A kind of composite sliding bearing and its preparation method

A technology of sliding bearings and aluminum foam, applied in shafts and bearings, bearing components, mechanical equipment, etc., can solve the problems of weakened thermal conductivity improvement effect, large gap in thermal expansion coefficient, degumming of composite material interfaces, etc., achieving outstanding application value , excellent performance and excellent tribological properties

Active Publication Date: 2019-07-02
长沙精达高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the prior art manufactures this type of composite material, certain gas will be produced after the chemical reaction, and the thermal expansion coefficient difference between the aluminum foam and the polymer material is relatively large. Large, the effect of improving thermal conductivity is weakened; on the other hand, the obtained product is not dense and has defects in performance, so the scope of application of this process method is relatively limited

Method used

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  • A kind of composite sliding bearing and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The aluminum foam / polymer three-dimensional interpenetrating composite sliding bearing is produced according to the following steps:

[0036] Preparation of POM composite filler: After drying 60 parts by weight of POM (polyoxymethylene), 20 parts by weight of potassium hexatitanate whisker (PTW), and 20 parts by weight of PTFE (polytetrafluoroethylene) solid lubricant, add 0.3 parts by weight 1 part by weight of antioxidant B225 and 0.1 part by weight of triethanolammonium were mixed in a high-speed mixer, extruded and granulated at a temperature of 160°C to 190°C, and then dried for use.

[0037] The foamed aluminum blanks with a porosity of 60%, a pore diameter of 2mm, an inner diameter of Φ45mm, an outer diameter of Φ62mm, and a length of 62mm were sequentially washed in 3wt% NaOH aqueous solution for 6 minutes, and acid-washed in 3wt% HCI aqueous solution for 6 minutes. Minutes; rinse with water to make the rinse solution of foamed aluminum neutral; dry at a tempera...

Embodiment 2

[0041] The aluminum foam / polymer three-dimensional interpenetrating composite sliding bearing is produced according to the following steps:

[0042] Preparation of POM composite filler: After drying 70 parts by weight of POM, 10 parts by weight of potassium hexatitanate whisker (PTW), and 10 parts by weight of PTFE solid lubricant, add 0.1 parts by weight of antioxidant B225 and 0.3 parts by weight of three Ethanolammonium is mixed in a high-speed mixer, extruded and granulated at a temperature of 160°C to 190°C, and then dried for use.

[0043] The foamed aluminum blanks with a porosity of 80%, a pore diameter of 4mm, an inner diameter of Φ45mm, an outer diameter of Φ62mm, and a length of 62mm were sequentially washed in 8wt% NaOH aqueous solution for 4 minutes, and acid-washed in 8wt% HCI aqueous solution for 4 minutes. Minutes; rinse with water to make the rinse solution of foamed aluminum neutral; dry at a temperature of 80-100°C; then use 3wt% KH570 coupling agent hydroly...

Embodiment 3

[0047] The aluminum foam / polymer three-dimensional interpenetrating composite sliding bearing is produced according to the following steps:

[0048] Preparation of POM composite filling: After drying 65 parts by weight of POM, 15 parts by weight of potassium hexatitanate whisker (PTW), and 15 parts by weight of PTFE solid lubricant, add 0.2 parts by weight of antioxidant B225 and 0.2 parts by weight of three Ethanolammonium is mixed in a high-speed mixer, extruded and granulated at a temperature of 160°C to 190°C, and then dried for use.

[0049] The foamed aluminum blanks with a porosity of 70%, a pore diameter of 4mm, an inner diameter of Φ45mm, an outer diameter of Φ62mm, and a length of 62mm were sequentially washed in 5wt% NaOH aqueous solution for 5 minutes, and pickled in 5wt% HCI aqueous solution for 5 minutes. Minutes; rinse with water to make the rinse solution of foamed aluminum neutral; dry at a temperature of 80-100°C; then use 2wt% KH560 coupling agent hydrolyzat...

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Abstract

The invention relates to a compound sliding bearing and a preparation method thereof. Foamed aluminum is subjected to degreasing, alkali washing and acid pickling; then, a silane coupling agent is used for surface treatment; a layer of sulfonated graphene is deposited on the hole surface on the foamed aluminum treated in the steps by an electro-deposition method; the foamed aluminum deposited withthe sulfonated graphene is charged into an injection mold; wear-resistant plastic is subjected to injection molding by an injection molding process, and is cooled and formed; the wear-resistant plastic is prepared from at least one of materials from metaformaldehyde, polyether-ether-ketone, polyphenyl thioether, polyfluortetraethylene and ultra-high molecular weight polyethylene; the foamed aluminum before degreasing is prepared from pure aluminum and / or aluminum silicon alloy through foaming; the complete communicating hole system is realized; the porosity is 60 percent to 80 percent; the hole diameter is 2 to 4mm. The technical scheme provided by the invention has the advantages that a sulfonated graphene transition layer is introduced between the foamed aluminum and a polymer two-phaseinterface by an electrodeposition method; the technical problems of great interface heat resistance, interface degumming caused by different thermal expansion coefficients of the foamed aluminum anda polymer material, and the like are effectively solved.

Description

technical field [0001] The invention relates to the technical field of preparation of new material products and self-lubricating bearings, in particular to a composite sliding bearing; the invention also relates to a production method and application of the composite sliding bearing. Background technique [0002] Bearings are important parts in mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. According to the different friction properties of moving elements, bearings can be divided into two categories: rolling bearings and sliding bearings. Among them, the rolling bearing has been standardized and serialized. Compared with the sliding bearing, the radial dimension, vibration and noise of the rolling bearing are larger, and the price is also higher. [0003] The oil-free lubricating sliding bearings currently on the market are mainly copper alloy plus gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/16F16C33/20B29C45/14
Inventor 龙春光龙娜董佩冉
Owner 长沙精达高分子材料有限公司
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