Rubber compound for elastic support of wind driven generator and preparation method of rubber compound

Abstract

The invention relates to the field of rubber materials, in particular to a rubber compound for an elastic support of a wind driven generator and a preparation method of the rubber compound. The rubber compound for the elastic support of the wind driven generator at least comprises the following raw materials in parts by mass: 90-110 parts of a natural rubber composition, 3-6 parts of an activating agent, 2-4 parts of an anti-aging agent, 2-3.5 parts of an internal release agent, 1-2 parts of a lubricating agent, 30-45 parts of filler, 2-3 parts of a vulcanizing agent and 2-3 parts of an accelerant. The finally prepared rubber compound not only has excellent comprehensive properties such as temperature resistance, aging resistance and corrosion resistance, but also can completely abandon the addition of synthetic rubber, so that the environmental protection property is greatly improved, the problem of higher interfacial compatibility is avoided, the rubber compound is separated from a framework of petroleum-based synthetic rubber, and the service life of the rubber compound is prolonged. The anti-fatigue life and the use quality of the rubber compound material are improved.

Description

Technical Field

[0001] This application relates to the field of rubber materials, and more specifically to a rubber compound for elastic support of wind turbines and its preparation method. Background Technology

[0002] As a core component of clean energy, wind turbines' transmission systems are subjected to complex alternating loads and extreme environmental impacts over extended periods. Elastic support components, as key buffer elements in the transmission chain, have a decisive influence on overall vibration suppression, load transmission, and service life. Current mainstream technologies utilize rubber-based compounded rubber to prepare elastomer support components, leveraging the viscoelastic energy dissipation mechanism of polymer materials to reduce the risk of fatigue damage to the gearbox and main bearings.

[0003] In the existing technological system, synthetic rubber is widely used due to its highly tunable molecular structure and excellent weather resistance. This type of material is typically formulated with carbon black reinforcing systems, vulcanizing agents, and antioxidants to form a compound. After high-temperature compression molding, it forms an elastomer with specific stiffness and damping characteristics. Especially under the harsh conditions of high salt spray and high ultraviolet radiation in nearshore environments, synthetic rubber-based compounds exhibit excellent ozone aging resistance and chemical stability.

[0004] However, with increasingly stringent global environmental regulations and the growing demand for specialized applications, the limitations of synthetic rubber are becoming increasingly apparent. Firstly, its raw materials are highly dependent on the petrochemical industry chain, resulting in a high carbon footprint and significant consumption of non-renewable resources. Secondly, in extreme low-temperature environments, such as below -40°C, the glass transition temperature of some synthetic rubbers is easily triggered, exacerbating the risk of material embrittlement and failure. This problem is particularly critical in wind power applications where low-temperature cold start conditions are frequent. More importantly, certain wind farms are subject to hydrocarbon solvent vapor erosion; the insufficient solvent resistance of traditional synthetic rubber will cause swelling and deformation, directly affecting the dynamic stiffness accuracy of the support components. While natural rubber (NR) possesses excellent low-temperature elasticity and high mechanical strength and is a renewable resource, the unsaturated double bonds in its molecular chain are highly susceptible to ozone attack and degradation, making it difficult for conventional antioxidants to provide effective protection under long-term dynamic strain. Existing technologies attempt to improve weather resistance through blending or adding shielding agents such as nano-clay, but these solutions still cannot escape the framework of petroleum-based synthetic rubber, and significant interfacial compatibility issues can easily lead to a decrease in material fatigue life. Summary of the Invention

[0005] In summary, existing rubber compound technology for wind turbine elastic supports faces a triple contradiction: an imbalance between environmental friendliness and material performance, a conflict between ensuring toughness at extreme low temperatures and long-term aging resistance, and the need for specific chemical resistance. Therefore, there is an urgent need to develop a novel rubber compound system based on sustainable raw materials, free of synthetic rubber, and possessing wide-temperature-range high elasticity, long-term aging resistance, and resistance to specific media, in order to overcome the current technological bottlenecks in the high-quality development of the wind power industry. Through continuous research in this technical field, the applicant has finally proposed a rubber compound specifically for wind turbine elastic supports and its preparation method in this application. The rubber compound ultimately obtained by this application not only possesses excellent comprehensive properties such as temperature resistance, aging resistance, and corrosion resistance, but also completely eliminates the addition of synthetic rubber, thereby significantly improving environmental friendliness while avoiding greater interfacial compatibility issues, breaking away from the framework of petroleum-based synthetic rubber, and improving the fatigue life and service quality of the compound material.

[0006] A rubber compound for elastic support of wind turbine generator, comprising, by weight, at least the following raw materials: 90-110 parts of natural rubber, 3-6 parts of activator, 2-4 parts of antioxidant, 2-3.5 parts of internal release agent, 1-2 parts of lubricant, 30-45 parts of filler, 2-3 parts of vulcanizing agent, and 2-3 parts of accelerator.

[0007] In a preferred embodiment, the natural rubber composition is a combination of natural rubber SMR 3L, natural rubber STR 5L, and natural rubber SIR 20.

[0008] In a preferred embodiment, the mass ratio of the natural rubber SMR 3L, natural rubber STR 5L, and natural rubber SIR 20 is (5-7):(2-4):(1-2); the optional mass ratio schemes include, but are not limited to, 6:3:1, 7:2:1, 5:3:2, 6:2:2, and 5:4:1.

[0009] In a more preferred embodiment, the mass ratio of the natural rubber SMR 3L, natural rubber STR 5L, and natural rubber SIR 20 is (6-7):(2.5-3.5):(1-1.5).

[0010] In the most preferred embodiment, the mass ratio of natural rubber SMR 3L, natural rubber STR 5L and natural rubber SIR 20 is 6:3:1.5.

[0011] The combination of natural rubbers used in this application effectively improves the overall performance of the rubber compound. The natural rubber combination, through the synergistic interaction of molecular chain structures, constructs an adaptive network system. SMR 3L, as a low-ash matrix, forms a continuous homogeneous phase due to its constant viscosity, effectively blocking the penetration channels of water molecules along ash particles and significantly improving hydrolysis resistance. STR 5L's ultra-long molecular chains generate a high-strength entangled network during vulcanization. When subjected to alternating impact loads, the molecular chains dissipate energy through reversible conformational changes, and the hysteresis effect of stretching and shrinking converts vibrations into heat energy. Simultaneously, crosslinking points inhibit permanent deformation, maintaining the fatigue resistance of the compound system. SIR 20, with its extremely low glass transition temperature and low side methyl structure, maintains the freedom of chain segment movement even in extremely cold environments, avoiding brittle failure during cold starts. The three components work together through an interfacial interpenetration mechanism. The flexible segments of SIR 20 fill the gaps in the STR 5L network, while SMR 3L coats the interface to form a stress buffer layer, thereby enhancing the overall performance of the compound.

[0012] In a preferred embodiment, the mass ratio of the natural rubber compound, activator and filler is (90-110):(4-5):(35-45); the optional mass ratio schemes include but are not limited to 90:5:35, 95:4:40, 105:5:40, and 110:4:35.

[0013] In a more preferred embodiment, the mass ratio of the natural rubber compound, activator, and filler is (100-110):(4.5-5):(35-40).

[0014] In the most preferred embodiment, the mass ratio of the natural rubber compound, activator, and filler is 100:5:38.

[0015] In a preferred embodiment, the activator is at least one of zinc oxide, organic zinc complex, zinc carbonate, and zinc magnesium aluminum hydrotalcite.

[0016] In a more preferred embodiment, the activator is zinc oxide or zinc carbonate.

[0017] In the most preferred embodiment, the activator is zinc oxide.

[0018] In a preferred embodiment, the average particle size of the zinc oxide is 50–150 nm.

[0019] In a preferred embodiment, the antioxidant is at least one selected from 6PPD, TMQ, p-phenylenediamine, plant polyphenols, and vitamin E.

[0020] In a more preferred embodiment, the antioxidant is 6PPD or p-phenylenediamine.

[0021] In the most preferred embodiment, the antioxidant is 6PPD.

[0022] In a preferred embodiment, the internal release agent is at least one of microcrystalline wax, Fischer-Tropsch wax, polyethylene wax, erucamide, and carnauba wax.

[0023] In a more preferred embodiment, the release agent is microcrystalline wax or polyethylene wax.

[0024] In the most preferred embodiment, the release agent is microcrystalline wax.

[0025] In a preferred embodiment, the lubricant is at least one selected from stearic acid, sodium stearate, vegetable oil-based esters, and fatty acids.

[0026] In a more preferred embodiment, the lubricant is stearic acid or sodium stearate.

[0027] In the most preferred embodiment, the lubricant is stearic acid.

[0028] In a preferred embodiment, the filler is a composition of silica and carbon black.

[0029] In a preferred embodiment, the mass ratio of silica to carbon black is (1-2):(5-8); the optional mass ratio schemes include, but are not limited to, 1.5:5.5, 1:8, 2:5, and 1:5.

[0030] In a more preferred embodiment, the mass ratio of silica to carbon black is (1.2-1.6):(6-7).

[0031] In the most preferred embodiment, the mass ratio of silica to carbon black is 1.5:6.5.

[0032] In a preferred embodiment, the average particle size of the silica is 20–100 nm.

[0033] In a preferred embodiment, the average particle size of the carbon black is 200–400 nm.

[0034] In a preferred embodiment, the vulcanizing agent is sulfur.

[0035] In a preferred embodiment, the promoter is at least one of CBS, TBBS, MBT, TMTD, and DPG.

[0036] In a more preferred embodiment, the promoter is CBS or TBBS.

[0037] In the most preferred embodiment, the promoter is CBS.

[0038] In a preferred embodiment, the rubber compound for the elastic support of the wind turbine generator, by weight, further includes: 6-14 parts of composite functional agent, 2-4 parts of flow agent, 1-2 parts of coupling agent, and 3-6 parts of plasticizer.

[0039] In a preferred embodiment, the mass ratio of the natural rubber compound, the composite functional agent, and the plasticizer is (90-110):(8-12):(4-6); the optional mass ratio schemes include, but are not limited to, 90:9:5, 95:12:4, 105:11:5.5, and 110:8:6.

[0040] In a more preferred embodiment, the mass ratio of the natural rubber compound, the composite functional agent, and the plasticizer is (100-110):(9-11):(4.5-5.5).

[0041] In the most preferred embodiment, the mass ratio of the natural rubber compound, the composite functional agent, and the plasticizer is 100:9.5:5.

[0042] In a preferred embodiment, the composite functional agent is a composition of cashew phenol-modified phenolic resin, epoxidized natural rubber, and hydrogenated polybutadiene.

[0043] In a preferred embodiment, the mass ratio of the cashew phenol-modified phenolic resin, epoxidized natural rubber, and hydrogenated polybutadiene is (5-7):(2-4):(1-1.5); the optional mass ratio schemes include, but are not limited to, 5:4:1.5, 7:2:1, and 6:3:1.2.

[0044] In a more preferred embodiment, the mass ratio of the cashew phenol-modified phenolic resin, epoxidized natural rubber, and hydrogenated polybutadiene is (5.5-6):(2.5-3):(1-1.2).

[0045] In the most preferred embodiment, the mass ratio of the cashew phenol-modified phenolic resin, epoxidized natural rubber, and hydrogenated polybutadiene is 5.5:2.5:1.

[0046] Further improvements are made to the various properties of the compound rubber through composite functional agents. The long alkyl chains of cashew phenol resin form a dense molecular fence, and the phenolic hydroxyl groups chelate metal ions, reducing the swelling rate of hydrocarbon solvents. The epoxy groups of epoxidized natural rubber ring-bond with the silanol groups of silica, strengthening the filler-rubber interface. The hydrogen bonds of its polar groups lock in water, ensuring the stability of high wet modulus. On the other hand, hydrogenated polybutadiene eliminates ozone attack sites with saturated carbon chains, and its low pour point characteristics inhibit low-temperature crystallization of rubber. The three work together to shield against corrosive media, stabilize the internal network, and improve environmental tolerance, so that the dynamic stiffness still maintains excellent performance under specific environments, replacing the functional characteristics of synthetic rubber.

[0047] In a preferred embodiment, the flow agent is at least one selected from oxidized polyethylene wax, amide-modified wax, polytetrafluoroethylene micropowder, and organosilicon compounds.

[0048] In a more preferred embodiment, the flow agent is oxidized polyethylene wax or an organosilicon.

[0049] In the most preferred embodiment, the flow agent is oxidized polyethylene wax.

[0050] In a preferred embodiment, the coupling agent is at least one of silane coupling agents.

[0051] In a preferred embodiment, the plasticizer is at least one selected from dioctyl sebacate, dioctyl succinate, hydrogenated castor oil, polyesters, and citrate esters.

[0052] In a more preferred embodiment, the plasticizer is dioctyl sebacate or citrate.

[0053] In the most preferred embodiment, the plasticizer is dioctyl sebacate.

[0054] A method for preparing the above-mentioned rubber compound for the elastic support of wind turbine generator includes the following steps: S1: Preheating the mixing chamber and adding natural rubber compound for plasticizing; S2: Adding composite functional agents, activators, antioxidants, lubricants, release agents, fillers, coupling agents and plasticizers for mixing, then heating and adding flow agent, mixing again, passing through thin sheets and cooling to obtain masterbatch; S3: Adding masterbatch to a two-roll mill, slowly adding vulcanizing agent and accelerator, then high-temperature vulcanization to complete the process.

[0055] A more preferred embodiment of the method for preparing the rubber compound for the elastic support of the wind turbine includes the following steps: S1: Preheat the mixing chamber to 80-85°C, and add natural rubber compound for 2-3 minutes for plasticizing; S2: Add composite functional agents, activators, antioxidants, lubricants, release agents, fillers, coupling agents, and plasticizers, and mix at 40-60 rpm for 4-6 minutes. Then, raise the temperature to 95-105°C, add a flow agent, and mix at 60-80 rpm for 3-5 minutes. The discharge temperature is ≤110°C, and the mixture is sheeted and cooled for 24-26 hours to obtain the masterbatch; S3: Set the open mill roller temperature to 40-45°C, add the masterbatch and wrap it around the rollers, slowly add vulcanizing agents and accelerators, and then vulcanize at 150-160°C for 10-15 minutes to obtain the final product.

[0056] This application has practical significance and beneficial effects:

[0057] 1. The rubber compound obtained by this application not only has excellent comprehensive properties such as temperature resistance, aging resistance and corrosion resistance, but also completely eliminates the addition of synthetic rubber. This significantly improves environmental friendliness while avoiding greater interfacial compatibility problems, breaks away from the framework of petroleum-based synthetic rubber, and improves the fatigue life and service quality of the compound material.

[0058] 2. The natural rubber compound used in this application achieves its combined effect through the interfacial interpenetration mechanism by the combined action of three compound rubbers. The flexible segments of SIR 20 fill the gaps in the STR 5L network, and SMR 3L covers the interface to form a stress buffer layer, thereby enhancing the overall performance of the compound.

[0059] 3. This application further improves the various properties of the compound rubber by using composite functional agents. The three raw materials used work together to shield corrosive media, stabilize the internal network, and enhance environmental resistance, so that the dynamic stiffness can still maintain excellent performance under specific environments, thus replacing the functional characteristics of synthetic rubber. Detailed Implementation

[0060] Example 1

[0061] A rubber compound for elastic support of wind turbine generators, by weight, comprises the following raw materials: 100 parts natural rubber, 5 parts activator, 2.3 parts antioxidant, 2.6 parts release agent, 1.5 parts lubricant, 38 parts filler, 3 parts vulcanizing agent, 2 parts accelerator, 9.5 parts composite functional agent, 3.5 parts flow agent, 1.8 parts coupling agent, and 5 parts plasticizer.

[0062] The natural rubber blend is a combination of natural rubber SMR 3L, natural rubber STR 5L and natural rubber SIR 20 in a mass ratio of 6:3:1.5; SMR 3L is Malaysian standard rubber; STR 5L is Thai standard rubber; and SIR 20 is Indonesian standard rubber.

[0063] The activator is zinc oxide with an average particle size of 80 nm; the antioxidant is antioxidant 6PPD; the release agent is microcrystalline wax; and the lubricant is stearic acid.

[0064] The filler is a composition of silica and carbon black in a mass ratio of 1.5:6.5; the average particle size of silica is 40 nm and the average particle size of carbon black is 250 nm.

[0065] The vulcanizing agent is sulfur; the accelerator is CBS; the flow agent is oxidized polyethylene wax, industrial grade, from Wuhan Xindongyi Chemical Co., Ltd.; the coupling agent is Si69; and the plasticizer is dioctyl sebacate.

[0066] The composite functional agent is a composition of cashew phenol-modified phenolic resin, epoxidized natural rubber and hydrogenated polybutadiene, with a mass ratio of 5.5:2.5:1.

[0067] Cashew phenol-modified phenolic resin, NC-510, from Cardolite, USA; epoxidized natural rubber, industrial grade, from Shandong Senya New Materials, China; hydrogenated polybutadiene, industrial grade, from Shanghai Wandao Chemical.

[0068] A method for preparing the above-mentioned rubber compound for the elastic support of wind turbine generators specifically includes the following steps: S1: Preheat the mixing chamber to 85°C, add natural rubber compound and plasticize for 3 minutes; S2: Add composite functional agent, activator, antioxidant, lubricant, release agent, filler, coupling agent and plasticizer, mix at 60 rpm for 5 minutes, then raise the temperature to 105°C and add flow agent, mix at 80 rpm for 5 minutes, discharge temperature ≤110°C, thin sheet and cool for 24 hours to obtain masterbatch; S3: Set the open mill roll temperature to 45°C, add masterbatch and wrap the rolls, slowly add vulcanizing agent and accelerator, then vulcanize at 160°C for 15 minutes to obtain the final product.

[0071] Example 2

[0072] This embodiment differs from Embodiment 1 only in the following aspects: A rubber compound for elastic support of wind turbine generators, by weight, comprises the following raw materials: 100 parts of natural rubber, 4 parts of activator, 2.3 parts of antioxidant, 2.6 parts of release agent, 1.5 parts of lubricant, 40 parts of filler, 3 parts of vulcanizing agent, 2 parts of accelerator, 9.5 parts of composite functional agent, 3.5 parts of flow agent, 1.8 parts of coupling agent, and 5 parts of plasticizer.

[0073] The natural rubber blend is a combination of natural rubber SMR 3L, natural rubber STR 5L and natural rubber SIR 20 in a mass ratio of 6:2.5:1.

[0074] All other implementation schemes are the same.

[0075] Example 3

[0076] This embodiment differs from Embodiment 1 only in the following aspects: A rubber compound for elastic support of wind turbine generators, by weight, comprises the following raw materials: 100 parts of natural rubber, 5 parts of activator, 2.3 parts of antioxidant, 2.6 parts of release agent, 1.5 parts of lubricant, 38 parts of filler, 3 parts of vulcanizing agent, 2 parts of accelerator, 8.5 parts of composite functional agent, 3.5 parts of flow agent, 1.8 parts of coupling agent, and 4.2 parts of plasticizer.

[0077] The composite functional agent is a composition of cashew phenol-modified phenolic resin, epoxidized natural rubber and hydrogenated polybutadiene, in a mass ratio of 6:2:1.5.

[0078] All other implementation schemes are the same.

[0079] Comparative Example 1

[0080] The only difference between this comparative example and Example 1 is as follows: A rubber compound for elastic support of wind turbine generators, by weight, comprises: 100 parts of natural rubber, 5 parts of activator, 2.3 parts of antioxidant, 2.6 parts of release agent, 1.5 parts of lubricant, 38 parts of filler, 3 parts of vulcanizing agent, 2 parts of accelerator, 2.5 parts of composite functional agent, 3.5 parts of flow agent, 1.8 parts of coupling agent, and 5 parts of plasticizer.

[0081] All other implementation schemes are the same.

[0082] Comparative Example 2

[0083] The only difference between this comparative example and Example 1 is as follows: A rubber compound for elastic support of wind turbine generators, by weight, comprises: 100 parts of natural rubber, 5 parts of activator, 2.3 parts of antioxidant, 2.6 parts of release agent, 1.5 parts of lubricant, 34 parts of filler, 3 parts of vulcanizing agent, 2 parts of accelerator, 18.5 parts of composite functional agent, 3.5 parts of flow agent, 1.8 parts of coupling agent, and 5 parts of plasticizer.

[0084] All other implementation schemes are the same.

[0085] Comparative Example 3

[0086] This comparative example differs from Example 1 only in the following aspect: the natural rubber composition is a combination of natural rubber SMR 3L, natural rubber STR 5L, and natural rubber SIR 20 in a mass ratio of 9:1:0.5.

[0087] All other implementation schemes are the same.

[0088] Comparative Example 4

[0089] This comparative example differs from Example 1 only in the following aspect: the natural rubber composition is a combination of natural rubber SMR 3L, natural rubber STR 5L, and natural rubber SIR 20 in a mass ratio of 3:4:3.5.

[0090] All other implementation schemes are the same.

[0091] Comparative Example 5

[0092] The only difference between this comparative example and Example 1 is that the composite functional agent is a composition of cashew phenol-modified phenolic resin, epoxidized natural rubber and hydrogenated polybutadiene in a mass ratio of 8:1:0.5.

[0093] All other implementation schemes are the same.

[0094] Comparative Example 6

[0095] The only difference between this comparative example and Example 1 is that the composite functional agent is a combination of epoxidized natural rubber and hydrogenated polybutadiene in a mass ratio of 3:1.

[0096] All other implementation schemes are the same.

[0097] Performance testing

[0098] 1. Mechanical properties: The test shall be conducted in accordance with GB / T 528. The test results of tensile strength and elongation at break shall be the average of 10 tests and recorded in Table 1.

[0099] 2. Tear resistance: The test shall be conducted in accordance with GB / T 529. The tear strength test results shall be the average of 10 tests and recorded in Table 1.

[0100] 3. Resilience: The test is conducted in accordance with GB / T 1681. The results of the resilience test are the average of 10 tests and recorded in Table 1.

[0101] 4. Abrasion resistance: The test shall be conducted in accordance with GB / T 9867. The abrasion resistance test results shall be the average of 10 tests and recorded in Table 1.

[0102] 5. Low-temperature resilience: The test is conducted in accordance with GB / T 1681-2009. The sample is placed in a low-temperature chamber and left at room temperature for 24 hours to test the resilience value. Then, it is kept at -25℃ for 2 hours and the resilience value is tested again. The low-temperature resilience retention rate is recorded and the average of 10 tests is recorded in Table 1.

[0103] Table 1 Performance Test Results

[0104]

[0105]

[0106] Compared with Comparative Examples 1-6, Examples 1-3 of this application achieved superior performance test results. This is mainly due to the technical solutions specified in this application used in Examples 1-3. The natural rubber combination used achieves a combined effect through the interfacial interpenetration mechanism of the three compound rubbers. The flexible segments of SIR 20 fill the gaps in the STR 5L network, and SMR 3L coats the interface to form a stress buffer layer, thereby enhancing the overall performance of the compound. Furthermore, the compound functional agents further improve the various properties of the compound. The three raw materials work together to shield against corrosive media, stabilize the internal network, and improve environmental tolerance, so that the dynamic stiffness still maintains excellent performance under specific environments, replacing the functional characteristics of synthetic rubber.

[0107] Comparative Examples 1 to 6, however, adopted raw material selection and proportions different from those specified in this application, which resulted in their respective raw materials failing to exert their maximum effect in the compound rubber system, leading to a significant decrease in their respective properties and overall performance.

Claims

1. A rubber compound for elastic support of wind turbine generators, characterized in that: By weight, the raw materials include at least: 90-110 parts of natural rubber blend, 3-6 parts of activator, 2-4 parts of antioxidant, 2-3.5 parts of internal release agent, 1-2 parts of lubricant, 30-45 parts of filler, 2-3 parts of vulcanizing agent, and 2-3 parts of accelerator. The natural rubber composition is a combination of natural rubber SMR 3L, natural rubber STR 5L and natural rubber SIR 20, in a mass ratio of (5-7):(2-4):(1-2).

2. The rubber compound for elastic support of wind turbine generator according to claim 1, characterized in that: The natural rubber compound has an activator and filler in a mass ratio of (90-110):(4-5):(35-45).

3. The rubber compound for elastic support of wind turbine generator according to claim 2, characterized in that: The activator is at least one of zinc oxide, organic zinc complex, zinc carbonate, and zinc magnesium aluminum hydrotalcite; the antioxidant is at least one of 6PPD, TMQ, p-phenylenediamine, plant polyphenols, and vitamin E.

4. The rubber compound for elastic support of wind turbine generator according to claim 3, characterized in that: The release agent is at least one of microcrystalline wax, Fischer-Tropsch wax, polyethylene wax, erucamide, and carnauba wax; the lubricant is at least one of stearic acid, sodium stearate, vegetable oil ester, and fatty acid.

5. The rubber compound for elastic support of wind turbine generator according to claim 4, characterized in that: The filler is a composition of silica and carbon black in a mass ratio of (1-2):(5-8).

6. The rubber compound for elastic support of wind turbine generator according to claim 5, characterized in that: The average particle size of the silica is 20–100 nm; the average particle size of the carbon black is 200–400 nm.

7. The rubber compound for elastic support of wind turbine generator according to claim 1, characterized in that: The rubber compound for the elastic support of the wind turbine generator, by weight, also includes: 6-14 parts of composite functional agent, 2-4 parts of flow agent, 1-2 parts of coupling agent, and 3-6 parts of plasticizer.

8. The rubber compound for elastic support of wind turbine generator according to claim 7, characterized in that: The mass ratio of the composite functional agent and the plasticizer in the natural rubber compound is (90-110):(8-12):(4-6).

9. The rubber compound for elastic support of wind turbine generator according to claim 8, characterized in that: The composite functional agent is a composition of cashew phenol-modified phenolic resin, epoxidized natural rubber and hydrogenated polybutadiene, in a mass ratio of (5-7):(2-4):(1-1.5).

10. A method for preparing a rubber compound for elastic support of a wind turbine according to any one of claims 7 to 9, characterized in that: S1: Natural rubber is preheated in the mixing chamber and then plasticized. S2: Compound functional agents, activators, antioxidants, lubricants, release agents, fillers, coupling agents, and plasticizers are added and mixed. Then, the temperature is raised and a flow agent is added. The mixture is mixed again, thin sheets are passed through and cooled to obtain the masterbatch. S3: The masterbatch is added to the open mill and rolled onto rollers. Vulcanizing agents and accelerators are slowly added. Then, high-temperature vulcanization is carried out to obtain the final product.

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