Elastic direct-connection high-temperature-resistant fan

Abstract

A flexible direct-drive high-temperature resistant fan includes a fan casing, impeller, motor, motor flange, fan casing base, motor bracket, and collector. Its key technical features are: the fan casing is mainly composed of a square panel, surrounding plates, reinforcing ribs, and a volute-shaped surrounding plate welded together; air inlet square plate assemblies and motor square plate assemblies are respectively installed on both sides of the fan casing and inserted into them; a motor flange heat insulation cover is installed on the motor flange; a shaft hole cover and a ventilation fan blade are installed on the impeller; a heat insulation material layer is installed inside the fan casing, air inlet square plate assembly, motor square plate assembly, motor flange heat insulation cover, and shaft hole cover; the fan casing, fan casing base, motor bracket, and motor are connected by an elastic connection with elastic shock-absorbing pads. This invention structurally solves the problems of overall fan insulation, motor heat dissipation, fan casing deformation, and energy loss. Simultaneously, the structure has no easily damaged parts, requires no maintenance, and meets the requirements for stable operation of the fan in high-temperature environments below 900℃.

Description

Technical Field

[0001] This invention belongs to the field of fans, specifically relating to a flexible direct-drive high-temperature resistant fan. Background Technology

[0002] High-temperature resistant fans are typically used for gas transmission in high-temperature environments. To prevent the motor from burning out under prolonged high temperatures, existing high-temperature direct-drive fans usually employ a water-cooled transmission mechanism between the fan casing and the motor. However, existing water-cooled high-temperature direct-drive fans have the following drawbacks: ① The water-cooled transmission mechanism is a wear-prone component, requiring extra space and incurring high maintenance costs; ② The fan casing structure cannot be insulated, leading to energy loss during high-temperature gas transmission; ③ When the internal gas temperature consistently exceeds 350°C, the fan casing deforms under prolonged high-temperature conditions, causing fan damage. Overcoming these shortcomings remains a challenge in the current technology. Summary of the Invention

[0003] To address the problems in existing technologies, this invention provides a flexible direct-drive high-temperature resistant fan that structurally solves the problems of motor heat dissipation, fan casing deformation, and energy loss. At the same time, the fan structure has no vulnerable parts, requires no maintenance, and meets the requirements for stable operation of the fan in high-temperature environments below 900℃.

[0004] This invention is achieved through the following technical solution: a flexible direct-drive high-temperature resistant fan, comprising a fan casing, an impeller, a motor with a motor flange, a fan casing base, a motor bracket, and a collector. The key technical points are: the fan casing is cuboid in shape, mainly composed of square panels on both sides and a surrounding plate arranged between the square panels; reinforcing ribs connected to the surrounding plate are respectively arranged near the inner side of the square panels; a volute surrounding plate connected to the reinforcing ribs is arranged between the reinforcing ribs; symmetrical square openings are provided on the square panels and the reinforcing ribs; an air inlet square plate assembly and a motor square plate assembly are respectively provided on the square panels on both sides, corresponding to and inserted into the square openings; the air inlet square plate assembly includes an air inlet fixing square plate with a collector in the middle, which is a cuboid structure corresponding to the square openings; an air inlet flange is provided on the outer side of the air inlet fixing square plate; the motor... The motor housing assembly includes a motor heat insulation housing, which is a cuboid structure that plugs into a square opening. A ventilation opening is located at the center of the motor heat insulation housing, and a connecting pad for connection to the motor flange is located on the outer side of the motor heat insulation housing. A motor flange heat insulation cover corresponding to the ventilation opening is also provided on the motor flange. A shaft hole cover for heat insulation is provided at the central shaft on the side of the impeller air inlet. Multiple ventilation fan blades that rotate coaxially with the impeller are provided on the side of the impeller near the motor. Heat insulation material layers are provided between the square panel and the reinforcing rib, on the outer side of the volute enclosure, inside the air inlet fixing housing, inside the motor heat insulation housing, inside the motor flange heat insulation cover, and between the shaft hole cover and the motor shaft. An air outlet corresponding to the outlet end of the volute enclosure is provided on the enclosure, and an air outlet flange is provided at the air outlet of the enclosure. The fan housing base is located at the bottom of the fan housing.

[0005] Furthermore, the reinforcing rib is mainly composed of a left reinforcing rib, a right reinforcing rib, an upper reinforcing rib, and a lower reinforcing rib welded together; L-shaped folds are provided at the square opening edge of the reinforcing rib and at the welding positions between the left, right, upper, and lower reinforcing ribs; and C-shaped folds are provided at the four edges of the reinforcing rib.

[0006] Furthermore, the motor is connected to the fan housing base via a motor bracket; elastic shock-absorbing pads are provided between the motor flange and the connecting pad, between the motor bracket and the motor, between the fan housing and the fan housing base, and between the motor bracket and the fan housing base.

[0007] Furthermore, the inner surface of the fixed square plate is flush with its adjacent reinforcing rib.

[0008] Furthermore, the outer sides of the air inlet fixing plate and the motor heat insulation plate are provided with protruding edges; the air inlet fixing plate and the motor heat insulation plate are respectively connected and fixed to the square panels on both sides through the edges.

[0009] Furthermore, the motor flange heat insulation cover is a conical truncated body with a pipe for the motor shaft to pass through at its center and heat insulation cover connecting pieces for connecting to the motor flange at its edge.

[0010] Furthermore, a limit locking plate is provided on the outer side of the shaft hole cover; the limit locking plate is connected to the impeller by bolts or screws to the shaft hole cover; the limit locking plate is connected to the motor shaft by bolts to the shaft hole cover.

[0011] Furthermore, the rear disc of the impeller is an inwardly concave cone.

[0012] Furthermore, the heat insulation material layer is a ceramic fiber felt or a nano-scale microporous heat insulation material.

[0013] The beneficial effects and features of this invention are as follows:

[0014] This invention achieves overall heat insulation of the casing by adding a heat insulation material layer between the outer side of the volute enclosure, the inside of the air inlet fixing plate, and the inside of the motor heat insulation plate; achieves heat insulation of the motor end by using the heat insulation cover of the motor flange and the heat insulation material layer inside it; and achieves heat insulation of the motor shaft by adding a heat insulation material layer between the shaft hole cover and the motor shaft; thus, the invention achieves overall heat insulation of the fan in the direct drive mode.

[0015] The integrated reinforcing ribs and volute-shaped enclosure structure, welded together with the fan casing, increase the strength of the fan casing while reducing resonance during operation, effectively preventing casing deformation under high temperatures. The motor drives the fan blades, and the ventilation openings accelerate airflow around the motor shaft, solving the heat dissipation problem and preventing damage caused by lubricant dilution or leakage due to overheating. This protects the motor structure. A locking plate on the shaft hole cover prevents the connecting bolts or screws from axially locking or falling off due to temperature changes, thus protecting the connection between the motor shaft and the impeller bushing. The symmetrical square openings on the square panels on both sides of the fan casing allow for left / right cyclone switching by rotating the casing. This invention also features a small footprint and requires no maintenance. Attached Figure Description

[0016] Figure 1 This is a simplified cross-sectional view of the overall structure of the present invention from the side.

[0017] Figure 2 for Figure 1 A simplified enlarged diagram of part A in the middle;

[0018] Figure 3 for Figure 1 A simplified enlarged diagram of part B;

[0019] Figure 4 This is a simplified cross-sectional view of the overall structure of the present invention from the front.

[0020] Figure 5 for Figure 4 A simplified enlarged diagram of section C;

[0021] Figure 6 This is a simplified cross-sectional view of a portion of the structure on the back of the present invention;

[0022] Figure 7 This is a simplified front view of a portion of the structure of the present invention.

[0023] The main components in the diagram are numbered as follows: 1. Fan casing; 101. Square panel; 102. Enclosure; 103. Reinforcing rib; 104. Volute enclosure; 105. Exit flange; 2. Inlet square plate assembly; 201. Inlet fixed square plate; 202. Collector; 203. Inlet flange; 3. Motor square plate assembly; 301. Motor heat insulation square plate; 302. Ventilation round opening; 303. Connecting pad; 4. Motor; 401. Motor flange; 402. Motor flange heat insulation cover; 403. Heat insulation cover connecting piece; 404. Motor shaft; 5. Impeller; 501. Impeller bushing; 502. Shaft hole cover; 503. Limit locking piece; 504. Ventilation fan blade; 6. Fan casing base; 7. Motor bracket; 8. Elastic shock-absorbing pad; 9. Heat insulation material layer.

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Implementation

[0025] The following combination Figure 1-7 The present invention will be described in detail through specific embodiments. Example

[0026] This flexible direct-drive high-temperature resistant fan includes a fan housing 1, an impeller 5, a motor 4 with a motor flange 401, a fan housing base 6, a motor bracket 7, and a collector. The fan housing is cuboid in shape and includes square panels 101 and surrounding plates 102 disposed between the square panels. Reinforcing ribs 103 connected to the surrounding plates are respectively disposed near the inner side of the square panels. A spiral surrounding plate 104 connected to the reinforcing ribs is disposed between the reinforcing ribs. Symmetrical square openings are provided on the square panels and reinforcing ribs. To facilitate increasing airflow... While increasing the strength of the casing, it also reduces the resonance generated during fan operation, effectively reducing high-temperature deformation of the casing. The reinforcing ribs are mainly composed of left, right, upper, and lower reinforcing ribs welded together. L-shaped folds are provided at the edges of the square openings of the reinforcing ribs and at the welding points between the left, right, upper, and lower reinforcing ribs. C-shaped folds are provided around the perimeter of the reinforcing ribs. The reinforcing ribs are strengthened by the process of folding the edges before welding, and the overall strength of the fan casing is increased by welding them together with the square panels, surrounding panels, and volute surrounding panels. On the square panels on both sides, there are air inlet square plate assemblies 2 and motor square plate assemblies 3 that are inserted into the square openings respectively. The air inlet square plate assembly includes an air inlet fixing square plate 201 with a collector 202 in the middle. The air inlet fixing square plate is a cuboid structure that is inserted into the square openings. To prevent a notch from forming inside the fan housing after the air inlet fixing plate is connected, which could cause eddies inside the fan and reduce fan efficiency, the inner side of the fixing plate is flush with its adjacent reinforcing rib. An air inlet flange 203 is provided on the outer side of the air inlet fixing plate. The motor mounting assembly includes a motor heat insulation plate 301, which is a cuboid structure that plugs into the square opening. A ventilation opening 302 is provided in the center of the motor heat insulation plate, and a connecting gasket 303 is provided on the outer side of the motor heat insulation plate to connect with the motor flange. This connecting gasket is fixed to the motor flange with bolts. For ease of installation and subsequent maintenance, the outer sides of the air inlet fixing plate and the motor heat insulation plate have protruding edges; these edges are fixed to the square panels on both sides with self-tapping screws. A motor flange heat insulation cover 402 corresponding to the ventilation opening is also provided on the motor flange. To facilitate ventilation through the ventilation opening, the motor flange heat shield is a conical truncated pedestal with a pipe at its center for the motor shaft to pass through. The edge of the heat shield is fitted with a heat shield connecting piece 403 that connects to the motor flange. This heat shield connecting piece is fixed to the motor flange with bolts.A heat-insulating shaft hole cover 502 is provided at the central shaft on one side of the impeller air inlet. A limiting locking piece 503 is also provided on the outside of the shaft hole cover. The limiting locking piece and the shaft hole cover are connected to the impeller by bolts or screws. The limiting locking piece and the shaft hole cover are connected to the shaft center of the motor shaft end by bolts. After the limiting locking piece and the shaft hole cover are fixed to the impeller and the motor shaft by bolts, the edge of the limiting locking piece near the bolt is folded over the bolt head, so that the bolt head and the folded edge of the limiting locking piece fit tightly together, preventing the bolt from being axially limited or falling off due to temperature changes, which would damage the fan and protect the connection between the motor shaft and the impeller bushing. Multiple ventilation fan blades 504 are provided on the side of the impeller near the motor, which rotate coaxially with it. The motor drives the ventilation fan blades to rotate, which, together with the ventilation port, accelerates the airflow at the motor shaft position, solving the heat dissipation problem of the motor shaft. To increase the structural strength of the impeller, the rear plate of the impeller is an inwardly concave cone. To achieve overall heat insulation for the fan, a heat insulation material layer 9 is provided between the square panel and the reinforcing rib, on the outside of the volute enclosure, inside the air inlet fixing plate, inside the motor heat insulation plate, inside the motor flange heat insulation cover, and between the shaft hole cover and the motor shaft. This heat insulation material layer is ceramic fiber felt or nano-microporous heat insulation material; it meets the requirements for high-temperature fans operating at 200℃-900℃. Depending on the usage requirements, ceramic fiber felt is selected for temperatures below 350℃; for temperatures above 350℃, a combination of ceramic fiber felt and nano-microporous heat insulation material is used.

[0027] An air outlet corresponding to the outlet end of the volute-shaped enclosure is provided on the enclosure plate, and an air outlet flange 105 is provided at the air outlet of the enclosure plate; the fan housing base is located at the bottom of the fan housing. In order to achieve overall vibration reduction and stable operation of the fan, the motor is connected to the fan housing base through a motor bracket; elastic shock-absorbing pads 8 are provided between the motor flange and the connecting pad, between the motor bracket and the motor, between the fan housing and the fan housing base, and between the motor bracket and the fan housing base.

[0028] The air inlet plate assembly and the motor plate assembly are standard parts welded together as one piece, which can be produced in advance for inventory, thus improving production efficiency. During installation, the distance between the impeller front plate and the collector can be effectively adjusted by moving the air inlet plate assembly and the motor plate assembly, which facilitates installation and subsequent debugging.

[0029] Because the square openings on the square panels on both sides of the fan casing are symmetrical, the fan can switch between left and right swirling by turning the direction of the fan casing.

[0030] This invention addresses the issues of casing resonance, high-temperature deformation, casing insulation, and energy conservation by combining a rigid fan casing with elastic shock-absorbing pads and an integrated heat insulation material. Their combination ensures high-temperature resistance. The elastic connection structure between the connecting pads and the motor flange enables bidirectional positioning of the motor and fan casing. Ventilation fan blades and ventilation openings facilitate air cooling at the motor end. A shaft hole cover, a motor heat insulation plate, and a motor flange heat insulation cover provide three-way heat insulation for the motor, ensuring high-temperature operation.

Claims

1. A flexible direct-drive high-temperature resistant fan, comprising a fan casing, an impeller, a motor with a motor flange, a fan casing base, a motor bracket, and a collector, characterized in that: The fan casing is cuboid in shape, consisting of square panels on both sides and a surrounding plate between the square panels. Reinforcing ribs connected to the surrounding plates are located near the inner side of the square panels. A spiral-shaped surrounding plate connected to the reinforcing ribs is located between the reinforcing ribs. Symmetrical square openings are provided on the square panels and reinforcing ribs. An air inlet disc assembly and a motor disc assembly are respectively installed on the square panels on both sides, corresponding to the square openings. The air inlet disc assembly includes an air inlet fixing disc with a central collector, which is a cuboid structure that inserts into the square opening. An air inlet flange is provided on the outer side of the air inlet fixing disc. The motor disc assembly includes a motor heat insulation disc, which is a cuboid structure that inserts into the square opening. A ventilation opening is located at the center of the motor heat insulation disc, and a connecting gasket connected to the motor flange is located on the outer side of the motor heat insulation disc. A motor flange heat insulation cover corresponding to the ventilation opening is also provided on the motor flange. A central shaft is located on one side of the impeller air inlet. A shaft hole cover for heat insulation; multiple ventilation fan blades coaxially rotating with the impeller are arranged on the side of the impeller near the motor; a layer of heat insulation material is arranged between the square panel and the reinforcing rib, on the outside of the volute enclosure, inside the air inlet fixing plate, inside the motor heat insulation plate, inside the motor flange heat insulation cover, and between the shaft hole cover and the motor shaft; an air outlet corresponding to the outlet end of the volute enclosure is provided on the enclosure, and an air outlet flange is provided at the air outlet of the enclosure; the fan housing base is located at the bottom of the fan housing; the reinforcing rib... The stiffening plate is composed of a left stiffening plate, a right stiffening plate, an upper stiffening plate, and a lower stiffening plate welded together; L-shaped folds are provided at the square opening edge of the stiffening plate and at the welding positions between the left stiffening plate, the right stiffening plate, the upper stiffening plate, and the lower stiffening plate; C-shaped folds are provided at the four edges of the stiffening plate; the heat insulation material layer is ceramic fiber felt or nano-scale microporous heat insulation material, which meets the requirements of high temperature environment of 200℃-900℃, wherein ceramic fiber felt is selected for high temperature below 350℃, and a combination of ceramic fiber felt and nano-scale microporous heat insulation material is used for high temperature above 350℃.

2. The flexible direct-drive high-temperature resistant fan according to claim 1, characterized in that: The motor is connected to the fan housing base via a motor bracket; elastic shock-absorbing pads are provided between the motor flange and the connecting pad, between the motor bracket and the motor, between the fan housing and the fan housing base, and between the motor bracket and the fan housing base.

3. The flexible direct-drive high-temperature resistant fan according to claim 1, characterized in that: The inner side of the fixed square plate is flush with the adjacent reinforcing rib.

4. The flexible direct-drive high-temperature resistant fan according to claim 1, characterized in that: The outer sides of the air inlet fixing plate and the motor heat insulation plate are provided with protruding edges; the air inlet fixing plate and the motor heat insulation plate are respectively connected and fixed to the square panels on both sides through the edges.

5. The flexible direct-drive high-temperature resistant fan according to claim 1, characterized in that: The motor flange heat insulation cover is a conical truncated body with a pipe for the motor shaft to pass through at its center and heat insulation cover connecting pieces for connecting to the motor flange at its edge.

6. The flexible direct-drive high-temperature resistant fan according to claim 1, characterized in that: A limit locking plate is also provided on the outer side of the shaft hole cover; the limit locking plate and the shaft hole cover are connected to the impeller by bolts or screws; the limit locking plate and the shaft hole cover are connected to the motor shaft by bolts.

7. The flexible direct-drive high-temperature resistant fan according to claim 1, characterized in that: The rear disc of the impeller is an inwardly concave cone.

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