Centrifugal fan shaft

Abstract

The utility model belongs to the field of centrifugal fans, and particularly relates to a centrifugal fan shaft which comprises a base plate, a main shaft is rotatably mounted in the middle of the base plate through a bearing, an end cover is fixedly arranged at the position, on the outer side of the main shaft, of the top of the base plate, and a cover plate is mounted at the top of the end cover. The main shaft penetrates through middle mounting holes of the end cover and the cover plate; a felt ring and a sealing ring are respectively sleeved outside the main shaft in the end cover; a connecting assembly is arranged on the cover plate, and the cover plate is fixed above the end cover through the connecting assembly; according to the utility model, the cover plate can be quickly and fixedly mounted above the end cover by arranging the connecting assembly, the fixing work can be completed only by rotating the rotating plate, the operation is simple, and the mounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal fans, in particular to a centrifugal fan shaft. Background Art

[0002] A centrifugal fan is a fluid machine that converts mechanical energy into gas pressure energy and uses it to transport the gas. Composed of a casing and a centrifugal impeller, a centrifugal fan boasts high air volume, stable performance, and smooth rotation. It is widely used in the chemical industry, metallurgy, electric power, factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling; in boilers and industrial furnaces for ventilation and draft control; in air conditioning equipment and household appliances for cooling and ventilation; and in grain drying and conveying. Centrifugal fans use input mechanical energy to increase gas pressure and discharge the gas.

[0003] The utility model disclosed in the prior art as CN215830785U discloses a centrifugal fan shaft, belonging to the technical field of centrifugal fans. The utility model includes a main shaft. By connecting a gland rib to an end cap, a protrusion is caused to squeeze a felt ring and a sealing gasket, thereby improving the centering and uniformity of the felt ring during compression. A bearing is provided to facilitate smooth rotation of the main shaft within a chassis. A threaded groove is provided to prevent a portion of oil from flowing out along the main shaft during rotation. An elastic groove is provided to allow the felt ring and the sealing gasket to fit tightly with the main shaft and the elastic groove without leaving any gaps. The mutual cooperation between the felt ring and the sealing gasket improves the sealing performance of the device, preventing oil leakage during rotation of the main shaft. The gland rib facilitates replacement of the felt ring and the sealing gasket. When the felt ring, the sealing gasket, and the wear-resistant sealing disc need to be replaced, the screw drives the fixed block upward until the fixed block is separated from the fixed groove, thereby separating the end cap from the gland rib, thereby achieving an effect of facilitating replacement.

[0004] However, when the above device is in use, the screws that are too close to each other make it inconvenient for the staff to drive them to rotate to complete the disassembly work. In addition, the screws on both sides need to be rotated separately to complete the disassembly work, which is relatively cumbersome. Therefore, a centrifugal fan shaft is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology and solve the problem that the screws in the above device are too close to each other and it is not convenient for the staff to drive them to rotate to complete the disassembly work. In addition, the screws on both sides need to be rotated separately to complete the disassembly work, which is a relatively cumbersome operation, the utility model proposes a centrifugal fan shaft.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows: a centrifugal fan shaft of the utility model comprises a chassis, a main shaft is rotatably mounted in the middle of the chassis through a bearing, an end cover is fixedly arranged on the top of the chassis on the outside of the main shaft, a cover plate is installed on the top of the end cover, the main shaft passes through the mounting hole between the end cover and the cover plate, and a felt ring and a sealing ring are respectively sleeved on the outside of the main shaft inside the end cover;

[0007] The top of the lockhole that is formed on the upper part of the lockhole is formed on the upper part of the lockhole, and the lockhole engages with the upper part of the lockhole to stop the lockhole engagement. The lockhole engages with the lower part of the lockhole to stop the lockhole engagement.

[0008] Preferably, the side wall of the extrusion block fits in contact with the inner wall of the cavity inside the insert block.

[0009] Preferably, a plurality of anti-slip grooves are evenly arranged on the side wall of the rotating plate.

[0010] Preferably, baffles are fixedly installed on the bottom of the blocks on both sides, and a second spring is installed between the baffles and the inner wall of the cavity inside the plug block.

[0011] Preferably, a guide rod is fixedly installed at the bottom of the inner cavity of the insert block, the baffle is slidably sleeved on the guide rod, and the spring is sleeved on the guide rod.

[0012] Preferably, both ends of the guide rod are respectively threadedly connected to threaded holes provided on the side walls of the inner cavity of the insert block.

[0013] Preferably, a groove is provided at the bottom of the baffle, and the guide rod is engaged in the groove.

[0014] The utility model is beneficial in that:

[0015] The locking plate is locked in position when the locking plate is engaged, and the locking plate is locked in position when the locking plate is engaged.

[0016] 2. The two ends of the guide rod of the utility model are respectively threadedly connected to the threaded holes provided on the side walls of the internal cavity of the insert block; when working, the guide rod can be removed from the insert block by continuously rotating the guide rod in one direction, which is also convenient for installation, thereby facilitating the quick installation and removal of the card block and spring 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0019] Figure 2 It is a partial cross-sectional view of Example 1;

[0020] Figure 3 For Example 1 Figure 2 A schematic diagram of the structure at center A;

[0021] Figure 4 For Example 1 Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0022] Figure 5 This is a schematic structural diagram of the groove in Example 2.

[0023] In the figure: 1. chassis; 2. main shaft; 3. end cover; 4. cover plate; 5. rotating plate; 6. felt ring; 7. sealing ring; 8. through groove; 9. abutment ring; 10. connecting plate; 11. spring 1; 12. connecting rod; 13. slot; 14. insert block; 15. through hole; 16. slot; 17. block; 18. extrusion block; 19. guide rod; 20. baffle; 21. spring 2; 22. groove. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1

[0026] See also Figure 1-4 As shown, a centrifugal fan shaft includes a chassis 1, a main shaft 2 is rotatably mounted in the middle of the chassis 1 through a bearing, an end cover 3 is fixedly provided on the top of the chassis 1 on the outside of the main shaft 2, a cover plate 4 is installed on the top of the end cover 3, the main shaft 2 passes through the mounting hole between the end cover 3 and the cover plate 4, and a felt ring 6 and a sealing ring 7 are respectively sleeved on the outside of the main shaft 2 inside the end cover 3;

[0027] The cover plate 4 is provided with a connecting component, through which the cover plate 4 is fixed above the end cover 3. The connecting component includes an insert block 14, two of which are symmetrically arranged on both sides of the bottom of the cover plate 4. Slots 13 are provided at corresponding positions on both sides of the top of the end cover 3. Blocks 17 are symmetrically installed on both sides of the internal cavity of the end cover 3. The block 17 is slidably arranged in a through hole 15 opened on the side of the insert block 14. A card groove 16 adapted to the block 17 is provided on the side wall of the slot 13. An extrusion block is slidably installed on the upper part of the cavity. 18, the extrusion block 18 presses the lower block 17 to move to both sides, the top of the extrusion block 18 is fixedly installed with a connecting rod 12, the end of the connecting rod 12 slides upward and extends through the active cavity opened in the cover plate 4, the top of the connecting rod 12 is fixedly connected to the connecting plate 10, and the bottom of the connecting plate 10 is fixedly installed with a spring 11, the top of the active cavity is provided with an annular groove 8, the middle of the groove 8 is installed with an abutment ring 9, the abutment ring 9 is threadedly connected to the groove 8, and the top of the abutment ring 9 is fixedly connected to the rotating plate 5;

[0028] During operation, the sealing effect of the main shaft 2 is achieved by using the felt ring 6 and the sealing ring 7. The cover plate 4 is used to cover the gasket and the sealing ring 7 in the end cover 3. When assembling and using the cover plate 4, the upper end of the main shaft 2 is passed through the middle mounting hole of the cover plate 4, and then the cover plate 4 is buckled, and the plug 14 at the bottom of the cover plate 4 is inserted into the slot 13. Then, by rotating the rotating plate 5, the rotating plate 5 drives the abutment ring 9 to rotate. Since the abutment ring 9 is threadedly connected to the inner wall of the through groove 8, the abutment ring 9 is gradually moved downward and squeezed the connecting plate 10 and the connecting rod 12, so that the extrusion block 18 moves downward. The two sides of the bottom of the extrusion block 18 are set to be inclined. The relative sides of the blocks 17 on both sides are set to be inclined, and the two sides of the bottom end of the extrusion block 18 are respectively fitted with the inclined surfaces of the blocks 17. When the extrusion block 18 moves downward, it can press the blocks 17 on the lower sides to move toward the outside of the through hole 15, so that the blocks 17 are clamped in the grooves 16 on the inner wall of the slot 13, which makes it easy to stably restrict the insert block 14 in the slot 13, thereby stably installing the cover plate 4 above the end cover 3; the abutment ring 9 can simultaneously squeeze the connecting plates 10, connecting rods 12 and extrusion blocks 18 on both sides to move, and then the insert blocks 14 on both sides can be fixed in the slot 13 at the same time, which is simple to operate and improves installation efficiency.

[0029] The side wall of the extrusion block 18 fits with the inner wall of the internal cavity of the insert block 14; when working, the movement direction of the extrusion block 18 is limited so that the extrusion block 18 can only move linearly along the internal cavity of the insert block 14, thereby enabling the extrusion block 18 to stably cooperate with the clamping block 17.

[0030] A plurality of anti-skid grooves are evenly arranged on the side wall of the rotating plate 5 ; during operation, the rotating plate 5 is prevented from slipping when being rotated, and the rotating plate 5 is easily rotated.

[0031] Baffles 20 are fixedly installed at the bottom of the blocks 17 on both sides, and springs 21 are installed between the baffles 20 and the inner wall of the internal cavity of the plug-in block 14; when working, the springs 21 push the baffles 20 toward the middle of the internal cavity of the plug-in block 14, so that the end of the block 17 is retracted into the through hole 15 before the plug-in block 14 is inserted into the slot 13, and will not block the plug-in block 14 from being inserted into the slot 13, so that the plug-in block 14 can be completely inserted into the slot 13; in addition, the spring 11 pulls the connecting plate 10, the connecting rod 12 and the extrusion block 18, so that the bottom of the extrusion block 18 is always in contact with the inclined surface of the block 17, so that the block 17 can be limited in the horizontal direction, so that the block 17 always remains inside the through hole 15.

[0032] A guide rod 19 is fixedly installed at the bottom of the internal cavity of the insert block 14, the baffle 20 is slidably sleeved on the guide rod 19, and the spring 21 is sleeved on the guide rod 19; when working, the spring 21 is limited by setting the guide rod 19, so that the installation of the spring 21 is more stable.

[0033] The two ends of the guide rod 19 are respectively threadedly connected to the threaded holes provided on the side walls of the internal cavity of the insert block 14; during operation, the guide rod 19 can be removed from the insert block 14 by continuously rotating the guide rod 19 in one direction, which is also convenient for installation, thereby facilitating quick installation and removal of the block 17 and the spring 21.

[0034] Example 2

[0035] See also Figure 5 As shown, compared with Example 1, as another embodiment of the present invention, a groove 22 is provided at the bottom of the baffle 20, and the guide rod 19 is engaged in the groove 22; when working, the block 17 is slid inward so that the end of the block 17 is completely received in the cavity, and then the block 17 is rotated around the guide rod 19 to remove the block 17, which is also convenient for assembling the block 17.

[0036] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A centrifugal fan shaft, characterized in that: The invention comprises a chassis (1), a main shaft (2) is rotatably mounted in the middle of the chassis (1) via a bearing, an end cover (3) is fixedly mounted on the top of the chassis (1) on the outside of the main shaft (2), a cover plate (4) is mounted on the top of the end cover (3), the main shaft (2) passes through the mounting hole between the end cover (3) and the cover plate (4), and a felt ring (6) and a sealing ring (7) are respectively sleeved on the outside of the main shaft (2) inside the end cover (3); The cover plate (4) is provided with a connecting assembly, and the cover plate (4) is fixed on the top of the end cover (3) by the connecting assembly. The connecting assembly includes an insert block (14), and the insert block (14) is provided with two and symmetrically arranged on both sides of the bottom of the cover plate (4). Slots (13) are provided at corresponding positions on both sides of the top of the end cover (3). Card blocks (17) are symmetrically installed on both sides of the internal cavity of the end cover (3). The card blocks (17) are slidably arranged in the through holes (15) provided on the sides of the insert block (14). The side wall of the slot (13) is provided with a card slot (16) adapted to the card block (17). An extrusion block (17) is slidably installed on the upper part of the cavity. 8), the extrusion block (18) presses the lower block (17) to move to both sides, a connecting rod (12) is fixedly installed on the top of the extrusion block (18), the end of the connecting rod (12) slides upward and extends through the movable cavity opened in the cover plate (4), the top of the connecting rod (12) is fixedly connected to the connecting plate (10), the bottom of the connecting plate (10) is fixedly installed with a spring (11), the top of the movable cavity is provided with an annular groove (8), the middle of the groove (8) is provided with an abutment ring (9), the abutment ring (9) is threadedly connected to the groove (8), and the top of the abutment ring (9) is fixedly connected to the rotating plate (5).

2. A centrifugal fan shaft according to claim 1, characterized in that: The side wall of the extrusion block (18) is in contact with the inner wall of the cavity inside the insertion block (14).

3. The centrifugal fan shaft according to claim 2, characterized in that: A plurality of anti-slip grooves are evenly arranged on the side wall of the rotating plate (5).

4. A centrifugal fan shaft according to claim 3, characterized in that: Baffles (20) are fixedly installed at the bottom of the clamping blocks (17) on both sides, and a second spring (21) is installed between the baffles (20) and the inner wall of the inner cavity of the inserting block (14).

5. The centrifugal fan shaft according to claim 4, characterized in that: A guide rod (19) is fixedly installed at the bottom of the inner cavity of the insert block (14), the baffle (20) is slidably sleeved on the guide rod (19), and the second spring (21) is sleeved on the guide rod (19).

6. The centrifugal fan shaft according to claim 5, characterized in that: The two ends of the guide rod (19) are respectively threadedly connected to threaded holes provided on the side walls of the inner cavity of the insert block (14).

7. The centrifugal fan shaft according to claim 6, characterized in that: A groove (22) is provided at the bottom of the baffle (20), and the guide rod (19) is engaged in the groove (22).

Images