Overhung multi-stage centrifugal fan

Abstract

The utility model relates to fan technical field, propose a kind of cantilever type multistage centrifugal fan, including fan body, including motor, motor is installed at the top of mounting plate, the top of mounting plate is equipped with two sliding grooves of cooperation, the inside of two sliding grooves is slidably connected with sliding member, the top of two sliding members is equipped with the connecting block of penetration sliding groove, the top of two connecting blocks is connected with moving plate, the top of moving plate is rotatably connected with rotating rod, rotating rod is connected with protective cover, the bottom of protective cover is connected with two locating blocks, locating block is equipped with clamping block, clamping block is equipped with locating slot, the top of mounting plate is equipped with two short sliding grooves of cooperation with locating block, short sliding groove is equipped with the clamping groove of cooperation with clamping block on inner side wall, the inner upper side wall of clamping groove is equipped with locating hole, locating hole is slidably connected with locating bolt inside, to reduce the probability that motor is damaged by knock, reach the purpose of improving equipment stability.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to a cantilevered multi-stage centrifugal fan. Background Technology

[0002] Centrifugal fans are important mechanical devices that use gas as a medium to transfer mechanical energy to the gas to increase its pressure, and to pump or extract the gas to provide power for industrial production. Centrifugal fans include single-stage centrifugal fans and multi-stage centrifugal fans. According to the outlet pressure from low to high, they can be classified into ventilators, blowers, and compressors. According to the support structure, they can be classified into cantilever fans and double-bearing fans. According to the working principle, they can be classified into blade type and positive displacement type. Among them, blade type fans are the most widely used. Blade type fans are further divided into centrifugal fans, axial flow fans, and mixed flow fans.

[0003] A search revealed a patent publication number CN211901004U published on November 10, 2020, for a cantilevered multi-stage centrifugal fan. The fan is described as comprising a motor, a fan outlet, a fan inlet, an anemometer, a press, a flow regulating device, and a multi-stage centrifugal fan. The multi-stage centrifugal fan has a motor and a fan outlet at the top, a fan inlet on one side, an anemometer and a press above the fan inlet, and a flow regulating device on one side. The multi-stage centrifugal fan has a volute casing on the outside, an inlet pipe on one side, an outlet pipe at the top, and a main shaft inside, with three sets of impeller return devices connected to the main shaft.

[0004] Although the above-mentioned existing technical solutions increase the effective flow area and improve the processing efficiency of the device, the motor of the device is directly exposed to the outside world and is easily damaged by bumps, resulting in low equipment stability. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a cantilevered multi-stage centrifugal fan to solve the problem mentioned in the background technology that the motor is directly exposed to the outside world, making it susceptible to damage from impacts and resulting in low equipment stability.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a cantilevered multi-stage centrifugal fan, comprising a fan body and a motor. The fan body is provided with an air inlet and an air outlet. A rotating shaft is rotatably connected inside the fan body. One end of the rotating shaft passes through the fan body and is connected to a first transmission wheel. A mounting plate is fixedly connected to the top of the fan body. The motor is mounted on the top of the mounting plate. The output end of the motor is connected to a second transmission wheel that cooperates with the first transmission wheel. A transmission belt drives between the second transmission wheel and the first transmission wheel. Two cooperating sliding grooves are formed at the top of the mounting plate. Both sliding grooves have sliding components slidably connected inside. The top of each sliding component has a connecting block that penetrates the sliding groove. The top of each connecting block is fixedly connected to a movable plate. The top of the movable plate is rotatably connected to a rotating rod. A protective cover is fixedly connected to the rotating rod. The bottom of the protective cover is fixedly connected to two positioning blocks. Each positioning block has a locking block and a positioning groove. The top of the mounting plate has two short sliding grooves that mate with the positioning blocks. The inner sidewall of each short sliding groove has a locking groove that mates with the locking block. The upper inner sidewall of the locking groove has a positioning hole. The positioning hole is slidably connected to a positioning bolt that mates with the positioning groove.

[0009] By adopting the above technical solution, rotating the protective cover moves the positioning block and the locking block, causing them to insert into the short slide groove. Pushing the protective cover further moves the positioning block and the locking block, causing the locking block to insert into the slot. Then, pushing the positioning bolt into the positioning slot positions the locking block and the protective cover. The motor is located inside the protective cover, thus protecting it. When maintenance or repair is needed, pulling the positioning bolt disengages the locking bolt from the positioning slot. This allows the protective cover to move the locking block out of the slot, and rotating the protective cover moves the positioning block out of the short slide groove. This, in turn, moves the protective cover and the sliding component along the slide groove, moving the protective cover away from the motor. This facilitates motor maintenance, reduces the probability of motor damage from impacts, and improves equipment stability.

[0010] Optionally, an auxiliary plate is fixedly connected to the outer wall of the fan body, and the output end and the rotating shaft of the fan body are rotatably connected to the auxiliary plate. A protective shell is bolted to the auxiliary plate, and the first transmission wheel, the second transmission wheel and the transmission belt are all located inside the protective shell.

[0011] By adopting the above technical solution, the auxiliary plate works in conjunction with the protective shell to protect the first drive wheel, the second drive wheel, and the drive belt, reducing the probability of the equipment being damaged by external impacts.

[0012] Optionally, the protective cover has multiple evenly distributed heat dissipation slots.

[0013] By adopting the above technical solution, the heat dissipation slots are used to facilitate heat dissipation of the motor when the protective cover protects the motor, thereby reducing the probability of the motor overheating.

[0014] Optionally, the air inlet end of the fan body is provided with a protective mesh plate.

[0015] By adopting the above technical solution, the protective mesh is used to prevent personnel limbs or other large debris from entering the wind turbine body, thereby reducing the probability of equipment failure and personnel injury.

[0016] Optionally, the air outlet end of the fan body is bolted with a beveled protective component.

[0017] By adopting the above technical solution, the oblique opening protective component is used to prevent rainwater or other high-altitude debris from entering the fan body from the air outlet, thereby improving the stability of the equipment.

[0018] (III) Beneficial Effects

[0019] In summary, this utility model has at least one of the following beneficial technical effects:

[0020] This cantilevered multi-stage centrifugal fan operates by rotating the protective cover, which moves the positioning block and locking block, causing them to insert into a short sliding groove. Pushing the protective cover further moves the positioning block and locking block, causing the locking block to insert into a slot. This pushes the positioning bolt into the positioning groove, thus positioning the locking block and the protective cover. The motor is located inside the protective cover, providing protection. When motor maintenance or repair is needed, pulling the positioning bolt disengages the bolt from the positioning groove. This allows the protective cover to move the locking block out of the slot, and rotating the protective cover moves the positioning block out of the short sliding groove. This, in turn, moves the protective cover and its sliding components along the sliding groove, moving the protective cover away from the motor. This facilitates motor maintenance, reduces the probability of motor damage from impacts, and improves equipment stability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first side view of the present invention;

[0022] Figure 2 This is a schematic diagram of the second side view of the present invention;

[0023] Figure 3 This is a first cross-sectional view of the present invention.

[0024] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0025] In the diagram: 1. Fan body; 2. Motor; 3. First transmission wheel; 4. Mounting plate; 5. Second transmission wheel; 6. Transmission belt; 7. Sliding groove; 8. Sliding component; 9. Connecting block; 10. Moving plate; 11. Protective cover; 12. Positioning block; 13. Locking block; 14. Positioning bolt; 15. Auxiliary plate; 16. Protective shell; 17. Heat dissipation slot; 18. Protective mesh plate; 19. Angled protective component. Detailed Implementation

[0026] 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.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1-4A cantilevered multi-stage centrifugal fan includes a fan body 1 and a motor 2. The fan body 1 has an air inlet and an air outlet. A rotating shaft is rotatably connected inside the fan body 1. One end of the rotating shaft passes through the fan body 1 and is connected to a first transmission wheel 3. A mounting plate 4 is fixedly connected to the top of the fan body 1. The motor 2 is mounted on the top of the mounting plate 4. The output end of the motor 2 is connected to a second transmission wheel 5 that cooperates with the first transmission wheel 3. A transmission belt 6 drives the second transmission wheel 5 and the first transmission wheel 3. Two cooperating sliding joints are provided at the top of the mounting plate 4. The groove 7 has two sliding grooves 7, each with a sliding member 8 slidably connected inside. The top of each sliding member 8 has a connecting block 9 that penetrates the sliding groove 7. A movable plate 10 is fixedly connected to the top of each connecting block 9. A rotating rod is rotatably connected to the top of the movable plate 10. A protective cover 11 is fixedly connected to the rotating rod. Two positioning blocks 12 are fixedly connected to the bottom of the protective cover 11. Each positioning block 12 has a locking block 13 with a positioning groove. The top of the mounting plate 4 has two short sliding grooves that mate with the positioning blocks 12. The inner wall of each short sliding groove has a locking block. The 13 slots are designed to mate with each other. A positioning hole is provided on the upper inner side wall of the slot. A positioning bolt 14, which slidably connects to the positioning slot, is slidably connected inside the positioning hole. Rotating the protective cover 11 moves the positioning block 12 and the locking block 13, causing them to insert into the short sliding groove. Pushing the protective cover 11 further moves the positioning block 12 and the locking block 13, causing the locking block 13 to insert into the slot. At this point, the positioning bolt 14 is pushed into the positioning groove, thus positioning the locking block 13 and the protective cover 11. The motor 2 is located inside the protective cover 11, which protects the motor 2. When maintenance or repair of the motor 2 is required, the positioning bolt 14 is pulled out of the positioning groove. At this time, the protective cover 11 can be pushed to move the locking block 13 out of the locking groove. Then, the protective cover 11 can be rotated to move the positioning block 12 out of the short slide groove. Subsequently, the protective cover 11 is pushed to move the sliding member 8 along the sliding groove 7, so that the protective cover 11 is away from the motor 2. This facilitates the maintenance of the motor 2, reduces the probability of the motor 2 being damaged by impact, and improves the stability of the equipment.

[0029] Reference Figure 1 An auxiliary plate 15 is fixedly connected to the outer wall of the fan body 1. The output end and the rotating shaft of the fan body 1 are rotatably connected to the auxiliary plate 15. A protective shell 16 is bolted to the auxiliary plate 15. The first transmission wheel 3, the second transmission wheel 5 and the transmission belt 6 are all located inside the protective shell 16. The auxiliary plate 15 cooperates with the protective shell 16 to protect the first transmission wheel 3, the second transmission wheel 5 and the transmission belt 6, reducing the probability of the equipment being damaged by external impacts.

[0030] Reference Figure 1The protective cover 11 has a plurality of evenly distributed heat dissipation slots 17. The heat dissipation slots 17 are used to facilitate heat dissipation of the motor 2 when the protective cover 11 protects the motor 2, thereby reducing the probability of the motor 2 overheating.

[0031] Reference Figure 2 The air inlet end of the fan body 1 is equipped with a protective mesh plate 18. The protective mesh plate 18 is used to prevent personnel limbs or other large debris from entering the fan body 1, thereby reducing the probability of equipment failure and personnel injury.

[0032] Reference Figure 2 The air outlet end of the fan body 1 is bolted with a beveled protective piece 19. The beveled protective piece 19 is used to prevent rainwater or other high-altitude debris from entering the fan body 1 from the air outlet end, thereby improving the stability of the equipment.

[0033] In summary, the working principle and process of this cantilevered multi-stage centrifugal fan are as follows: First, rotate the protective cover 11. The protective cover 11 moves the positioning block 12 and the locking block 13, causing them to insert into the short slide groove. Then, push the protective cover 11 to move it, causing the positioning block 12 and the locking block 13 to move, allowing the locking block 13 to insert into the slot. Then, push the positioning bolt 14 into the positioning groove to position the locking block 13, thus positioning the protective cover 11. At this time, the motor 2 is located inside the protective cover 11, thus protecting the motor 2. When maintenance or repair of the motor 2 is required, pull the positioning bolt 14 out of the positioning groove. This allows the protective cover 11 to move the locking block 13 out of the slot, and then rotate the protective cover 11 to move the positioning block 12 out of the short slide groove. The protective cover 11 is pushed to move the sliding member 8 along the sliding groove 7, so that the protective cover 11 is away from the motor 2, thereby facilitating the maintenance of the motor 2 and reducing the probability of the motor 2 being damaged by impact, thus improving the stability of the equipment. The auxiliary plate 15 cooperates with the protective shell 16 to protect the first transmission wheel 3, the second transmission wheel 5 and the transmission belt 6, reducing the probability of the equipment being damaged by external impact. The heat dissipation slot 17 is used to facilitate the heat dissipation of the motor 2 when the protective cover 11 is protecting the motor 2, thereby reducing the probability of the motor 2 overheating. The protective mesh plate 18 is used to prevent personnel limbs or other large debris from entering the fan body 1, thereby reducing the probability of equipment failure and personnel injury. The slanted protective member 19 is used to prevent rainwater or other high-altitude debris from entering the fan body 1 from the air outlet, thereby improving the stability of the equipment.

[0034] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A cantilevered multi-stage centrifugal fan, comprising a fan body (1), characterized in that: Includes a motor (2), the fan body (1) is provided with an air inlet and an air outlet, the fan body (1) is rotatably connected to a rotating shaft, one end of the rotating shaft passes through the fan body (1) and is connected to a first transmission wheel (3), the top of the fan body (1) is fixedly connected to a mounting plate (4), the motor (2) is mounted on the top of the mounting plate (4), the output end of the motor (2) is connected to a second transmission wheel (5) that cooperates with the first transmission wheel (3), the second transmission wheel (5) and the first transmission wheel (3) are connected by a transmission belt (6), the top of the mounting plate (4) is provided with two cooperating sliding grooves (7), the two sliding grooves (7) are slidably connected to sliding parts (8), the two sliding parts (8) are slidably connected to each other. The top of each component (8) is provided with a connecting block (9) that passes through the sliding groove (7). The top of the two connecting blocks (9) is fixedly connected to a moving plate (10). The top of the moving plate (10) is rotatably connected to a rotating rod. A protective cover (11) is fixedly connected to the rotating rod. The bottom of the protective cover (11) is fixedly connected to two positioning blocks (12). The positioning block (12) is provided with a locking block (13). The locking block (13) is provided with a positioning groove. The top of the mounting plate (4) is provided with two short sliding grooves that cooperate with the positioning blocks (12). The inner side wall of the short sliding groove is provided with a locking groove that cooperates with the locking block (13). The upper inner side wall of the locking groove is provided with a positioning hole. The positioning hole is slidably connected with a positioning bolt (14) that cooperates with the positioning groove.

2. The cantilevered multi-stage centrifugal fan according to claim 1, characterized in that: An auxiliary plate (15) is fixedly connected to the outer wall of the fan body (1). The output end and the rotating shaft of the fan body (1) are rotatably connected to the auxiliary plate (15). A protective shell (16) is bolted to the auxiliary plate (15). The first transmission wheel (3), the second transmission wheel (5) and the transmission belt (6) are all located inside the protective shell (16).

3. A cantilevered multi-stage centrifugal fan according to claim 1, characterized in that: The protective cover (11) has a plurality of evenly distributed heat dissipation slots (17).

4. A cantilevered multi-stage centrifugal fan according to claim 1, characterized in that: The air inlet end of the fan body (1) is provided with a protective mesh plate (18).

5. A cantilevered multi-stage centrifugal fan according to claim 1, characterized in that: The air outlet end of the fan body (1) is bolted to a beveled protective piece (19).

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