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Preparation method of sealing element for hydraulic system

A technology for hydraulic systems and seals, which is applied in the field of preparation of seals for hydraulic systems, can solve problems such as failure to be clearly identified, storage of seals, improper maintenance, and excessive initial compression of seals. Effects of aging reaction progress, low airtightness, low aging resistance

Inactive Publication Date: 2020-12-22
嘉兴市轩禾园艺技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the working environment is polluted by the working medium, the temperature of the medium is too high during work, the sealing ring is damaged, the initial compression rate of the sealing ring is too large or too small, the sealing gap is too large, and the storage and maintenance of the sealing ring are improper, etc., all of which are likely to cause seal failure
However, due to the sealing characteristics of the hydraulic transmission device, the failure cannot be clearly found out, and there are many factors that cause the failure of the seal, and many factors are coupled with each other, which makes the diagnosis of the failure more difficult, the troubleshooting period is longer, the equipment use efficiency is reduced, and it costs a lot. Additional manpower and material resources

Method used

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  • Preparation method of sealing element for hydraulic system
  • Preparation method of sealing element for hydraulic system
  • Preparation method of sealing element for hydraulic system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. The synthetic method of modifying agent, synthetic route is:

[0043]

[0044] Take by weighing 4-aminodiphenylamine-2-sulfonic acid and butylene oxide in a molar ratio of 1:1.15, add dehydrated alcohol, and the consumption ratio of 4-aminodiphenylamine-2-sulfonic acid and dehydrated alcohol is 1g: 10mL, after stirring evenly, in N 2 Protected, reacted at 110°C for 6 hours, distilled off ethanol and unreacted butylene oxide under reduced pressure, and dried to obtain a modifier with a yield of 84.6%.

[0045] 1 H NMR (CDCl 3,600MHz)δ:7.41(2H,Ph-H),7.28(2H,Ph-H),6.97(H,Ph-H),6.49-6.83(3H,Ph-H),4.57(1H,CH), 4.10(2H,NH),3.84(1H,-OH),2.74(2H,CH 2 ),2.45(1H,CH),2.13(1H,-OH),1.91(2H,CH 2 ).ESI-MS m / z: 351.07 ([M+Na] + ); Anal.calcd for C 16 h 18 N 2 o 5 S: C, 54.85; H, 5.20; N, 8.02, O, 22.81, S, 9.14.

[0046] 2. A method for preparing seals for hydraulic systems, including:

[0047] S1: Prepare lignin into 12wt% lignin alkali solution with a pH of 12, then...

Embodiment 2

[0052] 1. The synthetic method of modifier,

[0053] Take by weighing 4-aminodiphenylamine-2-sulfonic acid and butylene oxide in a molar ratio of 1:1.2, add dehydrated alcohol, and the consumption ratio of 4-aminodiphenylamine-2-sulfonic acid and dehydrated alcohol is 1g: 11mL, after stirring evenly, in N 2 Protected, reacted at 115°C for 5 hours, distilled off ethanol and unreacted butylene oxide under reduced pressure, and dried to obtain a modifier with a yield of 83.7%.

[0054] 2. A method for preparing seals for hydraulic systems, including:

[0055] S1: Prepare lignin into 8wt% lignin alkali solution with a pH of 11, then slowly add lignin solution into diluted nitrile latex, stir well, flocculate with 4% dilute hydrochloric acid, and wash the flocculated gel Finally, air-dry at 70°C to constant weight to obtain composite glue;

[0056] S2: Mix the composite rubber and modifier in a 90°C internal mixer for 15 minutes, then add vulcanization aids and sulfur, and conti...

Embodiment 3

[0060] 1. The synthetic method of modifying agent is with embodiment 1.

[0061] 2. A method for preparing seals for hydraulic systems, including:

[0062] S1: Prepare lignin into 12wt% lignin alkali solution with a pH of 12, then slowly add the lignin solution into the diluted nitrile latex, stir well and flocculate with 5% dilute hydrochloric acid, and the flocculated gel is washed Finally, air-dry at 65°C to constant weight to obtain a composite glue;

[0063] S2: Mix the composite rubber and modifier in an internal mixer at 85°C for 10 minutes, then add vulcanization aids and sulfur, and continue mixing for 8 minutes to form a mixed rubber;

[0064] S3: Vulcanize the mixed rubber in a flat vulcanizing machine at a temperature of 152 °C and a pressure of 0.37 MPa for 45 minutes, trim the edges, and cool to room temperature to form a seal.

[0065] The trade mark of above-mentioned nitrile rubber is Perbunan 3945, and acrylonitrile content is 39wt%, Mooney viscosity is 45;...

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Abstract

The invention discloses a preparation method of a sealing element for a hydraulic system, and belongs to the technical field of hydraulic system sealing, wherein the preparation method comprises the steps: co-precipitating lignin and butyronitrile rubber latex to form composite rubber; mixing the composite rubber, a modifier, a vulcanizing aid and sulfur to form a rubber compound; and vulcanizingand molding the rubber compound to form the sealing element. The structural formula of the used modifier is shown in the specification. The modifier not only has a reinforcing effect on rubber, but also improves the oil resistance, aging resistance and high and low temperature applicability of butyronitrile rubber. Therefore, the sealing element with good physical property, chemical property and usability can be obtained by the preparation method, and the sealing element is not easy to age and long in service life.

Description

technical field [0001] The invention belongs to the technical field of hydraulic system sealing, and in particular relates to a preparation method of a sealing member for a hydraulic system. Background technique [0002] As the main transmission system of construction machinery and the stable transmission device of many non-construction machinery, the hydraulic system has many advantages that other transmission devices cannot match. For example: small size, light weight, under the same volume, hydraulic transmission can provide greater power; it can realize stepless speed change, and the range of speed regulation is also large. This speed regulation process can be completed during work; easy to change direction , without changing the direction of the motor, frequent reversing can be achieved; the working medium is oil, which can realize self-lubrication and long life cycle; the transmission system is easy to realize automation, and the hydraulic components have been serializ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/36C07D301/00C08L9/04C08L97/00C08K13/02C08K5/42C08K3/22C08K5/47C08K3/06C08K5/09
CPCC07D301/00C07D303/36C08K5/42C08K2003/2296C08K2201/014C08L9/04C08L2201/08C08L97/005C08K13/02C08K3/22C08K5/47C08K3/06C08K5/09
Inventor 不公告发明人
Owner 嘉兴市轩禾园艺技术有限公司
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