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Ultra-large mud pump shaft L-shaped sealing element rubber

A mud pump and seal technology, which is applied in the field of L-shaped seals for super-large mud pump pump shafts, can solve the problems of harsh use environment, serious wear, waist fracture, etc., and achieve the effect of obvious effect and improved service life.

Active Publication Date: 2015-07-15
TIANJIN BAOBOTE SEALING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The seal used for the dredger mud pump shaft is an L-shaped seal. Because the contact medium of the dredger is mud, sand and water slurry, the use environment is harsh, and the damage is manifested in severe wear, tearing of the lip, and fracture of the waist. The lifespan is generally about 7 days. It has been dependent on imports for a long time. Imported products (made by IHC in Germany) generally have a lifespan of about 10 days. There is no product standard

Method used

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  • Ultra-large mud pump shaft L-shaped sealing element rubber
  • Ultra-large mud pump shaft L-shaped sealing element rubber
  • Ultra-large mud pump shaft L-shaped sealing element rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A super-large mud pump pump shaft L-shaped seal rubber compound, its raw material composition and parts by weight are as follows:

[0021]

[0022] The preparation method of the present embodiment comprises the steps:

[0023] ⑴ Internal mixing: Put the nitrile rubber raw material into the internal mixer and gradually heat it for 25 minutes. When the temperature reaches 110°C, the internal mixer starts to discharge the plastic compound rubber. 24 hours;

[0024] (2) Mixing: Add the above-mentioned cooled plasticized rubber to the internal mixer, add nano-zinc oxide, zinc stearate (SA), anti-aging agents (anti-aging agent RD and anti-aging agent (4010NA)), microcrystalline Wax, co-crosslinking agent (silicon 69, used as a rubber vulcanization aid), knead for 3 minutes, then mix the three kinds of carbon black and add it in two times for kneading. The method of adding carbon black is: first add Mix 2 / 3 carbon black for 2 minutes, add the remaining 1 / 3 carbon black, k...

Embodiment 2

[0028] A super-large mud pump pump shaft L-shaped seal rubber compound, its raw material composition and parts by weight are as follows:

[0029]

[0030] The preparation method of the present embodiment comprises the following steps:

[0031] ⑴ Internal mixing: Put the nitrile rubber raw material into the internal mixer and gradually heat it for 15 minutes. When the temperature reaches 120°C, the internal mixer starts to discharge the plastic compound rubber. 24 hours;

[0032] (2) Mixing: Add the above-mentioned cooled plasticized rubber to the internal mixer, add nano-zinc oxide, zinc stearate, anti-aging agents (anti-aging agent RD and anti-aging agent (4010NA)), microcrystalline wax, auxiliary Cross-linking agent (acting as a rubber vulcanization aid), after mixing for 4 minutes, mix the three kinds of carbon black and add it in two times for mixing. The method of adding carbon black is: first add 2 / 3 carbon black and mix 3 minutes, add the remaining 1 / 3 carbon black...

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Abstract

The invention relates to an ultra-large mud pump shaft L-shaped sealing element rubber which is prepared from butadiene-acrylonitrile rubber 220.240, sulfur, accelerator, peroxide, auxiliary crosslinking agent, nano zinc oxide, zinc stearate, anti-aging agent, carbon black, process oil DOP and microcrystalline wax. The invention has the advantages of high wear resistance, high strength, high pressure resistance, shock resistance and deformation resistance, and is superior to the foreign products; the service life is obviously prolonged, reaching 300 days; the performance indexes are far beyond the Chinese Standard; especially the compression deformation, which is the elastic recovery capacity after long-time stress of the rubber material, is the main index for judging the sealing property; and the Chinese technical level of the compression deformation is just or slightly beyond the Chinese Standard, but the compression deformation of the invention is down to 10 below.

Description

technical field [0001] The invention belongs to the field of sealing, and relates to a seal member of a pump shaft of a mud pump, in particular to a rubber material for an L-shaped seal member of a pump shaft of a super-large mud pump. Background technique [0002] The seal used for the dredger mud pump shaft is an L-shaped seal. Because the contact medium of the dredger is mud, sand and water slurry, the use environment is harsh, and the damage is manifested in severe wear, tearing of the lip, and fracture of the waist. The lifespan is generally about 7 days, and it has been dependent on imports for a long time. Imported products (produced by IHC in Germany) generally have a lifespan of about 10 days, and there is no product standard. [0003] Through the search, the following two related published patent documents were found: [0004] 1. A high-hardness rubber seal compound (CN102993478A), whose rubber raw material components and weight ratio are selected as 120-150 parts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08K13/02C08K3/06C08K5/14C08K3/22C08K5/098C08K3/04
Inventor 申会杰靳温学
Owner TIANJIN BAOBOTE SEALING TECH
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