on both sides of the blade (3), there are splicing plates (10) corresponding to the card slots (6), and the fixing blocks (12) protrude from both ends of the splicing plates (10).

3. The impeller of the lining wear-resistant composite plate according to claim 2, characterized in that, Inside the card slot (6), there are several vertically distributed columns (7). On the side of the splicing plate (10) facing the card slot (6), there are through holes (11) corresponding to the columns (7).

4. The impeller of the lining wear-resistant composite plate according to claim 3, characterized in that, Several anti-slip sleeves are sleeved on the column body of the column (7).

5. The impeller of the lined wear-resistant composite plate according to claim 1, characterized in that, A streamlined air groove is provided on the surface of the blade (3).

6. The impeller of the lined wear-resistant composite plate according to claim 1, characterized in that, Wear-resistant plate layers are attached to the inner sides of the rotor port (4) and the air inlet (9).

7. A centrifugal fan, characterized in that, It includes an impeller as described in any one of claims 1 to 6 and a rotating shaft connected to the rotor port (4), wherein the rotating shaft is connected to an external motor.

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