Cabinet fan vibration damping device

Abstract

The present invention provides a vibration damping device for a box body fan, belonging to the technical field of vibration elimination, including: a vibration damping pad, a base, a plurality of limiting columns and a vibration damping component. The vibration damping pad is used for positioning on a support foundation. The base is arranged on the vibration damping pad, and the motor is installed on the base. The plurality of limiting columns are all vertically arranged and are slidably matched with the base, and the plurality of limiting columns cooperate to enable the base to have only the freedom of vibration in the vertical direction. The vibration damping component abuts against the bottom surface of the base, and the vibration damping component cooperates with the vibration damping pad to balance the acting force of the motor on the base for reducing the vibration of the base. The vibration damping device for the box body fan provided by the present invention limits the vibration direction of the base through a plurality of limiting columns, and finally reduces the vibration degree of the base through the vibration damping component, ensuring the stability of the base.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration elimination, and more specifically, relates to a vibration damping device for a box fan. Background Art

[0002] Since the new coking plant of the company was put into production, the fans at the belt gallery of the coal preparation system and the dust collector in the crusher workshop have tripped and stopped continuously due to large vibrations, ultimately causing environmental pollution accidents and a very poor working environment for workers. In addition, the connecting bolts between the fan bearing seat and the box body often loosen, even shear and shift due to large vibrations, resulting in accident shutdowns. The fan is driven by a motor, and in the current usage scenario, both the motor and the fan are supported by a base. The fan is positioned on one side of the base with the help of the motor, and the vibrations of both the fan and the motor will ultimately act on the base. Therefore, how to reduce the vibration of the fan and ensure the stable and normal operation of the fan is an urgent problem to be solved at present. Summary of the Invention

[0003] The purpose of the present invention is to provide a vibration damping device for a box fan, aiming to solve the problem of how to reduce the vibration of the base under the action of the motor and the fan.

[0004] To achieve the above object, the technical solution adopted by the present invention is: providing a vibration damping device for a box fan, including:

[0005] A vibration damping pad for positioning on a support foundation;

[0006] A base provided on the vibration damping pad, and the base is used for installing a motor;

[0007] A plurality of limiting columns, all vertically arranged and slidably matched with the base, and the plurality of limiting columns cooperate to enable the base to have only the degree of freedom of vibrating in the vertical direction;

[0008] A vibration damping component, the vibration damping component abuts against the bottom surface of the base, and the vibration damping component cooperates with the vibration damping pad to balance the acting force of the motor on the base for reducing the vibration of the base.

[0009] In a possible implementation manner, a strengthening frame is installed in the base.

[0010] In a possible implementation manner, the plurality of limiting columns are parallel to each other and arranged along the circumferential direction of the base.

[0011] In a possible implementation manner, the base is bonded to the vibration damping pad.

[0012] In a possible implementation manner, a cavity is provided in the vibration damping pad, hydraulic oil is filled in the cavity, and the vibration damping component includes a power pump, and the power pump communicates with the cavity and changes the hydraulic pressure of the hydraulic oil to generate an acting force on the base.

[0013] In a possible implementation, a connecting ring is fixed to the bottom of the base, a connecting cover is slidably arranged on the connecting ring, a cavity is formed between the inner cavities of the connecting ring and the connecting cover, and the hydraulic oil is filled in the connecting ring and the connecting cover.

[0014] In a possible implementation, the inner diameter of the top of the connecting cover is larger than that of the bottom.

[0015] In a possible implementation, the connecting ring is hermetically sleeved on the outer side of the connecting cover, and a limiting ring is arranged on the inner wall of the bottom of the connecting ring, and the limiting ring extends towards the connecting cover to prevent the connecting cover from slipping off.

[0016] In a possible implementation, the limiting ring and the connecting ring are integrally formed.

[0017] In a possible implementation, a damping ring is arranged between the bottom of the base and the connecting cover.

[0018] The beneficial effect of the box fan damping device provided by the present invention is that: compared with the prior art, in the box fan damping device of the present invention, the damping pad is positioned on the support foundation, a base is arranged on the damping pad, and the motor is installed on the base. A plurality of limiting columns are all vertically arranged, and by making the plurality of limiting columns slidably cooperate with the base, the base has only the degree of freedom of vertical vibration when the motor is running. In order to reduce vibration, the vibration damping component abuts against the bottom surface of the base, and the vibration damping component cooperates with the damping pad to balance the acting force of the motor on the base. In this application, the vibration direction of the base is limited by a plurality of limiting columns, and finally the vibration degree of the base is reduced by the vibration damping component, ensuring the stability of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the box fan damping device provided by the embodiment of the present invention;

[0021] Figure 2 For Figure 1 a partial enlarged view at A in

[0022] Figure 3 It is a schematic connection diagram of the limiting column and the damping pad provided by the embodiment of the present invention.

[0023] In the figure: 1. Support base; 2. Limit column; 3. Vibration damping pad; 4. Connecting ring; 5. Vibration damping ring; 6. Connecting cover; 7. Base; 8. Reinforcement frame; 9. Motor. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] Please also read Figures 1 to 3 , the box fan vibration reduction device provided by the present invention is now described. The box fan vibration reduction device includes: a vibration reduction pad 3, a base 7, a plurality of limit columns 2 and a vibration reduction assembly. The vibration reduction pad 3 is used to be positioned on the supporting base 1. The base 7 is arranged on the vibration reduction pad 3, and the base 7 is used to install the motor 9. The plurality of limit columns 2 are vertically arranged and slidably matched with the base 7, and the plurality of limit columns 2 are used to make the base 7 have the freedom to vibrate only in the vertical direction. The vibration reduction assembly rests on the bottom surface of the base 7, and the vibration reduction assembly cooperates with the vibration reduction pad 3 to balance the force of the motor 9 on the base 7 to reduce the vibration of the base 7.

[0026] The beneficial effect of the box fan vibration reduction device provided by the present invention is that: compared with the prior art, the vibration reduction pad 3 in the box fan vibration reduction device of the present invention is positioned on the supporting base 1, a base 7 is arranged on the vibration reduction pad 3, and the motor 9 is installed on the base 7. The multiple limit columns 2 are all arranged vertically, and by making the multiple limit columns 2 slide and cooperate with the base 7, the base 7 has only the degree of freedom to vibrate in the vertical direction when the motor 9 is running. In order to reduce vibration, the vibration reduction assembly rests on the bottom surface of the base 7, and the vibration reduction assembly cooperates with the vibration reduction pad 3 to balance the force of the motor 9 on the base 7. In the present application, the vibration direction of the base 7 is limited by the multiple limit columns 2, and finally the vibration degree of the base 7 is reduced by the vibration reduction assembly, thereby ensuring the stability of the base 7.

[0027] In some embodiments of the box fan vibration reduction device provided in this application, please refer to Figure 1 and Figure 3 , a reinforcement frame 8 is installed in the base 7. A coupling connected to the motor 9 in transmission needs to be installed on the base 7. Usually, the end of the coupling away from the motor 9 is a fan, and the fan itself has a large external size, which makes the motor 9 and the coupling installed on the top of the base 7. And due to the presence of the fan, a cavity is usually formed inside the base 7. Because if a base 7 with strong rigidity is used, although it can reduce vibration, the mass of the entire base 7 is large and the cost is high.

[0028] To solve this problem, a reinforcing frame 8 is fixed inside the base 7 in this application. The reinforcing frame 8 is welded by channel steels, that is, the reinforcing frame 8 is formed by splicing and welding multiple channel steels. To maximize the load-bearing capacity of the reinforcing frame 8, the outside of the reinforcing frame 8 is an outer support in the shape of an approximate trapezoid, and the outer support is welded by four channel steels. There is an inner support inside the outer support. The inner support is welded by multiple channel steels and is in a cross shape. The cooperation between the inner support and the outer support ultimately improves the rigidity of the base 7.

[0029] In some embodiments of the box-type fan vibration damping device provided in this application, please refer to Figure 3 , multiple limit posts 2 are parallel to each other and arranged circumferentially along the base 7. Since the motor 9 is directly installed on the base 7, when the motor 9 is running, the rotor inside the motor 9 rotates circumferentially, and the final result is to cause the base 7 to vibrate. In the prior art, in order to reduce the vibration of the base 7, a vibration damping pad 3 is installed under the base 7. The vibration damping pad 3 is usually made of rubber material, and it can only reduce the amplitude of the vibration of the base 7 to a certain extent, but it cannot effectively offset it.

[0030] To more effectively ensure the stability of the base 7, that is, to reduce the degree of vibration of the base 7, multiple limit posts 2 are installed circumferentially on the base 7. The bottom of the limit posts 2 can be directly fixed on the support foundation 1, and the support foundation 1 can be a concrete foundation. The top of the limit posts 2 extends vertically upward. The multiple limit posts 2 are parallel to each other, and at the same time, the multiple limit posts 2 are all in sliding fit with the base 7.

[0031] To avoid the situation that the base 7 cannot vibrate up and down smoothly due to the large friction between the base 7 and the limit posts 2, multiple sliding sleeves can be installed on the limit posts 2. The sliding sleeves correspond to the limit posts 2 one by one. The outer side of the sliding sleeve is fixed on the base 7, and at the same time, lubricating oil is coated on the sliding sleeve and the limit posts 2. The ultimate purpose is to make the base 7 slide the same distance on the multiple limit posts 2.

[0032] In some embodiments of the box-type fan vibration damping device provided in this application, the base 7 is bonded to the vibration damping pad 3. In order to generate a force on the base 7 through hydraulic oil, it is necessary to prevent the hydraulic oil from overflowing from the cavity. To achieve the above effect, the base 7 can be directly bonded to the vibration damping pad 3, and at the same time, the bottom surface of the vibration damping pad 3 is also bonded to the support foundation 1. Through the above settings, it can be avoided that the vibration damping pad 3 is separated from the base 7. If the base 7 and the vibration damping pad 3 adopt a separated design, when the base 7 comes into contact with the vibration damping pad 3 again, due to the force of the vibration damping pad 3 on the base 7, the force on the base 7 changes suddenly. And the base 7 and the vibration damping pad 3 always maintain a fitting state. At this time, the state of the base 7, that is, the force of the vibration damping pad 3 on the base 7, can be calculated more simply, which is convenient for calculating the operating state of the power pump.

[0033] In some embodiments of the box-type fan vibration damping device provided in this application, please refer toFigure 1 and Figure 2 The vibration damping pad 3 is provided with a cavity inside, and the cavity is filled with hydraulic oil. The vibration damping component includes a power pump, and the power pump is communicated with the cavity and changes the hydraulic pressure of the hydraulic oil to generate a force on the base 7.

[0034] Due to the limitation of multiple limit posts 2, the base 7 can only vibrate in the vertical direction. In order to reduce the amplitude of vibration of the base 7, an upward force needs to be applied to the base 7 through the vibration damping component. Ideally, the force exerted by the vibration damping component on the base 7 and the force exerted by the vibration damping pad 3 on the base 7 completely offset the force exerted by the motor 9 on the base 7 and the gravity of the component itself.

[0035] To achieve the above effect, first, a cavity needs to be provided inside the vibration damping pad 3, and the power pump in the vibration damping component is communicated with the cavity. The hydraulic pressure of the hydraulic oil is changed by the power pump. Since the hydraulic oil in the cavity is in direct contact with the base 7, a certain force is exerted on the base 7 by changing the hydraulic pressure of the hydraulic oil, and this force is used to offset part of the force exerted by the motor 9 on the base 7.

[0036] However, it should be particularly noted that when the base 7 moves upward, the hydraulic pressure in the hydraulic oil will decrease. At this time, the power pump needs to increase the rising speed of the hydraulic pressure of the hydraulic oil. In actual application, the appropriate frequency and power of the power pump are found through the operating speed of the motor 9 and multiple tests.

[0037] In some embodiments of the box fan vibration damping device provided in the present application, please refer to Figure 1 and Figure 2 A connecting ring 4 is fixed to the bottom of the base 7. A connecting cover 6 is slidably arranged on the connecting ring 4. A cavity is formed between the connecting ring 4 and the inner cavity of the connecting cover 6, and hydraulic oil is filled in the connecting ring 4 and the connecting cover 6.

[0038] Since the vibration damping pad 3 is made of a flexible material, if a cavity is directly opened in the vibration damping pad 3, when the hydraulic pressure of the hydraulic oil is relatively large, the vibration damping pad 3 near the cavity will deform. Since the vibration damping pad 3 may produce plastic deformation under the action of the power pump, more importantly, it is difficult to effectively adjust the operating condition of the power pump due to the presence of the vibration damping pad 3.

[0039] Based on the above considerations, first, a connecting ring 4 is fixed to the bottom of the base 7. The connecting ring 4 can be directly welded to the bottom surface of the base 7. At the same time, the connecting ring 4 and the connecting cover 6 are hermetically matched, and hydraulic oil is filled in the connecting ring 4 and the connecting cover 6. When the power pump inputs hydraulic oil into the connecting cover 6, the hydraulic pressure in the hydraulic oil will increase, prompting the hydraulic oil to push the base 7 upward. Since both the connecting ring 4 and the connecting cover 6 are made of rigid materials, the magnitude of the force exerted on the base 7 can be determined more accurately by the power pump.

[0040] In some embodiments of the box body fan vibration damping device provided in the present application, please refer to Figure 1 and Figure 2 , the inner diameter of the top of the connecting cover 6 is greater than the inner diameter of the bottom. The base 7 itself has a certain mass. In the present application, a reinforcing frame 8 is installed in the base 7 and itself has a certain mass. At the same time, with the high-speed operation of the motor 9, the motor 9 will also have a certain impact force on the base 7, and a fan is also provided on one side of the base 7. Because in order to ensure that the vibration damping component can have sufficient acting force on the base 7, it is necessary to reasonably select the specification of the power pump, that is, it is necessary to ensure that the power pump can have sufficient acting force on the base 7 through hydraulic oil.

[0041] To achieve the above effects, the inner diameter of the connecting cover 6 near the top of the base 7 is greater than the inner diameter away from the bottom of the base 7. Since the contact area between the hydraulic oil and the base 7 at the top of the connecting cover 6 is larger, the acting force on the base 7 is also larger. By repeatedly changing the oil pressure in the hydraulic oil by the power pump, finally, under the action of the power pump and the motor 9, the stability of the base 7 is ensured.

[0042] In some embodiments of the box body fan vibration damping device provided in the present application, please refer to Figure 1 and Figure 2 , the connecting ring 4 is hermetically sleeved on the outside of the connecting cover 6, and a limiting ring is provided on the inner wall of the bottom of the connecting ring 4. The limiting ring extends towards the connecting cover 6 to prevent the connecting cover 6 from slipping off. The connecting ring 4 is in sliding fit with the connecting cover 6. In order to prevent the hydraulic oil from overflowing from the connecting ring 4 due to the slipping off of the connecting ring 4 and the connecting cover 6, a limiting ring is provided on the inner wall of the connecting ring 4. The limiting ring is integrally formed with the connecting ring 4, and the limiting ring extends from the inner wall of the connecting ring 4 towards the center of the connecting ring 4. A sealing ring is fixed on the top of the connecting cover 6, and the sealing ring is in sliding fit with the connecting ring 4, that is, the inner wall of the connecting ring 4 and the outer wall of the sealing ring are both vertically distributed arc surfaces, and the sealing ring is also integrally formed with the connecting cover 6.

[0043] The inner cavity of the connecting cover 6 decreases downward. Since the limiting ring extends below the top of the sealing ring, and the inner diameter of the limiting ring is smaller than the outer diameter of the top of the sealing ring, the sealing ring is prevented from slipping off from the connecting ring 4, and finally it is ensured that the hydraulic oil can always be filled in the connecting ring 4, the sealing ring and the connecting cover 6.

[0044] In some embodiments of the box body fan vibration damping device provided in the present application, please refer to Figure 1 and Figure 2 , the limiting ring is integrally formed with the connecting ring 4. Through the integral forming setting, the connection strength is ensured.

[0045] In some embodiments of the box body fan vibration damping device provided in the present application, please refer to Figure 1, a damping ring 5 is arranged between the bottom of the base 7 and the connecting cover 6. The position of the connecting cover 6 is relatively fixed, while the connecting ring 4 will move following the vibration of the base 7. The gravity of the motor 9, the coupling and the base 7, as well as the impact force of the motor 9 on the base 7 will all act on the base 7. If only hydraulic oil is used to balance the above-mentioned acting forces, many requirements will be put forward for the power and specifications of the power pump. Eventually, the energy consumed by the power pump is relatively large, and the cost of maintaining the stability of the base 7 is relatively high.

[0046] To solve the above problems, in this application, a damping ring 5 is arranged between the base 7 and the connecting cover 6. The damping ring 5 is made of flexible material. On the one hand, when the base 7 moves downward, since the position of the connecting cover 6 does not change, at this time the damping ring 5 is compressed and thus has a force on the base 7. By setting the damping ring 5, the oil pressure of the required hydraulic oil is reduced.

[0047] Another important aspect is that since the damping ring 5 is arranged between the base 7 and the connecting cover 6, the top surface and the bottom surface of the damping ring 5 are respectively adhered to the top surfaces of the base 7 and the connecting cover 6, thus ensuring the tightness between the base 7 and the connecting cover 6 through the damping ring 5 and avoiding the overflow of hydraulic oil.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Box fan vibration damping device, characterized in that, Comprising: A vibration damping pad for positioning on a support foundation; A base provided on the vibration damping pad, on which a motor is to be installed; A plurality of limiting columns, all vertically arranged and slidably engaged with the base, and the plurality of limiting columns cooperate to enable the base to have only the degree of freedom of vibration in the vertical direction; A vibration damping component, the vibration damping component abuts against the bottom surface of the base, and the vibration damping component cooperates with the vibration damping pad to balance the acting force of the motor on the base for reducing the vibration of the base; A cavity is provided in the vibration damping pad, and the cavity is filled with hydraulic oil. The vibration damping component includes a power pump, and the power pump communicates with the cavity and changes the hydraulic pressure of the hydraulic oil to generate an acting force on the base; A connecting ring is fixed to the bottom of the base, and a connecting cover is slidably provided on the connecting ring. The inner cavity of the connecting ring and the connecting cover forms the cavity, and the hydraulic oil is filled in the connecting ring and the connecting cover; The connecting ring is hermetically sleeved on the outside of the connecting cover, and a limiting ring is provided on the inner wall of the bottom of the connecting ring, and the limiting ring extends towards the connecting cover to prevent the connecting cover from slipping off; A vibration damping ring is provided between the bottom of the base and the connecting cover.

2. The box fan vibration damping device according to claim 1, characterized in that, A reinforcing frame is installed in the base.

3. The box fan vibration damping device according to claim 1, characterized in that, The plurality of limiting columns are parallel to each other and arranged along the circumference of the base.

4. The box fan vibration damping device according to claim 1, characterized in that, The base is bonded to the vibration damping pad.

5. The box fan vibration damping device according to claim 1, characterized in that, The inner diameter of the top of the connecting cover is larger than the inner diameter of the bottom.

6. The box fan vibration damping device according to claim 1, characterized in that, The limiting ring and the connecting ring are integrally formed.

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