CN206206594U - Sealing structure and top driving device are returned in top in driving - Google Patents
Sealing structure and top driving device are returned in top in driving Download PDFInfo
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- CN206206594U CN206206594U CN201621318670.9U CN201621318670U CN206206594U CN 206206594 U CN206206594 U CN 206206594U CN 201621318670 U CN201621318670 U CN 201621318670U CN 206206594 U CN206206594 U CN 206206594U
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- revolving body
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- pressure relief
- relief opening
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Abstract
The utility model is related to top to drive technical field, sealing structure and top driving device are returned in being driven more particularly, to one kind top, including swiveling gear, revolving body and fixed cover, the fixed cover is sequentially coaxially inserted in the endoporus of the swiveling gear and revolving body, and it is fixed with floating piston in the lower end of the fixed cover, the first rotatory sealing portion is constituted between the floating piston and the endoporus of revolving body, the second rotatory sealing portion is constituted between the fixed cover and the endoporus of swiveling gear；The upper pressure relief opening and lower pressure relief opening being connected with each other are offered on the revolving body, the upper pressure relief opening is connected to the second rotatory sealing portion, and the lower pressure relief opening is connected to the first rotatory sealing portion.The top drive in return sealing structure be simple to manufacture, ease of assembly with detection, beneficial to promote with application.
Description
Technical field
The utility model is related to top to drive technical field, and sealing structure and top driving device are returned in being driven more particularly, to one kind top.
Background technology
At present, swiveling head is the important component that oil-well rig top is driven.Its function is mainly load-bearing with revolution.Back-up tong,
Preventer oil cylinder, dump ram, suspension ring and automatic elevator are undertaken on swiveling head.Swiveling head in the course of the work, due to
Emergent when carrying brill, swiveling head will bear 500 tons of pulling force；And, when thribble is changed, swiveling head needs revolution, by inclining oil
Cylinder drives suspension ring to go to crawl top to drive the thribble on periphery, so need to open up middle back oil road in swiveling head, for drive dump ram,
The executing agencies such as back-up tong oil cylinder, preventer oil cylinder, automatic elevator oil cylinder.Swiveling head body together with the back-up tong, suspension ring being installed on it,
The weight together such as dump ram, elevator has about 2.8 tons.In drilling process, this 2.8 tons weight passes through adjusting pad, clip
It is delivered on main shaft.This can accelerate the abrasion of adjusting pad.So typically allow swiveling head to float during drilling well, to reduce and avoid mill
Damage.
Existing top turns body sealing structure, as shown in figure 1, swiveling gear 4 is fixedly connected with revolving body 6 with bolt.Solid
Surely cover 2 upper ends and be mounted with a floating piston 15, the back-up ring axial limiting of floating piston 15 is on fixed cover 2.Floating piston 15
Rotatory sealing is used between outer ring and the endoporus of revolving body 6.The upper surface of floating piston 15, the lower surface of swiveling gear 4, outside fixed cover 2
Flotation chamber is formed between disc and revolving body inner headed face.Give flotation chamber one fixed pressure, just can be by revolving body 6 and rotary teeth
1-2mm is lifted on wheel 4.So main shaft gyration drilling well when, it is possible to avoid wear and tear adjusting pad.It is upper carry drilling rod when, revolving body can hold
By 500t pulling force, pulling force is still delivered on main shaft by adjusting pad 11 and clip 12.But at this moment swiveling head does not rotate, also just not
Can be worn and torn adjusting pad.A grease lubrication mouthful 20 is respectively added in the outside of upper lower support ring.
Existing structure has following shortcoming：1st, external leakage.The flotation chamber returned in being driven due to top persistently has pressure, has few
Gauging leaks and drains to outside dust ring.2nd, floating seal is easily leaked.Floating piston is spacing without radial direction, easily with revolving body one
Revolution is played, causes piston inner hole seal with O ring to fail.3rd, dismounting is inconvenient with replacing sealing.During installation, first gear wheel is attached to
Fixed set upper side, then floating piston is installed on fixed cover, then fixed cover is loaded in advance together with gear wheel, floating piston
Install in the revolving body of seal, then by gear wheel and revolving body screw and positioning pin connection, finally go up adjusting pad and clip.
Order during dismounting is opposite.Change every time and the connecting bolt between gear wheel and revolving body will be torn open when sealing is installed
Dress, it is very inconvenient.4th, the bad guarantee of installation quality.During installation, the endoporus of gear wheel can not with the female coaxial situation of revolving body
See, floating piston is cylindrical invisible with revolving body inner hole situation.Whether sealing is caused to damage during installation also invisible.5th, add
Work manufacturability is bad.Revolving body is a step blind hole, and processing technology is bad, and machining accuracy is difficult to ensure card.The groove of lower end is not yet
Convenient detection.
Utility model content
The purpose of this utility model is to provide during a kind of top is driven to return sealing structure and top driving device, to solve prior art
Present in the easy external leakage of hydraulic oil of revolving body, process and assemble precision be difficult to ensure card, change difficult sealing, processing and assembling essence
The technical problem of the difficult detection of degree.
In order to solve the above technical problems, the utility model is provided during a kind of top is driven returns sealing structure, it include swiveling gear,
Revolving body and fixed cover, the fixed cover are sequentially coaxially inserted in the endoporus of the swiveling gear and revolving body, and described
The lower end of fixed cover is fixed with floating piston, and the first rotatory sealing portion is constituted between the floating piston and the endoporus of revolving body,
The second rotatory sealing portion is constituted between the fixed cover and the endoporus of swiveling gear；Offer what is be connected with each other on the revolving body
Upper pressure relief opening and lower pressure relief opening, the upper pressure relief opening are connected to the second rotatory sealing portion, and the lower pressure relief opening is connected to institute
State the first rotatory sealing portion.
Further, the endoporus of the revolving body is offered for carrying out the appearance that rotatory sealing is connected with the floating piston
Receive groove, the lower pressure relief opening is connected to the inwall of the holding tank；The upper surface of the floating piston outer ring, the holding tank
Upper stage terrace, the outer wall of the fixed cover and revolving body top endoporus wall (i.e. holding tank top inner hole wall) limit jointly
One floating pressure chamber.
Further, the fixed cover axially offers the first oil duct and the second oil duct, first oil duct respectively along it
The floating pressure chamber is connected to, the hydraulic fluid port opened up from fixed cover top external cylindrical surface is from top to bottom to the floating of the revolving body
Pressure chamber carries out fuel feeding；Second oil duct is connected to the lower end in the second rotatory sealing portion, is connected with upper pressure relief opening, and by returning
Axial oil duct in swivel is connected with lower pressure relief opening.Second oil duct top external cylindrical surface from fixed cover is drawn, and draining is connected
To fuel tank.So as to avoid the sealing of floating piston lower end and the rotatory sealing of swiveling gear from bearing pressure, it is to avoid cause therefrom
External leakage.
Further, the endoporus of the revolving body is set to through hole, and two branch are provided with the inner hole wall of the revolving body
Carrier ring groove, and multiple seal grooves are provided between two support ring grooves；It is an oil duct between each rotatory sealing；
Each oil duct is mutually linked up with one of fixed cover axial oil duct, is re-introduced to fixed cover top external cylindrical surface and is drawn.This is returned in being
Common structure, excessive narration is not done herein.Wherein, a support ring groove is located at below the upper pressure relief opening, another
The individual support ring groove is located above the floating pressure chamber.
Further, the revolving body is identical with the diameter of bore of swiveling gear.
Further, used between the floating piston and fixed cover and be threadedly coupled, and by fastener radial positioning.
Further, sealing structure is returned during the top is driven also includes the main shaft of the hollow form for being inserted in the fixed cover, described
The lower end of revolving body is provided with flange, and the lower end of the main shaft by clip through being fixed after the endoporus of the flange.
Further, the clip is dismountable split-type structural, and tune is provided between the flange and clip
Whole pad.
Further, it is provided with wear plate between the flange and fixed cover.
The utility model also provides a kind of top driving device, and it includes that sealing structure is returned in described top in driving.
Using above-mentioned technical proposal, the utility model has the advantages that：
The utility model is provided during a kind of top is driven and returns sealing structure, is let out by all increasing before revolving body upper and lower side is sealed
Hydraulic fluid port, can so make the upper and lower rotatory sealing of revolving body be not subject to pressure, and avoid external leakage.And, sealing is returned in the top in driving
Structure is simple to manufacture, ease of assembly with detection, beneficial to promote with application.
Brief description of the drawings
In order to illustrate more clearly of the utility model specific embodiment or technical scheme of the prior art, below will be right
The accompanying drawing to be used needed for specific embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some implementation methods of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the sectional view that sealing structure is returned during top of the prior art is driven；
Fig. 2 is the sectional view that sealing structure is returned during top of the present utility model is driven；
Fig. 3 is the close-up schematic view in floating pressure chamber of the present utility model.
Reference：
1- main shafts；2- fixed covers；3-O shape circles；
4- swiveling gears；5- support rings；6- revolving bodies；
7- floating pressures chamber；8-O shape circles；Pressure relief opening under 9-；
10- flanges；11- adjusting pads；12- clips；
13- wear plates；14- fasteners；15- floating pistons；
The first rotatory sealings of 16- portion；The upper pressure relief openings of 17-；The second rotatory sealings of 18- portion；
19- dust rings；20- grease lubrication mouthful.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, this
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
It is term " " center ", " on ", D score, "left", "right", " perpendicular, it is necessary to explanation in description of the present utility model
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outward " are, based on orientation shown in the drawings or position relationship, to be only
Described with simplified for the ease of description the utility model, must had rather than the device or element for indicating or implying meaning specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to explanation, unless otherwise clearly defined and limited, term " is pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
Can be two connections of element internal.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
The utility model is described in further detail below by specific embodiment and with reference to accompanying drawing.
Embodiment one
As shown in Fig. 2 to 3, the present embodiment one is provided during a kind of top is driven and returns sealing structure, and it includes swiveling gear 4, revolution
Body 6 and fixed cover 2, fixed cover 2 are sequentially coaxially inserted in the endoporus of swiveling gear 4 and revolving body 6, and under fixed cover 2
End is fixed with floating piston 15, and the first rotatory sealing portion 16 is constituted between floating piston 15 and the endoporus of revolving body 6, that is,
Say, for rotatory sealing is connected between the endoporus of floating piston 15 and revolving body 6；Structure between the endoporus of fixed cover 2 and swiveling gear 4
Into the second rotatory sealing portion 18, i.e. for rotatory sealing is connected between the endoporus of fixed cover 2 and swiveling gear 4；And, in revolution
The upper pressure relief opening 17 and lower pressure relief opening 9 being connected with each other are offered on body 6, upper pressure relief opening 17 is connected to the second rotatory sealing portion 18,
Upper pressure relief opening 17 is located at the lower end in the second rotatory sealing portion 18, through the gap between the endoporus of fixed cover 2 and swiveling gear 4 and the
Two rotatory sealing portions 18 connect；Lower pressure relief opening 9 is connected to the first rotatory sealing portion 16, and lower pressure relief opening 9 is opened in floating piston 15
The position being in contact between the endoporus of revolving body 6.So, pressure release together with all increasing with bottom in the top of revolving body 6
Mouthful.Upper pressure relief opening 17 is connected with lower pressure relief opening 9 by the internal galleries of revolving body 6, individually takes back fuel tank, so that revolving body 6
Upper and lower ends outermost side seal is not subject to pressure, can avoid hydraulic oil external leakage.
Specifically, the endoporus of the revolving body 6 in the present embodiment is offered for carrying out rotatory sealing company with floating piston 15
The holding tank (similar to stepped annular groove, its size is greater than floating piston 15) for connecing, lower pressure relief opening 9 is connected to the interior of holding tank
Wall；The upper surface of the outer ring of floating piston 15, the outer wall of the upper stage terrace, holding tank inner hole surface and fixed cover 2 of holding tank are total to
It is same to limit a floating pressure chamber 7.
On floating pressure chamber 7, more specifically, the outer ring of floating piston 15 connects with the inner hole surface rotatory sealing of holding tank
Connect, because the thickness of floating piston 15 is less than holding tank longitudinal direction height, therefore, one can be formed in the top of the outer ring of floating piston 15
Individual cavity, this cavity is exactly floating pressure chamber 7.The floating pressure chamber 7 is by part and top bar in the inner hole surface of holding tank
Face, the upper surface of floating piston 15, the outer wall of fixed cover 2 are surrounded jointly, give 7 one, floating pressure chamber fixed pressure, just can
1-2mm will be lifted on revolving body 6 and gear wheel.When so main shaft 1 turns round drilling well, it is possible to avoid the adjusting pad 11 that weares and teares.
The fixed cover 2 of the present embodiment axially offers the first oil duct and the second oil duct respectively along it, and the first oil duct is connected to
Floating pressure chamber 7, is carried out to the floating pressure chamber 7 of revolving body 6 from top to bottom from the hydraulic fluid port that the top external cylindrical surface of fixed cover 2 is opened up
Fuel feeding；Second oil duct is connected to the lower end in the second rotatory sealing portion 18, is connected with upper pressure relief opening 17, and by revolving body 6
Axial oil duct is connected with lower pressure relief opening 9.Second oil duct is drawn from the top external cylindrical surface of fixed cover 2, and draining is communicated into fuel tank.From
And avoid the sealing of the lower end of floating piston 15 from bearing pressure with the rotatory sealing of swiveling gear 4, it is to avoid cause external leakage therefrom.
Annular oil groove is offered between the endoporus rotatory sealing (seal) of revolving body 6；Fixed cover is axially also provided with multiple oil ducts.Due to returning
Swivel 6 needs to carry out spinning movement, many executing agency's oil cylinders such as dump ram, back-up tong oil cylinder, preventer oil cylinder, automatically
Elevator oil cylinder etc. is all that, as revolving body rotates together, and the oil cylinder fuel feeding of these executing agencies can only just lead to the oil sources of pumping plant
Cross the axial oil duct of fixed cover 2 and be communicated to revolving body 6 each annular oil groove, then be connected with oil cylinder is performed.Therefore fixed cover 2 is each
Individual axial oil duct is all linked up with the oil groove between the endoporus rotatory sealing (seal) of revolving body 6, and each oil groove passes through again in revolving body 6
The mode of radial aperture guides to the periphery of revolving body 6.So the oil circuit of executing agency just can be from each cylindrical oil of revolving body 6
Mouth connection.This is also the common structure returned in hydraulic pressure.
The endoporus of the revolving body 6 of the present embodiment is set to through hole, and two support rings 5 are provided with the inner hole wall of revolving body 6
Groove, and multiple seal grooves are provided between two grooves of support ring 5；Annular between each rotatory sealing (seal)
Groove is exactly an oil duct.Wherein, a groove of support ring 5 is located at below upper pressure relief opening 17, another groove of support ring 5 position
Above floating pressure chamber 7.So, the endoporus of revolving body 6 can be with clamped one time processing in place with seal groove.And,
The inner seal liner groove of revolving body 6 can be from two ends detection in place, and all seal grooves all can detect.Compared to existing skill
, because being step blind hole structure, the seal groove dimensions near step end can't detect, groove precision for art, original inner hole structure
It is difficult to ensure that.
And, the two supports ring 5 in the present embodiment is all wrapped by hydraulic oil, and hydraulic oil can play lubrication well and make
With, it is not necessary to increase grease lubrication.
Further, the revolving body 6 in the present embodiment is identical with the diameter of bore of swiveling gear 4 (gear wheel).So return
After rotating disk 4 is pre-installed with revolving body 6, swiveling gear 4 and revolving body 6 can be regarded as an entirety.In dismounting, change sealing
Shi Buyong tears the connecting bolt between swiveling gear 4 and revolving body 6 open in addition, facilitates repair and maintenance.Compared to prior art, and it is former
Structure changes the connecting bolt and alignment pin that any rotatory sealing will be dismantled between gear wheel and revolving body 6, its work every time
Amount is very big.
And, after the swiveling gear 4 in the present embodiment dresses up an entirety in advance with revolving body 6, it is possible to detect rotary teeth
Take turns the coaxial situation of 4 endoporus and the endoporus of revolving body 6, it might even be possible to whole as one after swiveling gear 4 is pre-installed with revolving body 6
Body processes swiveling gear endoporus and revolving body endoporus, so as to ensure coaxiality of inner hole.In the insertion revolving body 6 of fixed cover 2 and revolution
During 4 endoporus of gear, fixed cover 2 and the coaxiality of inner hole situation of revolving body 6 can be visually inspected from lower end, can so ensure assembling
Quality.Compared to prior art, original structure gear wheel is to be mounted on fixed cover 2 at first, then by floating piston 15 mounted in fixation
The upper end of set 2, finally loads revolving body 6 by fixed cover 2 together with gear wheel, floating piston 15.In whole assembling process, greatly
Axiality between gear and floating piston 15, revolving body 6 cannot all be estimated and checked.
Additionally, the swiveling gear 4 in the present embodiment is identical with the diameter of bore of revolving body 6, it is possible to reduce the rule of rotatory sealing
Lattice species.Original structure rotatory sealing has three kinds of specifications, and new construction only has two kinds of specifications.Seal versatility can be improved.
Sealing structure is returned on the top in driving also include the main shaft 1 of the hollow form for being inserted in fixed cover 2, the lower end peace of revolving body 6
Equipped with flange 10, flange 10 is connected by screw with the lower end of revolving body 6.The lower end of main shaft 1 through flange 10 endoporus after pass through
Clip 12 is fixed.Adjusting pad 11 is housed between flange 10 and clip 12, for adjusting the floating distance of revolving body 6.The present embodiment
In floating piston 15 and fixed cover 2 between using being threadedly coupled, and by the radial positioning of fastener 14.
In the present embodiment, because the floating piston 15 in the present embodiment is placed on the lower end of revolving body 6.Floated with replacing in dismounting
When piston 15 is sealed, as long as clip 12 is dismantled, main shaft 1 is extracted, dismantle end flange 10, then rotation dismounting floating piston 15
Can (screwed hole being provided with the lower end of floating piston 15, dedicated for easy disassembly floating piston 15).It is former compared to prior art
There is structure when dismounting is with the sealing of floating piston 15 is changed, clip 12 is dismantled, extract main shaft 1, dismounting gear wheel and revolution
The connecting bolt of body 6 and alignment pin (it is difficult to dismounting), the related floating piston 15 of fixed cover 2 and gear wheel are pulled out from the endoporus of revolving body 6
Go out, then floating piston 15 is disassembled from fixed cover 2, then change the sealing on floating piston 15.The not side of this structure
Just part is to dismount the connecting bolt and alignment pin that will be dismounted between gear wheel and revolving body 6 every time.
Additionally, in the present embodiment, floating piston 15 can be just visually inspected after floating piston 15 is installed with revolving body 6
Axiality situation, it is to avoid eccentric holding phenomenon.Compared to prior art, and original structure, floating piston 15 is complete by gear wheel
Block, it is impossible to observe the axiality between floating piston 15 and revolving body 6.
And, in the present embodiment, floating piston 15 is used instead with fixed cover 2 and is threadedly coupled, and uses holding screw positioning and locking,
Static seal (O-ring) in the floating piston 15 that floating piston 15 is rotated and caused by revolving body 6 can be avoided to fail.This reality
Apply the lower surface of floating piston 15 in example and be provided with the uniform screwed hole of annular, be easy for the fabrication hole of floating piston dismounting.(by spiral shell
Nail is threaded into hole, and screw is stirred with hand or instrument, drives floating piston 15 to rotate and be easy to tear open and dress.)
Clip 12 in the present embodiment is dismountable split-type structural, and tune is provided between flange 10 and clip 12
Whole pad.The quantity of adjusting pad is not limited to, and can flexibly be set according to actual needs, is adjusted by adjusting the thickness of adjusting pad
Revolving body moves distance on floating, and this is consistent with original technology, herein no longer many narrations.
Certainly, wear plate 13 is also provided between flange 10 and fixed cover 2.
What deserves to be explained is, on the basis of said structure, those of ordinary skill in the art can also further deform
Or the improvement of additional functional, for example：Dust ring 19 is also provided between the endoporus of fixed cover 2 and swiveling gear 4, it is dust-proof
Circle 19 is located at the upper end in the second rotatory sealing portion 18.Additionally, between swiveling gear 4 and revolving body 6, and positioned at upper pressure relief opening 17
Outside be provided with O-ring 3.
Sealing structure is returned on the top that the present embodiment is provided installation process in driving is as follows：
The first step, the seal in assembling gear wheel (swiveling gear 4) and in revolving body 6；
Second step, an entirety is assembled into by gear wheel and revolving body 6 with bolt and latch, can now detect gear wheel
With the axiality situation of revolving body 6；
3rd step, a little butter, insertion revolving body 6 and gear wheel endoporus are smeared by the outer ring of fixed cover 2；
4th step, the O-ring 8 of the endoporus of floating piston 15 is installed, and spread some butter；
5th step, screws in the lower end screw thread of fixed cover 2, and fix locking (holding screw with holding screw by floating piston 15
It is screwed into from the endoporus of fixed cover 2), can now detect the axiality situation of floating piston 15 and the endoporus of revolving body 6；
6th step, wear-resistant pad is loaded in the counterbore of end flange 10；
7th step, mounting end flange 10, is tightened with bolt；
8th step, the endoporus of fixed cover 2 and the endoporus of end flange 10 are inserted by main shaft 1；
9th step, adjusting pad 11 is put into the counterbore of split type clip 12, and snaps in the annular groove of main shaft 1 together, then will
Split type clip 12 is tightened with bolt.
Embodiment two
The present embodiment two also provides a kind of top driving device, and sealing structure is returned in its top included in embodiment one in driving.For
Other concrete structures are described in detail in above example one, and here is omitted.
Finally it should be noted that：Various embodiments above is only used to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
1. sealing structure is returned in a kind of top in driving, it is characterised in that including swiveling gear, revolving body and fixed cover, the fixation
Set is sequentially coaxially inserted in the endoporus of the swiveling gear and revolving body, and is fixed with floating work in the lower end of the fixed cover
Plug, constitutes the first rotatory sealing portion between the floating piston and the endoporus of revolving body, the fixed cover is interior with swiveling gear
The second rotatory sealing portion is constituted between hole；The upper pressure relief opening and lower pressure relief opening being connected with each other are offered on the revolving body, it is described
Upper pressure relief opening is connected to the second rotatory sealing portion, and the lower pressure relief opening is connected to the first rotatory sealing portion.
2. sealing structure is returned in top according to claim 1 in driving, it is characterised in that the endoporus of the revolving body offers use
In the holding tank that rotatory sealing is connected is carried out with the floating piston, the lower pressure relief opening is connected to the inwall of the holding tank；
The upper surface of the floating piston outer ring revolving body step end face relative with floating piston upper surface, the fixed cover it is outer
The inner hole wall on wall and revolving body holding tank top limits a floating pressure chamber jointly.
3. sealing structure is returned in top according to claim 2 in driving, it is characterised in that the fixed cover is axially opened respectively along it
The first oil duct and the second oil duct are provided with, first oil duct is connected to the floating pressure chamber, by fixed cover top external cylindrical surface
The hydraulic fluid port for opening up carries out fuel feeding to the floating pressure chamber of the revolving body from top to bottom；Second oil duct is connected to the second rotation
The lower end of sealing, is connected with upper pressure relief opening, and is connected with lower pressure relief opening by the axial oil duct in revolving body, second oil
The hydraulic fluid port that road is opened up from fixed cover top external cylindrical surface is drawn, and draining is communicated into fuel tank.
4. sealing structure is returned in top according to claim 1 in driving, it is characterised in that the endoporus of the revolving body is set to lead to
Hole, is provided with two support ring grooves on the inner hole wall of the revolving body, and is provided with multiple close between two support ring grooves
Sealing groove；It is an oil duct between each seal；Each oil duct is mutually linked up with one of fixed cover axial oil duct, then by solid
Surely the hydraulic fluid port that set top external cylindrical surface is opened up is drawn, wherein, a support ring groove is located at below the upper pressure relief opening,
Another described support ring groove is located above the floating pressure chamber.
5. sealing structure is returned in top according to claim 4 in driving, it is characterised in that the revolving body is interior with swiveling gear
Bore dia is identical.
6. sealing structure is returned in top according to claim 1 in driving, it is characterised in that between the floating piston and fixed cover
Using threaded connection, and by fastener radial positioning.
7. sealing structure is returned during the top according to any one of claim 1-6 is driven, it is characterised in that also including being inserted in
The main shaft of the hollow form of fixed cover is stated, the lower end of the revolving body is provided with flange, and the lower end of the main shaft passes through the flange
Endoporus after fixed by clip.
8. sealing structure is returned in top according to claim 7 in driving, it is characterised in that the clip is dismountable split type
Structure, and it is provided with adjusting pad between the flange and clip.
9. sealing structure is returned in top according to claim 8 in driving, it is characterised in that be provided between the flange and fixed cover
Wear plate.
10. a kind of top driving device, it is characterised in that sealing structure is returned in being driven including the top any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621318670.9U CN206206594U (en) | 2016-12-02 | 2016-12-02 | Sealing structure and top driving device are returned in top in driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621318670.9U CN206206594U (en) | 2016-12-02 | 2016-12-02 | Sealing structure and top driving device are returned in top in driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206206594U true CN206206594U (en) | 2017-05-31 |
Family
ID=58754740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621318670.9U Active CN206206594U (en) | 2016-12-02 | 2016-12-02 | Sealing structure and top driving device are returned in top in driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206206594U (en) |
-
2016
- 2016-12-02 CN CN201621318670.9U patent/CN206206594U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20180123 Address after: 110000, No. 25, development road, Shenyang economic and Technological Development Zone, Liaoning Patentee after: Sany Heavy Equipment Co.,Ltd. Address before: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee before: KM Group Co., Ltd. |
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| TR01 | Transfer of patent right |