Efficient centrifugal fan

Abstract

The utility model belongs to the technical field of fans, and particularly relates to an efficient centrifugal fan which comprises a supporting seat. A driving shaft is arranged at the top of the supporting seat; a shell is fixedly connected to the top, located on one side of the driving shaft, of the supporting base. The side wall of the shell is fixedly connected with a connecting pipe; the shell is rotationally connected to the side wall of the shell in a penetrating manner; an impeller slides on the inner wall of the shell; the middle part of the impeller is fixedly connected with a cylindrical pipe; the cylindrical pipe is sleeved on the outer wall of the front end of the driving shaft; the inner wall of the end part of the driving shaft is in contact with a cylindrical shell; a fixing assembly is arranged on the inner wall of the cylindrical shell; the side wall of the cylindrical shell is fixedly connected with a hinge block; through mutual cooperation of the pulling plate, the hinge block, the second sliding groove, the fixing block, the handle and the round rod, when a worker operates, the cylindrical shell can be driven to extrude the driving shaft only by pulling the handle and by means of the lever principle, counter-acting force generated by extrusion can push the impeller and the cylindrical pipe to move together, and therefore the impeller can be rapidly and efficiently disassembled.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically a high-efficiency centrifugal fan. Background Technology

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. They are used in some workshops for ventilation, removing harmful gases, dust and waste heat, introducing fresh air, improving the working environment, and ensuring the health and safety of workers.

[0003] In existing technologies, centrifugal fans are mainly composed of components such as impeller, casing, air inlet, and air outlet. When the motor drives the impeller to rotate, the blades in the impeller push the air to rotate as well, giving the air centrifugal force. Under the action of centrifugal force, the air is thrown out from the center of the impeller to the edge of the impeller, thus forming a low-pressure zone in the center of the impeller. External air continuously enters the center of the impeller under the action of atmospheric pressure, replenishing the thrown-out air. This cycle repeats, realizing continuous air delivery.

[0004] However, to ensure stable impeller rotation, some centrifugal fans typically use an interference fit between the impeller and the rotating shaft, resulting in an extremely tight connection. This means that when disassembling the impeller, even after removing the bolts securing it, workers still need to use other tools to connect to the impeller and gradually push it out. This process is quite cumbersome and greatly reduces the efficiency of impeller replacement and maintenance. Therefore, a high-efficiency centrifugal fan is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background art, this utility model proposes a high-efficiency centrifugal fan.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A high-efficiency centrifugal fan of this utility model includes a support base; a drive shaft is provided at the top of the support base; a housing is fixedly connected to the top of the support base on one side of the drive shaft; a connecting pipe is fixedly connected to the side wall of the housing; the housing is rotatably connected to the side wall of the housing; an impeller slides on the inner wall of the housing; a cylindrical tube is fixedly connected to the middle of the impeller; the cylindrical tube is sleeved on the outer wall of the front end of the drive shaft; the inner wall of the end of the drive shaft contacts the cylindrical shell; a fixing component is provided on the inner wall of the cylindrical shell; a hinge block is fixedly connected to the side wall of the cylindrical shell; a pull plate is hinged to the end of the hinge block; a handle is fixedly connected to the side wall of the pull plate; a fixing block is fixedly connected to the side wall of the cylindrical tube; the pull plate slides in the middle of the fixing block.

[0007] Preferably, the fixing component includes a movable plate; the movable plate is slidably connected to the inner wall of the cylindrical shell; a threaded rod is threadedly connected to the side wall of the movable plate; the threaded rod is rotatably connected to the end of the cylindrical shell; a connecting plate is hinged to the inner wall of the movable plate; a plug rod is hinged to the end of the connecting plate; the plug rod is slidably connected to the side wall of the cylindrical shell; a groove is formed on the inner wall of the end of the drive shaft; the end of the plug rod contacts the inner wall of the groove.

[0008] Preferably, a filter plate is slidably passed through the top of the connecting pipe; a locking block is elastically connected to the inner wall of the top of the filter plate by a spring; the locking block is slidably connected to the inner wall of the top of the filter plate; one end of the spring is fixed to the inner wall of the top of the filter plate; the other end of the spring is fixed to the end of the locking block; a limiting groove is formed on the inner wall of the top of the connecting pipe; the locking block contacts the inner wall of the limiting groove.

[0009] Preferably, a round rod is fixed to the inner wall of the fixing block; a second sliding groove is provided on the top of the pull plate; the round rod slides on the inner wall of the second sliding groove.

[0010] Preferably, the inner wall of the cylindrical shell is provided with a sliding groove; a slider is fixedly connected to the outer wall of the movable plate; the slider is slidably connected to the inner wall of the sliding groove.

[0011] Preferably, the side wall of the card block is provided with a push handle; the top of the filter plate is provided with a through groove; the push handle passes through the through groove and is fixed to the side wall of the card block.

[0012] Preferably, the end of the card block is set as a bevel.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model provides a high-efficiency centrifugal fan. Through the cooperation of the pull plate, hinge block, slide groove, fixing block, handle and round rod, the operator only needs to pull the handle to drive the cylindrical shell to squeeze the drive shaft by lever principle. The reaction force generated by squeezing the drive shaft will cause the impeller and cylindrical tube to move together. In this way, the impeller can be disassembled quickly and efficiently. The whole process does not require other tools, which greatly improves the convenience of operation.

[0015] 2. This utility model provides a high-efficiency centrifugal fan. With the help of the fixed components, the impeller and drive shaft can be quickly limited. Compared with the traditional method of installation by rotating multiple sets of bolts, it can now be achieved by simply rotating the threaded rod, which is both quick and convenient and effectively improves the installation efficiency. In addition, the push handle, locking block, spring, through groove and limiting groove work together to make the disassembly and installation of the filter plate more efficient. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a perspective view of the overall device of this utility model;

[0018] Figure 2 This is a three-dimensional cross-sectional view of the shell and impeller in this utility model;

[0019] Figure 3 This is a three-dimensional sectional view of the connecting pipe and filter plate in this utility model.

[0020] Figure 4 This is a three-dimensional sectional view of the impeller and drive shaft in this utility model.

[0021] Figure 5 This is a three-dimensional, split cross-sectional view of the cylindrical shell and the movable plate in this utility model.

[0022] Figure 6 This utility model Figure 2 A magnified 3D view of region A;

[0023] Figure 7 This utility model Figure 4 A magnified 3D view of region B.

[0024] Legend:

[0025] 1. Support base; 2. Housing; 3. Connecting pipe; 4. Filter plate; 41. Push handle; 42. Locking block; 43. Spring; 44. Through groove; 45. Limiting groove; 5. Impeller; 51. Cylindrical tube; 52. Cylindrical shell; 521. Threaded rod; 522. Moving plate; 523. Sliding block; 524. Insert rod; 525. Connecting plate; 526. Slide groove one; 53. Pull plate; 54. Hinge block; 55. Slide groove two; 56. Fixing block; 57. Handle; 58. Round rod; 6. Drive shaft; 7. Groove. Detailed Implementation

[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Specific implementation examples are given below.

[0028] Please see Figure 1 - Figure 7 This utility model provides a high-efficiency centrifugal fan, including a support base 1; a drive shaft 6 is provided on the top of the support base 1; a housing 2 is fixedly connected to the top of the support base 1 on one side of the drive shaft 6; a connecting pipe 3 is fixedly connected to the side wall of the housing 2; the housing 2 is rotatably connected to the side wall of the housing 2; an impeller 5 slides on the inner wall of the housing 2; a cylindrical tube 51 is fixedly connected to the middle of the impeller 5; the cylindrical tube 51 is sleeved on the outer wall of the front end of the drive shaft 6; the inner wall of the end of the drive shaft 6 contacts a cylindrical shell 52; a fixing component is provided on the inner wall of the cylindrical shell 52; a hinge block 54 is fixedly connected to the side wall of the cylindrical shell 52; a pull plate 53 is hinged to the end of the hinge block 54; a handle 57 is fixedly connected to the side wall of the pull plate 53; a fixing block 56 is fixedly connected to the side wall of the cylindrical tube 51; the pull plate 53 slides in the middle of the fixing block 56. During operation, the impeller 5 is rotated by using the drive shaft 6, and the impeller 5 will blow away the external... Air is drawn into the housing 2 and expelled by centrifugal force. When the impeller 5 needs to be disassembled for cleaning after a period of use, simply contact the fixing component to limit the cylindrical tube 51. Then, hold the handle 57 and pull the pull plate 53. The angle of the pull plate 53 will change, and the side wall of the pull plate 53 will slide on the inner wall of the fixing block 56. The end will rotate with the hinge block 54. It will drive the cylindrical housing 52 and the hinge block 54 to apply pressure to the drive shaft 6 with the middle of the fixing block 56 as the fulcrum. Since the position of the drive shaft 6 is fixed and cannot be moved, and the cylindrical tube 51 is sleeved on the outer wall of the drive shaft 6, the force applied by the cylindrical housing 52 to the drive shaft 6 will react on the cylindrical tube 51, causing the cylindrical tube 51 to slide out from the outer wall of the drive shaft 6. In this way, it is not necessary to use other tools to connect with the impeller 5 and then gradually push the impeller 5 out, improving the disassembly efficiency.

[0029] Furthermore, such as Figure 2 and Figure 5 - Figure 7As shown, the fixing assembly includes a movable plate 522; the movable plate 522 is slidably connected to the inner wall of the cylindrical shell 52; a threaded rod 521 is threadedly connected to the side wall of the movable plate 522; the threaded rod 521 is rotatably connected to the end of the cylindrical shell 52; a connecting plate 525 is hinged to the inner wall of the movable plate 522; an insertion rod 524 is hinged to the end of the connecting plate 525; the insertion rod 524 is slidably connected to the side wall of the cylindrical shell 52; a groove 7 is provided on the inner wall of the end of the drive shaft 6; the end of the insertion rod 524 contacts the inner wall of the groove 7. During operation, when installing the impeller 5, it is only necessary to fit the impeller 5 and the cylindrical tube 51 onto the outer wall of the end of the drive shaft 6. At this time, the cylindrical shell 52 will insert into the inner wall of the end of the drive shaft 6, and when the impeller 5 can no longer be pushed, the insertion rod... 524 has already aligned with the groove 7. At this point, simply rotate the threaded rod 521. The movable plate 522, which is threaded to the outer wall of the threaded rod 521, will move linearly. The connecting plate 525 will rotate with the movable plate 522, and the angle of the connecting plate 525 will also change. The other end of the connecting plate 525 will rotate with the insertion rod 524, driving the insertion rod 524 to move and insert it into the inner wall of the groove 7. This can limit the position between the cylindrical tube 51 and the drive shaft 6 without the need to fix it by rotating multiple sets of bolts. Furthermore, the threaded rod 521 and the movable plate 522 have an axial self-locking characteristic, ensuring a stable connection between the threaded rod 521 and the movable plate 522 when the threaded rod 521 is not rotated, and also ensuring the stability of the movable plate 522.

[0030] Furthermore, such as Figure 1 and Figure 3 As shown, a filter plate 4 slides through the top of the connecting pipe 3; a locking block 42 is elastically connected to the inner wall of the top of the filter plate 4 via a spring 43; the locking block 42 is slidably connected to the inner wall of the top of the filter plate 4; one end of the spring 43 is fixed to the inner wall of the top of the filter plate 4; the other end of the spring 43 is fixed to the end of the locking block 42; a limiting groove 45 is formed on the inner wall of the top of the connecting pipe 3; the locking block 42 contacts the inner wall of the limiting groove 45. During operation, the outside air can be filtered through the filter plate 4. When the filter plate 4 needs to be removed for replacement and cleaning, simply push the push handle 41. The push handle 41 will move the locking block 42. When the locking block 42 moves, it will squeeze the spring 43 until the locking block 42 disengages from the inner wall of the limiting groove 45. At this time, the filter plate 4 can be pulled out. After pulling out, release the push handle 41. At this time, the spring 43 will push the locking block 42 to reset through its own elasticity. The filter plate 4 can be disassembled and replaced without disconnecting the pipe connected to the connecting pipe 3, which improves convenience.

[0031] Furthermore, such as Figure 6 - Figure 7As shown, a round rod 58 is fixed to the inner wall of the fixing block 56; a second sliding groove 55 is provided on the top of the pull plate 53; the round rod 58 slides on the inner wall of the second sliding groove 55. During operation, when the pull plate 53 is pulled, the side wall of the pull plate 53 will slide in the middle of the fixing block 56 to adjust its position. At this time, the round rod 58 will slide in the inner wall of the second sliding groove 55, reducing the risk of the pull plate 53 dislodging from the middle of the fixing block 56, ensuring the stability of the fulcrum, and improving practicality.

[0032] Furthermore, such as Figure 5 As shown, the inner wall of the cylindrical shell 52 is provided with a sliding groove 526; a slider 523 is fixedly connected to the outer wall of the moving plate 522; the slider 523 is slidably connected to the inner wall of the sliding groove 526. When the moving plate 522 moves, it will drive the slider 523 to slide on the inner wall of the sliding groove 526. This can ensure the stability of the linear motion of the moving plate 522 and reduce the risk of torsion.

[0033] Furthermore, such as Figure 3 As shown, the side wall of the card block 42 is provided with a push handle 41; the top of the filter plate 4 is provided with a through groove 44; the push handle 41 passes through the through groove 44 and is fixed to the side wall of the card block 42. When working, the card block 42 can be moved by pushing the push handle 41, and the side wall of the push handle 41 is in contact with the inner wall of the through groove 44, ensuring that the push handle 41 can move stably and improving practicality.

[0034] Furthermore, such as Figure 3 As shown, the end of the locking block 42 is set as an inclined surface. During operation, the inclined surface ensures that when the filter plate 4 is inserted into the interior of the connecting pipe 3, the connecting pipe 3 will push the locking block 42 to move along the inclined surface, so that the locking block 42 is retracted into the middle of the filter plate 4 until the locking block 42 overlaps with the limiting groove 45. At this time, the spring 43 will push the locking block 42 to reset and lock it in the inner wall of the limiting groove 45 through its own elasticity.

[0035] Working principle: The impeller 5 is driven to rotate by the drive shaft 6. The impeller 5 draws in external air into the housing 2 and then discharges the air through centrifugal force. When the impeller 5 needs to be disassembled for cleaning after a period of use, simply contact the limiting component of the cylindrical tube 51. Then, you can hold the handle 57 and pull the pull plate 53. The angle of the pull plate 53 will change, and the side wall of the pull plate 53 will slide on the inner wall of the fixed block 56. The end will rotate between the fixed block 56 and the hinge block 54. It will drive the cylindrical shell 52 and the hinge block 54 to apply pressure to the drive shaft 6 with the middle of the fixed block 56 as the fulcrum. Since the position of the drive shaft 6 is fixed and cannot be moved, and the cylindrical tube 51 is fitted on the outer wall of the drive shaft 6, the force applied by the cylindrical shell 52 to the drive shaft 6 will react on the cylindrical tube 51, causing the cylindrical tube 51 to slide out from the outer wall of the drive shaft 6.

[0036] When installing the impeller 5, simply place the impeller 5 and the cylindrical tube 51 onto the outer wall of the end of the drive shaft 6. At this time, the cylindrical shell 52 will insert into the inner wall of the end of the drive shaft 6. When the impeller 5 can no longer be pushed, the insertion rod 524 will overlap with the groove 7. Then, simply rotate the threaded rod 521. The moving plate 522, which is threaded to the outer wall of the threaded rod 521, will move linearly. The connecting plate 525 will rotate with the moving plate 522, and the angle of the connecting plate 525 will also change. The other end of the connecting plate 525 will rotate with the insertion rod 524, driving the insertion rod 524 to move and insert it into the inner wall of the groove 7. This can limit the position between the cylindrical tube 51 and the drive shaft 6 without the need to fix it by rotating multiple sets of bolts. Furthermore, the threaded rod 521 and the moving plate 522 have an axial self-locking characteristic, ensuring a stable connection between the threaded rod 521 and the moving plate 522 when the threaded rod 521 is not rotated, and also ensuring the stability of the moving plate 522.

[0037] The filter plate 4 can filter the outside air. When the filter plate 4 needs to be removed for replacement and cleaning, simply push the push handle 41. The push handle 41 will move the locking block 42. When the locking block 42 moves, it will squeeze the spring 43 until the locking block 42 disengages from the inner wall of the limiting groove 45. Then the filter plate 4 can be pulled out. After pulling it out, release the push handle 41. At this time, the spring 43 will push the locking block 42 to reset through its own elasticity. The filter plate 4 can be disassembled and replaced without disconnecting the pipe connected to the connecting pipe 3, which improves convenience.

[0038] When the filter plate 4 needs to be installed, the filter plate 4 can be inserted into the inside of the connecting pipe 3. During the insertion process, the connecting pipe 3 will push the block 42 along the inclined surface to move it, so that the block 42 is retracted into the middle of the filter plate 4 and squeezes the spring 43 until the block 42 overlaps with the limiting groove 45. At this time, the spring 43 will push the block 42 to reset and lock it in the inner wall of the limiting groove 45 through its own elasticity.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-efficiency centrifugal fan, comprising a support base (1); characterized in that: The support base (1) is provided with a drive shaft (6) at its top; a housing (2) is fixedly connected to the top of the support base (1) on one side of the drive shaft (6); a connecting pipe (3) is fixedly connected to the side wall of the housing (2); the housing (2) is rotatably connected to the side wall of the housing (2); an impeller (5) slides on the inner wall of the housing (2); a cylindrical tube (51) is fixedly connected to the middle of the impeller (5); the cylindrical tube (51) is sleeved on the outer side of the front end of the drive shaft (6). The inner wall of the drive shaft (6) contacts a cylindrical shell (52); a fixing component is provided on the inner wall of the cylindrical shell (52); a hinge block (54) is fixedly connected to the side wall of the cylindrical shell (52); a pull plate (53) is hinged to the end of the hinge block (54); a handle (57) is fixedly connected to the side wall of the pull plate (53); a fixing block (56) is fixedly connected to the side wall of the cylindrical tube (51); the pull plate (53) slides in the middle of the fixing block (56).

2. The high-efficiency centrifugal fan according to claim 1, characterized in that: The fixing assembly includes a movable plate (522); the movable plate (522) is slidably connected to the inner wall of the cylindrical shell (52); a threaded rod (521) is threadedly connected to the side wall of the movable plate (522); the threaded rod (521) is specifically rotatably connected to the end of the cylindrical shell (52); a connecting plate (525) is hinged to the inner wall of the movable plate (522); a plug rod (524) is hinged to the end of the connecting plate (525); the plug rod (524) is slidably connected to the side wall of the cylindrical shell (52); a groove (7) is provided on the inner wall of the end of the drive shaft (6); the end of the plug rod (524) contacts the inner wall of the groove (7).

3. The high-efficiency centrifugal fan according to claim 2, characterized in that: A filter plate (4) slides through the top of the connecting pipe (3); a locking block (42) is elastically connected to the inner wall of the top of the filter plate (4) by a spring (43); the locking block (42) is slidably connected to the inner wall of the top of the filter plate (4); one end of the spring (43) is fixed to the inner wall of the top of the filter plate (4); the other end of the spring (43) is fixed to the end of the locking block (42); a limiting groove (45) is opened on the inner wall of the top of the connecting pipe (3); the locking block (42) contacts the inner wall of the limiting groove (45).

4. The high-efficiency centrifugal fan according to claim 1, characterized in that: A round rod (58) is fixed to the inner wall of the fixing block (56); a second sliding groove (55) is provided on the top of the pull plate (53); the round rod (58) slides on the inner wall of the second sliding groove (55).

5. A high-efficiency centrifugal fan according to claim 2, characterized in that: The inner wall of the cylindrical shell (52) is provided with a sliding groove (526); the outer wall of the movable plate (522) is fixedly connected with a slider (523); the slider (523) is slidably connected to the inner wall of the sliding groove (526).

6. A high-efficiency centrifugal fan according to claim 3, characterized in that: The side wall of the card block (42) is provided with a push handle (41); the top of the filter plate (4) is provided with a through groove (44); the push handle (41) passes through the through groove (44) and is fixed to the side wall of the card block (42).

7. A high-efficiency centrifugal fan according to claim 3, characterized in that: The end of the card block (42) is set as a bevel.

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