CN202131978U - Tricone bit of abrasion resistant axial journal - Google Patents
Tricone bit of abrasion resistant axial journal Download PDFInfo
- Publication number
- CN202131978U CN202131978U CN201120241908U CN201120241908U CN202131978U CN 202131978 U CN202131978 U CN 202131978U CN 201120241908 U CN201120241908 U CN 201120241908U CN 201120241908 U CN201120241908 U CN 201120241908U CN 202131978 U CN202131978 U CN 202131978U
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- axle journal
- gear wheel
- bit
- journal
- axial
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Abstract
A tricone bit of an abrasion resistant axial journal comprises a cone, the axial journal and a rolling body. The axial journal is located on the lateral face of the outer side of the cone, crescent grooves are axially arranged on the axial journal, and abrasion resistant alloy layers are arranged in the grooves in bead welding mode. The crescent grooves and the abrasion resistant alloy bead welding layers are arranged on the pressed lateral face of the surface of the axial journal, thereby greatly enhancing strength and abrasion resistance of the surface of the axial journey, reducing abrasion of the axial journey, cone loosening and teeth touch and improving structural strength of a cone bit and mechanical properties of a cone bit bearing. In addition, the thickness arrangement of the abrasion resistance alloy bead welding layer is adapted to the distribution condition of the pressing stress exerted on the axial journal. Cost of abrasion resistance alloy bead welding materials is effectively saved.
Description
Technical field
The utility model relates to a kind of tricone bit, and particularly a kind of tricone bit that has wear-resisting axle journal belongs to the bit technique field.
Background technology
The heat treated metal material of the general employing of the axle journal of blasthole tricone rock bit at present.In the tricone bit structure, gear wheel center line (axle journal axis) with respect to the rig axis be 50～55 the degree axial rake, that is to say that the relative vertical direction of gear wheel is obliquely installed.During rock bit work; Rig imposes on the axial compression on the drill bit; Pass to gear wheel through axle journal and bearing, make axle journal to direction extruding, thereby make this side of axle journal and gear wheel inner surface produce bigger squeezing action near the gear wheel outside; Gear wheel drive rolling element rotates at a high speed around axle journal in addition, and the axle journal after feasible the working long hours very easily weares and teares with the surface of the side that gear wheel pushes mutually.Journal wear has not only destroyed bearing arrangement, has also increased the friction of axle journal and bearing inner surface, has reduced the operating efficiency of rock bit; The more important thing is that journal wear has strengthened the gap between axle journal and the gear wheel, cause the loosening and distortion of gear wheel; Make and bump the tooth phenomenon between gear wheel and the gear wheel easily; During the drill bit high speed rotating, bumping the tooth phenomenon and can greatly damage cone structure between gear wheel, the application life of reducing drill bit.
Summary of the invention
The utility model is directed against the shortcomings and deficiencies that prior art tricone bit axle journal is serious with the flank wear that gear wheel pushes mutually, drill bit structure is fragile, drilling life of bit is low; A kind of tricone bit that has wear-resisting axle journal is provided; Its axle journal abrasion resistance is high, and drill bit structure is stable, long service life.
This practicality is newly for realizing that the technical scheme that technical purpose adopts is:
A kind of tricone bit of wear-resisting axle journal comprises gear wheel, axle journal and rolling element, and said axle journal is axially arranged with open recess near the upper edge, side in the gear wheel outside, is provided with the antifriction alloy overlay cladding in the said open recess.
A kind of tricone bit of wear-resisting axle journal, the cross section of said open recess are crescent, and the arc top of said crescent open recess is positioned at the top of axle journal near the semi-circumference in the gear wheel outside.
A kind of tricone bit of wear-resisting axle journal, the depth capacity of said open recess are 2～5mm.
A kind of tricone bit of wear-resisting axle journal, the arc length of said open recess be axle journal circumference 1/3～1/2.
A kind of tricone bit of wear-resisting axle journal, said antifriction alloy overlay cladding adopts cobalt-chromium-tungsten alloy.
Compared with prior art, the characteristics of the utility model are:
1. be provided with open recess and antifriction alloy overlay cladding with side that gear wheel pushes mutually on the axle journal; Significantly strengthened the surface strength and the abrasion resistance of axle journal, reduced the journal wear phenomenon, and gear wheel becomes flexible, bumps the tooth phenomenon; Improve the structural strength of rock bit, prolonged the application life of drill bit.
2. through the setting of open recess, the overlay cladding that the journal surface part is increased does not change the physical dimension of axle journal, has guaranteed the operate as normal of rock bit.
3. only in the axle journal local surfaces antifriction alloy overlay cladding is set, and the cross section of antifriction alloy overlay cladding is crescent, the extruding load that its thickness and journal surface receive adapts, and under the prerequisite that guarantees the axle journal abrasion resistance, has significantly practiced thrift wear resistant alloy material.
Description of drawings
Fig. 1 is the structural representation of tricone bit of the wear-resisting axle journal of the utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Among the figure: gear wheel 1, axle journal 2, rolling element 3, open recess 4, antifriction alloy overlay cladding 5.
The specific embodiment
Referring to Fig. 1 and Fig. 2, the tricone bit of the wear-resisting axle journal that the utility model provides comprises gear wheel 1, axle journal 2 and rolling element 3, and axle journal 2 is axially arranged with open recess 4 near the upper edge, side in the gear wheel outside, is provided with antifriction alloy overlay cladding 5 in the open recess 4.In the tricone bit, gear wheel center line (being the axle journal axis) is the axial rake of 50～55 degree with respect to the rig axis, that is to say that the relative vertical direction of gear wheel is obliquely installed, and wherein, a side that contact with the rock stratum is the gear wheel outside, and a relative side is the gear wheel inboard.During tricone bit work; Rig imposes on the axial compression of axle journal 2; Make axle journal 2 tilt to the direction in the gear wheel outside, thereby axle journal 2 produces bigger squeezing action near the inner surface of the side surface in the gear wheel outside and gear wheel 1, axle journal 2 is then less near the squeezing action of the side surface of gear wheel inboard and gear wheel 1; Thereby after drill bit worked long hours, axle journal 2 more was prone to produce wearing and tearing near the side surface in the gear wheel outside.The tricone bit that the utility model provides; On the side of axle journal 2, open recess 4 is set near the gear wheel outside, and processing antifriction alloy overlay cladding 5, the surface strength and the abrasion resistance of the extruded side of axle journal 2 significantly strengthened; Reduced the journal wear phenomenon; And gear wheel becomes flexible, bumps the tooth phenomenon, improved the structural strength of rock bit, prolonged the application life of drill bit.And through the setting of open recess, the overlay cladding that the journal surface part is increased does not change the physical dimension of axle journal, has guaranteed the operate as normal of rock bit.For further strengthening the abrasion resistance of axle journal, can select the good cobalt-chromium-tungsten alloy built-up welding of abrasion resistance for use.
The blasthole tricone rock bit of the wear-resisting axle journal that the utility model provides, the shape of cross section of open recess 4 can be crescent, and the arc of crescent open recess 4 top is positioned at the top of the semi-circumference in the gear wheel outside 6.Meniscate antifriction alloy overlay cladding 5 thickness radially is different, and the arc top of crescent moon is positioned at the maximum position of the effect of being squeezed, and the thickness of wearing layer is also maximum; Thickness to both sides reduces crescent moon gradually from the arc top, adapts to the squeezing action that journal surface reduces gradually, thereby; Meniscate wear-resistant alloy layer 5; The setting of its different-thickness adapts with the different stressed distribution situation of journal surface, under the prerequisite of the scuff resistance of guaranteeing axle journal 2, significantly practices thrift the wear resistant alloy material cost.Take all factors into consideration the stressing conditions of axle journal 2, the depth capacity of crescent open recess 4 can be set to 2～5mm, arc length can be set to axle journal 2 circumference 1/3～1/2.
Combine accompanying drawing that the embodiment of the utility model is specified above; But the utility model is not limited to the foregoing description; In the ken that those of ordinary skills possessed, can also make various variations not breaking away under the utility model aim prerequisite.
Claims (5)
1. the tricone bit of a wear-resisting axle journal; Comprise gear wheel (1), axle journal (2) and rolling element (3); It is characterized in that: said axle journal (2) is axially arranged with open recess (4) near the upper edge, side in the gear wheel outside, is provided with antifriction alloy overlay cladding (5) in the said open recess (4).
2. the tricone bit of a kind of wear-resisting axle journal according to claim 1, it is characterized in that: the cross section of said open recess (4) is a crescent, the arc top of said crescent open recess (4) is positioned at the top of axle journal (2) near the semi-circumference in the gear wheel outside.
3. the tricone bit of a kind of wear-resisting axle journal according to claim 2, it is characterized in that: the depth capacity of said open recess (4) is 2～5mm.
4. the tricone bit of a kind of wear-resisting axle journal according to claim 2 is characterized in that: the arc length of said open recess (4) be axle journal (2) circumference 1/3～1/2.
5. the tricone bit of a kind of wear-resisting axle journal according to claim 1 and 2 is characterized in that: said antifriction alloy overlay cladding (5) employing cobalt-chromium-tungsten alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120241908U CN202131978U (en) | 2011-07-11 | 2011-07-11 | Tricone bit of abrasion resistant axial journal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120241908U CN202131978U (en) | 2011-07-11 | 2011-07-11 | Tricone bit of abrasion resistant axial journal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202131978U true CN202131978U (en) | 2012-02-01 |
Family
ID=45520751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120241908U Expired - Fee Related CN202131978U (en) | 2011-07-11 | 2011-07-11 | Tricone bit of abrasion resistant axial journal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202131978U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343667A (en) * | 2013-07-16 | 2013-10-09 | 江汉石油钻头股份有限公司 | Steel PDC drilling bit with erosion-proof tooth cavities |
| CN103939023A (en) * | 2014-04-30 | 2014-07-23 | 天津立林钻头有限公司 | Roller bit, tool for installing roller bit check ring and installing method of check ring |
| CN104941808A (en) * | 2015-07-03 | 2015-09-30 | 艾尼科环保技术(安徽)有限公司 | Revolving-brush wear-resistant coupling shaft for electrostatic dust collector |
-
2011
- 2011-07-11 CN CN201120241908U patent/CN202131978U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343667A (en) * | 2013-07-16 | 2013-10-09 | 江汉石油钻头股份有限公司 | Steel PDC drilling bit with erosion-proof tooth cavities |
| CN103343667B (en) * | 2013-07-16 | 2015-10-14 | 江汉石油钻头股份有限公司 | A kind of tooth cave fluid erosion prevention steel body PDC drill bit |
| CN103939023A (en) * | 2014-04-30 | 2014-07-23 | 天津立林钻头有限公司 | Roller bit, tool for installing roller bit check ring and installing method of check ring |
| CN104941808A (en) * | 2015-07-03 | 2015-09-30 | 艾尼科环保技术(安徽)有限公司 | Revolving-brush wear-resistant coupling shaft for electrostatic dust collector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20170711 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |