KR20030088231A - Cylindrical composite vibration isolating device having characteristics of metal-spring, viscoelastic and air-spring vibration isolating materials - Google Patents

Abstract

PURPOSE: A complex cylindrical damping apparatus having a metal spring damping material, a viscoelastic damping material and an air spring damping material is provided to improve damping efficiency by offsetting demerits of damping materials, and to cut down expenses by improving endurance. CONSTITUTION: A complex damping apparatus comprises a base plate(2) combined with a fixing structure; a cylinder(4) integrally formed in the base plate; and a damper assembly contained in the cylinder. The damper assembly has an upper layer(10) including a connecting piece(12) and an upper viscoelastic member(11) surrounding the connecting piece, an intermediate layer(20) having an intermediate viscoelastic member(21) combined with the lower part of the upper layer to restrict a buffer cooling chamber(25) for containing cooling air or liquid and a coil spring(22) inserted to the intermediate viscoelastic member, and a lower layer(30) having a lower viscoelastic member(31). The damper assembly is compressed and expanded in the cylinder in receiving load or vibration.

Description

CYLINDRICAL COMPOSITE VIBRATION ISOLATING DEVICE HAVING CHARACTERISTICS OF METAL-SPRING, VISCOELASTIC AND AIR-SPRING VIBRATION ISOLATING MATERIALS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical compound dustproof device having the characteristics of a metal spring dustproof material, a viscoelastic dustproof material, and an air spring dustproof material, and in particular, a metal is formed by coupling a coil spring and a viscoelastic member to each other organically in a cylinder. The present invention relates to a cylindrical compound dustproof device designed to exhibit the characteristics of a spring dustproof material, a viscoelastic dustproof material, and an air spring dustproof material.

In general, in order to increase the dustproof efficiency, the dustproof materials and structures used have high resistance to compressive loads, tensile loads, and lateral loads, and have excellent vibration damping performance over various frequency ranges of low, medium, and high frequencies, and are excellent in heat resistance and durability. And it is necessary to be a physical property and structure which is excellent in insulation and economical.

However, to date, no dustproof material or structure having such physical properties and structures has been provided and depending on the dustproof material used, it has advantages and disadvantages as described below.

That is, the currently used dustproof material may be divided into a metal spring dustproof material using a coil spring, etc., a viscoelastic dustproof material using a rubber, and an air spring dustproof material using air.

Representative examples of the metal spring dustproof material of the above-described dustproof material may be a coil spring dustproof material using elasticity of a coil spring having a displacement amount of 25 mm, 50 mm, 75 mm, and 100 mm. In the case of the coil spring dustproof material, it is widely used because of the advantages of low frequency dustproofing and low price, but it has a disadvantage of requiring additional load in order to obtain stable low frequency vibration damping performance. That is, in order to increase the mass, there is a disadvantage in that it is necessary to increase the static weight of the excitation source, which is a source of generating vibration or load.

In addition, another example of the metal spring dustproof material is a displacement connector of 25 mm to 100 mm, and is a flexible connector (eg, a pump) installed between a source (eg, a pump) and a facility (eg, a pipe) that is a source of vibration or load. In the case of the flexible connector, the connector is easily broken by the stretching movement caused by the vibration from the excitation source, and there is no resistance to tension or lateral force, so it is easily detached and causes malfunction. In addition, there is no vibration attenuation performance for the medium and high frequencies generated in the excitation source and a resonance phenomenon is caused.

In addition, the rubber dustproof material, which is a representative example of the viscoelastic dustproof material, has a great advantage in resistance to compressive load, tensile load, and lateral load, but the displacement amount is 0-7 mm, which is very small compared to the coil spring displacement amount, but the natural frequency is usually 4 Hz or more. Therefore, the low frequency dust-proof efficiency has a disadvantage that greatly falls than the metal spring dustproof material.

The advantages and disadvantages of the aforementioned metal spring dustproof material and the viscoelastic dustproof material and the air spring dustproof material which are not discussed in detail herein are summarized in Table 1 below.

division Advantages Disadvantages Metal spring dustproof material` -High resistance to temperature, corrosion and dissolution-High resistance to warping and elongation-Maximum displacement is allowed-Excellent for low frequency vibration Almost no attenuation, resonance occurs, short circuit occurs during medium and high frequency oscillation, rocking and surging problems, no lateral and tensile resistance. Viscoelastic dustproof agent -Free choice of shape-Excellent resistance to compression, tension and lateral force-Excellent for vibration vibration of medium and high frequency-Low displacement-Low price -Generally, oil and heat resistance is weak.-Oxidized by heat in air.-Low frequency vibration damping performance. Air Spring Dustproof Material -Wide range of spring constant setting-Constant natural frequency according to load change-Wide load capability-Automatic control is possible -Complex structure and high facility cost-Need additional facilities such as compressors-There is risk of air leakage-High price

As described above, since the dustproof materials provided so far have advantages and disadvantages for each material, designers have a limitation in selecting a dustproof material that must bear the disadvantages caused by selecting any of the dustproof materials. There has always been some limitation in increasing the dust-proofing efficiency because it has been necessary to design the dust-proof structure or device with the highest priority among the various vibration or load factors generated from.

In addition, due to the advantages and disadvantages of the above-described dustproof material, each dustproof material can maximize the dustproofing efficiency in some specific fields, but if it is applied in other fields, it may cause adverse reactions and thus cannot be easily applied to various fields. There was a problem.

In addition, in the case where the rubber dustproof material is used, for example, in the above-described dustproof material, the rubber dustproof material may have an excellent effect on the medium and high frequency dustproof, but the durability is easily reduced as a result of the particularly weak disadvantage of heat, which shortens the average life of the dustproof material. There was, and as a result there was a problem of high cost.

Therefore, the present invention was devised to solve the above-mentioned problems, while the advantages of the existing general dustproof materials are maintained while the disadvantages are offset by the advantages of the individual dustproof materials to maximize the dustproof efficiency. In addition, the main purpose is to provide a cylindrical compound dustproof device that can be applied to a variety of applications compared to the field of the general dustproof material, which can bring the life and cost reduction effect.

1 is an overall perspective view showing a schematic appearance of a cylindrical compound dustproof device according to the present invention.

FIG. 2 is a longitudinal sectional view taken along the line A-A of FIG. 1, showing the internal structure of the cylindrical compound dustproof device according to the first embodiment of the present invention; FIG.

3 is a longitudinal sectional view taken along the line A-A of FIG. 1, showing an elliptical steel spring inserted in the inner center of the intermediate elastic elastic member; FIG.

4 is a longitudinal sectional view taken along the line A-A of FIG. 1, showing a structure in which the fallopian steel spring is inserted in the inner center of the intermediate heavy elastic member;

Fig. 5 is a partial sectional view showing an action state in which the dustproof assembly contracts or expands in a cylinder upon application of vibration or load from the excitation source;

Figure 6 is a longitudinal sectional view showing the internal structure of the cylindrical compound dustproof device according to the second embodiment of the present invention.

※ Explanation of codes for main parts of drawing

1: composite dustproof device 2: base plate

4: cylinder 5: dustproof assembly

8: central space 10: upper layer

11: upper viscoelastic member 12: connecting piece

13: female thread part 15: heat dissipation port

20: intermediate layer 21: intermediate viscoelastic member

22 coil spring 23 viscoelastic roller

25: buffer cooling chamber 30: upper layer

31 lower viscoelastic member 32

33: viscoelastic roller 34: buffer cooling chamber

The present invention, in order to solve the above technical problem, includes a base plate fastened to the fixed structure, a cylinder integrally formed on the base plate, and a dustproof assembly accommodated in the cylinder,

The anti-vibration assembly includes an upper layer including a connecting piece connected to a vibration source and an upper viscoelastic member surrounding the outer peripheral portion of the connecting piece;

An intermediate layer composed of an intermediate viscoelastic member coupled to a bottom of the upper layer and defining a buffer cooling chamber in which an outer peripheral surface of the buffer cooling air or liquid can be accommodated, and a coil spring inserted into an inner center of the intermediate viscoelastic member;

Consisting of an underlayer with a lower viscoelastic member,

The dustproof assembly is characterized in that it is capable of compressing or expanding movement in a cylinder upon application of a load or vibration from the excitation source.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall perspective view showing a schematic appearance of a cylindrical compound dustproof device 1 according to the present invention. As shown in FIG. 1, the cylindrical compound dustproof device 1 according to the present invention includes a hollow cylinder 4 for accommodating a dustproof assembly 5 to be described later, and a bottom of the hollow cylinder 4. A disk having a flange portion 3 formed integrally with the center portion, the center portion of which is indented toward the inside of the hollow cylinder 4, and having a diameter slightly larger than that of the hollow cylinder 4; And a base plate 2.

The flange portion 3 of the base plate 2 is formed with a plurality of fixing bolt through holes 6 arranged at equal intervals in the circumferential direction, and are not shown through the fixing bolt through holes 6. By passing through the bolt and fixed to the structure can be fixed to the cylindrical compound dust-proof device 1 according to the present invention.

FIG. 2 is a longitudinal sectional view taken along the line A-A of FIG. 1, showing the internal structure of one embodiment of the cylindrical compound dustproof device 1 according to the present invention. As shown in FIG. 2, according to the present invention, a dustproof assembly 5 composed of an upper layer 10, an intermediate layer 20, and a lower layer 30 is largely contained in the hollow cylinder 4.

Hereinafter, a detailed configuration of the dustproof assembly 5 will be described in detail with reference to FIG. 2.

First, the upper layer 10 of the dustproof assembly 5 is formed to surround the excitation facility connection piece 12 connected to an excitation source (not shown) that generates vibration or load, and a lower outer peripheral portion of the connection piece 12. Upper viscoelastic member 11.

Specifically, the connecting piece 12 has a form in which an upper portion thereof protrudes from the upper portion of the cylinder 4 at normal times. In addition, a female screw portion 13 penetrated in the vertical direction is formed in the center of the connecting piece 12, and the cylindrical composite dustproof device 1 according to the present invention is provided by fastening a bolt (not shown) or the like to the female screw portion 13. Can be connected to the aforementioned excitation circle. On the other hand, the excitation source may be an excitation facility (not shown), such as a pump and a compressor that is a source of generating vibration or load.

In addition, an annular protrusion 14 is formed on the bottom of the connecting piece 12. As a result, the projections 14 are fitted into the annular grooves formed on the upper surface of the intermediate viscoelastic member 21 to be described later, so that the connecting piece 12 can be engaged with the intermediate viscoelastic member 21. It can absorb high frequency vibration.

Preferably, the connecting piece 12 is formed at the bottom of the connecting piece 12 and the bottom of the cylinder 4, and at the center of the intermediate viscoelastic member 21, the dust isolation plate 32, and the lower viscoelastic member 21 to be described later. A heat dissipation port 15 may be formed in communication with the central space 8 defined by the through hole to discharge heat to be accumulated in the central space 8 to the outside of the cylinder 4.

Specifically, the upper viscoelastic member 11 has a form in which the inner circumference thereof surrounds the lower outer circumference of the connecting piece 12 and the outer circumference thereof is in contact with the upper and side surfaces of the inner surface of the cylinder 4.

Next, the intermediate layer 20 of the dustproof assembly 5 includes an intermediate viscoelastic member 21 in which a buffer cooling chamber 25 in which buffer cooling air or liquid can be accommodated is formed on the outer circumferential surface thereof, and the intermediate viscoelastic member 21. It includes a coil spring 22 inserted in the inner center of the).

Specifically, the intermediate viscoelastic member 21 has a hollow cylindrical body 24 having a through hole penetrating in the vertical direction to define a part of the central space 8 at the center thereof, and the hollow cylindrical body 24. And a plurality of annular viscoelastic rollers 23 formed integrally with the outer circumferential surface of the cylinder 4 and in sliding contact with the inner surface of the cylinder 4 and arranged at equal intervals in the vertical direction. By the above arrangement of the annular viscoelastic roller 23, an annular buffer cooling chamber 25 is formed between the roller and the roller that can exhibit characteristics as an air spring dustproof material by accommodating a buffer cooling gas or liquid.

In addition, the upper end portion of the intermediate viscoelastic member 21 has a form in which the outer peripheral surface thereof is in close contact with the inner surface of the cylinder 4, and the lower end portion of the intermediate viscoelastic member 21 has a lower viscoelastic member ( 31) in a sealed form.

Further, the coil spring 22 is inserted into the intermediate viscoelastic member 21 in such a manner that the longitudinal center line of the coil spring is oriented in the vertical direction, and a part of the coil spring 22 is intermediate viscoelastic member 21. A part is inserted into and fixed in a helical groove (not shown) formed in the inner circumferential surface of the through hole of the through hole, and the other part is disposed in such a manner as to be exposed to the central space 8.

Preferably, the coil spring 22 may include a straight steel spring of constant diameter in the longitudinal direction as shown in FIG. Alternatively, the coil spring 22 may be replaced with an elliptical steel spring as shown in FIG. 3, a fallopian steel spring as shown in FIG. 4. At this time, when the fallopian-type steel spring absorbs the vibrational energy and converts it into thermal energy, the fallopian tube type steel spring may absorb more vibrational energy than the linear steel spring and change the thermal energy into thermal energy.

Finally, the lower layer 30 of the dustproof assembly 5 includes a lower viscoelastic member 31 having a plurality of linear viscoelastic rollers 33 integrally formed on a bottom thereof, and a groove formed on an upper surface of the lower viscoelastic member 31. It includes a vibration isolation plate 32 which can be inserted and whose upper surface is in close contact with the bottom of the intermediate viscoelastic member 21.

Specifically, the lower viscoelastic member 31 has a through hole continuous with the through hole formed in the center of the body 24 of the intermediate viscoelastic member 21 so that the center thereof defines a part of the above-described central space 8. The outer circumferential surface thereof has a disk shape in which the outer peripheral surface is in close contact with the inner surface of the cylinder 4.

Preferably, the plurality of linear viscoelastic rollers 33 are arranged on the bottom of the lower viscoelastic member 31 in a straight line, spaced apart at predetermined intervals, and are in close contact with the bottom of the cylinder. By arranging the linear viscoelastic rollers 33, a linear buffer cooling chamber 34 is formed between the rollers and the rollers that can exhibit characteristics as an air spring dustproof material by accommodating a buffer cooling gas or liquid.

In addition, the dust isolation plate 32 is generally made of steel or a polymer material plate or a soft plate, and serves as a reflector reflecting vibrations transmitted through the intermediate layer 20 of the dustproof assembly 5, and at the center thereof. A through hole is formed so as to define a part of the above-described central space 8, and a through hole continuous with the through hole formed in the center of the body 24 of the intermediate viscoelastic member 21, and the outer circumferential surface thereof is the body of the intermediate viscoelastic member 21 ( It is in the form of a disc approximately matching the outer diameter of 24).

Preferably, the upper viscoelastic member 11 is composed of a member having a soft hardness, for example 35 ± 5 ° A, and the intermediate viscoelastic member 21 is harder than the hardness of the upper viscoelastic member 11. Hardness, for example 45 ± 5 ° A, wherein the lower viscoelastic member 31 is harder than the hardness of the body 22 of the intermediate viscoelastic member, for example 55 ± 5 ° A. By being composed of a member having a hardness, it can be designed to withstand various compressive loads from an excitation source.

Hereinafter, a cylindrical compound dustproof device 1 according to a second embodiment of the present invention will be described with reference to FIG. 6, where the cylindrical compound according to the first embodiment of the present invention described with reference to FIGS. 2 to 5. The same or similar reference numerals are given to the same or similar components as those of the vibration isolator 1, and the description thereof is omitted.

First, the cylindrical compound dustproof device 1 according to the second embodiment of the present invention is installed in a state in which it is suspended from a fixed structure to which vibration transmission is to be prevented. It is mainly used for such a purpose because it can exhibit excellent properties.

In addition, the configuration of the cylindrical compound dustproof device 1 according to the second embodiment of the present invention is as shown in Figure 6 of the cylindrical compound dustproof device 1 according to the first embodiment as follows. It is different from the configuration.

That is, first, the configuration of the cylindrical compound dustproof device 1 according to the second embodiment of the present invention is a cylinder 4 on the upper surface of the upper viscoelastic member 11 'of the upper layer 10' of the dustproof assembly 5. A plurality of linear viscoelastic rollers 33 'which are in sliding contact with the upper surface of the rollers and spaced at predetermined intervals in a straight line are integrally formed, and buffer cooling air or liquid can be accommodated between these rollers 33'. It differs from the cylindrical compound dustproof device of the first embodiment in that the buffer cooling chamber 34 'is limited.

Second, in the configuration of the cylindrical compound dustproof device 1 according to the second embodiment of the present invention, the vibration isolation plate 32 'can be inserted into a groove formed in the upper surface of the intermediate viscoelastic member 21, and the upper surface thereof is the upper viscoelastic member. It differs from the cylindrical compound dustproof device of the first embodiment in that it is in close contact with the bottom face of 11 '.

Third, in the configuration of the cylindrical compound dustproof device 1 according to the second embodiment of the present invention, the connecting piece 12 'connected to the excitation circle is surrounded by the lower viscoelastic member 31' of the lower layer 30 '. The connecting plate 12 'has a female thread portion 13' formed at the center thereof, and the female thread portion 13 'has a stud bolt 13 " protruding upward from the cylinder 4; ) Is different from the cylindrical compound dustproof device of the first embodiment in that it is configured to be coupled to the excitation source.

Hereinafter, the operation of the present invention configured as described above will be described.

First, when vibrations and loads are transmitted from the excitation source not shown to the facility connecting piece 12, the dustproof assembly 5 according to the present invention contracts or expands up and down within the cylinder 4 as shown in FIG. You will repeat the exercise.

In this process, according to the present invention, since the coil spring 22 excellent in low frequency vibration is inserted into the body 24 of the intermediate viscoelastic member 21, the characteristics of the coil spring dustproof material by the coil spring 22 are achieved. This can be exerted so that the low frequency attenuation action can be performed efficiently.

Further, according to the present invention, the viscoelastic members 11, 21, and 31 having excellent resistance to compressive load, tensile load, and lateral load and excellent in medium and high frequency vibration are provided in the upper layer 10 and the lower layer 20 in the cylinder 4. And the intermediate layers 30, respectively, the viscoelastic members 11, 21, and 31 exhibit the characteristics of the viscoelastic members, and absorb the various compressive loads, tensile loads and lateral loads, and attenuate the medium and high frequency. This can be done efficiently.

Further, according to the present invention, due to the configuration in which the annular buffer cooling chamber 25 is provided on the outer circumferential surface of the intermediate viscoelastic member 21, the characteristics of the air spring dustproof material are exhibited by the buffer cooling chamber 25, and the impact is exerted. A shock absorbing effect excellent in resistance to vibration or load can be performed.

In addition, according to the present invention, since the hardness of the upper viscoelastic member 11, the intermediate viscoelastic member 21 and the lower viscoelastic member 31 is configured to be divided into three stages and shaped, the cylinder according to the present invention The type dustproof apparatus 1 can withstand various compressive loads from an excitation circle by these viscoelastic members 12, 21, and 31. As shown in FIG.

On the other hand, the vibration energy transmitted to the dustproof assembly 5 is converted into exothermic energy by vibrating damping action, and the converted exothermic energy is transferred to the buffer cooling chamber 25 to buffer the cooling gas in the buffer cooling chamber 25. Or cooled by liquid or transferred to air in the central space 8 to be released to the outside of the cylinder 4 through the heat dissipation hole 15, thereby minimizing the influence of the exothermic energy on the viscoelastic member to improve the durability of the viscoelastic member. The residual vibration can be reflected by the vibration isolation plate 32 to the intermediate layer 20.

The present invention described above is not limited to the above-described embodiments and drawings, and various substitutions, conversions, and changes can be made without departing from the technical spirit of the present invention. It will be clear to those who have it.

Above, according to the cylindrical composite dustproof apparatus of the present invention of the above-described configuration, while the advantages of the current general dustproof material is maintained as it is, the disadvantages can be offset by the advantages of the individual dustproof material can maximize the dustproofing efficiency That can bring an effect.

In addition, the field of application of the current general dustproof material is limited to a specific field, but according to the present invention, it can be applied to various industrial fields, such as the field of construction machinery equipment, plant dustproof material, air conditioner dustproof material, and mechanical dustproof device. Can bring

In addition, the average lifespan of the current general dustproof material is 2-3 years, according to the present invention, the overall durability of the device is increased to be able to use for more than 10 years to extend the life of the effect of about 3 times more than the conventional general dustproof material life This can lead to significant cost savings.

Claims (13)

A base plate fastened to the fixed structure, a cylinder integrally formed on the base plate, and a dustproof assembly housed in the cylinder, The anti-vibration assembly includes an upper layer including a connecting piece connected to a vibration source and an upper viscoelastic member surrounding the outer peripheral portion of the connecting piece; An intermediate layer composed of an intermediate viscoelastic member coupled to a bottom of the upper layer and defining a buffer cooling chamber in which an outer peripheral surface of the buffer cooling air or liquid can be accommodated, and a coil spring inserted into an inner center of the intermediate viscoelastic member; Consisting of an underlayer with a lower viscoelastic member, And wherein the dustproof assembly is capable of compressing or expanding movement in the cylinder upon application of a load or vibration from the excitation source. The method of claim 1, And the buffer cooling chamber is formed integrally with the outer circumferential surface of the intermediate viscoelastic member and is defined by a plurality of annular viscoelastic rollers which are in sliding contact with the inner surface of the cylinder and are arranged at equal intervals in the vertical direction. The method of claim 1, The bottom of the lower viscoelastic member is formed with a plurality of linear viscoelastic rollers which are in sliding contact with the bottom of the cylinder and spaced at predetermined intervals in a straight line, and between these rollers is buffered cooling which can accommodate buffer cooling air or liquid Cylindrical composite dustproof device characterized in that the seal is limited. The method of claim 1, The intermediate layer and the lower layer is formed with a central space for transmitting heat generated by the vibration damping action of the coil spring, the connection piece is characterized in that the heat dissipation port for discharging the heat transferred in the central space to the outside of the cylinder is formed Cylindrical compound dustproof device. The method of claim 1, And further comprising a dustproof plate which can be inserted into a recess formed in the upper surface of the lower viscoelastic member and whose upper surface is to be in close contact with the bottom surface of the intermediate viscoelastic member, wherein the dustproof plate is made of steel or a polymer material or a soft plate and the dustproof assembly Cylindrical composite dustproof device, characterized in that it functions as a reflector reflecting the vibration transmitted through the intermediate layer of the. The method of claim 1, The coil spring is a cylindrical compound dustproof device, characterized in that the straight steel spring. The method of claim 1, The coil spring is a cylindrical compound dust-proof device, characterized in that the elliptical steel spring. The method of claim 1, The coil spring is a cylindrical compound dust-proof device, characterized in that the fallopian steel spring. A base plate fastened to the fixed structure, a cylinder integrally formed on the base plate, and a dustproof assembly housed in the cylinder, The dustproof assembly comprises an upper layer having an upper viscoelastic member, An intermediate layer consisting of an intermediate viscoelastic member defining a buffer cooling chamber capable of receiving buffer cooling air or liquid on its outer circumferential surface, and a coil spring inserted in the inner center of the intermediate viscoelastic member; It is coupled to the bottom of the intermediate layer, consisting of a lower layer consisting of a connecting piece connected to the excitation circle and a lower viscoelastic member surrounding the outer peripheral portion of the connecting piece, And wherein the dustproof assembly is capable of compressing or expanding movement in the cylinder upon application of a load or vibration from the excitation source. The method of claim 9, And the buffer cooling chamber is formed integrally with the outer circumferential surface of the intermediate viscoelastic member and is defined by a plurality of annular viscoelastic rollers which are in sliding contact with the inner surface of the cylinder and are arranged at equal intervals in the vertical direction. The method of claim 9, The upper surface of the upper viscoelastic member is formed with a plurality of linear viscoelastic rollers which are in sliding contact with the upper surface of the cylinder and spaced at predetermined intervals in a straight line form, and between these rollers is buffered cooling which can accommodate buffer cooling air or liquid Cylindrical composite dustproof device characterized in that the seal is limited. The method of claim 9, The connecting plate is formed in the center of the female thread, the female compound cylindrical dustproof device, characterized in that can be connected to the excitation circle is coupled to the stud bolt protruding to the upper cylinder. The method of claim 9, And a dustproof plate which can be inserted into a recess formed in the upper surface of the intermediate viscoelastic member and whose upper surface is to be in close contact with the bottom of the upper viscoelastic member.