CN205605216U - TBM is wave spring energy supply formula metal end face seal system for hobbing cutter - Google Patents
TBM is wave spring energy supply formula metal end face seal system for hobbing cutter Download PDFInfo
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- CN205605216U CN205605216U CN201620391317.7U CN201620391317U CN205605216U CN 205605216 U CN205605216 U CN 205605216U CN 201620391317 U CN201620391317 U CN 201620391317U CN 205605216 U CN205605216 U CN 205605216U
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- knife rest
- cutter hub
- mounting groove
- packing ring
- wavy spring
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Abstract
The utility model relates to a stratum digging tool technical field especially relates to a TBM is wave spring energy supply formula metal end face seal system for hobbing cutter, including knife rest, cutter body, knife rest metallic sealing ring, knife rest wave spring, knife rest rubber seal, cutter body metallic sealing ring, cutter body wave spring, cutter body rubber seal, the knife rest rubber seal install in the knife rest mounting groove, the cutter body rubber seal install in the cutter body mounting groove, the knife rest wave spring install in the knife rest wave spring mounting groove, the cutter body wave spring install in the cutter body wave spring mounting groove, knife rest metallic sealing ring and knife rest wave spring arrange in in the knife rest seal groove, cutter body metallic sealing ring and cutter body wave spring arrange in in the cutter body seal groove. The whole anti high temperature of sealing system can the reinforce, and longe -lived security is high, and metallic sealing ring, wave spring repeatedly usable economic benefits are considerable in addition.
Description
Technical field
This utility model relates to stratum digging tool technical field, particularly relates to a kind of TBM hob wavy spring energy supply type metal end face seal system.
Background technology
TBM hob is the critical component that shield breaks rock driving, is widely used in subway construction, Tunnel Engineering and builds diversion culvert etc..
nullTBM hob rock breaking mechanism: cutterhead is under the thrust that shield machine is powerful，Hobboing cutter press-in rock stratum，Hobboing cutter revolves round the sun around cutter head center axle，Hobboing cutter is also around respective cutter shaft rotation simultaneously，Hobboing cutter is made to roll continuously on rock stratum，Cutterhead is applied to cutter ring push broach and rolling force (torque)，Thrust makes cutter ring be pressed into rock mass，Rolling force makes cutter ring roll rock mass，Rock mass is made to occur to crush extruding and the shearing of rock mass by hobboing cutter，Rock is formed concentric circular，When thrust exceedes the intensity of rock，The direct attrition crushing of rock under hobboing cutter，Hobboing cutter injection rock，Face is formed tunnel concentric grooves by hobboing cutter extruding fragmentation，Along with gash depth increases，Rock mass face crack is deepened to expand，When exceeding rock shearing and hot strength，Rock flaking between neighboring concentric circle groove，Form rock ballast，Rock ballast drops and rolls into conveyer at the bottom of hole，Conveyer is carried out work surface rock ballast.
We analyze from TBM hob rock breaking mechanism: the pressure of tens tons or even hundreds of ton of shield machine output finally to be born by hobboing cutter rolling bearing, in order to keep the normal work of bearing, not only need anti-high extreme pressure, high fortune strength viscosity, the lubricant grease of high dropping point to carry out sufficient lubrication rolling bearing, with greater need for high security, high life, resistant to elevated temperatures bearing seal system prevent bearing lubrication oils and fats leakage and different enter invasion.
The analysis losing efficacy TBM hob shows, bearing damage is the principal mode that TBM hob lost efficacy, and most reasons of bearing premature failure are because bearing seal system and lost efficacy, and is mainly manifested in that rubber energy supply sealing ring is damaged, melts, the form such as abrasion.Metal floating seal within TBM hob, owing to it is structurally characterized in that use in pairs, becket is provided the rubber energy supply circle of specific contact pressure, it is simultaneously used for the gap between sealing metal sealing ring and knife rest, cutter hub, if it occurs that the situations such as fusing, abrasion, breakage will be ineffective, therefore rubber energy supply sealing ring plays vital effect in sealing system.Determining bearing seal system and have the characteristic that not reproducible dismounting uses, according to statistics in the tunneling construction of rock stratum, cutter seals expense and has accounted for more than the 10% of cutter total cost.
As shown in Figure 6 and Figure 7, the metal end face seal system that existing TBM hob uses, gap between becket and knife rest, cutter hub is bigger, mud cutting carring silt particle is clamp-oned, rubber energy supply circle is promoted to clamp-on bottom metallic packing ring, increasing the specific contact pressure on sealing ring surface, becket frictional force increase causes temperature to rise fusing rubber energy supply sealing ring seal failure.Another kind of situation is that landwaste silt particle promotes rubber energy supply circle to clamp-on bottom metallic packing ring, and such metallic packing ring similarly is a brake, driving the increase of merit moment of torsion thus causing hobboing cutter not turn of cutter, causes cutterhead eccentric wear.
The metal end face seal system used because of existing TBM hob again, gap between becket and knife rest, cutter hub is bigger, mud cutting carring silt particle is clamp-oned, together with a becket is equally solidified to as cement by desiccation with another one sealing ring after a period of time, when hobboing cutter is rotated further by, the becket being freezing together can rotate and pull rubber energy supply sealing ring moment together, thus damages rubber energy supply sealing ring, causes sealing system to lose efficacy.
It is known that, the sealing system of TBM hob is substantially all and utilizes the elasticity of hydrogenated nitrile-butadiene rubber (HNBR) to provide energy for sealed working face now, hydrogenated nitrile-butadiene rubber (HNBR) is in chemical resistance, compress permanent deformation forever elastic, and tearing strength aspect has the performance of excellence, but in the stratum driving occasion under the continuous circulating temperature on 120 DEG C, owing to the particularity sealing system of operating mode can not get instant cooling, for losing efficacy for the hydrogenated nitrile-butadiene rubber of sealing system energy supply (HNBR) material elements will accelerate aging (must competing hydrogenated nitrile-butadiene rubber (HNBR) vulcanization forming temperature just 170 DEG C), sealing system rubber element once lost efficacy and has suffered sealing system and will collapse immediately under bad working environments, bearing is caused to be quickly invalidated hobboing cutter report degree.We, when dissection and analysis inefficacy hobboing cutter, find that high temperature melting state occurs in a lot of rubber seal, and cause the situation of seal failure, if can not find in time when hobboing cutter works to lead to liability accident.
The specific contact pressure of sealing surface is the key parameter of metal end face seal and rubber seal.If just envelope less than pressure is incessantly, the big then work surface quick abrasion than pressing through, the life-span is short, and friction temperature is high.The sealing system work surface newly installed has certain specific contact pressure, and it at least have to be larger than seal pressure differential, otherwise must leak undoubtedly, and along with the progress of work of sealing system, hydrogenated nitrile-butadiene rubber (HNBR) original paper of sealing system can aging and abrasion.Therefore new clothes bit contact can be larger than pressure, big how many guarantees seal does not leaks, the width of this sealing surface to be seen, the material character on both sides, surface configuration and roughness, the quality of TBM hob operating mode medium, pressure, temperature etc. condition, medium inside bearing seal system is high viscosity bearing grease, and outside is then the mud containing landwaste.The hobboing cutter of different model will be in the face of different operating modes, and the sealing system for the hobboing cutter of different model provides the constant lasting specific contact pressure of sealing surface the most accurately, then be the key point of sealing system.It is to be engaged in the problem that industry project planner have to do.
Utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned technology, and provides a kind of TBM hob wavy spring energy supply type metal end face seal system, overcomes the deficiency of existing rubber energy supply type metal end face seal system.
This utility model for achieving the above object, by the following technical solutions:
A kind of TBM hob wavy spring energy supply type metal end face seal system, it is characterised in that: include knife rest, cutter hub, knife rest metallic packing ring, knife rest wavy spring, knife rest rubber seal, cutter hub metallic packing ring, cutter hub wavy spring, cutter hub rubber seal；Symmetrical knife rest mounting groove and the cutter hub mounting groove of being provided with on described knife rest and cutter hub, described knife rest rubber seal is arranged in described knife rest mounting groove, and described cutter hub rubber seal is arranged in described cutter hub mounting groove；It is respectively equipped with knife rest wavy spring mounting groove and cutter hub wavy spring mounting groove the ring week of described knife rest metallic packing ring and cutter hub metallic packing ring, described knife rest wavy spring is arranged in described knife rest wavy spring mounting groove, and described cutter hub wavy spring is arranged in described cutter hub wavy spring mounting groove；The bottom of described knife rest mounting groove and cutter hub mounting groove is respectively equipped with knife rest seal groove and cutter hub seal groove, described knife rest metallic packing ring and knife rest wavy spring are placed in described knife rest seal groove, and described cutter hub metallic packing ring and cutter hub wavy spring are placed in described cutter hub seal groove；The end face of described knife rest metallic packing ring and cutter hub metallic packing ring rotates against formation friction pair.
Preferably, described knife rest metallic packing ring spreads out into minute surface with the end face essence of cutter hub metallic packing ring, and flatness is less than 0.005mm.
The beneficial effects of the utility model are: compared with prior art, this utility model wavy spring energy supply type metal end face seal system, and it is than pressure and the most constant that wavy spring is accurately controlled metallic packing ring end contact；Hardness alloy or high-strength alloy stainless tool steel becket intensity height, wear resistence, the strong energy of corrosion resistance；Rubber seal silicone rubber or fluorubber refine and form, and hardness is high, heat-resisting quantity is strong, it is aging to be difficult to.Therefore sealing system entirety high-temperature resistance is strong, and life-span long safety is high, and the reusable economic benefits of metallic packing ring, wavy spring.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of this utility model intermediate slide metallic packing ring；
Fig. 3 is the enlarged drawing in Fig. 2 at I；
Fig. 4 is the structural representation of cutter hub metallic packing ring in this utility model；
Fig. 5 is the enlarged drawing in Fig. 4 at I；
Fig. 6 is the structural representation of prior art；
Fig. 7 is the working state figure of prior art；
Fig. 8 is working state figure of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings and preferred embodiment describe in detail detailed description of the invention of the present utility model.As shown in Fig. 1 to Fig. 5 and Fig. 8, a kind of TBM hob wavy spring energy supply type metal end face seal system, including knife rest 1, cutter hub 2, knife rest metallic packing ring 3, knife rest wavy spring 4, knife rest rubber seal 5, cutter hub metallic packing ring 6, cutter hub wavy spring 7, cutter hub rubber seal 8；Symmetrical knife rest mounting groove 9 and the cutter hub mounting groove 10 of being provided with on described knife rest and cutter hub, described knife rest rubber seal is arranged in described knife rest mounting groove, and described cutter hub rubber seal is arranged in described cutter hub mounting groove；It is respectively equipped with knife rest wavy spring mounting groove 11 and cutter hub wavy spring mounting groove 12 the ring week of described knife rest metallic packing ring and cutter hub metallic packing ring, described knife rest wavy spring is arranged in described knife rest wavy spring mounting groove, and described cutter hub wavy spring is arranged in described cutter hub wavy spring mounting groove；The bottom of described knife rest mounting groove and cutter hub mounting groove is respectively equipped with knife rest seal groove 13 and cutter hub seal groove 14, described knife rest metallic packing ring and knife rest wavy spring are placed in described knife rest seal groove, and described cutter hub metallic packing ring and cutter hub wavy spring are placed in described cutter hub seal groove；The end face of described knife rest metallic packing ring and cutter hub metallic packing ring rotates against formation friction pair.Operation principle is: wavy spring energy supply type metal end face seal, and two becket end faces rotate against formation friction width；Becket operative end surface fits together and rotates around axle center in opposite directions, stops lubricant grease leakage and prevention bearing outer foreign body intrusion bearing in bearing.In order to ensure that two beckets fit together all the time, it is therefore desirable to knife rest wavy spring provides laminating kinetic energy (specific contact pressure) with cutter hub wavy spring to it.Gap silicone rubber or fluorubber between knife rest metallic packing ring and cutter hub metallic packing ring and knife rest, cutter hub seal.
Described knife rest metallic packing ring spreads out into minute surface with the end face essence of cutter hub metallic packing ring, and flatness is less than 0.005mm.Metallic packing ring is formed by the stainless tool steel of hard alloy or high-strength alloy is refined, and intensity is high, anticorrosive, anti-wear performance strong, and the good sealing effect life-span is long, reusable.
Installation method is:
Step one, clean knife rest and cutter hub and all sealing system original papers and dry up with clean gas, leaving in respectively on special clean container or workbench；
Step 2, machinery oil on the surface uniform application of knife rest rubber seal and cutter hub rubber seal is assemblied in knife rest mounting groove and cutter hub mounting groove on request；
Step 3, respectively knife rest wavy spring and cutter hub wavy spring are separately mounted in knife rest metallic packing ring and cutter hub metallic packing ring, with manpower, knife rest metallic packing ring and cutter hub metallic packing ring are steadily pressed in knife rest seal groove and cutter hub seal groove again, knife rest metallic packing ring and cutter hub metallic packing ring be on station after on knife rest metallic packing ring and cutter hub metallic packing ring operative end surface the machinery oil of three cleanings, oil level is put uniformly；
Step 4, the cutter hub knife rest being respectively mounted is in turn mounted on hobboing cutter cutter shaft；
Step 5, finally installation hobboing cutter tightening cover, test hobboing cutter starting torque, and moment of torsion meets the requirements and i.e. completes the assembling of sealing system.
Described knife rest wavy spring and cutter hub wavy spring, stacking rich by high-strength alloy Stainless Steel lenticular wire material one circle volume continuously respectively forms.
Knife rest wavy spring and cutter hub wavy spring are rich by high-strength alloy Stainless Steel lenticular wire material one circle volume continuously, stacking forms, also can normally work under 325 DEG C of operating modes, overall dimensions is accurate, displacement big rigidity curve smoothing, can be lasting, stable, accurately for metallic packing ring offer specific contact pressure.Reusable.
Knife rest rubber seal and cutter hub rubber seal silicone rubber or fluorubber is refined forms, hardness is high, heat-resisting quantity is strong, it is aging to be difficult to, also can work long hours in working temperature more than 240 DEG C.
Gap between knife rest metallic packing ring and cutter hub metallic packing ring and cutter hub, knife rest is the least, and during work, landwaste silt substantially injures less than rubber seal, and bearing internal external pressure reduction change simultaneously is the most little on its impact.
Hardmetal materials becket intensity is high, and ripple spring displacement is big, has certain flexibility, thus hobboing cutter starting torque is little, is not susceptible to cutterhead eccentric wear phenomenon.
Being arranged on top ripple spring in bearing, external agency is on its nothing impact, sealing system safety and effectivity.
This utility model wavy spring energy supply type metal end face seal system, it is than pressure and the most constant that wavy spring is accurately controlled metallic packing ring end contact；Hardness alloy or high-strength alloy stainless tool steel becket intensity height, wear resistence, the strong energy of corrosion resistance；Rubber seal silicone rubber or fluorubber refine and form, and hardness is high, heat-resisting quantity is strong, it is aging to be difficult to.Therefore sealing system entirety high-temperature resistance is strong, and life-span long safety is high, and the reusable economic benefits of metallic packing ring, wavy spring.
The above is only preferred implementation of the present utility model; it should be pointed out that, for those skilled in the art, on the premise of without departing from this utility model principle; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (2)
1. a TBM hob wavy spring energy supply type metal end face seal system, it is characterised in that: include knife rest, cutter hub, knife rest metallic packing ring, knife rest wavy spring, knife rest rubber seal, cutter hub metallic packing ring, cutter hub wavy spring, cutter hub rubber seal；Symmetrical knife rest mounting groove and the cutter hub mounting groove of being provided with on described knife rest and cutter hub, described knife rest rubber seal is arranged in described knife rest mounting groove, and described cutter hub rubber seal is arranged in described cutter hub mounting groove；It is respectively equipped with knife rest wavy spring mounting groove and cutter hub wavy spring mounting groove the ring week of described knife rest metallic packing ring and cutter hub metallic packing ring, described knife rest wavy spring is arranged in described knife rest wavy spring mounting groove, and described cutter hub wavy spring is arranged in described cutter hub wavy spring mounting groove；The bottom of described knife rest mounting groove and cutter hub mounting groove is respectively equipped with knife rest seal groove and cutter hub seal groove, described knife rest metallic packing ring and knife rest wavy spring are placed in described knife rest seal groove, and described cutter hub metallic packing ring and cutter hub wavy spring are placed in described cutter hub seal groove；The end face of described knife rest metallic packing ring and cutter hub metallic packing ring rotates against formation friction pair.
TBM hob wavy spring energy supply type metal end face seal system the most according to claim 1, it is characterised in that: described knife rest metallic packing ring spreads out into minute surface with the end face essence of cutter hub metallic packing ring, and flatness is less than 0.005mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620391317.7U CN205605216U (en) | 2016-04-29 | 2016-04-29 | TBM is wave spring energy supply formula metal end face seal system for hobbing cutter |
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| CN201620391317.7U CN205605216U (en) | 2016-04-29 | 2016-04-29 | TBM is wave spring energy supply formula metal end face seal system for hobbing cutter |
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| CN205605216U true CN205605216U (en) | 2016-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2016
- 2016-04-29 CN CN201620391317.7U patent/CN205605216U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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