Direct connection type high-temperature axial-flow ventilator

Abstract

The utility model discloses a direct connection type high-temperature axial flow fan, and particularly relates to the technical field of axial flow fans, the direct connection type high-temperature axial flow fan comprises a fan support, a heat preservation and insulation layer, limiting clamping blocks and an aluminum alloy heat dissipation wheel, the heat preservation and insulation layer is arranged in an inner cavity of the fan support, and the limiting clamping blocks are respectively arranged on the right side of an installation rib plate and the right side of a motor base. An aluminum alloy heat dissipation wheel is mounted at one end, close to the motor, of the lengthened spindle; heat generated by the motor can be quickly dissipated through the aluminum heat dissipation wind wheel, high-temperature invasion can be effectively resisted in cooperation with the C-level insulation motor, a heat insulation barrier is formed through the heat preservation and insulation layer with the sufficient thickness, heat of high-temperature medium gas transmitted to motor equipment is effectively reduced, the temperature of the outer surface of the ventilator is reduced, and the service life of the ventilator is prolonged. It is guaranteed that the motor stably operates under the working condition of conveying 550 DEG C medium gas for a long time, modular connection is formed between the motor base and the support through cooperation of the detachable fixing plate and the limiting clamping block, and damaged parts can be conveniently and independently replaced.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan technology, and more specifically, to a direct-drive high-temperature axial flow fan. Background Technology

[0002] Axial flow fans are a common type of fan, characterized by airflow in the same direction as the drive shaft of the fan blades. A search revealed that patent publication number CN218817089 discloses an automatic axial flow fan. This patent primarily addresses the problem of vibration during operation when a dust filter cleaning rod is added. The proposed technical solution includes an axial flow fan body and a dust filter. The dust filter is clipped to the front end of the axial flow fan body. A servo motor and fan blades are installed inside the axial flow fan body. A servo controller is mounted on the servo motor. The fan blades are fixedly connected to the output end of the servo motor. A cleaning mechanism is installed between the output end of the servo motor and the dust filter. Utilizing the drive gear and transmission gear of the cleaning mechanism, the inner liner can rotate slowly while the fan blades rotate at high speed, thereby cleaning the dust accumulated on the dust filter, preventing clogging, and ensuring stable operation of the entire axial flow fan. During the development of this utility model, the inventors discovered the following problems with the existing technology:

[0003] Existing axial flow fans, when used in the chemical industry, involve multiple high-temperature processes such as cracking, polymerization, and distillation. When exposed to these continuously high-temperature media, the motor is prone to heat buildup, which can lead to a decline in the performance of internal insulation materials, a shortened motor life, or even failure. The motor insulation layer will age rapidly, causing short circuits in the windings and making it impossible to ensure the normal operation of the equipment. Once the ventilation equipment fails, it can lead to pressure imbalance in the reactor, accumulation of harmful gases, and serious safety accidents such as explosions and poisoning. Furthermore, when a component such as the motor or impeller is damaged due to high-temperature aging, the entire equipment must be disassembled and reinstalled and debugged, which not only affects the maintenance efficiency of the staff but also increases the risk of burns to the operators during maintenance.

[0004] Therefore, a direct-drive high-temperature axial flow fan is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a direct-drive high-temperature axial flow fan to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a direct-drive high-temperature axial flow fan, comprising a fan bracket, a thermal insulation layer, limiting blocks, and aluminum alloy heat dissipation wheels. The thermal insulation layer is disposed within the inner cavity of the fan bracket. A motor base is mounted on the left side of the fan bracket, and mounting ribs are welded to both ends of the right side of the motor base. The limiting blocks are respectively disposed on the right side of the mounting ribs and the motor base, and six sets of limiting blocks are provided.

[0007] Both sets of mounting ribs are welded with detachable fixing plates at their front and rear ends. The left side surface of the fan bracket is provided with a slot, and there are six sets of slots. A motor is installed on the upper end of the motor base. An extended spindle is installed on the output end of the motor. An aluminum alloy heat sink is installed on the end of the extended spindle near the motor, and an impeller is installed on the end of the extended spindle away from the motor.

[0008] Preferably, the inner cavity of the fan bracket has a cavity for the thermal insulation layer to be filled, and the end of the extended main shaft away from the motor passes through the inner cavity of the fan bracket and the thermal insulation layer in sequence and is connected to the impeller.

[0009] Preferably, the six sets of limiting blocks correspond to the positions of the six sets of slots, and the detachable fixing plates are fixed to the surface of the fan bracket by bolts. The opposite surfaces at the lower ends of the two sets of detachable fixing plates are welded to both sides of the motor base.

[0010] Preferably, each set of mounting ribs is limited by two sets of limiting blocks being engaged into the inner cavities of the corresponding two sets of slots, and the two sets of mounting ribs are symmetrically arranged.

[0011] Preferably, the motor base is limited by two additional sets of limiting blocks embedded in the inner cavities of the corresponding two sets of slots, and the shape of the motor base is inverted U-shaped.

[0012] Preferably, a mounting frame is provided around the edge of the fan bracket, and the surface of the mounting frame has several holes for equipment installation.

[0013] Preferably, a connecting flange is provided on the right edge of the motor, and the inner cavity of the connecting flange has a cavity for the installation of the aluminum alloy heat sink wheel. The motor is connected to the fan bracket through the connecting flange.

[0014] Preferably, the impeller blades are airfoil-shaped, and the motor is used to drive the extended main shaft to rotate the impeller around its axis.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. Compared with existing technologies, this direct-drive high-temperature axial flow fan can quickly dissipate the heat generated by the motor through the aluminum heat dissipation impeller. Combined with the Class C insulated motor, it can effectively resist high temperature attacks. The sufficiently thick heat insulation layer forms a heat insulation barrier, which effectively reduces the heat transfer of high-temperature medium gas to the motor equipment, lowers the temperature of the external surface of the fan, and ensures stable operation of the motor under the condition of conveying medium gas at 550℃ for a long time.

[0017] 2. Compared with existing technologies, this direct-drive high-temperature axial flow fan uses a detachable fixing plate and a limiting block to form a modular connection between the motor base and the bracket. Simply align the limiting block with the slot, insert it for quick positioning, and tighten the bolts to complete the fixation. Disassembly is done in reverse, which simplifies the installation process, facilitates the replacement of damaged parts individually without disassembling the entire equipment, and shortens the on-site commissioning and maintenance time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0019] Figure 2 This is a side view of the overall structure of this utility model.

[0020] Figure 3 This is a side sectional view of the detachable fixing plate of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the limiting block and detachable fixing plate of this utility model.

[0022] Figure 5 This is a side view of the impeller structure of this utility model.

[0023] The attached diagram is labeled as follows: 1. Fan bracket; 2. Thermal insulation layer; 3. Mounting rib; 4. Motor base; 5. Removable fixing plate; 6. Limiting block; 7. Slot; 8. Mounting frame; 9. Motor; 10. Extended main shaft; 11. Aluminum alloy heat sink wheel; 12. Connecting flange; 13. Impeller. Detailed Implementation

[0024] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] As attached Figures 1 to 5The illustrated direct-drive high-temperature axial flow fan includes a fan bracket 1, a thermal insulation layer 2, a limiting block 6, and an aluminum alloy heat dissipation wheel 11. The thermal insulation layer 2 is disposed within the inner cavity of the fan bracket 1. The fan bracket 1 serves as the supporting frame for the entire unit, connecting the air duct and components. The thermal insulation layer 2 is made of high-temperature resistant rock wool material to block heat conduction from 550℃ to the motor base 4 and the motor 9, preventing the motor 9 from failing due to overheating. The motor base 4 is installed on the left side of the fan bracket 1, providing a mounting base for the motor 9 and ensuring its connection with the motor. The impeller 13 is coaxial. Both ends of the right side of the motor base 4 are welded with mounting ribs 3. The mounting ribs 3 increase the support points of the motor base 4. They are rigidly connected to the motor base 4 and the detachable fixing plate 5 by welding. They form an installation structure with the detachable fixing plate 5 and the limiting block 6. They are then locked to the fan bracket 1 by bolts to achieve modular installation. They can be separated from the fan bracket 1. The limiting block 6 is set on the right side of the mounting ribs 3 and the motor base 4. There are six sets of limiting blocks 6. After the limiting block 6 is inserted into the slot 7, it forms a rigid limit.

[0027] Both sets of mounting ribs 3 have detachable fixing plates 5 welded to their front and rear ends. The left side surface of the fan bracket 1 has six sets of slots 7 evenly distributed, allowing the load of the motor base 4 to be distributed to multiple support points of the fan bracket 1 via limiting blocks 6. A motor 9 is mounted on the upper end of the motor base 4. Class C insulation material allows the motor 9 to operate for extended periods in higher temperature environments. Combined with the thermal insulation layer 2, it can withstand the temperature rise near the motor base 4. An extended spindle 10 is mounted on the output end of the motor 9. An aluminum alloy heat sink 11 is installed at the end of the extended main shaft 10 near the motor 9. As the extended main shaft 10 rotates, it can quickly dissipate the heat of the area between the front cover of the motor 9 and the extended main shaft 10 through air convection. An impeller 13 is installed at the end of the extended main shaft 10 away from the motor 9. The motor 9 is directly connected to the impeller 13 through the extended main shaft 10. The extended and thickened design ensures that the shaft system is not prone to bending or breakage when driving the 316 stainless steel impeller 13, thus ensuring the reliability of high-speed rotation.

[0028] Example 2

[0029] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 5 As shown below, see details:

[0030] In a preferred embodiment, the inner cavity of the fan bracket 1 has a cavity for the insulation layer 2 to be filled. The insulation layer 2 fills the inner cavity of the fan bracket 1, which can significantly reduce the heat conduction of the medium gas at 550°C to the motor base 4 and the motor 9, avoid the insulation aging and bearing failure of the motor 9 due to the high temperature environment, and ensure the long-term stable operation of the motor 9. The end of the extended main shaft 10 away from the motor 9 passes through the inner cavity of the fan bracket 1 and the insulation layer 2 and is connected to the impeller 13. The extended main shaft 10 of the motor 9 drives the impeller 13 to rotate, thereby performing ventilation.

[0031] In a preferred embodiment, the six sets of limiting blocks 6 correspond to the positions of the six sets of slots 7, forming a multi-point limiting mechanism. The detachable fixing plate 5 is fixed to the surface of the fan bracket 1 by bolts. The opposite surfaces of the lower ends of the two sets of detachable fixing plates 5 are welded to both sides of the motor base 4. Each set of mounting ribs 3 is limited by two sets of limiting blocks 6 being inserted into the inner cavities of the corresponding two sets of slots 7. The two sets of mounting ribs 3 are symmetrically arranged. The motor base 4 and the mounting ribs 3 are further fixed by the detachable fixing plate 5 and the limiting blocks 6. The motor base 4 is limited by the other two sets of limiting blocks 6 being embedded into the inner cavities of the corresponding two sets of slots 7. The shape of the motor base 4 is an inverted U-shape. The two sides of the inverted U-shaped motor 9 are connected to the detachable fixing plate 5 by welding, so as to cooperate with each other for fixation and bear the load from various sources.

[0032] As a preferred embodiment, a mounting frame 8 is provided around the edge of the fan bracket 1. The surface of the mounting frame 8 has several holes for equipment installation. The multiple sets of holes in the mounting frame 8 distribute the stress points of the bolts, and evenly transfer the vibration load during equipment operation to the installation foundation. It supports multiple installation methods, meets the installation requirements of different positions in the air duct layout, and can be disassembled by removing the bolts.

[0033] In a preferred embodiment, a connecting flange 12 is provided on the right edge of the motor 9. The connecting flange 12 further fixes the motor 9 on the fan bracket 1. The inner cavity of the connecting flange 12 has a cavity for the installation of the aluminum alloy heat sink 11. The aluminum alloy heat sink 11 relies on the high thermal conductivity material and the turbulence effect of the rotating airflow to form an active heat dissipation mechanism, which significantly reduces the operating temperature of the motor 9 and key components. The motor 9 is connected to the fan bracket 1 through the connecting flange 12. The blades of the impeller 13 are wing-shaped. The motor 9 is used to drive the extended main shaft 10 to rotate the impeller 13 around its axis. The blades of the impeller 13 are wing-shaped, which will push the air to flow axially. The air is drawn in axially before entering the impeller 13, accelerated by the blades, and discharged axially to form a continuous airflow.

[0034] The working process of this utility model is as follows: First, the fan bracket 1 is installed through several holes in the mounting frame 8 and the mounting base structure such as the air duct is installed with bolts. When the Class C insulated motor 9 is powered on and started, it directly drives the impeller 13 to rotate at high speed through the extended main shaft 10. The extended design of the extended main shaft 10 keeps the impeller 13 away from the motor 9 area, avoiding direct impact of high temperature airflow on the motor 9. At the same time, the thickened shaft diameter improves the torsional strength, ensuring that the shaft system is stable and does not bend when driving the 316 stainless steel airfoil-shaped impeller 13. When the airfoil-shaped blades of the impeller 13 rotate with the extended main shaft 10, the aerodynamic pressure difference on the blade surface is used to draw air into the center of the impeller 13 axially. After being accelerated by the blades, the air is discharged axially, forming a continuous airflow and realizing the ventilation function.

[0035] Meanwhile, the aluminum alloy heat dissipation wheel 11 rotates with the main shaft, dissipating heat from the front cover and shaft end of the generator 9 through air convection. In conjunction with the high-temperature resistant rock wool insulation layer 2 inside the fan bracket 1, the heat conduction of the 550℃ high-temperature medium to the motor base 4 and the motor 9 is blocked. The six sets of limit blocks 6 correspond one-to-one with the six sets of slots 7 on the left side surface of the fan bracket 1. After the mounting rib 3 and the motor base 4 are mechanically limited by inserting the limit blocks 6 into the inner cavity of the slots 7, the detachable fixing plate 5 is locked to the fan bracket 1 by bolts, thereby realizing the modular installation and disassembly of the mounting rib 3 and the motor base 4. The above is the working principle of this direct-drive high-temperature axial flow fan.

Claims

1. A direct-drive high-temperature axial flow fan, comprising a fan bracket (1), a thermal insulation layer (2), a limiting block (6), and an aluminum alloy heat dissipation wheel (11), characterized in that: The thermal insulation layer (2) is disposed in the inner cavity of the fan bracket (1). A motor base (4) is installed on the left side of the fan bracket (1). Mounting ribs (3) are welded to both ends of the right side of the motor base (4). The limiting blocks (6) are respectively disposed on the right side of the mounting ribs (3) and the motor base (4). There are six sets of limiting blocks (6). The front and rear ends of the two sets of mounting ribs (3) are welded with detachable fixing plates (5). The left side surface of the fan bracket (1) is provided with a slot (7), and there are six sets of slots (7). The upper end of the motor base (4) is equipped with a motor (9). The output end of the motor (9) is equipped with an extended spindle (10). An aluminum alloy heat sink wheel (11) is installed at the end of the extended spindle (10) close to the motor (9), and an impeller (13) is installed at the end of the extended spindle (10) away from the motor (9).

2. The direct-drive high-temperature axial flow fan according to claim 1, characterized in that: The inner cavity of the fan bracket (1) has a cavity for the thermal insulation layer (2) to be filled. The end of the extended main shaft (10) away from the motor (9) passes through the inner cavity of the fan bracket (1) and the thermal insulation layer (2) and is connected to the impeller (13).

3. The direct-drive high-temperature axial flow fan according to claim 1, characterized in that: The six sets of limiting blocks (6) correspond to the positions of the six sets of slots (7). The detachable fixing plate (5) is fixed to the surface of the fan bracket (1) by bolt engagement. The opposite surfaces of the lower ends of the two sets of detachable fixing plates (5) are welded to both sides of the motor base (4).

4. A direct-drive high-temperature axial flow fan according to claim 1, characterized in that: Each set of mounting ribs (3) is limited by two sets of limiting blocks (6) being inserted into the inner cavity of the corresponding two sets of slots (7), and the two sets of mounting ribs (3) are symmetrically arranged.

5. A direct-drive high-temperature axial flow fan according to claim 1, characterized in that: The motor base (4) is limited by the other two sets of limiting blocks (6) being embedded in the inner cavity of the corresponding two sets of slots (7). The shape of the motor base (4) is inverted U-shaped.

6. A direct-drive high-temperature axial flow fan according to claim 1, characterized in that: The fan bracket (1) is surrounded by an installation frame (8), and the surface of the installation frame (8) has several holes for equipment installation.

7. A direct-drive high-temperature axial flow fan according to claim 1, characterized in that: A connecting flange (12) is provided on the right edge of the motor (9). The inner cavity of the connecting flange (12) has a cavity for the aluminum alloy heat sink wheel (11) to be installed. The motor (9) is connected to the fan bracket (1) through the connecting flange (12).

8. A direct-drive high-temperature axial flow fan according to claim 2, characterized in that: The blades of the impeller (13) are wing-shaped, and the motor (9) is used to drive the extended main shaft (10) to rotate the impeller (13) around its axis.

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