Centrifugal fan blade structure and centrifugal fan

Abstract

The utility model discloses a centrifugal fan blade structure which comprises a blade arranged between an impeller rear disc and an impeller front disc, T-shaped clamping blocks are fixed to the two ends of the blade, a plurality of through grooves are formed in the circumference of the bottom face of the impeller rear disc at equal intervals, and second T-shaped grooves connected with the through grooves are formed in the top face of the impeller rear disc. The T-shaped clamping blocks at the bottoms of the blades can be inserted into the through grooves and then move into the second T-shaped grooves, a first T-shaped groove is formed in the top face of the impeller front disc, a plurality of second fixing pieces are placed on the top face of the impeller rear disc, and limiting insertion blocks capable of being inserted into the through grooves are fixed to the bottom faces of the second fixing pieces. A second fixing bolt in threaded connection with the impeller rear disc is arranged on the top face of the second fixing piece in a penetrating mode, the blades are released by disassembling the second fixing piece and the first fixing piece of the section, and therefore other blades do not need to be positioned and connected, and operation convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan field, in particular to a centrifugal fan fan blade structure and centrifugal fan. BACKGROUND

[0002] The centrifugal fan impeller is the core component of the centrifugal fan, responsible for converting electrical energy into mechanical energy. Its main function is to generate centrifugal force through rotation, enabling air or other gases to gain kinetic energy, thereby achieving the delivery and pressurization of gases. The working principle of the centrifugal fan is mainly the conversion of centrifugal force and kinetic energy. When the fan is running, air is sucked in through the impeller, and the air is accelerated during the rotation of the impeller, thereby being discharged from the outlet based on the generated centrifugal force.

[0003] As disclosed in the utility model with the authorized announcement number CN218581905U, a mine centrifugal fan blade, by rotating to remove the nut and anti-skid gasket, the damaged blade can be replaced singly by removing the snap ring, reducing maintenance funds, the square shaft can be connected inside the connecting plate, preventing the connecting plate from sliding with the blade and the connecting plate when rotating, affecting normal use.

[0004] This prior art has the following problems when in use:

[0005] By rotating to remove the nut and anti-skid gasket, the damaged blade can be replaced singly by removing the snap ring, but when only replacing individual blades, the other blades also have the problem of disengaging after the snap ring is removed. After replacement is completed, each square shaft needs to be aligned with the square hole of the snap ring, which makes the operation cumbersome. UTILITY MODEL CONTENTS

[0006] In order to overcome the shortcomings of the prior art, the utility model provides a centrifugal fan fan blade structure and centrifugal fan, which can solve the following technical problems: although the damaged blade can be replaced singly by removing the snap ring when rotating to remove the nut and anti-skid gasket, other blades also have the problem of disengaging when only replacing individual blades; and after replacement is completed, each square shaft needs to be aligned with the square hole of the snap ring, which makes the operation of replacing the blades cumbersome.

[0007] To solve the above technical problems, the utility model provides technical scheme as follows: A centrifugal fan blade structure, including the blade being arranged between the back disc of impeller and the front disc of impeller, both ends of the blade are fixed with T type clamping block, the bottom surface of back disc of impeller is opened with a plurality of through grooves at equal distance, the top surface of back disc of impeller is opened with the second T type groove being connected with through groove, the T type clamping block of blade bottom can be inserted to the inside of second T type groove after moving to through groove, the top surface of front disc of impeller is opened with the first T type groove, the top surface of back disc of impeller is placed with a plurality of second fixed sheet, the bottom surface of second fixed sheet is fixed with the limiting plug being inserted into through groove, the top surface of second fixed sheet is equipped with the second fixed bolt being connected with back disc of impeller threadedly.

[0008] As a preferred technical scheme of the utility model, the top surface of the front disc of the impeller is placed with a first fixed sheet, the bottom surface of the first fixed sheet is fixed with a limiting arc plate, the limiting arc plate is located in the inner ring of the front disc of the impeller, and the top surface of the first fixed sheet is equipped with a first fixed bolt connected with the front disc of the impeller threadedly.

[0009] As a preferred technical scheme of the utility model, the outer side of the T type clamping block has the same radius as the inner ring of the front disc of the impeller.

[0010] As a preferred technical scheme of the utility model, the limiting arc plate is attached to the inner ring of the front disc of the impeller.

[0011] As a preferred technical scheme of the utility model, both ends of the blade are provided with limiting blocks, and the T type clamping block is fixedly connected with the limiting blocks.

[0012] As a preferred technical scheme of the utility model, the cross-sectional dimension of the limiting plug is the same as the cross-sectional dimension of the through groove.

[0013] As a preferred technical scheme of the utility model, the bottom of the back disc of the impeller is fixed with a shaft connecting portion.

[0014] A centrifugal fan includes a fan housing and the centrifugal fan blade structure described above, and the blade structure is arranged in the inside of the fan housing.

[0015] Compared with the prior art, the utility model can achieve the beneficial effects that:

[0016] 1. The T-shaped clamping block arranged at both ends of the blade is designed, the T-shaped clamping block at both ends can be clamped with the impeller rear disc and the through groove respectively, so that the impeller rear disc and the impeller front disc are connected, the lower end of the blade is limited by inserting the limiting insert block into the inside of the through groove, and the blade is fixed and limited by the fixed limiting arc plate and the second fixing piece, so that the second fixing piece and the first fixing piece are fixed to a smaller number of blades, when the blade is replaced, the second fixing piece and the first fixing piece of the segment are disassembled to release the blade, so that other blades do not need to be positioned and connected, and the operation convenience is improved.

[0017] 2. The limiting block arranged at both ends of the blade is designed, when the T-shaped clamping block is matched with the first T-shaped groove, the limiting blocks at both ends are attached to the impeller front disc and the impeller rear disc, so that the contact area of the blade with the impeller rear disc and the impeller front disc is increased, and the stability of the blade is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the centrifugal fan of the utility model;

[0019] Figure 2 It is a three-dimensional structure schematic view of the fan blade structure of the utility model;

[0020] Figure 3 It is a local separated structure schematic view of the fan blade structure of the utility model;

[0021] Figure 4 It is a three-dimensional structure schematic view of the centrifugal fan of the utility model Figure 3 It is a top view structure schematic view;

[0022] Figure 5 It is a sectional structure schematic view of the utility model Figure 4 at A-A;

[0023] Among them: 1, fan shell; 2, impeller rear disc; 3, limiting block; 4, blade; 5, impeller front disc; 6, first fixing piece; 7, first fixed bolt; 8, limiting arc plate; 9, second fixing piece; 10, second fixed bolt; 11, shaft connecting part; 12, second T-shaped groove; 13, through groove; 14, limiting insert block; 15, first T-shaped groove; 16, T-shaped clamping block. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Please refer to Figure 1 - Figure 5 As shown in the figure, the utility model provides a centrifugal fan, including fan casing 1 and the fan blade structure that sets up in fan casing 1, fan blade structure includes impeller back disc 2 and impeller front disc 5, the bottom of impeller back disc 2 is fixed with the shaft connecting portion 11, the shaft connecting portion 11 passes through the side plate of fan casing 1 and is connected with the motor of outside world after;Impeller back disc 2 with impeller front disc 5 between be provided with multiple blades 4, both ends of blade 4 are fixedly provided with T type block 16.

[0026] The top surface of impeller back disc 2 is provided with several through grooves 13, the number of through groove 13 corresponds with the number of blade 4, through groove 13 circumferentially equidistant distribution, the top surface of impeller back disc 2 is provided with second T type slot 12, second T type slot 12 is connected with through groove 13, T type block 16 can pass through through groove 13 and move to the inside of second T type slot 12, second T type slot 12 and T type block 16 can stably cooperate and connect, when second T type slot 12 cooperates with T type block 16, the bottom limit block 3 is attached with impeller back disc 2, the top surface of impeller back disc 2 is provided with multiple second fixed pieces 9, the bottom end of second fixed piece 9 is fixed with limit insert block 14, limit insert block 14 can be inserted into the inside of through groove 13, and the cross-sectional dimension of limit insert block 14 is same with the cross-sectional dimension of through groove 13, the cross-sectional dimension of through groove 13 is same with the cross-sectional dimension of limit block 3, so that limit insert block 14 is tightly matched with through groove 13, the top surface of second fixed piece 9 is provided with second fixed bolt 10 that is connected with impeller back disc 2 with screw thread, so as to fix the bottom of blade 4.

[0027] The inner ring of impeller front disc 5 is provided with first T type slot 15, the number of first T type slot 15 corresponds with the number of blade 4, when T type block 16 is engaged in place with first T type slot 15, limit block 3 is attached with the bottom of impeller front disc 5, and one side of T type block 16 is arc-shaped, so that the arc radius of T type block 16 is same with the inner ring radius of impeller front disc 5, the top surface of impeller front disc 5 is placed with segmented first fixed piece 6, the bottom surface of first fixed piece 6 is fixed with limit arc plate 8, limit arc plate 8 is attached with the inner ring of impeller front disc 5, the top surface of first fixed piece 6 is provided with first fixed bolt 7 that is connected with impeller front disc 5 with screw thread, so as to limit and fix the top end of blade 4 through fixed limit arc plate 8.

[0028] Specific working principle:

[0029] When the blade 4 needs to be replaced, the whole blade structure does not need to be disassembled from the centrifugal fan, only the shielding plate outside the fan to the blade structure needs to be disassembled, the first fixing bolt 7 and the second fixing bolt 10 of the section where the blade 4 needs to be replaced are disassembled, the first fixed sheet 6 and the second fixed sheet 9 are removed, the blade 4 is moved, the T-shaped clamping block 16 at the bottom is moved to the position of the through slot 13, at this time the limiting block 3 will not be clamped by the front disc 5 of the impeller, the blade 4 can be pulled out, the replaced blade 4 is inserted into the inside of the through slot 13, the blade 4 is moved, the T-shaped clamping block 16 is clamped with the second T-shaped slot 12 and the first T-shaped slot 15 respectively, the second fixed sheet 9 is moved, the limiting plug-in block 14 below the second fixed sheet 9 is inserted into the inside of the through slot 13, then the second fixed sheet 9 is fixed through the second fixing bolt 10, so that the bottom end of the blade 4 is fixed, then the upper end of the blade 4 is fixed through the fixing of the first fixed sheet 6, so that the disassembly and replacement of the blade 4 are realized.

[0030] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only preferred examples of the utility model and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A centrifugal fan blade structure, comprising blades (4) disposed between an impeller rear plate (2) and an impeller front plate (5), characterized in that: T-shaped locking blocks (16) are fixed at both ends of the blade (4). Several through slots (13) are equidistantly opened on the bottom circumference of the impeller rear disc (2). A second T-shaped slot (12) connected to the through slot (13) is opened on the top surface of the impeller rear disc (2). The T-shaped locking blocks (16) at the bottom of the blade (4) can be inserted into the through slot (13) and then moved into the second T-shaped slot (12). A first T-shaped slot (15) is opened on the top surface of the impeller front disc (5). Several second fixing plates (9) are placed on the top surface of the impeller rear disc (2). A limiting plug (14) that can be inserted into the through slot (13) is fixed on the bottom surface of the second fixing plate (9). A second fixing bolt (10) that is threadedly connected to the impeller rear disc (2) is passed through the top surface of the second fixing plate (9).

2. The centrifugal fan blade structure according to claim 1, characterized in that: The top surface of the impeller front disc (5) is provided with a first fixing plate (6), and the bottom surface of the first fixing plate (6) is fixed with a limiting arc plate (8). The limiting arc plate (8) is located in the inner ring of the impeller front disc (5). The top surface of the first fixing plate (6) is provided with a first fixing bolt (7) that is threadedly connected to the impeller front disc (5).

3. The centrifugal fan blade structure according to claim 2, characterized in that: The outer side of the T-shaped block (16) has the same radius as the inner ring of the impeller front disc (5).

4. The centrifugal fan blade structure according to claim 3, characterized in that: The limiting arc plate (8) is in contact with the inner ring of the impeller front plate (5).

5. The centrifugal fan blade structure according to claim 1, characterized in that: Limiting blocks (3) are provided at both ends of the blade (4), and the T-shaped card block (16) is fixedly connected to the limiting block (3).

6. The centrifugal fan blade structure according to claim 1, characterized in that: The cross-sectional dimensions of the limiting insert (14) are the same as those of the through groove (13).

7. The centrifugal fan blade structure according to claim 1, characterized in that: The bottom of the impeller rear disc (2) is fixed with a rotating shaft connection part (11).

8. A centrifugal fan, comprising a fan housing (1) and a centrifugal fan blade structure as described in any one of claims 1-7, characterized in that: The blade structure is located inside the fan casing (1).

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