CN109268504A - A kind of rotary sealing appts of dual fail-safe - Google Patents
A kind of rotary sealing appts of dual fail-safe Download PDFInfo
- Publication number
- CN109268504A CN109268504A CN201811459057.2A CN201811459057A CN109268504A CN 109268504 A CN109268504 A CN 109268504A CN 201811459057 A CN201811459057 A CN 201811459057A CN 109268504 A CN109268504 A CN 109268504A
- Authority
- CN
- China
- Prior art keywords
- seal assembly
- shaft
- seal
- rotary sealing
- sleeve
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/182—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings with lubricating, cooling or draining means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The present invention provides a kind of rotary sealing appts of dual fail-safe, including shaft, sleeve is housed outside shaft, seal assembly is provided between shaft and sleeve, disk spring is assemblied in outside shaft, between retaining ring and seal assembly or between pressing component and seal assembly, and the opening of counterbalance spring is towards seal assembly；Secondary seal circle is provided on the outside of seal assembly.It is of the invention wear seal assembly during the work time after radial clearance can be compensated automatically under the action of disk spring, the axially external secondary seal circle that is provided with of seal assembly plays Double-insurance sealing as the second seal structures.
Description
Technical field
The present invention relates to the horizontal directional drilling machines and geological drilling all-hydraulic drill in field in no-excavation construction method
Technology, especially a kind of rotary sealing appts of dual fail-safe.
Background technique
For squash type drilling, that is, the mode to drill is that drill bit squeezes soil toward radial outer periphery for the drilling of horizontal directional drilling machine
Pressure, ground can't be discharged in soil, therefore the resistance that drill bit is subject in drilling process is very big, and drill bit rubs with ground the huge of interlayer
It wipes power and will cause drill bit and contact face temperature and sharply increase and change the metallographic structure of drilling tool material and reduce its service performance,
And influence its pore-forming and trombone slide quality, it is necessary to provide pressure medium (such as high pressure water or high pressure gas by mud or air compression system
Body) the stone soil barrier at drilling is softened and shifted, on the other hand, the pressure medium of mud or air compression system also acts as
Cooling effect is carried out to drill bit and drilling rod, prevents drill bit from influencing the drilling ability of drill bit because performance change occurs for high temperature, because
This, pressure medium is also used as a kind of cooling medium, can implement cooling to drill bit and drilling rod.Common practice is in power head master
Shaft end fills a rotary sealing appts, and the major function of rotary sealing appts is that coolant liquid or cooling air input drilling rod is cooling
Drill bit, the quality of sealing performance are directly related to cooling and the drilling effect of drill bit, to be related to the use of complete equipment
And construction quality.
The rotary sealing appts common problem of current existing horizontal directional drilling machine is sealing pressure-air or pressure
The ability of power water is poor, leads to pressure-air or pressure due to the abrasion of sealing element in rotation dynamic use process for a long time
Power water is easy to leak between the shaft and sealing element of rotation, so that the normal work to equipment impacts.Therefore, the prior art
In need a kind of scheme to solve this problem.
Summary of the invention
It is an object of that present invention to provide a kind of rotary sealing appts of dual fail-safe, are asked with solve to propose in background technique
Topic.
To achieve the above object, the present invention provides a kind of rotary sealing appts of dual fail-safe, including shaft 1, outside shaft
It is arranged with sleeve 2, seal assembly 4 is provided between shaft and sleeve, seal assembly is cylinder-like structure.The course of work
In, shaft follows dynamic head main spindle to rotate, and the inner radial wall of seal assembly is primary wear surface, and the inner wall of sleeve is in sealing group
4 axially inner side of component (i.e. close to the side of cooling medium entrance 20) is convexly equipped with retaining ring 24, and retaining ring 24 is for directly or indirectly keeping off
The end face of the firmly end face of the axial one end of seal assembly 4, the axial other end of seal assembly 4 is compressed by pressing component.
A kind of rotary sealing appts of dual fail-safe further include counterbalance spring 3, and counterbalance spring covers outside shaft, compensate bullet
The elastic force direction of spring is arranged along shaft axial direction, and counterbalance spring is against between retaining ring and seal assembly or is against pressing component
Between seal assembly.
Preferably, the counterbalance spring and seal assembly are symmetrically arranged two groups, and one group of seal assembly is corresponding
One retaining ring, one group of counterbalance spring and one group of pressing component, two groups of seal assemblies are symmetrically distributed in cooling medium entrance two sides,
One group of seal assembly is corresponding with shaft connection one end of dynamic head main spindle, and another group of seal assembly is opposite with the shaft other end
It answers.
Preferably, the contact point between counterbalance spring and seal assembly end face should be located at seal assembly axial end
Face becomes close to radially outer edge position so that inner wall has the seal assembly after certain abrasion when by axial compression power
Shape direction is mainly radially inside (direction of inner wall is directed toward by outer wall), rather than arbitrarily radial deformation, thus
The abrasion that compensation sealing sub-assembly inner radial wall occurs, extends the service life of seal assembly.
Preferably, counterbalance spring select it is at low cost and can flexibly the disk spring that uses of stack combinations (referring to figure
2), the opening of disk spring is towards seal assembly, to guarantee the contact point between counterbalance spring and seal assembly end face
In at seal assembly radially outer edge position.
Further, at least one set of in two groups of pressing components includes adjustment lock-bit nut 67, adjusts lock-bit nut 67
Equipped with the matched internal screw thread of 1 external screw thread of shaft, adjust lock-bit nut rotation is located in shaft, adjustment lock-bit nut it is direct or indirect
It is in axial direction tightened in shaft and compresses the counterbalance spring in sleeve with seal assembly.
In rotary sealing appts use process, the counterbalance spring that the abrasion of seal assembly is deformed by being compressed is provided
Elastic force dynamic compensation of water pressure is provided, so that the contact surface between seal assembly and shaft is always ensured that the state of being adjacent to, this
Process is self-compensating process, and after a period of time, the decrement that the inner wall of seal assembly continues to wear up to two counterbalance springs is fast
It releases and resiles, the pressure of two counterbalance springs is gradually reduced, at this time will the past close seal assembly of adjustment lock-bit nut
Direction rotate, so that counterbalance spring is back to compressive state again, seal assembly can enter the self-compensating process of next round, weight
Multiple repeatedly entirely ineffective to seal assembly, the service life of seal assembly is about original 5~7 times.
The disk spring and seal assembly are symmetrically arranged two groups, the corresponding gear of one group of seal assembly
Circle, one group of disk spring and one group of pressing component, two groups of seal assemblies are symmetrically distributed in cooling medium entrance two sides, and one group close
It is corresponding with shaft connection one end of dynamic head main spindle to seal sub-assembly, another group of seal assembly is corresponding with the shaft other end.
Further, the axially external of the seal assembly 4 is provided with secondary seal circle 8, and the setting of secondary seal circle exists
It is fitted closely in pressing component and with shaft radial outer wall.
Preferably, the secondary seal circle uses lip-type packing, lip shape secondary seal circle include V-type skeleton with it is O-shaped close
Seal, the decrement of O-ring seal are preferably 0.12~0.25mm, entirely ineffective in seal assembly and the duration arrives key
In the case that moment does not allow shut-down, lip shape secondary seal circle can make entire rotary sealing appts sealing performance extend 7~
15 days or so.
Sleeve outer wall is provided with tapped connector 22 in cooling medium inlet, and connector is for connecting from pump or compression
Pipeline that machine picks out and lead cool medium into inside rotary sealing appts, rotation stop plate 23, rotation stop plate are provided on sleeve outer wall
Prevent sleeve from rotating movement for connecting rotation preventive mechanism.
Position is equipped with cooling medium entrance 20 among the ferrule barrel, and sleeve lining corresponds to the position of cooling medium entrance
It is recessed with cyclic annular water channel 21, axially inside direction is equipped with cooling medium circulation passage 10 to shaft, cooling medium circulation passage
One end is connected to dynamic head main spindle inner passage, and the setting of the other end of cooling medium circulation passage is there are four side through hole 101, and four
The position of side through hole is corresponding with cyclic annular water channel.
The pressing component includes that the axially external compensation block of seal assembly is arranged in, and the end face of compensation block is for direct
Or seal assembly is resisted indirectly, compensation block is directed toward seal assembly axially inner side to the thrust of seal assembly, compensation block
Radial outer wall is provided with step structure, and sleeve lining is provided with the hole shoulder to match with compensation block step structure.
The present invention at least has the advantages that
The rotary sealing appts of dual fail-safe of the invention, which are provided with, can make seal assembly realize the compensation bullet compensated automatically
Spring, during the work time, seal assembly can remain the state that fits closely with shaft radial outer wall, effectively ensure
Seal reliability in work progress.
In order to further ensure sealing effect, the power contact point between counterbalance spring and seal assembly end face is arranged close
Sub-assembly end face edge position is sealed, the deformation direction of seal assembly can be made predominantly radially inside, rather than arbitrarily
Radial deformation, thus compensation sealing sub-assembly inner wall occur abrasion, can make seal assembly service life extend 5~7
Times.
First seal structures of the automatic compensation type seal assembly as rotary sealing appts in the present invention, also close
The axially external secondary seal circle that is provided with of sub-assembly is sealed as the second seal structures, seal assembly is entirely ineffective, work
Chance crucial moment phase cannot stop work again in the case that, secondary seal circle can be used as emergency sealing structure, extend use in 7~15 days
Time provides the necessary Emergency Preparedness time for construction personnel, and secondary seal circle and seal assembly jointly fill rotatory sealing
Double-insurance sealing effect is set.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is main view sectional view (the dish-shaped bullet of counterbalance spring use of the rotary sealing appts of the preferred embodiment of the present invention
Spring)；
Fig. 2 is the details enlarged drawing at the pressure-reducing ring of the rotary sealing appts of the preferred embodiment of the present invention.
In figure: 1- shaft, 10- cooling medium circulation passage, 101- side through hole, the connecting pin 11-, 2- sleeve, 20- is cooling to be situated between
Matter entrance, 21- ring-type water channel, 22- connector, 23- rotation stop plate, 24- retaining ring, 241- retaining ring one, 242- retaining ring two, the hole 25- shoulder one,
The hole 26- shoulder two, 3- counterbalance spring, 31- counterbalance spring one, 32- counterbalance spring two, 4- seal assembly, 41- seal assembly
One, 42- seal assembly two, 5- pressing component one, 51- compensation block one, 52- spring bearing one, 53- gland one, 54- is dust-proof
Circle, 6- pressing component two, 61- compensation block two, 62- spring bearing two, 63- isolation ring, 64- gland two, 65- thrust bearing, 66-
Baffle ring, 67- adjust lock-bit nut, and 7- pressure-reducing ring, 71- pressure-reducing ring one, 72- pressure-reducing ring two, 8- secondary seal circle, 81- bis- times close
Seal one, 82- secondary seal circle two.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
Referring to the rotary sealing appts of FIG. 1 to FIG. 2, including the shaft 1 for connecting horizontal directional drilling machine power head main shaft,
Axially inside direction is equipped with cooling medium circulation passage 10 to shaft 1, and outlet and the shaft of cooling medium circulation passage 10 are used for
The connecting pin 11 for connecting dynamic head main spindle is corresponding, sleeve 2 is arranged with outside shaft, position is equipped with cooling medium among ferrule barrel
Entrance 20.
Seal assembly 4 is provided between shaft radial outer wall and the inner wall of sleeve, seal assembly is cylinder-like structure,
In the course of work, shaft follows dynamic head main spindle to rotate, and the inner wall of seal assembly is primary wear surface, and the inner wall of sleeve is in leaning on
Nearly cooling medium inlet is equipped with retaining ring 24, and retaining ring 24 is used to directly or indirectly block the end face of the axial one end of seal assembly 4,
The end face of the axial other end of seal assembly 4 is compressed by pressing component.
Rotary sealing appts further include counterbalance spring 3, and counterbalance spring is set in outside shaft, the elastic force direction edge of counterbalance spring
The setting of shaft axial direction, counterbalance spring, which supports, to be located between retaining ring and seal assembly or to being located at pressing component and seal combination
Between part.
Counterbalance spring and seal assembly are symmetrically arranged two groups, the corresponding one group of counterbalance spring of one group of seal assembly
And one group of pressing component, two groups of seal assemblies are symmetrically distributed in cooling medium entrance radially opposite sides, one group of seal assembly with
One end (i.e. shaft axial direction left end in Fig. 1) that shaft connects dynamic head main spindle is corresponding, and another group of seal assembly and shaft are another
One end (i.e. shaft axial direction right end in Fig. 1) is corresponding.
Preferably, the contact point between counterbalance spring and seal assembly axial end face should be close to seal assembly
Radially outer edge position, so that inner wall has the seal assembly after certain abrasion when by axial compression power, deformation direction
Predominantly radially inwardly (direction of inner wall is directed toward by outer wall), rather than arbitrarily radial deformation, to compensate close
The abrasion that sub-assembly inner wall occurs is sealed, the service life of seal assembly is extended.
Preferably, counterbalance spring select it is at low cost and can flexibly the disk spring that uses of stack combinations (referring to figure
1), the opening of disk spring is towards seal assembly, to guarantee the contact point between counterbalance spring and seal assembly end face
In the marginal position at seal assembly outer wall position.
In the present invention, the pressing component, counterbalance spring and seal assembly of one end of corresponding shaft connection dynamic head main spindle
It is respectively defined as pressing component 1, counterbalance spring 1 and seal assembly 1, the pressing component of the corresponding shaft other end,
Counterbalance spring and seal assembly are respectively defined as pressing component 26, counterbalance spring 2 32 and seal assembly 2 42.
Further, the pressing component one include be set in shaft periphery and be located at sleeve inner compensation block 1 with
Spring bearing 1, compensation block 1 are located inside, and spring bearing 1 is located at outside, and pressing component one further includes gland one
53, gland one is fixed on sleeve, and gland one is compressed along axial compression spring bearing one is located at one 52 inside of spring bearing
Compensation block 1, seal assembly 1 and counterbalance spring 1.
Further, the pressing component two include compensation block 2 61, spring bearing 2 62, isolation ring 63, gland 2 64,
Thrust bearing 65, baffle ring 66 and adjustment lock-bit nut 67；Compensation block 2 61, spring bearing 2 62, isolation ring 63, thrust bearing 65
It is set in shaft periphery with baffle ring 66, five are sequentially distributed and maximum outside diameter is identical from inside to outside, and gland two is fixed on sleeve
On, gland two be equipped with for compensation block 2 61, spring bearing 2 62, isolation ring 63, thrust bearing 65 and baffle ring 66 by or come
The via hole of axial movement is returned, adjustment lock-bit nut 67 is equipped with and the 1 matched internal screw thread of end external screw thread of shaft, adjustment lock-bit nut
Rotation is located in shaft, and adjustment lock-bit nut is in axial direction tightened in shaft and passes through baffle ring 66, thrust bearing 65, isolation ring
63, spring bearing 2 62 and compensation block 2 61 compress the counterbalance spring 2 32 in sleeve with seal assembly 2 42.Support shaft
Holding one can be selected ball roller bearing with spring bearing two, and thrust ball bearing can be selected in thrust bearing, and thrust bearing is for improving
The smooth degree during lock-bit nut tightening is adjusted, operation is facilitated.
In rotary sealing appts use process, the abrasion of seal assembly one and seal assembly two is become by being compressed
Elastic force that the counterbalance spring one and counterbalance spring two of shape provide provides dynamic compensation of water pressure, keeps two seal assemblies (including close
Seal sub-assembly one and seal assembly two) and shaft between contact surface (i.e. seal assembly one and seal assembly two is interior
Wall) it is always ensured that the state of being adjacent to, and in the case where sleeve acts on the transmitting of power, the counterbalance spring one and counterbalance spring two that are arranged symmetrically
The balance of power can mutually be reached, this process is self-compensating process, and after a period of time, the inner wall of two seal assemblies continues to grind
It damages to the decrement of two counterbalance springs and releases and resile fastly, the also pressure of two counterbalance springs is gradually reduced, and will be adjusted at this time
Whole lock-bit nut is rotated toward the direction close to seal assembly, and counterbalance spring is made to be back to compressive state, seal assembly meeting again
Repeatedly entirely ineffective to seal assembly into the self-compensating process of next round, the service life of seal assembly is about
It is original 5~7 times.It should be pointed out that pressing component one and the position of pressing component two also can be interchanged, that is, adjust lock-bit
Nut may be mounted at any side, can also all be installed with two sides, and adjustment lock-bit nut is arranged in press fitting group in the present embodiment
Adjustment lock-bit nut need to only be screwed out shaft, by it primarily to keep each component of dismounting and change a little more convenient by two side of part
Remaining part part is pulled away from shaft with sleeve together, and sleeve is used to accommodate shaft and the central through hole of other component is arranged to centre
Hole is thin, and the thick structure of both ends of the hole, structure is simple, easy to process.
Preferably, the axially external of seal assembly 4 is provided with secondary seal circle 8, secondary seal circle 8 includes secondary close
Seal 1 and secondary seal circle 2 82, wherein secondary seal circle 1 is embedded in gland 1 and tight with shaft radial outer wall
Closely connected conjunction, secondary seal circle two is embedded in isolation ring and fits closely with shaft radial outer wall, in the present embodiment, secondary seal
It encloses 1 and is all made of lip-type packing, lip shape secondary seal circle 1 and lip shape secondary seal circle 2 82 with secondary seal circle 2 82
Include V-type skeleton and O-ring seal, the decrement of O-ring seal is preferably 0.12~0.25mm, seal assembly one with
Seal assembly two it is entirely ineffective and in the case that the duration does not allow shut-down to crucial moment, lip shape secondary seal circle one with
Lip shape secondary seal circle two can make the sealing performance of entire rotary sealing appts extend 7~15 days or so, i.e., in emergency
Under extend 7~15 days or so service life again, lip shape type sealing ring rises in the technical scheme with seal assembly combines dual fail-safe
Effect.
Further, pressing component one further includes the dustband 54 being embedded on one axial outer end end face of gland,
It is further preferred that the side wall of the compensation block one and compensation block two is provided with step structure, sleeve lining is set
It is equipped with the hole shoulder 1 and hole shoulder 2 26 to match respectively with the step structure of compensation block one, compensation block two, compensation block one and benefit
The step structure for repaying block two is respectively used to limit the limit that slides axially of compensation block one and compensation block two, can be in use process
Position and the axial height of compensation block step structure is set as needed, when adjust lock-bit nut can not turn when, illustrate to seal
The decrement of sub-assembly has reached limit value, and prompt should replace seal assembly.
The position that sleeve lining corresponds to cooling medium entrance is recessed with cyclic annular water channel 21, and retaining ring 24 includes being set to ring-type
The retaining ring 1 and retaining ring 2 242 of the two sides in channel width direction, retaining ring one connect one end pair of dynamic head main spindle with shaft
It answers, retaining ring two is corresponding with the shaft other end, and pressure-reducing ring 7 is a kind of nonmetallic hard sealing material, and pressure-reducing ring 7 includes pressure-reducing ring one
71 are embedded in retaining ring one and the preset groove of retaining ring two respectively with pressure-reducing ring 2 72, pressure-reducing ring one, pressure-reducing ring two, cooling medium
One end of circulation passage 10 is connected to dynamic head main spindle inner passage, and there are four sides for the other end setting of cooling medium circulation passage
Through-hole 101, the position of four side through hole is corresponding with cyclic annular water channel 21, and shaft turns to any position, and four side through hole can
Keep the state that be connected to cooling medium entrance 20, the width of cyclic annular water channel is greater than the diameter of side through hole 101, even if sleeve and turn
Certain axially opposing sliding has occurred in axis, and the state being connected to cooling medium entrance 20 can still be maintained in side through hole.
Sleeve outer wall is provided with tapped connector 22 in the welding of cooling medium inlet, and connector 22 is for connecting from water
It pumps the oil pipe picked out and leads cool medium into inside rotary sealing appts, rotation stop plate 23, rotation stop plate are provided on sleeve outer wall
It prevents sleeve from rotating movement for connecting rotation preventive mechanism, sleeve portion is locked, in the auxiliary of two spring bearings
It helps the lower rotation for reducing shaft of effect to swing, and nonrotational element (sleeve and its interior element) especially seal assembly can be reduced
Swing and straight line vibration, improve the service life of rotary sealing appts.
Particularly point out: inner wall, the outer wall being not explicitly defined in the present invention refer both to the inner wall of radial direction, outer wall, the present invention
In the inside, the outside that are not explicitly defined refer both to the inside of axial direction, outside.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of rotary sealing appts of dual fail-safe, which is characterized in that including shaft (1), be arranged with sleeve (2) outside shaft, turn
It is provided between axis radial outer wall and the inner wall of sleeve seal assembly (4), the inner wall of sleeve is in seal assembly axially inner side
It is convexly equipped with retaining ring (24), retaining ring is used to directly or indirectly block the end face of seal assembly axial direction one end, and seal assembly is axial
The end face of the other end is compressed by pressing component；
The rotary sealing appts further include disk spring (3), and disk spring is set in outside shaft, and disk spring supports and is located at retaining ring
Between seal assembly or to being located between pressing component and seal assembly；
The axially external of the seal assembly (4) is provided with secondary seal circle (8), and secondary seal circle is arranged in pressing component
And it is bonded with shaft radial outer wall.
2. a kind of rotary sealing appts of dual fail-safe according to claim 1, which is characterized in that the elastic force side of disk spring
It is arranged to along shaft axial direction, the opening of disk spring is towards seal assembly, to guarantee disk spring and seal assembly
Contact point between end face is located at seal assembly radially outer edge position, so that after inner radial wall has certain abrasion
For seal assembly when by axial compression power, deformation direction is predominantly radially inside.
3. a kind of rotary sealing appts of dual fail-safe according to claim 1, which is characterized in that the secondary seal circle is adopted
Use lip-type packing.
4. a kind of rotary sealing appts of dual fail-safe according to claim 3, which is characterized in that lip shape secondary seal circle packet
V-type skeleton and O-ring seal are included, the decrement of O-ring seal is 0.12~0.25mm.
5. a kind of rotary sealing appts of dual fail-safe according to claim 1, which is characterized in that sleeve outer wall is situated between in cooling
Matter inlet is provided with tapped connector (22), and connector, which is used to connect, to be situated between from the pipeline that pump or compressor pick out by cooling
Matter introduces inside rotary sealing appts, is provided on sleeve outer wall rotation stop plate (23), and rotation stop plate is for connecting rotation preventive mechanism and preventing
Only sleeve rotates movement.
6. a kind of rotary sealing appts of dual fail-safe according to claim 1, which is characterized in that the pressing component includes
The axially external compensation block of seal assembly is set, and the end face of compensation block is mended for directly or indirectly resisting seal assembly
It repays block and seal assembly axially inner side is directed toward to the thrust of seal assembly, the radial outer wall of compensation block is provided with step structure,
Sleeve lining is provided with the hole shoulder to match with compensation block step structure.
7. a kind of rotary sealing appts of dual fail-safe according to claim 1, which is characterized in that among the ferrule barrel
Position is equipped with cooling medium entrance (20), and the position that sleeve lining corresponds to cooling medium entrance is recessed with cyclic annular water channel (21), turns
Axially inside direction is equipped with cooling medium circulation passage (10) to axis, in one end and dynamic head main spindle of cooling medium circulation passage
The connection of portion channel, the other end setting of cooling medium circulation passage there are four side through hole (101), the position of four side through hole with
Cyclic annular water channel is corresponding.
8. a kind of rotary sealing appts of dual fail-safe described according to claim 1~any one of 7, which is characterized in that institute
It states disk spring and seal assembly is symmetrically arranged two groups, the corresponding retaining ring of one group of seal assembly, one group of dish
Spring and one group of pressing component, two groups of seal assemblies are symmetrically distributed in cooling medium entrance two sides, one group of seal assembly with
One end that shaft connects dynamic head main spindle is corresponding, and another group of seal assembly is corresponding with the shaft other end.
9. a kind of rotary sealing appts of dual fail-safe according to claim 8, which is characterized in that two groups of pressing components
Middle at least one set of including adjustment lock-bit nut (67), adjustment lock-bit nut is equipped with and the matched internal screw thread of shaft external screw thread, adjustment
Lock-bit nut rotation is located in shaft, adjustment lock-bit nut be directly or indirectly in axial direction tightened in shaft and will be in sleeve
Disk spring and seal assembly compress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811459057.2A CN109268504A (en) | 2018-11-30 | 2018-11-30 | A kind of rotary sealing appts of dual fail-safe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811459057.2A CN109268504A (en) | 2018-11-30 | 2018-11-30 | A kind of rotary sealing appts of dual fail-safe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109268504A true CN109268504A (en) | 2019-01-25 |
Family
ID=65186235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811459057.2A Withdrawn CN109268504A (en) | 2018-11-30 | 2018-11-30 | A kind of rotary sealing appts of dual fail-safe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109268504A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201756918U (en) * | 2010-08-19 | 2011-03-09 | 徐州徐工基础工程机械有限公司 | Rotation joint of a horizontal directional driller |
| CN103527076A (en) * | 2013-11-04 | 2014-01-22 | 恒天九五重工有限公司 | Top-driving-power faucet |
| CN203729875U (en) * | 2014-01-24 | 2014-07-23 | 桂林市华力重工机械有限责任公司 | Rotating water seal device used for drilling machine |
| CN205331420U (en) * | 2015-11-09 | 2016-06-22 | 重庆大学 | Slow -speed of revolution rotary seal structure |
-
2018
- 2018-11-30 CN CN201811459057.2A patent/CN109268504A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201756918U (en) * | 2010-08-19 | 2011-03-09 | 徐州徐工基础工程机械有限公司 | Rotation joint of a horizontal directional driller |
| CN103527076A (en) * | 2013-11-04 | 2014-01-22 | 恒天九五重工有限公司 | Top-driving-power faucet |
| CN203729875U (en) * | 2014-01-24 | 2014-07-23 | 桂林市华力重工机械有限责任公司 | Rotating water seal device used for drilling machine |
| CN205331420U (en) * | 2015-11-09 | 2016-06-22 | 重庆大学 | Slow -speed of revolution rotary seal structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109340489A (en) | A kind of wired and radio universal type rotary sealing appts | |
| CA2335691C (en) | Pressurized chamber seal cartridge | |
| CN109282039A (en) | A kind of dual fail-safe and high voltage bearing rotary sealing appts | |
| CN103062419A (en) | Steel forged refrigeration valve | |
| CA2063292C (en) | Impact resistant rotary joint | |
| CN105464882B (en) | Main shaft sealing device and the axial flow hydraulic turbine with the device | |
| CN109282036A (en) | The water supply or air supply system dual fail-safe of drilling machine and high voltage bearing rotary sealing appts | |
| CN109237029A (en) | A kind of rotary sealing appts | |
| CN109268504A (en) | A kind of rotary sealing appts of dual fail-safe | |
| CN109237043A (en) | A kind of rotary sealing appts of water supply or the air supply system dual fail-safe of drilling machine | |
| MX2014001666A (en) | Bearing assembly for a vertical turbine pump. | |
| CN109282038A (en) | A kind of high voltage bearing rotary sealing appts | |
| US20100230172A1 (en) | Seal assembly for a rotary earth bit | |
| CN109236224B (en) | Floating type double-stage sealing dry-grinding-preventing polish rod sealing box | |
| CN102606760A (en) | Nuclear class I electric ball valve | |
| CN109281613B (en) | Rotary sealing device for water supply or gas supply system of drilling machine | |
| CN102032345A (en) | Floating sealing structure of thrust shaft rod | |
| CN109282040A (en) | A kind of water supply of drilling machine or the high voltage bearing rotary sealing appts of air supply system | |
| CN106151572A (en) | High-temp and-pressure ball valve | |
| CN103851289A (en) | Large-sized high-temperature and high-pressure rotary joint | |
| CN205350060U (en) | Tandem type bearing for drilling tool | |
| CN204153147U (en) | Pumping anti-leak mechanical seal device | |
| CN205330867U (en) | Shaft seal device and have device's axial flow turbine | |
| CN110566151B (en) | Floating sealing device for drill rod of orifice | |
| CN211009930U (en) | Vector sealing valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190125 |