Thermal expansion guide structure of regeneration fan

Abstract

The utility model discloses a thermal expansion guide structure of a regeneration fan, and relates to the technical field of fan guide structures, the thermal expansion guide structure comprises a support with a supporting function, a front cover and a rear cover of the fan are arranged on the two sides of the support respectively, and the front cover and the rear cover are movably connected with the support through guide assemblies. Through cooperative arrangement of the connecting plates, the guide rods, springs, nuts and other structures, the side walls of the front cover and the rear cover are connected with the middle support through the connecting plates and the guide rods, under the limiting effect of the connecting plates and the guide rods, the front cover and the rear cover cannot expand in the axial direction of the fan when heated, the front cover and the rear cover are slidably connected to the guide rods, and the service life of the fan is prolonged. After the front cover and the rear cover are heated, the front cover and the rear cover can expand and slide in the length direction of the guide rod, radial guiding of the front cover and the rear cover is achieved, and the problems that the thermal expansion displacement direction of an existing fan shell cannot be controlled, an original assembly gap of a fan is prone to being damaged, and the fan efficiency is reduced and the fan is damaged are solved as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of fan guide structures, and in particular to a thermal expansion guide structure for a regenerative fan. Background Art

[0002] Industrial furnaces often use fans to transport high-temperature gases. The gas temperature usually exceeds 300 degrees Celsius, and sometimes even reaches 600 degrees Celsius. Fans are usually made of steel, and their installation and commissioning are all carried out at room temperature. In the process of the fan going from cold to hot, the high-temperature gas passes through the flow components of the high-temperature fan, which will inevitably cause the temperature of the flow components such as the high-temperature fan casing to rise sharply. In addition, the expansion coefficient of steel is relatively large, and the casing will produce a large thermal expansion displacement due to the temperature rise.

[0003] The utility model patent with announcement number CN203756581U proposes: a thermal expansion guide device for a high-temperature fan, two support legs A are provided on one side of the casing, two support legs B are provided on the other side, the main shaft assembly is fixed on the integral base, and an air inlet is provided on one side of the casing, which is characterized in that: the support legs A and B are movably connected to the integral base by bolts, the fork frame is fixed to the side of the casing close to the main shaft assembly, the support frame is fixed to the integral base by bolts, and two guide rails are provided on the integral base. The guide plate is provided at the center of the lower outside of the casing and is located between the two guide rails.

[0004] The above-mentioned device blocks the guide plate through the guide rail, so that the casing mainly produces thermal expansion displacement along the axial direction toward the side of the air inlet, and the thermal expansion displacement of the casing in the height direction is not restricted. The expansion joint outside the air inlet is used to absorb the expansion displacement and partial deformation to solve the problem that the direction of the thermal expansion displacement of the casing cannot be controlled, which easily leads to the destruction of the original assembly gap of the fan, causing the fan efficiency to decrease, the fan to be damaged and other adverse consequences. The present application adopts another technical solution to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of the utility model is to solve or at least alleviate the problem that the direction of thermal expansion displacement of the existing fan casing cannot be controlled, which easily leads to the destruction of the original assembly gap of the fan, causing adverse consequences such as reduced fan efficiency and fan damage.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The thermal expansion guide structure of the regenerative fan includes a bracket with a supporting function. The front cover and the rear cover of the fan are respectively arranged on both sides of the bracket. The front cover and the rear cover are movably connected to the bracket through a guide assembly. The guide assembly includes two connecting plates fixedly connected on both sides of the bracket. The middle sections of the two connecting plates are penetrated by guide rods. The section of the guide rod located above the connecting plate is sleeved with a spring. The top ends of the two guide rods pass through the front cover and the rear cover respectively. The ends of the two guide rods located in the inner cavity of the front cover and the rear cover are screwed with nuts.

[0008] By adopting the above technical solution, when in use, the user first installs the front cover and the rear cover in the guide grooves on both sides of the bracket, then passes the top end of the guide rod through the through hole through the connecting plate, inserts it into the front cover and the rear cover, and fixes it with nuts. At this time, the front cover and the rear cover are limited by the connecting plate and the guide rod, and cannot expand along the axial direction of the fan when heated, thereby achieving control of the axial expansion of the fan. A spring is sleeved on the guide rod between the outer wall of the front cover and the rear cover and the connecting plate. When the front cover and the rear cover are heated, they can expand and slide along the length direction of the guide rod. At this time, the inner wall of the front cover and the rear cover is squeezed and fixed by the nut. During the expansion process, it moves outward along the guide rod and squeezes the spring to contract, so that the front cover and the rear cover expand in the radial direction of the regeneration fan. When the regeneration fan cools down, the spring pushes the front cover and the rear cover to return to their original position under the action of its own restoring force, thereby avoiding the problem that the direction of the thermal expansion displacement of the existing fan casing cannot be controlled, which easily leads to the destruction of the original assembly gap of the fan, resulting in reduced fan efficiency, fan damage and other adverse consequences.

[0009] Optionally, a guide groove is provided on the peripheral side of the bracket, and the inner cavity width of the guide groove is greater than the thickness of the side walls of the front cover and the rear cover.

[0010] By adopting the above technical solution, guide grooves are opened on both sides of the bracket to guide the expansion path of the front cover and the rear cover. The inner cavity width of the guide groove is greater than the thickness of the side walls of the front cover and the rear cover, which facilitates radial expansion of the front cover and the rear cover after heating.

[0011] Optionally, the connecting plate is in a rectangular plate-like structure, and a through hole for the guide rod to pass through is provided in the middle section of the connecting plate, and the inner diameter of the through hole is larger than the diameter of the guide rod.

[0012] By adopting the above technical solution, a through hole is opened in the middle section of the connecting plate, so that the guide rod can pass through the connecting plate through the through hole and then be installed on the front cover and the rear cover, guiding and limiting the front cover and the rear cover, and trying to avoid the front cover and the rear cover from expanding along the axial direction of the regeneration fan after preheating.

[0013] Optionally, a handle is fixedly connected to one end of the guide rod below the connecting plate, and an anti-skid groove with an anti-skid function is provided around the handle.

[0014] By adopting the above technical solution, a screw handle is provided, and an anti-slip groove is opened on the outer surface of the screw handle, so that the user can rotate the guide rod by the screw handle, thereby making it convenient for the user to screw the nut onto the guide rod.

[0015] Optionally, sliding sleeves are embedded in the connections between the front cover, the rear cover and the guide rod, and the outer walls of the two sliding sleeves are fixedly connected to the front cover and the rear cover respectively.

[0016] By adopting the above technical solution, a sliding sleeve is set to reinforce the connection between the front cover, the rear cover and the guide rod, so as to avoid the connection between the front cover, the rear cover and the guide rod from rubbing against the guide rod for a long time, which may easily cause wear.

[0017] Optionally, right-angle blocks are provided on both sides of the connecting end of the connecting plate and the bracket, one right-angle side of the right-angle block is welded to the connecting plate, and the other right-angle side of the right-angle block is welded to the bracket.

[0018] By adopting the above technical solution, a right-angle block is provided to increase the contact surface between the end of the connecting plate and the bracket, thereby greatly improving the installation stability of the connecting plate and the bracket.

[0019] Optionally, gaskets are sleeved on the guide rods above the two springs, and the sides of the two gaskets away from the springs are respectively in contact with the outer walls of the front cover and the rear cover.

[0020] By adopting the above technical solution, a gasket is set on the guide rod above the spring to protect the front cover and the rear cover, which avoids the spring directly abutting against the outer walls of the front cover and the rear cover when compressed, which may easily cause the front cover and the rear cover to deform due to extrusion.

[0021] In summary, the beneficial effects of this application are as follows:

[0022] The present application cooperates with the structures such as connecting plates, guide rods, springs and nuts, and the side walls of the front cover and the rear cover are connected to the middle bracket through connecting plates and guide rods. Due to the limiting effect of the connecting plates and guide rods, they cannot expand along the axial direction of the fan when heated. The front cover and the rear cover are both slidably connected to the guide rods, so that after the front cover and the rear cover are heated, they can expand and slide along the length direction of the guide rods to achieve radial guidance of the front cover and the rear cover, and try to avoid the problem that the direction of thermal expansion displacement of the existing fan casing cannot be controlled, which easily leads to the destruction of the original assembly gap of the fan, causing adverse consequences such as reduced fan efficiency and fan damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the present utility model;

[0024] Figure 2 This is a schematic diagram of the connection structure of the guide rod, spring, washer and nut of the utility model;

[0025] Figure 3 This is a schematic diagram of the installation structure of the connecting plate of the utility model.

[0026] Explanation of the accompanying symbols: 1. bracket; 2. guide groove; 3. front cover; 4. rear cover; 5. connecting plate; 6. right-angle block; 7. through hole; 8. guide rod; 9. screw handle; 10. spring; 11. gasket; 12. sliding sleeve; 13. nut; 14. anti-slip groove. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-3 This application is described in further detail.

[0028] See also Figure 1-3 The regenerative fan thermal expansion guide structure includes a support bracket 1, with a front cover 3 and a rear cover 4 of the fan disposed on either side of the bracket 1. Both the front cover 3 and the rear cover 4 are movably connected to the bracket 1 via a guide assembly. This allows the regenerative fan to expand along the guide assembly's guide direction when heated, thereby preventing uncontrolled thermal expansion displacement of the casing, which could easily lead to damage to the fan's original assembly clearance, resulting in reduced fan efficiency and damage.

[0029] The guide assembly includes two connecting plates 5 fixedly connected on both sides of the bracket 1. A guide rod 8 is passed through the middle section of the two connecting plates 5. The top ends of the two guide rods 8 pass through the front cover 3 and the rear cover 4 respectively, so that the front cover 3 and the rear cover 4 are connected to the bracket 1 through the guide rods 8 and the connecting plates 5. At this time, the front cover 3 and the rear cover 4 are limited by the connecting plates 5 and the guide rods 8, and cannot expand along the axial direction of the fan when heated, thereby achieving control of the axial expansion of the fan.

[0030] A section of the guide rod 8 located above the connecting plate 5 is sleeved with a spring 10, and one end of the two guide rods 8 located in the inner cavity of the front cover 3 and the rear cover 4 is screwed with a nut 13. When the front cover 3 and the rear cover 4 are heated, they can expand and slide along the length direction of the guide rod 8. At this time, the inner walls of the front cover 3 and the rear cover 4 are squeezed and fixed by the nut 13. During the expansion process, they move outward along the guide rod 8 and squeeze the spring 10 to contract, causing the front cover 3 and the rear cover 4 to expand in the radial direction of the regeneration fan. When the regeneration fan cools down, the spring 10 pushes the front cover 3 and the rear cover 4 to return to their original position under the action of its own restoring force.

[0031] Reference Figure 1 Guide grooves 2 are provided on the periphery of the bracket 1. The inner width of the guide grooves 2 is greater than the thickness of the sidewalls of the front cover 3 and the rear cover 4. The guide grooves 2 are provided on both sides of the bracket 1 to guide the expansion path of the front cover 3 and the rear cover 4. The inner width of the guide grooves 2 is greater than the thickness of the sidewalls of the front cover 3 and the rear cover 4, facilitating radial expansion of the front cover 3 and the rear cover 4 after heating.

[0032] Reference Figure 1The connecting plate 5 is a rectangular plate-shaped structure. A through hole 7 is provided in the middle section of the connecting plate 5 for the guide rod 8 to pass through. The inner diameter of the through hole 7 is larger than the diameter of the guide rod 8. The through hole 7 in the middle section of the connecting plate 5 allows the guide rod 8 to pass through the connecting plate 5 and then be installed on the front cover 3 and the rear cover 4. The through hole 7 guides and limits the front cover 3 and the rear cover 4, and minimizes the front cover 3 and the rear cover 4 from expanding along the axial direction of the regeneration fan after preheating.

[0033] Reference Figure 2 The guide rod 8 is fixedly connected to a knob 9 at one end below the connecting plate 5. The knob 9 is provided with an anti-skid groove 14 on its outer surface to prevent slipping. The knob 9 is provided with an anti-skid groove 14 on its outer surface to facilitate the user to rotate the guide rod 8 through the knob 9, thereby facilitating the user to screw the nut 13 onto the guide rod 8.

[0034] Reference Figure 3 The connection between the front cover 3, the rear cover 4 and the guide rod 8 is embedded with a sliding sleeve 12, and the outer walls of the two sliding sleeves 12 are fixedly connected to the front cover 3 and the rear cover 4 respectively. The sliding sleeves 12 are provided to reinforce the connection between the front cover 3, the rear cover 4 and the guide rod 8, and to minimize the problem of wear and tear caused by prolonged friction between the front cover 3 and the rear cover 4 and the guide rod 8.

[0035] Reference Figure 3 , right-angle blocks 6 are provided on both sides of the connection end between the connecting plate 5 and the bracket 1. One right-angle side of the right-angle block 6 is welded to the connecting plate 5, and the other right-angle side of the right-angle block 6 is welded to the bracket 1. The right-angle block 6 is provided to increase the contact surface between the end of the connecting plate 5 and the bracket 1, thereby greatly improving the stability of the installation of the connecting plate 5 and the bracket 1.

[0036] Reference Figure 3 The guide rods 8 above the two springs 10 are each sleeved with a gasket 11. The sides of the two gaskets 11 away from the springs 10 abut against the outer walls of the front cover 3 and the rear cover 4, respectively. The gaskets 11 are sleeved on the guide rods 8 above the springs 10 to protect the front cover 3 and the rear cover 4, and to minimize the direct abutment of the springs 10 against the outer walls of the front cover 3 and the rear cover 4 when compressed, which could easily cause the front cover 3 and the rear cover 4 to deform due to compression.

[0037] The implementation principle of this application is as follows: when in use, the user first installs the front cover 3 and the rear cover 4 in the guide grooves 2 on both sides of the bracket 1, and then inserts the top end of the guide rod 8 through the through hole 7 through the connecting plate 5, and then fixes it with the nut 13. At this time, the front cover 3 and the rear cover 4 are limited by the connecting plate 5 and the guide rod 8, and cannot expand along the axial direction of the fan when heated, thereby achieving control of the axial expansion of the fan. A spring 10 is sleeved on the guide rod 8 between the outer wall of the front cover 3 and the rear cover 4 and the connecting plate 5. When the front cover 3 and the rear cover 4 are heated Afterwards, it can expand and slide along the length direction of the guide rod 8. At this time, the inner walls of the front cover 3 and the rear cover 4 are squeezed and fixed by the nut 13. During the expansion process, they move outward along the guide rod 8 and squeeze the spring 10 to contract, so that the front cover 3 and the rear cover 4 expand in the radial direction of the regeneration fan. When the regeneration fan cools down, the spring 10 pushes the front cover 3 and the rear cover 4 to return to their original position under the action of its own restoring force, thereby avoiding the problem that the direction of the thermal expansion displacement of the existing fan casing cannot be controlled, which easily leads to the destruction of the original assembly gap of the fan, resulting in reduced fan efficiency, fan damage and other adverse consequences.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A regenerative fan thermal expansion guide structure, comprising a support bracket (1), a front cover (3) and a rear cover (4) of the fan are respectively provided on both sides of the bracket (1), and the front cover (3) and the rear cover (4) are both movably connected to the bracket (1) through a guide assembly, characterized in that: The guide assembly comprises two connecting plates (5) fixedly connected to both sides of the bracket (1), the middle sections of the two connecting plates (5) are each provided with a guide rod (8), a section of the guide rod (8) located above the connecting plates (5) is sleeved with a spring (10), the top ends of the two guide rods (8) respectively pass through the front cover (3) and the rear cover (4), and one end of the two guide rods (8) located in the inner cavity of the front cover (3) and the rear cover (4) is screwed with a nut (13).

2. The regenerative fan thermal expansion guide structure according to claim 1, characterized in that: A guide groove (2) is provided on the circumference of the bracket (1), and the inner cavity width of the guide groove (2) is greater than the thickness of the side walls of the front cover (3) and the rear cover (4).

3. The regenerative fan thermal expansion guide structure according to claim 1, characterized in that: The connecting plate (5) is a rectangular plate-shaped structure, and a through hole (7) for the guide rod (8) to pass through is provided in the middle section of the connecting plate (5), and the inner diameter of the through hole (7) is larger than the diameter of the guide rod (8).

4. The regenerative fan thermal expansion guide structure according to claim 1, characterized in that: A handle (9) is fixedly connected to one end of the guide rod (8) located below the connecting plate (5), and an anti-skid groove (14) with an anti-skid function is provided on the circumference of the handle (9).

5. The regenerative fan thermal expansion guide structure according to claim 1, characterized in that: Sliding sleeves (12) are embedded in the connection points between the front cover (3), the rear cover (4) and the guide rod (8), and the outer walls of the two sliding sleeves (12) are fixedly connected to the front cover (3) and the rear cover (4) respectively.

6. The regenerative fan thermal expansion guide structure according to claim 2, characterized in that: Right-angle blocks (6) are provided on both sides of the connection ends of the connecting plate (5) and the bracket (1); one right-angle side of the right-angle block (6) is welded to the connecting plate (5), and the other right-angle side of the right-angle block (6) is welded to the bracket (1).

7. The regenerative fan thermal expansion guide structure according to claim 1, characterized in that: Gaskets (11) are sleeved on the guide rods (8) above the two springs (10), and the sides of the two gaskets (11) away from the springs (10) are respectively in contact with the outer walls of the front cover (3) and the rear cover (4).

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