CN101117969B - Vibration-proof structure of series fan - Google Patents

Abstract

The invention relates to a vibration-avoiding structure of series fans. The series fan at least comprises two fan frames, a vibration-proof component is arranged between the surfaces of the fan frames connected in series, and the vibration-proof component is made of an elastic material which can absorb vibration and buffer vibration. When the impeller rotors in the fan frame rotate, the vibration fundamental frequency of the two impeller rotors can be buffered and absorbed by the vibration-avoiding component, so that the serious resonance effect and vibration noise caused by interaction are avoided, and the optimal efficiency and the service life of the system are maintained.

Description

Vibration-absorbing structure of serial fans

technical field

The invention relates to a vibration-proof structure of a serial fan, in particular to a vibration-proof structure of a serial fan which can solve the resonance effect caused by the operation of more than two fan wheel rotors after multiple fans are connected in series.

Background technique

The static pressure generated by two or more fans connected in series can reach twice under the condition of zero air volume, and adding one more fan in series can increase the air volume in a system with higher static pressure. Good cooling effect.

The fan will definitely vibrate when it is running, but the strength and weakness are different. Generally speaking, the higher the static pressure and the larger the fan, the more serious the vibration will be, and the vibration will not only produce noise, but also reduce system stability. , leading to premature fatigue and aging of the contacts of electronic components inside the system, shortening the life of the system.

As shown in FIG. 1 , the serial fan includes at least two fan frames 10 , and the two fan frames 10 are respectively provided with corresponding buckle portions 11 and buckle grooves 12 , so that the two fan frames 10 can be connected in series.

The inside of the fan frame 10 is a hollow accommodation space, which can be used to place a fan wheel rotor (not shown in the figure), and one end surface of the accommodation space is provided with a base 13, and the base 13 is connected to the fan frame 10 through ribs 14. Connect into one. Among them, the base 13 can be used to assemble a driving device (not shown in the figure, the operation relationship between the fan wheel rotor and the driving device is a known technology, and has no direct relationship with this case, and will not be described in detail herein), so as to drive the fan wheel rotor Rotating operation, the holes between the ribs 14 are passages for air flow.

The above-mentioned commonly used serial fans are directly connected in series between the two fan frames 10, so there are the following disadvantages:

1. After the two fan frames 10 are connected in series, the resonance situation is serious: the design principle of the motor torque operation itself will inevitably produce vibration, especially for the series fan, when the fan wheel rotors inside the two fan frames 10 rotate at the same time, the vibration of the second fan wheel rotor Under the mutual influence of the fundamental frequency, the two fan frames 10 will have a serious resonance effect, and this resonance effect will be directly transmitted and affect the system, resulting in the system not being able to perform its best performance.

2. The life of the system is shortened by the resonance effect: the resonance effect will not only affect the efficacy of the entire system, but also accelerate the premature fatigue and aging of the contacts of the internal electronic components when the system is in a vibrating environment for a long time, shortening the life of the system.

3. Serious vibration and noise: the resonance effect is also accompanied by huge noise, which has a great impact on the overall noise value evaluation of the system.

Therefore, in order to completely solve the above-mentioned resonance problem of the series fan frame and maintain the best performance and life of the system, more active buffering and vibration-avoiding measures must be taken to reduce the vibration fundamental frequency of the series fan frame and prevent the fan wheel rotor from running The amount of vibration interacts and is transmitted, therefore, it is urgent to actively develop a vibration-absorbing structure for series fans.

Contents of the invention

In view of the above problems, the main purpose of the present invention is to provide a vibration isolation structure for series fans, which can solve the resonance effect caused by the operation of more than two fan wheel rotors.

In order to achieve the above purpose, the present invention provides a vibration isolation structure for a serial fan, the serial fan includes at least two fan frames, and it is characterized in that: a vibration isolation component is provided between the surfaces of the fan frames connected in series, And the vibration-absorbing component must be made of elastic material that can absorb vibration and buffer vibration.

In the above-mentioned technical solution of the present invention, the material of the vibration-absorbing component can be one of rubber, foam, sponge or urethane glue.

In the above-mentioned technical solution of the present invention, the shape of the vibration-isolating component is a shape corresponding to the joint surface of the fan frame.

In the above-mentioned technical solution of the present invention, the inside of the fan frame is provided with an accommodating space for inserting the fan wheel rotor, and a base is provided at one end of the accommodating space, and the base is connected to the The fan frame is connected into one body, and a driving device is installed on the base to drive the fan wheel rotor to rotate.

In the above-mentioned technical solution of the present invention, the shape of the vibration-absorbing component corresponds to the shape of the base and is smaller than the base, and the outer end surface of the base is provided with a shallow groove for the vibration-proof Component placement.

In the above-mentioned technical solution of the present invention, the fan frames are respectively provided with corresponding buckle portions and buckle grooves for series connection.

By adopting the above technical scheme, when the fan wheel rotor inside the fan frame is running, the present invention utilizes the vibration-absorbing characteristics of the vibration-absorbing component to reduce the vibration fundamental frequency of the two-fan wheel rotor, and buffer and absorb the vibration amount to avoid the vibration of the second-fan wheel rotor. The mutual influence of vibration fundamental frequency avoids serious resonance effect and vibration noise, and maintains the best efficacy and life of the system.

Description of drawings

Fig. 1 is the exploded schematic view of conventional structure;

Fig. 2 is an exploded schematic view of the first embodiment of the present invention;

Fig. 3 is an exploded schematic view of the second embodiment of the present invention.

Detailed ways

The invention relates to a vibration isolation structure of a serial fan, wherein the serial fan is composed of at least two fans connected in series, and a vibration isolation component is arranged at the junction of each adjacent fan frame, and the vibration isolation component itself is used for buffering and Absorb vibration characteristics, isolate and reduce the vibration fundamental frequency of series fans.

In the following, two embodiments in which the present invention is actually applied in series with dual fans are listed and described with reference to the accompanying drawings.

As shown in Figure 2, the serial fan implemented in the present invention includes at least two fan frames 10, and the two fan frames 10 are respectively provided with corresponding buckle parts 11 and buckle grooves 12, so that the two fan frames 10 can be connected in series. switch combination.

The inside of the fan frame 10 is a hollow accommodation space, in which a fan wheel rotor (not shown in the figure) is arranged, and a base 13 is provided on one end surface of the accommodation space, and the base 13 is connected with the fan frame 10 by ribs 14 to form a One body, wherein, the base 13 can be equipped with a driving device (not shown in the figure) to drive the fan wheel rotor to rotate, and the holes between the ribs 14 are channels for air flow.

In the present invention, a vibration-isolating assembly 20 is provided between the surfaces where the two fan frames 10 are connected in series. A shallow groove 21 is formed on the outer surface of the base 13 , so that the vibration-isolating component 20 can be accommodated between the two shallow grooves 21 and clamped and fixed by the two bases 13 .

The anti-vibration assembly 20 must be made of an elastic material that has both vibration absorption and vibration buffering properties, such as rubber, foam, sponge, and Uril. The vibration generated by the rotation of the fan wheel rotors can be absorbed, isolated and buffered by the vibration isolation assembly 20, so that the vibration fundamental frequencies of the two fan wheel rotors will not interact with each other, avoiding resonance effects and noise.

After the test, the series fan with the conventional structure is based on the input speed of 15000rpm and the output speed of 14000rpm. The measured vibration test value is:

The vibration velocity value is Acc_0.5G: 0.00947m/s

The vibration acceleration value is Acc_0.5G: 17.2m/(s2)

The present invention is based on the serial fan with the same structure as the conventional one, with the input speed of 15000rpm and the output speed of 14000rpm as the benchmark, and the measured vibration test value is:

The vibration velocity value is Acc_0.5G: 0.00349m/s

The vibration acceleration value is Acc_0.5G: 8.89m/(s2)

From the above test results, it can be seen that the vibration isolation assembly 20 of the present invention reduces the overall vibration speed of the series fan by 63%, and the vibration acceleration by 48%. Therefore, the present invention can indeed effectively isolate and buffer the fundamental vibration frequency of the two-fan wheel rotor. The vibration fundamental frequency of the two fan wheel rotors will not interact with each other, avoiding resonance effects and noise.

In addition, as shown in FIG. 3 , it is another embodiment of the present invention. The vibration isolation assembly 22 is also arranged between the faces of the two fan frames 10 connected in series, and the shape of the vibration isolation assembly 22 is corresponding to that of the two fan frames. The shape of the joint surface of the frame 10 is such that when the two fan frames 10 are connected in series, the vibration-isolating assembly 22 can be clamped and fixed at the same time to absorb, isolate, and buffer the fundamental vibration frequency of the two fan wheel rotors, and avoid serious resonance effects caused by interaction.

Comparing the anti-vibration structure of the series fan of the present invention with the aforementioned conventional structure, it can be known that the features of the present invention at least include:

1. Vibration slowing and no resonance effect: The present invention adopts positive buffering and vibration-proof measures, and installs vibration-proof components at the joints of adjacent fan frames, and utilizes the buffering and vibration-absorbing characteristics of the vibration-proof components themselves to isolate and reduce the vibration in series. The fundamental vibration frequency of the fan avoids severe resonance of the fan due to the interaction of the fundamental vibration frequency.

2. Maintain the best performance and life of the system: the vibration-absorbing component can buffer and absorb the vibration fundamental frequency of the series-connected fans to avoid resonance effects. Therefore, when the system is no longer affected by the vibration of the fan wheel rotor, the system can be fully utilized Optimum performance and maintenance of normal service life.

3. No resonance noise: The vibration isolation component can not only isolate and buffer vibration, but also prevent the system from generating resonance effect, thereby avoiding resonance noise.

The above descriptions are only preferred implementation forms of the present invention, and all equivalent structural changes made by using the specification, claims or drawings of the present invention shall be included in the scope of patent protection of the present invention.

Claims (6)

1. A vibration-proof structure of a serial fan, the serial fan at least includes two fan frames, and is characterized in that: the surface and the surface of the serial connection of the fan frames are respectively provided with a base, and the base is connected to the fan frame through a rib The frames are connected into one body, and the vibration-absorbing components are arranged between the surfaces of the fan frames connected in series, and the vibration-absorbing components must be made of elastic materials capable of absorbing and buffering vibrations. 2. The anti-vibration structure of the serial fan according to claim 1, characterized in that: the material of the anti-vibration component can be one of rubber, foam, sponge or urethane. 3 . The vibration isolation structure for series fans according to claim 1 , wherein the vibration isolation assembly has a shape corresponding to a joint surface of a fan frame. 4 . 4. The anti-vibration structure of the serial fan according to claim 1, wherein the inside of the fan frame is provided with an accommodating space for inserting the fan wheel rotor, and a driving device is mounted on the base to drive The fan wheel rotor rotates. 5. The anti-vibration structure of the series fan according to claim 4, wherein the shape of the anti-vibration assembly corresponds to the shape of the base and is smaller than the base, and the outer end surface of the base is provided with The shallow groove is used for placing the vibration-absorbing component. 6 . The vibration isolation structure of series-connected fans according to claim 1 , wherein the fan frames are respectively provided with corresponding buckle portions and buckle grooves for series connection. 6 .

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