Silent energy-saving fan

Abstract

The application discloses a kind of mute energy-saving fan, it is related to fan field, the noise pollution is serious to the background technology proposed, traditional blade generates up to 85dB above aerodynamic noise;Ordinary ball bearing friction loss can occupy a part of whole machine energy consumption, and the problem of low energy efficiency, the following scheme is presented, including the aluminum alloy shell being equipped with flange at both ends, the outer polyurethane foam layer is covered outside shell, sound-absorbing layer is arranged in shell, sound-absorbing layer includes fixed ring, inner polyurethane foam layer is covered on the outer wall of fixed ring and two shock-absorbing rubber rings respectively fixedly arranged on the outer wall of fixed ring both ends, flow guide ring is fixedly arranged in fixed ring, foam aluminum is arranged outside flow guide ring, fixed mechanism is arranged in fixed ring, and fixed mechanism includes mounting ring.The application can effectively suppress the noise generated when fan operates, improve the mute effect, can improve motor energy efficiency through the synergistic effect of airflow optimization and vibration reduction, and further reduce noise.

Description

Technical Field

[0001] This invention relates to the field of fans, and more particularly to a quiet and energy-saving fan. Background Technology

[0002] A fan is a machine that uses input mechanical energy to increase gas pressure and discharge gas. It is a type of driven fluid machinery. Fan is a general term for gas compression and gas transportation machinery. Fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling; ventilation and induced draft in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; grain drying and conveying; wind tunnel air source and air filling and propulsion of hovercraft, etc.

[0003] Fans can be classified according to the direction of gas flow, including centrifugal, axial, mixed-flow, and cross-flow types. Centrifugal fans, where the airflow enters the impeller axially and flows mainly radially, are made based on the principle of centrifugal force. Products include centrifugal fans, centrifugal blowers, and centrifugal compressors. Axial fans, where the airflow enters the impeller axially and flows approximately along the axis on a cylindrical surface, are also made based on the principle of centrifugal force. Rotary fans, which use the rotation of a rotor to change the volume of the air chamber, commonly include Roots blowers and rotary compressors.

[0004] Industrial fans have two major pain points during operation: severe noise pollution, with traditional metal blades generating aerodynamic noise of up to 85dB or more; and the friction loss of ordinary ball bearings, which consumes a portion of the overall energy consumption, resulting in low energy efficiency. Summary of the Invention

[0005] This invention provides a quiet and energy-saving fan, which solves the problems of serious noise pollution during operation of existing industrial fans, with traditional metal blades generating aerodynamic noise of up to 85dB or more; and the friction loss of ordinary ball bearings consuming a portion of the overall energy consumption, resulting in low energy efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A quiet and energy-saving fan includes an aluminum alloy shell with flanges at both ends. The outer shell is covered with an outer polyurethane foam layer, and an inner sound-absorbing layer is provided inside the shell. The sound-absorbing layer includes a fixing ring, an inner polyurethane foam layer covering the outer wall of the fixing ring, and two shock-absorbing rubber rings respectively fixed to the outer walls at both ends of the fixing ring. A guide ring is fixed inside the fixing ring, and the guide ring is covered with foamed aluminum. A fixing mechanism is provided inside the fixing ring. The fixing mechanism includes an aluminum alloy mounting ring, several guide vanes with a helix angle of 30°, a heat-insulating partition ring fixed to the outer wall of the guide vanes, and a sub-mounted ring. The projectile-shaped fairing has four circumferentially distributed connecting components on the outer wall of the mounting ring. Each connecting component includes a connecting plate welded to the outer wall of the mounting ring, a fixing plate welded to the outer wall of one end of the connecting plate, a fixing seat with several mounting slots on the outer wall, and several butterfly springs respectively embedded in the mounting slots. An air supply component is provided inside the mounting ring. The air supply component includes a motor, a drive shaft connected to one end of the motor output shaft via a spline, a magnetic levitation bearing sleeved on the outer wall of the drive shaft, a mounting block connected to the outer wall of one end of the drive shaft via a pin, and blades fixed on the outer wall of the mounting block.

[0008] Preferably, the outer wall of the outer shell has grooves that are evenly distributed, and the outer polyurethane foam layer fills several grooves.

[0009] Preferably, the two damping rubber rings are respectively fixed on the inner walls at both ends of the outer shell, and the Shore hardness of the two damping rubber rings is 50A.

[0010] The above solution, combining an outer polyurethane foam layer, an inner polyurethane foam layer, and a shock-absorbing rubber ring, effectively absorbs and blocks the noise generated during the operation of the fan. The outer polyurethane foam layer mainly absorbs external noise, while the inner polyurethane foam layer and the shock-absorbing rubber ring mainly absorb the noise and vibration generated inside the fan.

[0011] Preferably, the front end of the guide ring is a conical structure, the middle part is a straight cylinder, and the tail end is a conical structure, with the inner diameter of the tail end being the same as that of the front end, and the length of the tail end being greater than that of the front end.

[0012] Preferably, the two ends of the aluminum foam abut against the inner walls of the two ends of the guide ring, and the aluminum foam abuts against the inner wall of the fixing ring.

[0013] The above solution utilizes the special shape of the guide ring to facilitate a smooth transition of airflow, promote the full shaping and stabilization of airflow, and improve overall flow efficiency. The foamed aluminum has excellent sound absorption properties, effectively absorbing noise generated by the airflow, thereby reducing noise generation and improving energy efficiency.

[0014] Preferably, several of the guide vanes are made of copper, and several guide vanes are respectively welded to the outer wall of the mounting ring. A motor base is fixed on the inner wall of one end of the mounting ring, and the guide cover is welded to the outer wall of one end of the mounting ring.

[0015] Through the above scheme, the copper guide vanes have excellent thermal conductivity, which helps to dissipate heat and improve the working efficiency of the fan. The guide vanes with a 30° helix angle further optimize the airflow direction, increase the airflow distance, and improve the heat dissipation effect.

[0016] Preferably, a mounting base is welded to the top outer wall of the fixing plate, and a locking block is welded to the top outer wall of the mounting base. A slot is opened on one end of the outer wall of the fixing base, and the locking block is engaged in the slot. Several connecting rods are fixed on one end of the outer wall of the locking block, and the several connecting rods are respectively inserted into several mounting slots. Multiple stacked disc springs are provided in a single mounting slot.

[0017] The above solution effectively absorbs the vibration generated during the operation of the fan by using a butterfly spring, preventing the vibration from being transmitted to the casing and thus reducing noise.

[0018] Preferably, the motor is bolted to the outer wall of one side of the motor base, and a bearing ring is fixed on the inner wall of one end of the flow guide, with the magnetic levitation bearing press-fitted into the bearing ring.

[0019] The above solution, which uses magnetic levitation bearings, greatly reduces mechanical friction, thereby reducing noise and improving energy efficiency.

[0020] The beneficial effects of this invention are as follows:

[0021] The combination of an outer polyurethane foam layer, an inner polyurethane foam layer, and a shock-absorbing rubber ring effectively absorbs and blocks noise generated during fan operation. The special shape of the guide ring helps the airflow transition smoothly, facilitating full airflow shaping and stabilization. The aluminum foam effectively absorbs noise generated by the airflow, thereby reducing noise and improving energy efficiency. The copper guide vanes have excellent thermal conductivity, which helps dissipate heat and improves the working efficiency of the fan. The 30° helix angle guide vanes further optimize the airflow direction, increase the airflow distance, and improve the heat dissipation effect. The disc spring effectively absorbs the vibration generated during fan operation and prevents the vibration from being transmitted to the outer casing, thereby reducing noise. The use of magnetic levitation bearings greatly reduces mechanical friction, which not only reduces noise but also improves energy efficiency.

[0022] In summary, this invention can effectively suppress the noise generated during the operation of the fan, improve the quietness effect, and further reduce noise while improving motor energy efficiency through the synergistic effect of airflow optimization and vibration reduction. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the overall main structure of a silent and energy-saving fan proposed in this invention.

[0024] Figure 2 This is a schematic diagram of the front cross-sectional structure of a silent and energy-saving fan proposed in this invention.

[0025] Figure 3 This is a schematic diagram of the main view cross-sectional structure of the sound-absorbing layer of a silent and energy-saving fan proposed in this invention.

[0026] Figure 4 This is a schematic diagram of the main cross-sectional structure of the guide ring and aluminum foam of a silent and energy-saving fan proposed in this invention.

[0027] Figure 5 This is a front sectional view of the fixing mechanism of a silent and energy-saving fan proposed in this invention.

[0028] Figure 6 This is a schematic diagram of the main structure of a partial fixing mechanism of a silent and energy-saving fan proposed in this invention.

[0029] Figure 7 This is a schematic diagram of the main cross-sectional structure of the connection component of a silent and energy-saving fan proposed in this invention.

[0030] Figure 8 The present invention proposes Figure 7 Enlarged structural diagram at point A in the middle.

[0031] Figure 9 This is a schematic diagram of the main structure of some connecting components of a silent and energy-saving fan proposed in this invention.

[0032] Figure 10 This is a schematic diagram of the main cross-sectional structure of the air supply component of a silent and energy-saving fan proposed in this invention.

[0033] In the diagram: 1. Outer shell; 2. Outer polyurethane foam layer; 3. Sound-absorbing layer; 301. Fixing ring; 302. Inner polyurethane foam layer; 303. Vibration-damping rubber ring; 4. Guide ring; 5. Aluminum foam; 6. Fixing mechanism; 601. Mounting ring; 602. Guide blade; 603. Heat insulation separation ring; 604. Motor base; 605. Guide cover; 7. Connecting assembly; 701. Connecting plate; 702. Fixing plate; 703. Mounting seat; 704. Locking block; 705. Connecting rod; 706. Fixing seat; 707. Butterfly spring; 8. Air supply assembly; 801. Motor; 802. Drive shaft; 803. Magnetic levitation bearing; 804. Bearing ring; 805. Mounting block; 806. Blade. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Example 1, referring to Figure 1-4 A quiet and energy-saving fan includes an aluminum alloy shell 1 with flanges at both ends. The shell 1 is covered with an outer polyurethane foam layer 2. The outer wall of the shell 1 has grooves evenly distributed, and the outer polyurethane foam layer 2 fills several grooves. The shell 1 has a sound-absorbing layer 3 inside, which includes a fixing ring 301, an inner polyurethane foam layer 302 covering the outer wall of the fixing ring 301, and two damping rubber rings 303 respectively fixed to the outer walls at both ends of the fixing ring 301. The two damping rubber rings 303 are respectively fixed to the inner walls at both ends of the shell 1. The two damping rubber rings 303 have a Shore hardness of 50A. A flow guide ring 4 is fixed inside the fixing ring 301. The flow guide ring 4 has a conical front end, a straight middle section, and a conical tail end. The inner diameter of the tail end is the same as the inner diameter of the front end, and the length of the tail end is greater than the length of the front end. The flow guide ring 4 is covered with aluminum foam 5, which fills the space between the fixing ring 301 and the flow guide ring 4.

[0036] Example 2, refer to Figure 5-6 A quiet and energy-saving fan also includes a fixing mechanism 6, which includes an aluminum alloy mounting ring 601, several guide vanes 602 with a helix angle of 30°, a heat-insulating partition ring 603 fixed to the outer wall of the guide vanes 602, and a bullet-shaped guide shroud 605. The guide vanes 602 are made of copper, and the guide vanes 602 near the air inlet of the fan can be designed as an arc structure to further optimize airflow. The guide vanes 602 are respectively welded to the outer wall of the mounting ring 601. A motor base 604 is fixed to the inner wall of one end of the mounting ring 601. The guide shroud 605 is welded to the outer wall of one end of the mounting ring 601. The guide vanes 602 are made of copper, and the guide vanes 602 are respectively welded to the outer wall of the mounting ring 601. A motor base 604 is fixed to the inner wall of one end of the mounting ring 601. The guide shroud 605 is welded to the outer wall of one end of the mounting ring 601.

[0037] Example 3, referring to Figure 7-9A quiet and energy-saving fan also includes four circumferentially distributed connecting components 7. The connecting components 7 include a connecting plate 701 welded to the outer wall of the mounting ring 601, a fixing plate 702 welded to the outer wall of one end of the connecting plate 701, a fixing seat 706 with several mounting slots on its outer wall, and several butterfly springs 707 respectively embedded in the mounting slots. A mounting seat 703 is welded to the top outer wall of the fixing plate 702, and a locking block 704 is welded to the top outer wall of the mounting seat 703. A locking groove is opened on the outer wall of one end of the fixing seat 706, and the locking block 704 is locked in the locking groove. Several connecting rods 705 are fixed on the outer wall of one end of the locking block 704. The several connecting rods 705 are respectively inserted into the several mounting slots. Multiple stacked butterfly springs 707 are provided in a single mounting slot.

[0038] Example 4, refer to Figure 10 A quiet and energy-saving fan also includes an air supply assembly 8, which includes a motor 801, a drive shaft 802 connected to one end of the output shaft of the motor 801 via a spline, a magnetic levitation bearing 803 sleeved on the outer wall of the drive shaft 802, a mounting block 805 connected to the outer wall of one end of the drive shaft 802 via a pin, and blades 806 fixed on the outer wall of the mounting block 805. The motor 801 is bolted to the outer wall of one side of the motor base 604. Thermal conductive gel can be filled between the motor 801 and the mounting ring 601 to further improve the heat dissipation effect of the motor 801. A bearing ring 804 is fixed on the inner wall of one end of the air guide 605, and the magnetic levitation bearing 803 is press-fitted into the bearing ring 804.

[0039] Motor 801 drives the transmission shaft 802 supported by magnetic levitation bearing 803 to rotate blade 806. The airflow is accelerated through the front cone section of guide ring 4. At the same time, the heat generated by motor 801 is transferred to mounting ring 601 and multiple guide blades 602. The guide shroud 605 guides part of the airflow between mounting ring 601 and heat insulation partition ring 603 and flows along the outer wall of guide blade 602 to dissipate heat from motor 801. Most of the airflow flows between guide ring 4 and heat insulation partition ring 603. Aerodynamic noise is gradually attenuated by sound absorption layer 3. High-frequency sound waves are dissipated by aluminum foam 5. Mid-frequency vibration is absorbed by inner polyurethane foam layer 302. Low-frequency resonance is suppressed by shock-absorbing rubber ring 303. The vibration generated by motor 801 and blade 806 during operation is absorbed by disc spring 707 to suppress vibration. The airflow is pressurized and output from the tail cone section of guide ring 4.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A silent energy-saving fan comprising an aluminum alloy shell (1) with flanges at both ends, characterized in that, The outer shell (1) is externally covered with an outer polyurethane foam layer (2), the outer shell (1) is internally provided with an acoustic absorption layer (3), the acoustic absorption layer (3) comprises a fixing ring (301), an inner polyurethane foam layer (302) wrapped on the outer wall of the fixing ring (301), and two damping rubber rings (303) fixedly arranged on the outer walls of the two ends of the fixing ring (301) respectively. The fixing ring (301) is internally fixedly provided with a flow guide ring (4), and the flow guide ring (4) is externally provided with a foam aluminum (5). The fixing ring (301) is internally provided with a fixing mechanism (6), the fixing mechanism (6) comprises an aluminum alloy mounting ring (601), a plurality of flow guide vanes (602) with a helix angle of 30°, a heat insulation partition ring (603) fixedly arranged on the outer wall of the plurality of flow guide vanes (602), and a bullet-shaped flow guide cover (605). The outer wall of the mounting ring (601) is provided with four circumferentially distributed connecting assemblies (7), the connecting assembly (7) comprises a connecting plate (701) welded on the outer wall of the mounting ring (601), a fixing plate (702) welded on the outer wall of one end of the connecting plate (701), a fixing seat (706) with a plurality of mounting grooves opened on the outer wall, and a plurality of butterfly springs (707) respectively embedded in the mounting grooves. The mounting ring (601) is internally provided with a air supply assembly (8), the air supply assembly (8) comprises a motor (801), a transmission shaft (802) connected to one end of the output shaft of the motor (801) through a spline, a magnetic suspension bearing (803) sleeved on the outer wall of the transmission shaft (802), a mounting block (805) connected to the outer wall of one end of the transmission shaft (802) through a pin shaft, and a vane (806) fixedly arranged on the outer wall of the mounting block (805).

2. A silent energy efficient fan as claimed in claim 1, wherein The outer wall of the outer shell (1) is provided with equidistantly distributed grooves, and the outer polyurethane foam layer (2) is filled in the plurality of grooves.

3. A silent energy efficient fan as claimed in claim 1 wherein, The two damping rubber rings (303) are fixedly arranged on the inner walls of the two ends of the outer shell (1) respectively, and the Shore hardness of the two damping rubber rings (303) is 50A.

4. A silent energy efficient fan as claimed in claim 1 wherein, The front end of the flow guide ring (4) is a conical structure, the middle part is a straight cylinder, and the tail end is a conical structure, the inner diameter of the tail end is the same as that of the front end, and the length of the tail end is greater than that of the front end.

5. A silent energy efficient fan as claimed in claim 1 wherein, The two ends of the foam aluminum (5) abut against the inner walls of the two ends of the flow guide ring (4) respectively, and the foam aluminum (5) abuts against the inner wall of the fixing ring (301).

6. A silent energy efficient fan as claimed in claim 1 wherein, The plurality of flow guide vanes (602) are made of copper, and the plurality of flow guide vanes (602) are welded on the outer wall of the mounting ring (601), the motor seat (604) is fixedly arranged on the inner wall of one end of the mounting ring (601), and the flow guide cover (605) is welded on the outer wall of one end of the mounting ring (601).

7. A silent energy efficient fan as claimed in claim 1 wherein, The outer wall of the top of the fixed plate (702) is welded with a mounting seat (703), and the outer wall of the top of the mounting seat (703) is welded with a clamping block (704); the outer wall of one end of the fixed seat (706) is provided with a clamping groove, and the clamping block (704) is clamped in the clamping groove; the outer wall of one end of the clamping block (704) is fixedly provided with a plurality of connecting rods (705), and the plurality of connecting rods (705) are respectively inserted into a plurality of mounting grooves; a plurality of stacked butterfly springs (707) are arranged in a single mounting groove.

8. A silent energy efficient fan as claimed in claim 6 wherein, The motor (801) is connected to one side of the motor base (604) through bolts, and the inner wall of one end of the flow guide cover (605) is fixedly provided with a bearing ring (804), and the magnetic suspension bearing (803) is press-fitted in the bearing ring (804).

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