A centrifugal fan

Abstract

The present invention relates to the technical field of centrifugal fans, and discloses a centrifugal fan, including a base, a housing assembly fixedly mounted on the top of the base, a connecting pipe fixedly mounted on the outlet end of the housing assembly, a motor fixedly mounted on the outer wall of the housing assembly, a connecting wheel fixedly mounted on the outer edge of the power output shaft of the motor, and a centrifugal impeller fixedly mounted on the outer wall of the connecting wheel. The two ends of the centrifugal blade are respectively slidably connected with the wheel plate one and the wheel plate two through the slide groove one and the slide groove two, so that the centrifugal blade can be rotated around the center of the slide groove two. When the rotation direction of the motor is fixed, the centrifugal impeller can drive the centrifugal blade to rotate by changing the position of the centrifugal blade at the slide groove two, and the contact angle between the centrifugal blade and the air is changed, thereby changing the pressure applied to the air by the rotation of the centrifugal impeller, and realizing the change of different states of the centrifugal impeller.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal fans, in particular to a centrifugal fan. Background Art

[0002] Fan is the customary abbreviation for gas compression and gas delivery machinery. The fans commonly referred to include ventilators, blowers, and wind turbines. Fans rely on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machinery and is widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains, wind tunnel wind sources and inflation and propulsion of hovercraft, etc.

[0003] According to the blade angle of the impeller, centrifugal impellers can be divided into three types: forward-inclined impellers, radial impellers, and backward-inclined impellers.

[0004] Forward-inclined wind wheels, radial wind wheels, and backward-inclined wind wheels can be used in different environments respectively, while existing centrifugal fans can only be equipped with one type of wind wheel, so that a single centrifugal fan can only be used in a specific environment. Therefore, a centrifugal fan is proposed. Summary of the invention

[0005] The present invention provides a centrifugal fan, which solves the problems raised by the above background technology.

[0006] The present invention provides the following technical solution: a centrifugal fan comprises a base, a shell assembly is fixedly assembled on the top of the base, a connecting pipe is fixedly assembled on the outlet end of the shell assembly, a motor is fixedly assembled on the outer wall of the shell assembly, a connecting wheel is fixedly assembled on the outer edge of the power output shaft of the motor, and a centrifugal impeller is fixedly assembled on the outer wall of the connecting wheel.

[0007] As a preferred technical solution of the present invention: the base includes a bracket, the bottom of both sides of the bracket are fixedly equipped with buffer blocks, and the top of the buffer block is fixedly equipped with a support plate.

[0008] As a preferred technical solution of the present invention: the outer shell assembly includes a shell body, a shell one is fixedly assembled on the side of the shell body close to the motor, a shell two is fixedly assembled on the side of the shell body away from the motor, an inlet is fixedly assembled on the inner edge of the shell two, and a guide port is fixedly assembled on the outer edge of the inlet close to the motor.

[0009] As a preferred technical solution of the present invention: the centrifugal impeller includes a connecting rod, and wheel plate 1 and wheel plate 2 are fixedly mounted on both sides of the connecting rod, and a sliding groove 1 is provided on the outer wall of the wheel plate 1 close to the wheel plate 2;

[0010] A second slide groove is provided on the outer wall of the second wheel plate close to the first wheel plate, a connecting groove is provided on the outer wall at the center of the second wheel plate, and a driving assembly is fixedly mounted on the outer wall of the second wheel plate away from the first wheel plate;

[0011] A plurality of centrifugal blades are arranged between the wheel plate 1 and the wheel plate 2.

[0012] As a preferred technical solution of the present invention: the positions of the chute 1 and the chute 2 correspond to each other, and a plurality of chute 1 and chute 2 are annularly arranged on the outer walls of the wheel plate 1 and the wheel plate 2 respectively;

[0013] The two ends of the centrifugal blade are respectively slidably sleeved with the wheel plate 1 and the wheel plate 2 through the slide groove 1 and the slide groove 2;

[0014] The outer wall of the centrifugal blade away from the center of the wheel plate is provided with meshing teeth, and the meshing teeth are drivingly connected to the driving component.

[0015] As a preferred technical solution of the present invention: the driving assembly includes a mounting shell, the inner cavities at both ends of the mounting shell are rotatably connected with gears, the outer walls at both ends of the mounting shell are fixedly equipped with motors, and the motor and gear are drivingly connected.

[0016] As a preferred technical solution of the present invention: the gear and the meshing teeth are meshed with each other.

[0017] As a preferred technical solution of the present invention: the outer wall of the centrifugal blade located at the second slide groove is fixedly equipped with a sliding clamping plate, and the centrifugal blade is slidably sleeved with the inner wall of the second slide groove through the sliding clamping plate.

[0018] As a preferred technical solution of the present invention: the connecting rod is arranged on both sides of the centrifugal blade, the outer edge of the connecting rod is sleeved with a cleaning layer, and the cleaning layer is in contact with the outer walls of both sides of the centrifugal blade.

[0019] The present invention has the following beneficial effects:

[0020] 1. The centrifugal fan has two ends of a centrifugal blade that are slidably connected with a wheel plate one and a wheel plate two through a slide groove one and a slide groove two, respectively, so that the centrifugal blade can rotate around the center of the slide groove two. When the rotation direction of the motor is fixed, the position of the centrifugal blade at the slide groove two is changed, so that the centrifugal impeller drives the centrifugal blade to rotate, and the contact angle between the centrifugal blade and the air is changed, thereby changing the pressure applied to the air by the rotation of the centrifugal impeller, thereby realizing the change of different states of the centrifugal impeller.

[0021] 2. The centrifugal fan drives the centrifugal blades to move along the two directions of the slide groove through the meshing teeth of the driving assembly, thereby changing the distance between a plurality of centrifugal blades and the center of a circle of the wheel plate, so that the center of gravity of the periphery of the centrifugal impeller changes; thereby solving the problem that dust accumulates on the surface of any one or more groups of centrifugal blades, causing the center of gravity of the periphery of the centrifugal impeller to change, and causing vibration when the centrifugal impeller rotates.

[0022] 3. The centrifugal fan increases the stability of the connection between the centrifugal blade and the wheel plate 2 by sliding the centrifugal blade through the sliding card and the inner wall of the second slide groove. At the same time, the sliding card and the inner wall of the second slide groove are slidably connected, so that the separation block generated by the second slide groove in the wheel plate 2 through the annular opening can be fixed by the sliding card;

[0023] A cleaning layer is sleeved on the outer edge of the connecting rod, and the cleaning layer fits the outer walls of both sides of the centrifugal impeller. When the centrifugal impeller moves along the two directions of the slide groove, the centrifugal impeller is cleaned by the friction between the impeller and the cleaning layer, thereby solving the problem of dust accumulation on the surface of the centrifugal impeller due to long-term operation of the centrifugal impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention from another viewing angle;

[0026] Figure 3 It is a schematic diagram of the structure of the housing assembly of the present invention;

[0027] Figure 4 This is a schematic diagram of the connecting wheel structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the flow guide port structure of the present invention;

[0029] Figure 6 This is a structural schematic diagram of a wheel plate of the present invention;

[0030] Figure 7 This is a schematic diagram of the centrifugal blade structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the connection groove structure of the present invention;

[0032] Fig. 9 This is a schematic diagram of the connecting rod structure of the present invention;

[0033] Fig.10 This is a schematic diagram of the structure of the drive assembly of the present invention;

[0034] Fig.11 This is a schematic diagram of the structure of the wheel plate 2 of the present invention;

[0035] Fig.12 This is a schematic diagram of the moving state of the centrifugal blade of the present invention;

[0036] Fig.13 It is a schematic diagram of the sliding card structure of the present invention.

[0037] In the figure: 1. base; 2. housing assembly; 3. connecting pipe; 4. motor; 5. centrifugal impeller; 6. connecting wheel;

[0038] 101, bracket; 102, buffer block; 103, support plate;

[0039] 201, shell body; 202, shell one; 203, shell two; 204, inlet; 205, diversion port;

[0040] 501, connecting rod; 502, wheel plate 1; 503, wheel plate 2; 504, slide slot 1; 505, slide slot 2; 506, connecting slot; 507, driving assembly; 508, centrifugal blade; 509, meshing teeth;

[0041] 5071, mounting housing; 5072, motor; 5073, gear;

[0042] 5081, sliding pallet. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 1-Figure 13 A centrifugal fan comprises a base 1, a shell assembly 2 is fixedly mounted on the top of the base 1, a connecting pipe 3 is fixedly mounted on the outlet end of the shell assembly 2, a motor 4 is fixedly mounted on the outer wall of the shell assembly 2, a connecting wheel 6 is fixedly mounted on the outer edge of the power output shaft of the motor 4, and a centrifugal impeller 5 is fixedly mounted on the outer wall of the connecting wheel 6.

[0045] In a preferred embodiment, the base 1 includes a bracket 101 , and buffer blocks 102 are fixedly mounted on the bottoms of both sides of the bracket 101 , and a support plate 103 is fixedly mounted on the top of the buffer block 102 .

[0046] In the above structure, the device is supported by the base 1 .

[0047] In a preferred embodiment: the housing assembly 2 includes a shell body 201, a shell body 202 is fixedly assembled on the side of the shell body 201 close to the motor 4, a shell body 203 is fixedly assembled on the side of the shell body 201 away from the motor 4, an inlet 204 is fixedly assembled on the inner edge of the shell body 203, and a guide port 205 is fixedly assembled on the outer edge of the inlet 204 close to the motor 4.

[0048] In the above structure, the air is guided by the outer shell component 2, and when the motor 4 drives the centrifugal impeller 5 to rotate through the connecting wheel 6, the air driven by the centrifugal impeller 5 can be guided to the outlet through the outer shell component 2 and discharged through the connecting pipe 3. By setting the inlet 204 and the guide port 205, the air is guided to the inner cavity of the outer shell component 2 through the inlet 204, and is guided to the inner cavity of the centrifugal impeller 5 through the guide port 205, thereby increasing the air inflow efficiency.

[0049] In a preferred embodiment: the centrifugal impeller 5 includes a connecting rod 501, and a wheel plate 1 502 and a wheel plate 2 503 are fixedly mounted on both sides of the connecting rod 501, and a sliding groove 1 504 is provided on the outer wall of the wheel plate 1 502 near the wheel plate 2 503;

[0050] A second slide groove 505 is provided on the outer wall of the second wheel plate 503 close to the first wheel plate 502, a connecting groove 506 is provided on the outer wall at the center of the second wheel plate 503, and a driving assembly 507 is fixedly mounted on the outer wall of the second wheel plate 503 away from the first wheel plate 502;

[0051] A plurality of centrifugal blades 508 are arranged between the wheel plate 1 502 and the wheel plate 2 503 .

[0052] In the above structure, wheel plate 1 502 and wheel plate 2 503 are fixed by connecting rod 501, and through wheel plate 1 502, guide port 205 and wheel plate 1 502 are rotatably connected, thereby realizing the connection between centrifugal impeller 5 and housing assembly 2, so as to increase the smoothness of air flowing through guide port 205 into wheel plate 1 502 and wheel plate 2 503.

[0053] In a preferred embodiment: the positions of the first slide groove 504 and the second slide groove 505 correspond to each other, and a plurality of the first slide grooves 504 and the second slide grooves 505 are respectively arranged on the outer walls of the first wheel plate 502 and the second wheel plate 503 in an annular shape;

[0054] The two ends of the centrifugal blade 508 are respectively slidably connected with the wheel plate 1 502 and the wheel plate 2 503 through the slide groove 1 504 and the slide groove 2 505;

[0055] The outer wall of the centrifugal blade 508 away from the center of the wheel plate 502 is provided with meshing teeth 509, and the meshing teeth 509 are drivingly connected to the driving component 507.

[0056] In the above structure, the two ends of the centrifugal blade 508 are respectively slidably connected with the wheel plate 1 502 and the wheel plate 2 503 through the slide groove 1 504 and the slide groove 2 505, so that the centrifugal blade 508 can rotate around the center of the slide groove 2 505. When the rotation direction of the motor 4 is fixed, the position of the centrifugal blade 508 at the slide groove 2 505 is changed, so that the centrifugal impeller 5 can drive the centrifugal blade 508 to rotate, and the contact angle between the centrifugal blade 508 and the air is changed, thereby changing the pressure applied to the air by the rotation of the centrifugal impeller 5, and realizing the change of different states of the centrifugal impeller 5;

[0057] Specifically, when the arc of the centrifugal blade 508 is consistent with the involute direction of the housing assembly 2, a backward-inclined impeller is formed between the centrifugal blade 508 and the centrifugal impeller 5, that is, the impeller outlet angle is less than 90 degrees, which is also called a backward impeller. In layman's terms, from the radial cross-section of the wind wheel, the angle between the outer extension line of the blade and the opposite direction of the tangent line of the blade's rotation direction at that point is an acute angle, which is a backward-inclined wind wheel;

[0058] When the arc of the centrifugal blade 508 is opposite to the involute direction of the housing assembly 2, a forward-inclined impeller is formed between the centrifugal blade 508 and the centrifugal impeller 5, that is, the impeller outlet angle is greater than 90 degrees, which is a forward-inclined impeller or a forward impeller. In layman's terms, from the radial cross-section of the wind wheel, the angle between the outer extension line of the blade and the opposite direction of the tangent line of the rotation direction of the blade at that point is an obtuse angle, which is a forward-inclined wind wheel.

[0059] In a preferred embodiment: the driving assembly 507 includes a mounting shell 5071, the inner cavities at both ends of the mounting shell 5071 are rotatably connected to gears 5073, the outer walls at both ends of the mounting shell 5071 are fixedly equipped with motors 5072, and the motor 5072 and the gear 5073 are drivingly connected.

[0060] In the above structure, the motor 5072 and the gear 5073 are driven and connected, so that the motor 5072 drives the gear 5073 to rotate, and then the driving assembly 507 is meshed with the meshing teeth 509, so that the centrifugal blade 508 is driven by the meshing teeth 509 to move along the direction of the second slide groove 505;

[0061] Specifically, the driving assembly 507 drives the centrifugal blades 508 to move along the direction of the slide groove 2 505 through the meshing teeth 509, thereby changing the distance between the centrifugal blades 508 and the center of the wheel plate 1 502, so that the center of gravity of the periphery of the centrifugal impeller 5 changes; thereby solving the problem that dust accumulates on the surface of any one or more groups of centrifugal blades 508, causing the center of gravity of the periphery of the centrifugal impeller 5 to change, causing vibration when the centrifugal impeller 5 rotates.

[0062] In a preferred embodiment, the gear 5073 and the meshing teeth 509 are meshed with each other.

[0063] In a preferred embodiment: the outer wall of the centrifugal blade 508 located at the second slide groove 505 is fixedly equipped with a sliding clamp 5081 , and the centrifugal blade 508 is slidably connected with the inner wall of the second slide groove 505 through the sliding clamp 5081 .

[0064] In the above structure, the centrifugal blade 508 is slidably connected with the inner wall of the sliding groove 505 through the sliding clamp 5081, so that the stability of the connection between the centrifugal blade 508 and the wheel plate 503 is increased. At the same time, the sliding clamp 5081 is slidably connected with the inner wall of the sliding groove 505, so that the separation block produced by the annular sliding groove 505 in the wheel plate 503 can be fixed by the sliding clamp 5081.

[0065] In a preferred embodiment, the connecting rod 501 is disposed on both sides of the centrifugal blade 508 , and a cleaning layer is sleeved on the outer edge of the connecting rod 501 , and the cleaning layer is in contact with the outer walls of both sides of the centrifugal blade 508 .

[0066] In the above structure, a cleaning layer is sleeved on the outer edge of the connecting rod 501, and the cleaning layer and the outer walls of the two sides of the centrifugal blade 508 are in contact with each other, so that when the centrifugal blade 508 moves along the direction of the second slide groove 505, the centrifugal blade 508 is cleaned by the friction between the centrifugal blade 508 and the cleaning layer, thereby solving the problem of dust accumulation on the surface of the centrifugal blade 508 due to long-term operation of the centrifugal blade 508.

[0067] Working principle: the air is guided by the housing component 2, and when the motor 4 drives the centrifugal impeller 5 to rotate through the connecting wheel 6, the air driven by the centrifugal impeller 5 can be guided to the outlet through the housing component 2 and discharged through the connecting pipe 3. By setting the inlet 204 and the guide port 205, the air is guided to the inner cavity of the housing component 2 through the inlet 204, and guided to the inner cavity of the centrifugal impeller 5 through the guide port 205, thereby increasing the air inflow efficiency;

[0068] The two ends of the centrifugal blade 508 are respectively slidably connected with the wheel plate 1 502 and the wheel plate 2 503 through the slide groove 1 504 and the slide groove 2 505, so that the centrifugal blade 508 can rotate around the center of the slide groove 2 505. When the rotation direction of the motor 4 is fixed, the centrifugal blade 508 is changed at the position of the slide groove 2 505, so that the centrifugal impeller 5 drives the centrifugal blade 508 to rotate, and the contact angle between the centrifugal blade 508 and the air is changed, thereby changing the pressure applied to the air by the rotation of the centrifugal impeller 5, and realizing the change of different states of the centrifugal impeller 5;

[0069] The motor 5072 and the gear 5073 are connected to each other, so that the motor 5072 drives the gear 5073 to rotate, and then the driving assembly 507 is meshed with the meshing teeth 509, so that the centrifugal blade 508 is driven by the meshing teeth 509 to move along the direction of the second slide groove 505;

[0070] Specifically, the driving assembly 507 drives the centrifugal blades 508 to move along the direction of the second slide groove 505 through the meshing teeth 509, thereby changing the distance between the centrifugal blades 508 and the center of the wheel plate 1 502, so that the center of gravity of the periphery of the centrifugal impeller 5 changes; thereby solving the problem that dust accumulates on the surface of any one or more groups of centrifugal blades 508, causing the center of gravity of the periphery of the centrifugal impeller 5 to change, causing the centrifugal impeller 5 to vibrate when rotating;

[0071] The centrifugal blade 508 is slidably sleeved with the inner wall of the second slide groove 505 through the sliding clamp 5081, so that the stability of the connection between the centrifugal blade 508 and the second wheel plate 503 is increased. At the same time, the sliding clamp 5081 is slidably sleeved with the inner wall of the second slide groove 505, so that the separation block generated by the second slide groove 505 in the second wheel plate 503 through the annular opening can be sleeved and fixed through the sliding clamp 5081;

[0072] A cleaning layer is sleeved on the outer edge of the connecting rod 501, and the cleaning layer fits the outer walls of the centrifugal blade 508 on both sides. When the centrifugal blade 508 moves along the direction of the second slide groove 505, the centrifugal blade 508 is cleaned by the friction between the centrifugal blade 508 and the cleaning layer, thereby solving the problem of dust accumulation on the surface of the centrifugal blade 508 due to long-term operation of the centrifugal blade 508.

[0073] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal fan, comprising a base (1), characterized in that: A housing component (2) is fixedly mounted on the top of the base (1), a connecting pipe (3) is fixedly mounted on the outlet end of the housing component (2), a motor (4) is fixedly mounted on the outer wall of the housing component (2), a connecting wheel (6) is fixedly mounted on the outer edge of the power output shaft of the motor (4), and a centrifugal impeller (5) is fixedly mounted on the outer wall of the connecting wheel (6); The centrifugal impeller (5) comprises a connecting rod (501), and wheel plate 1 (502) and wheel plate 2 (503) are respectively fixedly mounted on both sides of the connecting rod (501), and a sliding groove 1 (504) is provided on an outer wall of a side of the wheel plate 1 (502) close to the wheel plate 2 (503); A second slide groove (505) is provided on the outer wall of the second wheel plate (503) close to the first wheel plate (502), a connecting groove (506) is provided on the outer wall at the center of the second wheel plate (503), and a driving assembly (507) is fixedly mounted on the outer wall of the second wheel plate (503) away from the first wheel plate (502); A plurality of centrifugal blades (508) are arranged between the wheel plate 1 (502) and the wheel plate 2 (503); The positions of the slide groove 1 (504) and the slide groove 2 (505) correspond to each other, and a plurality of slide grooves 1 (504) and slide grooves 2 (505) are arranged in a ring shape on the outer walls of the wheel plate 1 (502) and the wheel plate 2 (503) respectively; The two ends of the centrifugal blade (508) are respectively slidably connected to the wheel plate 1 (502) and the wheel plate 2 (503) through the slide groove 1 (504) and the slide groove 2 (505); The outer wall of the centrifugal blade (508) away from the center of the wheel plate (502) is provided with meshing teeth (509), and the meshing teeth (509) are drivingly connected to the driving assembly (507); The driving assembly (507) comprises a mounting shell (5071), the inner cavities at both ends of the mounting shell (5071) are rotatably connected to gears (5073), the outer walls at both ends of the mounting shell (5071) are fixedly mounted with motors (5072), and the motor (5072) and the gears (5073) are drivingly connected; The gear (5073) is meshed with the meshing teeth (509).

2. A centrifugal fan according to claim 1, characterized in that: The base (1) comprises a bracket (101), the bottoms of both sides of the bracket (101) are fixedly equipped with buffer blocks (102), and the tops of the buffer blocks (102) are fixedly equipped with support plates (103).

3. A centrifugal fan according to claim 1, characterized in that: The housing assembly (2) comprises a housing body (201), a housing 1 (202) being fixedly mounted on a side of the housing body (201) close to the motor (4), a housing 2 (203) being fixedly mounted on a side of the housing body (201) away from the motor (4), an inlet (204) being fixedly mounted on an inner edge of the housing 2 (203), and a flow guide port (205) being fixedly mounted on an outer edge of a side of the inlet (204) close to the motor (4).

4. A centrifugal fan according to claim 1, characterized in that: The outer wall of the centrifugal blade (508) located at the second slide groove (505) is fixedly equipped with a sliding clamping plate (5081), and the centrifugal blade (508) is slidably sleeved on the inner wall of the second slide groove (505) via the sliding clamping plate (5081).

5. A centrifugal fan according to claim 1, characterized in that: The connecting rod (501) is arranged on both sides of the centrifugal blade (508), and a cleaning layer is sleeved on the outer edge of the connecting rod (501), and the cleaning layer is in contact with the outer walls of both sides of the centrifugal blade (508).

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