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Polyester material sliding bearing and preparation method thereof

A technology of sliding bearings and polyester materials, applied in the direction of bearing components, shafts and bearings, bearing bushings, etc., can solve the problem of environmental stress resistance and high processing accuracy, poor wear resistance and rigidity of polytetrafluoroethylene , Metal sliding bearings do not have self-lubricating properties, etc., to achieve the effects of light specific gravity, stable interface bonding, heat resistance and mechanical properties

Active Publication Date: 2018-04-13
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal sliding bearings do not have self-lubricating properties and require regular lubrication during use. At the same time, they have disadvantages such as large specific gravity and easy corrosion; PTFE plastics have extremely low friction coefficient, corrosion resistance, high and low temperature resistance, and the static friction coefficient is smaller than the dynamic friction coefficient. For bearings, the performance is small starting resistance, stable operation; excellent temperature resistance, stable friction coefficient, corrosion resistance medium, polytetrafluoroethylene is resistant to almost all solvents; however, pure polytetrafluoroethylene has poor wear resistance and rigidity , poor creep resistance
Nylon has good mechanical properties, good wear resistance and self-lubrication, good oil resistance, excellent chemical stability, resistance to most organic solvents, good creep resistance, and its disadvantage is that it is easy to absorb water and affect the dimensional stability of the product , cannot meet the requirements of environmental stress resistance and high machining accuracy

Method used

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  • Polyester material sliding bearing and preparation method thereof
  • Polyester material sliding bearing and preparation method thereof
  • Polyester material sliding bearing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see figure 1 and figure 2 , a sliding bearing of polyester material according to the present invention, comprising a reinforcing layer 1 and a wear-resistant layer 2, wherein the reinforcing layer 1 is arranged on the outside, and the wear-resistant layer 2 is arranged on the inside, so as to achieve the function of providing the wear resistance of the polyester material bearing .

[0036] Also refer to image 3 and Figure 4 , there is a stop structure between the reinforcement layer 1 and the wear-resistant layer 2 to prevent the two layers from sliding relative to each other. The clamping part structure is preferably a clamping part arranged on the outer surface of the wear-resistant layer 2 along the outer circumferential direction. The inner surface of layer 1 is provided with a card slot matching with the card part; preventing radial sliding between the reinforcement layer 2 and the wear-resistant layer 1 . In the present invention, the clamping portion may b...

Embodiment 2

[0049] A polyester material sliding bearing of the present invention has the same structure as that of Embodiment 1.

[0050] A preparation method of the polyester material sliding bearing of the present embodiment specifically includes the following steps:

[0051] (1) Weigh 100 parts by mass of PBT (the addition amount of PBT can be 50-100 parts by mass, and achieve the same or similar technical effect), 6 parts by mass of POE-g-MAH at a speed of 120r / min Mix evenly in the low-speed mixer, then join the twin-screw extruder, add 60 mass parts of glass fibers at the fiber port of the twin-screw extruder, then open the twin-screw extruder, and control the extrusion temperature to be 210 ~250°C, the screw speed is 300r / min to obtain the modified material A.

[0052] (2) Take by weighing 100 mass parts of PBT, 15 mass parts of molybdenum disulfide and 5 mass parts of silicone powder and mix them in a low-speed mixer at 120r / min, then transfer them to a twin-screw extruder Modif...

Embodiment 3

[0057] A polyester material sliding bearing of the present invention has the same structure as that of Embodiment 1.

[0058] A preparation method of the polyester material sliding bearing of the present embodiment specifically includes the following steps:

[0059] (1) The PET of 50 mass parts, the PBT of 50 mass parts, the POE-g-GMA of 6 mass parts are mixed in the low-speed mixer of 120r / min in rotating speed, then join twin-screw extruder, in Add 50 parts by mass of glass fiber to the fiberizing port of the twin-screw extruder, then turn on the twin-screw extruder, control the extrusion temperature to 220-260°C, and the screw speed to 300r / min to obtain modified material A.

[0060] (2) take by weighing the silicone powder of the PET of 50 mass parts, the PBT of 50 mass parts, the POE-g-GMA of 3 mass parts, the molybdenum disulfide of 10 mass parts, 10 mass parts graphite and 5 mass parts at a rotating speed of 120r / min in a low-speed mixer, and then transferred to a twin...

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PUM

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Abstract

The invention discloses a sliding bearing made of polyester material and a preparation method thereof, wherein the sliding bearing made of polyester material comprises a reinforcing layer as an outer layer and a wear-resistant layer as an inner layer, and the reinforcing layer is made of thermoplastic saturated polyester, reinforcing fiber, reinforced The toughening agent and the nucleating agent are prepared by extrusion and injection molding; the wear-resistant layer is prepared by extrusion and injection molding of thermoplastic saturated polyester, toughening agent and anti-friction aid. The preparation method of the polyester material sliding bearing comprises the steps of preparing a reinforcement layer, preparing a wear-resistant layer, processing into a bearing, and the like. The polyester material sliding bearing of the present invention can simultaneously have excellent mechanical properties, wear resistance, low water absorption, good dimensional stability, corrosion resistance and chemical solvent resistance, good formability, and good creep resistance under load conditions, etc. advantage.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a polyester material sliding bearing and a preparation method thereof. Background technique [0002] Sliding bearings are parts that support or guide the shaft, and are widely used in various mechanical equipment in production and life. Sliding bearings can be divided into metal bearings, plastic bearings, etc. according to the bearing lining material. Plastic bearings have the advantages of good self-lubricating performance, low friction coefficient, simple molding, low noise, light weight, etc., and have successfully replaced metal bearings in many occasions. However, the high temperature resistance and compression resistance of plastics are limited, and they are prone to deformation and accelerated wear under the action of heat and load. It is necessary to make up for the defects through material modification and structural optimization, which is an important direction for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/20C08L67/00C08L67/02C08K7/14C08K7/06B29D33/00
Inventor 陈智军杨金张志军
Owner ZHUZHOU TIMES NEW MATERIALS TECH