Impeller structure of multi-wing centrifugal fan

Abstract

The utility model discloses an impeller structure of a multi-wing centrifugal fan, which comprises a mounting seat, a driving shaft, a driven shaft, a fan shell and an impeller body, the impeller body is rotatably mounted in the fan shell, a fixed cylinder is fixedly mounted on the impeller body, and one end of the driven shaft is fixedly connected with a fixed block; a fixing sleeve is fixedly connected to the outer side of the fixing cylinder, a cavity is formed in the fixing sleeve, a plurality of clamping rods arranged in an annular array are slidably installed on the fixing cylinder, and the end, penetrating through the fixing cylinder, of each clamping rod is connected with the fixing block in a clamped mode. The impeller has the advantages that the impeller body can be disassembled and assembled by enabling the rotating sleeve to rotate by a small angle, operation is rapid and convenient, consumed time is short, the replacement efficiency of the impeller body is high, and rapid replacement of the impeller is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to an impeller structure of a multi-wing centrifugal fan. Background Art

[0002] With the continuous development of society and the continuous progress of technology, the technology related to centrifugal fans is also constantly improving. Centrifugal fans include many types, among which there is a multi-wing centrifugal fan, which is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas.

[0003] At present, when the impeller on a multi-wing centrifugal fan is damaged, it is necessary to first remove a plurality of bolts to disassemble and replace the impeller. The operation is relatively cumbersome and inconvenient, consuming a long time, resulting in a low replacement efficiency of the impeller and being unfavorable for the quick replacement of the impeller. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the following disadvantages in the prior art, and to propose an impeller structure of a multi-wing centrifugal fan.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An impeller structure of a multi-wing centrifugal fan, including a mounting seat, a driving shaft, a driven shaft, a fan housing and an impeller body. The impeller body is rotatably installed inside the fan housing. A fixed cylinder is fixedly installed on the impeller body. One end of the driven shaft is fixedly connected with a fixed block; a fixed sleeve is fixedly connected to the outside of the fixed cylinder. A cavity is formed inside the fixed sleeve. A plurality of clamping rods arranged in a circular array are slidably installed on the fixed cylinder. One end of each clamping rod passing through the fixed cylinder is clamped with the fixed block. One end of each clamping rod is fixedly connected with a rectangular plate. A plurality of pressing pieces are rotatably installed on the inner wall of the cavity. A rotating assembly is arranged on the fixed sleeve. The rotating assembly includes a rotating sleeve threadedly connected to the fixed sleeve, and a plurality of pressing rods are fixedly connected inside the rotating sleeve.

[0007] In order to better achieve the above purpose, the utility model adopts a further technical scheme: a first spring is sleeved on each clamping rod. One end of the first spring is fixedly connected with the clamping rod, and the other end of the first spring is fixedly connected with the outer surface of the fixed cylinder.

[0008] In order to better achieve the above purpose, the utility model adopts a further technical scheme: a torsion spring is sleeved on each pressing piece. One end of the torsion spring is fixedly connected with the pressing piece, and the other end of the torsion spring is fixedly connected with the inner wall of the cavity.

[0009] To better achieve the above object, the present utility model adopts the following further technical solution: One end of each of the extrusion sheets is in contact with the surface of the corresponding rectangular plate, and the surface of each of the extrusion rods is in fit with the surface of the corresponding extrusion sheet.

[0010] To better achieve the above object, the present utility model adopts the following further technical solution: A circular plate is fixedly connected to the fixed block, a plurality of positioning rods are fixedly connected to one side of the circular plate, and a plurality of positioning holes for connecting the positioning rods are formed in the fixed cylinder.

[0011] Preferably, transmission wheels are fixedly connected to both the driving shaft and the driven shaft, and the two transmission wheels are connected by a transmission belt.

[0012] The advantages of the present utility model are as follows: By rotating the rotating sleeve by thirty degrees, each of the extrusion rods will gradually rotate against the surface of the corresponding inclined extrusion sheet, and the end of the extrusion sheet will move against the surface of the corresponding rectangular plate. Under the transmission action of the rectangular plate, each of the clamping rods will be respectively clamped with each of the clamping grooves on the fixed block, realizing the firm installation of the impeller body. When the impeller body is damaged, it is convenient to quickly replace it. Only by rotating the rotating sleeve by a small angle, the disassembly and installation of the impeller body can be realized. The operation is relatively fast and convenient, consuming less time, so that the replacement efficiency of the impeller body is relatively high, which is beneficial to the quick replacement of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. 1 is a front structural schematic diagram of an impeller structure of a multi-wing centrifugal fan proposed by the present utility model;

[0014] Figure 2 FIG. 2 is a back structural schematic diagram of an impeller structure of a multi-wing centrifugal fan proposed by the present utility model;

[0015] Figure 3 FIG. 3 is a partial sectional structural schematic diagram of a fixed cylinder and a fixed sleeve in the present utility model;

[0016] Figure 4 FIG. Figure 3 is a partial enlarged view of A in FIG.

[0017] In the figures: 1 mounting seat, 2 fan housing, 3 impeller body, 4 rotating sleeve, 5 fixed cylinder, 6 circular plate, 7 fixed block, 8 driven shaft, 9 positioning rod, 10 extrusion rod, 11 rectangular plate, 12 clamping rod, 13 cavity, 14 fixed sleeve, 15 first spring, 16 extrusion sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model.

[0019] Refer to Figures 1-4 As shown, an impeller structure of a multi-wing centrifugal fan includes a mounting seat 1, a driving shaft, a driven shaft 8, a fan housing 2, and an impeller body 3. The impeller body 3 is rotatably installed inside the fan housing 2. A fixed cylinder 5 is fixedly installed on the impeller body 3. One end of the driven shaft 8 is fixedly connected to a fixed block 7. A fixed sleeve 14 is fixedly connected to the outside of the fixed cylinder 5. A cavity 13 is formed inside the fixed sleeve 14. A plurality of clamping rods 12 arranged in a circular array are slidably installed on the fixed cylinder 5. One end of each clamping rod 12 passing through the fixed cylinder 5 is clamped with the fixed block 7. One end of each clamping rod 12 is fixedly connected to a rectangular plate 11. A plurality of pressing pieces 16 are rotatably installed on the inner wall of the cavity 13. A rotating assembly is arranged on the fixed sleeve 14. The rotating assembly includes a rotating sleeve 4 threadedly connected to the fixed sleeve 14, and a plurality of pressing rods 10 are fixedly connected inside the rotating sleeve 4.

[0020] One end of each pressing piece 16 contacts the surface of the corresponding rectangular plate 11. The surface of each pressing rod 10 fits with the surface of the corresponding pressing piece 16. A first spring 15 is sleeved on each clamping rod 12. One end of the first spring 15 is fixedly connected to the clamping rod 12, and the other end of the first spring 15 is fixedly connected to the outer surface of the fixed cylinder 5. During the rotation of the pressing piece 16, one end of it will move against the surface of the corresponding rectangular plate 11. Under the driving action of the rectangular plate 11, the clamping rod 12 will extend into the fixed cylinder 5, and the first spring 15 will deform.

[0021] A torsion spring is sleeved on each pressing piece 16. One end of the torsion spring is fixedly connected to the pressing piece 16, and the other end of the torsion spring is fixedly connected to the inner wall of the cavity 13. During the rotation of each pressing rod 10, it will gradually rotate against the surface of the corresponding inclined pressing piece 16, so that the pressing piece 16 and the fixed sleeve 14 rotate relative to each other, and the torsion spring deforms.

[0022] A circular plate 6 is fixedly connected to the fixed block 7. A plurality of positioning rods 9 are fixedly connected to one side of the circular plate 6. A plurality of positioning holes for connecting the positioning rods 9 are formed on the fixed cylinder 5. When the impeller body 3 is installed inside the fan housing 2, one end of the fixed block 7 will be inserted into the fixed cylinder 5. At this time, each positioning rod 9 is inserted into the corresponding positioning hole.

[0023] Driving wheels are fixedly connected to both the driving shaft and the driven shaft 8. The two driving wheels are connected by a transmission belt. A motor is arranged on the mounting seat 1. The driving end of the motor is fixedly connected to the driving shaft. During the rotation of the driving shaft, under the driving action of the two driving wheels (not shown) and the transmission belt (not shown), the driven shaft 8 can rotate together.

[0024] When the utility model is installed, first install the impeller body 3 inside the fan housing 2, and insert one end of the fixing block 7 into the fixing cylinder 5. At this time, each positioning rod 9 is inserted into the corresponding positioning hole. Then, rotate the rotating sleeve 4 by thirty degrees. The rotating sleeve 4 rotates relative to the fixing cylinder 5. During the rotation of the rotating sleeve 4, it will be threadedly connected to the fixing sleeve 14. The lengths of the plurality of pressing rods 10 are sufficient, and at the initial state, one end of each pressing piece 16 is in contact with the surface of the corresponding rectangular plate 11. Each pressing piece 16 is inclined. During the rotation of each pressing rod 10, it will gradually rotate against the surface of the corresponding inclined pressing piece 16, so that the pressing piece 16 rotates relative to the fixing sleeve 14, and the torsion spring deforms. During the rotation of the pressing piece 16, one end of it will move against the surface of the corresponding rectangular plate 11. Under the transmission of the rectangular plate 11, the clamping rod 12 will extend into the fixing cylinder 5 until each clamping rod 12 is respectively clamped with each clamping groove on the fixing block 7, which can effectively prevent the fixing cylinder 5 and the fixing block 7 from rotating relative to each other, realizing the firm installation of the impeller body 3. Similarly, when the impeller body 3 is damaged, it is convenient to quickly replace it. Only by making a small rotation of the rotating sleeve 4, the disassembly and installation of the impeller body 3 can be realized. The operation is relatively fast and convenient, consuming less time, so that the replacement efficiency of the impeller body 3 is relatively high, which is beneficial to the quick replacement of the impeller.

Claims

1. An impeller structure of a multi-blade centrifugal fan, comprising a mounting seat (1), a driving shaft, a driven shaft (8), a fan housing (2) and an impeller body (3), characterized in that: The impeller body (3) is rotatably mounted inside the fan housing (2); a fixed cylinder (5) is fixedly mounted on the impeller body (3); one end of the driven shaft (8) is fixedly connected to a fixed block (7); a fixed sleeve (14) is fixedly connected to the outer side of the fixed cylinder (5); a cavity (13) is provided in the fixed sleeve (14); a plurality of clamping rods (12) arranged in an annular array are slidably mounted on the fixed cylinder (5); one end of each clamping rod (12) passes through the fixed cylinder (5) and is clamped to the fixed block (7); one end of each clamping rod (12) is fixedly connected to a rectangular plate (11); a plurality of extrusion sheets (16) are rotatably mounted on the inner wall of the cavity (13); a rotating assembly is provided on the fixed sleeve (14); the rotating assembly comprises a rotating sleeve (4) threadedly connected to the fixed sleeve (14); a plurality of extrusion rods (10) are fixedly connected in the rotating sleeve (4).

2. The impeller structure of a multi-blade centrifugal fan according to claim 1, characterized in that Each of the clamping rods (12) is sleeved with a first spring (15), one end of the first spring (15) is fixedly connected to the clamping rod (12), and the other end of the first spring (15) is fixedly connected to the outer surface of the fixing tube (5).

3. The impeller structure of a multi-blade centrifugal fan according to claim 1, characterized in that: A torsion spring is sleeved on each of the extrusion sheets (16), one end of the torsion spring is fixedly connected to the extrusion sheet (16), and the other end of the torsion spring is fixedly connected to the inner wall of the cavity (13).

4. The impeller structure of a multi-blade centrifugal fan according to claim 1, characterized in that: One end of each of the extrusion sheets (16) contacts the surface of the corresponding rectangular plate (11), and the surface of each of the extrusion rods (10) fits the surface of the corresponding extrusion sheet (16).

5. The impeller structure of a multi-blade centrifugal fan according to claim 1, characterized in that: A circular plate (6) is fixedly connected to the fixed block (7), a plurality of positioning rods (9) are fixedly connected to one side of the circular plate (6), and a plurality of positioning holes for connecting the positioning rods (9) are provided on the fixed cylinder (5).

6. The impeller structure of a multi-blade centrifugal fan according to claim 1, characterized in that: The driving shaft and the driven shaft (8) are both fixedly connected with a transmission wheel, and the two transmission wheels are connected via a transmission belt.

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