KR100550079B1 - Damping device using india rubber and methode of manufacturing india rubber - Google Patents

Abstract

The vibration damping apparatus for ships using elastic rubber according to the present invention includes a center plate fixed to a support, an elastic rubber bonded to the center plate to absorb vibrations and shocks, and supporting machinery on top of the elastic rubber, A vibration damping device comprising a flange for transmitting an impact load to an elastic rubber and a flange sleeve inserted into an inner diameter of the elastic rubber and fastened to a machine together with the flange, wherein the elastic rubber is a filler based on 100 parts by weight of the chloroprene rubber substrate. 5 to 20 parts by weight, 5 to 15 parts by weight of plasticizer, 0 to 10 parts by weight of softener, 5 to 15 parts by weight of metal oxide, 0 to 3 parts by weight of fatty acid, 1 to 5 parts by weight of antioxidant, 0.50 to 5.00 weight of vulcanization accelerator To prepare a kneaded mixture containing the addition, the kneaded mixture is laminated on an adhesive-coated metal center plate at 100 ~ 160 ℃, 140 ~ 160 kg / cm ² 60 It is characterized by consisting of a configuration for compression molding for ~ 180 minutes.

The vibration damping device for ships using the elastic rubber of the present invention exhibits a low and constant natural frequency characteristic of 6.0 Hz to 9.0 Hz at a load range of 150 lb to 450 lb, and a natural frequency characteristic of 6.0 Hz to 7.5 Hz at a rated load of 450 lb. By showing the effect that can insulate the vibration noise impact of various marine machinery.

Description

Damping device using india rubber and methode of manufacturing india rubber

1 is a perspective view showing the structure of the vibration damper for ships using an elastic rubber according to the present invention.

Explanation of symbols on the main parts of the drawings

10: center plate 20: flange

30: flange sleeve 40: elastic rubber

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damper for ships, in particular, to reduce vibrations and noise generated in machinery mounted on a ship, and to protect the machinery from impact loads transmitted from external hulls. It is about.

In general, the vibration isolator is used as a support of the machinery to reduce the transmission of vibration and noise generated from the machinery to the outside while supporting the load of the machinery.

In order to reduce the vibration of the machinery and the transmission of noise and impact, the vibration damper must have a lower natural frequency lower than a certain ratio compared to the vibration frequency generated by the machinery.

However, if the stiffness of the vibration suppression apparatus is too small, the static displacement with respect to the machinery supporting load becomes large, which causes a problem of unstable when an external load is applied.

In addition, in order to use such a vibration damping device on a ship, it must have durability and environmental resistance that its characteristics do not change even if it is installed for a long time in the ship's environment. Must have

However, the elastic rubber used in general vibration damping devices cannot meet all of these requirements.

Therefore, it is necessary to develop a vibration damping device and an elastic rubber having a natural frequency that can sufficiently obtain the effect of reducing vibration, noise and impact while not having a large static displacement with respect to the machinery load.

An object of the present invention for solving the above problems is to be used as a support for marine machinery has a durable enough to withstand the load of machinery and has a low and constant natural frequency at that load, to protect small machinery from external impact load The purpose of the present invention is to propose a method for manufacturing a vibration damper for ships and an elastic rubber for vibration isolator using an elastic rubber having a shock absorbing performance.

Marine vibration damping apparatus using an elastic rubber according to the present invention for achieving the above object, the center plate is fixed to the support, the elastic rubber to be bonded to the center plate to absorb vibration and shock and machinery on top of the elastic rubber A vibration damper comprising: a flange for supporting and transmitting vibration and impact loads of machinery to an elastic rubber, and a flange sleeve inserted into an inner diameter of the elastic rubber and fastened to the machinery together with the flange.

The elastic rubber is 5 to 20 parts by weight of filler, 5 to 15 parts by weight of plasticizer, 0 to 10 parts by weight of softener, 5 to 15 parts by weight of metal oxide, 0 to 3 parts by weight of fatty acid, antioxidant based on 100 parts by weight of chloroprene rubber base 1 to 5 parts by weight, a kneading product containing 0.50 to 5.00 parts by weight of a vulcanization accelerator is prepared, and the kneaded material is laminated on an adhesive-coated metal center plate at 100 to 160 ° C. and 140 to 160 kg / cm ² It characterized by consisting of a configuration for compression molding for 60 to 180 minutes.

Elastic rubber manufacturing method for vibration damper according to the present invention for achieving the above object, (a) 20 to 30 parts by weight of chloroprene rubber having a normal crystallization rate and 80 to 70 parts by weight relatively slow crystallization rate of chloroprene rubber 5 to 20 parts by weight of filler, 5 to 15 parts by weight of plasticizer, 0 to 10 parts by weight of softener, 5 to 15 parts by weight of metal oxide, 0 to 3 parts by weight of fatty acid, antioxidants 1 to 5 per 100 parts by weight of a chloroprene rubber base Preparing a first kneaded mixture in which the mixture including parts by weight is sufficiently kneaded using a banbari mixer or kneader at a temperature range above the melting point of chloroprene rubber, that is, 50 to 80 ° C; (b) remixing the kneaded product in an open roll mill at 50 to 80 ° C., and adding 0.5 to 5.00 parts by weight of a vulcanization accelerator to disperse it to prepare a final kneaded product; (c) laminating the kneaded product on an adhesive-coated metal center plate and compressing the mixture to 100 to 160 ° C. and 140 to 160 kg / cm ² for 60 to 180 minutes to produce a molded article. It features.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a cutaway perspective view showing the structure of a marine vibration damper using an elastic rubber according to the present invention.

Marine vibration damping device using an elastic rubber according to the present invention as shown in the Figure is a center plate 10 is fixed to a support (not shown), and the elastic to adhere to the center plate 10 to absorb vibration and shock A flange 20 for supporting the machinery on the upper portion of the rubber 40 and the elastic rubber 40 and transmitting the vibration and impact load of the machinery to the elastic rubber, and inserted into the inner diameter of the elastic rubber 40, the flange It consists of a flange sleeve 30 which is fastened to the machinery together with the (20).

The left and right sides of the center plate 10 are fixed to the support by separate fastening members (for example, bolts).

The elastic rubber 40 is bonded to the upper and lower portions of the center plate 10 while the flange 20 is placed on the upper portion, the flange sleeve 30 coupled to the flange 20 is the inner diameter of the elastic rubber 40 Is fitted on.

The flange 20 mounts the machinery on the upper portion of the flange 20 to fix the machinery by using a bolt hole in communication with the flange sleeve 30.

At this time, the load and the up and down vibration of the machinery mounted on the upper portion is transmitted to the elastic rubber 40 to reduce the vibration and noise by the elastic rubber 40 to absorb the shock. In addition, when a large load or impact force is applied in the transverse direction and the upward direction, the flange sleeve 30 may hit the elastic rubber 40 to prevent the shock absorption and the occurrence of displacement above a certain limit.

In addition, the elastic rubber 40 is a filler 5 ~ 20 to 100 parts by weight of the chloroprene rubber substrate mixed with 0 to 30 parts by weight of chloroprene rubber having a normal crystallization rate and 70 to 100 parts by weight of relatively slow crystallization rate Weight parts, plasticizer 5 to 15 parts by weight, softener 0 to 10 parts by weight, metal oxides 5 to 15 parts by weight, fatty acids 0 to 3 parts by weight, antioxidants 1 to 5 parts by weight, vulcanization accelerators include 0.50 to 5.00 parts by weight The kneaded material is prepared, and the kneaded material is laminated on the center plate 10 to which the adhesive is applied, and then formed by compression molding at 100 to 160 ° C and 140 to 160 kg / cm 2 for 60 to 180 minutes.

The vibration damping apparatus of the present invention using the elastic rubber 40 manufactured as described above has a natural frequency of 6.0 Hz to 9.0 Hz when the load supports a mechanical load in the range of 150 lb to 450 lb.

In particular, the static displacement at the rated load of 450 lb is less than 1.12 cm, and the natural frequency is 7.0 Hz to 0.5 Hz.

Hereinafter, looking at each of the composition components for producing the elastic rubber 40 according to the present invention in more detail.

First, chloroprene rubber is generally characterized according to the rate difference and Mooney viscosity of crystallization, and the chloroprene rubber used as a substrate in the present invention is used by mixing the varieties with a low crystallization rate and the varieties with a low crystallization rate to suit the purpose. .

Fillers used for the purpose of imparting reinforcement to the base rubber generally use a lot of inorganic fillers such as carbon black and silica, and especially carbon black is used to give high modulus in elastic mounts that require dustproof properties. It is preferable. Carbon black, which is classified according to particle size and crosslinking rate difference according to the American standard, ASTM, is generally added in an amount of 5 to 50 parts by weight based on 100 parts by weight of the base in the manufacture of elastic mounts. In this case, 5 to 10 parts by weight of N330 and 5 to 20 parts by weight of N774 are used for 100 parts by weight of the base material.

The plasticizer used in the present invention is prepared by mixing 5 to 15 parts by weight of a phthalic acid ester-based plasticizer including dioctylphthalate to 100 parts by weight of a rubber substrate, depending on the use and required properties.

As a softener used in the present terminology, kneaded product is prepared by adding 0 to 9 parts by weight of pactis to 100 parts by weight of a vegetable oil softener.

Metal oxides improve the mechanical properties by reducing frictional resistance to the metal surface, which is the processing machine of the base rubber, and by activating the vulcanization accelerator to further promote the acceleration reaction.In general, cadmium oxide, zinc oxide, and magnesium oxide Mercury oxide, tin oxide, lead oxide, calcium oxide, etc. are used. In the present invention, 3.0 to 6.0 parts by weight of zinc oxide and 3.0 to 6.0 parts by weight of magnesium oxide are used based on 100 parts by weight of the substrate.

Fatty acid plays a role in improving crosslinking and processability in the present invention, it is preferable to use 0 to 3 parts by weight based on 100 parts by weight of the substrate. Fatty acids are generally used stearic acid.

Chloroprene rubbers are generally vulcanized by the action of metal oxides, and the vulcanization accelerators include thiourea base accelerators such as ethylene thiourea and diethyl thiourea, and thiuram super accelerators such as tetramethyl thiuram monosulfide and tetramethyl thiuram disulfide. Combination is common.

Octylated diphenylamine, phenylnaphthylamine, trimethyldihydroquinoline, dimethylbenzyl diphenylamine, etc. can be used as antioxidant.

Table 1

                                              [Unit: parts by weight]

division Example Usually crystalline chloroprene ¹⁾ 30 Slow crystalline chloroprene ²⁾ 70 Filler ³⁾ 15  Zinc oxide 5  Magnesium oxide 4  Stearic acid 0.5 Antioxidant ⁴⁾ 3 Plasticizer ⁵⁾ 7 Softener ⁶⁾ 5 Promoter 1 ⁷⁾ 1.0 Accelerators 2 ⁸⁾ 0.15  Note 1) Denka, Chloroprene M-40 2) Denka, Chloroprene DCR-36 3) Carbon Black Korea, Corax HAF 4) Uni Royal Chemical, NAUGAURD 5) Aekyung Emulsification, DOP 6) Ilsung Chemical, Black Saab 7) Linkwell EU 8) Dongyang Steel Chemical, Oricel-TT

Table 1 shows the composition of the elastic rubber according to the embodiment of the present invention. An embodiment of the present invention will be described with reference to the above table.

First, as shown in Table 1, based on 100 parts by weight of chloroprene rubber substrate mixed with 30 parts by weight of chloroprene rubber having a normal crystallization rate and 70 parts by weight of chloroprene rubber having a very slow crystallization rate, 15 parts by weight of N774, a phthalic ester system 7 parts by weight of plasticizer, 5 parts by weight of vegetable oil softener packis, 5 parts by weight of zinc oxide, 4 parts by weight of magnesium oxide, 0.5 parts by weight of stearic acid, 3 parts by weight of antioxidant to add about 10 to 30 in a kneader at 50 to 80 ℃ Knead about minutes.

The kneaded product is added to 3.50 parts by weight of a vulcanization accelerator in an open roll mill having a surface temperature of 50 to 80 ° C. to prepare a final kneaded product.

Then, the kneaded material is laminated on an SS41 metal center plate coated with an adhesive, and then compression molded at 100 to 160 ° C. and 140 to 160 kg / cm 2 for 60 to 180 minutes to produce an elastic rubber 40.

The elastic rubber 40 manufactured by the above process is adhesively laminated on the center plate 10 as shown in FIG. 1, and a flange sleeve 30 made of metal in a hole formed in the center of the elastic rubber 40. ), And the upper flange 20 of the metal material is coupled to the upper flange 20 by a bolt or the like to complete the marine vibration damping apparatus using the elastic rubber according to an embodiment of the present invention.

Hereinafter, the characteristic test of the elastic rubber and the damping device using the same as shown in the above embodiment will be described with reference to Table 2.

TABLE 2

division Property value Test Methods Elastic rubber Hardness A 47 Measurement using an Asker Type A durometer in accordance with KS M6518 importance 1.31 Average value measured five times using model DMA-3, Ueshima's automatic specific gravity measurement device according to KS M6519 Tensile Strength (kg / cm ² ) Before Thermal Aging After Thermal Aging  180 200 Measured using Zwick's universal testing machine according to KS M6518. The thermal aging test was conducted for 46 hours at 90 ° to change the physical properties before and after aging. Elongation (%) Before heat aging After heat aging  700 750 Compression Strain (%) 15 According to KS M6518, it was measured using a compressive strain measuring device, and the test was carried out at 90 ° for 46 hours. Low Temperature Compression Strain (%) One In accordance with KS M6518, it was measured using a compressive strain measuring device, and tested at -1 ?? for 94 hours. Volume change rate due to oil (%) 10 Soak in oil for 70 hours at 70 ?? Assembly Elastic Mount Static displacement at rated load 450 lb (cm) 0.95 Displacement measurement at 450 lb rated load using UTM in accordance with MIL-M-17508F Natural Frequency (Hz) 450 lb Supported 350lb Supported 250lb Supported 150lb Supported  6.9 7.0 6.9 7.8 In accordance with MIL-M-17508F, a sine sweep test of 0.02 inch on amplitude is performed using a shaking table with mass weights to support the corresponding weight, and the natural frequency is found by frequency analysis of the response signal. Drift Height Change (cm) Natural Frequency (Hz)  0.075 7.3 In accordance with MIL-M-17508F, a mass weight of 450 lb was applied for 4 days, followed by a sine sweep test of 0.02 inch on amplitude using a height change measurement and a shaking table. Finding natural frequencies by frequency analysis Fatigue durability No crack / damage Investigate cracks and breaks by adding a sinusoidal wave 500,000 cycles with a frequency of 7 Hz and a half amplitude of 0.05 inch with a rated load of 450 lb in accordance with MIL-M-17508F.

The natural frequency of Table 2 shows the results of testing the natural frequency in the state of applying a load of 150lb ~ 450lb to the elastic rubber 40 according to the present invention.

As shown in Table 2, the elastic rubber 40 of the present invention has a shock absorbency and at the same time supports a load of 450 lb of static load, the static displacement is less than 1.12 cm and the natural frequency is 7.0 Hz to 0.5 Hz, It can be seen that it has a natural frequency between 6.0 Hz and 9.0 Hz at a load of 150 lb ~ 450 lb, and has durability and oil resistance.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention.

Therefore, the technical scope to be protected of the present invention should not be limited to the contents mentioned in the detailed description of the invention, but should be defined by the claims.

The present invention has the following effects.

First, the ship vibration damping device using the elastic rubber of the present invention has the effect of supporting the machinery of various load ranges with a low and constant natural frequency.

Secondly, when the ship vibration damping device using the elastic rubber of the present invention is used for a ship, there is an effect having durability and seawater resistance and oil resistance that its characteristics do not change for a long time in the environment in the ship.

Claims (10)

A center plate fixed to a support, an elastic rubber bonded to the center plate to absorb vibrations and shocks, and a flange for supporting the machinery on top of the elastic rubber and transmitting vibration and impact loads of the machinery to the elastic rubber; In the vibration damping device comprising a flange sleeve which is inserted into the inner diameter of the elastic rubber and fastened to the machinery together with the flange, The elastic rubber is 5 to 20 parts by weight of filler, 5 to 15 parts by weight of plasticizer, 0 to 10 parts by weight of softener, 5 to 15 parts by weight of metal oxide, 0 to 3 parts by weight of fatty acid, antioxidant based on 100 parts by weight of chloroprene rubber base 1 to 5 parts by weight, a kneading product containing 0.50 to 5.00 parts by weight of a vulcanization accelerator is prepared, and the kneaded material is laminated on an adhesive-coated metal center plate at 100 to 160 ° C. and 140 to 160 kg / cm ² Ship vibration damping device using an elastic rubber, characterized in that consisting of 60 to 180 minutes compression molding. The method of claim 1, The chloroprene rubber is a vibration damping for ships using elastic rubber, characterized in that it uses a chloroprene rubber substrate mixed with 0 to 30 parts by weight of chloroprene rubber having a normal crystallization rate and 70 to 100 parts by weight of relatively slow crystallization rate Device. The method of claim 1, The filler is a vibration damper for ships using elastic rubber, characterized in that for using 10 ~ 30 parts by weight of N774 to give reinforcement and high modulus. The method of claim 1, Said plasticizer is 5 to 15 parts by weight of a phthalic acid ester plasticizer containing dioctyl phthalate, marine vibration damper using an elastic rubber. The method of claim 1, Said softener is a vibration damper for ships using elastic rubber, characterized in that 0 to 9 parts by weight of the pactis in the vegetable oil-based softener. The method of claim 1, Said metal oxide is 3.0 to 6.0 parts by weight of zinc oxide, 3.0 to 6.0 parts by weight of magnesium oxide, vibration suppression apparatus for ships using elastic rubber, characterized in that used. The method of claim 1, The vulcanization accelerator is 0.50 to 2.00 parts by weight of ethylene thiourea, 0.50 to 3.00 parts by weight of tetramethyl thiuram disulfide, marine vibration damping apparatus using an elastic rubber. The method of claim 1, The vibration damping device is a vibration damping device for ships using elastic rubber, characterized in that the natural frequency of 6.0Hz ~ 9.0Hz, when supporting the machinery of the load in the range of 150 lb ~ 450 lb. The method of claim 8, When the vibration isolator supports a load of rated load 450 lb, the static displacement is less than 1.12cm, the natural frequency is vibration damper for ships using elastic rubber, characterized in that 7.0Hz ~ 0.5Hz. (a) 20 to 30 parts by weight of chloroprene rubber having a normal crystallization rate and 80 to 70 parts by weight of chloroprene rubber having a relatively low crystallization rate, and 5 to 20 parts by weight of filler and plasticizer 5 to 15 parts by weight, 0 to 10 parts by weight of a softener, 5 to 15 parts by weight of metal oxides, 0 to 3 parts by weight of fatty acids, and 1 to 5 parts by weight of antioxidants are mixed in a temperature range above the melting point of chloroprene rubber, that is, 50 to 80 ° C. Preparing a sufficiently kneaded primary kneaded mixture using a short-barrier mixer or kneader in the process; (b) remixing the kneaded product in an open roll mill at 50 to 80 ° C., to which 0.5 to 5.00 parts by weight of vulcanization accelerator is added to disperse the kneaded product, thereby preparing a final kneaded product; (c) laminating the kneaded product on an adhesive-coated metal center plate and compressing the mixture to 100 to 160 ° C. and 140 to 160 kg / cm ² for 60 to 180 minutes to produce a molded article. Elastic rubber manufacturing method for vibration damper characterized in that.

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