CN111303499A - Oil-resistant and high-temperature-resistant damping rubber and preparation method and application thereof - Google Patents
Oil-resistant and high-temperature-resistant damping rubber and preparation method and application thereof Download PDFInfo
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- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/3605—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
- F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
- F16F3/10—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction
- F16F3/12—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction the steel spring being in contact with the rubber spring
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- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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Abstract
The invention belongs to the technical field of noise vibration control, and particularly relates to oil-resistant and high-temperature-resistant damping rubber as well as a preparation method and application thereof. The oil-resistant high-temperature-resistant damping rubber comprises 80-100 parts of nitrile rubber, 10-30 parts of chlorinated butyl rubber, 50-70 parts of filler and 32-82 parts of auxiliary agent. The damping rubber takes the chlorinated butyl rubber with weak polarity and the nitrile rubber with strong polarity as blending components, the working temperature range of the rubber can be widened, the internal friction damping of the rubber can be greatly improved, the vibration isolation effect is optimized, the damping rubber has better damping vibration isolation performance, when the rubber is used for a transformer and a reactor, the noise can be effectively reduced and transmitted outwards, the vibration transmission efficiency of the transformer and the reactor body to an oil tank is reduced, meanwhile, the rubber has better oil resistance and high temperature resistance, and the service time of the rubber in insulating oil under the high-temperature condition is long.
Description
Technical Field
The invention belongs to the technical field of noise vibration control, and particularly relates to oil-resistant and high-temperature-resistant damping rubber as well as a preparation method and application thereof.
Background
In order to meet the requirements of long-distance and trans-regional electric energy transmission, extra-high voltage projects are continuously constructed and developed, the working load of sound source equipment such as transformers and reactors is kept at a high level throughout the year, and the sound pressure level of a generated near field reaches 75-80dB (A), so that the transformer substation and converter station boundaries face the pressure of exceeding the noise emission standard, and the life quality of surrounding residents is seriously influenced. The conventional noise reduction engineering generally selects to install a box-in sound insulation cover or install a sound barrier at a station boundary. However, the former hinders the equipment from daily inspection and maintenance, especially the fire rescue when a fire accident happens, the top cover wall of all converter station sound insulation covers is cancelled, the acoustic sealing function is damaged, and the protection range of the latter is limited. In order to avoid the limitation of such auxiliary noise reduction technology, the noise reduction technology of the sound source equipment body is continuously developed.
The noise of the transformer is from the magnetostriction of the iron core, and the noise of the reactor is from the interaction of the iron core cake under the action of the Lorentz force. The iron core and the fuel tank wall are rigidly connected, and the attenuation amount of the vibration of the iron core after being transmitted to the fuel tank is low, so that the fuel tank wall becomes a secondary sound source. Through the installation of the vibration isolator, the connection mode of the iron core and the oil tank is changed into flexible connection, and the noise emission of equipment can be effectively reduced. Due to the complex electromagnetic environment in the oil tank, the body generates obvious vibration in three-dimensional directions. At present, transformer manufacturers choose to install an insulating paperboard at the bottom of the transformer body, but the vibration isolation effect is limited.
Chinese patent document CN107286405A discloses a damping fin for transformer core lamination, which is located between core laminations, and includes nitrile rubber, vulcanizing agent, activator, accelerator, filler, anti-aging agent, plasticizer and anti-scorching agent, but the damping fin cannot bear large load and cannot be applied to blocking vibration of a transformer body. Chinese patent document CN110319307A discloses a middle-sized transformer damper base, which includes a bottom support plate, a spring damper base, a spacing support bar and an upper support base, but the device cannot reduce the noise of the transformer body, and the device mainly suppresses the vibration in the Z direction in three dimensions.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects of high vibration transmission efficiency from the transformer body and the reactor body to the oil tank, high noise and the like in the prior art, so that the oil-resistant and high-temperature-resistant damping rubber and the preparation method and application thereof are provided.
Therefore, the invention provides the following technical scheme.
The invention provides an oil-resistant high-temperature-resistant damping rubber which comprises the following raw materials in parts by weight,
80-100 parts of nitrile rubber, 10-30 parts of chlorinated butyl rubber, 50-70 parts of filler and 32-82 parts of auxiliary agent.
The auxiliary agent comprises 1-4 parts of vulcanizing agent, 5-10 parts of activating agent, 2-8 parts of accelerator, 3-6 parts of neutralizing agent, 1-4 parts of coupling agent and 20-50 parts of plasticizer.
The filler is carbon black or white carbon black.
The vulcanizing agent is sulfur or benzoyl peroxide;
the active agent is zinc oxide and/or stearic acid;
the accelerator is at least one of sulfenamide accelerator, thiomethyl accelerator, aldehyde amine accelerator and thiazole accelerator;
the neutralizing agent is polyethylene glycol or dimethylethanolamine;
the coupling agent is vinyl triethoxysilane or vinyl trimethoxysilane;
the plasticizer is paraffin oil, phthalate or terephthalate.
The invention also provides a preparation method of the oil-resistant and high-temperature-resistant damping rubber, which comprises the following steps of carrying out first mixing on chlorinated butyl rubber, and then adding nitrile rubber to carry out second mixing;
adding an auxiliary agent for third mixing to obtain a rubber material;
and the rubber material is molded and vulcanized to obtain the oil-resistant and high-temperature-resistant damping rubber.
Further, the concrete operation steps of adding the auxiliary agent to carry out third mixing to obtain the rubber compound comprise,
adding an active agent, an accelerator, a neutralizer, a coupling agent, a part of filler and a part of plasticizer, and then carrying out fourth mixing;
adding the rest plasticizer and the filler for fifth mixing;
and finally, adding a vulcanizing agent and then carrying out sixth mixing to obtain the rubber material.
The invention also provides a vibration isolation device, comprising,
the vibration isolator comprises a first vibration isolating part, a second vibration isolating part and a third vibration isolating part which are sequentially connected; the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece are made of the oil-resistant and high-temperature-resistant damping rubber or the oil-resistant and high-temperature-resistant damping rubber prepared by the preparation method;
at least one support member bolted to the third vibration isolator.
The first vibration isolation piece is in a circular truncated cone shape, the diameter ratio of the upper bottom surface to the lower bottom surface of the circular truncated cone shape is 1 (1.5-2), and the diameter ratio of the height of the circular truncated cone shape to the upper bottom surface is (1-3) to (3-5);
the second vibration isolating piece is cylindrical, and the ratio of the diameter to the height of the cylinder is 1 (2-2.5);
the first vibration isolator is arranged at the top end of the vibration isolator, the third vibration isolator is arranged at the bottom end of the vibration isolator, and the second vibration isolator is arranged between the first vibration isolator and the second vibration isolator.
The third vibration isolator provides a supporting force for the vibration isolator.
The dynamic stiffness of the support member is 1000-5000N/mm, and the damping coefficient is 0.05-0.12;
the supporting piece is a spring, and the components of the spring comprise 0.1-0.4 wt% of C, 0.3-0.6 wt% of Mn, 17-19 wt% of Cr, 0.5-0.7 wt% of Al, 0.1-0.3 wt% of Ni, 2-5.5 wt% of Ti and 3-5 wt% of Mg;
the composition of the spring further comprises not more than 0.2 wt% P and not more than 0.01 wt% S;
the composition of the spring also includes Fe.
The vibration isolation device also comprises a vibration isolation device,
the protective shell is positioned at the top end of the vibration isolation device, is connected with the third vibration isolation piece through a support piece and covers the outer surface of the first vibration isolation piece; the protective shell is made of epoxy resin.
The invention also provides application of the vibration isolation device in vibration reduction and noise reduction of a transformer and/or a reactor.
The technical scheme of the invention has the following advantages:
1. the oil-resistant and high-temperature-resistant damping rubber provided by the invention comprises 80-100 parts of nitrile rubber, 10-30 parts of chlorinated butyl rubber, 50-70 parts of filler and 32-82 parts of auxiliary agent. The damping rubber takes the chlorinated butyl rubber with weak polarity and the nitrile rubber with strong polarity as blending components, the working temperature range of the rubber can be widened, the internal friction damping of the rubber can be greatly improved, the vibration isolation effect is optimized, the damping rubber has better damping vibration isolation performance, when the rubber is used for a transformer and a reactor, the noise can be effectively reduced and transmitted outwards, the vibration transmission efficiency of the transformer and the reactor body to an oil tank is reduced, meanwhile, the rubber has better oil resistance and high temperature resistance, and the service time of the rubber in insulating oil under the high-temperature condition is long.
The rubber matrix formed by blending the nitrile rubber, the chlorinated butyl rubber and the filler and the nitrile rubber and the chlorinated butyl rubber has good weather resistance, and the internal friction resistance between rubbers is increased by adding the filler, so that the damping performance is optimized.
2. The oil-resistant high-temperature-resistant damping rubber provided by the invention has the advantages that the accelerator can promote the crosslinking reaction, the plasticizer can increase the plasticity of the polymer, and the activator can increase the activity of the accelerator.
3. The vibration isolation device comprises a vibration isolator and a support piece, wherein the first vibration isolation piece is arranged at the top end of the vibration isolator, the third vibration isolation piece is arranged at the bottom end of the vibration isolator, and the second vibration isolation piece is arranged between the first vibration isolation piece and the second vibration isolation piece; the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece are made of the oil-resistant and high-temperature-resistant damping rubber, and the supporting piece is connected with the third vibration isolating piece of the vibration isolator through bolts. The device adopts the rubber and the supporting piece provided by the invention to form a composite vibration isolation structure, has good vibration isolation effect in three-dimensional directions, has stable vibration isolation function, and simultaneously has better mechanical property and long service life in insulating oil under high temperature conditions.
The first vibration isolation piece, the second vibration isolation piece and the third vibration isolation piece are made of rubber provided by the invention, so that the damping vibration isolation effect of the device can be further improved.
The first vibration isolation piece in the vibration isolation device is in a round table shape, the second vibration isolation piece is in a cylindrical shape, the damping effect of the vibration isolation device can be enhanced, and the vibration isolation capability of the vibration isolation device in the three-dimensional direction is further ensured.
The protective shell is arranged at the top of the vibration isolation device, the supporting piece is connected with the protective shell and the third vibration isolation piece, the third vibration isolation piece bears main load, the spring is made of nonmagnetic metal, the elastic deformation performance and the damping performance are excellent, the pressure borne by damping rubber is relieved, and the service life of the three-dimensional vibration isolation device provided by the invention is prolonged.
The spring provided by the invention is prepared from non-magnetic steel, does not generate an eddy heating effect in a transformer magnetic field environment, and can bear a larger load.
4. The vibration isolation device provided by the invention is applied to noise reduction of a transformer or a reactor, and can effectively reduce noise generated by the transformer or the reactor body, fundamentally reduce noise emission and reduce vibration generated by the reactor body in three-dimensional directions.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic front view of a vibration isolation device in embodiment 1 of the present invention;
FIG. 2 is a schematic top view of the vibration isolation device in the embodiment 1 of the present invention;
reference numerals:
1-a protective shell; 2-vibration isolator; 3-a spring; 4-a bolt;
2-1-a first vibration isolator; 2-2-a second vibration isolation member; 2-3-third vibration isolation.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
The spring provided by the invention is made of non-magnetic steel, and in the following embodiment, the preparation method of the spring can be that the non-magnetic steel is cut firstly, after being cold-drawn to a certain wire diameter, a steel wire is coiled into a spiral shape by adopting an automatic spring coiling machine, and after stress relief annealing, strong pressure treatment is carried out to obtain the spring.
Example 1
The embodiment provides an oil-resistant and high-temperature-resistant damping rubber, which comprises 80kg of nitrile rubber, 10kg of chlorinated butyl rubber, 1kg of sulfur (vulcanizing agent), 2kg of zinc oxide (active agent), 3kg of stearic acid (active agent), 1kg of N-cyclyl-2-benzothiazole sulfenamide (accelerator), 1kg of tetramethyl thiuram disulfide (accelerator), 3kg of polyethylene glycol (neutralizer), 1kg of vinyltriethoxysilane (coupling agent), 50kg of carbon black (filler) and 20kg of paraffin oil (plasticizer);
the preparation method of the oil-resistant and high-temperature-resistant damping rubber comprises the following steps,
rubber mixing: carrying out first mixing on chlorinated butyl rubber on an open mill, wherein the roll spacing is 3mm, the rotation speed ratio is 1:1.1, and the temperature is 50 ℃; after the roll is wrapped uniformly, adding nitrile rubber for secondary mixing for 5 min; then adding zinc oxide, stearic acid, N-cyclyl-2-benzothiazole sulfonamide, tetramethyl thiuram disulfide, polyethylene glycol, vinyl triethoxysilane, 50% carbon black and 50% paraffin oil, and mixing for 5min at a roller spacing of 4 mm; then adding the rest carbon black and paraffin oil and mixing for 4 min; after adding sulfur, uniformly mixing at a roll spacing of 4.5mm to obtain a rubber material;
injection molding and vulcanization: adding the rubber material into a machine barrel of an injection molding machine, heating to 150 ℃, pushing the rubber material to inject rubber through a piston, keeping the rubber material at 150 ℃ and 10MPa for 15min after the rubber material enters a mold cavity, and demolding after vulcanization is finished to obtain the oil-resistant and high-temperature-resistant damping rubber.
The present embodiment also provides a vibration isolation apparatus, comprising,
the vibration isolator 2 comprises a first vibration isolator 2-1, a second vibration isolator 2-2 and a third vibration isolator 2-3, wherein the first vibration isolator, the second vibration isolator and the third vibration isolator are made of the oil-resistant high-temperature-resistant damping rubber; the first vibration isolation piece is arranged at the top end of the vibration isolator, the third vibration isolation piece is arranged at the bottom end of the vibration isolator, and the second vibration isolation piece is arranged in the middle of the first vibration isolation piece and the third vibration isolation piece; the first vibration isolation piece is in a circular truncated cone shape, the diameter of the upper bottom surface of the circular truncated cone shape is 3cm, the diameter of the lower bottom surface of the circular truncated cone shape is 5cm, and the height of the circular truncated cone shape is 1 cm; the second vibration isolation piece is cylindrical, the diameter of the cylinder is 4cm, and the height of the cylinder is 2 cm; the third vibration isolation part is a cube, the side length is 10cm, the thickness is 3mm, and supporting force is provided for the vibration isolator; when the rubber is prepared, the rubber is integrally molded according to the shape and size requirements of the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece;
four springs 3, each spring having a composition comprising 0.1 wt% C, 0.5 wt% Si, 17 wt% Mn, 19 wt% Cr, 0.5 wt% Al, 0.1 wt% Ni, 3 wt% Ti, 5 wt% Mg, 0.2 wt% P, 0.01 wt% S and 54.59 wt% Fe; the dynamic stiffness of the spring is 1000N/mm, and the damping coefficient is 0.05; the 4 springs are respectively connected with a third vibration isolating piece bolt 4;
the protective shell is positioned at the top end of the vibration isolation device and is made of epoxy resin with the thermal grade of more than F grade; the protective housing covers the surface at first isolator, and protective housing and spring bolted connection are connected through spring and third vibration isolation piece, and the spring is located the edge of protective housing, and equidistant setting.
Example 2
The embodiment provides oil-resistant and high-temperature-resistant damping rubber, which comprises the following raw materials of 100kg of nitrile rubber, 30kg of chlorinated butyl rubber, 4kg of benzoyl peroxide (vulcanizing agent), 10kg of zinc oxide (active agent), 5kg of N-cyclyl-2-benzothiazole sulfonamide (accelerator), 3kg of tetramethyl thiuram disulfide (short for TMTD accelerator), 6kg of polyethylene glycol (neutralizer), 4kg of vinyltriethoxysilane (coupling agent), 70kg of white carbon black (filler) and 50kg of phthalate (plasticizer);
the preparation method of the oil-resistant and high-temperature-resistant damping rubber comprises the following steps,
rubber mixing: carrying out first mixing on chlorinated butyl rubber on an open mill, wherein the roll spacing is 3mm, the rotation speed ratio is 1:1.1, and the temperature is 50 ℃; after the roll is wrapped uniformly, adding nitrile rubber for secondary mixing for 5 min; then adding zinc oxide, N-cyclyl-2-benzothiazole sulfonamide, tetramethyl thiuram disulfide, polyethylene glycol, vinyl triethoxysilane, 50% white carbon black and 50% phthalate, and mixing for 5min at a roll spacing of 4 mm; then adding the rest carbon black and paraffin oil and mixing for 4 min; after adding benzoyl peroxide, uniformly mixing at a roll spacing of 4.5mm to obtain a rubber material;
injection molding and vulcanization: adding the rubber material into a machine barrel of an injection molding machine, heating to 150 ℃, pushing the rubber material to inject rubber through a piston, keeping the rubber material at 150 ℃ and 10MPa for 15min after the rubber material enters a mold cavity, and demolding after vulcanization is finished to obtain the oil-resistant and high-temperature-resistant damping rubber.
The present embodiment also provides a vibration isolation apparatus, comprising,
the vibration isolator 2 comprises a first vibration isolator 2-1, a second vibration isolator 2-2 and a third vibration isolator 2-3, wherein the first vibration isolator, the second vibration isolator and the third vibration isolator are made of the oil-resistant high-temperature-resistant damping rubber; the first vibration isolation piece is arranged at the top end of the vibration isolator, the third vibration isolation piece is arranged at the bottom end of the vibration isolator, and the second vibration isolation piece is arranged in the middle of the first vibration isolation piece and the third vibration isolation piece; the first vibration isolation piece is in a circular truncated cone shape, the diameter of the upper bottom surface of the circular truncated cone shape is 5cm, the diameter of the lower bottom surface of the circular truncated cone shape is 7cm, and the height of the circular truncated cone shape is 3 cm; the second vibration isolation piece is cylindrical, the diameter of the cylinder is 5cm, and the height of the cylinder is 3 cm; the third vibration isolation part is a cube, the side length is 10cm, the thickness is 3mm, and supporting force is provided for the vibration isolator; when the rubber is prepared, the rubber is integrally molded according to the shape and size requirements of the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece;
four springs 3, each spring having a composition comprising 0.4 wt% C, 0.6 wt% Si, 20 wt% Mn, 19 wt% Cr, 0.7 wt% Al, 0.3 wt% Ni, 5.5 wt% Ti, 5 wt% Mg, 0.2 wt% P, 0.01 wt% S and 48.29 wt% Fe; the dynamic stiffness of the spring is 5000N/mm, and the damping coefficient is 0.12; the 4 springs are respectively connected with a third vibration isolating piece bolt 4;
the protective shell is positioned at the top end of the vibration isolation device and is made of epoxy resin with the thermal grade of more than F grade; the protective housing covers the surface at first isolator, and protective housing and spring bolted connection are connected through spring and third vibration isolation piece, and the spring is located the edge of protective housing, and equidistant setting.
Example 3
The embodiment provides an oil-resistant and high-temperature-resistant damping rubber, which comprises the following raw materials of 90kg of nitrile rubber, 25kg of chlorinated butyl rubber, 3kg of sulfur (vulcanizing agent), 7kg of stearic acid (active agent), 5kg of TMTD (accelerator), 4kg of dimethylethanolamine (neutralizer), 3kg of vinyltriethoxysilane (coupling agent), 60kg of carbon black (filler) and 40kg of phthalate (plasticizer);
the preparation method of the oil-resistant and high-temperature-resistant damping rubber comprises the following steps,
rubber mixing: carrying out first mixing on chlorinated butyl rubber on an open mill, wherein the roll spacing is 3mm, the rotation speed ratio is 1:1.1, and the temperature is 50 ℃; after the roll is wrapped uniformly, adding nitrile rubber for secondary mixing for 5 min; then adding stearic acid, TMTD, dimethyl ethanolamine, vinyl triethoxysilane, 50% carbon black and 50% phthalate, and mixing for 5min at a roll spacing of 4 mm; then adding the rest carbon black and phthalate for mixing for 4 min; after adding sulfur, uniformly mixing at a roll spacing of 4.5mm to obtain a rubber material;
injection molding and vulcanization: adding the rubber material into a machine barrel of an injection molding machine, heating to 150 ℃, pushing the rubber material to inject rubber through a piston, keeping the rubber material at 150 ℃ and 10MPa for 15min after the rubber material enters a mold cavity, and demolding after vulcanization is finished to obtain the oil-resistant and high-temperature-resistant damping rubber.
The present embodiment also provides a vibration isolation apparatus, comprising,
the vibration isolator 2 comprises a first vibration isolator 2-1, a second vibration isolator 2-2 and a third vibration isolator 2-3, wherein the first vibration isolator, the second vibration isolator and the third vibration isolator are made of the oil-resistant high-temperature-resistant damping rubber; the first vibration isolation piece is arranged at the top end of the vibration isolator, the third vibration isolation piece is arranged at the bottom end of the vibration isolator, and the second vibration isolation piece is arranged in the middle of the first vibration isolation piece and the third vibration isolation piece; the first vibration isolation piece is in a circular truncated cone shape, the diameter of the upper bottom surface of the circular truncated cone shape is 4cm, the diameter of the lower bottom surface of the circular truncated cone shape is 6cm, and the height of the circular truncated cone shape is 2.5 cm; the second vibration isolation piece is cylindrical, the diameter of the cylinder is 5cm, and the height of the cylinder is 4 cm; the third vibration isolation part is a cube, the side length is 10cm, the thickness is 3mm, and supporting force is provided for the vibration isolator; when the rubber is prepared, the rubber is integrally molded according to the shape and size requirements of the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece;
four springs 3, each spring having a composition comprising 0.3 wt% C, 0.3 wt% Si, 16 wt% Mn, 17 wt% Cr, 0.5 wt% Al, 0.1 wt% Ni, 2.0 wt% Ti, 3 wt% Mg, 0.2 wt% P, 0.01 wt% S and 60.59 wt% Fe; the dynamic stiffness of the spring is 3500N/mm, and the damping coefficient is 0.11; the four springs are respectively connected with a third vibration isolating piece bolt 4;
the protective shell is positioned at the top end of the vibration isolation device and is in a round table shape, and the protective shell is made of epoxy resin with the thermal grade of more than F grade; the protective housing covers on first isolator surface, and protective housing and spring bolted connection are connected through spring and third vibration isolation piece, and the spring is located the edge of protective housing, and equidistant setting.
Example 4
The embodiment provides an oil-resistant and high-temperature-resistant damping rubber, which comprises 80kg of nitrile rubber, 10kg of chlorinated butyl rubber, 1kg of sulfur (vulcanizing agent), 2kg of zinc oxide (active agent), 3kg of stearic acid (active agent), 1kg of N-cyclyl-2-benzothiazole sulfenamide (accelerator), 1kg of tetramethyl thiuram disulfide (accelerator), 3kg of polyethylene glycol (neutralizer), 1kg of vinyltriethoxysilane (coupling agent), 50kg of carbon black (filler) and 20kg of paraffin oil (plasticizer);
the preparation method of the oil-resistant and high-temperature-resistant damping rubber comprises the following steps,
rubber mixing: carrying out first mixing on chlorinated butyl rubber on an open mill, wherein the roll spacing is 3mm, the rotation speed ratio is 1:1.1, and the temperature is 50 ℃; after the roll is wrapped uniformly, adding nitrile rubber for secondary mixing for 5 min; then adding zinc oxide, stearic acid, N-cyclyl-2-benzothiazole sulfonamide, tetramethyl thiuram disulfide, polyethylene glycol, vinyl triethoxysilane, 50% carbon black and 50% paraffin oil, and mixing for 5min at a roller spacing of 4 mm; then adding the rest carbon black and paraffin oil and mixing for 4 min; after adding sulfur, uniformly mixing at a roll spacing of 4.5mm to obtain a rubber material;
injection molding and vulcanization: adding the rubber material into a machine barrel of an injection molding machine, heating to 150 ℃, pushing the rubber material to inject rubber through a piston, keeping the rubber material at 150 ℃ and 10MPa for 15min after the rubber material enters a mold cavity, and demolding after vulcanization is finished to obtain the oil-resistant and high-temperature-resistant damping rubber.
The present embodiment also provides a vibration isolation apparatus, comprising,
the vibration isolator comprises a first vibration isolator, a second vibration isolator and a third vibration isolator, wherein the first vibration isolator, the second vibration isolator and the third vibration isolator are made of the oil-resistant high-temperature-resistant damping rubber; the first vibration isolation piece is arranged at the top end of the vibration isolator, the third vibration isolation piece is arranged at the bottom end of the vibration isolator, and the second vibration isolation piece is arranged in the middle of the first vibration isolation piece and the third vibration isolation piece; the first vibration isolation piece is in a shape of a circular truncated cone, the diameter of the upper bottom surface of the circular truncated cone is 3cm, the diameter of the lower bottom surface of the circular truncated cone is 5cm, and the height of the circular truncated cone is 1 cm; the second vibration isolation piece is cylindrical, the diameter of the cylinder is 4cm, and the height of the cylinder is 2 cm; the third vibration isolation part is a cube, the side length is 10cm, the thickness is 3mm, and supporting force is provided for the vibration isolator; when the rubber is prepared, the rubber is integrally molded according to the shape and size requirements of the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece;
the four springs are respectively connected with the third vibration isolating piece through bolts; the spring used in the embodiment is of the type
The manufacturer is Dongguan xie metal product Co.Ltd;
the protective shell is positioned at the top end of the vibration isolation device and is made of epoxy resin with the thermal grade of more than F grade; the protective housing covers on first isolator surface, and protective housing and spring bolted connection are connected through spring and third vibration isolation piece, and the spring is located the edge of protective housing, and equidistant setting.
Comparative example 1
The comparative example provides damping rubber, the raw materials of which comprise 80kg of nitrile rubber, 10kg of polyvinyl chloride, 1kg of sulfur (vulcanizing agent), 2kg of zinc oxide (active agent), 3kg of stearic acid (active agent), 1kg of N-cyclyl-2-benzothiazole sulfonamide (accelerator), 1kg of tetramethyl thiuram disulfide (accelerator), 3kg of polyethylene glycol (neutralizer), 1kg of vinyl triethoxysilane (coupling agent), 50kg of carbon black (filler) and 20kg of paraffin oil (plasticizer);
the preparation method of the damping rubber comprises the following steps,
rubber mixing: carrying out first mixing on nitrile rubber on an open mill, wherein the roll spacing is 3mm, the rotation speed ratio is 1:1.1, and the temperature is 50 ℃; after the roll wrapping is uniform, adding polyvinyl chloride for secondary mixing for 5 min; then adding zinc oxide, stearic acid, N-cyclyl-2-benzothiazole sulfonamide, tetramethyl thiuram disulfide, polyethylene glycol, vinyl triethoxysilane, 50% carbon black and 50% paraffin oil, and mixing for 5min at a roller spacing of 4 mm; then adding the rest carbon black and paraffin oil and mixing for 4 min; after adding sulfur, uniformly mixing at a roll spacing of 4.5mm to obtain a rubber material;
injection molding and vulcanization: adding the rubber material into a machine barrel of an injection molding machine, heating to 150 ℃, pushing the rubber material to inject rubber through a piston, keeping the rubber material at 150 ℃ and 10MPa for 15min after the rubber material enters a mold cavity, and demolding after vulcanization is finished to obtain the damping rubber.
The present comparative example also provides a vibration isolation apparatus, comprising,
the vibration isolator 2 comprises a first vibration isolator 2-1, a second vibration isolator 2-2 and a third vibration isolator 2-3, wherein the first vibration isolator, the second vibration isolator and the third vibration isolator are made of the damping rubber; the first vibration isolation piece is arranged at the top end of the vibration isolator, the third vibration isolation piece is arranged at the bottom end of the vibration isolator, and the second vibration isolation piece is arranged in the middle of the first vibration isolation piece and the third vibration isolation piece; the first vibration isolation piece is in a circular truncated cone shape, the diameter of the upper bottom surface of the circular truncated cone shape is 3cm, the diameter of the lower bottom surface of the circular truncated cone shape is 5cm, and the height of the circular truncated cone shape is 1 cm; the second vibration isolation piece is cylindrical, the diameter of the cylinder is 4cm, and the height of the cylinder is 2 cm; the third vibration isolation part is a cube, the side length is 10cm, the thickness is 3mm, and supporting force is provided for the vibration isolator; when the rubber is prepared, the rubber is integrally molded according to the shape and size requirements of the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece;
four springs, each spring having a composition comprising 0.1 wt% C, 0.5 wt% Si, 17 wt% Mn, 19 wt% Cr, 0.5 wt% Al, 0.1 wt% Ni, 3 wt% Ti, 5 wt% Mg, 0.2 wt% P, 0.01 wt% S and 54.59 wt% Fe; the dynamic stiffness of the spring is 1000N/mm, and the damping coefficient is 0.05; the 4 springs are respectively connected with the third vibration isolating piece through bolts;
the protective shell is positioned at the top end of the vibration isolation device and is made of epoxy resin with the thermal grade of more than F grade; the protective housing covers on first isolator surface, and protective housing and spring bolted connection are connected through spring and third vibration isolation piece, and the spring is located the edge of protective housing, and equidistant setting.
Comparative example 2
The present comparative example provides a damping rubber, the raw materials of which include 10kg of butyl rubber, 1kg of sulfur (vulcanizing agent), 2kg of zinc oxide (active agent), 3kg of stearic acid (active agent), 1kg of N-cyclyl-2-benzothiazole sulfenamide (accelerator), 1kg of tetramethylthiuram disulfide (accelerator), 3kg of polyethylene glycol (neutralizer), 1kg of vinyltriethoxysilane (coupling agent), 50kg of carbon black (filler), 20kg of paraffin oil (plasticizer);
the preparation method of the damping rubber comprises the following steps,
rubber mixing: carrying out first mixing on butyl rubber on an open mill, wherein the roll spacing is 3mm, the rotation speed ratio is 1:1.1, and the temperature is 50 ℃; after the roller is wrapped uniformly, adding zinc oxide, stearic acid, N-cyclyl-2-benzothiazole sulfonamide, tetramethyl thiuram disulfide, polyethylene glycol, vinyl triethoxysilane, 50% carbon black and 50% paraffin oil, and mixing for 5min at a roller spacing of 4 mm; then adding the rest carbon black and paraffin oil and mixing for 4 min; after adding sulfur, uniformly mixing at a roll spacing of 4.5mm to obtain a rubber material;
injection molding and vulcanization: adding the rubber material into a machine barrel of an injection molding machine, heating to 150 ℃, pushing the rubber material to inject rubber through a piston, keeping the rubber material at 150 ℃ and 10MPa for 15min after the rubber material enters a mold cavity, and demolding after vulcanization is finished to obtain the damping rubber.
The present comparative example also provides a vibration isolation apparatus, comprising,
the vibration isolator 2 comprises a first vibration isolator 2-1, a second vibration isolator 2-2 and a third vibration isolator 2-3, wherein the first vibration isolator, the second vibration isolator and the third vibration isolator are made of the damping rubber; the first vibration isolation piece is arranged at the top end of the vibration isolator, the third vibration isolation piece is arranged at the bottom end of the vibration isolator, and the second vibration isolation piece is arranged in the middle of the first vibration isolation piece and the third vibration isolation piece; the first vibration isolation piece is in a circular truncated cone shape, the diameter of the upper bottom surface of the circular truncated cone shape is 3cm, the diameter of the lower bottom surface of the circular truncated cone shape is 5cm, and the height of the circular truncated cone shape is 1 cm; the second vibration isolation piece is cylindrical, the diameter of the cylinder is 4cm, and the height of the cylinder is 2 cm; the third vibration isolation part is a cube, the side length is 10cm, the thickness is 3mm, and supporting force is provided for the vibration isolator; when the rubber is prepared, the rubber is integrally molded according to the shape and size requirements of the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece;
four springs, each spring having a composition comprising 0.1 wt% C, 0.5 wt% Si, 17 wt% Mn, 19 wt% Cr, 0.5 wt% Al, 0.1 wt% Ni, 3 wt% Ti, 5 wt% Mg, 0.2 wt% P, 0.01 wt% S and 54.59 wt% Fe; the dynamic stiffness of the spring is 1000N/mm, and the damping coefficient is 0.05; the 4 springs are respectively connected with the third vibration isolating piece through bolts;
the protective shell is positioned at the top end of the vibration isolation device and is made of epoxy resin with the thermal grade of more than F grade; the protective housing covers on first isolator surface, and protective housing and spring bolted connection are connected through spring and third vibration isolation piece, and the spring is located the edge of protective housing, and equidistant setting.
Comparative example 3
The comparative example provides oil-resistant high-temperature-resistant damping rubber, and the raw materials of the oil-resistant high-temperature-resistant damping rubber comprise 80kg of nitrile rubber, 10kg of butyl rubber, 1kg of sulfur (vulcanizing agent), 2kg of zinc oxide (active agent), 3kg of stearic acid (active agent), 1kg of N-cyclyl-2-benzothiazole sulfenamide (accelerator), 1kg of tetramethyl thiuram disulfide (accelerator), 3kg of polyethylene glycol (neutralizer), 1kg of vinyl triethoxysilane (coupling agent), 50kg of carbon black (filler) and 20kg of paraffin oil (plasticizer);
the preparation method of the oil-resistant and high-temperature-resistant damping rubber comprises the following steps,
rubber mixing: carrying out first mixing on butyl rubber on an open mill, wherein the roll spacing is 3mm, the rotation speed ratio is 1:1.1, and the temperature is 50 ℃; after the roll is wrapped uniformly, adding nitrile rubber for secondary mixing for 5 min; then adding zinc oxide, stearic acid, N-cyclyl-2-benzothiazole sulfonamide, tetramethyl thiuram disulfide, polyethylene glycol, vinyl triethoxysilane, 50% carbon black and 50% paraffin oil, and mixing for 5min at a roller spacing of 4 mm; then adding the rest carbon black and paraffin oil and mixing for 4 min; after adding sulfur, uniformly mixing at a roll spacing of 4.5mm to obtain a rubber material;
injection molding and vulcanization: adding the rubber material into a machine barrel of an injection molding machine, heating to 150 ℃, pushing the rubber material to inject rubber through a piston, keeping the rubber material at 150 ℃ and 10MPa for 15min after the rubber material enters a mold cavity, and demolding after vulcanization is finished to obtain the oil-resistant and high-temperature-resistant damping rubber.
The present comparative example also provides a vibration isolation apparatus, comprising,
the vibration isolator 2 comprises a first vibration isolator 2-1, a second vibration isolator 2-2 and a third vibration isolator 2-3, wherein the first vibration isolator, the second vibration isolator and the third vibration isolator are made of the oil-resistant high-temperature-resistant damping rubber; the first vibration isolation piece is arranged at the top end of the vibration isolator, the third vibration isolation piece is arranged at the bottom end of the vibration isolator, and the second vibration isolation piece is arranged in the middle of the first vibration isolation piece and the third vibration isolation piece; the first vibration isolation piece is a cuboid, the length of the cuboid is 5cm, the width of the cuboid is 3cm, and the height of the cuboid is 1 cm; the second vibration isolation piece is cylindrical, the diameter of the cylinder is 4cm, and the height of the cylinder is 2 cm; the third vibration isolation piece is a cube, the side length is 10cm, and the thickness is 3 mm; when the rubber is prepared, the rubber is integrally molded according to the shape and size requirements of the first vibration isolating piece, the second vibration isolating piece and the third vibration isolating piece;
four springs, each spring having a composition comprising 0.1 wt% C, 0.5 wt% Si, 17 wt% Mn, 19 wt% Cr, 0.5 wt% Al, 0.1 wt% Ni, 3 wt% Ti, 5 wt% Mg, 0.2 wt% P, 0.01 wt% S and 54.59 wt% Fe; the dynamic stiffness of the spring is 1000N/mm, and the damping coefficient is 0.05; the 4 springs are respectively connected with the third vibration isolating piece through bolts;
the protective shell is positioned at the top end of the vibration isolation device and is made of epoxy resin with the thermal grade of more than F grade; the protective housing covers on first isolator surface, and protective housing and spring bolted connection are connected through spring and third vibration isolation piece, and the spring is located the edge of protective housing, and equidistant setting.
Test examples
The experimental example provides the application of the vibration isolation devices provided in examples 1 to 4 and comparative examples 1 to 3 in noise reduction and vibration reduction of transformers and reactors, and specifically comprises the following steps:
the vibration isolation device is fixedly connected in an oil tank in the reactor through bolts, and the mass change rate, the load, the damping ratio and the vibration isolation efficiency of the vibration isolation device are tested;
the method for testing the mass change rate of the vibration isolation device comprises the following steps: dipping the rubber in insulating oil at 90 ℃ for a period shown in Table 1, weighing the mass of the rubber before and after dipping, calculating the mass change rate shown in formula I,
wherein ω is the rate of change of mass of the rubber; m is1Is the mass of the rubber before immersion in insulating oil, m2Is the mass of the rubber after immersion in the insulating oil.
The test method of the load, the damping ratio and the vibration isolation efficiency of the vibration isolation device refers to JBJ 22-1991 vibration isolation design specifications.
TABLE 1 test results of vibration isolation device
As can be seen from Table 1, the rubber provided by the invention has better damping and vibration isolation effects in three-dimensional directions (X direction, Y direction and Z direction), and the rubber has smaller mass change rate, which indicates that the rubber can be used in insulating oil for a long time; meanwhile, the rubber provided by the invention bears a large load.
Compared with the comparative example 3, the embodiment 1 shows that the structure of the vibration isolation device provided by the invention has better damping and vibration isolation effects.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (11)
1. The oil-resistant and high-temperature-resistant damping rubber is characterized by comprising, by weight, 80-100 parts of nitrile rubber, 10-30 parts of chlorinated butyl rubber, 50-70 parts of filler and 32-82 parts of an auxiliary agent.
2. The oil-resistant and high-temperature-resistant damping rubber as claimed in claim 1, wherein the auxiliary comprises 1-4 parts of vulcanizing agent, 5-10 parts of activating agent, 2-8 parts of accelerator, 3-6 parts of neutralizer, 1-4 parts of coupling agent and 20-50 parts of plasticizer.
3. The oil-resistant and high-temperature-resistant damping rubber as claimed in claim 1 or 2, wherein the filler is carbon black or white carbon black.
4. The oil-resistant and high-temperature-resistant damping rubber according to claim 2, wherein the vulcanizing agent is sulfur or benzoyl peroxide;
the active agent is zinc oxide and/or stearic acid;
the accelerator is at least one of sulfenamide accelerator, thiomethyl accelerator, aldehyde amine accelerator and thiazole accelerator;
the neutralizing agent is polyethylene glycol or dimethylethanolamine;
the coupling agent is vinyl triethoxysilane or vinyl trimethoxysilane;
the plasticizer is paraffin oil, phthalate or terephthalate.
5. A method for preparing the oil-resistant and high temperature-resistant damping rubber according to any one of claims 1 to 4, which comprises the following steps,
adding nitrile rubber into chlorinated butyl rubber after primary mixing for secondary mixing;
adding an auxiliary agent for third mixing to obtain a rubber material;
and the rubber material is molded and vulcanized to obtain the oil-resistant and high-temperature-resistant damping rubber.
6. The preparation method according to claim 5, wherein the specific operation step of adding the auxiliary agent for third mixing to obtain the rubber compound comprises,
adding an active agent, an accelerator, a neutralizer, a coupling agent, a part of filler and a part of plasticizer, and then carrying out fourth mixing;
adding the rest plasticizer and the filler for fifth mixing;
and finally, adding a vulcanizing agent and then carrying out sixth mixing to obtain the rubber material.
7. A vibration isolation device is characterized by comprising,
the vibration isolator comprises a first vibration isolating part, a second vibration isolating part and a third vibration isolating part which are sequentially connected; the first vibration isolating part, the second vibration isolating part and the third vibration isolating part are made of the oil-resistant and high-temperature-resistant damping rubber according to any one of claims 1 to 4 or the oil-resistant and high-temperature-resistant damping rubber prepared by the preparation method according to any one of claims 5 to 6;
at least one support member bolted to the third vibration isolator.
8. The vibration isolation device according to claim 7, wherein the first vibration isolation member is a truncated cone, the ratio of the diameter of the upper bottom surface to the diameter of the lower bottom surface of the truncated cone is 1 (1.5-2), and the ratio of the diameter of the height of the truncated cone to the diameter of the upper bottom surface is (1-3): 3-5);
the second vibration isolating piece is cylindrical, and the ratio of the diameter to the height of the cylinder is 1 (2-2.5);
the first vibration isolator is arranged at the top end of the vibration isolator, the third vibration isolator is arranged at the bottom end of the vibration isolator, and the second vibration isolator is arranged between the first vibration isolator and the second vibration isolator.
9. The vibration isolation device according to claim 7 or 8, wherein the dynamic stiffness of the support member is 1000-5000N/mm, and the damping coefficient is 0.05-0.12;
the supporting piece is a spring, and the components of the spring comprise 0.1-0.4 wt% of C, 0.3-0.6 wt% of Mn, 17-19 wt% of Cr, 0.5-0.7 wt% of Al, 0.1-0.3 wt% of Ni, 2-5.5 wt% of Ti and 3-5 wt% of Mg;
the composition of the spring further comprises not more than 0.2 wt% P and not more than 0.01 wt% S;
the composition of the spring also includes Fe.
10. The vibration isolation device according to any one of claims 7 to 9, further comprising,
the protective shell is positioned at the top end of the vibration isolation device, is connected with the third vibration isolation piece through a support piece and covers the outer surface of the first vibration isolation piece; the protective shell is made of epoxy resin.
11. Use of a vibration isolation device according to any of claims 7-10 for vibration damping and noise reduction in transformers and/or reactors.
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| CN113563650A (en) * | 2021-08-25 | 2021-10-29 | 全球能源互联网研究院有限公司 | Oil-immersed acoustic vibration suppression damping rubber and preparation method thereof |
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