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Composite structural idler and preparation method of corresponding synergistically modified friction material

A composite material and friction material technology, applied in the direction of rollers, conveyor objects, transportation and packaging, etc., can solve the problems of insufficient thermal and mechanical properties to cope with high-speed friction, increased friction coefficient of polyamide, and poor dimensional stability. Achieve low friction coefficient, excellent wear resistance, and improve friction performance

Active Publication Date: 2017-05-17
上海朔丰研新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its dimensional stability is poor, its water absorption rate is high, its friction coefficient is high during dry friction, and its thermal and mechanical properties are not enough to cope with high-speed friction, so its application is still limited to a certain extent.
In recent years, the addition of fibers and inorganic particles to improve the wear resistance and mechanical properties of polyamide at home and abroad often increases the friction coefficient; while the addition of solid lubricants can reduce the friction coefficient, but may increase the wear rate and reduce the friction coefficient. its mechanical properties

Method used

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  • Composite structural idler and preparation method of corresponding synergistically modified friction material
  • Composite structural idler and preparation method of corresponding synergistically modified friction material
  • Composite structural idler and preparation method of corresponding synergistically modified friction material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like Figures 1 to 7 As shown, the composite material structure idler includes a cylinder assembly, two bearing housings 3 containing bearings arranged on both sides of the cylinder assembly, and a sealing assembly connected to each bearing housing 3;

[0041] The barrel assembly includes a barrel 1 and a shaft 8 penetrating through the barrel 1 and the sealing assembly along the central axis; a retaining spring 7 is arranged outside the shaft.

[0042] The sealing assembly includes a sealing base 4 tightly matched with the bearing housing 3, and a sealing cover 5 closely matched with the sealing base 4. A sealed space is formed between the outer surfaces of the sealed space, and a sealed spacer ring 6 is installed in the sealed space, and the sealed space and the sealed spacer ring 6 form a labyrinth seal structure along the sealing route 15 . The sealing base 4 , the sealing spacer ring 6 and the sealing outer cover 5 can axially move in series due to the existence o...

Embodiment 2

[0049]1) Dissolve the coupling agent in a water-ethanol solution with a mass ratio of 1:9, add graphene or PTFE micropowder to be modified, and use ultrasonic dispersion for 1.5 to 3 hours to dry to constant weight. as a surface modifier. 2) According to the mass fraction of polyamide 75%, modified graphene: 5%, modified PTFE: 9.5%, glass fiber: 10, antioxidant 1010: 0.5% batching. 3) Mix at high speed for 0.5 hours, and mix evenly at a speed of 300-600 rpm; 4) The temperature of the twin-screw extruder is controlled at 190-250°C for mixing and extrusion, and the water-cooled pelletizer is cut into specifications of Φ2.5 ×4 pellets; 5) Dry at 100° C. for 3 hours.

[0050] The materials of this formula are analyzed and evaluated, and the following basic properties are obtained. Axial tensile strength: 71MPa, notched impact strength: 27.7KJ / m 2 , friction coefficient: 0.11, wear rate: 5.5×10 -6 mm 3 / Nm.

Embodiment 3

[0052] 1) Dissolve the coupling agent in a water-ethanol solution with a mass ratio of 1:9, add the graphene or PTFE micropowder to be modified, and use ultrasonic dispersion for 1.5 to 3 hours to dry to constant weight. 2) According to the mass fraction of polyamide 79%, modified graphene: 3%, modified PTFE: 7.7%, glass fiber: 10, antioxidant 1010: 0.3% batching. 3) Mix at high speed for 0.5 hours, and mix evenly at a speed of 300-600 rpm; 4) The temperature of the twin-screw extruder is controlled at 190-250°C for mixing and extrusion, and the water-cooled pelletizer is cut into specifications of Φ2.5 ×4 pellets; 5) Dry at 100° C. for 3 hours.

[0053] The materials of this formula are analyzed and evaluated, and the following basic properties are obtained. Axial tensile strength: 67MPa, notched impact strength: 23KJ / m 2 , friction coefficient: 0.17, wear rate: 6.3×10 -6 mm 3 / Nm.

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Abstract

The invention relates to a preparation method of a composite material structure carrier roller and corresponding synergistic modification friction materials. The preparation method is characterized in that the carrier roller comprises a cylinder body assembly, two bearing seats and sealing assemblies, wherein the bearing seats comprise bearings and are arranged on two sides of the cylinder body assembly, and the sealing assemblies are connected with the bearing seats respectively; the cylinder body assembly comprises a cylinder body and a shaft penetrating the cylinder body and the sealing assemblies along a central shaft; a support ring is arranged in the cylinder body; each of the sealing assemblies comprises a sealing pedestal cooperating with the corresponding bearing seat and a sealing outer cap which is in clearance fit with the corresponding sealing pedestal; and sealing space is formed between the inner side face of each of sealing outer caps and the outer side face of the corresponding sealing pedestal. According to the invention, due to the clearance fit among the sealing outer caps, the sealing pedestals and sealing separation rings, via the proper processing of the structure, a special labyrinth seal structure is formed, so sealing performance is improved without increasing of resistance and the labyrinth seal structure has high practical value.

Description

technical field [0001] The invention relates to the field of conveyors, in particular to parts of the conveyor, specifically to a preparation method of a composite material structure idler and a corresponding synergistically modified friction material. Background technique [0002] Idler rollers are used in bulk material transportation and other industries, and the demand is tens of thousands. The service life of the idler rollers directly affects the operation and maintenance costs of the entire conveying system. key. [0003] At present, there are rollers with various sealing structures such as multi-layer seals, contact seals, labyrinth seals, hard seals, and soft seals on the market, but their purpose is nothing more than to improve their sealing performance (dustproof, waterproof), reduce resistance, and improve service life. However, its effect is often contradictory. When the sealing performance is good, the resistance increases, and the resistance decreases, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65G39/09C08L77/02C08L27/18C08K7/14C08K3/04
CPCB65G39/09C08K2201/004C08L77/02C08L27/18C08K13/06C08K7/14C08K9/06C08K9/04C08K3/04C08K5/1345
Inventor 田振昆翟明选
Owner 上海朔丰研新材料科技有限公司
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