Fan blade device capable of reducing noise

Abstract

The utility model belongs to the technical field of fans, and discloses a noise reduction fan blade device which comprises an installation shaft head, a plurality of fan blades are arranged on the outer surface of the installation shaft head in an annular array mode, the fan blades are arranged at a certain inclination angle, each fan blade comprises a fan blade plate, a noise reduction plate is detachably installed on one side edge of each fan blade plate, and the noise reduction plate is arranged on the other side edge of each fan blade plate. Concave parts and convex parts which are distributed in a staggered manner are arranged on one side edge of the silencing plate; the fan is simple in overall structure, noise influence can be reduced in the using process of the fan, meanwhile, replacement is convenient, and the using effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fan technical field, specifically, relate to a fan blade device of noise reduction and sound elimination. BACKGROUND

[0002] With the increasing demand for fan performance in industrial production and civil equipment, reducing the noise pollution of fan operation has become a key problem to be solved. Fan noise mainly comes from aerodynamic noise, mechanical noise and electromagnetic noise, among which aerodynamic noise dominates, especially the vortex noise and pressure pulsation noise generated by the interaction of fan blade rotation and air. Traditional fan blade design usually adopts smooth surface, but this design is prone to strong turbulence and separation vortex at high speed, resulting in obvious noise radiation.

[0003] To solve this problem, the industry has made many explorations in fan blade noise reduction technology, among which the zigzag blade is widely used as an effective noise reduction method. The zigzag structure sets periodic notches on the edge of the blade, which destroys the continuity of air flow, makes the vortex shed at the zigzag edge and disperses, thereby weakening the strength and frequency concentration of the vortex noise. In addition, the zigzag structure can also change the propagation path of pressure pulsation, reduce the reflection and superposition effect of pressure wave, and further suppress the generation of noise. Experimental studies have shown that the zigzag blade can achieve a noise reduction effect of 3-8 decibels under certain working conditions, significantly improving the acoustic performance of the fan.

[0004] Although the zigzag blade shows significant advantages in noise reduction, it still faces many technical bottlenecks in engineering application, limiting its further promotion and optimization: first, the structural strength and durability are insufficient, the introduction of zigzag structure weakens the mechanical strength of the blade edge, leading to fatigue fracture under high load conditions. Especially at high speed, the coupling effect of centrifugal force, aerodynamic force and vibration load will accelerate the stress concentration at the zigzag edge, and then cause crack propagation and material failure. In addition, the scouring and wear of the zigzag edge by particles in the air (such as dust and sand) during flow will further aggravate the structural damage and shorten the service life of the blade; second, the maintenance cost is high and the replacement is difficult, the zigzag structure of the zigzag blade is usually integrally formed with the blade body, once the zigzag edge is damaged (such as fracture, wear), the blade needs to be replaced as a whole, resulting in a significant increase in maintenance cost. For large fans or equipment under special working conditions, blade replacement often requires shutdown operation, affecting production continuity. In addition, the integrated design also limits the flexible optimization of the zigzag structure, making it difficult to quickly adjust to different working condition requirements.

[0005] A patent with the application number CN202420129794.0 discloses a large-flow centrifugal fan blade, belonging to the technical field of fans. The large-flow centrifugal fan blade comprises a mounting base, a protective net and a plurality of screws. A plurality of through holes matched with the screws are formed in one end of the mounting base, and a servo motor is mounted at the inner end of the mounting base. An installation assembly is arranged at the output end of the servo motor. A fan blade assembly is arranged at the outer end of the installation assembly. The installation assembly comprises an installation block which is fixedly connected with the output end of the servo motor. The detachable arrangement of the plurality of fan blades and the assembly block provides convenience for users to detach the fan blades when cleaning the fan. The plurality of fan blades can be cleaned individually, reducing the cleaning difficulty. Compared with the integrally formed fan blade, the fan blade which can be detached individually reduces the sanitary dead angle, making the cleaning more thorough. When a certain fan blade is damaged, the damaged fan blade can be replaced individually, effectively reducing the maintenance cost and improving the service life of the device.

[0006] However, the fan blade is prone to causing noise during use, which can cause physical damage to the workers after long-term use. The utility model discloses a fan blade device of noise reduction and sound elimination which has a simple overall structure, can reduce noise during use, is convenient to replace and improves use effect.

[0007] The utility model discloses a fan blade device of noise reduction and sound elimination which has a simple overall structure, can reduce noise during use, is convenient to replace and improves use effect.

[0008] To solve the above technical problems, the utility model provides the following technical scheme:

[0009] A fan blade device of noise reduction and sound elimination, comprising a mounting shaft head, a plurality of fan blades are arranged in a ring array on the outer surface of the mounting shaft head, and the plurality of fan blades are arranged at a certain inclination angle. The fan blade comprises a fan blade plate, a sound elimination plate is detachably mounted on one side of the fan blade plate, and a recess and a convex part are arranged in a staggered manner on one side of the sound elimination plate.

[0010] The utility model further optimizes the above technical scheme as follows:

[0011] The fan blade plate is fixedly installed on the outer surface of the mounting shaft head, and the plurality of fan blade plates are arranged in a ring array along the outer surface of the mounting shaft head.

[0012] Further optimization: a square groove is formed at one side of the fan blade plate, and the depth of the square groove is 1-1.5 mm.

[0013] Further optimization: two first positioning holes are formed in a linear array on the groove bottom surface of the square groove, and two screw holes are arranged at intervals between the two first positioning holes.

[0014] Further optimization: the thickness of the sound elimination plate is 1-1.5 mm.

[0015] Further optimization: the second positioning hole is arranged on the soundproof plate corresponding to the two first positioning holes, and the size of the second positioning hole is the same as that of the first positioning hole.

[0016] Further optimization: the through hole is arranged on the soundproof plate corresponding to the two threaded holes, and the size of the two through holes matches the size of the two threaded holes.

[0017] Further optimization: the first positioning hole and the corresponding second positioning hole are inserted with the same positioning pin.

[0018] Further optimization: the through hole and the corresponding threaded hole are provided with the same flat head bolt.

[0019] Further optimization: the soundproof plate is made of aluminum alloy material.

[0020] The utility model discloses the above-mentioned technical scheme, clever design, reasonable structure can reduce the noise brought by fan blade rotation in the use of fan, and when the soundproof plate needs to be replaced because the noise reduction effect is influenced when being damaged, only needs to loosen the flat head bolt of fixed soundproof plate, takes down the positioning pin of positioning soundproof plate, and then replaces the soundproof plate without damage, under the action of positioning pin, does not need to adjust the installation position, guarantees the noise reduction effect of soundproof plate, convenient operation, reduces use and maintenance cost.

[0021] The utility model is further illustrated below in connection with the drawings and examples. DRAWINGS

[0022] Figure 1 It is the schematic diagram of the whole structure in the embodiment of the utility model;

[0023] Figure 2 It is the structural schematic diagram of fan blade in the embodiment of the utility model;

[0024] Figure 3 It is the structural schematic diagram of fan blade in the embodiment of the utility model;

[0025] Figure 4 It is the structural schematic diagram of soundproof plate in the embodiment of the utility model.

[0026] In the drawing: 1, mounting shaft head;2, fan blade;21, fan blade plate;210, square groove;211, first positioning hole;212, threaded hole;22, soundproof plate;220, recess;221, convex part;222, second positioning hole;223, through hole;23, positioning pin;24, flat head bolt. CONCRETE IMPLEMENTING METHOD

[0027] As Figures 1-4As shown: a fan blade device of noise reduction and sound elimination, comprising a mounting shaft head 1, a plurality of fan blades 2 arranged in a ring array on the outer surface of the mounting shaft head 1, the plurality of fan blades 2 are arranged at a certain inclination angle, the fan blade comprises a fan blade plate 21, a sound elimination plate 22 is detachably mounted on one side of the fan blade plate 21, and a staggered recess 220 and a convex part 221 are arranged on one side of the sound elimination plate 22.

[0028] In this embodiment, the mounting shaft head 1 is fixedly connected with the power output shaft of the motor in the fan, and the specific mounting mode is the prior art, which will not be described here. In this way, when the motor starts, the power output shaft of the motor rotates and drives the shaft head 1 to rotate, thereby driving the fan to work.

[0029] The fan blade plate 21 is fixedly installed on the outer surface of the mounting shaft head 1, and a plurality of fan blade plates 21 are arranged in a ring array along the outer surface of the mounting shaft head 1.

[0030] A plurality of fan blade plates 21 are arranged at a certain inclination angle with the outer surface of the mounting shaft head 1, and the mounting mode of the fan blade plate 21 is a commonly used mounting mode in the fan, which will not be described here.

[0031] As shown in the figure, Figure 2 A square groove 210 is formed on one side of the fan blade plate 21, and the depth of the square groove 210 is 1.5mm.

[0032] Two first positioning holes 211 are arranged in a linear array on the groove bottom surface of the square groove 210.

[0033] Two screw holes 212 are arranged at intervals between the two first positioning holes 211.

[0034] As shown in the figure, Figure 4 The thickness of the sound elimination plate 22 is 1.5mm.

[0035] Second positioning holes 222 are formed on the sound elimination plate 22 corresponding to the two first positioning holes 211.

[0036] The size of the second positioning hole 222 is the same as that of the first positioning hole 211.

[0037] Through holes 223 are formed on the sound elimination plate 22 corresponding to the two screw holes 212.

[0038] The size of the two through holes 223 matches the size of the two screw holes 212.

[0039] The same positioning pin 23 is inserted into the first positioning hole 211 and the corresponding second positioning hole 222.

[0040] The through hole 223 and the corresponding threaded hole 212 are provided with the same flat head bolt 24, that is, the flat head bolt 24 is screwed in the threaded hole 212 after penetrating the through hole 223.

[0041] In this way, the soundproof plate 22 is accurately installed on the fan plate 21 through the positioning nails 23, and then is locked through the flat head bolts 24. When the soundproof plate 22 needs to be replaced, quick and accurate installation can be realized without adjusting the position.

[0042] The recess 220 and the convex part 221 are connected in a head-to-tail mode to form a flow guide groove, so that the airflow is segmented, thereby achieving the noise reduction effect.

[0043] The soundproof plate 22 is made of aluminum alloy material.

[0044] For those skilled in the art, according to the teaching of the present application, the changes, modifications, replacements and deformations made to the embodiments without departing from the principles and spirits of the present application still fall within the protection scope of the present application.

Claims

1. A noise reduction silencing fan blade device comprising a mounting shaft head (1), characterized in that: The outer surface of the mounting shaft head (1) is annularly arranged with a plurality of fan blades (2) arranged at a certain inclination angle, the fan blade (2) comprising a fan blade plate (21), and a sound-absorbing plate (22) is detachably mounted on one side of the fan blade plate (21), and the sound-absorbing plate (22) is provided with staggered recesses (220) and protrusions (221) on one side.

2. A fan blade apparatus according to claim 1, wherein: The fan blade plate (21) is fixedly mounted on the outer surface of the mounting shaft head (1), and a plurality of fan blade plates (21) are annularly arranged along the outer surface of the mounting shaft head (1).

3. A fan blade apparatus according to claim 2, wherein: A square groove (210) is formed at one side of the fan blade plate (21), and the depth of the square groove (210) is 1-1.5mm.

4. The fan blade apparatus of claim 3, wherein: Two first positioning holes (211) are linearly arranged on the bottom surface of the square groove (210), and two threaded holes (212) are arranged at intervals between the two first positioning holes (211).

5. A fan blade apparatus according to claim 4, wherein: The thickness of the sound-absorbing plate (22) is 1-1.5mm.

6. A fan blade apparatus according to claim 5, wherein: Second positioning holes (222) are formed on the sound-absorbing plate (22) corresponding to the two first positioning holes (211), and the size of the second positioning holes (222) is the same as that of the first positioning holes (211).

7. A fan blade apparatus according to claim 6, wherein: Through holes (223) are formed on the sound-absorbing plate (22) corresponding to the two threaded holes (212), and the size of the two through holes (223) matches that of the two threaded holes (212).

8. A fan blade apparatus according to claim 7, wherein: The same positioning pin (23) is inserted into the first positioning hole (211) and the corresponding second positioning hole (222).

9. A fan blade apparatus according to claim 8, wherein: The same flat head bolt (24) is arranged in the through hole (223) and the corresponding threaded hole (212).

10. The fan blade apparatus of claim 9, wherein: The sound-absorbing plate (22) is made of aluminum alloy material.

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