CN111231195A - Inlaid self-lubricating air ring bearing and manufacturing method thereof - Google Patents

Inlaid self-lubricating air ring bearing and manufacturing method thereof Download PDF

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Publication number
CN111231195A
CN111231195A CN201811439486.3A CN201811439486A CN111231195A CN 111231195 A CN111231195 A CN 111231195A CN 201811439486 A CN201811439486 A CN 201811439486A CN 111231195 A CN111231195 A CN 111231195A
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CN
China
Prior art keywords
shaft shell
bearing
wall
grooves
blank
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Pending
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CN201811439486.3A
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Chinese (zh)
Inventor
刘萍萍
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Individual
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Individual
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Priority to CN201811439486.3A priority Critical patent/CN111231195A/en
Publication of CN111231195A publication Critical patent/CN111231195A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/04—Bearings
    • B29L2031/045—Bushes therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/30—Fluoropolymers
    • F16C2208/32—Polytetrafluorethylene [PTFE]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/12—Rolling apparatus, e.g. rolling stands, rolls

Abstract

The invention discloses an embedded self-lubricating air ring bearing and a manufacturing method thereof, and the embedded self-lubricating air ring bearing comprises a shaft shell and a bushing, wherein the shaft shell is internally provided with a group of grooves, the bushing is a low-friction sliding ring body, the shape of the outer wall of the ring body is matched with the shape of the inner wall of the shaft shell, and the embedded self-lubricating air ring bearing is prepared by adopting the following method: firstly, a shaft shell is manufactured, a lubricant taking polytetrafluoroethylene as a base material is used as a raw material, and the bearing is manufactured by pressing, baking and shaping after uniform stirring. There is a set of slot in this bearing axle housing, and the slot inboard is big, and the outside is little, and the interlock each other of bush outer wall shape and axle housing inner wall shape fuses as an organic whole, and bush and axle housing firm in connection can not slide and drop. The shaft shell of the bearing uses the steel-based material to replace a part of special material with excellent anti-friction performance, thereby reducing the manufacturing cost and improving the mechanical strength; secondly, the bush of the bearing adopts a low-friction sliding ring body, the friction coefficient is small, the abrasion loss of the bearing is reduced when the bearing is used, and the service life of the bearing can be prolonged.

Description

Inlaid self-lubricating air ring bearing and manufacturing method thereof
Technical Field
The invention relates to a composite bearing and a manufacturing method thereof, in particular to a bearing with magnetic suspension or air flotation composite action and a manufacturing method thereof.
Technical Field
At present, air ring bearings are widely used in various machines, automobiles, clocks, instruments and electrical appliances, particularly in the industries of aluminum foil rolling mills and the like, dry friction exists in the starting process of the air ring bearings, and a dynamic pressure air film can be formed only when the rotating speed of the bearings reaches a certain value to enter a stable gas lubrication state; meanwhile, a dry friction state also exists in the stopping process, when the rotating speed of the bearing is reduced to a certain value, the formed air film disappears, the bearing enters the dry friction state, and the rotating speed of the bearing is reduced to zero under the action of dry friction. The bearing causes severe wear of the bearing working surface in a dry friction state and reduces the working life. Even the starting torque exceeds the air-driven rotation torque, so that the aerodynamic force cannot be started. Therefore, the shaft and the bearing must be made of special materials with excellent wear resistance, and the cost is high. Later, bimetallic materials were used to make bearings consisting of a shaft housing and a lining, which can be made by first making a steel-based shaft housing and a wear-resistant lining, respectively, the lining being a low-friction sliding ring made of Polytetrafluoroethylene (PTFE) as a base material, and then pressing the lining into the shaft housing by special means. The lining can also be formed by firstly manufacturing a steel-based shaft shell, then spraying the wear-resistant material on the inner surface of the steel-based shaft shell through a spraying process, and then baking and curing. However, the contact surface between the inner surface of the shaft housing of the bearing and the outer surface of the bushing is a smooth cylindrical surface, the shaft housing and the bushing are not firmly combined, the bushing and the shaft housing are easy to slide and separate under the action of radial force or axial force in the using process, and the service life of the bearing is short.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an embedded self-lubricating air ring bearing which not only realizes self-lubrication, but also has small friction coefficient and long service life.
The invention further solves the technical problem in the prior art and provides a manufacturing method for manufacturing the inlaid self-lubricating air ring bearing.
The above object of the present invention is achieved by the following technical solution, the above-mentioned mosaic self-lubricating air ring bearing comprises a shaft housing, the inside of the shaft housing is a hollow cylinder; the lubricating bushing is characterized in that a group of grooves which are distributed radially or axially are arranged on the inner wall of the shaft shell, the bushing is a low-friction sliding ring body which is formed by taking polytetrafluoroethylene as a base material, and the shape of the outer wall of the ring body is matched with that of the inner wall of the shaft shell.
The group of grooves on the inner wall of the shaft shell are dovetail grooves.
The group of grooves on the inner wall of the shaft shell are T-shaped grooves.
The invention discloses a manufacturing method of the mosaic type self-lubricating air ring bearing, which comprises the following steps:
A. manufacturing a shaft shell, processing steel to provide the shaft shell, wherein the inner wall of the shaft shell is manufactured to be provided with a group of grooves which are distributed radially or axially, and the grooves can also be manufactured to be dovetail grooves or T-shaped grooves;
B. pressing, namely uniformly stirring a lubricant taking Polytetrafluoroethylene (PTFE) as a base material, putting the raw material into an annular cavity of a special die, pressing the lubricant at a higher pressure, and pressing the lubricant into a bushing blank;
C. baking, namely pressing the bushing blank into the shaft shell, putting the bushing blank into a baking furnace for baking, melting and penetrating the solid lubricant into gaps of grooves on the inner wall of the shaft shell, discharging the bushing blank from the furnace and pressurizing the bushing blank while the bushing blank is hot, and after cooling and solidification, mutually meshing and connecting the bushing blank and the shaft shell into a whole to form a bearing blank;
D. and shaping, namely processing and shaping the bearing blank to obtain the bearing with specified dimensional accuracy. For example, machining, grinding, etc. is performed on the bearing blank.
Compared with the prior art, the invention has the following advantages: the inner wall of the shaft housing of the mosaic self-lubricating air ring bearing is provided with a group of grooves distributed radially or axially, the bushing is a low-friction sliding ring body formed by taking polytetrafluoroethylene as a base material, the shape of the outer wall of the ring body is matched with the shape of the inner wall of the shaft housing, particularly, the group of grooves on the inner wall of the shaft housing are dovetail grooves or T-shaped grooves, the inner side of each groove is large, the outer side of each groove is small, the shape of the outer wall of the bushing of the bearing is meshed with the shape of the inner wall of the shaft housing to be integrated, and the bushing and the shaft housing are firmly. The shaft housing of the bearing adopts steel base materials to replace a part of special materials with excellent wear resistance, thereby not only reducing the manufacturing cost, but also improving the mechanical strength, and secondly, the bush of the bearing adopts a low-friction sliding ring body which is formed by taking polytetrafluoroethylene as a base material, the friction coefficient is small, the abrasion loss is reduced when the bearing is used, and the service life of the bearing can be prolonged.
Drawings
FIG. 1 is a schematic structural view of a self-lubricating embedded air ring bearing of the present invention;
FIG. 2 is a schematic view of the structure of one embodiment of section A-A in FIG. 1;
FIG. 3 is a schematic view of the cross-sectional structure B-B in FIG. 2;
FIG. 4 is a schematic structural view of another embodiment of the section A-A in FIG. 1;
FIG. 5 is a schematic view of the cross-sectional structure C-C of FIG. 4;
FIG. 6 is a block diagram of a manufacturing process flow for a self-lubricating embedded air ring bearing of the present invention.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to fig. 1-6.
As shown in fig. 1, the mosaic self-lubricating air ring bearing of the present invention comprises a shaft housing 1, wherein the inside of the shaft housing 1 is a hollow cylinder; the difference between the lubricating bush 2 and the lubricating bush 2 is that a group of grooves 11 distributed in the radial direction or the axial direction are arranged on the inner wall of the shaft housing 1, the bush 2 is a low-friction sliding ring body which is formed by taking polytetrafluoroethylene (PTFE is a trade name) as a base material, and the shape of the outer wall of the ring body is matched with the shape of the inner wall of the shaft housing 1. As shown in fig. 2-3, the set of grooves 11 on the inner wall of the shaft housing 1 are dovetail grooves 12, and the dovetail grooves 12 can make the connection between the bushing 2 and the shaft housing 1 more firm. As shown in fig. 4-5, the set of grooves 11 on the inner wall of the shaft housing 1 are T-shaped grooves 13, and the T-shaped grooves 13 can make the connection between the bush 2 and the shaft housing 1 more secure.
As shown in fig. 6, the method for manufacturing a mosaic self-lubricating air ring bearing embodying the present invention comprises the steps of:
A. manufacturing a shaft shell, processing steel to provide the shaft shell 1, wherein the inner wall of the shaft shell 1 is manufactured to be provided with a group of grooves 11 which are distributed radially or axially, and the grooves 11 can also be manufactured to be dovetail grooves 12 or T-shaped grooves 13;
B. pressing, namely uniformly stirring a lubricant taking Polytetrafluoroethylene (PTFE) as a base material, putting the raw material into an annular cavity of a special die, pressing the lubricant at a higher pressure, and pressing the lubricant into a bushing blank;
C. baking, namely pressing the bushing blank into the shaft shell 1, then putting the bushing blank into a baking furnace for baking, melting and penetrating the solid lubricant into gaps of the grooves 11 on the inner wall of the shaft shell 1, discharging the bushing blank from the furnace and pressurizing the bushing blank while the bushing blank is hot, and after cooling and solidifying the bushing blank and the shaft shell are mutually occluded and connected into a whole to form a bearing blank;
D. and shaping, namely processing and shaping the bearing blank to obtain the bearing with specified dimensional accuracy. For example, machining, grinding, etc. is performed on the bearing blank.
The method for manufacturing the mosaic type self-lubricating air ring bearing can also be realized by comprising the following steps of:
A. manufacturing a shaft shell, processing steel to provide the shaft shell 1, wherein the inner wall of the shaft shell 1 is manufactured to be provided with a group of grooves 11 which are distributed radially or axially, and the grooves 11 can also be manufactured to be dovetail grooves 12 or T-shaped grooves 13;
B. spraying, namely, uniformly stirring a lubricant taking Polytetrafluoroethylene (PTFE) as a base material, then loading the raw material into a spraying device, and spraying the lubricant on the inner wall of the shaft shell to form a lining blank connected with the shaft shell 1;
C. baking, namely baking the bushing blank connected with the shaft shell in a baking furnace to enable the solid lubricating agent to be molten and to penetrate into gaps of the grooves 11 on the inner wall of the shaft shell 1, discharging, cooling and solidifying, and then mutually meshing and connecting the bushing blank and the shaft shell into a whole to form a bearing blank;
D. and shaping, namely processing and shaping the bearing blank to obtain the bearing with specified dimensional accuracy. For example, machining, grinding, etc. is performed on the bearing blank.

Claims (5)

1. An embedded self-lubricating air ring bearing comprises a shaft shell (1), wherein a hollow cylinder is arranged in the shaft shell (1); and the lubricating bush (2) is arranged on the inner surface of the shaft shell (1), and is characterized in that a group of grooves (11) distributed in the radial direction or the axial direction are arranged on the inner wall of the shaft shell (1), the bush (2) is a low-friction sliding ring body formed by taking polytetrafluoroethylene as a base material, and the shape of the outer wall of the ring body is matched with the shape of the inner wall of the shaft shell (1).
2. The self-lubricating embedded air ring bearing of claim 1, wherein: a group of grooves (11) on the inner wall of the shaft shell (1) are dovetail grooves (12).
3. The self-lubricating embedded air ring bearing of claim 1, wherein: a group of grooves (11) on the inner wall of the shaft shell (1) are T-shaped grooves (13).
4. A method of manufacturing a self-lubricating, self-inlaid air ring bearing according to claim 1, characterized in that: the method comprises the following steps:
A. manufacturing a shaft shell, processing steel to provide the shaft shell (1), wherein the inner wall of the shaft shell (1) is manufactured to be provided with a group of grooves (11) which are distributed radially or axially, and the grooves (11) can be manufactured to be dovetail grooves (12) or T-shaped grooves (13);
B. pressing, namely, uniformly stirring a lubricant taking Polytetrafluoroethylene (PTFE) as a base material, putting the raw material into an annular cavity of a special die, pressing the lubricant at a higher pressure, pressing the lubricant into a lining blank,
C. baking, namely pressing the bushing blank into the shaft shell (1), putting the bushing blank into a baking furnace for baking, melting and penetrating a solid lubricant into gaps of the grooves (11) on the inner wall of the shaft shell (1), discharging the bushing blank from the furnace, pressurizing the bushing blank while the bushing blank is hot, cooling and solidifying the bushing blank, and mutually meshing and connecting the bushing blank and the shaft shell (1) into a whole to form a bearing blank;
D. and shaping, namely processing and shaping the bearing blank to obtain the bearing with specified dimensional accuracy.
5. A method of manufacturing a self-lubricating, self-inlaid air ring bearing according to claim 1, characterized in that: the method comprises the following steps:
B. spraying, namely, uniformly stirring a lubricant taking Polytetrafluoroethylene (PTFE) as a base material, then loading the raw material into a spraying device, spraying the lubricant on the inner wall of the shaft shell (1), and spraying the lubricant into a bushing blank connected with the shaft shell (1);
C. and baking, namely putting the bushing blank connected with the shaft shell into a baking furnace for baking, melting and penetrating the solid lubricant into gaps of grooves on the inner wall of the shaft shell (1), discharging, cooling and solidifying, and then mutually meshing and connecting the bushing blank and the shaft shell (1) into a whole to form a bearing blank.
CN201811439486.3A 2018-11-29 2018-11-29 Inlaid self-lubricating air ring bearing and manufacturing method thereof Pending CN111231195A (en)

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CN201811439486.3A CN111231195A (en) 2018-11-29 2018-11-29 Inlaid self-lubricating air ring bearing and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811439486.3A CN111231195A (en) 2018-11-29 2018-11-29 Inlaid self-lubricating air ring bearing and manufacturing method thereof

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Publication Number Publication Date
CN111231195A true CN111231195A (en) 2020-06-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113696511A (en) * 2021-10-27 2021-11-26 北京玻钢院复合材料有限公司 Composite material and metal part dovetail groove integrated forming connecting structure and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113696511A (en) * 2021-10-27 2021-11-26 北京玻钢院复合材料有限公司 Composite material and metal part dovetail groove integrated forming connecting structure and method
CN113696511B (en) * 2021-10-27 2022-01-21 北京玻钢院复合材料有限公司 Composite material and metal part dovetail groove integrated forming connecting structure and method

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Application publication date: 20200605

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