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Prestressed vacuum grouting pump screw stator sleeve rubber compound and preparation method thereof

A technology of screw stator and rubber compound, which is applied in the field of rubber vulcanization, can solve the problems of bushing falling off, rubber falling off, affecting the life of bushing, etc., and achieve the effect of strong adhesion, high pass rate and good comprehensive performance

Inactive Publication Date: 2012-07-04
HEFEI SHICHUAN ENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The stator rubber sleeve of the prestressed vacuum grouting pump is also a vulnerable part of the prestressed vacuum grouting pump. Its selection will directly affect the life of the bushing. Generally, the life of the stator rubber sleeve is 3-6 months under normal circumstances. If the wrong compound is selected, the bushing may fall off from the steel pipe or the rubber may fall off

Method used

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  • Prestressed vacuum grouting pump screw stator sleeve rubber compound and preparation method thereof
  • Prestressed vacuum grouting pump screw stator sleeve rubber compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: A rubber compound for the screw stator cover of a prestressed vacuum grouting pump, the weight parts of which are composed of raw materials are: natural rubber 85-90, butyl rubber 0.5-0.7, silicone rubber VMQ 1.1-1.3, carboxylated nitrile rubber 4-6, methyl fluorosilicone rubber 1.5-2.0, zinc oxide 2-4, magnesium oxide 0.4-0.6, stearic acid 0.3-0.5, sulfur 0.3-0.6, antioxidant DPPD 0.2-0.4, carbon black N3398-12, Accelerator NOBS 0.1-0.3, paraffin 3-5, anti-scorch agent CTP0.2-0.3, soybean oil 4-6.

[0017] The preparation method comprises the following steps:

[0018] (1) Plastic training: Start the internal mixer, put natural rubber, isoprene rubber, butadiene rubber, and styrene-butadiene rubber into the internal mixer for plastic training, and knead until several kinds of rubber are fully fused. When the temperature reaches 110- 125°C, start discharging, stop and cool for 23-25 ​​hours after discharging;

[0019] (2) Mixing: Add the above-mentioned cool...

Embodiment 2

[0021] Embodiment 2: The stator rubber sleeve produced by a kind of prestressed vacuum grouting pump screw stator sleeve rubber compound of the present invention is compared with the ordinary stator rubber sleeve as shown in the following table

[0022]

[0023] Rubber product of the present invention and ordinary rubber product dynamic fatigue test performance contrast

[0024] Test conditions: Conditions: preload: 4900N, amplitude: ±3mm, frequency: 3Hz, at least 1.2 million times

[0025]

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PUM

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Abstract

The invention discloses a prestressed vacuum grouting pump screw stator sleeve rubber compound, which comprises the following constitutional raw materials in parts by weight: 85-90 parts of natural rubber, 0.5-0.7 parts of butyl rubber, 1.1-1.3 parts of silicon rubber VMQ, 4-6 parts of carboxyl nitrile rubber, 1.5-2.0 parts of methyl fluorosilicone rubber, 2-4 parts of zinc oxide, 0.4-0.6 parts of magnesium oxide, 0.3-0.5 parts of stearic acid, 0.3-0.6 parts of sulfur, 0.2-0.4 parts of anti-aging agent DPPD (Diphenyl-Phenylene-Diamine), 8-12 parts of carbon black N339, 0.1-0.3 parts of accelerant NOBS, 3-5 parts of paraffin, 0.2-0.3 parts of anti-scorching agent CTP and 4-6 parts of soybean oil. During preparation, a part of formula raw materials are subjected to compound plasticization according to requirements, then other formula materials are added to perform compound mixing, and finally a vulcanization system is added to perform mill run for 5-7 times. A prestressed vacuum grouting pump screw stator sleeve product produced by the rubber formula has excellent heat resistant aging performance and superior tear resistance performance and also has superior dynamic fatigue resistance performance.

Description

technical field [0001] The invention relates to the field of rubber vulcanization, in particular to a rubber compound for a screw stator cover of a prestressed vacuum grouting pump and a preparation method thereof. Background technique [0002] The stator rubber sleeve of the prestressed vacuum grouting pump is also a vulnerable part of the prestressed vacuum grouting pump. Its selection will directly affect the life of the bushing. Generally, the life of the stator rubber sleeve is 3-6 months under normal circumstances. If the wrong compound is selected, the bushing may fall off the steel pipe or the rubber may fall off. Therefore, we are required to conduct research on the formulation of rubber compounds. Contents of the invention [0003] The invention provides a rubber compound for a screw stator cover of a prestressed vacuum grouting pump and a preparation method thereof. The stator rubber cover produced by the rubber compound formula has good heat aging resistance a...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L23/22C08L83/04C08L13/00C08L83/08C08K13/02C08K3/22C08K3/04C08K5/01C08K5/09C08J3/24
Inventor 朱焕章丁煜倩张凯东张朝根刘庆柱王从凯朱友武王正宇
Owner HEFEI SHICHUAN ENG MACHINERY
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