High-mechanic thrust bearing and preparation process thereof
Technical field
The present invention relates to the technical field of bearings for submersible electric pump, a kind of high-mechanic thrust bearing and preparation process thereof specifically are provided.
Background technique
High-mechanic thrust bearing used in the present domestic submersible electric pump nearly all derives from import, this mainly is owing to the bonding difficulty between multipart bearing tile fragment on the thrust bearing and the special engineering plastics is higher, the external bonding mode that adopts as shown in Figure 1, be earlier at the surface of metal bearing tile fragment compacting one bronze medal layer 5, and then special engineering plastics is compressed on the copper, make it bonding each other; And produce according to external bonding mode so that domestic existing technology is next at present, then be difficult to quality and the cost of production of control product.
Summary of the invention
In order to overcome above-mentioned defective, the invention provides a kind of high-mechanic thrust bearing and preparation process thereof, this preparation process is simple, cost of production is low, and the superior product quality that makes through this preparation process.
The present invention for the technological scheme that solves its technical problem and adopt is: a kind of high-mechanic thrust bearing, comprise hollow disc shape bearing support body and a plurality of multipart bearing tile fragment, these a plurality of multipart bearing tile fragments circumferentially are movably arranged on the surface of described bearing support body at interval along described bearing support body; Also be formed with one dorsad on the surface of described bearing support body at each bearing tile and protrude from the boss that described bearing tile should the surface, and be coated with the clad that one deck is made by special engineering plastics at the outer circumferential face of each boss, and described clad extends to the periphery that each bearing tile should the surface.
As a further improvement on the present invention, this is symmetrically distributed to the central axis of individual multipart bearing tile fragment around described bearing support body.
As a further improvement on the present invention, be positioned on the described boss clad be positioned at this lip-deep clad of described bearing tile and flush.
As a further improvement on the present invention, all sides of each boss are all ramp structure, and each boss can cover each boss towards another surface of described bearing support body towards the projection of described bearing support body in a surface of described bearing support body dorsad.
As a further improvement on the present invention, these a plurality of multipart bearing tile fragments along the lip-deep structure that described bearing support body circumferentially at interval is movably arranged on described bearing support body are: also be formed with one at each bearing tile on another surface of described bearing support body and protrude from another surperficial raised line of this bearing tile, described raised line is strip and extends along the center line of described bearing tile; In addition it circumferentially spaced apartly is provided with a plurality of caulking grooves in a surperficial upper edge of described bearing support body, and these a plurality of raised lines can be embedded in these a plurality of caulking grooves in corresponding activity.
As a further improvement on the present invention, also offer many radially oil grooves that connect these inside and outside sidewalls of bearing support on another surfaces of this a plurality of bearing tiles dorsad at described bearing support body, and this many oil grooves are around the central axis symmetrical distribution of described bearing support body.
As a further improvement on the present invention, also be provided with a plurality of set screws, these a plurality of set screws circumferentially are installed on the surface of described bearing support body at interval along described bearing support body, and each bearing tile correspondence is movably arranged between adjacent two set screws.
As a further improvement on the present invention, along also all being formed with groove on the circumferential a pair of opposite flank of described bearing support body, the set screw that is arranged in each bearing tile both sides all can partly be placed in this groove at each bearing tile.
The present invention also provides a kind of preparation process of described high-mechanic thrust bearing, and this preparation process includes following steps:
A) physical dimension of described each parts of thrust bearing of design;
B) choose the stainless steel of suitable dimension size, make described bearing support body and a plurality of set screw by machined into, and by grinding machine processing the bearing support body is carried out surface rubbing and handle;
C) choose the stainless steel of suitable dimension size, make this a plurality of bearing tiles by machined into or casting machine processing, and make each boss dorsad the distance control on surface to described bearing tile one surface of described bearing support body at 0.2mm~5mm, each boss dorsad a surface of described bearing support body periphery to the distance control of the periphery on described bearing tile one surface at 0.2mm~10mm;
D) these a plurality of bearing tiles are carried out surface sand-blasting processing and acetone cleaning successively;
E) special engineering plastics is put into the barrel dryer and carried out the drying processing, wherein, drying temperature is controlled at 150 ℃~180 ℃, and control at 1hr~3 hr time of drying;
F) special engineering plastics after this a plurality of bearing tiles after step d) is handled and step e) are handled is thrown in together and is carried out injection moulding to the injection machine and process, die temperature control is at 175 ℃~220 ℃ during injection moulding, the control of injection machine gun barrel temperature is at 370 ℃~410 ℃, and the pressure of injection machine is controlled at 50MPa~100MPa; Other makes the THICKNESS CONTROL that is positioned at the described clad that the special engineering plastics on the described boss makes at 0.2mm~10mm;
G) these a plurality of bearing tiles after the injection moulding are ground by twin grinder;
H) will these a plurality of set screws and a plurality of bearing tile be assembled into successively on the surface of described bearing support body, again this thrust bearing integral body is carried out polishing treatment by the single face lapping machine after assembling is finished.
The invention has the beneficial effects as follows: by being formed with one and protruding from the boss that described bearing tile should the surface in a surface of described bearing support body dorsad at each bearing tile, and be coated with the clad that one deck is made by the PEEK special engineering plastics at the outer circumferential face of each boss, and each clad is all corresponding to extend to the periphery that each bearing tile should the surface, thereby clad can be coated on the bearing tile well, improve the product quality of thrust bearing effectively.
Description of drawings
Fig. 1 is the cross-sectional view after prior art middle (center) bearing tile fragment and the clad assembling;
Fig. 2 is the cross-sectional view after bearing tile of the present invention and the clad assembling;
Fig. 3 is a visual angle structural representation of thrust bearing of the present invention;
Fig. 4 is another visual angle structural representation of thrust bearing of the present invention;
Fig. 5 is a visual angle structural representation of bearing tile of the present invention;
Fig. 6 is another visual angle structural representation of bearing tile of the present invention.
By reference to the accompanying drawings, make the following instructions:
1---bearing support body 10---oil groove
2---bearing tile 20---boss
21---raised line 22---groove
3---clad 4---set screw
5---the copper layer
Embodiment
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
A kind of high-mechanic thrust bearing provided by the present invention, comprise hollow disc shape bearing support body 1 and a plurality of multipart bearing tile fragment 2 that the 2CR13 stainless steel is made, these a plurality of multipart bearing tile fragments 2 circumferentially are movably arranged on the surface of described bearing support body 1 at interval along described bearing support body; Also be formed with one dorsad on the surface of described bearing support body 1 at each bearing tile 2 and protrude from the boss 20 that described bearing tile should the surface, and be coated with the clad 3 that one deck is made by the PEEK special engineering plastics at the outer circumferential face of each boss 20, and described clad 3 extends to the periphery that each bearing tile should the surface.
Preferably, this is symmetrically distributed to the central axis of individual multipart bearing tile fragment 2 around described bearing support body.
Preferably, be positioned on the described boss 20 clad be positioned at described bearing tile 2 these lip-deep clads and flush.
Preferably, all sides of each boss 20 are all ramp structure, and each boss can cover each boss 20 towards another surface of described bearing support body 1 towards the projection of described bearing support body in a surface of described bearing support body 1 dorsad.
Preferably, these a plurality of multipart bearing tile fragments 2 along the lip-deep structure that described bearing support body circumferentially at interval is movably arranged on described bearing support body 1 are: also be formed with one at each bearing tile 2 on another surface of described bearing support body 1 and protrude from another surperficial raised line 21 of this bearing tile, described raised line is strip and extends along the center line of described bearing tile 2; In addition it circumferentially spaced apartly is provided with a plurality of caulking grooves in a surperficial upper edge of described bearing support body 1, and these a plurality of raised lines 21 can be embedded in these a plurality of caulking grooves in corresponding activity.
Preferably, also offer many radially oil grooves 10 that connect these inside and outside sidewalls of bearing support on another surfaces of this a plurality of bearing tiles 2 dorsad at described bearing support body 1, these many oil grooves are used for the circulation cooling, namely flow to take away the fricative heat of thrust bearing by cold oil; And these many oil grooves are symmetrically distributed around the central axis of described bearing support body.
Preferably, also be provided with a plurality of set screws 4, these a plurality of set screws 4 circumferentially are installed on the surface of described bearing support body at interval along described bearing support body, and each bearing tile 2 correspondence is movably arranged between adjacent two set screws 4, and these a plurality of set screws are in order to 20 position-limiting actions of bearing tile.
Preferably, along also all being formed with groove 22 on the circumferential a pair of opposite flank of described bearing support body, the set screw that is arranged in each bearing tile both sides all can partly be placed in this groove at each bearing tile 2.
Present embodiment also provides a kind of preparation process of described high-mechanic thrust bearing, and this preparation process includes following steps:
A) physical dimension of described each parts of thrust bearing of design;
B) choose the stainless steel of suitable dimension size, make described bearing support body 1(2CR13 stainless steel by machined into) and a plurality of set screw 4(304 or 316 stainless steels), and by grinding machine processing the bearing support body is carried out surface rubbing and handle;
C) choose the stainless steel of suitable dimension size, make this a plurality of bearing tile 2(2CR13 stainless steels by machined into or casting machine processing), and make each boss 20 dorsad the distance control on surface to described bearing tile one surface of described bearing support body 1 at 0.2mm~5mm, each boss dorsad a surface of described bearing support body 1 periphery to the distance control of the periphery on described bearing tile one surface at 0.2mm~10mm;
D) these a plurality of bearing tiles 2 are carried out surface sand-blasting processing and acetone cleaning successively;
E) the PEEK special engineering plastics is put into the barrel dryer and carried out the drying processing, wherein, drying temperature is controlled at 150 ℃~180 ℃, and control at 1hr~3 hr time of drying;
F) special engineering plastics after this a plurality of bearing tiles after step d) is handled and step e) are handled is thrown in together and is carried out injection moulding to the injection machine and process, die temperature control is at 175 ℃~220 ℃ during injection moulding, the control of injection machine gun barrel temperature is at 370 ℃~410 ℃, and the pressure of injection machine is controlled at 50MPa~100MPa; Other makes the THICKNESS CONTROL that is positioned at the described clad 3 that the special engineering plastics on the described boss 20 makes at 0.2mm~10mm;
G) a plurality of bearing tile of after the injection moulding this 2 is ground by twin grinder, guarantee the conformity of these a plurality of bearing tile total thickness, and the flatness of cover surface and roughness;
H) will these a plurality of set screws and a plurality of bearing tile be assembled into successively on the surface of described bearing support body 1, again this thrust bearing integral body is carried out polishing treatment by the single face lapping machine after assembling is finished.
In addition, needing also that before product export this thrust bearing is carried out the optical flat detector detects.