CN104165028A - Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit - Google Patents
Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit Download PDFInfo
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- CN104165028A CN104165028A CN201410410257.4A CN201410410257A CN104165028A CN 104165028 A CN104165028 A CN 104165028A CN 201410410257 A CN201410410257 A CN 201410410257A CN 104165028 A CN104165028 A CN 104165028A
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Abstract
The invention relates to the technical field of drilling tools, in particular to a roller cone bit and a method for installing a roller cone bearing sealing system of the roller cone bit. The roller cone bit comprises a roller cone, a roller palm shaft and positioning steel balls used for fixing the roller cone and the roller palm shaft, wherein a roller cone bearing hole is formed in the root of the roller cone, the bearing sealing system is arranged in the roller cone bearing hole and is composed of a metal roller cone sealing ring, a metal roller palm sealing ring, a metal and rubber roller cone sealing ring and a wave spring used for supplying power to a metal roller cone ring, the metal and rubber roller cone sealing ring is located on one side of the metal roller cone sealing ring and is used for sealing the gap between the metal roller cone sealing ring and the roller cone bearing hole. According to the roller cone bit and the method for installing the roller cone bearing sealing system of the roller cone bit, through the metal end face sealing system mainly powered by the crest-to-crest wave spring or is completely powered by the crest-to-crest wave spring, the specific contact pressure of a sealed end face can be accurately controlled, and the specific contact pressure is high, lasting and constant.
Description
Technical field
The present invention relates to drilling tool technical field, relate in particular to a kind of rock bit.
Background technology
Rock bit is a kind of instrument of fractured rock in the earth's crust, the fields such as extensive use and oil, gas drilling and the probing of other mineral resources and exploitation.
The analysis that tricone bit was lost efficacy shows; the damage of bearing is the principal mode that rock bit lost efficacy; and the overwhelming majority that bearing lost efficacy is in advance because bearing seal system lost efficacy; causing bearing lubrication grease to run off differently enters to invade bearing and causes; therefore we often can see rock bit tooth wear not serious, and bearing but lost efficacy and spacious moving phenomenon.
As everyone knows, the elasticity that sealing system now is all utilized hydrogenated nitrile-butadiene rubber (HNBR) provides energy for sealed working face, hydrogenated nitrile-butadiene rubber (HNBR) is in chemical resistance, compress permanent deformation elasticity forever, and tearing strength aspect has excellent performance, yet in the drilling well occasion under the continuous well circulating temperature on 120 ℃, hydrogenated nitrile-butadiene rubber (HNBR) material elements that is used to sealing system energy supply will be accelerated aging and lost efficacy (must competing hydrogenated nitrile-butadiene rubber (HNBR) vulcanization forming temperature just 170 ℃), once haveing suffered sealing system, the inefficacy of sealing system rubber element will collapse immediately under the bad working environments of down-hole, cause bearing failure drill bit report degree, if can not find in time, will lead to down-hole accident.
The specific contact pressure of sealing surface is the key parameter of metal end face seal and rubber seal.If the too little just envelope of specific pressure is incessantly, the excessive work plane of specific pressure quick abrasion, the life-span is short.The sealing system work plane newly installing has certain specific contact pressure, and it at least must be greater than seal pressure differential, otherwise must leak undoubtedly, and along with the progress of work of sealing system, the hydrogenated nitrile-butadiene rubber of sealing system (HNBR) original paper can aging and wearing and tearing.Therefore new clothes drill bit specific contact pressure can be larger, large how many guarantees seal does not leak, this will see the width of sealing surface, the material property on both sides, surface configuration and roughness, the quality of rock bit operating mode medium (water, oil, mud, grease or air), pressure, temperature etc. condition, the medium of bearing seal system inner side is high viscosity bearing grease, and outside is the mud containing landwaste.The tens of MPa of environment stress scope, temperature range is tens of to more than 100 degrees Celsius, under above-mentioned these conditions, the drill bit of different model will be faced different operating modes, how the accurate rock bit sealing system for different model provides sealing surface constant lasting specific contact pressure, is the key point of sealing system.To be engaged in the problem that industry project planner must do.
When Fig. 1 is 12 1/4 inches of tricone bit bearing assembles of certain type, the specific contact pressure of sealing system work plane and the change in displacement of sealing system, this curvilinear statistical graph is to collect 100 results that drill bit is tested on metal sealing racking machine.From above statistical form, can find, same sealing system (each component size of sealing system is all by designing requirement manufacture, and qualified after testing) displacement 1.45-2mm, sealing surface specific contact pressure is from 50KG-90KG, and excursion is very large.Illustrate that sealing system now can not accurately control the specific contact pressure of sealing system.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned technology, and a kind of rock bit is provided, improve the sealing performance of sealing system.
The present invention for achieving the above object, by the following technical solutions:
A kind of rock bit, comprise gear wheel, bit leg axle and for by described gear wheel and the fixing locking ball of bit leg axle, the root of described gear wheel is provided with gear wheel dead eye, in described gear wheel dead eye, be provided with bearing seal system, it is characterized in that: described bearing seal system is by cone metal joint ring, bit leg metallic packing ring, cone metal rubber seal, the energy supply of cone metal ring forms with wavy spring, described cone metal joint ring and the bit leg metallic packing ring composition end face seal structure that contacts, described cone metal joint ring middle part is with fluted, the energy supply of described cone metal ring is placed in described groove with wavy spring, the energy supply of cone metal ring touches with the inwall of wavy spring top and described gear wheel dead eye, described cone metal rubber seal is positioned at described cone metal joint ring one side, for sealing the gap between cone metal joint ring and gear wheel dead eye.
Preferably, the cross section of described bit leg metallic packing ring is square.
Preferably, the cross section of described bit leg metallic packing ring is trapezoidal, is provided with bit leg metal ring rubber energy supply circle between described bit leg metallic packing ring and described bit leg axle.Operative end surface essence is spread out to minute surface, and can have coating or there is no coating, and inner side is that chamfered surface sandblast prevents that for rubber energy supply circle is installed rubber ring from rotating.
Preferably, described cone metal joint ring and bit leg metallic packing ring form by the stainless tool steel of high-strength alloy is refining, and operative end surface essence is spread out into minute surface, and flatness is less than 0.005mm, and roughness is less than 0.2.
Preferably, the energy supply of described cone metal ring is rolled up rich, stacking forming with wavy spring continuously by high-strength alloy Stainless Steel lenticular wire material one circle circle.
A mounting method for gear wheel bearing seal system, is characterized in that: comprise the following steps: first clean gear wheel dead eye, bit leg axle and all sealing system original papers and dry up with clean gas, leaving in respectively on special-purpose clean container or workbench;
Second step is assemblied in the gear wheel dead eye of gear wheel bearing by cone metal joint ring, cone metal rubber seal and the energy supply of cone metal ring with wavy spring;
The 3rd step is fixed on bit leg axle on metal sealing racking machine, center line and the metal sealing racking machine axis of bit leg axle are harmonious, bit leg metallic packing ring, bit leg metal ring rubber energy supply circle are then installed, after installation, machinery oil ， Shang oil level in bit leg metallic packing ring operative end surface Shang Shang tri-Shang cleaning is put evenly;
The 4th step is sleeved on the gear wheel bearing integral after having assembled on bit leg axle along bit leg axis;
Whether the 5th step meets the requirements with load (specific contact pressure) and the displacement curve of metal sealing racking machine survey line sealing system, changes sealing original paper as do not met, and ressembles, until meet designing requirement;
Locking steel ball and plug pin are finally installed, and are welded and fixed plug pin.
The invention has the beneficial effects as follows: compared with prior art, the present invention is by take to top ripple spring as master or all by the metal end face seal system to top ripple spring energy supply, seal face can accurately be controlled specific contact pressure, specific contact pressure is larger and constant lastingly, although can produce the gear wheel axial vibration causing because of bearing axial clearance during rock bit work, the drill bit that journal offset causes slides, and the thousands of meters of vibrations that elasticity roofbolt causes, can carry out in time kinetic energy supply, simultaneously because the main energy supply element of sealing system is rigidity element, rigidity curve smoothing, displacement is large, so sealing system is high temperature resistant, life-span is long.
Accompanying drawing explanation
Specific contact pressure curvilinear statistical graph when Fig. 1 is 100 drill bit assemblings of existing metal end face seal system;
Fig. 2 is to top wavy spring structural representation;
Fig. 3 is the lateral view of Fig. 2;
Fig. 4 is 100 rigidity curvilinear statistical graphs to top wavy spring;
Fig. 5 is existing metal end face sealing structure figure;
Fig. 6 is the partial enlarged drawing of Fig. 5;
Fig. 7 is that wavy spring energy supply belongs to end face seal the first structure entirely;
Fig. 8 is the partial enlarged drawing of Fig. 7;
Fig. 9 is that wavy spring energy supply belongs to end face seal the second structure entirely;
Figure 10 is the partial enlarged drawing of Fig. 9.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment, describe the specific embodiment of the present invention in detail.As shown in Figure 7 and Figure 8, a kind of rock bit, comprise gear wheel, bit leg 2 and for by described gear wheel and the fixing locking ball 9 of bit leg, the root of described gear wheel is provided with gear wheel dead eye 1, in described gear wheel dead eye, be provided with bearing seal system, described bearing seal system is by cone metal joint ring 3, bit leg metallic packing ring 4, cone metal rubber seal 6, the energy supply of cone metal ring forms with wavy spring 7, described cone metal joint ring and the bit leg metallic packing ring composition end face seal structure that contacts, described cone metal joint ring middle part is with fluted, the energy supply of described cone metal ring is placed in described groove with wavy spring, the energy supply of cone metal ring touches with the inwall of wavy spring top and described gear wheel dead eye, described cone metal rubber seal is positioned at described cone metal joint ring one side, for sealing the gap between cone metal joint ring and gear wheel dead eye.
As shown in Figures 2 and 3, be from a kind of bearing seal system for 8 1/2 inches of tricone bit metal end faces of external customization to top wavy spring, inspect 100 end flat degree by random samples and be all less than 0.1mm, apparent size is accurate, Fig. 4 is with batch 100 rigidity curvilinear statistical graphs that top wavy spring is tested out on metal sealing racking machine, from scheming, can find out that displacement and load variations scope are very little, almost consistent.And rigidity curve smoothing, displacement range is large, provides energy high.Therefore for novel wavy spring energy supply metal end spherical bearing sealing system, can accurately control the specific contact pressure of sealing system.
As shown in Figure 9 and Figure 10, the cross section of described bit leg metallic packing ring is square.
As shown in Figure 7 and Figure 8, the cross section of described bit leg metallic packing ring is trapezoidal, is provided with bit leg metal ring rubber energy supply circle 5 between described bit leg metallic packing ring and described bit leg axle.Operative end surface essence is spread out to minute surface, and can have coating or there is no coating, and inner side is that chamfered surface sandblast prevents that for rubber energy supply circle is installed rubber ring from rotating.
Described cone metal joint ring and bit leg metallic packing ring form by the stainless tool steel of high-strength alloy is refining, and operative end surface essence is spread out into minute surface, and flatness is less than 0.005mm, and roughness is less than 0.2.
The energy supply of described cone metal ring is rolled up rich, stacking forming with wavy spring continuously by high-strength alloy Stainless Steel lenticular wire material one circle circle.For metallic packing ring provides kinetic energy.Metallic packing ring is 1 or many, the effect fitting together during the work of metal end face inside and outside isolation bearing is got in axle reverse rotation.Described bit leg metal ring rubber energy supply circle, cone metal rubber seal are by the full hydrogenated nitrile-butadiene rubber system of closing of height.
The present invention also provides a kind of mounting method of gear wheel bearing seal system, the method is used for installing above-mentioned rock bit, comprise the following steps: first clean gear wheel dead eye, bit leg axle and all sealing system original papers and dry up with clean gas, leaving in respectively on special-purpose clean container or workbench;
Second step is assemblied in the gear wheel dead eye of gear wheel bearing by cone metal joint ring, cone metal rubber seal and the energy supply of cone metal ring with wavy spring;
The 3rd step is fixed on bit leg axle on metal sealing racking machine, center line and the metal sealing racking machine axis of bit leg axle are harmonious, bit leg metallic packing ring, bit leg metal ring rubber energy supply circle are then installed, after installation, machinery oil ， Shang oil level in bit leg metallic packing ring operative end surface Shang Shang tri-Shang cleaning is put evenly;
The 4th step is sleeved on the gear wheel bearing integral after having assembled on bit leg axle along bit leg axis;
Whether the 5th step meets the requirements with load (specific contact pressure) and the displacement curve of metal sealing racking machine survey line sealing system, changes sealing original paper as do not met, and ressembles, until meet designing requirement;
Locking steel ball and plug pin are finally installed, and are welded and fixed plug pin 8.By above-mentioned mounting method, can will with wavy spring, be installed in gear wheel axis hole with cone metal ring function, rapid and convenient, increases work efficiency.
Compared with prior art, the present invention is by take to top ripple spring as master or all by the metal end face seal system to top ripple spring energy supply, seal face can accurately be controlled specific contact pressure, specific contact pressure is larger and constant lastingly, although can produce the gear wheel axial vibration causing because of bearing axial clearance during rock bit work, the drill bit that journal offset causes slides, and the thousands of meters of vibrations that elasticity roofbolt causes, can carry out in time kinetic energy supply, simultaneously because the main energy supply element of sealing system is rigidity element, rigidity curve smoothing, displacement is large, so sealing system is high temperature resistant, life-span is long.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a rock bit, comprise gear wheel, bit leg axle and for by described gear wheel and the fixing locking ball of bit leg axle, the root of described gear wheel is provided with gear wheel dead eye, in described gear wheel dead eye, be provided with bearing seal system, it is characterized in that: described bearing seal system is by cone metal joint ring, bit leg metallic packing ring, cone metal rubber seal, the energy supply of cone metal ring forms with wavy spring, described cone metal joint ring and the bit leg metallic packing ring composition end face seal structure that contacts, described cone metal joint ring middle part is with fluted, the energy supply of described cone metal ring is placed in described groove with wavy spring, the energy supply of cone metal ring touches with the inwall of wavy spring top and described gear wheel dead eye, described cone metal rubber seal is positioned at described cone metal joint ring one side, for sealing the gap between cone metal joint ring and gear wheel dead eye.
2. rock bit according to claim 1, is characterized in that: the cross section of described bit leg metallic packing ring is square.
3. rock bit according to claim 1, is characterized in that: the cross section of described bit leg metallic packing ring is trapezoidal, is provided with bit leg metal ring rubber energy supply circle between described bit leg metallic packing ring and described bit leg axle.
4. rock bit according to claim 1, is characterized in that: described cone metal joint ring and bit leg metallic packing ring form by the stainless tool steel of high-strength alloy is refining, and operative end surface essence is spread out into minute surface, and flatness is less than 0.005mm.
5. rock bit according to claim 1, is characterized in that: the energy supply of described cone metal ring is rolled up rich, stacking forming with wavy spring continuously by high-strength alloy Stainless Steel lenticular wire material one circle circle.
6. a mounting method for gear wheel bearing seal system, is characterized in that: comprise the following steps: first clean gear wheel dead eye, bit leg axle and all sealing system original papers and dry up with clean gas, leaving in respectively on special-purpose clean container or workbench;
Second step is assemblied in the gear wheel dead eye of gear wheel bearing by cone metal joint ring, cone metal rubber seal and the energy supply of cone metal ring with wavy spring;
The 3rd step is fixed on bit leg axle on metal sealing racking machine, center line and the metal sealing racking machine axis of bit leg axle are harmonious, bit leg metallic packing ring, bit leg metal ring rubber energy supply circle are then installed, after installation, machinery oil ， Shang oil level in bit leg metallic packing ring operative end surface Shang Shang tri-Shang cleaning is put evenly;
The 4th step is sleeved on the gear wheel bearing integral after having assembled on bit leg axle along bit leg axis;
Whether the 5th step meets the requirements with load (specific contact pressure) and the displacement curve of metal sealing racking machine survey line sealing system, changes sealing original paper as do not met, and ressembles, until meet designing requirement;
Locking steel ball and plug pin are finally installed, and are welded and fixed plug pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410257.4A CN104165028A (en) | 2014-08-20 | 2014-08-20 | Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410257.4A CN104165028A (en) | 2014-08-20 | 2014-08-20 | Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit |
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| Publication Number | Publication Date |
|---|---|
| CN104165028A true CN104165028A (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410410257.4A Pending CN104165028A (en) | 2014-08-20 | 2014-08-20 | Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105102753A (en) * | 2013-02-13 | 2015-11-25 | 维拉国际工业有限公司 | Rock bit having flexible metal faced seal |
| CN105781565A (en) * | 2016-04-29 | 2016-07-20 | 天津立林钻头有限公司 | Wavy spring energy-supply end face sealing system for TBM hob and mounting method thereof |
| CN108019152A (en) * | 2017-12-28 | 2018-05-11 | 苏州新锐合金工具股份有限公司 | A kind of monometallic seals bearing tricone bit |
| CN112835144A (en) * | 2020-12-31 | 2021-05-25 | 湖北特连光电科技有限公司 | Center-pressurized lens type connector structure |
-
2014
- 2014-08-20 CN CN201410410257.4A patent/CN104165028A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105102753A (en) * | 2013-02-13 | 2015-11-25 | 维拉国际工业有限公司 | Rock bit having flexible metal faced seal |
| CN105781565A (en) * | 2016-04-29 | 2016-07-20 | 天津立林钻头有限公司 | Wavy spring energy-supply end face sealing system for TBM hob and mounting method thereof |
| CN108019152A (en) * | 2017-12-28 | 2018-05-11 | 苏州新锐合金工具股份有限公司 | A kind of monometallic seals bearing tricone bit |
| CN112835144A (en) * | 2020-12-31 | 2021-05-25 | 湖北特连光电科技有限公司 | Center-pressurized lens type connector structure |
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Application publication date: 20141126 |
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| WD01 | Invention patent application deemed withdrawn after publication |