CN207297630U - Self cooled roll-slide combined bearing can be achieved in one kind - Google Patents
Self cooled roll-slide combined bearing can be achieved in one kind Download PDFInfo
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- CN207297630U CN207297630U CN201721012068.7U CN201721012068U CN207297630U CN 207297630 U CN207297630 U CN 207297630U CN 201721012068 U CN201721012068 U CN 201721012068U CN 207297630 U CN207297630 U CN 207297630U
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- float support
- support block
- drill bit
- combined bearing
- slide combined
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Abstract
The utility model provides a kind of achievable self cooled roll-slide combined bearing, including interior revolving body, annular mounting groove between external gyrorotor and interior revolving body and external gyrorotor, several rolling elements and several float support blocks are installed in the annular mounting groove, hollow cavity is equipped with the float support block, filled out in the hollow cavity equipped with low-melting-point metal, the interior revolving body and the float support block are made of with the good wear-resistant material of retractility, when low-melting metal phase in the float support block is changed into liquid, the height of the float support block is more than the diameter of the rolling element.By implementing the technical program, it can quickly realize cooling down certainly for roll-slide combined bearing, avoid the generation of thermal wear phenomenon；And roll-slide combined bearing can bear higher load and rotating speed in itself, the broken drill bit being detachably connected is installed used in drill bit center portion, the drilling efficiency of composite drill bit can be effectively improved.
Description
Technical field
Probing drilling tool technical field is the utility model is related to, it is more particularly to a kind of that self cooled skid composite shaft can be achieved
Hold.
Background technology
Drill bit is to fractured rock, the rock crushing tool of formation pit shaft in drilling engineering.Now used in drilling engineering
Conventional bit mainly there is tricone bit, polycrystalline diamond compact bit (i.e. PDC drill bit) and percussion bit (also referred to as to spin
Drill bit or bore bit) etc..
PDC drill bit is a kind of scraping for rock to be cut or shear action broken rock using composite polycrystal-diamond (i.e. PDC teeth)
Drill bit.Due to possessing prominent superiority in terms of cutting element performance and broken rock mode, thus PDC drill bit it is soft extremely
The efficiency of breaking rock of medium ground is apparently higher than tricone bit.When PDC drill bit is being crept into compared with hard formation, broken by pure shear state
Crushed rocks, drill bit center portion cutting tooth opposite peripheral cutting tooth cutting linear velocity is very low, and PDC drill bit head is difficult to invade (wedging) well
Bottom rock surface, causes PDC drill bit rate of penetration slack-off, the serious efficiency of breaking rock for restricting PDC drill bit；Particularly when PDC teeth are sent out
After raw abrasion to a certain degree, difficulty higher is invaded, causes drill bit to skid in shaft bottom, drilling speed is extremely slow.Therefore, on PDC drill bit head
Center is provided with broken drill bit, crushes bearing between drill bit and bit body and connects.
In the prior art, bearing is divided into sliding bearing and rolling bearing.Conventional sliding bearing loaded area is big, can bear
Heavy duty, but bearing friction pair friction coefficient is big, and frictional heat rate is high, in the case where lubricating and cooling condition being poor, is not suitable for
In the operation of higher rotation speed.Contact between rolling bearing friction is secondary contacts for higher pair dotted line, makees in the running between parts of bearings
Rolling-operation, therefore friction coefficient is small, frictional heat rate is low, can bear high rotating speed, but because it is dotted line contact, hertz stress is high,
It is unsuitable for using under heavy duty or impact ground situation.Thus, the broken bearing connection set between drill bit and bit body exist with
Lower technical problem：1st, it is the continuously rock cutting under top load, thump and higher rotation speed to crush drill bit and drill bit, by
In the heat that severe friction produces drill bit can be made to reach quite high temperature, when temperature exceedes maximum heating load, drill bit is to axis
The rate of wear held substantially rises, and the generation of thermal wear phenomenon is easy to cause in the case of not possessing cooling condition.2nd, the axis of rolling
Although it is relatively low to hold frictional heat rate, hertz stress is high, does not possess the characteristic of high-speed overload.
Therefore, for above-mentioned technical problem, there is an urgent need for research one kind in broken drill bit and bit body high-speed rotation rock cutting
When, the connection bearing that can quickly cool down, in order to avoid thermal wear phenomenon is easy to cause in the case where not possessing cooling condition
Occur.
Utility model content
The purpose of this utility model is that：In order to solve the above-mentioned technical problem, the utility model provides a kind of can be achieved certainly
The roll-slide combined bearing of cooling, can quickly realize from cooling, and can bear higher load and rotating speed.
The utility model specifically uses following technical scheme to achieve these goals：
One kind can be achieved self cooled roll-slide combined bearing, including interior revolving body, external gyrorotor and interior revolving body and outer
Annular mounting groove between revolving body, is installed on several rolling elements and several float support blocks in the annular mounting groove,
Hollow cavity is equipped with the float support block, is filled out in the hollow cavity equipped with low-melting-point metal, the interior revolving body and described is floated
Dynamic supporting block is made of with the good wear-resistant material of retractility, and the low-melting metal phase in the float support block is changed into liquid
During body, the height of the float support block is more than the diameter of the rolling element.
The operation principle of the utility model base case：Annular mounting groove between the interior external gyrorotor of roll-slide combined bearing
Middle setting float support sliding block, makes bearing to share some mechanical load by float support block when rolling, reduces rolling
The hertz stress of kinetoplast, can make the roll-slide combined bearing bear higher load and rotating speed, meet broken drill bit and drill bit composition
Composite drill bit bearing the requirement of heavier load rotation speed operation；Before composite drill bit broken rock, the low-melting-point metal in hollow cavity exists
It is solid state under room temperature, broken drill bit can be rotated in the interior revolving body high speed of roll-slide combined bearing, be invaded easy to broken drill bit
Enter rock surface, and can break through compared with hard formation, and at this time since the interior revolving body for crushing drill bit and roll-slide combined bearing revolves at a high speed
Turn, the heat that severe friction produces can be absorbed by low-melting-point metal, reduce the temperature of roll-slide combined bearing, reduce skid composite shaft
Thermic load is held, avoids the generation of thermal wear phenomenon；Further, after the low-melting-point metal in float support sliding block absorbs amount of heat
Expansion of absorbing heat in liquid process is changed into from solid, volume becomes larger, and interior revolving body and the float support block of roll-slide combined bearing is equal
It is made of with the good wear-resistant material of retractility, float support block causes roll-slide combined bearing due to the phase transformation of low-melting alloy
Interior revolving body inwardly with broken drill bit even at the cost of one's life so that broken drill bit and bit body as the high rotating speed of integral structure, by force
The cooperation drilling of impact, can effectively improve the drilling efficiency of composite drill bit.
Further, the bearing is used for the broken drill bit being detachably connected in the installation of drill bit center portion.Beneficial effect：It can be achieved
Broken drill bit is removably mounted at the center portion of drill bit or is arranged on drill bit center portion in integrally connected, improves the broken rock effect of drill bit center portion
Rate, adaptation are broken through compared with hard formation.
Further, the rolling element is identical with the quantity of float support block, and the rolling element and the float support block
Spaced setting.Beneficial effect：Not only the high-revolving characteristic of bearing can be kept by rolling element, but also float support block can be passed through
Carrying and the impact resistance ability of bearing are improved, and is changed into when the low-melting-point metal in float support block undergoes phase transition reaction from solid
Liquid, when volume increases, also can inwardly extrude so that skid is compound from the interior revolving body external circumferential of roll-slide combined bearing
The interior revolving body of bearing is inwardly more preferable with broken drill bit locking effect.
Further, the both sides of the float support block offset with the rolling element.Beneficial effect：So that float support do and
Rolling element is connected as an entirety in annular mounting groove, improves bearing and resists top load and thump and the energy of higher rotation speed
Power.
Further, the low-melting-point metal is indium base bismuth-base alloy of the fusing point at 60 DEG C -85 DEG C.Beneficial effect：Using
Indium base, the low-melting-point metal of bismuth-base alloy are as phase-change material, its is safe and non-toxic, does not corrode aluminium and copper, and thermal conductivity is high；And indium base
The fusing point of bismuth-base alloy can be according to the heat regulation of generation, according to the different indium base bismuth-base alloys for needing that different melting points are made, side
Just obtain.
Further, the low-melting-point metal is Sn or the alloy containing Sn.Beneficial effect：The low melting point of Sn or alloy containing Sn
Metal phase change stablize, be stored in for a long time in float support block do not allow yet it is perishable.
Further, the joint face of the float support block and interior revolving body and external gyrorotor is arcwall face, the branch of floating
Bracer is in parallel block structure or fan-shaped block structure.Beneficial effect：When swelling volume does not become larger float support block, as
Connector between rolling element, resists top load and the ability of thump and higher rotation speed, so as to be arranged to for improving bearing
With interior revolving body and the corresponding joint face of external gyrorotor, worn in order to avoid being produced with interior revolving body and external gyrorotor.
Further, the interior revolving body and the float support block are made of copper or aluminium alloy.Beneficial effect：Copper or aluminium
Alloy price is low, convenient to obtain；It is harder solid under copper or Aluminum Alloy Room Temperature, easy to crush drilling bit high-speed rotary；And copper or aluminium
Alloy has preferable ductility at high temperature, can be smoothly so that interior revolving body when the volumetric expansion of float support block increases
Inwardly with broken drill bit even at the cost of one's life.
Further, the rolling element is set to solid roller.Beneficial effect：Enhancing structure rigidity, improves bearing capacity.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are：
1st, the utility model bit body center portion is provided with the roll-slide combined bearing for installing broken drill bit, it can be achieved that crushing
Drill bit is detachably connected with bit body, so that broken drill bit creeps into mode with exterior drill bit to rotate independently of one another broken rock, is led to
Cross after broken drill bit intrusion rock surface again by the common drilling well of composite drill bit, improve the efficiency of breaking rock of drill bit center portion, can smoothly attack
Break compared with hard formation.
2nd, float support sliding block and rolling element, rolling element and float support block are equipped with the utility model roll-slide combined bearing
Quantity it is identical, and rolling element and the spaced setting of float support block can be by floating while keeping bearing higher rotation speed characteristic
Dynamic supporting block shares some mechanical load, reduces the hertz stress of rolling element, and the roll-slide combined bearing can be made to bear higher load
Lotus and rotating speed, meet that the composite drill bit of broken drill bit and drill bit composition is bearing the requirement of heavier load rotation speed operation.
3rd, the hollow setting of float support sliding block in the utility model in roll-slide combined bearing, and filled out in hollow cavity equipped with low
Melting point metals, it is in stable condition under low-melting-point metal room temperature, in broken drill bit or high-speed rotating bit body, severe friction production
Raw heat can be absorbed by low-melting-point metal, reduce the temperature of roll-slide combined bearing and composite drill bit, reduce roll-slide combined bearing
Thermic load, avoids the generation of thermal wear phenomenon, extends the service life of drill bit, reduces drilling cost.
4th, interior revolving body and float support block is made of with the good wear-resistant material of retractility in the utility model, excellent
Elect as and be made of copper or aluminium alloy, so that phase transformation causes skid after float support block absorbs amount of heat due to low-melting alloy
The interior revolving body of composite bearing inwardly with broken drill bit even at the cost of one's life, and float support block is circumferentially disposed along interior revolving body, thus skid
The interior float support block of composite bearing is inwardly extruded along revolving body external circumferential so that the interior revolving body of roll-slide combined bearing to
It is interior more preferable with broken drill bit locking effect；So that broken drill bit and bit body are integrally formed formula by dismountable connection relation
The cooperation rock drilling of the high rotating speed of structure, thump, can effectively improve the drilling efficiency of composite drill bit.
Brief description of the drawings
The utility model will illustrate by example and with reference to the appended drawing, wherein：
Fig. 1 is；A kind of schematic diagram that self cooled roll-slide combined bearing embodiment can be achieved of the utility model；
Fig. 2 is；Before a kind of achievable self cooled roll-slide combined bearing embodiment float support block expansion of the utility model
Schematic diagram；
Fig. 3 is：After a kind of achievable self cooled roll-slide combined bearing embodiment float support block expansion of the utility model
Schematic diagram.
Reference numeral：Revolving body in 1- roll-slide combined bearings, 2-, 3- external gyrorotors, 4- annular mounting grooves, 5- rolling elements,
6- float supports block, 7- crush drill bit, 8- bit bodys.
Embodiment
In order to which those skilled in the art are better understood from the utility model, below in conjunction with the accompanying drawings with following embodiments to this
Utility model is described in further detail.
As shown in figures 1 and 3, the present embodiment provides one kind can be achieved self cooled roll-slide combined bearing, skid composite shaft
The 1 broken drill bit 7 for being used to be detachably connected in the installation of drill bit center portion is held, it can be achieved that broken drill bit 7 is removably mounted at drill bit
Center portion or the efficiency of breaking rock for being arranged on drill bit center portion, improving drill bit center portion in integrally connected, adaptation are broken through compared with hard formation；Skid
Composite bearing 1 includes the annular mounting groove formed between interior revolving body 2, external gyrorotor 3 and interior revolving body 2 and external gyrorotor 3
4,8 rolling elements 5 and 8 float support blocks 6 are installed in annular mounting groove 4, and rolling element 5 and float support block 6 are spaced
Set, and the both sides of float support block 6 offset with rolling element 5, which can both pass through 5 holding shaft of rolling element
High-revolving characteristic is held, and an entirety can be connected as in annular mounting groove 4 by float support block 6 and rolling element 5, is improved
Bearing resists top load and the ability of thump and higher rotation speed.
Further, hollow cavity is equipped with float support block 6, is filled out in hollow cavity excellent equipped with low-melting-point metal, low-melting-point metal
Elect indium base bismuth-base alloy of the fusing point at 60 DEG C -85 DEG C as, using indium base, bismuth-base alloy low-melting-point metal as phase-change material,
Its is safe and non-toxic, does not corrode aluminium and copper, and thermal conductivity is high；And the fusing point of indium base bismuth-base alloy can be according to the heat regulation of generation, root
It is convenient to obtain according to the different indium base bismuth-base alloys for needing that different melting points are made；Low-melting-point metal is also optional or Sn or containing Sn's
The low-melting metal phase of alloy, Sn or the alloy containing Sn stabilizes, and is stored in for a long time in float support block 6 and does not also allow mutability
Matter.Interior revolving body 2 and the float support block 6 are made of with the good wear-resistant material of retractility, in float support block 6
When low-melting metal phase is changed into liquid, the height of float support block 6 is more than the diameter of rolling element 5.Specifically, interior 2 He of revolving body
Float support block 6 is made of copper or aluminium alloy, and copper or aluminium alloy price are low, convenient to obtain；Under copper or Aluminum Alloy Room Temperature be compared with
Hard solid, is bored easy to broken.
Head height speed rotation；And copper or aluminium alloy have preferable ductility at high temperature, in 6 volumetric expansion of float support block
Since low-melting metal phase is changed into liquid when increase, the height of float support block 6 is more than the diameter of rolling element 5, so that floating
Dynamic supporting block 6 can smoothly in annular mounting groove 4 so that in revolving body 2 inwardly with broken drill bit 7 even at the cost of one's life so that broken bore
First 7 mutually lock with being arranged on the outer drill bit returned on shape body, and around the circumferentially disposed float support block 6 of interior revolving body 2 along
Crush the radially-inwardly attrition crushing drill bit 7 of drill bit 7 so that the interior revolving body 2 of roll-slide combined bearing 1 is inwardly locked with broken drill bit 7
Tight effect is more preferable.
In addition, rolling element 5 is set to solid roller, to enhancing structure rigidity, bearing capacity is improved；Float support block 6 with
The joint face of interior revolving body 2 and external gyrorotor 3 is arcwall face, float support block 6 in parallel block structure or fan-shaped block structure,
As the connector between rolling element 5, high carry is resisted for improving bearing when swelling volume does not become larger for float support block 6
The ability of lotus and thump and higher rotation speed, thus be arranged to 3 corresponding joint face of interior revolving body 2 and external gyrorotor, with
Exempt to produce abrasion with interior revolving body 2 and external gyrorotor 3.
In this example, bearing is used for the broken drill bit 7 being detachably connected in the installation of drill bit center portion, specifically, skid composite shaft
Hold in the annular mounting groove 4 between 12 external gyrorotor 3 of interior revolving body setting float support sliding block, make bearing do roll when
Time can be shared some mechanical load by float support block 6, reduced the hertz stress of rolling element 5, can be held the roll-slide combined bearing 1
By higher load and rotating speed, meet that the composite drill bit of broken drill bit 7 and drill bit composition is bearing heavier load rotation speed operation
It is required that；Before composite drill bit broken rock, fusing point in hollow cavity is solid state at normal temperatures in 85 DEG C of indium base bismuth-base alloy, is crushed
Drill bit 7 can be rotated in 2 high speed of interior revolving body of roll-slide combined bearing 1, invade rock surface easy to broken drill bit 7, and can attack
Break compared with hard formation, and at this time since the interior revolving body 2 for crushing drill bit 7 and roll-slide combined bearing 1 rotates at a high speed, severe friction produces
Heat can by fusing point 85 DEG C indium base bismuth-base alloy absorb, reduce roll-slide combined bearing 1 temperature, reduce skid composite shaft
1 thermic load is held, can quickly realize from cooling down, avoid the generation of thermal wear phenomenon；Further, the fusing point in float support sliding block exists
Reach fusing point after 85 DEG C of indium base bismuth-base alloy absorption amount of heat and expansion of absorbing heat in liquid process is changed into from solid, volume becomes
Greatly, and the interior revolving body 2 of roll-slide combined bearing 1 and float support block 6 are made of aluminium alloy, float support block 6 is due to molten
O'clock 85 DEG C of indium base bismuth-base alloy phase transformation cause the interior revolving body 2 of roll-slide combined bearing 1 inwardly with broken drill bit 7 even at the cost of one's life,
Interior revolving body 2 and external gyrorotor 3 are mutually locked so that broken drill bit 7 and bit body 8 as the high rotating speed of integral structure,
The cooperation drilling of thump, can effectively improve the drilling efficiency of composite drill bit, practicality is good, can be applicable.
The above, is only the preferred embodiment of utility model, is not intended to limit the utility model, the utility model
Scope of patent protection is subject to claims, the equivalent knot that every specification and accompanying drawing content with the utility model is made
Structure changes, and similarly should be included in the scope of protection of the utility model.
Claims (9)
1. self cooled roll-slide combined bearing, including interior revolving body, external gyrorotor and interior revolving body and outer time can be achieved in one kind
Annular mounting groove between swivel, it is characterised in that：Several rolling elements are installed in the annular mounting groove and several are floating
Dynamic supporting block, the float support block is interior to be equipped with hollow cavity, is filled out in the hollow cavity equipped with low-melting-point metal, the interior revolving body
It is made with the float support block of with the good wear-resistant material of retractility, the low-melting-point metal in the float support block
When being mutually changed into liquid, the height of the float support block is more than the diameter of the rolling element.
A kind of 2. achievable self cooled roll-slide combined bearing according to claim 1, it is characterised in that：The bearing is used
In the broken drill bit being detachably connected in the installation of drill bit center portion.
A kind of 3. achievable self cooled roll-slide combined bearing according to claim 1, it is characterised in that：The rolling element
It is identical with the quantity of float support block, and the rolling element and the spaced setting of float support block.
A kind of 4. achievable self cooled roll-slide combined bearing according to claim 3, it is characterised in that：The branch of floating
The both sides of bracer offset with the rolling element.
A kind of 5. achievable self cooled roll-slide combined bearing according to claim 1, it is characterised in that：The low melting point
Metal is indium base bismuth-base alloy of the fusing point at 60 DEG C -85 DEG C.
A kind of 6. achievable self cooled roll-slide combined bearing according to claim 1, it is characterised in that：The low melting point
Metal is Sn or the alloy containing Sn.
7. self cooled roll-slide combined bearing can be achieved in one kind according to claim 1-6 any one, it is characterised in that：
The joint face of the float support block and interior revolving body and external gyrorotor is arcwall face, and the float support block is in parallel block structure
Or fan-shaped block structure.
A kind of 8. achievable self cooled roll-slide combined bearing according to claim 1, it is characterised in that：The interior revolution
Body and the float support block are made of copper or aluminium alloy.
A kind of 9. achievable self cooled roll-slide combined bearing according to claim 1, it is characterised in that：The rolling element
It is set to solid roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721012068.7U CN207297630U (en) | 2017-08-14 | 2017-08-14 | Self cooled roll-slide combined bearing can be achieved in one kind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721012068.7U CN207297630U (en) | 2017-08-14 | 2017-08-14 | Self cooled roll-slide combined bearing can be achieved in one kind |
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| Publication Number | Publication Date |
|---|---|
| CN207297630U true CN207297630U (en) | 2018-05-01 |
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ID=62443931
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721012068.7U Active CN207297630U (en) | 2017-08-14 | 2017-08-14 | Self cooled roll-slide combined bearing can be achieved in one kind |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396336A (en) * | 2018-05-30 | 2018-08-14 | 长江师范学院 | A kind of anti-packet splicing method of aluminum cell crust breaking head |
| CN108642528A (en) * | 2018-05-30 | 2018-10-12 | 长江师范学院 | Aluminum cell crust breaking header structure |
-
2017
- 2017-08-14 CN CN201721012068.7U patent/CN207297630U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396336A (en) * | 2018-05-30 | 2018-08-14 | 长江师范学院 | A kind of anti-packet splicing method of aluminum cell crust breaking head |
| CN108642528A (en) * | 2018-05-30 | 2018-10-12 | 长江师范学院 | Aluminum cell crust breaking header structure |
| CN108642528B (en) * | 2018-05-30 | 2019-09-13 | 长江师范学院 | Aluminum cell crust breaking header structure |
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