CN112594296B - High-performance permanent magnet bistable electromagnetic clutch - Google Patents
High-performance permanent magnet bistable electromagnetic clutch Download PDFInfo
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- CN112594296B CN112594296B CN202011521149.6A CN202011521149A CN112594296B CN 112594296 B CN112594296 B CN 112594296B CN 202011521149 A CN202011521149 A CN 202011521149A CN 112594296 B CN112594296 B CN 112594296B
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- heat dissipation
- electromagnetic clutch
- dust cover
- coating
- dissipation coating
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C09D161/14—Modified phenol-aldehyde condensates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
- F16D27/14—Details
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/28—Nitrogen-containing compounds
- C08K2003/282—Binary compounds of nitrogen with aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a high-performance permanent magnet bistable electromagnetic clutch, which relates to the technical field of electromagnetic clutches and comprises a dust cover and an electromagnetic clutch arranged in the dust cover, wherein a heat dissipation coating is arranged on the surface of the dust cover, and the heat dissipation coating is formed by performing electrostatic spraying on heat dissipation coating. The heat dissipation coating prepared by the invention belongs to powder coating, does not contain organic solvent, is easy to store and is convenient to spray; the heat dissipation coating is simple in components, and the processing cost is reduced while the batching workload is reduced; the aluminum nitride is used as a heat conduction component of the heat dissipation coating, the heat dissipation effect of the dust cover is guaranteed by utilizing the characteristic of high heat conductivity of the aluminum nitride, the dust cover can not influence the heat dissipation of the electromagnetic clutch when realizing the dustproof effect on the electromagnetic clutch, and the normal work of the electromagnetic clutch is guaranteed.
Description
The technical field is as follows:
the invention relates to the technical field of electromagnetic clutches, in particular to a high-performance permanent magnet bistable electromagnetic clutch.
Background art:
the electromagnetic clutch is an electromagnetic mechanical connector which uses the electromagnetic induction principle and the friction force between inner and outer friction plates to make two parts in mechanical transmission system rotate, and under the condition that the driving part does not stop rotating, the driven part can be combined with or separated from the driving part, so that it is an automatic executing electric appliance. The electromagnetic clutch can be used for controlling the starting, reversing, speed regulating, braking and the like of machinery. It has simple structure, fast action, small control energy and convenient remote control; the volume is small, and larger torque can be transmitted; when used for brake control, the electromagnetic clutch has the advantages of rapid and smooth braking, so the electromagnetic clutch is widely applied to various processing machines and mechanical transmission systems.
When the electromagnetic clutch is applied to an environment with more dust, the dust can enter the inside of clutch parts, and potential safety hazards exist after long-time accumulation. If set up the dust cover to electromagnetic clutch, there is the radiating problem of influence clutch again. In view of this problem, prior patent CN201710244344.0 discloses a heat dissipation dustproof electromagnetic clutch, which can prevent dust and ensure heat dissipation effect at the same time by providing a heat dissipation dustproof cover including a heat dissipation portion and a dustproof portion. This patent is through mechanical structure's setting make heat dissipation dust cover plays the dustproof effect of heat dissipation, but too complicated structure can increase electromagnetic clutch's processing cost to also can influence electromagnetic clutch's dismantlement maintenance efficiency.
The invention content is as follows:
the technical problem to be solved by the invention is to provide a high-performance permanent magnet bistable electromagnetic clutch, which ensures the heat dissipation effect of a dust cover through the arrangement of a heat dissipation coating on the dust cover, simplifies the structure of the dust cover, simplifies the processing procedure, reduces the processing cost, simultaneously can play a role in protecting the dust cover, and prolongs the application period of the dust cover.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
high performance permanent magnetism bistable state electromagnetic clutch, include the dust cover and establish the inside electromagnetic clutch of dust cover, the surface of dust cover is equipped with heat dissipation coating, and heat dissipation coating is formed through electrostatic spraying by heat dissipation coating, heat dissipation coating comprises the raw materials of following parts by mass:
20-50 parts of phenolic resin, 20-50 parts of aluminum nitride, 5-20 parts of modified silane coupling agent, 1-10 parts of nano calcium carbonate and 0.5-5 parts of heat stabilizer.
The heat dissipation coating can play the guard action to the dust cover on the one hand, prevents that the dust cover from seriously influencing its life because of ageing, corruption, friction scheduling problem, and on the other hand can minimize the formation of coating to the adverse effect of dust cover radiating effect.
The heat dissipation coating does not contain a diluent, so that the coating is not required to be cured by volatilizing an organic solvent or moisture, and the problem of environmental pollution caused by volatilization when the organic solvent is used as the diluent is also avoided. The electrostatic spraying mode has the characteristics of uniform coating, good appearance decoration effect of the coating and high utilization rate of the coating, and can save the coating.
The preparation method of the modified silane coupling agent comprises the following steps: adding 1, 6-hexamethylene diisocyanate and a catalyst into toluene, then dropwise adding gamma-aminoethyl aminopropyl trimethoxy silane, heating to 80-100 ℃ for reaction, and distilling to remove toluene to obtain the modified silane coupling agent.
The molar ratio of the 1, 6-hexamethylene diisocyanate to the gamma-aminoethyl aminopropyl trimethoxy silane is 1: 2-2.05.
The catalyst is at least one of dibutyltin dilaurate, bismuth isooctanoate, bismuth neodecanoate, bismuth naphthenate and bismuth laurate. The organic tin compound and the organic bismuth compound are used as catalysts to accelerate the reaction rate of amino and isocyanate groups, thereby improving the conversion rate of raw materials and the yield of products.
Gamma-aminoethyl aminopropyltrimethoxysilane, abbreviated as silane coupling agent KH-792. The silane coupling agent generally has a molecular formula of Y-R-Si (OR)3(wherein Y-organic functional group, SiOR-siloxy). The siloxy group is reactive with inorganic species and the organofunctional group is reactive or compatible with organic species. When a silane coupling agent is interposed between the inorganic and organic interfaces, a bonding layer of organic matrix-silane coupling agent-inorganic matrix may be formed. Therefore, silane coupling agents are often used for surface treatment of the inorganic filler to improve the compatibility between the inorganic filler and the resin, thereby improving the dispersibility and adhesion of the inorganic filler in the resin.
In the invention, the silane coupling agent KH-792 is not directly used as a dispersing agent, but is modified, so that the action performance of the silane coupling agent KH-792 is enhanced.
The reaction equation followed for the preparation of the above-described modified silane coupling agent:
the prepared modified silane coupling agent can be used as a dispersing agent to reduce the interfacial tension of aluminum nitride in phenolic resin, has good compatibility with the phenolic resin, and promotes the uniform blending of the aluminum nitride and the phenolic resin. Compared with the original gamma-aminoethyl aminopropyl trimethoxy silane, the prepared modified silane coupling agent can reduce the resistivity of the coating and make the coating more suitable for the operation mode of electrostatic spraying. Meanwhile, the prepared modified silane coupling agent has strong adhesiveness, can promote the efficient adhesion of coating components on a dust cover and improve the adhesive force of a coating, and further enhances the heat dissipation effect of the coating.
The aluminum nitride has high thermal conductivity, about 320W/m.K, is nontoxic and has higher use safety than beryllium oxide. The aluminum nitride is used as the heat conducting component of the coating, so that the heat dissipation effect of the coating can be ensured. And the aluminum nitride has high strength and good heat resistance, and can enhance the physical property and the thermal shock resistance of the coating.
The average grain diameter of the nano calcium carbonate is 20-50 nm. The nano calcium carbonate has large specific surface area and high surface activity, and can be used as a filler to reduce the dosage of phenolic resin and ensure the physical properties of a coating.
The heat stabilizer is zinc stearate and/or barium stearate. Zinc stearate and barium stearate belong to green environment-friendly heat stabilizers, and the heat stability of the coating can be improved.
Since aluminum nitride is a heat conductive material known in the art that has a high thermal conductivity and a moderate price, if another heat conductive material is replaced, the heat conductive effect substantially higher than that of aluminum nitride may not be obtained, and the cost is increased. However, based on the purpose of further optimizing the heat dissipation effect of the coating, the invention also provides a film-forming material, wherein the modified phenolic resin is used for replacing the adopted conventional phenolic resin in the field, and the preparation technical scheme of the modified phenolic resin is as follows:
the preparation method of the modified phenolic resin comprises the following steps: dissolving phenolic resin in dimethylformamide to obtain a solution I, dissolving isopropyl cyclohexanecarboxylic acid in dimethylformamide to obtain a solution II, simultaneously dropwise adding the solution II and concentrated sulfuric acid into the solution I, heating for reaction, continuing to react after dropwise adding is finished, cooling to room temperature, adding water, stirring, standing, performing suction filtration, drying, and crushing to obtain the modified phenolic resin.
The mass ratio of the phenolic resin to the isopropyl cyclohexyl formic acid is 50-100: 10-50.
Concentrated sulfuric acid is used as a catalyst, phenolic resin and isopropyl cyclohexyl formic acid are subjected to esterification reaction, and partial hydroxyl of the phenolic resin is converted into isopropyl cyclohexyl formate, so that the film-forming property of the phenolic resin is ensured, the adhesiveness of the phenolic resin is enhanced, the adhesion of heat-conducting components on a dust cover is improved, and the heat-dissipating effect of the coating is optimized.
The invention has the beneficial effects that:
(1) the heat dissipation coating prepared by the invention belongs to powder coating, does not contain organic solvent, is easy to store and is convenient to spray; and the heat dissipation coating has simple components, reduces the processing cost and simultaneously reduces the burden of burdening.
(2) According to the invention, the aluminum nitride is used as the heat conduction component of the heat dissipation coating, and the heat dissipation effect of the dust cover is ensured by utilizing the characteristic of high heat conductivity of the aluminum nitride, so that the dust cover can realize the dust prevention effect on the electromagnetic clutch, meanwhile, the heat dissipation of the electromagnetic clutch is not influenced, and the normal work of the electromagnetic clutch is ensured.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The phenolic resins in the following examples and comparative examples were obtained from 2123 phenolic resin from Minyo Binder Co., Ltd.
The aluminum nitride in the following examples and comparative examples was purchased from zheng hou shoji chemical products ltd.
The nano calcium carbonate in the following examples and comparative examples was purchased from Zhejiang celestite nanotechnology Co., Ltd and had an average particle diameter of 20 nm.
The modified silane coupling agents in the following examples and comparative examples were prepared by the following steps: adding 16.8g of 1, 6-hexamethylene diisocyanate and 0.005mol of bismuth laurate into 500mL of toluene, then dropwise adding 53g of gamma-aminoethyl aminopropyltrimethoxysilane, heating to 100 ℃ for reaction for 5h, and distilling to remove the toluene to obtain the modified silane coupling agent.1H NMR(DMSO-d6,400MHz),δ:6.02(s,4H),3.83(q,12H),3.48(m,4H),3.04(t,4H),2.66-2.52(m,8H),1.51(s,2H),1.42-1.37(m,12H),1.21(t,18H),0.56(m,4H).ESI-MS:m/z＝697.46[M+1]+.
The modified phenolic resins in the following examples and comparative examples were prepared using the following procedure: dissolving 62g of phenolic resin in dimethylformamide to obtain a solution I, dissolving 34g of isopropyl cyclohexanecarboxylic acid in dimethylformamide to obtain a solution II, simultaneously dropwise adding the solution II and concentrated sulfuric acid into the solution I, heating to 80 ℃, preserving heat for reaction, continuing to react for 3h after dropwise adding is finished, cooling to room temperature, adding 200g of water, stirring, standing for 30min, performing suction filtration, drying and crushing to obtain the modified phenolic resin. Fourier transform infrared absorption spectrum data: at 3500cm-1Is a stretching vibration peak of-OH at 1720cm-1The stretching vibration peak of C ═ O at 1110cm-1、1180cm-1Is the stretching vibration peak of C-O-C, which shows that the phenolic resin and the isopropyl cyclohexyl formic acid have esterification reaction.
Example 1
The heat dissipation coating is prepared by mixing 22kg of phenolic resin, 35kg of aluminum nitride, 8kg of modified silane coupling agent, 5kg of nano calcium carbonate and 0.5kg of zinc stearate. And spraying the prepared heat dissipation coating on a dust cover by adopting an electrostatic spraying mode to form a heat dissipation coating with the thickness of 30 mu m, and taking the prepared dust cover with the heat dissipation effect as a protective cover of the electromagnetic clutch.
Example 2
The heat dissipation coating is prepared by mixing 25kg of phenolic resin, 38kg of aluminum nitride, 8kg of modified silane coupling agent, 5kg of nano calcium carbonate and 0.5kg of barium stearate. And spraying the prepared heat dissipation coating on a dust cover by adopting an electrostatic spraying mode to form a heat dissipation coating with the thickness of 30 mu m, and taking the prepared dust cover with the heat dissipation effect as a protective cover of the electromagnetic clutch.
Example 3
The heat dissipation coating is prepared by mixing 28kg of phenolic resin, 40kg of aluminum nitride, 10kg of modified silane coupling agent, 5kg of nano calcium carbonate and 0.8kg of zinc stearate. And spraying the prepared heat dissipation coating on a dust cover by adopting an electrostatic spraying mode to form a heat dissipation coating with the thickness of 30 mu m, and taking the prepared dust cover with the heat dissipation effect as a protective cover of the electromagnetic clutch.
Example 4
Example 4 was prepared by replacing the phenolic resin of example 3 with a modified phenolic resin, and the remaining steps were the same as in example 3.
The heat dissipation coating is prepared by mixing 28kg of modified phenolic resin, 40kg of aluminum nitride, 10kg of modified silane coupling agent, 5kg of nano calcium carbonate and 0.8kg of zinc stearate. And spraying the prepared heat dissipation coating on a dust cover by adopting an electrostatic spraying mode to form a heat dissipation coating with the thickness of 30 mu m, and taking the prepared dust cover with the heat dissipation effect as a protective cover of the electromagnetic clutch.
Comparative example
A comparative example was obtained by replacing the modified silane coupling agent in example 3 with the silane coupling agent KH-792, and the rest of the preparation procedure was the same as in example 3.
The heat dissipation coating is prepared by mixing 28kg of phenolic resin, 40kg of aluminum nitride, 10kg of silane coupling agent KH-792, 5kg of nano calcium carbonate and 0.8kg of zinc stearate. And spraying the prepared heat dissipation coating on a dust cover by adopting an electrostatic spraying mode to form a heat dissipation coating with the thickness of 30 mu m, and taking the prepared dust cover with the heat dissipation effect as a protective cover of the electromagnetic clutch.
The thermal conductivity of the heater protection tubes of the same specification prepared in the examples and comparative examples was measured by using a laser thermal conductivity meter LFA 427, and the results are shown in the following table.
TABLE 1
| Test items | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example |
| Thermal conductivity W/(m.K) | 230 | 238 | 242 | 257 | 213 |
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. High performance permanent magnetism bistable state electromagnetic clutch, its characterized in that: the electromagnetic clutch comprises a dust cover and an electromagnetic clutch arranged inside the dust cover, wherein a heat dissipation coating is arranged on the surface of the dust cover, the heat dissipation coating is formed by heat dissipation coating through electrostatic spraying, and the heat dissipation coating is composed of the following raw materials in parts by mass:
20-50 parts of phenolic resin, 20-50 parts of aluminum nitride, 5-20 parts of modified silane coupling agent, 1-10 parts of nano calcium carbonate and 0.5-5 parts of heat stabilizer;
the preparation method of the modified silane coupling agent comprises the following steps: adding 1, 6-hexamethylene diisocyanate and a catalyst into toluene, then dropwise adding gamma-aminoethyl aminopropyl trimethoxy silane, heating to 80-100 ℃ for reaction, and distilling to remove toluene to obtain a modified silane coupling agent;
the molar ratio of the 1, 6-hexamethylene diisocyanate to the gamma-aminoethyl aminopropyl trimethoxy silane is 1: 2-2.05.
2. The high performance permanent magnet bistable electromagnetic clutch of claim 1 wherein: the catalyst is at least one of dibutyltin dilaurate, bismuth isooctanoate, bismuth neodecanoate, bismuth naphthenate and bismuth laurate.
3. The high performance permanent magnet bistable electromagnetic clutch of claim 1 wherein: the average grain diameter of the nano calcium carbonate is 20-50 nm.
4. The high performance permanent magnet bistable electromagnetic clutch of claim 1 wherein: the heat stabilizer is zinc stearate and/or barium stearate.
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| JP3794525B2 (en) * | 1998-02-06 | 2006-07-05 | 信越化学工業株式会社 | Aluminum nitride composition |
| CN103589270A (en) * | 2013-10-12 | 2014-02-19 | 安徽自动化仪表有限公司 | Fireproof radiating paint used for meter housing and preparation method thereof |
| CN105273372A (en) * | 2015-11-18 | 2016-01-27 | 东莞市万江明冠实业有限公司 | Macromolecule heat conduction and dissipation blended composite material and automatic preparation method |
| CN105656236B (en) * | 2016-03-04 | 2019-01-15 | 金华极合环保技术咨询有限公司 | A kind of high-efficiency radiating power engine |
| CN106047039A (en) * | 2016-08-11 | 2016-10-26 | 安徽波浪岛游乐设备有限公司 | High temperature-resistant LED lamp heat dissipating coating and preparation method thereof |
| CN106750146A (en) * | 2016-12-27 | 2017-05-31 | 中蓝晨光化工研究设计院有限公司 | A kind of modified polyurethane resin and preparation method thereof |
| CN107987770B (en) * | 2017-12-28 | 2020-09-08 | 广东生益科技股份有限公司 | High-thermal-conductivity insulating adhesive composition and preparation method thereof |
| CN108574396A (en) * | 2018-07-26 | 2018-09-25 | 合肥研新离合器有限公司 | A kind of electromagnetism voltage stabilizing electromagnetic slip clutches |
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