Sealing mechanism between fan impeller and air inlet

Abstract

The sealing mechanism comprises a machining table and a filling cover, a vertical frame is fixedly installed at the top of the machining table in the length direction, a transverse frame is arranged at the top of the vertical frame, a threaded rod is rotatably installed in the middle of the transverse frame, a rotating wheel is fixedly installed at the top end of the threaded rod, and a sleeve is in threaded connection with the outer surface of the bottom end of the threaded rod. A pressing base plate is fixedly installed on the lower surface of the sleeve, a filling cover is arranged below the pressing base plate, a filling groove is formed in the middle of the filling cover, the filling groove is filled with graphite packing, a gland used for pressing and fixing is arranged on the top of the filling cover, and the filling cover and the gland are installed through bolts. By arranging the structures such as the pressing base plate, after the filling cover and the corresponding gland are limited by utilizing the structures such as the clamping piece and the like, the filling cover and the corresponding gland can be pressed by utilizing the structures such as the pressing base plate and the like, so that the labor force is liberated, and a more uniform and stable pressing treatment effect can be provided.

Description

Technical Field

[0001] This utility model relates to the field of fan sealing technology, and more specifically, to a sealing mechanism between a fan impeller and an air inlet. Background Technology

[0002] A centrifugal fan is a mechanical device that uses a high-speed rotating impeller to generate centrifugal force to transport gas. The gas enters the impeller from the axial air inlet, is thrown out radially under the action of centrifugal force, is collected and pressurized by the volute, and is discharged from the air outlet.

[0003] Currently, to effectively prevent media leakage or air infiltration during fan operation, the connection between the fan shaft and the casing is typically sealed. Using graphite packing as a sealing material is a widely used method. However, this sealing method has certain limitations in practice. Specifically, when performing the packing seal, operators need to cut the graphite packing and insert it into the sealing gland. After packing, the gland is tightened evenly and then secured with bolts. However, during this process, the operator's hands are occupied while applying pressure to the gland, making it difficult to simultaneously perform bolt installation or other auxiliary operations. Often, assistance from other personnel is required to complete the subsequent work. This operational inconvenience not only reduces work efficiency but may also affect the final sealing effect. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a sealing mechanism between the impeller and the air inlet of a fan, so as to solve the problem that in the prior art, some fan main shaft seals often use graphite packing, but during installation, the pressure cap needs to be pressed by both hands, which makes it impossible to tighten the bolts at the same time, thus affecting the sealing efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a sealing mechanism between a fan impeller and an air inlet, comprising...

[0006] A processing table, wherein a vertical frame is fixedly installed at the top along the length direction of the processing table, a horizontal frame is provided at the top of the vertical frame, a screw is rotatably installed in the middle of the horizontal frame, a rotating wheel is fixedly installed at the top of the screw, a sleeve is threadedly connected to the outer surface of the bottom end of the screw, and a pressure pad is fixedly installed on the lower surface of the sleeve.

[0007] A filling cap is provided below the pressure plate. A filling groove is provided in the middle of the filling cap. Graphite packing is filled inside the filling groove. A pressure cap for pressing and fixing is provided on the top of the filling cap. The filling cap is installed with pressure cap bolts.

[0008] A connecting plate is fixedly installed on the outer surface of the bottom end of the sleeve, and a limit rod is fixedly installed on the upper surface of both ends of the connecting plate. The outer surfaces of the two limit rods are slidably sleeved with the inner surface of the cross frame.

[0009] The vertical frame has fixed blocks on its top surfaces, and the outer surfaces of the fixed blocks are slidably installed on the inner surfaces of the horizontal frame. The horizontal frame has slots at both ends, and the vertical frame has snap-fit ​​mechanisms on its top surfaces away from the fixed blocks.

[0010] The locking mechanism includes a cover box, the outer surface of which is fixedly installed on the inner wall of the side of the vertical frame. A movable rod is slidably sleeved on the inner surface of the cover box. A spring is provided between the movable rod and the cover box. The two ends of the spring are fixedly connected to the side of the cover box and the surface of the end of the movable rod, respectively. The end of the movable rod is sleeved on the inner wall of the side of the vertical frame and the inner surface of the slot.

[0011] The upper surface of the middle part of the processing table is fixedly installed with a housing, the top of the housing is fixedly sleeved with a fixing plate, and four sliders are slidably installed on the inner surface of the fixing plate. Each of the four sliders has a clamp fixedly installed on its upper surface and a connecting rod fixedly installed on its lower surface.

[0012] An adjusting plate is rotatably mounted on the inner surface of the bottom of the housing. The adjusting plate has four guide grooves inside. The inner surface of the guide grooves is movably sleeved with the outer surface of the connecting rod. A toothed ring is fixedly mounted on the side edge of the adjusting plate. A gear meshes with the outer edge of the toothed ring. A motor is mounted on the top of the gear. The output end of the motor is fixedly sleeved with the middle part of the gear, and its outer surface is fixedly mounted with the inner surface of the housing.

[0013] The four sliders, four clamps, four connecting rods, and four guide slots are all arranged in a circle about the center of the connecting rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In the above scheme, by setting up structures such as pressure plates, and after using clamps and other structures to limit the filling cap and the corresponding pressure cap, the rotating wheel can be rotated to drive the screw fixedly connected at the bottom to rotate along the inner wall of the middle of the cross frame. The sleeve threaded to the outer surface of the screw will move downward along the outer surface of the screw, pushing the pressure plate fixedly connected to the lower surface of the sleeve and the connecting plate fixedly installed at the bottom to gradually move downward, so that the limiting rods connected to the upper surfaces of both ends of the connecting plate move downward along the inner surface of the cross frame to limit them, until the pressure plate presses on the top of the filling cap and the corresponding pressure cap, so that the two are in a suitable compressed state. After that, the filling cap and the corresponding pressure cap can be connected with bolts, thereby using the pressure plate and other structures to assist in the pressing operation of the filling cap and the corresponding pressure cap, freeing up labor and providing a more uniform and stable pressing effect.

[0016] In the above solution, by setting up structures such as clamps, when fixing the filling cap and corresponding pressure cap filled with graphite packing, the filling cap and filling groove can be combined and placed on the top of the fixing plate. Then, the motor drives the gear to rotate, which drives the meshing gear ring and the adjusting plate fixed to the gear ring to rotate along the inner wall of the bottom of the housing. The clamps are pulled to move through the linkage and other structures, so that the clamps limit the side edges of the filling cap and pressure cap. By controlling the rotation direction and angle of the motor, it is convenient to quickly clamp and disassemble filling caps of different specifications. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the filling cover, filling groove, vertical frame, and horizontal frame of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the fixed block, cover box, spring, movable rod, etc. of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the clamping plate, slider, connecting rod, adjusting plate, etc. of this utility model.

[0021] [Figure Labels]

[0022] 1. Processing table; 2. Filling cover; 3. Filling groove; 4. Vertical frame; 5. Horizontal frame; 6. Rotary wheel; 7. Screw; 8. Sleeve; 9. Pressure pad; 10. Connecting plate; 11. Limiting rod; 12. Fixing block; 13. Cover box; 14. Spring; 15. Movable rod; 16. Slot; 17. Housing; 18. Fixing plate; 19. Clamping piece; 20. Slider; 21. Connecting rod; 22. Adjusting plate; 23. Gear ring; 24. Gear; 25. Motor; 26. Guide groove. Detailed Implementation

[0023] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0024] As attached Figure 1 To be continued Figure 4 An embodiment of this utility model provides a sealing mechanism between a fan impeller and an air inlet, including...

[0025] A processing table 1 has a vertical frame 4 fixedly installed at the top along its length. A horizontal frame 5 is set at the top of the vertical frame 4. A screw 7 is rotatably installed in the middle of the horizontal frame 5. A rotating wheel 6 is fixedly installed at the top of the screw 7. A sleeve 8 is threadedly connected to the outer surface of the bottom end of the screw 7. A pressure pad 9 is fixedly installed on the lower surface of the sleeve 8.

[0026] The filling cover 2 is located below the pressure plate 9. The filling cover 2 has a filling groove 3 in the middle. The filling groove 3 is filled with graphite packing. The top of the filling cover 2 is provided with a pressure cover for pressing and fixing. The filling cover 2 is installed with the pressure cover bolt.

[0027] Among them, a connecting plate 10 is fixedly installed on the outer surface of the bottom end of the sleeve 8, and a limit rod 11 is fixedly installed on the upper surface of both ends of the connecting plate 10. The outer surface of the two limit rods 11 is slidably sleeved with the inner surface of the cross frame 5.

[0028] Among them, the top surfaces of the vertical frame 4 are fixedly installed with fixing blocks 12, the outer surface of the fixing blocks 12 is slidably installed with the inner surfaces of both sides of the horizontal frame 5, the two ends of the side of the horizontal frame 5 are provided with slots 16, and the top side of the vertical frame 4 away from the fixing blocks 12 is provided with a snap-fit ​​mechanism.

[0029] The snap-fit ​​mechanism includes a cover box 13, the outer surface of which is fixedly installed on the inner wall of the side of the vertical frame 4. A movable rod 15 is slidably sleeved on the inner surface of the cover box 13. A spring 14 is provided between the movable rod 15 and the cover box 13. The two ends of the spring 14 are fixedly connected to the side of the cover box 13 and the surface of the end of the movable rod 15, respectively. The end of the movable rod 15 is sleeved on the inner wall of the side of the vertical frame 4 and the inner surface of the slot 16.

[0030] By setting a snap-fit ​​mechanism, when filling the inside of the filling cover 2 with graphite packing, the movable rod 15 can be moved outward first, so that its end moves out of the slot 16 to unlock the crossbar 5. Then, the crossbar 5 is moved laterally, so that the crossbar 5 moves laterally along the outer surface of the fixed block 12 until it reaches the slot 16 opened near the rotating wheel 6. Under the elastic reset action of the spring 14, the end of the movable rod 15 will be inserted into the inside of the slot 16 to lock the crossbar 5. This makes it easier to adjust the lateral position of the crossbar 5 and reduces the interference of the pressure plate 9 and other structures located above the filling cover 2 and in the middle of the crossbar 5 on the filling operation.

[0031] The upper surface of the middle part of the processing table 1 is fixedly installed with a housing 17, the top of the housing 17 is fixedly sleeved with a fixing plate 18, four sliders 20 are slidably installed on the inner surface of the fixing plate 18, the upper surface of each of the four sliders 20 is fixedly installed with a clamping piece 19, and the lower surface of each slider 20 is fixedly installed with a connecting rod 21.

[0032] An adjusting plate 22 is rotatably mounted on the inner surface of the bottom of the housing 17. The adjusting plate 22 has four guide grooves 26 inside. The inner surface of the guide grooves 26 is movably sleeved with the outer surface of the connecting rod 21. A toothed ring 23 is fixedly mounted on the side edge of the adjusting plate 22. A gear 24 meshes with the outer edge of the toothed ring 23. A motor 25 is provided on the top of the gear 24. The output end of the motor 25 is fixedly sleeved with the middle part of the gear 24, and its outer surface is fixedly mounted with the inner surface of the housing 17.

[0033] By setting the guide groove 26, during the rotation of the adjusting plate 22 against the inner wall of the housing 17, the guide groove 26 will push the connecting rod 21, which is traction sleeved inside the guide groove 26, to gradually approach the center of the adjusting plate 22, causing the slider 20 installed on the top of the connecting rod 21 to slide along the inner surface of the fixed plate 18, so that the clamping piece 19 moves, and completes the quick clamping or disassembly of the filling cover 2.

[0034] Among them, the four sliders 20, the four clamps 19, the four connecting rods 21, and the four guide grooves 26 are all arranged in a circle about the center of the connecting rod 21.

[0035] The working process of this utility model is as follows:

[0036] After fixing the filler cap 2 filled with graphite packing and the corresponding gland with bolts, the combined sealing mechanism can be installed at the connection between the fan main shaft and the housing for sealing treatment to reduce media leakage and other issues.

[0037] When fixing the filling cap 2 filled with graphite packing and the corresponding pressure cap, the filling cap 2 and the filling groove 3 can be combined and placed on the top of the fixing plate 18. Then, the control motor 25 drives the gear 24 to rotate, which drives the meshing gear ring 23 and the adjusting plate 22 fixed to the gear ring 23 to rotate along the inner wall of the bottom of the housing 17. The clamping plate 19 is moved by the connecting rod 21 and other structures, so that the clamping plate 19 limits the side edge of the filling cap 2 and the pressure cap. By controlling the rotation direction and angle of the motor 25, it is easy to quickly clamp and disassemble the filling cap 2 of different specifications.

[0038] After using the clamping plate 19 and other structures to limit the filling cap 2 and the corresponding pressure cap, the rotating wheel 6 can be rotated to drive the screw 7 fixedly connected at the bottom to rotate along the inner wall of the middle of the cross frame 5. The sleeve 8 threaded to the outer surface of the screw 7 will move downward along the outer surface of the screw 7, pushing the pressure pad 9 fixedly connected to the lower surface of the sleeve 8 and the connecting plate 10 fixedly installed at the bottom to gradually move downward, so that the limiting rod 11 connected to the upper surfaces of both ends of the connecting plate 10 moves downward along the inner surface of the cross frame 5 to limit it until the pressure pad 9 presses on the top of the filling cap 2 and the corresponding pressure cap, so that the two are in a suitable compressed state. After that, the filling cap 2 and the corresponding pressure cap can be connected with bolts, so that the pressure pad 9 and other structures can be used to assist in the pressing operation of the filling cap 2 and the corresponding pressure cap, freeing up labor and providing a more uniform and stable pressing effect.

[0039] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0040] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0041] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing mechanism between a fan impeller and an air inlet, characterized in that, include A processing table (1) is provided with a vertical frame (4) fixedly installed at the top of the processing table (1) along its length. A horizontal frame (5) is provided at the top of the vertical frame (4). A screw (7) is rotatably installed in the middle of the horizontal frame (5). A rotating wheel (6) is fixedly installed at the top of the screw (7). A sleeve (8) is threadedly connected to the outer surface of the bottom end of the screw (7). A pressure pad (9) is fixedly installed on the lower surface of the sleeve (8). A filling cover (2) is provided below the pressure plate (9). A filling groove (3) is provided in the middle of the filling cover (2). Graphite packing is filled inside the filling groove (3). A pressure cover for pressing and fixing is provided on the top of the filling cover (2). The filling cover (2) is installed with a pressure cover bolt.

2. The sealing mechanism between the fan impeller and the air inlet according to claim 1, characterized in that, A connecting plate (10) is fixedly installed on the outer surface of the bottom end of the sleeve (8). Limiting rods (11) are fixedly installed on the upper surfaces of both ends of the connecting plate (10). The outer surfaces of the two limiting rods (11) are slidably sleeved with the inner surface of the cross frame (5).

3. The sealing mechanism between the fan impeller and the air inlet according to claim 1, characterized in that, Fixing blocks (12) are fixedly installed on the opposite surfaces of the top of the vertical frame (4). The outer surface of the fixing block (12) is slidably installed on the inner surfaces of both sides of the horizontal frame (5). Slots (16) are provided at both ends of the side of the horizontal frame (5). A snap-fit ​​mechanism is provided on the side of the top of the vertical frame (4) away from the fixing block (12).

4. The sealing mechanism between the fan wheel and the air inlet according to claim 3, characterized in that, The snap-fit ​​mechanism includes a cover box (13), the outer surface of which is fixedly installed on the inner wall of the side of the vertical frame (4), and a movable rod (15) is slidably sleeved on the inner surface of the cover box (13). A spring (14) is provided between the movable rod (15) and the cover box (13). The two ends of the spring (14) are fixedly connected to the side of the cover box (13) and the surface of the end of the movable rod (15), respectively. The end of the movable rod (15) is sleeved on the inner wall of the side of the vertical frame (4) and the inner surface of the slot (16).

5. The sealing mechanism between the fan wheel and the air inlet of a fan according to claim 1, wherein, A housing (17) is fixedly installed on the upper surface of the middle part of the processing table (1). A fixing plate (18) is fixedly sleeved on the top of the housing (17). Four sliders (20) are slidably installed on the inner surface of the fixing plate (18). Clamping pieces (19) are fixedly installed on the upper surface of each of the four sliders (20), and connecting rods (21) are fixedly installed on the lower surface of each slider.

6. The sealing mechanism between the fan wheel and the air inlet of claim 5, wherein, An adjusting plate (22) is rotatably mounted on the inner surface of the bottom of the housing (17). The adjusting plate (22) has four guide grooves (26) inside. The inner surface of the guide grooves (26) is movably sleeved with the outer surface of the connecting rod (21). A toothed ring (23) is fixedly mounted on the side edge of the adjusting plate (22). A gear (24) meshes with the outer edge of the toothed ring (23). A motor (25) is provided on the top of the gear (24). The output end of the motor (25) is fixedly sleeved with the middle part of the gear (24), and its outer surface is fixedly mounted with the inner surface of the housing (17).

7. The sealing mechanism between the fan wheel and the air inlet of a fan according to claim 5, wherein, The four sliders (20), four clips (19), four connecting rods (21), and four guide grooves (26) are all arranged in a circle about the center of the connecting rod (21).

Images