A solid medium damper

Abstract

The present invention provides a solid medium damper, including a cylinder with a cavity, and a piston arranged in the cylinder cavity, characterized in that the two ends of the piston are provided with left and right guide rods connected thereto, and the left and right guide rods are provided with corresponding left and right plugs through wear-resistant rings, and left and right chambers are formed between the left and right plugs and the corresponding piston ends, and the left and right chambers are filled with solid damping medium, and the left and right chambers are interconnected through the gap between the piston and the cylinder, so that the solid damping medium in the left and right chambers can move relative to each other under stress. It is used to dissipate the energy entering the structure, reduce the structural vibration, and protect the safety of the main structure, while fundamentally solving the problem of silicone oil leakage caused by the prior art of using silicone oil for vibration reduction, which leads to the failure of the damper, improving the stability of the damper, extending the service life, and reducing the sealing requirements.

Description

Technical Field

[0001] The invention relates to a solid medium damper and belongs to the technical field of shock absorption. Background Art

[0002] Passive control technology for structural vibration reduction has a good application prospect in the field of civil engineering earthquake resistance because of its significant advantage of reducing the destructive effect of earthquake energy on structures, and has received widespread attention from the engineering community. Among them, viscous dampers have been widely used in many projects. Traditional viscous dampers have the characteristics of low stiffness and high damping. Their vibration reduction mechanism is to dissipate the energy entering the structure through the viscosity characteristics and pore shrinkage effect of the damping medium, thereby achieving the purpose of reducing structural vibration and protecting the safety of the main structure. However, the viscous dampers in the prior art mainly use silicone oil as the damping medium, which not only has high requirements for sealing, but also inevitably leaks silicone oil when it is static and in use, which weakens the energy dissipation effect of the damper and even causes the damper to fail. Summary of the invention

[0003] In order to overcome the shortcomings and defects of the existing viscous damper, the problem to be solved by the present invention is to provide a solid medium damper.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a solid medium damper, including a cylinder body with a cavity, and a piston arranged in the cylinder body cavity, characterized in that left and right guide rods connected to the piston are provided at both ends, and corresponding left and right plugs are provided on the left and right guide rods through wear-resistant rings, and left and right chambers are formed between the left and right plugs and the corresponding piston ends, and the left and right chambers are filled with solid damping medium, and the left and right chambers are connected to each other through the gap between the piston and the cylinder body, so that the solid damping medium in the left and right chambers can move relative to each other under force, so as to dissipate the energy entering the structure, reduce the structural vibration, and protect the safety of the main structure without leaking the solid medium.

[0005] The left end of the piston guide rod is connected to the left connecting head, and the right end is placed in the cavity of the right connecting head. The left and right connecting heads are respectively connected to the connecting components on the building through bearings.

[0006] The wear-resistant parts between the left and right plugs and the guide rods are conventional products.

[0007] The solid medium is made of the following raw materials in parts by weight:

[0008] 30-40 parts of viscoelastic material 20-30 parts of heat dissipation agent

[0009] Energy dissipator 20-30 parts Modulus regulator 10-20 parts

[0010] 1 to 5 parts of antioxidant.

[0011] The viscoelastic material is one or more of halogenated butyl rubber, CPE, SEBS, TPV, TPU, natural rubber, silicone rubber, fluororubber, and POE, and the ratio of the materials is arbitrary.

[0012] The heat dissipating agent is one or more of copper powder, silver powder, graphene, carbon fiber, zinc oxide, magnesium oxide, and mica powder, and when the above-mentioned heat dissipating agent is combined, the proportion of copper powder is not less than 30%.

[0013] The energy dissipator is one or more of terpene resin, phenolic resin, C5 resin, C9 resin and hydrogenated hydrocarbon resin, and when the above-mentioned energy dissipator is mixed, the proportion of C5 resin is not less than 30%.

[0014] The modulus regulator is one or more of carbon black, white carbon black, engine oil, lubricating oil, molybdenum disulfide, dibutyl ester, and dioctyl ester, and the ratio of the several agents is arbitrary.

[0015] The engine oil and lubricating oil can be any conventional ones.

[0016] The antioxidant is one or more of diphenylamine, p-phenylenediamine, didodecanol ester, and 2,6-di-tert-butyl-p-cresol, and the ratio of the antioxidant is arbitrary.

[0017] A solid medium provided by the present invention is prepared by the following process steps:

[0018] A. Prepare the materials according to the following mass proportions

[0019] 30-40 parts of viscoelastic material 20-30 parts of heat dissipation agent

[0020] Energy dissipator 20-30 parts Modulus regulator 10-20 parts

[0021] 1 to 5 parts of antioxidant;

[0022] B. Put the viscoelastic material into an internal mixer, plasticize for 8 to 12 minutes at a temperature of 100 to 150°C, discharge the material, and leave it for more than 8 hours to obtain a plasticized viscoelastic material;

[0023] C. Put the plasticized viscoelastic material of step B and the heat dissipator, energy dissipator, modulus regulator and antioxidant of step A into an internal mixer in sequence, mix them at a temperature of 100-120° C. for 6-10 min, discharge them, send them into an open mixer for tableting, adjust the thickness to 3-10 mm, cool them, and leave them for more than 4 hours to obtain a solid damping material.

[0024] The present invention has the following advantages and effects: By adopting the above scheme, the solid media in the left and right chambers can be easily moved relative to each other under stress, which is used to dissipate the energy entering the structure, reduce the structural vibration, and protect the safety of the main structure, while fundamentally solving the problem of silicone oil leakage and damper failure caused by the prior art of using silicone oil for vibration reduction, thereby improving the stability of the damper and extending its service life. The obtained solid medium uses viscoelastic material as the base material, and is coordinated with a specific ratio of heat dissipation agent, energy dissipation agent, modulus regulator, and antioxidant, and adopts a special preparation process, so that it has the advantages of good damping performance, low temperature sensitivity, etc., greatly reducing the sealing requirements, and the damper structure is simpler and more reliable than the existing structure, which greatly reduces the manufacturing difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 for Figure 1 Enlarged view of part A.

[0027] In the figure: 1-cylinder body, 2-left plug, 3-right plug, 4-left connector, 5-right connector, 6-solid medium, 7, 8-bearings, 9-wear-resistant ring, 10-piston connected to the guide rod, 11-gap. DETAILED DESCRIPTION

[0028] The solid medium damper provided by the present invention comprises a cylinder body 1 with a cavity, a piston 10 arranged in the cavity of the cylinder body 1, and a guide rod integrally connected to both ends of the piston 10, the guide rod is provided with left and right plugs 2 and 3 through a wear-resistant ring 9, and left and right chambers are respectively formed between the left and right plugs 2 and 3 and the corresponding ends of the piston 10, the left and right chambers are filled with solid medium 6, and the left and right chambers are interconnected through a gap 11 between the piston 10 and the cylinder body 1, so that the solid medium in the left and right chambers moves relative to each other under force, so that the energy entering the structure can be dissipated, the structural vibration can be reduced, and the safety of the main structure can be protected without leaking the solid medium; the left end of the guide rod of the piston 10 is connected to the left connector 4, and the right end is placed in the cavity of the right connector 5, and the left and right connectors 4 and 5 are respectively connected to the connecting components on the building through bearings.

[0029] When the damper is working, the guide rod drives the piston 10 to move left or right in the cavity of the cylinder 1, thereby squeezing the solid medium 6, so that the solid medium 6 moves between the left and right chambers through the gap 11 between the piston 10 and the cylinder 1, relying on the energy loss along the way and the pore shrinkage effect to dissipate the energy entering the structure, reduce structural vibration, and protect the safety of the main structure. At the same time, it fundamentally solves the problem of silicone oil leakage caused by the use of silicone oil for vibration reduction in the prior art, which leads to the failure of the damper, improves the stability of the damper, and extends its service life.

[0030] The preparation of the solid medium of the present invention is further described below with reference to the examples.

[0031] Example 1

[0032] 1. Prepare the following materials by weight: 20 parts of halogenated butyl rubber, 15 parts of CPE, 20 parts of copper powder, 10 parts of graphene, 5 parts of terpene resin, 5 parts of phenolic resin, 15 parts of C5 resin, 5 parts of carbon black, 5 parts of molybdenum disulfide, and 2 parts of diphenylamine;

[0033] 2. Take the halogenated butyl rubber and CPE and put them into an internal mixer. At a temperature of 120°C, plasticize for 8 minutes and discharge the materials. Let them stand for more than 8 hours to obtain a plasticized elastomer substrate.

[0034] 3. The plasticized substrate in step 2 and the copper powder, graphene, terpene resin, phenolic resin, C5 resin, carbon black, molybdenum disulfide and diphenylamine in step 1 are sequentially put into an internal mixer, mixed at 100°C for 8 min, discharged, sent to an open mixer for tableting, adjusted the thickness to 5 mm, cooled, and parked for more than 4 hours to obtain a solid damping material;

[0035] The performance indicators of the obtained solid damping material are as follows: Mooney viscosity (ML 1+4 125°C) 55, loss factor 0.50, loss modulus 4.0 MPa, elastic modulus 8.0 MPa.

[0036] Example 2

[0037] 1. Prepare the following materials by weight: 20 parts of SEBS, 15 parts of POE, 25 parts of copper powder, 5 parts of carbon fiber, 5 parts of phenolic resin, 15 parts of C5 resin, 5 parts of C9 resin, 10 parts of white carbon black, and 2 parts of p-phenylenediamine;

[0038] 2. Take SEBS and POE and put them into an internal mixer. At a temperature of 110°C, plasticize for 10 minutes and discharge the materials. Let them stand for more than 8 hours to obtain a plasticized elastomer substrate.

[0039] 3. The plasticized substrate in step 2, copper powder, carbon fiber, phenolic resin, C5 resin, C9 resin, white carbon black, and p-phenylenediamine are sequentially placed in an internal mixer, mixed at 110°C for 10 min, discharged, and sent to an open mixer for tableting, the thickness is adjusted to 7 mm, cooled, and parked for more than 4 hours to obtain a solid damping material;

[0040] The performance indicators of the obtained solid damping material are as follows: Mooney viscosity (ML 1+4 125°C) 45, loss factor 0.61, loss modulus 5.0 MPa, elastic modulus 8.2 MPa.

[0041] Example 3

[0042] 1. Prepare the following materials by weight: 30 parts of natural rubber, 10 parts of TPV, 30 parts of copper powder, 30 parts of hydrogenated hydrocarbon resin, 20 parts of engine oil, and 5 parts of didodecanol ester;

[0043] 2. Take natural rubber and TPV and put them into an internal mixer. At a temperature of 125°C, plasticize for 9 minutes, discharge the materials, and leave them for more than 8 hours to obtain a plasticized elastomer substrate.

[0044] 3. The plasticized substrate in step 2 and the copper powder, hydrogenated hydrocarbon resin, engine oil and didodecyl alcohol ester in step 1 are sent to an internal mixer, mixed at 105°C for 9 minutes, discharged, sent to an open mixer for tableting, adjusted to a thickness of 8 mm, cooled, and parked for more than 4 hours to obtain a solid elastomer damping material;

[0045] The performance indicators of the obtained solid damping material are as follows: Mooney viscosity (ML 1+4 125°C) 56, elastic modulus 8 MPa, loss factor 0.71, loss modulus 6.0 MPa, and shear modulus 8.5 MPa.

[0046] Example 4

[0047] 1. Prepare the following materials by weight: 20 parts of silicone rubber, 10 parts of POE, 10 parts of copper powder, 5 parts of zinc oxide, 5 parts of mica powder, 10 parts of phenolic resin, 15 parts of C5 resin, 5 parts of white carbon black, 10 parts of dibutyl ester, 2 parts of diphenylamine, and 2 parts of p-phenylenediamine;

[0048] 2. Put silicone rubber and POE into an internal mixer, plasticize for 11 min at 135°C, and leave for more than 8 h to obtain a plasticized elastomer substrate;

[0049] 3. The plasticized substrate in step 2 and the copper powder, zinc oxide, mica powder, phenolic resin, C5 resin, white carbon black, dibutyl ester, diphenylamine and p-phenylenediamine in step 1 are sequentially fed into an internal mixer, mixed at 115°C for 7 min, discharged, fed into an open mixer for tableting, adjusted to a thickness of 4 mm, cooled, and parked for more than 4 h to obtain a solid damping material;

[0050] The performance indicators of the obtained solid damping material are as follows: Mooney viscosity (ML 1+4 125°C) 50, loss factor 0.71, loss modulus 6.0 MPa, elastic modulus 8.4 MPa.

[0051] Example 5

[0052] 1. Prepare the following materials by weight: 20 parts of halogenated butyl rubber, 15 parts of TPU, 20 parts of copper powder, 10 parts of silver powder, 15 parts of terpene resin, 10 parts of C9 resin, 10 parts of carbon black, 5 parts of lubricating oil, and 3 parts of 2,6-di-tert-butyl-p-cresol;

[0053] 2. Put the halogenated butyl rubber and TPU into an internal mixer, and plasticize for 9 minutes at 120°C, and then discharge the materials. Then, let them stand for more than 8 hours to obtain a plasticized elastomer substrate.

[0054] 3. The plasticized substrate in step 2 and the copper powder, silver powder, terpene resin, C9 resin, carbon black, lubricating oil and 2,6-di-tert-butyl-p-cresol in step 1 are sequentially fed into an internal mixer, mixed at 110°C for 7 minutes, discharged, fed into an open mixer for tableting, adjusted to a thickness of 6 mm, cooled, and left for more than 4 hours to obtain a solid damping material;

[0055] The performance indicators of the obtained solid damping material are as follows: Mooney viscosity (ML 1+4 125°C) 57, loss factor 0.79, loss modulus 6.5 MPa, elastic modulus 8.2 MPa.

[0056] Example 6

[0057] 1. Prepare the following materials by weight: 20 parts of SEBS, 15 parts of fluororubber, 20 parts of copper powder, 10 parts of magnesium oxide, 15 parts of terpene resin, 10 parts of hydrogenated hydrocarbon resin, 10 parts of white carbon black, 5 parts of dioctyl ester, 2 parts of didodecanol ester, and 2 parts of 2,6-di-tert-butyl-p-cresol;

[0058] 2. Take SEBS and fluororubber and put them into an internal mixer. At a temperature of 130°C, plasticize for 10 minutes and discharge the materials. Let them stand for more than 8 hours to obtain a plasticized elastomer substrate.

[0059] 3. The plasticized substrate of step 2 and the copper powder, magnesium oxide, terpene resin, hydrogenated hydrocarbon resin, white carbon black, dioctyl ester, didodecyl alcohol ester and 2,6-di-tert-butyl-p-cresol of step 1 are sequentially fed into an internal mixer, mixed at 115°C for 8 min, discharged, fed into an open mixer for tableting, adjusted to a thickness of 5 mm, cooled, and parked for more than 4 h to obtain a solid damping material;

[0060] The performance indicators of the obtained solid damping material are as follows: Mooney viscosity (ML 1+4 125°C) 65, loss factor 0.61, loss modulus 5.5 MPa, elastic modulus 9.0 MPa.

Claims

1. A solid medium damper, comprising a cylinder with a cavity, a piston arranged in the cylinder cavity, characterized in that The two ends of the piston are provided with left and right guide rods connected thereto as one body, and the left and right guide rods are provided with corresponding left and right plugs through wear-resistant rings, and left and right chambers are formed between the left and right plugs and the corresponding piston ends, and the left and right chambers are filled with solid damping medium, and the left and right chambers are connected to each other through the gap between the piston and the cylinder body, so that the solid damping medium in the left and right chambers can move relative to each other under force; The left end of the piston guide rod is connected to the left connector, and the right end is placed in the cavity of the right connector. The left and right connectors are respectively connected to the connecting components on the building through bearings; The solid damping medium is made of the following raw materials in parts by weight: 30-40 parts of viscoelastic material 20-30 parts of heat dissipation agent Energy dissipator 20-30 parts Modulus regulator 10-20 parts 1 to 5 parts of antioxidant; The viscoelastic material is one or more of halogenated butyl rubber, CPE, SEBS, natural rubber, silicone rubber, and fluororubber, and the ratio of the materials is arbitrary; The heat dissipating agent is one or more of copper powder, silver powder, graphene, carbon fiber, zinc oxide, magnesium oxide, and mica powder, and when the above-mentioned materials are combined, the proportion of copper powder is not less than 30%; The energy dissipator is one or more of terpene resin, phenolic resin, C5 resin and C9 resin, and when the above-mentioned energy dissipator is mixed, the proportion of C5 resin is not less than 30%; The modulus regulator is one or more of carbon black, white carbon black, and molybdenum disulfide, and the ratio of the several agents is arbitrary; The antioxidant is one or more of diphenylamine, p-phenylenediamine, didodecanol ester, and 2,6-di-tert-butyl-p-cresol, and the ratio of the antioxidant is arbitrary. The solid damping medium is prepared by the following process steps: A. Put the viscoelastic material into an internal mixer, plasticize for 8 to 12 minutes at a temperature of 100 to 150°C, discharge the material, and leave it for more than 8 hours to obtain a plasticized viscoelastic material; B. Put the plasticized viscoelastic material of step A, the heat dissipator, the energy dissipator, the modulus regulator and the antioxidant into an internal mixer in sequence, mix them at a temperature of 100 to 120° C. for 6 to 10 min, discharge them, send them into an open mixer for tableting, adjust the thickness to 3 to 10 mm, cool them, and leave them for more than 4 hours to obtain a solid damping material.

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