Ultra-high damping rubber bearing and preparation method thereof

Abstract

An ultra-high damping rubber bearing, wherein the bearing rubber sheet is a composite rubber sheet composed of an intermediate rubber layer and an overlay layer. The composite rubber sheet is either Composite Rubber Sheet I or Composite Rubber Sheet II: Composite Rubber Sheet I comprises rubber A in the intermediate rubber layer, rubber B in the overlay layer, or M layers of rubber B and rubber A interlaced with each other; Composite Rubber Sheet II comprises rubber B in the intermediate rubber layer, and N layers of rubber A and rubber B interlaced with each other. Rubber A is a high-energy damping rubber, and rubber B is a high-elasticity rubber, with the high-elasticity rubber accounting for 5% to 90% of the total volume of the rubber sheet. The preparation method comprises preparing rubber A and rubber B blanks, preparing the bearing rubber sheet, and fabricating the bearing. The bearing is simple to manufacture and has adjustable performance. The prepared high-energy damping rubber material has a more uniform compound, higher tensile strength and elongation at break, and its performance is not significantly affected by temperature. After the external load is removed, the outer surface of the bearing is less susceptible to bulging or deformation, and has a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration-isolating bearings for bridges and buildings and preparation methods thereof, and in particular to an ultra-high damping rubber bearing and a preparation method thereof. Background Art

[0002] Lead-core seismic isolation rubber bearings, horizontally dispersed rubber bearings, and ultra-high damping rubber bearings (including high-damping rubber bearings) are commonly used products related to seismic isolation technology. Among these product types, horizontally dispersed bearings (non-lead-core seismic isolation rubber bearings) are not suitable for use in high-seismic areas due to their poor energy dissipation capacity; lead-core seismic isolation rubber bearings have strong energy dissipation capacity, but the use of heavy metal lead poses a potential environmental pollution risk; ultra-high damping rubber bearings (including high-damping rubber bearings) are favored by the market and widely used in engineering projects because they take into account both damping performance and environmental protection. However, existing ultra-high damping rubber bearings have the following defects:

[0003] 1. The support is made of simple high energy damping rubber and steel plate laminated by vulcanization (see attached Figure 1 and attached Figure 2 ), the ultra-high damping rubber bearing produced by this traditional method has large rubber damping and is not easy to recover from deformation. After the bearing is tested, even if the external load is removed, the outer surface will still produce bulging or deformation that cannot (easily) be recovered (see Appendix Figure 3 );

[0004] 2. In engineering, the performance of ultra-high damping rubber bearings (horizontal equivalent stiffness, horizontal equivalent damping ratio, etc.) often needs to be changed according to actual conditions. To achieve this change in bearing performance, the only way to achieve this change is to adjust the rubber formula used to make the bearings. However, due to the complexity of the high-energy damping rubber formula, adjustment is not only very difficult, but even if adjustments are made, it is difficult to meet performance requirements.

[0005] 3. Because the formula of high-energy damping rubber requires the addition of certain filler materials (such as resins), these materials make the high-energy damping rubber extremely temperature-sensitive. This makes the performance of (super) high-damping rubber bearings made from this type of rubber significantly affected by temperature changes, thus greatly limiting the areas where the bearings can be used. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an ultra-high damping rubber bearing which is not easy to bulge or deform, is simple to manufacture, and has a wide range of applications, and a preparation method thereof, so as to overcome the shortcomings of the above-mentioned prior art.

[0007] The technical solution to the above problems is:

[0008] An ultra-high damping rubber bearing comprises a rubber bearing body formed by alternately laminating and vulcanizing an inner connecting steel plate, a rubber sheet and a stiffening steel plate. The rubber sheet is a composite rubber sheet consisting of an intermediate rubber layer and a rubber layer covering the outer periphery of the intermediate rubber layer.

[0009] The composite rubber sheet is either composite rubber sheet I or composite rubber sheet II;

[0010] The composite rubber sheet I is: 1) wherein the middle rubber layer is rubber A and the covering layer is rubber B; 2) or the middle rubber layer is rubber A and the covering layer is M layers of rubber B and rubber A wrapped from the inside out, where the value of M is 3 or 5;

[0011] The composite rubber sheet II is: wherein the middle rubber layer is rubber B, and the rubber layer is N layers of rubber A and rubber B wrapped from the inside to the outside, and the value of N is 2, 4 or 6;

[0012] The rubber A is a high energy dissipation damping rubber, and the rubber B is a high elastic rubber;

[0013] The volume of the high elastic rubber accounts for 5% to 90% of the total volume of the rubber sheet.

[0014] A further technical solution is: the high energy dissipation damping rubber comprises the following components in parts by weight:

[0015] 30~60 parts of natural rubber, 20~40 parts of chloroprene rubber, 10~30 parts of nitrile rubber, 15~40 parts of chlorobutyl rubber, damping

[0016] 2-40 parts of reinforcing material, 10-100 parts of filler, 4-12 parts of antioxidant, 5-50 parts of softener, 5-15 parts of vulcanizing accelerator, 0.5-3 parts of vulcanizing agent;

[0017] The high elasticity rubber comprises the following components in parts by weight:

[0018] 30-90 parts of natural rubber, 10-70 parts of chloroprene rubber, 10-80 parts of filler, 5-15 parts of antioxidant, 5-50 parts of softener, 6-16 parts of vulcanizing accelerator, and 0.5-2.5 parts of vulcanizing agent.

[0019] Furthermore: the damping enhancement material is phenolic resin or other damping enhancement materials;

[0020] The antioxidant is one or more combinations of antioxidant RD, antioxidant D, antioxidant 4010, antioxidant 4010NA, antioxidant AW and protective wax;

[0021] The filler is one or more combinations of silica, carbon black and white carbon black;

[0022] The softener is one or more combinations of aromatic hydrocarbon oil, naphthenic oil, paraffin oil, and machine oil;

[0023] The vulcanization aid includes a rubber vulcanization accelerator and a vulcanization activator, wherein the rubber vulcanization accelerator is one or more of CBS, M, DM, and TMTD, and the vulcanization activator is a combination of zinc oxide and stearic acid;

[0024] The vulcanizing agent is sulfur.

[0025] Another technical solution is: a method for preparing an ultra-high damping rubber bearing, comprising the following steps:

[0026] S1 Preparation of high energy dissipation damping rubber blank film

[0027] S11 Preparation of masterbatch:

[0028] S111 is prepared according to the following weight parts:

[0029] 30-60 parts of natural rubber, 20-40 parts of chloroprene rubber, 10-30 parts of nitrile rubber, 15-40 parts of chlorinated butyl rubber, 2-40 parts of damping reinforcement material, 10-100 parts of filler, 4-12 parts of antioxidant;

[0030] S112 Put the above materials into the internal mixer for plasticization, slowly increase the pressure of the top bolt of the internal mixer, and stir for 1 to 20 minutes.

[0031] Remove the glue, cool and place for more than 1 hour for later use;

[0032] S12 Preparation of rubber compound:

[0033] S121: 120-220 parts of the cooled masterbatch are added to an internal mixer, and the upper bolt pressure of the internal mixer is slowly increased, and the mixer is stirred for 1-20 minutes;

[0034] S122: Add 5-90 parts of filler, 5-50 parts of softener, and 5-15 parts of vulcanizing accelerator into the internal mixer, maintain the top bolt pressure on the internal mixer, and stir for 1-10 minutes;

[0035] S123: Add 0.5-3 parts of vulcanizing agent to the internal mixer, maintain the pressure of the upper plug of the internal mixer, stir for 1-5 minutes, raise the plug for 5-15 seconds, so that the rubber material in the entire mixing chamber is alternately turned upside down for further thorough mixing, then lower the upper plug, maintain the pressure of the upper plug and stir for 1-5 minutes, then discharge the rubber, and transfer the rubber material from the discharge port to the open mixer, swinging the rubber material left and right 1-6 times;

[0036] S124 pulls the mixed rubber from the rollers of the mixing mill to form a continuous long sheet, cools and dries it, and then cuts the dried long sheet into sheets of the same size to obtain high-energy damping rubber blank sheets, which are then stacked and stored for future use.

[0037] S2 Preparation of high elastic rubber blank film

[0038] S21 plasticized rubber:

[0039] S211 Prepare the following materials by weight: 30-90 parts of natural rubber, 10-70 parts of chloroprene rubber;

[0040] S212: Put the above prepared materials into the internal mixer for plastication, slowly increase the pressure of the top bolt of the internal mixer, stir for 1 to 20 minutes, cool and place for more than 1 hour after debinding;

[0041] S22 Preparation of rubber compound:

[0042] S221: Put 100 parts of plasticized raw rubber into an internal mixer, slowly increase the pressure on the top bolt of the internal mixer, and stir for 1 to 5 minutes;

[0043] S222: Add 10-80 parts of filler, 5-15 parts of antioxidant, 5-50 parts of softener, and 6-16 parts of vulcanizing accelerator into the internal mixer, maintain the top bolt pressure on the internal mixer, and stir for 2-10 minutes;

[0044] S223: Add 0.5-2.5 parts of vulcanizing agent to the internal mixer, maintain the pressure of the upper plug of the internal mixer, stir for 1-6 minutes, raise the plug for 5-15 seconds, so that the rubber material in the entire mixing chamber is alternately turned upside down for further thorough mixing, then lower the upper plug, maintain the pressure of the upper plug and stir for 1-4 minutes before discharging the rubber, and transfer the rubber material from the discharge port to the open mixer and swing the rubber material left and right 1-6 times;

[0045] S224 sheet pulling, cooling, drying, and cutting: The mixed rubber is pulled out from the rollers of the mixing mill into a continuous long sheet, cooled and dried, and then the dried long sheet is cut into sheets of the same size to obtain high-elasticity rubber blank sheets, which are stacked and stored for future use;

[0046] S3 Preparation of support rubber sheet

[0047] S31 blank film processing:

[0048] The high energy dissipation damping rubber blank film and the high elasticity rubber blank film prepared in steps S1 and S2 are respectively put into a film discharging machine for processing;

[0049] S311 Thin pass: First adjust the roller distance to a small value, and then feed the high energy damping rubber or high elastic rubber blank into the roller for 2~3 thin passes.

[0050] Second, let the rubber material pass through the gap between the two rollers to become a thin layer, reducing the Mooney viscosity of the rubber material;

[0051] S312 Refining: Adjust the roller distance to refining rubber, tap the rubber left and right, tap the rubber from one side of the roller to pull out a certain length of rubber, and cast

[0052] Put it between the rollers and mix it with the rubber compound piled on top. Repeat the operation 3 to 4 times to make the rubber compound more uniform.

[0053] S313 film output: According to the film thickness requirements, adjust the film machine roller distance to produce high energy dissipation damping rubber film or high elastic

[0054] rubber film;

[0055] S32 makes the middle rubber layer and rubber strip:

[0056] S321 is used to make the middle rubber layer. According to the size requirements of the support drawing, the high energy dissipation damping rubber obtained by the above process is cut with a cutter.

[0057] The rubber film or high elastic rubber film is cut into a circle or square to obtain a high energy dissipation damping rubber middle rubber layer or a high elastic rubber

[0058] The middle layer of glue is reserved;

[0059] S322 makes the rubber strip, uses a cutter to cut the high energy dissipation damping rubber film or high elastic rubber glue made by the above process

[0060] Cut the sheet into strips;

[0061] S33 prepares a support rubber sheet;

[0062] S331 Preparation of composite rubber sheet Ⅰ:

[0063] S3311 According to the bearing drawing size requirements: the high elastic rubber strip is covered on the high energy dissipation damping rubber middle rubber layer

[0064] peripheral;

[0065] S3312 uses a cutter to press the head and tail of the rubber strip to make it bonded and closed, and at the same time presses the middle rubber layer and the covering rubber strip, using rubber

[0066] The adhesiveness makes the butted parts bonded together to obtain a circular or square composite rubber sheet with only one rubber layer Ⅰ;

[0067] S3313 When the number of rubber layers M is 3 or 5, according to the size requirements of the bearing drawing, first wrap the high elastic rubber strip around the outer periphery of the high energy dissipation damping rubber middle rubber layer and repeat step S3312 to obtain the first rubber layer, and then wrap the high energy dissipation damping rubber

[0068] The rubber strip is coated on the periphery of the first rubber layer and step S3312 is repeated to obtain the second rubber layer, and the coating is repeated alternately until

[0069] A composite rubber sheet I having a rubber coating number M of 3 or 5 is obtained;

[0070] S332 Preparation of composite rubber sheet II:

[0071] S3321 According to the bearing drawing size requirements: the high energy dissipation damping rubber strip is wrapped on the high elastic rubber middle layer

[0072] peripheral;

[0073] S3322 uses a cutter to press the head and tail of the rubber strip to make it bonded and closed, and at the same time presses the middle rubber layer and the covering rubber strip, using rubber

[0074] The adhesiveness makes the butted parts bonded together to produce the first layer of rubber coating;

[0075] S3323 then wraps the high elastic rubber strip around the high energy dissipation damping rubber, and repeats step S3322 to obtain the second layer.

[0076] The rubber layer is coated to obtain a circular or square composite rubber sheet having only two rubber layers.

[0077] S3324: When the number of rubber coating layers N is 4 or 6, repeat steps S3321 to S3323 until a composite rubber sheet II having 4 or 6 rubber coating layers N is obtained;

[0078] S4 production support

[0079] S41 steel plate treatment: steel plate shot blasting, leveling, cleaning in a cleaning machine, drying, and then applying adhesive;

[0080] S42 vulcanization: adopt compression molding high temperature vulcanization method, first put the lower inner connecting steel plate into the mold, then step

[0081] The support rubber sheet prepared in step S33 and the stiffening steel plate processed in step S41 are stacked and placed in a staggered manner according to the drawings and requirements.

[0082] Place the inner connecting steel plate, control the vulcanization temperature, vulcanization time and vulcanization pressure, and obtain high damping rubber bearing or super

[0083] High damping rubber bearings.

[0084] Further: The main technical parameters of the internal mixer are: the main engine speed is 10 to 40 rpm, the upper bolt pressure is

[0085] 0.1~1MPa, the circulating cooling water pressure is 0.1~1MPa; the “slowly increasing the pressure of the top bolt on the internal mixer” means increasing the pressure of the top bolt on the internal mixer to 1MPa.

[0086] Furthermore: in the debinding process of steps S112, S123, S212 and S223, the temperature of the internal mixer is controlled during debinding.

[0087] At 100-125°C; in step S42, the vulcanization temperature is 110-150°C, the vulcanization pressure is 2-20 MPa, the vulcanization time is determined according to the thickness of the support, the support thickness is 30-500 mm, and the vulcanization time is 1-24 hours.

[0088] Due to the adoption of the above technical solution, the ultra-high damping rubber bearing and the preparation method thereof of the present invention have the following beneficial effects:

[0089] 1. The rubber sheet of the present invention is a composite rubber sheet consisting of an intermediate rubber layer and a rubber cover layer covering the outer periphery of the intermediate rubber layer.

[0090] The volume proportion of high elastic rubber is 5%~90%. By adjusting the volume proportion of high elastic rubber and the hardness of the rubber compound, ultra-high elasticity can be achieved.

[0091] The stiffness and equivalent damping ratio of high damping rubber bearings are controllable and adjustable: the horizontal equivalent damping ratio of the bearings can be adjusted from 6% to 30%.

[0092] The rubber modulus corresponding to the horizontal stiffness can be adjusted in the range of 0.35MPa~2MPa, which does not require constant adjustment like the existing technology.

[0093] Rubber formulas are often difficult to meet performance requirements. Therefore, the present invention has the advantages of simple production, wide range of adjustment, and wide application range;

[0094] 2. The rubber sheet of the present invention is a composite rubber sheet consisting of an intermediate rubber layer and a rubber cover layer covering the outer periphery of the intermediate rubber layer;

[0095] The composite rubber sheet is either composite rubber sheet I or composite rubber sheet II. The composition of composite rubber sheet I is as follows: 1) the intermediate rubber layer is rubber A and the covering layer is rubber B; 2) the intermediate rubber layer is rubber A and the covering layer is M layers of rubber B and rubber A wrapped in an alternating pattern from the inside out, with the value of M being 3 or 5. The composition of composite rubber sheet II is as follows: the intermediate rubber layer is rubber B and the covering layer is N layers of rubber A and rubber B wrapped in an alternating pattern from the inside out, with the value of N being 2, 4 or 6. It can be seen that no matter whether the value of M is 3 or 5 and the value of N is 2, 4 or 6, the covering layer is rubber B—high-elastic rubber. Since high-elastic rubber materials have the characteristic of easy recovery from deformation, after the bearing is tested and the external load is removed, the outer surface of the bearing body will not bulge or deform.

[0096] 3. Traditional method of preparing high energy dissipation damping rubber materials: direct one-step mixing without using masterbatch; or

[0097] When preparing masterbatch, softener is added in the early stage, and raw materials with high melting point and difficult to disperse are added in the later stage of mixing.

[0098] The prepared rubber compound has poor uniformity, low tensile strength and elongation at break;

[0099] The preparation method of the present invention simultaneously feeds raw rubber, a portion of fillers, a high-melting-point damping reinforcement material, and an antioxidant into an internal mixer during the preparation of a high-energy-dissipation damping rubber masterbatch. During the mixing and stirring process, the shear force of the rubber system is increased, heat is generated quickly, the high-melting-point material is more easily melted, and the dispersion of the raw materials is improved. Compared with high-energy-dissipation damping rubber materials prepared by traditional methods, the rubber material is more uniform, and has higher tensile strength and elongation at break. Therefore, the rubber sheet and rubber support body formed therefrom have better tensile strength and fracture resistance.

[0100] 4. Since the damping reinforcement material in the high energy dissipation damping rubber is very sensitive to temperature, the performance of the rubber bearing is affected.

[0101] Temperature changes have a great impact, which limits the use of rubber bearings. One of the structures of this application is the rubber coating of high

[0102] Elastic rubber, high elastic rubber does not contain damping reinforcement materials, and the performance of ultra-high damping rubber bearings is not greatly affected by temperature, making

[0103] Its scope of application is wider;

[0104] 5. The ultra-high damping rubber bearing and its preparation method provided by the present invention are also applicable to high damping rubber bearings.

[0105] The following is a super high damping rubber bearing and its preparation method of the present invention in conjunction with the drawings and embodiments.

[0106] The technical features of the method are further explained. BRIEF DESCRIPTION OF THE DRAWINGS

[0107] Figure 1 This is the main view (cross-section) of a traditional rubber bearing;

[0108] Figure 2 This is a top view of the rubber sheet of a traditional rubber bearing;

[0109] Figure 3 This is a schematic diagram of the bulging deformation of a traditional rubber bearing after the external load is removed;

[0110] Figure 4 This is a front view (cross-sectional view) of an ultra-high damping rubber bearing of the present invention;

[0111] Figure 5 1 is a top view of the rubber sheet described in Example 1 (composite rubber sheet I, the intermediate rubber is rubber A, and there is only one rubber B covering layer);

[0112] Figure 62. FIG. 1 is a top view of the rubber sheet described in Example 2 (composite rubber sheet I, the intermediate rubber is rubber A, N is equal to 3, i.e., there are three layers of rubber B covering);

[0113] In the figure: 1 - upper inner connecting steel plate, 2 - stiffening steel plate, 3 - rubber sheet, 31 - high energy dissipation damping rubber (rubber A), 32 - high elasticity rubber (rubber B), 4 - lower inner connecting steel plate, 5 - rubber sheet of the original technology, 51 - drum beat. DETAILED DESCRIPTION

[0114] Example 1:

[0115] An ultra-high damping rubber bearing, comprising an inner connecting steel plate (including an upper inner connecting steel plate 1 and a lower inner connecting steel plate

[0116] 4) The rubber support body is made of rubber sheets and stiffening steel plates alternately laminated and vulcanized. The rubber sheet is composed of an intermediate rubber layer and a wrapping

[0117] A composite rubber sheet consisting of a rubber layer covering the outer periphery of the intermediate rubber layer; the composite rubber sheet is a composite rubber sheet I, wherein the intermediate rubber

[0118] The rubber layer is rubber A - high energy dissipation and damping rubber, and its rubber layer is rubber B - high elastic rubber (see attached Figure 5 The composite rubber sheet I has only one rubber coating layer, and the volume of the high elastic rubber accounts for 5% to 90% of the total volume of the rubber sheet;

[0119] The rubber A is a high energy dissipation damping rubber, and its composition by weight is:

[0120] 30~60 parts of natural rubber, 20~40 parts of chloroprene rubber, 10~30 parts of nitrile rubber, 15~40 parts of chlorobutyl rubber, damping

[0121] 2-40 parts of reinforcing material, 10-100 parts of filler, 4-12 parts of antioxidant, 5-50 parts of softener, 5-15 parts of vulcanizing accelerator, 0.5-3 parts of vulcanizing agent;

[0122] The rubber B is a high elastic rubber, and its composition by weight is:

[0123] 30-90 parts of natural rubber, 10-70 parts of chloroprene rubber, 10-80 parts of filler, 5-15 parts of antioxidant, 5-50 parts of softener, 6-16 parts of vulcanizing accelerator, and 0.5-2.5 parts of vulcanizing agent.

[0124] The damping enhancement material is phenolic resin or other damping enhancement materials;

[0125] The antioxidant is one or more combinations of antioxidant RD, antioxidant D, antioxidant 4010, antioxidant 4010NA, antioxidant AW and protective wax;

[0126] The filler is one or more combinations of silica, carbon black and white carbon black;

[0127] The softener is one or more combinations of aromatic hydrocarbon oil, naphthenic oil, paraffin oil, and machine oil;

[0128] The vulcanization accelerator includes a rubber vulcanization accelerator and a vulcanization activator. The rubber vulcanization accelerator is CBS, M, DM,

[0129] One or more of TMTD, the vulcanization activator is a combination of zinc oxide and stearic acid;

[0130] The vulcanizing agent is sulfur.

[0131] Example 2:

[0132] An ultra-high damping rubber bearing, which is composed of rubber A - high energy dissipation damping rubber and rubber B - high elastic rubber

[0133] The structure is basically the same as that of the first embodiment, including the inner connecting steel plate, rubber sheet and stiffening steel plate alternately.

[0134] The rubber support body is made of laminated vulcanized rubber sheet, which is composed of an intermediate rubber layer and a rubber layer covering the outer periphery of the intermediate rubber layer.

[0135] The composite rubber sheet is a composite rubber sheet I, except that the middle rubber layer is rubber A, and the rubber layer is three layers (i.e., M=3) of rubber B and rubber A wrapped from the inside to the outside, in the following order: the first rubber layer is rubber B, the second rubber layer is rubber A, and the third rubber layer is rubber B (see attached Figure 6 );

[0136] The rubber A is a high energy dissipation damping rubber, and the rubber B is a high elastic rubber;

[0137] The volume of the high elastic rubber accounts for 5% to 90% of the total volume of the rubber sheet;

[0138] As a variation of the above embodiment:

[0139] (1) The number of layers M of the rubber layer can also be 5;

[0140] (2) The composite rubber sheet may also be a composite rubber sheet II, wherein the intermediate rubber is rubber B and the rubber layer is N layers of rubber A and rubber B wrapped from the inside out. The value of N is 2, 4 or 6. The values of M and N can be determined according to the requirements of the rubber bearing. The structure of the composite rubber sheet with different values is as follows:

[0141] (1) Structure of composite rubber sheet I:

[0142] When M is 3, the middle rubber is rubber A, and the three rubber layers surrounding rubber A are: the first layer is rubber B, the second layer is rubber A, and the third layer is rubber B;

[0143] When M is 5, the middle rubber is rubber A, and the five rubber layers surrounding rubber A are: the first layer is rubber B, the second layer is rubber A, the third layer is rubber B, the fourth layer is rubber A, and the fifth layer is rubber B.

[0144] (2) Structure of composite rubber sheet II:

[0145] When N is 2, the middle rubber layer is rubber B, and the two rubber layers surrounding rubber B are: the first layer is rubber A, and the second layer is rubber B;

[0146] When N is 4, the middle rubber is rubber B, and the four rubber layers surrounding rubber B are: the first layer is rubber A, the second layer is rubber B, the third layer is rubber A, and the fourth layer is rubber B;

[0147] When N is 6, the middle rubber is rubber B, and the six layers of rubber surrounding rubber B are: the first layer is rubber A, the second layer is rubber B, the third layer is rubber A, the fourth layer is rubber B, the fifth layer is rubber A, and the sixth layer is rubber B.

[0148] Example 3

[0149] A method for preparing an ultra-high damping rubber bearing comprises the following steps:

[0150] S1 Preparation of high energy dissipation damping rubber blank film

[0151] S11 Preparation of masterbatch:

[0152] S111 is prepared according to the following weight parts:

[0153] 30~60 parts of natural rubber, 20~40 parts of chloroprene rubber, 10~30 parts of nitrile rubber, 15~40 parts of chlorobutyl rubber, damping

[0154] 2~40 parts of reinforcing material, 10~100 parts of filler, 4~12 parts of antioxidant;

[0155] S112 Put the above materials into the internal mixer for plasticization, slowly increase the pressure of the top bolt of the internal mixer, and stir for 1 to 20 minutes.

[0156] Remove the glue, cool and place for more than 1 hour for later use;

[0157] S12 Preparation of rubber compound:

[0158] S121: 120-220 parts of the cooled masterbatch are added to an internal mixer, and the upper bolt pressure of the internal mixer is slowly increased, and the mixer is stirred for 1-20 minutes;

[0159] S122: Add 5-90 parts of filler, 5-50 parts of softener, and 5-15 parts of vulcanizing accelerator into the internal mixer, maintain the top bolt pressure on the internal mixer, and stir for 1-10 minutes;

[0160] S123: Add 0.5-3 parts of vulcanizing agent to the internal mixer, maintain the pressure of the upper plug of the internal mixer, stir for 1-5 minutes, raise the plug for 5-15 seconds, so that the rubber material in the entire mixing chamber is alternately turned upside down for further thorough mixing, then lower the upper plug, maintain the pressure of the upper plug and stir for 1-5 minutes, then discharge the rubber, and transfer the rubber material from the discharge port to the open mixer, swinging the rubber material left and right 1-6 times;

[0161] S124 pulls the mixed rubber from the rollers of the mixing mill to form a continuous long sheet, cools and dries it, and then cuts the dried long sheet into sheets of the same size to obtain high-energy damping rubber blank sheets, which are then stacked and stored for future use.

[0162] S2 Preparation of high elastic rubber blank film

[0163] S21 plasticized rubber:

[0164] S211 Prepare the following materials by weight: 30-90 parts of natural rubber, 10-70 parts of chloroprene rubber;

[0165] S212: Put the above prepared materials into the internal mixer for plastication, slowly increase the pressure of the top bolt of the internal mixer, stir for 1 to 20 minutes, cool and place for more than 1 hour after debinding;

[0166] S22 Preparation of rubber compound:

[0167] S221: Put 100 parts of plasticized raw rubber into an internal mixer, slowly increase the pressure on the top bolt of the internal mixer, and stir for 1 to 5 minutes;

[0168] S222: Add 10-80 parts of filler, 5-15 parts of antioxidant, 5-50 parts of softener, and 6-16 parts of vulcanizing accelerator into the internal mixer, maintain the top bolt pressure on the internal mixer, and stir for 2-10 minutes;

[0169] S223: Add 0.5-2.5 parts of vulcanizing agent to the internal mixer, maintain the pressure of the upper plug of the internal mixer, stir for 1-6 minutes, raise the plug for 5-15 seconds, so that the rubber material in the entire mixing chamber is alternately turned upside down for further thorough mixing, then lower the upper plug, maintain the pressure of the upper plug and stir for 1-4 minutes before discharging the rubber, and transfer the rubber material from the discharge port to the open mixer and swing the rubber material left and right 1-6 times;

[0170] S224 sheet pulling, cooling, drying, and cutting: The mixed rubber is pulled out from the rollers of the mixing mill into a continuous long sheet, cooled and dried, and then the dried long sheet is cut into sheets of the same size to obtain high-elasticity rubber blank sheets, which are stacked and stored for future use;

[0171] S3 Preparation of support rubber sheet

[0172] S31 blank film processing:

[0173] The high energy dissipation damping rubber blank film and the high elasticity rubber blank film prepared in steps S1 and S2 are respectively put into a film discharging machine for processing;

[0174] S311 Thin pass: First adjust the roller distance to a small value, and then feed the high energy damping rubber or high elastic rubber blank into the roller for 2~3 thin passes.

[0175] Second, let the rubber material pass through the gap between the two rollers to become a thin layer, reducing the Mooney viscosity of the rubber material;

[0176] S312 Refining: Adjust the roller distance to refining rubber, tap the rubber left and right, tap the rubber from one side of the roller to pull out a certain length of rubber, and cast

[0177] Put it between the rollers and mix it with the rubber compound piled on top. Repeat the operation 3 to 4 times to make the rubber compound more uniform.

[0178] S313 film output: According to the film thickness requirements, adjust the film machine roller distance to produce high energy dissipation damping rubber film or high elastic

[0179] rubber film;

[0180] S32 makes the middle rubber layer and rubber strip:

[0181] S321 is used to make the middle rubber layer. According to the size requirements of the support drawing, the high energy dissipation damping rubber obtained by the above process is cut with a cutter.

[0182] The rubber film or high elastic rubber film is cut into a circle or square to obtain a high energy dissipation damping rubber middle rubber layer or a high elastic rubber

[0183] The middle layer of glue is reserved;

[0184] S322 makes the rubber strip, uses a cutter to cut the high energy dissipation damping rubber film or high elastic rubber glue made by the above process

[0185] Cut the sheet into strips;

[0186] S33 prepares a support rubber sheet;

[0187] S331 Preparation of composite rubber sheet Ⅰ:

[0188] S3311 According to the bearing drawing size requirements: the high elastic rubber strip is covered on the high energy dissipation damping rubber middle rubber layer

[0189] peripheral;

[0190] S3312 uses a cutter to press the head and tail of the rubber strip to make it bonded and closed, and at the same time presses the middle rubber layer and the covering rubber strip, using rubber

[0191] The adhesiveness makes the butted parts bonded together to obtain a circular or square composite rubber sheet with only one rubber layer Ⅰ;

[0192] S3313 When the number of rubber layers M is 3 or 5, according to the size requirements of the bearing drawing, first wrap the high elastic rubber strip around the outer periphery of the high energy dissipation damping rubber middle rubber layer and repeat step S3312 to obtain the first rubber layer, and then wrap the high energy dissipation damping rubber

[0193] The rubber strip is coated on the periphery of the first rubber layer and step S3312 is repeated to obtain the second rubber layer, and the coating is repeated alternately until

[0194] A composite rubber sheet I having a rubber coating number M of 3 or 5 is obtained;

[0195] S332 Preparation of composite rubber sheet II:

[0196] S3321 According to the bearing drawing size requirements: the high energy dissipation damping rubber strip is wrapped on the high elastic rubber middle layer

[0197] peripheral;

[0198] S3322 uses a cutter to press the head and tail of the rubber strip to make it bonded and closed, and at the same time presses the middle rubber layer and the covering rubber strip, using rubber

[0199] The adhesiveness makes the butted parts bonded together to produce the first layer of rubber coating;

[0200] S3323 then wraps the high elastic rubber strip around the high energy dissipation damping rubber, and repeats step S3322 to obtain the second layer.

[0201] The rubber layer is coated to obtain a circular or square composite rubber sheet having only two rubber layers.

[0202] S3324: When the number of rubber coating layers N is 4 or 6, repeat steps S3321 to S3323 until a composite rubber sheet II having 4 or 6 rubber coating layers N is obtained;

[0203] S4 production support

[0204] S41 steel plate treatment: steel plate shot blasting, leveling, cleaning in a cleaning machine, drying, and then applying adhesive;

[0205] S42 vulcanization: adopt compression molding high temperature vulcanization method, first put the lower inner connecting steel plate into the mold, then step

[0206] The support rubber sheet prepared in step S33 and the stiffening steel plate processed in step S41 are stacked and placed in a staggered manner according to the drawings and requirements.

[0207] Place the inner connecting steel plate, control the vulcanization temperature, vulcanization time and vulcanization pressure, and obtain high damping rubber bearing or super

[0208] High damping rubber bearings.

[0209] The main technical parameters of the internal mixer used in the above method are: main engine speed of 10~40 rpm, top bolt

[0210] The pressure is 0.1~1MPa, and the circulating cooling water pressure is 0.1~1MPa; the "slowly increasing the pressure of the top bolt on the internal mixer" means increasing the pressure of the top bolt on the internal mixer to 1MPa.

[0211] In the above method steps S112, S123, S212 and S223, the temperature of the internal mixer is controlled at 100-

[0212] 125oC; in step S42, the vulcanization temperature is 110~150oC, the vulcanization pressure is 2~20MPa, the vulcanization time is determined according to the thickness of the support, the support thickness is 30~500mm, and the vulcanization time is 1~24 hours.

[0213] Note 1: The term “encapsulation” as used herein refers to surrounding and connecting. For example, “encapsulation layer encapsulating the periphery of the intermediate rubber layer” means that the encapsulation layer is connected to the periphery of the intermediate rubber layer and surrounds the intermediate rubber layer (e.g. Figure 5 );

[0214] Note 2: The bolt lifting in steps S123 and S223 refers to lifting the top bolt of the internal mixer so that the rubber at the bottom of the mixing chamber can be lifted up with the rotation of the mixer.

[0215] The rotor rotates to the upper part of the mixing chamber, and the rubber material in the upper part of the mixing chamber is brought to the bottom of the mixing chamber through the rotor;

[0216] Note 3: The left and right rubber swing in steps S123 and S223 refers to the simultaneous movement of the rollers of the open mill and the rubber swing equipment installed above it.

[0217] During operation, the rubber swinging equipment rotates and circulates the rubber on the mixing mill continuously, and moves back and forth to ensure that the rubber at different positions is fully contacted and further mixed;

[0218] Note 4: The rubber vulcanization accelerator CBS is N-cyclohexyl-2-benzothiazole sulfenamide, M is 2-mercaptobenzothiazole, DM is dibenzothiazyl disulfide, and TMTD is tetramethylthiuram disulfide.

Claims

1. A method for preparing an ultra-high damping rubber bearing, characterized in that: The steps include: S1 Preparation of high energy dissipation damping rubber blank film S11 Preparation of masterbatch: S111 is prepared according to the following weight parts: 30~60 parts of natural rubber, 20~40 parts of chloroprene rubber, 10~30 parts of nitrile rubber, 15~40 parts of chlorobutyl rubber, damping 2~40 parts of reinforcing material, 10~100 parts of filler, 4~12 parts of antioxidant; S112 Put the above materials into the internal mixer for plasticization, slowly increase the pressure of the top bolt of the internal mixer, and stir for 1 to 20 minutes. Remove the glue, cool and place for more than 1 hour for later use; S12 Preparation of rubber compound: S121: put 120-220 parts of the cooled masterbatch into the internal mixer, slowly increase the pressure of the top bolt on the internal mixer, and stir. 1~20 minutes; S122 Add 5~90 parts of filler, 5~50 parts of softener, and 5~15 parts of vulcanizing agent into the internal mixer, and keep the top bolt on the internal mixer. Pressure, stirring for 1 to 10 minutes; S123 Add 0.5~3 parts of vulcanizing agent into the internal mixer, maintain the pressure of the top bolt on the internal mixer, stir for 1~5 minutes, and raise the bolt 5~15 Seconds, so that the rubber material in the entire mixing chamber is alternately turned up and down for further thorough mixing, and then the top bolt is lowered to maintain the pressure of the top bolt to stir After mixing for 1 to 5 minutes, discharge the rubber and transport it from the discharge port to the mixing mill, swinging the rubber left and right 1 to 6 times; S124 pulls the sheet, cools, dries, and cuts the sheet. The mixed rubber is pulled out of the mixing mill roller to form a continuous long sheet. After cooling and drying, the dried long film is cut into films of the same size to obtain high energy dissipation damping rubber blank films, which are stacked Store for later use; S2 Preparation of high elastic rubber blank film S21 plasticized rubber: S211 Prepare the following materials by weight: 30-90 parts of natural rubber, 10-70 parts of chloroprene rubber; S212 Put the above materials into the internal mixer for plastication, slowly increase the pressure of the top bolt of the internal mixer, stir for 1 to 20 minutes, and then discharge the glue. Let it cool for more than 1 hour before use; S22 Preparation of rubber compound: S221: Put 100 parts of plasticized raw rubber into an internal mixer, slowly increase the pressure on the top bolt of the internal mixer, and stir for 1 to 5 minutes; S222: Add 10-80 parts of filler, 5-15 parts of antioxidant, 5-50 parts of softener, and 6-16 parts of vulcanizing accelerator into the internal mixer, maintain the top bolt pressure on the internal mixer, and stir for 2-10 minutes; S223 Add 0.5~2.5 parts of vulcanizing agent to the internal mixer, maintain the pressure of the top bolt on the internal mixer, stir for 1~6 minutes, and raise the bolt 5~ 15 seconds, so that the rubber material in the entire mixing chamber is alternately turned up and down for further thorough mixing, and then the top bolt is lowered to maintain the pressure of the top bolt. After stirring for 1 to 4 minutes, discharge the glue and transport it from the discharge port to the mixing mill, swinging the glue left and right 1 to 6 times; S224 sheet pulling, cooling, drying, cutting: pull the mixed rubber from the roller of the mixing mill to form a continuous long sheet, cool Cool and dry the long film, then cut it into films of the same size to obtain high elastic rubber blank films, stack them and store them stand-by; S3 Preparation of support rubber sheet S31 blank film processing: The high energy dissipation damping rubber blank film and the high elasticity rubber blank film prepared in step S1 and S2 are respectively fed into the film discharging machine. work; S311 Thin pass: First adjust the roller distance to a small value, and then feed the high energy damping rubber or high elastic rubber blank into the roller for 2~3 thin passes. Second, let the rubber material pass through the gap between the two rollers to become a thin layer, reducing the Mooney viscosity of the rubber material; S312 Refining: Adjust the roller distance to refining rubber, tap the rubber left and right, tap the rubber from one side of the roller to pull out a certain length of rubber, and cast Put it between the rollers and mix it with the rubber compound piled on top. Repeat the operation 3 to 4 times to make the rubber compound more uniform. S313 film output: According to the film thickness requirements, adjust the film machine roller distance to produce high energy dissipation damping rubber film or high elastic rubber film; S32 makes the middle rubber layer and rubber strip: S321 is used to make the middle rubber layer. According to the size requirements of the support drawing, the high energy dissipation damping rubber obtained by the above process is cut with a cutter. The rubber film or high elastic rubber film is cut into a circle or square to obtain a high energy dissipation damping rubber middle rubber layer or a high elastic rubber The middle layer of glue is reserved; S322 makes the rubber strip, uses a cutter to cut the high energy dissipation damping rubber film or high elasticity rubber film made by the above process Cut into strips; S33 prepares a support rubber sheet; S331 Preparation of composite rubber sheet Ⅰ: S3311 According to the bearing drawing size requirements: the high elastic rubber strip is covered on the high energy dissipation damping rubber middle rubber layer peripheral; S3312 uses a cutter to press the head and tail of the rubber strip to make it bonded and closed, and at the same time presses the middle rubber layer and the covering rubber strip, using rubber The adhesiveness makes the butted parts bonded together to obtain a circular or square composite rubber sheet with only one rubber layer Ⅰ; S3313 When the number of rubber layers M is 3 or 5, first wrap the high elastic rubber strip on the high Repeat step S3312 to obtain the first rubber layer, and then add the high energy damping rubber The rubber strip is coated on the periphery of the first rubber layer and step S3312 is repeated to obtain the second rubber layer, and the coating is repeated alternately until A composite rubber sheet I having a rubber coating number M of 3 or 5 is obtained; S332 Preparation of composite rubber sheet II: S3321 According to the bearing drawing size requirements: the high energy dissipation damping rubber strip is wrapped on the high elastic rubber middle layer peripheral; S3322 uses a cutter to press the head and tail of the rubber strip to make it bonded and closed, and at the same time presses the middle rubber layer and the covering rubber strip, using rubber The adhesiveness makes the butted parts bonded together to produce the first layer of rubber coating; S3323 then wraps the high elastic rubber strip around the high energy dissipation damping rubber, and repeats step S3322 to obtain the second layer. The rubber layer is coated to obtain a circular or square composite rubber sheet having only two rubber layers. S3324 When the number of rubber layers N is 4 or 6, repeat steps S3321 to S3323 until the number of rubber layers N is 4 or 6. Layer of composite rubber sheet II; S4 production support S41 steel plate treatment: steel plate shot blasting, leveling, cleaning in a cleaning machine, drying, and then applying adhesive; S42 vulcanization: adopt compression molding high temperature vulcanization method, first put the lower inner connecting steel plate into the mold, then step The support rubber sheet prepared in step S33 and the stiffening steel plate processed in step S41 are stacked and placed in a staggered manner according to the drawings and requirements. Place the inner connecting steel plate, control the vulcanization temperature, vulcanization time and vulcanization pressure, and obtain high damping rubber bearing or super High damping rubber bearings.

2. The method for preparing an ultra-high damping rubber bearing according to claim 1, characterized in that: The main technical parameters of the internal mixer are: main engine speed of 10~40 rpm, upper ejector pressure of 0.1~1MPa, circulation The cooling water pressure is 0.1~1MPa; the "slowly increase the pressure of the top bolt on the internal mixer" means to increase the pressure of the top bolt on the internal mixer to 1MPa.

3. The method for preparing an ultra-high damping rubber bearing according to claim 2, characterized in that: During the binder removal in steps S112, S123, S212 and S223, the temperature of the internal mixer is controlled at 100-125°C; In step S42, the vulcanization temperature is 110-150°C, the vulcanization pressure is 2-20 MPa, and the vulcanization time is Determined according to the thickness of the support, the vulcanization time is 1 to 24 hours when the support thickness is 30 to 500 mm.

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