CN1069557A - Floating metal sealing device for gear wheel drill head - Google Patents
Floating metal sealing device for gear wheel drill head Download PDFInfo
- Publication number
- CN1069557A CN1069557A CN 91105562 CN91105562A CN1069557A CN 1069557 A CN1069557 A CN 1069557A CN 91105562 CN91105562 CN 91105562 CN 91105562 A CN91105562 A CN 91105562A CN 1069557 A CN1069557 A CN 1069557A
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- CN
- China
- Prior art keywords
- gear wheel
- seal ring
- tooth pawl
- sealing device
- drill head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention belongs to the mechanical seal field, be applicable to slip and rolling bearing rock bit that oil drilling is used, mainly by gear wheel, tooth pawl axle, compositions such as seal ring, between gear wheel and tooth pawl axle, a seal ring is housed also, on tooth pawl shaft neck, a male cone (strobilus masculinus) is arranged, the smooth shoulder that contacts with seal ring is arranged in the endoporus of gear wheel, it can comply with the vibration and the swing of rock bit fully, antiwear and friction reduction property is good, axial dimension is less, and have the hydrldynamic pressure lubrication effect, and the round section joint ring sealing that is suitable for the comparable present use of rotating speed improves 4～6 times, and working life was above 80 hours.
Description
The invention belongs to the mechanical seal field, be applicable to slip and rolling bearing rock bit that oil drilling is used.
The life-span of rock bit depends primarily on bearing and sealed lubrication system.The task of sealing is the lubricating grease leakage that prevents that bearing bore is interior, and the mud that stops bit exterior to have corrosivity and abrasiveness is simultaneously invaded bearing bore, and sealing is in case inefficacy will cause bearing to wear and tear prematurely very soon, and drill bit is scrapped.At present, rock bit generally adopts the seal with elastometic washer of " O " shape, and it can only use under low-speed conditions, because under high-speed condition, and can rapid wearing and lost efficacy.Its basic reason is that necessary increase round section joint ring decrement promptly increases sealing load in order to seal the rock bit with work under vibration and the swing state effectively, and big sealing load causes the aggravation wearing and tearing of high rotating speed lower seal surface of contact.In addition, can form the convergence wedge shape of hydrodynamic in a side of round section joint ring contact mud, mud is easy to invade sealing contact surface, quickens its wearing and tearing.
U.S. Pat 4955400, US4516641, US4466622, US4394020 etc. disclose a kind of technological scheme that replaces round section joint ring to seal with metallic seal in the recent period, and some has been used for the production of rock bit.Such scheme has novel structure, and the characteristics such as element variation of sealing load are provided, but exists sealing configuration complicated, to deficiencys such as the compliance axial dimension relatively poor and sealing configuration that vibrates and swing are bigger.
The objective of the invention is to overcome the deficiency in the above-mentioned technology, provide a kind of and can adapt to rock bit vibration and swing, antiwear and friction reduction property is good, axial dimension is less, is applicable at a high speed reliable operation, long floating metal sealing device of life-span.
Floating metal sealing device for gear wheel drill head of the present invention, mainly form by gear wheel, tooth pawl axle, seal ring etc., between gear wheel and tooth pawl axle, a seal ring is housed also, on tooth pawl shaft neck, a male cone (strobilus masculinus) is arranged, the smooth shoulder that contacts with seal ring is arranged in the endoporus of gear wheel.
The inboard that the present invention also is achieved through the following technical solutions metallic packing ring is an inner conical surface, the semi-cone angle α of its conical surface is 10 ° to 40 °, the semi-cone angle β of tooth pawl axle male cone (strobilus masculinus) is 5 ° to 25 °, between the inner conical surface of the tooth pawl axle place conical surface, seal ring elastic seal ring is housed, the seal face of seal ring is near the mud one side plane of squaring up, and prevents that mud from invading; Near the inboard beveling of lubricating cavity, to form the hydrldynamic pressure lubrication sealing surface.
Description of drawings of the present invention is as follows:
Fig. 1 is floating metal sealing device for gear wheel drill head structural drawing (in three identical parts one);
Fig. 2 is the enlarged view of floating metal sealing device for gear wheel drill head hermetic unit A.
The present invention can comply with vibration and the swing of rock bit fully, and antiwear and friction reduction property is good, and axial dimension is littler, and has the hydrldynamic pressure lubrication effect, and the round section joint ring sealing that is suitable for the comparable present use of rotating speed improves 4～6 times, and service life was above 80 hours.
Below in conjunction with accompanying drawing, technical characteristics of the present invention is described further.
Referring to Fig. 1, tooth pawl 1 stretches out tooth pawl axle 2(downwards, and both are an integral body), the gear wheel 3 of band cutting teeth 4 matches with tooth pawl axle 2, and gear wheel 3 is sleeved on the tooth pawl axle 2, and with spin 5 gear wheel 3 and tooth pawl axle 2 is linked together.Spin 5 is packed into by through hole 6, withstands and welded together with tooth pawl 1 with plug pin 7.Lubricating grease in the oil storage chamber (not shown) enters the bearing district through passage 9.Floating metal sealing A is placed on the end of gear wheel 3.
Referring to Fig. 2, floating metal sealing is made up of the smooth shoulder 14 of male cone (strobilus masculinus) 11, seal ring 10, seal ring 8 and gear wheel 3 endoporus of tooth pawl axle 2 axle journals, seal ring 10 has inner conical surface 13 and seal face 12, seal ring 10 is processed into an inclined-plane with the inboard of smooth shoulder 14 surface of contact of gear wheel 3 endoporus, when gear wheel 3 vibrations, produce hydrldynamic pressure lubrication, thereby reduce the fretting wear of surface of contact.Seal ring 8 is compressed between 11 and 13 two conical surfaces, constitute static seal, prevent lubricating grease leakage and mud intrusion, seal ring 8 also applies an axial force to seal ring 10 simultaneously, force the smooth shoulder 14 of seal ring 10 and the seal face that is rotating closely to contact, when gear wheel 3 swings or vibration, the resiliently deformable of seal ring 8 compensates it, realizes sealing reliably.
The conical surface 11 semi-cone angle β=5～25 of tooth pawl axle 2 ° (present embodiment is 10 °), seal ring 10 inner cone semi-cone angle α=10～40 ° (present embodiment is 20 °).The motive sealing face 12 of the smooth shoulder 14 of gear wheel 3 endoporus and seal ring 10 requires closely to contact, must be Upon Strict Inspection during assembling, and leakage must not be arranged.Seal ring 8 materials generally adopt nitrile butadiene rubber, and Shao's formula hardness is 60～80, and " O " shape, "T"-shaped etc. can be adopted in the cross section.According to experiment, drill bit is 0.3～0.7MPa as sealing pressure at both sides difference when underground work, and seal ring 8 should guarantee the sealing load of the motive sealing face that offers 12 and 14 about 0.8～1.2MPa.
Claims (5)
1, floating metal sealing device for gear wheel drill head mainly is made up of gear wheel, tooth pawl axle, seal ring, it is characterized in that: on the tooth pawl shaft neck male cone (strobilus masculinus) is arranged; Between gear wheel and the tooth pawl axle seal ring is housed; The shoulder that contacts with seal ring is arranged in the endoporus of gear wheel.
2, according to the floating metal sealing device for gear wheel drill head described in the claim 1, it is characterized in that: the inboard of metallic packing ring is an inner conical surface.
3, according to the floating metal sealing device for gear wheel drill head described in the claim 1,2, it is characterized in that: the semi-cone angle β of tooth pawl axle male cone (strobilus masculinus) is 5 ° to 25 °, and the semi-cone angle α of seal ring inner conical surface is 10 ° to 40 °.
4, according to the floating metal sealing device for gear wheel drill head described in the claim 1,2, it is characterized in that: between the inner conical surface of the tooth pawl shaft neck place conical surface, seal ring elastic seal ring is housed.
5, according to the floating metal sealing device for gear wheel drill head described in the claim 1,2, it is characterized in that: the plane of squaring up outside seal ring and the gear wheel surface of contact, inboard beveling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105562 CN1069557A (en) | 1991-08-15 | 1991-08-15 | Floating metal sealing device for gear wheel drill head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105562 CN1069557A (en) | 1991-08-15 | 1991-08-15 | Floating metal sealing device for gear wheel drill head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1069557A true CN1069557A (en) | 1993-03-03 |
Family
ID=4907228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91105562 Pending CN1069557A (en) | 1991-08-15 | 1991-08-15 | Floating metal sealing device for gear wheel drill head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1069557A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054669C (en) * | 1996-05-16 | 2000-07-19 | 王用顺 | Bit of preventing gear wheel from dropping off |
| WO2008077278A1 (en) * | 2006-12-25 | 2008-07-03 | Limin Dai | A lengthened sealing and bearing assembly of a roller bit |
| CN105350915A (en) * | 2015-11-26 | 2016-02-24 | 江西飞龙钻头制造有限公司 | Sealing device for roller cone bit |
| CN109898995A (en) * | 2019-02-19 | 2019-06-18 | 西南石油大学 | A kind of combined type single-cone rotary drill bit with rolling ring-gear |
-
1991
- 1991-08-15 CN CN 91105562 patent/CN1069557A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054669C (en) * | 1996-05-16 | 2000-07-19 | 王用顺 | Bit of preventing gear wheel from dropping off |
| WO2008077278A1 (en) * | 2006-12-25 | 2008-07-03 | Limin Dai | A lengthened sealing and bearing assembly of a roller bit |
| CN101341310B (en) * | 2006-12-25 | 2011-04-06 | 戴利民 | Elongated sealed bearing for roller bit |
| CN105350915A (en) * | 2015-11-26 | 2016-02-24 | 江西飞龙钻头制造有限公司 | Sealing device for roller cone bit |
| CN105350915B (en) * | 2015-11-26 | 2017-11-21 | 江西飞龙钻头制造有限公司 | A kind of sealing device of rock bit |
| CN109898995A (en) * | 2019-02-19 | 2019-06-18 | 西南石油大学 | A kind of combined type single-cone rotary drill bit with rolling ring-gear |
| CN109898995B (en) * | 2019-02-19 | 2021-06-08 | 西南石油大学 | Combined single-cone bit with rolling gear ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C03 | Withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |