CN116771695A

CN116771695A - Centrifugal fan

Info

Publication number: CN116771695A
Application number: CN202210593354.6A
Authority: CN
Inventors: 郭旭旭; 许聪
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2023-09-19

Abstract

The invention relates to the field of fans, in particular to a centrifugal fan. Including base, mount, a casing, have brush motor, a transmission shaft and an impeller, fixedly connected with mount on the base, fixedly connected with a casing on the mount, be equipped with air intake and air outlet on the casing, be equipped with the brush motor in the casing, there is the brush motor including uninstalling the piece, one side of uninstalling the piece is the opening, and rotates with a casing through the bearing and be connected, uninstallation piece internal surface fixedly connected with stator, uninstallation piece internal rotation is connected with the rotor, the one end fixedly connected with transmission shaft of rotor, the other end fixedly connected with impeller of a transmission shaft, and an impeller is located a casing. According to the invention, the outer shell of the brush motor is rotationally connected with the first shell through the bearing, so that the purpose of enabling the centrifugal fan to stop rapidly when the centrifugal fan needs to stop suddenly is achieved.

Description

Centrifugal fan

Technical Field

The invention relates to the field of fans, in particular to a centrifugal fan.

Background

The centrifugal fan is a driven fluid machine which utilizes an impeller rotating at high speed to accelerate gas according to the principle that kinetic energy is converted into potential energy, then decelerates and changes flow direction to convert kinetic energy into potential energy. In a single stage centrifugal fan, gas enters the impeller from an axial direction, changes to a radial direction as it flows through the impeller, and then enters the diffuser. In the diffuser, the gas changes flow direction and the increase in the cross-sectional area of the duct slows the gas flow, which slows down the kinetic energy into pressure energy. The pressure increase occurs mainly in the impeller and secondarily in the diffusion process. Centrifugal fans are widely used for ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

In the working process of the centrifugal fan, if the personal is threatened by casualties, the fan has abnormal noise, the bearing temperature rises sharply to exceed a specified value, or the fan has severe vibration and collision phenomena, the centrifugal fan needs to be subjected to emergency stop treatment, and in the prior art, the centrifugal fan often has the problem that the emergency stop effect is absent or the complete stop time is long when the emergency stop is carried out, so that personal injury and economic loss can be caused to a user.

In view of the above, the present invention provides a centrifugal fan to solve the above technical problems.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: in the working process of the centrifugal fan, if the personal is threatened by casualties, the fan has abnormal noise, the bearing temperature rises sharply to exceed a specified value, or the fan has severe vibration and collision phenomena, the centrifugal fan needs to be subjected to emergency stop treatment, and in the prior art, the centrifugal fan often has the problem that the emergency stop effect is absent or the complete stop time is long when the emergency stop is carried out, so that personal injury and economic loss can be caused to a user.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides a centrifugal fan which comprises a base, a fixing frame, a first shell, a brush motor, a first transmission shaft and a first impeller, wherein the fixing frame is fixedly connected to the upper surface of the base, the first shell is fixedly connected to the fixing frame, an air inlet and an air outlet are formed in the first shell, the brush motor is arranged in the first shell, the brush motor comprises an outer shell, one side of the outer shell is provided with an opening and is in rotary connection with the first shell through a bearing, a stator is fixedly connected to the inner surface of the outer shell, a rotor is in rotary connection with the inner surface of the outer shell, one end of the rotor is fixedly connected with the first transmission shaft, the other end of the first transmission shaft is fixedly connected with the first impeller, and the first impeller is positioned in the first shell.

Preferably, the spout has been seted up to the base upper surface, sliding connection has the slider in the spout, fixed surface is connected with No. two casings on the slider, be equipped with air intake and air outlet on No. two casings, no. two rotation is connected with No. two transmission shafts in the casing, no. two one end fixedly connected with No. two impellers of transmission shaft, no. two the other end and the rotor fixed connection of transmission shaft, no. two transmission shafts and a transmission shaft are the extending structure, no. two fixedly connected with and brush motor matched with brush on the casing is close to rotor one side surface.

Preferably, the screw rod is connected to the sliding block in a rotating way, the screw rod penetrates through the sliding block, one end of the screw rod is connected with the base in a rotating way and located on one side of the inner surface of the sliding groove, the other end of the screw rod is located outside the sliding groove and penetrates through the side wall of the base 1, and the other end of the screw rod is fixedly connected with the handle.

Preferably, the sleeve is fixedly connected to the outer surface of one side of the first shell, the other end of the sleeve is fixedly connected with the second shell, the electric brush is positioned in the sleeve, and the sleeve has certain elasticity.

Preferably, be equipped with electromagnetic braking ware in the casing, electromagnetic braking ware's one end and casing internal surface fixed connection, electromagnetic braking ware's the other end and shell body fixed connection, the spout has been seted up in the shell body, the spout is L shape, be equipped with slider and slide bar in the spout, fixedly connected with spring on the slider, the other end and the internal surface fixed connection of spout of spring, the one end of slide bar is located the spout, the other end fixedly connected with rubber pad of slide bar, the rubber pad is semi-circular, and the rubber pad cooperatees with the rotor, and the shell body is two halves concatenation formula, and through bolt fixed connection.

Preferably, the material of the sleeve is a heat conductive material.

The beneficial effects of the invention are as follows:

1. the invention connects the outer shell of the brush motor and the first shell through the bearing rotation and utilizes the opening and closing of the electromagnetic brake, when the motor needs to be scram, the motor outer shell and the motor rotor rotate together, and the inertia of the motor outer shell is utilized to accelerate the stopping of the motor stator, so that the scram time of the motor is shortened.

2. The invention uses the mutual coordination between the screw and the first transmission shaft and the second transmission shaft to adjust the relative position between the rotor and the stator so as to control the rotating speed of the brush motor, thereby achieving the effect of controlling the air quantity of the centrifugal fan.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of the position structure of the slide and the slide bar of the present invention;

fig. 4 is a cross-sectional view in the direction A-A of fig. 3 in accordance with the present invention.

In the figure: base 1, spout 11, slider 111, mount 2, no. 1 casing 3, sleeve 31, electromagnetic braking ware 32, brush motor 4, shell 41, spout 411, slider 412, slide bar 413, spring 414, rubber pad 415, stator 42, rotor 43, brush 44, no. 5 transmission shaft, no. 6 impeller, no. 7 casing, no. 8 transmission shaft, no. 9 impeller, screw 10, handle 101.

Detailed Description

The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.

The invention provides a centrifugal fan which comprises a base 1, a fixing frame 2, a first shell 3, a brush motor 4, a first transmission shaft 5 and a first impeller 6, wherein the fixing frame 2 is fixedly connected to the upper surface of the base 1, the first shell 3 is fixedly connected to the fixing frame 2, an air inlet and an air outlet are formed in the first shell 3, the brush motor 4 is arranged in the first shell 3, the brush motor 4 comprises an outer shell 41, one side of the outer shell 41 is provided with an opening and is in rotary connection with the first shell 3 through a bearing, a stator 42 is fixedly connected to the inner surface of the outer shell 41, a rotor 43 is connected in a rotary mode to the outer shell 41, one end of the rotor 43 is fixedly connected with the first transmission shaft 5, the other end of the first transmission shaft 5 is fixedly connected with the first impeller 6, and the first impeller 6 is positioned in the first shell 3.

In the working process of a centrifugal fan, if a person is threatened by casualties, the fan has abnormal noise, the bearing temperature rises sharply to exceed a specified value, or the fan has severe vibration, collision and the like, the centrifugal fan needs to be subjected to emergency stop treatment, in the prior art, the centrifugal fan always has the problem that the emergency stop effect is not achieved or the complete stop time is long in the emergency stop, therefore, the invention fixes the first shell 3 on the base 1 through the fixing frame 2, and the base 1 on the ground, thereby playing the role of fixing the whole centrifugal fan, the first shell 3 is rotatably connected with the brush motor 4 through the bearing, the rotor 43 with the brush motor 4 is fixedly connected with the first impeller 6, when the emergency situation needs to be met, the rotor 43 is fixedly connected with the first impeller 6 through the first transmission shaft 5, and the rotor 43 rotates with the load of the first impeller 6, and therefore, when the emergency stop is carried with the brush motor 4, the rotor 43 can completely stop in the emergency stop time due to the inertia of the first impeller 6, the invention can rotate together with the rotor 43 when the motor needs to be required, and the emergency stop of the motor 43 can rotate more rapidly, and the load can be increased.

As a specific implementation mode of the invention, a sliding groove 11 is formed in the upper surface of the base 1, a sliding block 111 is connected in the sliding groove 11 in a sliding way, a second shell 7 is fixedly connected to the upper surface of the sliding block 111, an air inlet and an air outlet are formed in the second shell 7, a second transmission shaft 8 is connected in a rotating way to the second shell 7, one end of the second transmission shaft 8 is fixedly connected with a second impeller 9, the other end of the second transmission shaft 8 is fixedly connected with a rotor 43, the second transmission shaft 8 and the first transmission shaft 5 are of telescopic structures, and an electric brush 44 matched with the brush motor 4 is fixedly connected to the outer surface of one side of the second shell 7, which is close to the rotor 43.

When the centrifugal fan is used in an outdoor self-contained power supply, the outdoor self-contained power supply is often not provided with a variable frequency condition, the second casing 7 is arranged on the base 1, the second transmission shaft 8 is rotationally connected with the second transmission shaft 8, one end of the second transmission shaft 8 is connected with the rotor 43, the other end of the second transmission shaft 8 is fixedly connected with the second impeller 9, when the brush motor 4 is started, the rotor 43 can simultaneously drive the first impeller 6 and the second impeller 9 to simultaneously rotate, the effect of simultaneously using a plurality of devices is achieved, meanwhile, the sliding groove 11 is formed in the upper surface of the base 1, the sliding block 111 can move in the sliding groove 11, and as the sliding block 111 is fixedly connected with the second casing 7, the sliding block 111 is pushed to slide to drive the second casing 7 to move, and simultaneously the first transmission shaft 5 and the second transmission shaft 8 are matched to stretch back and forth, so that the relative position between the rotor 43 and the stator 42 is changed, the strength of a coil relative to the number of turns of a magnet is changed, and the rotating speed of the rotor 43 is high, so that the brush motor 4 is controlled to simultaneously rotate through changing the relative position between the rotor 43 and the stator 42, the rotating speed of the rotor 4 is controlled, the normal rotating speed of the second impeller is guaranteed, and the second rotation of the fan is guaranteed, and the normal rotating speed of the second casing 8 is achieved, and the rotating speed of the fan is guaranteed.

As a specific embodiment of the present invention, the sliding block 111 is rotatably connected with the screw 10, and the screw 10 penetrates through the sliding block 111, one end of the screw 10 is rotatably connected with the base 1 and is located at one side of the inner surface of the chute 11, the other end of the screw 10 is located outside the chute 11 and penetrates through the side wall of the base 1, and the other end of the screw 10 is fixedly connected with the handle 101.

The sliding block 111 is pushed by hand to move in the sliding groove 11 to drive the second machine shell 7 to move very inconveniently, so that the handle 101 is fixedly connected to one end of the screw rod 10 by driving the connecting screw rod 10 on the sliding block 111, and the sliding block 111 can move in the sliding groove 11 only by rotating the handle 101 by hand to drive the screw rod 10 to rotate, so that the sliding block 111 can be driven to move conveniently.

As a specific embodiment of the invention, the sleeve 31 is fixedly connected to the outer surface of one side of the first shell 3, the other end of the sleeve 31 is fixedly connected with the second shell 7, the electric brush 44 is positioned in the sleeve 31, and the sleeve 31 has certain elasticity.

In order to facilitate the connection between the rotor 43 and the second transmission shaft 8, one side of the outer casing 41 is of an opening structure, which results in that a large amount of impurity particles and the like enter the outer casing 41 during normal use of the centrifugal fan and damage the motor, so that the exposed motor is completely positioned in the sleeve 31 by installing the sleeve 31 between the first casing 3 and the second casing 7, thereby preventing a large amount of impurity particles and the like from entering the outer casing 41 and protecting the brush motor 4.

As a specific implementation mode of the invention, an electromagnetic brake 32 is arranged in a first shell 3, one end of the electromagnetic brake 32 is fixedly connected with the inner surface of the first shell 3, the other end of the electromagnetic brake 32 is fixedly connected with an outer shell 41, a sliding groove 411 is formed in the outer shell 41, the sliding groove 411 is L-shaped, a sliding block 412 and a sliding rod 413 are arranged in the sliding groove 411, a spring 414 is fixedly connected onto the sliding block 412, the other end of the spring 414 is fixedly connected with the inner surface of the sliding groove 411, one end of the sliding rod 413 is positioned in the sliding groove 411, a rubber pad 415 is fixedly connected with the other end of the sliding rod 413, the rubber pad 415 is semicircular, the rubber pad 415 is matched with the rotor 43, and the outer shell 41 is in two-half spliced connection and is fixedly connected through a bolt.

When the brush motor 4 needs to be suddenly stopped, a worker opens the electromagnetic brake 32 to release the outer shell 41, the outer shell 41 is rotationally connected with the first shell 3 through a bearing, a certain friction force exists at the joint of the rotor 43 and the outer shell 41, the rotor 43 is in a high-speed rotating state, when the outer shell 41 is released, the outer shell 41 is continuously influenced by the friction force to rotate, the rotor 43 always rotates to always drive the outer shell 41 to move until the opening of the sliding groove 411 is vertically downward when the outer shell 41 rotates ninety degrees, and the sliding rod 413 is in sliding connection with the side wall of the sliding groove 411, so that the sliding groove 413 slides out of the sliding groove 411 due to the influence of gravity, the sliding groove 411 is positioned at the position of the sliding groove 411 due to the influence of gravity, the sliding groove 411 is separated from the sliding groove 413, the sliding groove 412 is limited due to the sliding rod is lost, the elastic force of the spring 414 moves towards the direction of the sliding groove 413, and accordingly the sliding groove 413 cannot return to the sliding groove 411 again, and in order to smoothly slide the sliding groove 413, and the weight of a lead material is increased; the rubber pad 415 at the other end of the sliding rod 413 contacts with the rotor 43 to increase the friction force between the sliding rod 413 and the rotor 43, so that the load when the rotor 43 rotates is increased, the rotor 43 drives the outer casing 41 to rotate together to increase the load of the rotor 43, and the effect of shortening the emergency stop time of the brushed motor 4 is achieved, because the initial low rotation speed is changed to be the same as the rotation speed of the rotor 43 when the outer casing 41 is driven to rotate by the rotor 43, huge inertia needs to be overcome, so that the rotor 43 can be accelerated to stop, the load born by the rotor 43 is far greater than the force of the outer casing 41 driven by the rotor to rotate by the outer casing 41 when the rotor 43 is fixed, namely, the friction force between the rotor 43 and the outer casing 41 is overcome, the outer casing 41 can slide out only by ninety degrees, and the angle of relative rotation of the outer casing 41 needs to be small, so that when the outer casing 41 is released, the outer casing 41 can be driven to rotate at a small angle by the friction force, the electromagnetic brake 32 can not be opened to release the outer casing 41 when the brushed motor 4 works normally, the outer casing 41 cannot rotate, and the existing centrifugal fan 43 can be stopped only when the outer casing 4 needs to rotate, and the following fan 43 can rotate in the emergency conditions: 1. for production requirements, the brush motor 4 needs to be stopped, and then the contactor is disconnected after the sudden stop is pressed down, namely the brush motor 4 is directly powered off, and the brush motor 4 can be decelerated and stopped; 2. casualties or serious property loss caused by production accidents occur, and the brush motor 4 is required to be stopped by an auxiliary device in an accelerating way; the invention is to realize that when the serious property loss or the serious personal injury is about to happen, the effect of reducing the property loss or the serious personal injury to the staff is achieved, so the invention is used as an auxiliary device to accelerate the brush motor 4 to stop so as to achieve the effect of emergency treatment; and the power cord is established at the afterbody of shell body 41, because the slight distortion that shell body 41 rotated and caused can not influence the use of power cord and after brush motor 4 scram, technicians can resume or change the new power cord with the power cord of distortion after having handled the accident, shell body 41 is two halves concatenation formula, and through bolt fixed connection, when auxiliary device starts, slide bar 413 is extruded the back promptly, only need unpack apart the shell body 41 of two halves concatenation, then can realize slide bar 413 and resume initial position this moment, can not waste the motor simultaneously, and shell body 41 is the L shape spout processing of its inside of two halves concatenation also convenience.

As a specific embodiment of the present invention, the material of the sleeve 31 is a thermally conductive material.

The centrifugal fan does not generate a large amount of heat during long-time operation, especially the heat generated by the motor is the most, and the operation of the centrifugal fan is influenced when the generated heat cannot be removed, so the invention has the effect of facilitating the heat dissipation of the brush motor 4 by selecting the material of the sleeve 31 as a heat-conductive material, such as heat-conductive silica gel.

Working principle: in the working process of a centrifugal fan, if a person is threatened by casualties, the fan has abnormal noise, the bearing temperature rises sharply to exceed a specified value, or the fan has severe vibration, collision and the like, the centrifugal fan needs to be subjected to emergency stop treatment, in the prior art, the centrifugal fan always has the problem that the emergency stop effect is not achieved or the complete stop time is long in the emergency stop, therefore, the invention fixes the first shell 3 on the base 1 through the fixing frame 2, and the base 1 on the ground, thereby playing the role of fixing the whole centrifugal fan, the first shell 3 is rotatably connected with the brush motor 4 through the bearing, the rotor 43 with the brush motor 4 is fixedly connected with the first impeller 6, when the emergency situation needs to be met, the rotor 43 is fixedly connected with the first impeller 6 through the first transmission shaft 5, and the rotor 43 rotates with the load of the first impeller 6, and therefore, when the emergency stop is carried with the brush motor 4, the rotor 43 can completely stop in the emergency stop time due to the inertia of the first impeller 6, the invention can rotate together with the rotor 43 when the motor needs to be required, and the emergency stop of the motor 43 can rotate more rapidly, and the load can be increased.

In order to facilitate the connection between the rotor 43 and the second transmission shaft 8, one side of the outer casing 41 is of an opening structure, which results in that a large amount of impurity particles and the like enter the outer casing 41 during normal use of the centrifugal fan and damage the motor, so that the exposed motor is completely positioned in the sleeve 31 by installing the sleeve 31 between the first casing 3 and the second casing 7, thereby preventing a large amount of impurity particles and the like from entering the outer casing 41 and protecting the motor.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a centrifugal fan, includes base (1), mount (2), a casing (3), has brush motor (4), a transmission shaft (5) and impeller (6), its characterized in that: the utility model discloses a motor with brush, including base (1), fixed surface is connected with mount (2) on base (1), fixedly connected with casing (3) on mount (2), be equipped with air intake and air outlet on casing (3), be equipped with brush motor (4) in casing (3), brush motor (4) are including shell body (41), one side of shell body (41) is the opening, and rotates through bearing and casing (3) and be connected, shell body (41) internal surface fixedly connected with stator (42), shell body (41) internal rotation is connected with rotor (43), the one end fixedly connected with transmission shaft (5) of rotor (43), the other end fixedly connected with impeller (6) of transmission shaft (5), and impeller (6) are located casing (3) one.

2. A centrifugal fan according to claim 1, wherein: the utility model discloses a motor brush, including base (1), base, rotor (8), rotor (43), rotor (8), sliding connection has spout (11) on the upper surface of base (1), sliding connection has slider (111) in spout (11), fixedly connected with No. two casings (7) on slider (111), be equipped with air intake and air outlet on No. two casings (7), no. two casing (7) internal rotation is connected with No. two transmission shafts (8), no. two impeller (9) of one end fixedly connected with of No. two transmission shafts (8), the other end and rotor (43) fixed connection of No. two transmission shafts (8), no. two transmission shafts (8) and No. one transmission shaft (5) are extending structure, fixedly connected with and brush motor (4) matched with brush (44) on No. two casing (7) are close to rotor (43) one side surface.

3. A centrifugal fan according to claim 2, wherein: the novel sliding block is characterized in that a screw (10) is rotationally connected to the sliding block (111), the screw (10) penetrates through the sliding block (111), one end of the screw (10) is rotationally connected with the base (1) and located on one side of the inner surface of the sliding groove (11), the other end of the screw (10) is located outside the sliding groove (11) and penetrates through the side wall of the base (1), and a handle (101) is fixedly connected to the other end of the screw (10).

4. A centrifugal fan according to claim 2, wherein: the electric brush is characterized in that a sleeve (31) is fixedly connected to the outer surface of one side of the first casing (3), the other end of the sleeve (31) is fixedly connected with the second casing (7), the electric brush (44) is located in the sleeve (31), and the sleeve (31) has certain elasticity.

5. A centrifugal fan according to claim 1, wherein: be equipped with electromagnetic braking ware (32) in casing (3), the one end and the casing (3) internal surface fixed connection of electromagnetic braking ware (32), the other end and the shell body (41) fixed connection of electromagnetic braking ware (32), spout (411) have been seted up in shell body (41), spout (411) are L shape, be equipped with slider (412) and slide bar (413) in spout (411), fixedly connected with spring (414) on slider (412), the other end and the internal surface fixed connection of spout (411) of spring (414), the one end of slide bar (413) is located spout (411), the other end fixedly connected with rubber pad (415) of slide bar (413), rubber pad (415) are semi-circular, and rubber pad (415) cooperatees with rotor (43).

6. A centrifugal fan according to claim 4, wherein: the material of the sleeve (31) is a heat-conductive material.